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 #include <linux/zstd.h>
  29 #include <linux/lz4.h>
  30
  31 #include "f2fs.h"
  32 #include "node.h"
  33 #include "segment.h"
  34 #include "xattr.h"
  35 #include "gc.h"
  36
  37 #define CREATE_TRACE_POINTS
  38 #include <trace/events/f2fs.h>
  39
  40 static struct kmem_cache *f2fs_inode_cachep;
  41
  42 #ifdef CONFIG_F2FS_FAULT_INJECTION
  43
  44 const char *f2fs_fault_name[FAULT_MAX] = {
  45         [FAULT_KMALLOC]         = "kmalloc",
  46         [FAULT_KVMALLOC]        = "kvmalloc",
  47         [FAULT_PAGE_ALLOC]      = "page alloc",
  48         [FAULT_PAGE_GET]        = "page get",
  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_checkpoint_merge,
 147         Opt_nocheckpoint_merge,
 148         Opt_compress_algorithm,
 149         Opt_compress_log_size,
 150         Opt_compress_extension,
 151         Opt_compress_chksum,
 152         Opt_compress_mode,
 153         Opt_atgc,
 154         Opt_err,
 155 };
 156
 157 static match_table_t f2fs_tokens = {
 158         {Opt_gc_background, "background_gc=%s"},
 159         {Opt_disable_roll_forward, "disable_roll_forward"},
 160         {Opt_norecovery, "norecovery"},
 161         {Opt_discard, "discard"},
 162         {Opt_nodiscard, "nodiscard"},
 163         {Opt_noheap, "no_heap"},
 164         {Opt_heap, "heap"},
 165         {Opt_user_xattr, "user_xattr"},
 166         {Opt_nouser_xattr, "nouser_xattr"},
 167         {Opt_acl, "acl"},
 168         {Opt_noacl, "noacl"},
 169         {Opt_active_logs, "active_logs=%u"},
 170         {Opt_disable_ext_identify, "disable_ext_identify"},
 171         {Opt_inline_xattr, "inline_xattr"},
 172         {Opt_noinline_xattr, "noinline_xattr"},
 173         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 174         {Opt_inline_data, "inline_data"},
 175         {Opt_inline_dentry, "inline_dentry"},
 176         {Opt_noinline_dentry, "noinline_dentry"},
 177         {Opt_flush_merge, "flush_merge"},
 178         {Opt_noflush_merge, "noflush_merge"},
 179         {Opt_nobarrier, "nobarrier"},
 180         {Opt_fastboot, "fastboot"},
 181         {Opt_extent_cache, "extent_cache"},
 182         {Opt_noextent_cache, "noextent_cache"},
 183         {Opt_noinline_data, "noinline_data"},
 184         {Opt_data_flush, "data_flush"},
 185         {Opt_reserve_root, "reserve_root=%u"},
 186         {Opt_resgid, "resgid=%u"},
 187         {Opt_resuid, "resuid=%u"},
 188         {Opt_mode, "mode=%s"},
 189         {Opt_io_size_bits, "io_bits=%u"},
 190         {Opt_fault_injection, "fault_injection=%u"},
 191         {Opt_fault_type, "fault_type=%u"},
 192         {Opt_lazytime, "lazytime"},
 193         {Opt_nolazytime, "nolazytime"},
 194         {Opt_quota, "quota"},
 195         {Opt_noquota, "noquota"},
 196         {Opt_usrquota, "usrquota"},
 197         {Opt_grpquota, "grpquota"},
 198         {Opt_prjquota, "prjquota"},
 199         {Opt_usrjquota, "usrjquota=%s"},
 200         {Opt_grpjquota, "grpjquota=%s"},
 201         {Opt_prjjquota, "prjjquota=%s"},
 202         {Opt_offusrjquota, "usrjquota="},
 203         {Opt_offgrpjquota, "grpjquota="},
 204         {Opt_offprjjquota, "prjjquota="},
 205         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 206         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 207         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 208         {Opt_whint, "whint_mode=%s"},
 209         {Opt_alloc, "alloc_mode=%s"},
 210         {Opt_fsync, "fsync_mode=%s"},
 211         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 212         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 213         {Opt_inlinecrypt, "inlinecrypt"},
 214         {Opt_checkpoint_disable, "checkpoint=disable"},
 215         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 216         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 217         {Opt_checkpoint_enable, "checkpoint=enable"},
 218         {Opt_checkpoint_merge, "checkpoint_merge"},
 219         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 220         {Opt_compress_algorithm, "compress_algorithm=%s"},
 221         {Opt_compress_log_size, "compress_log_size=%u"},
 222         {Opt_compress_extension, "compress_extension=%s"},
 223         {Opt_compress_chksum, "compress_chksum"},
 224         {Opt_compress_mode, "compress_mode=%s"},
 225         {Opt_atgc, "atgc"},
 226         {Opt_err, NULL},
 227 };
 228
 229 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 230 {
 231         struct va_format vaf;
 232         va_list args;
 233         int level;
 234
 235         va_start(args, fmt);
 236
 237         level = printk_get_level(fmt);
 238         vaf.fmt = printk_skip_level(fmt);
 239         vaf.va = &args;
 240         printk("%c%cF2FS-fs (%s): %pV\n",
 241                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 242
 243         va_end(args);
 244 }
 245
 246 #ifdef CONFIG_UNICODE
 247 static const struct f2fs_sb_encodings {
 248         __u16 magic;
 249         char *name;
 250         char *version;
 251 } f2fs_sb_encoding_map[] = {
 252         {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
 253 };
 254
 255 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
 256                                  const struct f2fs_sb_encodings **encoding,
 257                                  __u16 *flags)
 258 {
 259         __u16 magic = le16_to_cpu(sb->s_encoding);
 260         int i;
 261
 262         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 263                 if (magic == f2fs_sb_encoding_map[i].magic)
 264                         break;
 265
 266         if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
 267                 return -EINVAL;
 268
 269         *encoding = &f2fs_sb_encoding_map[i];
 270         *flags = le16_to_cpu(sb->s_encoding_flags);
 271
 272         return 0;
 273 }
 274 #endif
 275
 276 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 277 {
 278         block_t limit = min((sbi->user_block_count << 1) / 1000,
 279                         sbi->user_block_count - sbi->reserved_blocks);
 280
 281         /* limit is 0.2% */
 282         if (test_opt(sbi, RESERVE_ROOT) &&
 283                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 284                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 285                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 286                           F2FS_OPTION(sbi).root_reserved_blocks);
 287         }
 288         if (!test_opt(sbi, RESERVE_ROOT) &&
 289                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 290                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 291                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 292                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 293                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 294                           from_kuid_munged(&init_user_ns,
 295                                            F2FS_OPTION(sbi).s_resuid),
 296                           from_kgid_munged(&init_user_ns,
 297                                            F2FS_OPTION(sbi).s_resgid));
 298 }
 299
 300 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 301 {
 302         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 303                 return;
 304
 305         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 306                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 307         else
 308                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 309                                         F2FS_OPTION(sbi).unusable_cap_perc;
 310
 311         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 312                         F2FS_OPTION(sbi).unusable_cap,
 313                         F2FS_OPTION(sbi).unusable_cap_perc);
 314 }
 315
 316 static void init_once(void *foo)
 317 {
 318         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 319
 320         inode_init_once(&fi->vfs_inode);
 321 }
 322
 323 #ifdef CONFIG_QUOTA
 324 static const char * const quotatypes[] = INITQFNAMES;
 325 #define QTYPE2NAME(t) (quotatypes[t])
 326 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 327                                                         substring_t *args)
 328 {
 329         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 330         char *qname;
 331         int ret = -EINVAL;
 332
 333         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 334                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 335                 return -EINVAL;
 336         }
 337         if (f2fs_sb_has_quota_ino(sbi)) {
 338                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 339                 return 0;
 340         }
 341
 342         qname = match_strdup(args);
 343         if (!qname) {
 344                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 345                 return -ENOMEM;
 346         }
 347         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 348                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 349                         ret = 0;
 350                 else
 351                         f2fs_err(sbi, "%s quota file already specified",
 352                                  QTYPE2NAME(qtype));
 353                 goto errout;
 354         }
 355         if (strchr(qname, '/')) {
 356                 f2fs_err(sbi, "quotafile must be on filesystem root");
 357                 goto errout;
 358         }
 359         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 360         set_opt(sbi, QUOTA);
 361         return 0;
 362 errout:
 363         kfree(qname);
 364         return ret;
 365 }
 366
 367 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 368 {
 369         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 370
 371         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 372                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 373                 return -EINVAL;
 374         }
 375         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 376         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 377         return 0;
 378 }
 379
 380 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 381 {
 382         /*
 383          * We do the test below only for project quotas. 'usrquota' and
 384          * 'grpquota' mount options are allowed even without quota feature
 385          * to support legacy quotas in quota files.
 386          */
 387         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 388                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 389                 return -1;
 390         }
 391         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 392                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 393                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 394                 if (test_opt(sbi, USRQUOTA) &&
 395                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 396                         clear_opt(sbi, USRQUOTA);
 397
 398                 if (test_opt(sbi, GRPQUOTA) &&
 399                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 400                         clear_opt(sbi, GRPQUOTA);
 401
 402                 if (test_opt(sbi, PRJQUOTA) &&
 403                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 404                         clear_opt(sbi, PRJQUOTA);
 405
 406                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 407                                 test_opt(sbi, PRJQUOTA)) {
 408                         f2fs_err(sbi, "old and new quota format mixing");
 409                         return -1;
 410                 }
 411
 412                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 413                         f2fs_err(sbi, "journaled quota format not specified");
 414                         return -1;
 415                 }
 416         }
 417
 418         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 419                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 420                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 421         }
 422         return 0;
 423 }
 424 #endif
 425
 426 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 427                                           const char *opt,
 428                                           const substring_t *arg,
 429                                           bool is_remount)
 430 {
 431         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 432 #ifdef CONFIG_FS_ENCRYPTION
 433         int err;
 434
 435         if (!f2fs_sb_has_encrypt(sbi)) {
 436                 f2fs_err(sbi, "Encrypt feature is off");
 437                 return -EINVAL;
 438         }
 439
 440         /*
 441          * This mount option is just for testing, and it's not worthwhile to
 442          * implement the extra complexity (e.g. RCU protection) that would be
 443          * needed to allow it to be set or changed during remount.  We do allow
 444          * it to be specified during remount, but only if there is no change.
 445          */
 446         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 447                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 448                 return -EINVAL;
 449         }
 450         err = fscrypt_set_test_dummy_encryption(
 451                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 452         if (err) {
 453                 if (err == -EEXIST)
 454                         f2fs_warn(sbi,
 455                                   "Can't change test_dummy_encryption on remount");
 456                 else if (err == -EINVAL)
 457                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 458                                   opt);
 459                 else
 460                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 461                                   opt, err);
 462                 return -EINVAL;
 463         }
 464         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 465 #else
 466         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 467 #endif
 468         return 0;
 469 }
 470
 471 #ifdef CONFIG_F2FS_FS_COMPRESSION
 472 #ifdef CONFIG_F2FS_FS_LZ4
 473 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 474 {
 475 #ifdef CONFIG_F2FS_FS_LZ4HC
 476         unsigned int level;
 477 #endif
 478
 479         if (strlen(str) == 3) {
 480                 F2FS_OPTION(sbi).compress_level = 0;
 481                 return 0;
 482         }
 483
 484 #ifdef CONFIG_F2FS_FS_LZ4HC
 485         str += 3;
 486
 487         if (str[0] != ':') {
 488                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 489                 return -EINVAL;
 490         }
 491         if (kstrtouint(str + 1, 10, &level))
 492                 return -EINVAL;
 493
 494         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 495                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 496                 return -EINVAL;
 497         }
 498
 499         F2FS_OPTION(sbi).compress_level = level;
 500         return 0;
 501 #else
 502         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 503         return -EINVAL;
 504 #endif
 505 }
 506 #endif
 507
 508 #ifdef CONFIG_F2FS_FS_ZSTD
 509 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 510 {
 511         unsigned int level;
 512         int len = 4;
 513
 514         if (strlen(str) == len) {
 515                 F2FS_OPTION(sbi).compress_level = 0;
 516                 return 0;
 517         }
 518
 519         str += len;
 520
 521         if (str[0] != ':') {
 522                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 523                 return -EINVAL;
 524         }
 525         if (kstrtouint(str + 1, 10, &level))
 526                 return -EINVAL;
 527
 528         if (!level || level > ZSTD_maxCLevel()) {
 529                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 530                 return -EINVAL;
 531         }
 532
 533         F2FS_OPTION(sbi).compress_level = level;
 534         return 0;
 535 }
 536 #endif
 537 #endif
 538
 539 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 540 {
 541         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 542         substring_t args[MAX_OPT_ARGS];
 543 #ifdef CONFIG_F2FS_FS_COMPRESSION
 544         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 545         int ext_cnt;
 546 #endif
 547         char *p, *name;
 548         int arg = 0;
 549         kuid_t uid;
 550         kgid_t gid;
 551         int ret;
 552
 553         if (!options)
 554                 return 0;
 555
 556         while ((p = strsep(&options, ",")) != NULL) {
 557                 int token;
 558                 if (!*p)
 559                         continue;
 560                 /*
 561                  * Initialize args struct so we know whether arg was
 562                  * found; some options take optional arguments.
