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/fs_context.h>
  12 #include <linux/sched/mm.h>
  13 #include <linux/statfs.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 #include "iostat.h"
  37
  38 #define CREATE_TRACE_POINTS
  39 #include <trace/events/f2fs.h>
  40
  41 static struct kmem_cache *f2fs_inode_cachep;
  42
  43 #ifdef CONFIG_F2FS_FAULT_INJECTION
  44
  45 const char *f2fs_fault_name[FAULT_MAX] = {
  46         [FAULT_KMALLOC]                 = "kmalloc",
  47         [FAULT_KVMALLOC]                = "kvmalloc",
  48         [FAULT_PAGE_ALLOC]              = "page alloc",
  49         [FAULT_PAGE_GET]                = "page get",
  50         [FAULT_ALLOC_BIO]               = "alloc bio(obsolete)",
  51         [FAULT_ALLOC_NID]               = "alloc nid",
  52         [FAULT_ORPHAN]                  = "orphan",
  53         [FAULT_BLOCK]                   = "no more block",
  54         [FAULT_DIR_DEPTH]               = "too big dir depth",
  55         [FAULT_EVICT_INODE]             = "evict_inode fail",
  56         [FAULT_TRUNCATE]                = "truncate fail",
  57         [FAULT_READ_IO]                 = "read IO error",
  58         [FAULT_CHECKPOINT]              = "checkpoint error",
  59         [FAULT_DISCARD]                 = "discard error",
  60         [FAULT_WRITE_IO]                = "write IO error",
  61         [FAULT_SLAB_ALLOC]              = "slab alloc",
  62         [FAULT_DQUOT_INIT]              = "dquot initialize",
  63         [FAULT_LOCK_OP]                 = "lock_op",
  64         [FAULT_BLKADDR_VALIDITY]        = "invalid blkaddr",
  65         [FAULT_BLKADDR_CONSISTENCE]     = "inconsistent blkaddr",
  66         [FAULT_NO_SEGMENT]              = "no free segment",
  67         [FAULT_INCONSISTENT_FOOTER]     = "inconsistent footer",
  68         [FAULT_TIMEOUT]                 = "timeout",
  69         [FAULT_VMALLOC]                 = "vmalloc",
  70 };
  71
  72 int f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned long rate,
  73                                 unsigned long type, enum fault_option fo)
  74 {
  75         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  76
  77         if (fo & FAULT_ALL) {
  78                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  79                 return 0;
  80         }
  81
  82         if (fo & FAULT_RATE) {
  83                 if (rate > INT_MAX)
  84                         return -EINVAL;
  85                 atomic_set(&ffi->inject_ops, 0);
  86                 ffi->inject_rate = (int)rate;
  87                 f2fs_info(sbi, "build fault injection rate: %lu", rate);
  88         }
  89
  90         if (fo & FAULT_TYPE) {
  91                 if (type >= BIT(FAULT_MAX))
  92                         return -EINVAL;
  93                 ffi->inject_type = (unsigned int)type;
  94                 f2fs_info(sbi, "build fault injection type: 0x%lx", type);
  95         }
  96
  97         return 0;
  98 }
  99 #endif
 100
 101 /* f2fs-wide shrinker description */
 102 static struct shrinker *f2fs_shrinker_info;
 103
 104 static int __init f2fs_init_shrinker(void)
 105 {
 106         f2fs_shrinker_info = shrinker_alloc(0, "f2fs-shrinker");
 107         if (!f2fs_shrinker_info)
 108                 return -ENOMEM;
 109
 110         f2fs_shrinker_info->count_objects = f2fs_shrink_count;
 111         f2fs_shrinker_info->scan_objects = f2fs_shrink_scan;
 112
 113         shrinker_register(f2fs_shrinker_info);
 114
 115         return 0;
 116 }
 117
 118 static void f2fs_exit_shrinker(void)
 119 {
 120         shrinker_free(f2fs_shrinker_info);
 121 }
 122
 123 enum {
 124         Opt_gc_background,
 125         Opt_disable_roll_forward,
 126         Opt_norecovery,
 127         Opt_discard,
 128         Opt_nodiscard,
 129         Opt_noheap,
 130         Opt_heap,
 131         Opt_user_xattr,
 132         Opt_nouser_xattr,
 133         Opt_acl,
 134         Opt_noacl,
 135         Opt_active_logs,
 136         Opt_disable_ext_identify,
 137         Opt_inline_xattr,
 138         Opt_noinline_xattr,
 139         Opt_inline_xattr_size,
 140         Opt_inline_data,
 141         Opt_inline_dentry,
 142         Opt_noinline_dentry,
 143         Opt_flush_merge,
 144         Opt_noflush_merge,
 145         Opt_barrier,
 146         Opt_nobarrier,
 147         Opt_fastboot,
 148         Opt_extent_cache,
 149         Opt_noextent_cache,
 150         Opt_noinline_data,
 151         Opt_data_flush,
 152         Opt_reserve_root,
 153         Opt_resgid,
 154         Opt_resuid,
 155         Opt_mode,