 563                  */
 564                 args[0].to = args[0].from = NULL;
 565                 token = match_token(p, f2fs_tokens, args);
 566
 567                 switch (token) {
 568                 case Opt_gc_background:
 569                         name = match_strdup(&args[0]);
 570
 571                         if (!name)
 572                                 return -ENOMEM;
 573                         if (!strcmp(name, "on")) {
 574                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 575                         } else if (!strcmp(name, "off")) {
 576                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 577                         } else if (!strcmp(name, "sync")) {
 578                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 579                         } else {
 580                                 kfree(name);
 581                                 return -EINVAL;
 582                         }
 583                         kfree(name);
 584                         break;
 585                 case Opt_disable_roll_forward:
 586                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 587                         break;
 588                 case Opt_norecovery:
 589                         /* this option mounts f2fs with ro */
 590                         set_opt(sbi, NORECOVERY);
 591                         if (!f2fs_readonly(sb))
 592                                 return -EINVAL;
 593                         break;
 594                 case Opt_discard:
 595                         set_opt(sbi, DISCARD);
 596                         break;
 597                 case Opt_nodiscard:
 598                         if (f2fs_sb_has_blkzoned(sbi)) {
 599                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 600                                 return -EINVAL;
 601                         }
 602                         clear_opt(sbi, DISCARD);
 603                         break;
 604                 case Opt_noheap:
 605                         set_opt(sbi, NOHEAP);
 606                         break;
 607                 case Opt_heap:
 608                         clear_opt(sbi, NOHEAP);
 609                         break;
 610 #ifdef CONFIG_F2FS_FS_XATTR
 611                 case Opt_user_xattr:
 612                         set_opt(sbi, XATTR_USER);
 613                         break;
 614                 case Opt_nouser_xattr:
 615                         clear_opt(sbi, XATTR_USER);
 616                         break;
 617                 case Opt_inline_xattr:
 618                         set_opt(sbi, INLINE_XATTR);
 619                         break;
 620                 case Opt_noinline_xattr:
 621                         clear_opt(sbi, INLINE_XATTR);
 622                         break;
 623                 case Opt_inline_xattr_size:
 624                         if (args->from && match_int(args, &arg))
 625                                 return -EINVAL;
 626                         set_opt(sbi, INLINE_XATTR_SIZE);
 627                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 628                         break;
 629 #else
 630                 case Opt_user_xattr:
 631                         f2fs_info(sbi, "user_xattr options not supported");
 632                         break;
 633                 case Opt_nouser_xattr:
 634                         f2fs_info(sbi, "nouser_xattr options not supported");
 635                         break;
 636                 case Opt_inline_xattr:
 637                         f2fs_info(sbi, "inline_xattr options not supported");
 638                         break;
 639                 case Opt_noinline_xattr:
 640                         f2fs_info(sbi, "noinline_xattr options not supported");
 641                         break;
 642 #endif
 643 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 644                 case Opt_acl:
 645                         set_opt(sbi, POSIX_ACL);
 646                         break;
 647                 case Opt_noacl:
 648                         clear_opt(sbi, POSIX_ACL);
 649                         break;
 650 #else
 651                 case Opt_acl:
 652                         f2fs_info(sbi, "acl options not supported");
 653                         break;
 654                 case Opt_noacl:
 655                         f2fs_info(sbi, "noacl options not supported");
 656                         break;
 657 #endif
 658                 case Opt_active_logs:
 659                         if (args->from && match_int(args, &arg))
 660                                 return -EINVAL;
 661                         if (arg != 2 && arg != 4 &&
 662                                 arg != NR_CURSEG_PERSIST_TYPE)
 663                                 return -EINVAL;
 664                         F2FS_OPTION(sbi).active_logs = arg;
 665                         break;
 666                 case Opt_disable_ext_identify:
 667                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 668                         break;
 669                 case Opt_inline_data:
 670                         set_opt(sbi, INLINE_DATA);
 671                         break;
 672                 case Opt_inline_dentry:
 673                         set_opt(sbi, INLINE_DENTRY);
 674                         break;
 675                 case Opt_noinline_dentry:
 676                         clear_opt(sbi, INLINE_DENTRY);
 677                         break;
 678                 case Opt_flush_merge:
 679                         set_opt(sbi, FLUSH_MERGE);
 680                         break;
 681                 case Opt_noflush_merge:
 682                         clear_opt(sbi, FLUSH_MERGE);
 683                         break;
 684                 case Opt_nobarrier:
 685                         set_opt(sbi, NOBARRIER);
 686                         break;
 687                 case Opt_fastboot:
 688                         set_opt(sbi, FASTBOOT);
 689                         break;
 690                 case Opt_extent_cache:
 691                         set_opt(sbi, EXTENT_CACHE);
 692                         break;
 693                 case Opt_noextent_cache:
 694                         clear_opt(sbi, EXTENT_CACHE);
 695                         break;
 696                 case Opt_noinline_data:
 697                         clear_opt(sbi, INLINE_DATA);
 698                         break;
 699                 case Opt_data_flush:
 700                         set_opt(sbi, DATA_FLUSH);
 701                         break;
 702                 case Opt_reserve_root:
 703                         if (args->from && match_int(args, &arg))
 704                                 return -EINVAL;
 705                         if (test_opt(sbi, RESERVE_ROOT)) {
 706                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 707                                           F2FS_OPTION(sbi).root_reserved_blocks);
 708                         } else {
 709                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 710                                 set_opt(sbi, RESERVE_ROOT);
 711                         }
 712                         break;
 713                 case Opt_resuid:
 714                         if (args->from && match_int(args, &arg))
 715                                 return -EINVAL;
 716                         uid = make_kuid(current_user_ns(), arg);
 717                         if (!uid_valid(uid)) {
 718                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 719                                 return -EINVAL;
 720                         }
 721                         F2FS_OPTION(sbi).s_resuid = uid;
 722                         break;
 723                 case Opt_resgid:
 724                         if (args->from && match_int(args, &arg))
 725                                 return -EINVAL;
 726                         gid = make_kgid(current_user_ns(), arg);
 727                         if (!gid_valid(gid)) {
 728                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 729                                 return -EINVAL;
 730                         }
 731                         F2FS_OPTION(sbi).s_resgid = gid;
 732                         break;
 733                 case Opt_mode:
 734                         name = match_strdup(&args[0]);
 735
 736                         if (!name)
 737                                 return -ENOMEM;
 738                         if (!strcmp(name, "adaptive")) {
 739                                 if (f2fs_sb_has_blkzoned(sbi)) {
 740                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 741                                         kfree(name);
 742                                         return -EINVAL;
 743                                 }
 744                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 745                         } else if (!strcmp(name, "lfs")) {
 746                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 747                         } else {
 748                                 kfree(name);
 749                                 return -EINVAL;
 750                         }
 751                         kfree(name);
 752                         break;
 753                 case Opt_io_size_bits:
 754                         if (args->from && match_int(args, &arg))
 755                                 return -EINVAL;
 756                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
 757                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 758                                           1 << arg, BIO_MAX_PAGES);
 759                                 return -EINVAL;
 760                         }
 761                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 762                         break;
 763 #ifdef CONFIG_F2FS_FAULT_INJECTION
 764                 case Opt_fault_injection:
 765                         if (args->from && match_int(args, &arg))
 766                                 return -EINVAL;
 767                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 768                         set_opt(sbi, FAULT_INJECTION);
 769                         break;
 770
 771                 case Opt_fault_type:
 772                         if (args->from && match_int(args, &arg))
 773                                 return -EINVAL;
 774                         f2fs_build_fault_attr(sbi, 0, arg);
 775                         set_opt(sbi, FAULT_INJECTION);
 776                         break;
 777 #else
 778                 case Opt_fault_injection:
 779                         f2fs_info(sbi, "fault_injection options not supported");
 780                         break;
 781
 782                 case Opt_fault_type:
 783                         f2fs_info(sbi, "fault_type options not supported");
 784                         break;
 785 #endif
 786                 case Opt_lazytime:
 787                         sb->s_flags |= SB_LAZYTIME;
 788                         break;
 789                 case Opt_nolazytime:
 790                         sb->s_flags &= ~SB_LAZYTIME;
 791                         break;
 792 #ifdef CONFIG_QUOTA
 793                 case Opt_quota:
 794                 case Opt_usrquota:
 795                         set_opt(sbi, USRQUOTA);
 796                         break;
 797                 case Opt_grpquota:
 798                         set_opt(sbi, GRPQUOTA);
 799                         break;
 800                 case Opt_prjquota:
 801                         set_opt(sbi, PRJQUOTA);
 802                         break;
 803                 case Opt_usrjquota:
 804                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 805                         if (ret)
 806                                 return ret;
 807                         break;
 808                 case Opt_grpjquota:
 809                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 810                         if (ret)
 811                                 return ret;
 812                         break;
 813                 case Opt_prjjquota:
 814                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 815                         if (ret)
 816                                 return ret;
 817                         break;
 818                 case Opt_offusrjquota:
 819                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 820                         if (ret)
 821                                 return ret;
 822                         break;
 823                 case Opt_offgrpjquota:
 824                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 825                         if (ret)
 826                                 return ret;
 827                         break;
 828                 case Opt_offprjjquota:
 829                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 830                         if (ret)
 831                                 return ret;
 832                         break;
 833                 case Opt_jqfmt_vfsold:
 834                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 835                         break;
 836                 case Opt_jqfmt_vfsv0:
 837                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 838                         break;
 839                 case Opt_jqfmt_vfsv1:
 840                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 841                         break;
 842                 case Opt_noquota:
 843                         clear_opt(sbi, QUOTA);
 844                         clear_opt(sbi, USRQUOTA);
 845                         clear_opt(sbi, GRPQUOTA);
 846                         clear_opt(sbi, PRJQUOTA);
 847                         break;
 848 #else
 849                 case Opt_quota:
 850                 case Opt_usrquota:
 851                 case Opt_grpquota:
 852                 case Opt_prjquota:
 853                 case Opt_usrjquota:
 854                 case Opt_grpjquota:
 855                 case Opt_prjjquota:
 856                 case Opt_offusrjquota:
 857                 case Opt_offgrpjquota:
 858                 case Opt_offprjjquota:
 859                 case Opt_jqfmt_vfsold:
 860                 case Opt_jqfmt_vfsv0:
 861                 case Opt_jqfmt_vfsv1:
 862                 case Opt_noquota:
 863                         f2fs_info(sbi, "quota operations not supported");
 864                         break;
 865 #endif
 866                 case Opt_whint:
 867                         name = match_strdup(&args[0]);
 868                         if (!name)
 869                                 return -ENOMEM;
 870                         if (!strcmp(name, "user-based")) {
 871                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 872                         } else if (!strcmp(name, "off")) {
 873                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 874                         } else if (!strcmp(name, "fs-based")) {
 875                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 876                         } else {
 877                                 kfree(name);
 878                                 return -EINVAL;
 879                         }
 880                         kfree(name);
 881                         break;
 882                 case Opt_alloc:
 883                         name = match_strdup(&args[0]);
 884                         if (!name)
 885                                 return -ENOMEM;
 886
 887                         if (!strcmp(name, "default")) {
 888                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 889                         } else if (!strcmp(name, "reuse")) {
 890                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 891                         } else {
 892                                 kfree(name);
 893                                 return -EINVAL;
 894                         }
 895                         kfree(name);
 896                         break;
 897                 case Opt_fsync:
 898                         name = match_strdup(&args[0]);
 899                         if (!name)
 900                                 return -ENOMEM;
 901                         if (!strcmp(name, "posix")) {
 902                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 903                         } else if (!strcmp(name, "strict")) {
 904                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 905                         } else if (!strcmp(name, "nobarrier")) {
 906                                 F2FS_OPTION(sbi).fsync_mode =
 907                                                         FSYNC_MODE_NOBARRIER;
 908                         } else {
 909                                 kfree(name);
 910                                 return -EINVAL;
 911                         }
 912                         kfree(name);
 913                         break;
 914                 case Opt_test_dummy_encryption:
 915                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 916                                                              is_remount);
 917                         if (ret)
 918                                 return ret;
 919                         break;
 920                 case Opt_inlinecrypt:
 921 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
 922                         sb->s_flags |= SB_INLINECRYPT;
 923 #else
 924                         f2fs_info(sbi, "inline encryption not supported");
 925 #endif
 926                         break;
 927                 case Opt_checkpoint_disable_cap_perc:
 928                         if (args->from && match_int(args, &arg))
 929                                 return -EINVAL;
 930                         if (arg < 0 || arg > 100)
 931                                 return -EINVAL;
 932                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
 933                         set_opt(sbi, DISABLE_CHECKPOINT);
 934                         break;
 935                 case Opt_checkpoint_disable_cap:
 936                         if (args->from && match_int(args, &arg))
 937                                 return -EINVAL;
 938                         F2FS_OPTION(sbi).unusable_cap = arg;
 939                         set_opt(sbi, DISABLE_CHECKPOINT);
 940                         break;
 941                 case Opt_checkpoint_disable:
 942                         set_opt(sbi, DISABLE_CHECKPOINT);
 943                         break;
 944                 case Opt_checkpoint_enable:
 945                         clear_opt(sbi, DISABLE_CHECKPOINT);
 946                         break;
 947                 case Opt_checkpoint_merge:
 948                         set_opt(sbi, MERGE_CHECKPOINT);
 949                         break;
 950                 case Opt_nocheckpoint_merge:
 951                         clear_opt(sbi, MERGE_CHECKPOINT);
 952                         break;
 953 #ifdef CONFIG_F2FS_FS_COMPRESSION
 954                 case Opt_compress_algorithm:
 955                         if (!f2fs_sb_has_compression(sbi)) {
 956                                 f2fs_info(sbi, "Image doesn't support compression");
 957                                 break;
 958                         }
 959                         name = match_strdup(&args[0]);
 960                         if (!name)
 961                                 return -ENOMEM;
 962                         if (!strcmp(name, "lzo")) {
 963 #ifdef CONFIG_F2FS_FS_LZO
 964                                 F2FS_OPTION(sbi).compress_level = 0;
 965                                 F2FS_OPTION(sbi).compress_algorithm =
 966                                                                 COMPRESS_LZO;
 967 #else
 968                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
 969 #endif
 970                         } else if (!strncmp(name, "lz4", 3)) {
 971 #ifdef CONFIG_F2FS_FS_LZ4
 972                                 ret = f2fs_set_lz4hc_level(sbi, name);
 973                                 if (ret) {
 974                                         kfree(name);
 975                                         return -EINVAL;
 976                                 }
 977                                 F2FS_OPTION(sbi).compress_algorithm =
 978                                                                 COMPRESS_LZ4;
 979 #else
 980                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
 981 #endif
 982                         } else if (!strncmp(name, "zstd", 4)) {
 983 #ifdef CONFIG_F2FS_FS_ZSTD
 984                                 ret = f2fs_set_zstd_level(sbi, name);
 985                                 if (ret) {
 986                                         kfree(name);
 987                                         return -EINVAL;
 988                                 }
 989                                 F2FS_OPTION(sbi).compress_algorithm =
 990                                                                 COMPRESS_ZSTD;
 991 #else
 992                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
 993 #endif
 994                         } else if (!strcmp(name, "lzo-rle")) {
 995 #ifdef CONFIG_F2FS_FS_LZORLE
 996                                 F2FS_OPTION(sbi).compress_level = 0;
 997                                 F2FS_OPTION(sbi).compress_algorithm =
 998                                                                 COMPRESS_LZORLE;
 999 #else
1000                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1001 #endif
1002                         } else {
1003                                 kfree(name);
1004                                 return -EINVAL;
1005                         }
1006                         kfree(name);
1007                         break;
1008                 case Opt_compress_log_size:
1009                         if (!f2fs_sb_has_compression(sbi)) {
1010                                 f2fs_info(sbi, "Image doesn't support compression");
1011                                 break;
1012                         }
1013                         if (args->from && match_int(args, &arg))
1014                                 return -EINVAL;
1015                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1016                                 arg > MAX_COMPRESS_LOG_SIZE) {
1017                                 f2fs_err(sbi,
1018                                         "Compress cluster log size is out of range");
1019                                 return -EINVAL;
1020                         }
1021                         F2FS_OPTION(sbi).compress_log_size = arg;
1022                         break;
1023                 case Opt_compress_extension:
1024                         if (!f2fs_sb_has_compression(sbi)) {
1025                                 f2fs_info(sbi, "Image doesn't support compression");
1026                                 break;
1027                         }
1028                         name = match_strdup(&args[0]);
1029                         if (!name)
1030                                 return -ENOMEM;
1031
1032                         ext = F2FS_OPTION(sbi).extensions;
1033                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1034
1035                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1036                                 ext_cnt >= COMPRESS_EXT_NUM) {
1037                                 f2fs_err(sbi,
1038                                         "invalid extension length/number");
1039                                 kfree(name);
1040                                 return -EINVAL;
1041                         }
1042
1043                         strcpy(ext[ext_cnt], name);
1044                         F2FS_OPTION(sbi).compress_ext_cnt++;
1045                         kfree(name);
1046                         break;
1047                 case Opt_compress_chksum:
1048                         F2FS_OPTION(sbi).compress_chksum = true;
1049                         break;
1050                 case Opt_compress_mode:
1051                         name = match_strdup(&args[0]);
1052                         if (!name)
1053                                 return -ENOMEM;
1054                         if (!strcmp(name, "fs")) {
1055                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1056                         } else if (!strcmp(name, "user")) {
1057                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1058                         } else {
1059                                 kfree(name);
1060                                 return -EINVAL;
1061                         }
1062                         kfree(name);
1063                         break;
1064 #else
1065                 case Opt_compress_algorithm:
1066                 case Opt_compress_log_size:
1067                 case Opt_compress_extension:
1068                 case Opt_compress_chksum:
1069                 case Opt_compress_mode:
1070                         f2fs_info(sbi, "compression options not supported");
1071                         break;
1072 #endif
1073                 case Opt_atgc:
1074                         set_opt(sbi, ATGC);
1075                         break;
1076                 default:
1077                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1078                                  p);
1079                         return -EINVAL;
1080                 }
1081         }
1082 #ifdef CONFIG_QUOTA
1083         if (f2fs_check_quota_options(sbi))
1084                 return -EINVAL;
1085 #else
1086         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1087                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1088                 return -EINVAL;
1089         }
1090         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1091                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1092                 return -EINVAL;
1093         }
1094 #endif
1095 #ifndef CONFIG_UNICODE
1096         if (f2fs_sb_has_casefold(sbi)) {
1097                 f2fs_err(sbi,
1098                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1099                 return -EINVAL;
1100         }
1101 #endif
1102         /*
1103          * The BLKZONED feature indicates that the drive was formatted with
1104          * zone alignment optimization. This is optional for host-aware
1105          * devices, but mandatory for host-managed zoned block devices.
1106          */
1107 #ifndef CONFIG_BLK_DEV_ZONED
1108         if (f2fs_sb_has_blkzoned(sbi)) {
1109                 f2fs_err(sbi, "Zoned block device support is not enabled");
1110                 return -EINVAL;
1111         }
1112 #endif
1113
1114         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1115                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1116                          F2FS_IO_SIZE_KB(sbi));
1117                 return -EINVAL;
1118         }
1119
1120         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1121                 int min_size, max_size;
1122
1123                 if (!f2fs_sb_has_extra_attr(sbi) ||
1124                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1125                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1126                         return -EINVAL;
1127                 }
1128                 if (!test_opt(sbi, INLINE_XATTR)) {
1129                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1130                         return -EINVAL;
1131                 }
1132
1133                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1134                 max_size = MAX_INLINE_XATTR_SIZE;
1135
1136                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1137                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1138                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1139                                  min_size, max_size);
1140                         return -EINVAL;
1141                 }
1142         }
1143
1144         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1145                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
1146                 return -EINVAL;
1147         }
1148
1149         /* Not pass down write hints if the number of active logs is lesser
1150          * than NR_CURSEG_PERSIST_TYPE.
1151          */
1152         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
1153                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1154         return 0;
1155 }
1156
1157 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1158 {
1159         struct f2fs_inode_info *fi;
1160
1161         fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
1162         if (!fi)
1163                 return NULL;
1164
1165         init_once((void *) fi);
1166
1167         /* Initialize f2fs-specific inode info */
1168         atomic_set(&fi->dirty_pages, 0);
1169         atomic_set(&fi->i_compr_blocks, 0);
1170         init_rwsem(&fi->i_sem);
1171         spin_lock_init(&fi->i_size_lock);
1172         INIT_LIST_HEAD(&fi->dirty_list);
1173         INIT_LIST_HEAD(&fi->gdirty_list);
1174         INIT_LIST_HEAD(&fi->inmem_ilist);
1175         INIT_LIST_HEAD(&fi->inmem_pages);
1176         mutex_init(&fi->inmem_lock);
1177         init_rwsem(&fi->i_gc_rwsem[READ]);
1178         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1179         init_rwsem(&fi->i_mmap_sem);
1180         init_rwsem(&fi->i_xattr_sem);
1181
1182         /* Will be used by directory only */
1183         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1184
1185         return &fi->vfs_inode;
1186 }
1187
1188 static int f2fs_drop_inode(struct inode *inode)
1189 {
1190         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1191         int ret;
1192
1193         /*
1194          * during filesystem shutdown, if checkpoint is disabled,
1195          * drop useless meta/node dirty pages.
1196          */
1197         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1198                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1199                         inode->i_ino == F2FS_META_INO(sbi)) {
1200                         trace_f2fs_drop_inode(inode, 1);
1201                         return 1;
1202                 }
1203         }
1204
1205         /*
1206          * This is to avoid a deadlock condition like below.
1207          * writeback_single_inode(inode)
1208          *  - f2fs_write_data_page
1209          *    - f2fs_gc -> iput -> evict
1210          *       - inode_wait_for_writeback(inode)
1211          */
1212         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1213                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1214                         /* to avoid evict_inode call simultaneously */
1215                         atomic_inc(&inode->i_count);
1216                         spin_unlock(&inode->i_lock);
1217
1218                         /* some remained atomic pages should discarded */
1219                         if (f2fs_is_atomic_file(inode))
1220                                 f2fs_drop_inmem_pages(inode);
1221
1222                         /* should remain fi->extent_tree for writepage */
1223                         f2fs_destroy_extent_node(inode);
1224
1225                         sb_start_intwrite(inode->i_sb);
1226                         f2fs_i_size_write(inode, 0);
1227
1228                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1229                                         inode, NULL, 0, DATA);
1230                         truncate_inode_pages_final(inode->i_mapping);
1231
1232                         if (F2FS_HAS_BLOCKS(inode))
1233                                 f2fs_truncate(inode);
1234
1235                         sb_end_intwrite(inode->i_sb);
1236
1237                         spin_lock(&inode->i_lock);
1238                         atomic_dec(&inode->i_count);
1239                 }
1240                 trace_f2fs_drop_inode(inode, 0);
1241                 return 0;
1242         }
1243         ret = generic_drop_inode(inode);
1244         if (!ret)
1245                 ret = fscrypt_drop_inode(inode);
1246         trace_f2fs_drop_inode(inode, ret);
1247         return ret;
1248 }
1249
1250 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1251 {
1252         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1253         int ret = 0;
1254
1255         spin_lock(&sbi->inode_lock[DIRTY_META]);
1256         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1257                 ret = 1;
1258         } else {
1259                 set_inode_flag(inode, FI_DIRTY_INODE);
1260                 stat_inc_dirty_inode(sbi, DIRTY_META);
1261         }
1262         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1263                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1264                                 &sbi->inode_list[DIRTY_META]);
1265                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1266         }
1267         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1268         return ret;
1269 }
1270
1271 void f2fs_inode_synced(struct inode *inode)
1272 {
1273         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1274
1275         spin_lock(&sbi->inode_lock[DIRTY_META]);
1276         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1277                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1278                 return;
1279         }
1280         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1281                 list_del_init(&F2FS_I(inode)->gdirty_list);
1282                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1283         }
1284         clear_inode_flag(inode, FI_DIRTY_INODE);
1285         clear_inode_flag(inode, FI_AUTO_RECOVER);
1286         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1287         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1288 }
1289
1290 /*
1291  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1292  *
1293  * We should call set_dirty_inode to write the dirty inode through write_inode.
1294  */
1295 static void f2fs_dirty_inode(struct inode *inode, int flags)
1296 {
1297         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1298
1299         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1300                         inode->i_ino == F2FS_META_INO(sbi))
1301                 return;
1302
1303         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1304                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1305
1306         f2fs_inode_dirtied(inode, false);
1307 }
1308
1309 static void f2fs_free_inode(struct inode *inode)
1310 {
1311         fscrypt_free_inode(inode);
1312         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1313 }
1314
1315 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1316 {
1317         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1318         percpu_counter_destroy(&sbi->total_valid_inode_count);
1319 }
1320
1321 static void destroy_device_list(struct f2fs_sb_info *sbi)
1322 {
1323         int i;
1324
1325         for (i = 0; i < sbi->s_ndevs; i++) {
1326                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1327 #ifdef CONFIG_BLK_DEV_ZONED
1328                 kvfree(FDEV(i).blkz_seq);
1329                 kfree(FDEV(i).zone_capacity_blocks);
1330 #endif
1331         }
1332         kvfree(sbi->devs);
1333 }
1334
1335 static void f2fs_put_super(struct super_block *sb)
1336 {
1337         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1338         int i;
1339         bool dropped;
1340
1341         /* unregister procfs/sysfs entries in advance to avoid race case */
1342         f2fs_unregister_sysfs(sbi);
1343
1344         f2fs_quota_off_umount(sb);
1345
1346         /* prevent remaining shrinker jobs */
1347         mutex_lock(&sbi->umount_mutex);
1348
1349         /*
1350          * flush all issued checkpoints and stop checkpoint issue thread.
1351          * after then, all checkpoints should be done by each process context.
1352          */
1353         f2fs_stop_ckpt_thread(sbi);
1354
1355         /*
1356          * We don't need to do checkpoint when superblock is clean.
1357          * But, the previous checkpoint was not done by umount, it needs to do
1358          * clean checkpoint again.
1359          */
1360         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1361                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1362                 struct cp_control cpc = {
1363                         .reason = CP_UMOUNT,
1364                 };
1365                 f2fs_write_checkpoint(sbi, &cpc);
1366         }
1367
1368         /* be sure to wait for any on-going discard commands */
1369         dropped = f2fs_issue_discard_timeout(sbi);
1370
1371         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1372                                         !sbi->discard_blks && !dropped) {
1373                 struct cp_control cpc = {
1374                         .reason = CP_UMOUNT | CP_TRIMMED,
1375                 };
1376                 f2fs_write_checkpoint(sbi, &cpc);
1377         }
1378
1379         /*
1380          * normally superblock is clean, so we need to release this.
1381          * In addition, EIO will skip do checkpoint, we need this as well.
1382          */
1383         f2fs_release_ino_entry(sbi, true);
1384
1385         f2fs_leave_shrinker(sbi);
1386         mutex_unlock(&sbi->umount_mutex);
1387
1388         /* our cp_error case, we can wait for any writeback page */
1389         f2fs_flush_merged_writes(sbi);
1390
1391         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1392
1393         f2fs_bug_on(sbi, sbi->fsync_node_num);
1394
1395         iput(sbi->node_inode);
1396         sbi->node_inode = NULL;
1397
1398         iput(sbi->meta_inode);
1399         sbi->meta_inode = NULL;
1400
1401         /*
1402          * iput() can update stat information, if f2fs_write_checkpoint()
1403          * above failed with error.
1404          */
1405         f2fs_destroy_stats(sbi);
1406
1407         /* destroy f2fs internal modules */
1408         f2fs_destroy_node_manager(sbi);
1409         f2fs_destroy_segment_manager(sbi);
1410
1411         f2fs_destroy_post_read_wq(sbi);
1412
1413         kvfree(sbi->ckpt);
1414
1415         sb->s_fs_info = NULL;
1416         if (sbi->s_chksum_driver)
1417                 crypto_free_shash(sbi->s_chksum_driver);
1418         kfree(sbi->raw_super);
1419
1420         destroy_device_list(sbi);
1421         f2fs_destroy_page_array_cache(sbi);
1422         f2fs_destroy_xattr_caches(sbi);
1423         mempool_destroy(sbi->write_io_dummy);
1424 #ifdef CONFIG_QUOTA
1425         for (i = 0; i < MAXQUOTAS; i++)
1426                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1427 #endif
1428         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1429         destroy_percpu_info(sbi);
1430         for (i = 0; i < NR_PAGE_TYPE; i++)
1431                 kvfree(sbi->write_io[i]);
1432 #ifdef CONFIG_UNICODE
1433         utf8_unload(sb->s_encoding);
1434 #endif
1435         kfree(sbi);
1436 }
1437
1438 int f2fs_sync_fs(struct super_block *sb, int sync)
1439 {
1440         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1441         int err = 0;
1442
1443         if (unlikely(f2fs_cp_error(sbi)))
1444                 return 0;
1445         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1446                 return 0;
1447
1448         trace_f2fs_sync_fs(sb, sync);
1449
1450         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1451                 return -EAGAIN;
1452
1453         if (sync)
1454                 err = f2fs_issue_checkpoint(sbi);
1455
1456         return err;
1457 }
1458
1459 static int f2fs_freeze(struct super_block *sb)
1460 {
1461         if (f2fs_readonly(sb))
1462                 return 0;
1463
1464         /* IO error happened before */
1465         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1466                 return -EIO;
1467
1468         /* must be clean, since sync_filesystem() was already called */
1469         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1470                 return -EINVAL;
1471
1472         /* ensure no checkpoint required */
1473         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1474                 return -EINVAL;
1475         return 0;
1476 }
1477
1478 static int f2fs_unfreeze(struct super_block *sb)
1479 {
1480         return 0;
1481 }
1482
1483 #ifdef CONFIG_QUOTA
1484 static int f2fs_statfs_project(struct super_block *sb,
1485                                 kprojid_t projid, struct kstatfs *buf)
1486 {
1487         struct kqid qid;
1488         struct dquot *dquot;
1489         u64 limit;
1490         u64 curblock;
1491
1492         qid = make_kqid_projid(projid);
1493         dquot = dqget(sb, qid);
1494         if (IS_ERR(dquot))
1495                 return PTR_ERR(dquot);
1496         spin_lock(&dquot->dq_dqb_lock);
1497
1498         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1499                                         dquot->dq_dqb.dqb_bhardlimit);
1500         if (limit)
1501                 limit >>= sb->s_blocksize_bits;
1502
1503         if (limit && buf->f_blocks > limit) {
1504                 curblock = (dquot->dq_dqb.dqb_curspace +
1505                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1506                 buf->f_blocks = limit;
1507                 buf->f_bfree = buf->f_bavail =
1508                         (buf->f_blocks > curblock) ?
1509                          (buf->f_blocks - curblock) : 0;
1510         }
1511
1512         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1513                                         dquot->dq_dqb.dqb_ihardlimit);
1514
1515         if (limit && buf->f_files > limit) {
1516                 buf->f_files = limit;
1517                 buf->f_ffree =
1518                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1519                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1520         }
1521
1522         spin_unlock(&dquot->dq_dqb_lock);
1523         dqput(dquot);
1524         return 0;
1525 }
1526 #endif
1527
1528 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1529 {
1530         struct super_block *sb = dentry->d_sb;
1531         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1532         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1533         block_t total_count, user_block_count, start_count;
1534         u64 avail_node_count;
1535
1536         total_count = le64_to_cpu(sbi->raw_super->block_count);
1537         user_block_count = sbi->user_block_count;
1538         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1539         buf->f_type = F2FS_SUPER_MAGIC;
1540         buf->f_bsize = sbi->blocksize;
1541
1542         buf->f_blocks = total_count - start_count;
1543         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1544                                                 sbi->current_reserved_blocks;
1545
1546         spin_lock(&sbi->stat_lock);
1547         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1548                 buf->f_bfree = 0;
1549         else
1550                 buf->f_bfree -= sbi->unusable_block_count;
1551         spin_unlock(&sbi->stat_lock);
1552
1553         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1554                 buf->f_bavail = buf->f_bfree -
1555                                 F2FS_OPTION(sbi).root_reserved_blocks;
1556         else
1557                 buf->f_bavail = 0;
1558
1559         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1560
1561         if (avail_node_count > user_block_count) {
1562                 buf->f_files = user_block_count;
1563                 buf->f_ffree = buf->f_bavail;
1564         } else {
1565                 buf->f_files = avail_node_count;
1566                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1567                                         buf->f_bavail);
1568         }
1569
1570         buf->f_namelen = F2FS_NAME_LEN;
1571         buf->f_fsid    = u64_to_fsid(id);
1572
1573 #ifdef CONFIG_QUOTA
1574         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1575                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1576                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1577         }
1578 #endif
1579         return 0;
1580 }
1581
1582 static inline void f2fs_show_quota_options(struct seq_file *seq,
1583                                            struct super_block *sb)
1584 {
1585 #ifdef CONFIG_QUOTA
1586         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1587
1588         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1589                 char *fmtname = "";
1590
1591                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1592                 case QFMT_VFS_OLD:
1593                         fmtname = "vfsold";
1594                         break;
1595                 case QFMT_VFS_V0:
1596                         fmtname = "vfsv0";
1597                         break;
1598                 case QFMT_VFS_V1:
1599                         fmtname = "vfsv1";
1600                         break;
1601                 }
1602                 seq_printf(seq, ",jqfmt=%s", fmtname);
1603         }
1604
1605         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1606                 seq_show_option(seq, "usrjquota",
1607                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1608
1609         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1610                 seq_show_option(seq, "grpjquota",
1611                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1612
1613         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1614                 seq_show_option(seq, "prjjquota",
1615                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1616 #endif
1617 }
1618
1619 static inline void f2fs_show_compress_options(struct seq_file *seq,
1620                                                         struct super_block *sb)
1621 {
1622         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1623         char *algtype = "";
1624         int i;
1625
1626         if (!f2fs_sb_has_compression(sbi))
1627                 return;
1628
1629         switch (F2FS_OPTION(sbi).compress_algorithm) {
1630         case COMPRESS_LZO:
1631                 algtype = "lzo";
1632                 break;
1633         case COMPRESS_LZ4:
1634                 algtype = "lz4";
1635                 break;
1636         case COMPRESS_ZSTD:
1637                 algtype = "zstd";
1638                 break;
1639         case COMPRESS_LZORLE:
1640                 algtype = "lzo-rle";
1641                 break;
1642         }
1643         seq_printf(seq, ",compress_algorithm=%s", algtype);
1644
1645         if (F2FS_OPTION(sbi).compress_level)
1646                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1647
1648         seq_printf(seq, ",compress_log_size=%u",
1649                         F2FS_OPTION(sbi).compress_log_size);
1650
1651         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1652                 seq_printf(seq, ",compress_extension=%s",
1653                         F2FS_OPTION(sbi).extensions[i]);
1654         }
1655
1656         if (F2FS_OPTION(sbi).compress_chksum)
1657                 seq_puts(seq, ",compress_chksum");
1658
1659         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1660                 seq_printf(seq, ",compress_mode=%s", "fs");
1661         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1662                 seq_printf(seq, ",compress_mode=%s", "user");
1663 }
1664
1665 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1666 {
1667         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1668
1669         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1670                 seq_printf(seq, ",background_gc=%s", "sync");
1671         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1672                 seq_printf(seq, ",background_gc=%s", "on");
1673         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1674                 seq_printf(seq, ",background_gc=%s", "off");
1675
1676         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1677                 seq_puts(seq, ",disable_roll_forward");
1678         if (test_opt(sbi, NORECOVERY))
1679                 seq_puts(seq, ",norecovery");
1680         if (test_opt(sbi, DISCARD))
1681                 seq_puts(seq, ",discard");
1682         else
1683                 seq_puts(seq, ",nodiscard");
1684         if (test_opt(sbi, NOHEAP))
1685                 seq_puts(seq, ",no_heap");
1686         else
1687                 seq_puts(seq, ",heap");
1688 #ifdef CONFIG_F2FS_FS_XATTR
1689         if (test_opt(sbi, XATTR_USER))
1690                 seq_puts(seq, ",user_xattr");
1691         else
1692                 seq_puts(seq, ",nouser_xattr");
1693         if (test_opt(sbi, INLINE_XATTR))
1694                 seq_puts(seq, ",inline_xattr");
1695         else
1696                 seq_puts(seq, ",noinline_xattr");
1697         if (test_opt(sbi, INLINE_XATTR_SIZE))
1698                 seq_printf(seq, ",inline_xattr_size=%u",
1699                                         F2FS_OPTION(sbi).inline_xattr_size);
1700 #endif
1701 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1702         if (test_opt(sbi, POSIX_ACL))
1703                 seq_puts(seq, ",acl");
1704         else
1705                 seq_puts(seq, ",noacl");
1706 #endif
1707         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1708                 seq_puts(seq, ",disable_ext_identify");
1709         if (test_opt(sbi, INLINE_DATA))
1710                 seq_puts(seq, ",inline_data");
1711         else
1712                 seq_puts(seq, ",noinline_data");
1713         if (test_opt(sbi, INLINE_DENTRY))
1714                 seq_puts(seq, ",inline_dentry");
1715         else
1716                 seq_puts(seq, ",noinline_dentry");
1717         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1718                 seq_puts(seq, ",flush_merge");
1719         if (test_opt(sbi, NOBARRIER))
1720                 seq_puts(seq, ",nobarrier");
1721         if (test_opt(sbi, FASTBOOT))
1722                 seq_puts(seq, ",fastboot");
1723         if (test_opt(sbi, EXTENT_CACHE))
1724                 seq_puts(seq, ",extent_cache");
1725         else
1726                 seq_puts(seq, ",noextent_cache");
1727         if (test_opt(sbi, DATA_FLUSH))
1728                 seq_puts(seq, ",data_flush");
1729
1730         seq_puts(seq, ",mode=");
1731         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1732                 seq_puts(seq, "adaptive");
1733         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1734                 seq_puts(seq, "lfs");
1735         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1736         if (test_opt(sbi, RESERVE_ROOT))
1737                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1738                                 F2FS_OPTION(sbi).root_reserved_blocks,
1739                                 from_kuid_munged(&init_user_ns,
1740                                         F2FS_OPTION(sbi).s_resuid),
1741                                 from_kgid_munged(&init_user_ns,
1742                                         F2FS_OPTION(sbi).s_resgid));
1743         if (F2FS_IO_SIZE_BITS(sbi))
1744                 seq_printf(seq, ",io_bits=%u",
1745                                 F2FS_OPTION(sbi).write_io_size_bits);
1746 #ifdef CONFIG_F2FS_FAULT_INJECTION
1747         if (test_opt(sbi, FAULT_INJECTION)) {
1748                 seq_printf(seq, ",fault_injection=%u",
1749                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1750                 seq_printf(seq, ",fault_type=%u",
1751                                 F2FS_OPTION(sbi).fault_info.inject_type);
1752         }
1753 #endif
1754 #ifdef CONFIG_QUOTA
1755         if (test_opt(sbi, QUOTA))
1756                 seq_puts(seq, ",quota");
1757         if (test_opt(sbi, USRQUOTA))
1758                 seq_puts(seq, ",usrquota");
1759         if (test_opt(sbi, GRPQUOTA))
1760                 seq_puts(seq, ",grpquota");
1761         if (test_opt(sbi, PRJQUOTA))
1762                 seq_puts(seq, ",prjquota");
1763 #endif
1764         f2fs_show_quota_options(seq, sbi->sb);
1765         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1766                 seq_printf(seq, ",whint_mode=%s", "user-based");
1767         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1768                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1769
1770         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1771
1772         if (sbi->sb->s_flags & SB_INLINECRYPT)
1773                 seq_puts(seq, ",inlinecrypt");
1774
1775         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1776                 seq_printf(seq, ",alloc_mode=%s", "default");
1777         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1778                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1779
1780         if (test_opt(sbi, DISABLE_CHECKPOINT))
1781                 seq_printf(seq, ",checkpoint=disable:%u",
1782                                 F2FS_OPTION(sbi).unusable_cap);
1783         if (test_opt(sbi, MERGE_CHECKPOINT))
1784                 seq_puts(seq, ",checkpoint_merge");
1785         else
1786                 seq_puts(seq, ",nocheckpoint_merge");
1787         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1788                 seq_printf(seq, ",fsync_mode=%s", "posix");
1789         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1790                 seq_printf(seq, ",fsync_mode=%s", "strict");
1791         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1792                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1793
1794 #ifdef CONFIG_F2FS_FS_COMPRESSION
1795         f2fs_show_compress_options(seq, sbi->sb);
1796 #endif
1797
1798         if (test_opt(sbi, ATGC))
1799                 seq_puts(seq, ",atgc");
1800         return 0;
1801 }
1802
1803 static void default_options(struct f2fs_sb_info *sbi)
1804 {
1805         /* init some FS parameters */
1806         F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
1807         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1808         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1809         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1810         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1811         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1812         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1813         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1814         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1815         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1816         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1817         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1818
1819         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1820
1821         set_opt(sbi, INLINE_XATTR);
1822         set_opt(sbi, INLINE_DATA);
1823         set_opt(sbi, INLINE_DENTRY);
1824         set_opt(sbi, EXTENT_CACHE);
1825         set_opt(sbi, NOHEAP);
1826         clear_opt(sbi, DISABLE_CHECKPOINT);
1827         F2FS_OPTION(sbi).unusable_cap = 0;
1828         sbi->sb->s_flags |= SB_LAZYTIME;
1829         set_opt(sbi, FLUSH_MERGE);
1830         set_opt(sbi, DISCARD);
1831         if (f2fs_sb_has_blkzoned(sbi))
1832                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
1833         else
1834                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
1835
1836 #ifdef CONFIG_F2FS_FS_XATTR
1837         set_opt(sbi, XATTR_USER);
1838 #endif
1839 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1840         set_opt(sbi, POSIX_ACL);
1841 #endif
1842
1843         f2fs_build_fault_attr(sbi, 0, 0);
1844 }
1845
1846 #ifdef CONFIG_QUOTA
1847 static int f2fs_enable_quotas(struct super_block *sb);
1848 #endif
1849
1850 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1851 {
1852         unsigned int s_flags = sbi->sb->s_flags;
1853         struct cp_control cpc;
1854         int err = 0;
1855         int ret;
1856         block_t unusable;
1857
1858         if (s_flags & SB_RDONLY) {
1859                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1860                 return -EINVAL;
1861         }
1862         sbi->sb->s_flags |= SB_ACTIVE;
1863
1864         f2fs_update_time(sbi, DISABLE_TIME);
1865
1866         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1867                 down_write(&sbi->gc_lock);
1868                 err = f2fs_gc(sbi, true, false, NULL_SEGNO);
1869                 if (err == -ENODATA) {
1870                         err = 0;
1871                         break;
1872                 }
1873                 if (err && err != -EAGAIN)
1874                         break;
1875         }
1876
1877         ret = sync_filesystem(sbi->sb);
1878         if (ret || err) {
1879                 err = ret ? ret: err;
1880                 goto restore_flag;
1881         }
1882
1883         unusable = f2fs_get_unusable_blocks(sbi);
1884         if (f2fs_disable_cp_again(sbi, unusable)) {
1885                 err = -EAGAIN;
1886                 goto restore_flag;
1887         }
1888
1889         down_write(&sbi->gc_lock);
1890         cpc.reason = CP_PAUSE;
1891         set_sbi_flag(sbi, SBI_CP_DISABLED);
1892         err = f2fs_write_checkpoint(sbi, &cpc);
1893         if (err)
1894                 goto out_unlock;
1895
1896         spin_lock(&sbi->stat_lock);
1897         sbi->unusable_block_count = unusable;
1898         spin_unlock(&sbi->stat_lock);
1899
1900 out_unlock:
1901         up_write(&sbi->gc_lock);
1902 restore_flag:
1903         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
1904         return err;
1905 }
1906
1907 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1908 {
1909         /* we should flush all the data to keep data consistency */
1910         sync_inodes_sb(sbi->sb);
1911
1912         down_write(&sbi->gc_lock);
1913         f2fs_dirty_to_prefree(sbi);
1914
1915         clear_sbi_flag(sbi, SBI_CP_DISABLED);
1916         set_sbi_flag(sbi, SBI_IS_DIRTY);
1917         up_write(&sbi->gc_lock);
1918
1919         f2fs_sync_fs(sbi->sb, 1);
1920 }
1921
1922 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1923 {
1924         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1925         struct f2fs_mount_info org_mount_opt;
1926         unsigned long old_sb_flags;
1927         int err;
1928         bool need_restart_gc = false;
1929         bool need_stop_gc = false;
1930         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1931         bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1932         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
1933         bool no_atgc = !test_opt(sbi, ATGC);
1934         bool checkpoint_changed;
1935 #ifdef CONFIG_QUOTA
1936         int i, j;
1937 #endif
1938
1939         /*
1940          * Save the old mount options in case we
1941          * need to restore them.
1942          */
1943         org_mount_opt = sbi->mount_opt;
1944         old_sb_flags = sb->s_flags;
1945
1946 #ifdef CONFIG_QUOTA
1947         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1948         for (i = 0; i < MAXQUOTAS; i++) {
1949                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1950                         org_mount_opt.s_qf_names[i] =
1951                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1952                                 GFP_KERNEL);
1953                         if (!org_mount_opt.s_qf_names[i]) {
1954                                 for (j = 0; j < i; j++)
1955                                         kfree(org_mount_opt.s_qf_names[j]);
1956                                 return -ENOMEM;
1957                         }
1958                 } else {
1959                         org_mount_opt.s_qf_names[i] = NULL;
1960                 }
1961         }
1962 #endif
1963
1964         /* recover superblocks we couldn't write due to previous RO mount */
1965         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1966                 err = f2fs_commit_super(sbi, false);
1967                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
1968                           err);
1969                 if (!err)
1970                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1971         }
1972
1973         default_options(sbi);
1974
1975         /* parse mount options */
1976         err = parse_options(sb, data, true);
1977         if (err)
1978                 goto restore_opts;
1979         checkpoint_changed =
1980                         disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1981
1982         /*
1983          * Previous and new state of filesystem is RO,
1984          * so skip checking GC and FLUSH_MERGE conditions.
1985          */
1986         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
1987                 goto skip;
1988
1989 #ifdef CONFIG_QUOTA
1990         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
1991                 err = dquot_suspend(sb, -1);
1992                 if (err < 0)
1993                         goto restore_opts;
1994         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
1995                 /* dquot_resume needs RW */
1996                 sb->s_flags &= ~SB_RDONLY;
1997                 if (sb_any_quota_suspended(sb)) {
1998                         dquot_resume(sb, -1);
1999                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2000                         err = f2fs_enable_quotas(sb);
2001                         if (err)
2002                                 goto restore_opts;
2003                 }
2004         }
2005 #endif
2006         /* disallow enable atgc dynamically */
2007         if (no_atgc == !!test_opt(sbi, ATGC)) {
2008                 err = -EINVAL;
2009                 f2fs_warn(sbi, "switch atgc option is not allowed");
2010                 goto restore_opts;
2011         }
2012
2013         /* disallow enable/disable extent_cache dynamically */
2014         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2015                 err = -EINVAL;
2016                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2017                 goto restore_opts;
2018         }
2019
2020         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2021                 err = -EINVAL;
2022                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2023                 goto restore_opts;
2024         }
2025
2026         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2027                 err = -EINVAL;
2028                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2029                 goto restore_opts;
2030         }
2031
2032         /*
2033          * We stop the GC thread if FS is mounted as RO
2034          * or if background_gc = off is passed in mount
2035          * option. Also sync the filesystem.
2036          */
2037         if ((*flags & SB_RDONLY) ||
2038                         F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF) {
2039                 if (sbi->gc_thread) {
2040                         f2fs_stop_gc_thread(sbi);
2041                         need_restart_gc = true;
2042                 }
2043         } else if (!sbi->gc_thread) {
2044                 err = f2fs_start_gc_thread(sbi);
2045                 if (err)
2046                         goto restore_opts;
2047                 need_stop_gc = true;
2048         }
2049
2050         if (*flags & SB_RDONLY ||
2051                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
2052                 sync_inodes_sb(sb);
2053
2054                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2055                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2056                 f2fs_sync_fs(sb, 1);
2057                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2058         }
2059
2060         if (checkpoint_changed) {
2061                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2062                         err = f2fs_disable_checkpoint(sbi);
2063                         if (err)
2064                                 goto restore_gc;
2065                 } else {
2066                         f2fs_enable_checkpoint(sbi);
2067                 }
2068         }
2069
2070         if (!test_opt(sbi, DISABLE_CHECKPOINT) &&
2071                         test_opt(sbi, MERGE_CHECKPOINT)) {
2072                 err = f2fs_start_ckpt_thread(sbi);
2073                 if (err) {
2074                         f2fs_err(sbi,
2075                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2076                             err);
2077                         goto restore_gc;
2078                 }
2079         } else {
2080                 f2fs_stop_ckpt_thread(sbi);
2081         }
2082
2083         /*
2084          * We stop issue flush thread if FS is mounted as RO
2085          * or if flush_merge is not passed in mount option.
2086          */
2087         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2088                 clear_opt(sbi, FLUSH_MERGE);
2089                 f2fs_destroy_flush_cmd_control(sbi, false);
2090         } else {
2091                 err = f2fs_create_flush_cmd_control(sbi);
2092                 if (err)
2093                         goto restore_gc;
2094         }
2095 skip:
2096 #ifdef CONFIG_QUOTA
2097         /* Release old quota file names */
2098         for (i = 0; i < MAXQUOTAS; i++)
2099                 kfree(org_mount_opt.s_qf_names[i]);
2100 #endif
2101         /* Update the POSIXACL Flag */
2102         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2103                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2104
2105         limit_reserve_root(sbi);
2106         adjust_unusable_cap_perc(sbi);
2107         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2108         return 0;
2109 restore_gc:
2110         if (need_restart_gc) {
2111                 if (f2fs_start_gc_thread(sbi))
2112                         f2fs_warn(sbi, "background gc thread has stopped");
2113         } else if (need_stop_gc) {
2114                 f2fs_stop_gc_thread(sbi);
2115         }
2116 restore_opts:
2117 #ifdef CONFIG_QUOTA
2118         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2119         for (i = 0; i < MAXQUOTAS; i++) {
2120                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2121                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2122         }
2123 #endif
2124         sbi->mount_opt = org_mount_opt;
2125         sb->s_flags = old_sb_flags;
2126         return err;
2127 }
2128
2129 #ifdef CONFIG_QUOTA
2130 /* Read data from quotafile */
2131 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2132                                size_t len, loff_t off)
2133 {
2134         struct inode *inode = sb_dqopt(sb)->files[type];
2135         struct address_space *mapping = inode->i_mapping;
2136         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2137         int offset = off & (sb->s_blocksize - 1);
2138         int tocopy;
2139         size_t toread;
2140         loff_t i_size = i_size_read(inode);
2141         struct page *page;
2142         char *kaddr;
2143
2144         if (off > i_size)
2145                 return 0;
2146
2147         if (off + len > i_size)
2148                 len = i_size - off;
2149         toread = len;
2150         while (toread > 0) {
2151                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2152 repeat:
2153                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2154                 if (IS_ERR(page)) {
2155                         if (PTR_ERR(page) == -ENOMEM) {
2156                                 congestion_wait(BLK_RW_ASYNC,
2157                                                 DEFAULT_IO_TIMEOUT);
2158                                 goto repeat;
2159                         }
2160                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2161                         return PTR_ERR(page);
2162                 }
2163
2164                 lock_page(page);
2165
2166                 if (unlikely(page->mapping != mapping)) {
2167                         f2fs_put_page(page, 1);
2168                         goto repeat;
2169                 }
2170                 if (unlikely(!PageUptodate(page))) {
2171                         f2fs_put_page(page, 1);
2172                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2173                         return -EIO;
2174                 }
2175
2176                 kaddr = kmap_atomic(page);
2177                 memcpy(data, kaddr + offset, tocopy);
2178                 kunmap_atomic(kaddr);
2179                 f2fs_put_page(page, 1);
2180
2181                 offset = 0;
2182                 toread -= tocopy;
2183                 data += tocopy;
2184                 blkidx++;
2185         }
2186         return len;
2187 }
2188
2189 /* Write to quotafile */
2190 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2191                                 const char *data, size_t len, loff_t off)
2192 {
2193         struct inode *inode = sb_dqopt(sb)->files[type];
2194         struct address_space *mapping = inode->i_mapping;
2195         const struct address_space_operations *a_ops = mapping->a_ops;
2196         int offset = off & (sb->s_blocksize - 1);
2197         size_t towrite = len;
2198         struct page *page;
2199         void *fsdata = NULL;
2200         char *kaddr;
2201         int err = 0;
2202         int tocopy;
2203
2204         while (towrite > 0) {
2205                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2206                                                                 towrite);
2207 retry:
2208                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2209                                                         &page, &fsdata);
2210                 if (unlikely(err)) {
2211                         if (err == -ENOMEM) {
2212                                 congestion_wait(BLK_RW_ASYNC,
2213                                                 DEFAULT_IO_TIMEOUT);
2214                                 goto retry;
2215                         }
2216                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2217                         break;
2218                 }
2219
2220                 kaddr = kmap_atomic(page);
2221                 memcpy(kaddr + offset, data, tocopy);
2222                 kunmap_atomic(kaddr);
2223                 flush_dcache_page(page);
2224
2225                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2226                                                 page, fsdata);
2227                 offset = 0;
2228                 towrite -= tocopy;
2229                 off += tocopy;
2230                 data += tocopy;
2231                 cond_resched();
2232         }
2233
2234         if (len == towrite)
2235                 return err;
2236         inode->i_mtime = inode->i_ctime = current_time(inode);
2237         f2fs_mark_inode_dirty_sync(inode, false);
2238         return len - towrite;
2239 }
2240
2241 static struct dquot **f2fs_get_dquots(struct inode *inode)
2242 {
2243         return F2FS_I(inode)->i_dquot;
2244 }
2245
2246 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2247 {
2248         return &F2FS_I(inode)->i_reserved_quota;
2249 }
2250
2251 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2252 {
2253         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2254                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2255                 return 0;
2256         }
2257
2258         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2259                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2260 }
2261
2262 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2263 {
2264         int enabled = 0;
2265         int i, err;
2266
2267         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2268                 err = f2fs_enable_quotas(sbi->sb);
2269                 if (err) {
2270                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2271                         return 0;
2272                 }
2273                 return 1;
2274         }
2275
2276         for (i = 0; i < MAXQUOTAS; i++) {
2277                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2278                         err = f2fs_quota_on_mount(sbi, i);
2279                         if (!err) {
2280                                 enabled = 1;
2281                                 continue;
2282                         }
2283                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2284                                  err, i);
2285                 }
2286         }
2287         return enabled;
2288 }
2289
2290 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2291                              unsigned int flags)
2292 {
2293         struct inode *qf_inode;
2294         unsigned long qf_inum;
2295         int err;
2296
2297         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2298
2299         qf_inum = f2fs_qf_ino(sb, type);
2300         if (!qf_inum)
2301                 return -EPERM;
2302
2303         qf_inode = f2fs_iget(sb, qf_inum);
2304         if (IS_ERR(qf_inode)) {
2305                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2306                 return PTR_ERR(qf_inode);
2307         }
2308
2309         /* Don't account quota for quota files to avoid recursion */
2310         qf_inode->i_flags |= S_NOQUOTA;
2311         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2312         iput(qf_inode);
2313         return err;
2314 }
2315
2316 static int f2fs_enable_quotas(struct super_block *sb)
2317 {
2318         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2319         int type, err = 0;
2320         unsigned long qf_inum;
2321         bool quota_mopt[MAXQUOTAS] = {
2322                 test_opt(sbi, USRQUOTA),
2323                 test_opt(sbi, GRPQUOTA),
2324                 test_opt(sbi, PRJQUOTA),
2325         };
2326
2327         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2328                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2329                 return 0;
2330         }
2331
2332         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2333
2334         for (type = 0; type < MAXQUOTAS; type++) {
2335                 qf_inum = f2fs_qf_ino(sb, type);
2336                 if (qf_inum) {
2337                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2338                                 DQUOT_USAGE_ENABLED |
2339                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2340                         if (err) {
2341                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2342                                          type, err);
2343                                 for (type--; type >= 0; type--)
2344                                         dquot_quota_off(sb, type);
2345                                 set_sbi_flag(F2FS_SB(sb),
2346                                                 SBI_QUOTA_NEED_REPAIR);
2347                                 return err;
2348                         }
2349                 }
2350         }
2351         return 0;
2352 }
2353
2354 int f2fs_quota_sync(struct super_block *sb, int type)
2355 {
2356         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2357         struct quota_info *dqopt = sb_dqopt(sb);
2358         int cnt;
2359         int ret;
2360
2361         /*
2362          * do_quotactl
2363          *  f2fs_quota_sync
2364          *  down_read(quota_sem)
2365          *  dquot_writeback_dquots()
2366          *  f2fs_dquot_commit
2367          *                            block_operation
2368          *                            down_read(quota_sem)
2369          */
2370         f2fs_lock_op(sbi);
2371
2372         down_read(&sbi->quota_sem);
2373         ret = dquot_writeback_dquots(sb, type);
2374         if (ret)
2375                 goto out;
2376
2377         /*
2378          * Now when everything is written we can discard the pagecache so
2379          * that userspace sees the changes.
2380          */
2381         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2382                 struct address_space *mapping;
2383
2384                 if (type != -1 && cnt != type)
2385                         continue;
2386                 if (!sb_has_quota_active(sb, cnt))
2387                         continue;
2388
2389                 mapping = dqopt->files[cnt]->i_mapping;
2390
2391                 ret = filemap_fdatawrite(mapping);
2392                 if (ret)
2393                         goto out;
2394
2395                 /* if we are using journalled quota */
2396                 if (is_journalled_quota(sbi))
2397                         continue;
2398
2399                 ret = filemap_fdatawait(mapping);
2400                 if (ret)
2401                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2402
2403                 inode_lock(dqopt->files[cnt]);
2404                 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
2405                 inode_unlock(dqopt->files[cnt]);
2406         }
2407 out:
2408         if (ret)
2409                 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2410         up_read(&sbi->quota_sem);
2411         f2fs_unlock_op(sbi);
2412         return ret;
2413 }
2414
2415 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2416                                                         const struct path *path)
2417 {
2418         struct inode *inode;
2419         int err;
2420
2421         /* if quota sysfile exists, deny enabling quota with specific file */
2422         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2423                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2424                 return -EBUSY;
2425         }
2426
2427         err = f2fs_quota_sync(sb, type);
2428         if (err)
2429                 return err;
2430
2431         err = dquot_quota_on(sb, type, format_id, path);
2432         if (err)
2433                 return err;
2434
2435         inode = d_inode(path->dentry);
2436
2437         inode_lock(inode);
2438         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2439         f2fs_set_inode_flags(inode);
2440         inode_unlock(inode);
2441         f2fs_mark_inode_dirty_sync(inode, false);
2442
2443         return 0;
2444 }
2445
2446 static int __f2fs_quota_off(struct super_block *sb, int type)
2447 {
2448         struct inode *inode = sb_dqopt(sb)->files[type];
2449         int err;
2450
2451         if (!inode || !igrab(inode))
2452                 return dquot_quota_off(sb, type);
2453
2454         err = f2fs_quota_sync(sb, type);
2455         if (err)
2456                 goto out_put;
2457
2458         err = dquot_quota_off(sb, type);
2459         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2460                 goto out_put;
2461
2462         inode_lock(inode);
2463         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2464         f2fs_set_inode_flags(inode);
2465         inode_unlock(inode);
2466         f2fs_mark_inode_dirty_sync(inode, false);
2467 out_put:
2468         iput(inode);
2469         return err;
2470 }
2471
2472 static int f2fs_quota_off(struct super_block *sb, int type)
2473 {
2474         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2475         int err;
2476
2477         err = __f2fs_quota_off(sb, type);
2478
2479         /*
2480          * quotactl can shutdown journalled quota, result in inconsistence
2481          * between quota record and fs data by following updates, tag the
2482          * flag to let fsck be aware of it.
2483          */
2484         if (is_journalled_quota(sbi))
2485                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2486         return err;
2487 }
2488
2489 void f2fs_quota_off_umount(struct super_block *sb)
2490 {
2491         int type;
2492         int err;
2493
2494         for (type = 0; type < MAXQUOTAS; type++) {
2495                 err = __f2fs_quota_off(sb, type);
2496                 if (err) {
2497                         int ret = dquot_quota_off(sb, type);
2498
2499                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2500                                  type, err, ret);
2501                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2502                 }
2503         }
2504         /*
2505          * In case of checkpoint=disable, we must flush quota blocks.
2506          * This can cause NULL exception for node_inode in end_io, since
2507          * put_super already dropped it.
2508          */
2509         sync_filesystem(sb);
2510 }
2511
2512 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2513 {
2514         struct quota_info *dqopt = sb_dqopt(sb);
2515         int type;
2516
2517         for (type = 0; type < MAXQUOTAS; type++) {
2518                 if (!dqopt->files[type])
2519                         continue;
2520                 f2fs_inode_synced(dqopt->files[type]);
2521         }
2522 }
2523
2524 static int f2fs_dquot_commit(struct dquot *dquot)
2525 {
2526         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2527         int ret;
2528
2529         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2530         ret = dquot_commit(dquot);
2531         if (ret < 0)
2532                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2533         up_read(&sbi->quota_sem);
2534         return ret;
2535 }
2536
2537 static int f2fs_dquot_acquire(struct dquot *dquot)
2538 {
2539         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2540         int ret;
2541
2542         down_read(&sbi->quota_sem);
2543         ret = dquot_acquire(dquot);
2544         if (ret < 0)
2545                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2546         up_read(&sbi->quota_sem);
2547         return ret;
2548 }
2549
2550 static int f2fs_dquot_release(struct dquot *dquot)
2551 {
2552         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2553         int ret = dquot_release(dquot);
2554
2555         if (ret < 0)
2556                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2557         return ret;
2558 }
2559
2560 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2561 {
2562         struct super_block *sb = dquot->dq_sb;
2563         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2564         int ret = dquot_mark_dquot_dirty(dquot);
2565
2566         /* if we are using journalled quota */
2567         if (is_journalled_quota(sbi))
2568                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2569
2570         return ret;
2571 }
2572
2573 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2574 {
2575         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2576         int ret = dquot_commit_info(sb, type);
2577
2578         if (ret < 0)
2579                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2580         return ret;
2581 }
2582
2583 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2584 {
2585         *projid = F2FS_I(inode)->i_projid;
2586         return 0;
2587 }
2588
2589 static const struct dquot_operations f2fs_quota_operations = {
2590         .get_reserved_space = f2fs_get_reserved_space,
2591         .write_dquot    = f2fs_dquot_commit,
2592         .acquire_dquot  = f2fs_dquot_acquire,
2593         .release_dquot  = f2fs_dquot_release,
2594         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2595         .write_info     = f2fs_dquot_commit_info,
2596         .alloc_dquot    = dquot_alloc,
2597         .destroy_dquot  = dquot_destroy,
2598         .get_projid     = f2fs_get_projid,
2599         .get_next_id    = dquot_get_next_id,
2600 };
2601
2602 static const struct quotactl_ops f2fs_quotactl_ops = {
2603         .quota_on       = f2fs_quota_on,
2604         .quota_off      = f2fs_quota_off,
2605         .quota_sync     = f2fs_quota_sync,
2606         .get_state      = dquot_get_state,
2607         .set_info       = dquot_set_dqinfo,
2608         .get_dqblk      = dquot_get_dqblk,
2609         .set_dqblk      = dquot_set_dqblk,
2610         .get_nextdqblk  = dquot_get_next_dqblk,
2611 };
2612 #else
2613 int f2fs_quota_sync(struct super_block *sb, int type)
2614 {
2615         return 0;
2616 }
2617
2618 void f2fs_quota_off_umount(struct super_block *sb)
2619 {
2620 }
2621 #endif
2622
2623 static const struct super_operations f2fs_sops = {
2624         .alloc_inode    = f2fs_alloc_inode,
2625         .free_inode     = f2fs_free_inode,
2626         .drop_inode     = f2fs_drop_inode,
2627         .write_inode    = f2fs_write_inode,
2628         .dirty_inode    = f2fs_dirty_inode,
2629         .show_options   = f2fs_show_options,
2630 #ifdef CONFIG_QUOTA
2631         .quota_read     = f2fs_quota_read,
2632         .quota_write    = f2fs_quota_write,
2633         .get_dquots     = f2fs_get_dquots,
2634 #endif
2635         .evict_inode    = f2fs_evict_inode,
2636         .put_super      = f2fs_put_super,
2637         .sync_fs        = f2fs_sync_fs,
2638         .freeze_fs      = f2fs_freeze,
2639         .unfreeze_fs    = f2fs_unfreeze,
2640         .statfs         = f2fs_statfs,
2641         .remount_fs     = f2fs_remount,
2642 };
2643
2644 #ifdef CONFIG_FS_ENCRYPTION
2645 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2646 {
2647         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2648                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2649                                 ctx, len, NULL);
2650 }
2651
2652 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2653                                                         void *fs_data)
2654 {
2655         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2656
2657         /*
2658          * Encrypting the root directory is not allowed because fsck
2659          * expects lost+found directory to exist and remain unencrypted
2660          * if LOST_FOUND feature is enabled.
2661          *
2662          */
2663         if (f2fs_sb_has_lost_found(sbi) &&
2664                         inode->i_ino == F2FS_ROOT_INO(sbi))
2665                 return -EPERM;
2666
2667         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2668                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2669                                 ctx, len, fs_data, XATTR_CREATE);
2670 }
2671
2672 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2673 {
2674         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2675 }
2676
2677 static bool f2fs_has_stable_inodes(struct super_block *sb)
2678 {
2679         return true;
2680 }
2681
2682 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2683                                        int *ino_bits_ret, int *lblk_bits_ret)
2684 {
2685         *ino_bits_ret = 8 * sizeof(nid_t);
2686         *lblk_bits_ret = 8 * sizeof(block_t);
2687 }
2688
2689 static int f2fs_get_num_devices(struct super_block *sb)
2690 {
2691         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2692
2693         if (f2fs_is_multi_device(sbi))
2694                 return sbi->s_ndevs;
2695         return 1;
2696 }
2697
2698 static void f2fs_get_devices(struct super_block *sb,
2699                              struct request_queue **devs)
2700 {
2701         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2702         int i;
2703
2704         for (i = 0; i < sbi->s_ndevs; i++)
2705                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2706 }
2707
2708 static const struct fscrypt_operations f2fs_cryptops = {
2709         .key_prefix             = "f2fs:",
2710         .get_context            = f2fs_get_context,
2711         .set_context            = f2fs_set_context,
2712         .get_dummy_policy       = f2fs_get_dummy_policy,
2713         .empty_dir              = f2fs_empty_dir,
2714         .max_namelen            = F2FS_NAME_LEN,
2715         .has_stable_inodes      = f2fs_has_stable_inodes,
2716         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2717         .get_num_devices        = f2fs_get_num_devices,
2718         .get_devices            = f2fs_get_devices,
2719 };
2720 #endif
2721
2722 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2723                 u64 ino, u32 generation)
2724 {
2725         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2726         struct inode *inode;
2727
2728         if (f2fs_check_nid_range(sbi, ino))
2729                 return ERR_PTR(-ESTALE);
2730
2731         /*
2732          * f2fs_iget isn't quite right if the inode is currently unallocated!
2733          * However f2fs_iget currently does appropriate checks to handle stale
2734          * inodes so everything is OK.
2735          */
2736         inode = f2fs_iget(sb, ino);
2737         if (IS_ERR(inode))
2738                 return ERR_CAST(inode);
2739         if (unlikely(generation && inode->i_generation != generation)) {
2740                 /* we didn't find the right inode.. */
2741                 iput(inode);
2742                 return ERR_PTR(-ESTALE);
2743         }
2744         return inode;
2745 }
2746
2747 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2748                 int fh_len, int fh_type)
2749 {
2750         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2751                                     f2fs_nfs_get_inode);
2752 }
2753
2754 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2755                 int fh_len, int fh_type)
2756 {
2757         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2758                                     f2fs_nfs_get_inode);
2759 }
2760
2761 static const struct export_operations f2fs_export_ops = {
2762         .fh_to_dentry = f2fs_fh_to_dentry,
2763         .fh_to_parent = f2fs_fh_to_parent,
2764         .get_parent = f2fs_get_parent,
2765 };
2766
2767 loff_t max_file_blocks(struct inode *inode)
2768 {
2769         loff_t result = 0;
2770         loff_t leaf_count;
2771
2772         /*
2773          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2774          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2775          * space in inode.i_addr, it will be more safe to reassign
2776          * result as zero.
2777          */
2778
2779         if (inode && f2fs_compressed_file(inode))
2780                 leaf_count = ADDRS_PER_BLOCK(inode);
2781         else
2782                 leaf_count = DEF_ADDRS_PER_BLOCK;
2783
2784         /* two direct node blocks */
2785         result += (leaf_count * 2);
2786
2787         /* two indirect node blocks */
2788         leaf_count *= NIDS_PER_BLOCK;
2789         result += (leaf_count * 2);
2790
2791         /* one double indirect node block */
2792         leaf_count *= NIDS_PER_BLOCK;
2793         result += leaf_count;
2794
2795         return result;
2796 }
2797
2798 static int __f2fs_commit_super(struct buffer_head *bh,
2799                         struct f2fs_super_block *super)
2800 {
2801         lock_buffer(bh);
2802         if (super)
2803                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2804         set_buffer_dirty(bh);
2805         unlock_buffer(bh);
2806
2807         /* it's rare case, we can do fua all the time */
2808         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2809 }
2810
2811 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2812                                         struct buffer_head *bh)
2813 {
2814         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2815                                         (bh->b_data + F2FS_SUPER_OFFSET);
2816         struct super_block *sb = sbi->sb;
2817         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2818         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2819         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2820         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2821         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2822         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2823         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2824         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2825         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2826         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2827         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2828         u32 segment_count = le32_to_cpu(raw_super->segment_count);
2829         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2830         u64 main_end_blkaddr = main_blkaddr +
2831                                 (segment_count_main << log_blocks_per_seg);
2832         u64 seg_end_blkaddr = segment0_blkaddr +
2833                                 (segment_count << log_blocks_per_seg);
2834
2835         if (segment0_blkaddr != cp_blkaddr) {
2836                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2837                           segment0_blkaddr, cp_blkaddr);
2838                 return true;
2839         }
2840
2841         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2842                                                         sit_blkaddr) {
2843                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2844                           cp_blkaddr, sit_blkaddr,
2845                           segment_count_ckpt << log_blocks_per_seg);
2846                 return true;
2847         }
2848
2849         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2850                                                         nat_blkaddr) {
2851                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2852                           sit_blkaddr, nat_blkaddr,
2853                           segment_count_sit << log_blocks_per_seg);
2854                 return true;
2855         }
2856
2857         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2858                                                         ssa_blkaddr) {
2859                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2860                           nat_blkaddr, ssa_blkaddr,
2861                           segment_count_nat << log_blocks_per_seg);
2862                 return true;
2863         }
2864
2865         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2866                                                         main_blkaddr) {
2867                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2868                           ssa_blkaddr, main_blkaddr,
2869                           segment_count_ssa << log_blocks_per_seg);
2870                 return true;
2871         }
2872
2873         if (main_end_blkaddr > seg_end_blkaddr) {
2874                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
2875                           main_blkaddr, seg_end_blkaddr,
2876                           segment_count_main << log_blocks_per_seg);
2877                 return true;
2878         } else if (main_end_blkaddr < seg_end_blkaddr) {
2879                 int err = 0;
2880                 char *res;
2881
2882                 /* fix in-memory information all the time */
2883                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2884                                 segment0_blkaddr) >> log_blocks_per_seg);
2885
2886                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2887                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2888                         res = "internally";
2889                 } else {
2890                         err = __f2fs_commit_super(bh, NULL);
2891                         res = err ? "failed" : "done";
2892                 }
2893                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
2894                           res, main_blkaddr, seg_end_blkaddr,
2895                           segment_count_main << log_blocks_per_seg);
2896                 if (err)
2897                         return true;
2898         }
2899         return false;
2900 }
2901
2902 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2903                                 struct buffer_head *bh)
2904 {
2905         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
2906         block_t total_sections, blocks_per_seg;
2907         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2908                                         (bh->b_data + F2FS_SUPER_OFFSET);
2909         size_t crc_offset = 0;
2910         __u32 crc = 0;
2911
2912         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
2913                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
2914                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2915                 return -EINVAL;
2916         }
2917
2918         /* Check checksum_offset and crc in superblock */
2919         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2920                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2921                 if (crc_offset !=
2922                         offsetof(struct f2fs_super_block, crc)) {
2923                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
2924                                   crc_offset);
2925                         return -EFSCORRUPTED;
2926                 }
2927                 crc = le32_to_cpu(raw_super->crc);
2928                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2929                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
2930                         return -EFSCORRUPTED;
2931                 }
2932         }
2933
2934         /* Currently, support only 4KB block size */
2935         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
2936                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
2937                           le32_to_cpu(raw_super->log_blocksize),
2938                           F2FS_BLKSIZE_BITS);
2939                 return -EFSCORRUPTED;
2940         }
2941
2942         /* check log blocks per segment */
2943         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2944                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
2945                           le32_to_cpu(raw_super->log_blocks_per_seg));
2946                 return -EFSCORRUPTED;
2947         }
2948
2949         /* Currently, support 512/1024/2048/4096 bytes sector size */
2950         if (le32_to_cpu(raw_super->log_sectorsize) >
2951                                 F2FS_MAX_LOG_SECTOR_SIZE ||
2952                 le32_to_cpu(raw_super->log_sectorsize) <
2953                                 F2FS_MIN_LOG_SECTOR_SIZE) {
2954                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
2955                           le32_to_cpu(raw_super->log_sectorsize));
2956                 return -EFSCORRUPTED;
2957         }
2958         if (le32_to_cpu(raw_super->log_sectors_per_block) +
2959                 le32_to_cpu(raw_super->log_sectorsize) !=
2960                         F2FS_MAX_LOG_SECTOR_SIZE) {
2961                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
2962                           le32_to_cpu(raw_super->log_sectors_per_block),
2963                           le32_to_cpu(raw_super->log_sectorsize));
2964                 return -EFSCORRUPTED;
2965         }
2966
2967         segment_count = le32_to_cpu(raw_super->segment_count);
2968         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2969         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2970         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2971         total_sections = le32_to_cpu(raw_super->section_count);
2972
2973         /* blocks_per_seg should be 512, given the above check */
2974         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2975
2976         if (segment_count > F2FS_MAX_SEGMENT ||
2977                                 segment_count < F2FS_MIN_SEGMENTS) {
2978                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
2979                 return -EFSCORRUPTED;
2980         }
2981
2982         if (total_sections > segment_count_main || total_sections < 1 ||
2983                         segs_per_sec > segment_count || !segs_per_sec) {
2984                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
2985                           segment_count, total_sections, segs_per_sec);
2986                 return -EFSCORRUPTED;
2987         }
2988
2989         if (segment_count_main != total_sections * segs_per_sec) {
2990                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
2991                           segment_count_main, total_sections, segs_per_sec);
2992                 return -EFSCORRUPTED;
2993         }
2994
2995         if ((segment_count / segs_per_sec) < total_sections) {
2996                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
2997                           segment_count, segs_per_sec, total_sections);
2998                 return -EFSCORRUPTED;
2999         }
3000
3001         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3002                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3003                           segment_count, le64_to_cpu(raw_super->block_count));
3004                 return -EFSCORRUPTED;
3005         }
3006
3007         if (RDEV(0).path[0]) {
3008                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3009                 int i = 1;
3010
3011                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3012                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3013                         i++;
3014                 }
3015                 if (segment_count != dev_seg_count) {
3016                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3017                                         segment_count, dev_seg_count);
3018                         return -EFSCORRUPTED;
3019                 }
3020         } else {
3021                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3022                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3023                         f2fs_info(sbi, "Zoned block device path is missing");
3024                         return -EFSCORRUPTED;
3025                 }
3026         }
3027
3028         if (secs_per_zone > total_sections || !secs_per_zone) {
3029                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3030                           secs_per_zone, total_sections);
3031                 return -EFSCORRUPTED;
3032         }
3033         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3034                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3035                         (le32_to_cpu(raw_super->extension_count) +
3036                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3037                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3038                           le32_to_cpu(raw_super->extension_count),
3039                           raw_super->hot_ext_count,
3040                           F2FS_MAX_EXTENSION);
3041                 return -EFSCORRUPTED;
3042         }
3043
3044         if (le32_to_cpu(raw_super->cp_payload) >
3045                                 (blocks_per_seg - F2FS_CP_PACKS)) {
3046                 f2fs_info(sbi, "Insane cp_payload (%u > %u)",
3047                           le32_to_cpu(raw_super->cp_payload),
3048                           blocks_per_seg - F2FS_CP_PACKS);
3049                 return -EFSCORRUPTED;
3050         }
3051
3052         /* check reserved ino info */
3053         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3054                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3055                 le32_to_cpu(raw_super->root_ino) != 3) {
3056                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3057                           le32_to_cpu(raw_super->node_ino),
3058                           le32_to_cpu(raw_super->meta_ino),
3059                           le32_to_cpu(raw_super->root_ino));
3060                 return -EFSCORRUPTED;
3061         }
3062
3063         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3064         if (sanity_check_area_boundary(sbi, bh))
3065                 return -EFSCORRUPTED;
3066
3067         return 0;
3068 }
3069
3070 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3071 {
3072         unsigned int total, fsmeta;
3073         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3074         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3075         unsigned int ovp_segments, reserved_segments;
3076         unsigned int main_segs, blocks_per_seg;
3077         unsigned int sit_segs, nat_segs;
3078         unsigned int sit_bitmap_size, nat_bitmap_size;
3079         unsigned int log_blocks_per_seg;
3080         unsigned int segment_count_main;
3081         unsigned int cp_pack_start_sum, cp_payload;
3082         block_t user_block_count, valid_user_blocks;
3083         block_t avail_node_count, valid_node_count;
3084         int i, j;
3085
3086         total = le32_to_cpu(raw_super->segment_count);
3087         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3088         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3089         fsmeta += sit_segs;
3090         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3091         fsmeta += nat_segs;
3092         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3093         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3094
3095         if (unlikely(fsmeta >= total))
3096                 return 1;
3097
3098         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3099         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3100
3101         if (unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3102                         ovp_segments == 0 || reserved_segments == 0)) {
3103                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3104                 return 1;
3105         }
3106
3107         user_block_count = le64_to_cpu(ckpt->user_block_count);
3108         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3109         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3110         if (!user_block_count || user_block_count >=
3111                         segment_count_main << log_blocks_per_seg) {
3112                 f2fs_err(sbi, "Wrong user_block_count: %u",
3113                          user_block_count);
3114                 return 1;
3115         }
3116
3117         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3118         if (valid_user_blocks > user_block_count) {
3119                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3120                          valid_user_blocks, user_block_count);
3121                 return 1;
3122         }
3123
3124         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3125         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3126         if (valid_node_count > avail_node_count) {
3127                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3128                          valid_node_count, avail_node_count);
3129                 return 1;
3130         }
3131
3132         main_segs = le32_to_cpu(raw_super->segment_count_main);
3133         blocks_per_seg = sbi->blocks_per_seg;
3134
3135         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3136                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3137                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3138                         return 1;
3139                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3140                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3141                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3142                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3143                                          i, j,
3144                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3145                                 return 1;
3146                         }
3147                 }
3148         }
3149         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3150                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3151                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3152                         return 1;
3153                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3154                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3155                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3156                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3157                                          i, j,
3158                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3159                                 return 1;
3160                         }
3161                 }
3162         }
3163         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3164                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3165                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3166                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3167                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3168                                          i, j,
3169                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3170                                 return 1;
3171                         }
3172                 }
3173         }
3174
3175         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3176         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3177
3178         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3179                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3180                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3181                          sit_bitmap_size, nat_bitmap_size);
3182                 return 1;
3183         }
3184
3185         cp_pack_start_sum = __start_sum_addr(sbi);
3186         cp_payload = __cp_payload(sbi);
3187         if (cp_pack_start_sum < cp_payload + 1 ||
3188                 cp_pack_start_sum > blocks_per_seg - 1 -
3189                         NR_CURSEG_PERSIST_TYPE) {
3190                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3191                          cp_pack_start_sum);
3192                 return 1;
3193         }
3194
3195         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3196                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3197                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3198                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3199                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3200                           le32_to_cpu(ckpt->checksum_offset));
3201                 return 1;
3202         }
3203
3204         if (unlikely(f2fs_cp_error(sbi))) {
3205                 f2fs_err(sbi, "A bug case: need to run fsck");
3206                 return 1;
3207         }
3208         return 0;
3209 }
3210
3211 static void init_sb_info(struct f2fs_sb_info *sbi)
3212 {
3213         struct f2fs_super_block *raw_super = sbi->raw_super;
3214         int i;
3215
3216         sbi->log_sectors_per_block =
3217                 le32_to_cpu(raw_super->log_sectors_per_block);
3218         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3219         sbi->blocksize = 1 << sbi->log_blocksize;
3220         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3221         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3222         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3223         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3224         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3225         sbi->total_node_count =
3226                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3227                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3228         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3229         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3230         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3231         sbi->cur_victim_sec = NULL_SECNO;
3232         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3233         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3234         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3235         sbi->migration_granularity = sbi->segs_per_sec;
3236
3237         sbi->dir_level = DEF_DIR_LEVEL;
3238         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3239         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3240         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3241         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3242         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3243         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3244                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3245         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3246
3247         for (i = 0; i < NR_COUNT_TYPE; i++)
3248                 atomic_set(&sbi->nr_pages[i], 0);
3249
3250         for (i = 0; i < META; i++)
3251                 atomic_set(&sbi->wb_sync_req[i], 0);
3252
3253         INIT_LIST_HEAD(&sbi->s_list);
3254         mutex_init(&sbi->umount_mutex);
3255         init_rwsem(&sbi->io_order_lock);
3256         spin_lock_init(&sbi->cp_lock);
3257
3258         sbi->dirty_device = 0;
3259         spin_lock_init(&sbi->dev_lock);
3260
3261         init_rwsem(&sbi->sb_lock);
3262         init_rwsem(&sbi->pin_sem);
3263 }
3264
3265 static int init_percpu_info(struct f2fs_sb_info *sbi)
3266 {
3267         int err;
3268
3269         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3270         if (err)
3271                 return err;
3272
3273         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3274                                                                 GFP_KERNEL);
3275         if (err)
3276                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3277
3278         return err;
3279 }
3280
3281 #ifdef CONFIG_BLK_DEV_ZONED
3282
3283 struct f2fs_report_zones_args {
3284         struct f2fs_dev_info *dev;
3285         bool zone_cap_mismatch;
3286 };
3287
3288 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3289                               void *data)
3290 {
3291         struct f2fs_report_zones_args *rz_args = data;
3292
3293         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3294                 return 0;
3295
3296         set_bit(idx, rz_args->dev->blkz_seq);
3297         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3298                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3299         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3300                 rz_args->zone_cap_mismatch = true;
3301
3302         return 0;
3303 }
3304
3305 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3306 {
3307         struct block_device *bdev = FDEV(devi).bdev;
3308         sector_t nr_sectors = bdev_nr_sectors(bdev);
3309         struct f2fs_report_zones_args rep_zone_arg;
3310         int ret;
3311
3312         if (!f2fs_sb_has_blkzoned(sbi))
3313                 return 0;
3314
3315         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3316                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3317                 return -EINVAL;
3318         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3319         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3320                                 __ilog2_u32(sbi->blocks_per_blkz))
3321                 return -EINVAL;
3322         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3323         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3324                                         sbi->log_blocks_per_blkz;
3325         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3326                 FDEV(devi).nr_blkz++;
3327
3328         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3329                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3330                                         * sizeof(unsigned long),
3331                                         GFP_KERNEL);
3332         if (!FDEV(devi).blkz_seq)
3333                 return -ENOMEM;
3334
3335         /* Get block zones type and zone-capacity */
3336         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3337                                         FDEV(devi).nr_blkz * sizeof(block_t),
3338                                         GFP_KERNEL);
3339         if (!FDEV(devi).zone_capacity_blocks)
3340                 return -ENOMEM;
3341
3342         rep_zone_arg.dev = &FDEV(devi);
3343         rep_zone_arg.zone_cap_mismatch = false;
3344
3345         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3346                                   &rep_zone_arg);
3347         if (ret < 0)
3348                 return ret;
3349
3350         if (!rep_zone_arg.zone_cap_mismatch) {
3351                 kfree(FDEV(devi).zone_capacity_blocks);
3352                 FDEV(devi).zone_capacity_blocks = NULL;
3353         }
3354
3355         return 0;
3356 }
3357 #endif
3358
3359 /*
3360  * Read f2fs raw super block.
3361  * Because we have two copies of super block, so read both of them
3362  * to get the first valid one. If any one of them is broken, we pass
3363  * them recovery flag back to the caller.
3364  */
3365 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3366                         struct f2fs_super_block **raw_super,
3367                         int *valid_super_block, int *recovery)
3368 {
3369         struct super_block *sb = sbi->sb;
3370         int block;
3371         struct buffer_head *bh;
3372         struct f2fs_super_block *super;
3373         int err = 0;
3374
3375         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3376         if (!super)
3377                 return -ENOMEM;
3378
3379         for (block = 0; block < 2; block++) {
3380                 bh = sb_bread(sb, block);
3381                 if (!bh) {
3382                         f2fs_err(sbi, "Unable to read %dth superblock",
3383                                  block + 1);
3384                         err = -EIO;
3385                         *recovery = 1;
3386                         continue;
3387                 }
3388
3389                 /* sanity checking of raw super */
3390                 err = sanity_check_raw_super(sbi, bh);
3391                 if (err) {
3392                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3393                                  block + 1);
3394                         brelse(bh);
3395                         *recovery = 1;
3396                         continue;
3397                 }
3398
3399                 if (!*raw_super) {
3400                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3401                                                         sizeof(*super));
3402                         *valid_super_block = block;
3403                         *raw_super = super;
3404                 }
3405                 brelse(bh);
3406         }
3407
3408         /* No valid superblock */
3409         if (!*raw_super)
3410                 kfree(super);
3411         else
3412                 err = 0;
3413
3414         return err;
3415 }
3416
3417 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3418 {
3419         struct buffer_head *bh;
3420         __u32 crc = 0;
3421         int err;
3422
3423         if ((recover && f2fs_readonly(sbi->sb)) ||
3424                                 bdev_read_only(sbi->sb->s_bdev)) {
3425                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3426                 return -EROFS;
3427         }
3428
3429         /* we should update superblock crc here */
3430         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3431                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3432                                 offsetof(struct f2fs_super_block, crc));
3433                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3434         }
3435
3436         /* write back-up superblock first */
3437         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3438         if (!bh)
3439                 return -EIO;
3440         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3441         brelse(bh);
3442
3443         /* if we are in recovery path, skip writing valid superblock */
3444         if (recover || err)
3445                 return err;
3446
3447         /* write current valid superblock */
3448         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3449         if (!bh)
3450                 return -EIO;
3451         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3452         brelse(bh);
3453         return err;
3454 }
3455
3456 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3457 {
3458         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3459         unsigned int max_devices = MAX_DEVICES;
3460         int i;
3461
3462         /* Initialize single device information */
3463         if (!RDEV(0).path[0]) {
3464                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3465                         return 0;
3466                 max_devices = 1;
3467         }
3468
3469         /*
3470          * Initialize multiple devices information, or single
3471          * zoned block device information.
3472          */
3473         sbi->devs = f2fs_kzalloc(sbi,
3474                                  array_size(max_devices,
3475                                             sizeof(struct f2fs_dev_info)),
3476                                  GFP_KERNEL);
3477         if (!sbi->devs)
3478                 return -ENOMEM;
3479
3480         for (i = 0; i < max_devices; i++) {
3481
3482                 if (i > 0 && !RDEV(i).path[0])
3483                         break;
3484
3485                 if (max_devices == 1) {
3486                         /* Single zoned block device mount */
3487                         FDEV(0).bdev =
3488                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3489                                         sbi->sb->s_mode, sbi->sb->s_type);
3490                 } else {
3491                         /* Multi-device mount */
3492                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3493                         FDEV(i).total_segments =
3494                                 le32_to_cpu(RDEV(i).total_segments);
3495                         if (i == 0) {
3496                                 FDEV(i).start_blk = 0;
3497                                 FDEV(i).end_blk = FDEV(i).start_blk +
3498                                     (FDEV(i).total_segments <<
3499                                     sbi->log_blocks_per_seg) - 1 +
3500                                     le32_to_cpu(raw_super->segment0_blkaddr);
3501                         } else {
3502                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3503                                 FDEV(i).end_blk = FDEV(i).start_blk +
3504                                         (FDEV(i).total_segments <<
3505                                         sbi->log_blocks_per_seg) - 1;
3506                         }
3507                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3508                                         sbi->sb->s_mode, sbi->sb->s_type);
3509                 }
3510                 if (IS_ERR(FDEV(i).bdev))
3511                         return PTR_ERR(FDEV(i).bdev);
3512
3513                 /* to release errored devices */
3514                 sbi->s_ndevs = i + 1;
3515
3516 #ifdef CONFIG_BLK_DEV_ZONED
3517                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3518                                 !f2fs_sb_has_blkzoned(sbi)) {
3519                         f2fs_err(sbi, "Zoned block device feature not enabled\n");
3520                         return -EINVAL;
3521                 }
3522                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3523                         if (init_blkz_info(sbi, i)) {
3524                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3525                                 return -EINVAL;
3526                         }
3527                         if (max_devices == 1)
3528                                 break;
3529                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3530                                   i, FDEV(i).path,
3531                                   FDEV(i).total_segments,
3532                                   FDEV(i).start_blk, FDEV(i).end_blk,
3533                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3534                                   "Host-aware" : "Host-managed");
3535                         continue;
3536                 }
3537 #endif
3538                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3539                           i, FDEV(i).path,
3540                           FDEV(i).total_segments,
3541                           FDEV(i).start_blk, FDEV(i).end_blk);
3542         }
3543         f2fs_info(sbi,
3544                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3545         return 0;
3546 }
3547
3548 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3549 {
3550 #ifdef CONFIG_UNICODE
3551         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3552                 const struct f2fs_sb_encodings *encoding_info;
3553                 struct unicode_map *encoding;
3554                 __u16 encoding_flags;
3555
3556                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3557                                           &encoding_flags)) {
3558                         f2fs_err(sbi,
3559                                  "Encoding requested by superblock is unknown");
3560                         return -EINVAL;
3561                 }
3562
3563                 encoding = utf8_load(encoding_info->version);
3564                 if (IS_ERR(encoding)) {
3565                         f2fs_err(sbi,
3566                                  "can't mount with superblock charset: %s-%s "
3567                                  "not supported by the kernel. flags: 0x%x.",
3568                                  encoding_info->name, encoding_info->version,
3569                                  encoding_flags);
3570                         return PTR_ERR(encoding);
3571                 }
3572                 f2fs_info(sbi, "Using encoding defined by superblock: "
3573                          "%s-%s with flags 0x%hx", encoding_info->name,
3574                          encoding_info->version?:"\b", encoding_flags);
3575
3576                 sbi->sb->s_encoding = encoding;
3577                 sbi->sb->s_encoding_flags = encoding_flags;
3578         }
3579 #else
3580         if (f2fs_sb_has_casefold(sbi)) {
3581                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3582                 return -EINVAL;
3583         }
3584 #endif
3585         return 0;
3586 }
3587
3588 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3589 {
3590         struct f2fs_sm_info *sm_i = SM_I(sbi);
3591
3592         /* adjust parameters according to the volume size */
3593         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3594                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3595                 sm_i->dcc_info->discard_granularity = 1;
3596                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3597         }
3598
3599         sbi->readdir_ra = 1;
3600 }
3601
3602 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3603 {
3604         struct f2fs_sb_info *sbi;
3605         struct f2fs_super_block *raw_super;
3606         struct inode *root;
3607         int err;
3608         bool skip_recovery = false, need_fsck = false;
3609         char *options = NULL;
3610         int recovery, i, valid_super_block;
3611         struct curseg_info *seg_i;
3612         int retry_cnt = 1;
3613
3614 try_onemore:
3615         err = -EINVAL;
3616         raw_super = NULL;
3617         valid_super_block = -1;
3618         recovery = 0;
3619
3620         /* allocate memory for f2fs-specific super block info */
3621         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3622         if (!sbi)
3623                 return -ENOMEM;
3624
3625         sbi->sb = sb;
3626
3627         /* Load the checksum driver */
3628         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3629         if (IS_ERR(sbi->s_chksum_driver)) {
3630                 f2fs_err(sbi, "Cannot load crc32 driver.");
3631                 err = PTR_ERR(sbi->s_chksum_driver);
3632                 sbi->s_chksum_driver = NULL;
3633                 goto free_sbi;
3634         }
3635
3636         /* set a block size */
3637         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3638                 f2fs_err(sbi, "unable to set blocksize");
3639                 goto free_sbi;
3640         }
3641
3642         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3643                                                                 &recovery);
3644         if (err)
3645                 goto free_sbi;
3646
3647         sb->s_fs_info = sbi;
3648         sbi->raw_super = raw_super;
3649
3650         /* precompute checksum seed for metadata */
3651         if (f2fs_sb_has_inode_chksum(sbi))
3652                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3653                                                 sizeof(raw_super->uuid));
3654
3655         default_options(sbi);
3656         /* parse mount options */
3657         options = kstrdup((const char *)data, GFP_KERNEL);
3658         if (data && !options) {
3659                 err = -ENOMEM;
3660                 goto free_sb_buf;
3661         }
3662
3663         err = parse_options(sb, options, false);
3664         if (err)
3665                 goto free_options;
3666
3667         sb->s_maxbytes = max_file_blocks(NULL) <<
3668                                 le32_to_cpu(raw_super->log_blocksize);
3669         sb->s_max_links = F2FS_LINK_MAX;
3670
3671         err = f2fs_setup_casefold(sbi);
3672         if (err)
3673                 goto free_options;
3674
3675 #ifdef CONFIG_QUOTA
3676         sb->dq_op = &f2fs_quota_operations;
3677         sb->s_qcop = &f2fs_quotactl_ops;
3678         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3679
3680         if (f2fs_sb_has_quota_ino(sbi)) {
3681                 for (i = 0; i < MAXQUOTAS; i++) {
3682                         if (f2fs_qf_ino(sbi->sb, i))
3683                                 sbi->nquota_files++;
3684                 }
3685         }
3686 #endif
3687
3688         sb->s_op = &f2fs_sops;
3689 #ifdef CONFIG_FS_ENCRYPTION
3690         sb->s_cop = &f2fs_cryptops;
3691 #endif
3692 #ifdef CONFIG_FS_VERITY
3693         sb->s_vop = &f2fs_verityops;
3694 #endif
3695         sb->s_xattr = f2fs_xattr_handlers;
3696         sb->s_export_op = &f2fs_export_ops;
3697         sb->s_magic = F2FS_SUPER_MAGIC;
3698         sb->s_time_gran = 1;
3699         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3700                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3701         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3702         sb->s_iflags |= SB_I_CGROUPWB;
3703
3704         /* init f2fs-specific super block info */
3705         sbi->valid_super_block = valid_super_block;
3706         init_rwsem(&sbi->gc_lock);
3707         mutex_init(&sbi->writepages);
3708         init_rwsem(&sbi->cp_global_sem);
3709         init_rwsem(&sbi->node_write);
3710         init_rwsem(&sbi->node_change);
3711
3712         /* disallow all the data/node/meta page writes */
3713         set_sbi_flag(sbi, SBI_POR_DOING);
3714         spin_lock_init(&sbi->stat_lock);
3715
3716         /* init iostat info */
3717         spin_lock_init(&sbi->iostat_lock);
3718         sbi->iostat_enable = false;
3719         sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
3720
3721         for (i = 0; i < NR_PAGE_TYPE; i++) {
3722                 int n = (i == META) ? 1: NR_TEMP_TYPE;
3723                 int j;
3724
3725                 sbi->write_io[i] =
3726                         f2fs_kmalloc(sbi,
3727                                      array_size(n,
3728                                                 sizeof(struct f2fs_bio_info)),
3729                                      GFP_KERNEL);
3730                 if (!sbi->write_io[i]) {
3731                         err = -ENOMEM;
3732                         goto free_bio_info;
3733                 }
3734
3735                 for (j = HOT; j < n; j++) {
3736                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
3737                         sbi->write_io[i][j].sbi = sbi;
3738                         sbi->write_io[i][j].bio = NULL;
3739                         spin_lock_init(&sbi->write_io[i][j].io_lock);
3740                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3741                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3742                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3743                 }
3744         }
3745
3746         init_rwsem(&sbi->cp_rwsem);
3747         init_rwsem(&sbi->quota_sem);
3748         init_waitqueue_head(&sbi->cp_wait);
3749         init_sb_info(sbi);
3750
3751         err = init_percpu_info(sbi);
3752         if (err)
3753                 goto free_bio_info;
3754
3755         if (F2FS_IO_ALIGNED(sbi)) {
3756                 sbi->write_io_dummy =
3757                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3758                 if (!sbi->write_io_dummy) {
3759                         err = -ENOMEM;
3760                         goto free_percpu;
3761                 }
3762         }
3763
3764         /* init per sbi slab cache */
3765         err = f2fs_init_xattr_caches(sbi);
3766         if (err)
3767                 goto free_io_dummy;
3768         err = f2fs_init_page_array_cache(sbi);
3769         if (err)
3770                 goto free_xattr_cache;
3771
3772         /* get an inode for meta space */
3773         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3774         if (IS_ERR(sbi->meta_inode)) {
3775                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3776                 err = PTR_ERR(sbi->meta_inode);
3777                 goto free_page_array_cache;
3778         }
3779
3780         err = f2fs_get_valid_checkpoint(sbi);
3781         if (err) {
3782                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3783                 goto free_meta_inode;
3784         }
3785
3786         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3787                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3788         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3789                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3790                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3791         }
3792
3793         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3794                 set_sbi_flag(sbi, SBI_NEED_FSCK);
3795
3796         /* Initialize device list */
3797         err = f2fs_scan_devices(sbi);
3798         if (err) {
3799                 f2fs_err(sbi, "Failed to find devices");
3800                 goto free_devices;
3801         }
3802
3803         err = f2fs_init_post_read_wq(sbi);
3804         if (err) {
3805                 f2fs_err(sbi, "Failed to initialize post read workqueue");
3806                 goto free_devices;
3807         }
3808
3809         sbi->total_valid_node_count =
3810                                 le32_to_cpu(sbi->ckpt->valid_node_count);
3811         percpu_counter_set(&sbi->total_valid_inode_count,
3812                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
3813         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3814         sbi->total_valid_block_count =
3815                                 le64_to_cpu(sbi->ckpt->valid_block_count);
3816         sbi->last_valid_block_count = sbi->total_valid_block_count;
3817         sbi->reserved_blocks = 0;
3818         sbi->current_reserved_blocks = 0;
3819         limit_reserve_root(sbi);
3820         adjust_unusable_cap_perc(sbi);
3821
3822         for (i = 0; i < NR_INODE_TYPE; i++) {
3823                 INIT_LIST_HEAD(&sbi->inode_list[i]);
3824                 spin_lock_init(&sbi->inode_lock[i]);
3825         }
3826         mutex_init(&sbi->flush_lock);
3827
3828         f2fs_init_extent_cache_info(sbi);
3829
3830         f2fs_init_ino_entry_info(sbi);
3831
3832         f2fs_init_fsync_node_info(sbi);
3833
3834         /* setup checkpoint request control and start checkpoint issue thread */
3835         f2fs_init_ckpt_req_control(sbi);
3836         if (!test_opt(sbi, DISABLE_CHECKPOINT) &&
3837                         test_opt(sbi, MERGE_CHECKPOINT)) {
3838                 err = f2fs_start_ckpt_thread(sbi);
3839                 if (err) {
3840                         f2fs_err(sbi,
3841                             "Failed to start F2FS issue_checkpoint_thread (%d)",
3842                             err);
3843                         goto stop_ckpt_thread;
3844                 }
3845         }
3846
3847         /* setup f2fs internal modules */
3848         err = f2fs_build_segment_manager(sbi);
3849         if (err) {
3850                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
3851                          err);
3852                 goto free_sm;
3853         }
3854         err = f2fs_build_node_manager(sbi);
3855         if (err) {
3856                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
3857                          err);
3858                 goto free_nm;
3859         }
3860
3861         /* For write statistics */
3862         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
3863
3864         /* Read accumulated write IO statistics if exists */
3865         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3866         if (__exist_node_summaries(sbi))
3867                 sbi->kbytes_written =
3868                         le64_to_cpu(seg_i->journal->info.kbytes_written);
3869
3870         f2fs_build_gc_manager(sbi);
3871
3872         err = f2fs_build_stats(sbi);
3873         if (err)
3874                 goto free_nm;
3875
3876         /* get an inode for node space */
3877         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3878         if (IS_ERR(sbi->node_inode)) {
3879                 f2fs_err(sbi, "Failed to read node inode");
3880                 err = PTR_ERR(sbi->node_inode);
3881                 goto free_stats;
3882         }
3883
3884         /* read root inode and dentry */
3885         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3886         if (IS_ERR(root)) {
3887                 f2fs_err(sbi, "Failed to read root inode");
3888                 err = PTR_ERR(root);
3889                 goto free_node_inode;
3890         }
3891         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3892                         !root->i_size || !root->i_nlink) {
3893                 iput(root);
3894                 err = -EINVAL;
3895                 goto free_node_inode;
3896         }
3897
3898         sb->s_root = d_make_root(root); /* allocate root dentry */
3899         if (!sb->s_root) {
3900                 err = -ENOMEM;
3901                 goto free_node_inode;
3902         }
3903
3904         err = f2fs_register_sysfs(sbi);
3905         if (err)
3906                 goto free_root_inode;
3907
3908 #ifdef CONFIG_QUOTA
3909         /* Enable quota usage during mount */
3910         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3911                 err = f2fs_enable_quotas(sb);
3912                 if (err)
3913                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
3914         }
3915 #endif
3916         /* if there are any orphan inodes, free them */
3917         err = f2fs_recover_orphan_inodes(sbi);
3918         if (err)
3919                 goto free_meta;
3920
3921         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3922                 goto reset_checkpoint;
3923
3924         /* recover fsynced data */
3925         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
3926                         !test_opt(sbi, NORECOVERY)) {
3927                 /*
3928                  * mount should be failed, when device has readonly mode, and
3929                  * previous checkpoint was not done by clean system shutdown.
3930                  */
3931                 if (f2fs_hw_is_readonly(sbi)) {
3932                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))
3933                                 f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
3934                         else
3935                                 f2fs_info(sbi, "write access unavailable, skipping recovery");
3936                         goto reset_checkpoint;
3937                 }
3938
3939                 if (need_fsck)
3940                         set_sbi_flag(sbi, SBI_NEED_FSCK);
3941
3942                 if (skip_recovery)
3943                         goto reset_checkpoint;
3944
3945                 err = f2fs_recover_fsync_data(sbi, false);
3946                 if (err < 0) {
3947                         if (err != -ENOMEM)
3948                                 skip_recovery = true;
3949                         need_fsck = true;
3950                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
3951                                  err);
3952                         goto free_meta;
3953                 }
3954         } else {
3955                 err = f2fs_recover_fsync_data(sbi, true);
3956
3957                 if (!f2fs_readonly(sb) && err > 0) {
3958                         err = -EINVAL;
3959                         f2fs_err(sbi, "Need to recover fsync data");
3960                         goto free_meta;
3961                 }
3962         }
3963
3964         /*
3965          * If the f2fs is not readonly and fsync data recovery succeeds,
3966          * check zoned block devices' write pointer consistency.
3967          */
3968         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
3969                 err = f2fs_check_write_pointer(sbi);
3970                 if (err)
3971                         goto free_meta;
3972         }
3973
3974 reset_checkpoint:
3975         f2fs_init_inmem_curseg(sbi);
3976
3977         /* f2fs_recover_fsync_data() cleared this already */
3978         clear_sbi_flag(sbi, SBI_POR_DOING);
3979
3980         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3981                 err = f2fs_disable_checkpoint(sbi);
3982                 if (err)
3983                         goto sync_free_meta;
3984         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3985                 f2fs_enable_checkpoint(sbi);
3986         }
3987
3988         /*
3989          * If filesystem is not mounted as read-only then
3990          * do start the gc_thread.
3991          */
3992         if (F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF && !f2fs_readonly(sb)) {
3993                 /* After POR, we can run background GC thread.*/
3994                 err = f2fs_start_gc_thread(sbi);
3995                 if (err)
3996                         goto sync_free_meta;
3997         }
3998         kvfree(options);
3999
4000         /* recover broken superblock */
4001         if (recovery) {
4002                 err = f2fs_commit_super(sbi, true);
4003                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4004                           sbi->valid_super_block ? 1 : 2, err);
4005         }
4006
4007         f2fs_join_shrinker(sbi);
4008
4009         f2fs_tuning_parameters(sbi);
4010
4011         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4012                     cur_cp_version(F2FS_CKPT(sbi)));
4013         f2fs_update_time(sbi, CP_TIME);
4014         f2fs_update_time(sbi, REQ_TIME);
4015         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4016         return 0;
4017
4018 sync_free_meta:
4019         /* safe to flush all the data */
4020         sync_filesystem(sbi->sb);
4021         retry_cnt = 0;
4022
4023 free_meta:
4024 #ifdef CONFIG_QUOTA
4025         f2fs_truncate_quota_inode_pages(sb);
4026         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4027                 f2fs_quota_off_umount(sbi->sb);
4028 #endif
4029         /*
4030          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4031          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4032          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4033          * falls into an infinite loop in f2fs_sync_meta_pages().
4034          */
4035         truncate_inode_pages_final(META_MAPPING(sbi));
4036         /* evict some inodes being cached by GC */
4037         evict_inodes(sb);
4038         f2fs_unregister_sysfs(sbi);
4039 free_root_inode:
4040         dput(sb->s_root);
4041         sb->s_root = NULL;
4042 free_node_inode:
4043         f2fs_release_ino_entry(sbi, true);
4044         truncate_inode_pages_final(NODE_MAPPING(sbi));
4045         iput(sbi->node_inode);
4046         sbi->node_inode = NULL;
4047 free_stats:
4048         f2fs_destroy_stats(sbi);
4049 free_nm:
4050         f2fs_destroy_node_manager(sbi);
4051 free_sm:
4052         f2fs_destroy_segment_manager(sbi);
4053         f2fs_destroy_post_read_wq(sbi);
4054 stop_ckpt_thread:
4055         f2fs_stop_ckpt_thread(sbi);
4056 free_devices:
4057         destroy_device_list(sbi);
4058         kvfree(sbi->ckpt);
4059 free_meta_inode:
4060         make_bad_inode(sbi->meta_inode);
4061         iput(sbi->meta_inode);
4062         sbi->meta_inode = NULL;
4063 free_page_array_cache:
4064         f2fs_destroy_page_array_cache(sbi);
4065 free_xattr_cache:
4066         f2fs_destroy_xattr_caches(sbi);
4067 free_io_dummy:
4068         mempool_destroy(sbi->write_io_dummy);
4069 free_percpu:
4070         destroy_percpu_info(sbi);
4071 free_bio_info:
4072         for (i = 0; i < NR_PAGE_TYPE; i++)
4073                 kvfree(sbi->write_io[i]);
4074
4075 #ifdef CONFIG_UNICODE
4076         utf8_unload(sb->s_encoding);
4077         sb->s_encoding = NULL;
4078 #endif
4079 free_options:
4080 #ifdef CONFIG_QUOTA
4081         for (i = 0; i < MAXQUOTAS; i++)
4082                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4083 #endif
4084         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4085         kvfree(options);
4086 free_sb_buf:
4087         kfree(raw_super);
4088 free_sbi:
4089         if (sbi->s_chksum_driver)
4090                 crypto_free_shash(sbi->s_chksum_driver);
4091         kfree(sbi);
4092
4093         /* give only one another chance */
4094         if (retry_cnt > 0 && skip_recovery) {
4095                 retry_cnt--;
4096                 shrink_dcache_sb(sb);
4097                 goto try_onemore;
4098         }
4099         return err;
4100 }
4101
4102 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4103                         const char *dev_name, void *data)
4104 {
4105         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4106 }
4107
4108 static void kill_f2fs_super(struct super_block *sb)
4109 {
4110         if (sb->s_root) {
4111                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4112
4113                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4114                 f2fs_stop_gc_thread(sbi);
4115                 f2fs_stop_discard_thread(sbi);
4116
4117                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4118                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4119                         struct cp_control cpc = {
4120                                 .reason = CP_UMOUNT,
4121                         };
4122                         f2fs_write_checkpoint(sbi, &cpc);
4123                 }
4124
4125                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4126                         sb->s_flags &= ~SB_RDONLY;
4127         }
4128         kill_block_super(sb);
4129 }
4130
4131 static struct file_system_type f2fs_fs_type = {
4132         .owner          = THIS_MODULE,
4133         .name           = "f2fs",
4134         .mount          = f2fs_mount,
4135         .kill_sb        = kill_f2fs_super,
4136         .fs_flags       = FS_REQUIRES_DEV,
4137 };
4138 MODULE_ALIAS_FS("f2fs");
4139
4140 static int __init init_inodecache(void)
4141 {
4142         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4143                         sizeof(struct f2fs_inode_info), 0,
4144                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4145         if (!f2fs_inode_cachep)
4146                 return -ENOMEM;
4147         return 0;
4148 }
4149
4150 static void destroy_inodecache(void)
4151 {
4152         /*
4153          * Make sure all delayed rcu free inodes are flushed before we
4154          * destroy cache.
4155          */
4156         rcu_barrier();
4157         kmem_cache_destroy(f2fs_inode_cachep);
4158 }
4159
4160 static int __init init_f2fs_fs(void)
4161 {
4162         int err;
4163
4164         if (PAGE_SIZE != F2FS_BLKSIZE) {
4165                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4166                                 PAGE_SIZE, F2FS_BLKSIZE);
4167                 return -EINVAL;
4168         }
4169
4170         err = init_inodecache();
4171         if (err)
4172                 goto fail;
4173         err = f2fs_create_node_manager_caches();
4174         if (err)
4175                 goto free_inodecache;
4176         err = f2fs_create_segment_manager_caches();
4177         if (err)
4178                 goto free_node_manager_caches;
4179         err = f2fs_create_checkpoint_caches();
4180         if (err)
4181                 goto free_segment_manager_caches;
4182         err = f2fs_create_extent_cache();
4183         if (err)
4184                 goto free_checkpoint_caches;
4185         err = f2fs_create_garbage_collection_cache();
4186         if (err)
4187                 goto free_extent_cache;
4188         err = f2fs_init_sysfs();
4189         if (err)
4190                 goto free_garbage_collection_cache;
4191         err = register_shrinker(&f2fs_shrinker_info);
4192         if (err)
4193                 goto free_sysfs;
4194         err = register_filesystem(&f2fs_fs_type);
4195         if (err)
4196                 goto free_shrinker;
4197         f2fs_create_root_stats();
4198         err = f2fs_init_post_read_processing();
4199         if (err)
4200                 goto free_root_stats;
4201         err = f2fs_init_bio_entry_cache();
4202         if (err)
4203                 goto free_post_read;
4204         err = f2fs_init_bioset();
4205         if (err)
4206                 goto free_bio_enrty_cache;
4207         err = f2fs_init_compress_mempool();
4208         if (err)
4209                 goto free_bioset;
4210         err = f2fs_init_compress_cache();
4211         if (err)
4212                 goto free_compress_mempool;
4213         return 0;
4214 free_compress_mempool:
4215         f2fs_destroy_compress_mempool();
4216 free_bioset:
4217         f2fs_destroy_bioset();
4218 free_bio_enrty_cache:
4219         f2fs_destroy_bio_entry_cache();
4220 free_post_read:
4221         f2fs_destroy_post_read_processing();
4222 free_root_stats:
4223         f2fs_destroy_root_stats();
4224         unregister_filesystem(&f2fs_fs_type);
4225 free_shrinker:
4226         unregister_shrinker(&f2fs_shrinker_info);
4227 free_sysfs:
4228         f2fs_exit_sysfs();
4229 free_garbage_collection_cache:
4230         f2fs_destroy_garbage_collection_cache();
4231 free_extent_cache:
4232         f2fs_destroy_extent_cache();
4233 free_checkpoint_caches:
4234         f2fs_destroy_checkpoint_caches();
4235 free_segment_manager_caches:
4236         f2fs_destroy_segment_manager_caches();
4237 free_node_manager_caches:
4238         f2fs_destroy_node_manager_caches();
4239 free_inodecache:
4240         destroy_inodecache();
4241 fail:
4242         return err;
4243 }
4244
4245 static void __exit exit_f2fs_fs(void)
4246 {
4247         f2fs_destroy_compress_cache();
4248         f2fs_destroy_compress_mempool();
4249         f2fs_destroy_bioset();
4250         f2fs_destroy_bio_entry_cache();
4251         f2fs_destroy_post_read_processing();
4252         f2fs_destroy_root_stats();
4253         unregister_filesystem(&f2fs_fs_type);
4254         unregister_shrinker(&f2fs_shrinker_info);
4255         f2fs_exit_sysfs();
4256         f2fs_destroy_garbage_collection_cache();
4257         f2fs_destroy_extent_cache();
4258         f2fs_destroy_checkpoint_caches();
4259         f2fs_destroy_segment_manager_caches();
4260         f2fs_destroy_node_manager_caches();
4261         destroy_inodecache();
4262 }
4263
4264 module_init(init_f2fs_fs)
4265 module_exit(exit_f2fs_fs)
4266
4267 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4268 MODULE_DESCRIPTION("Flash Friendly File System");
4269 MODULE_LICENSE("GPL");
4270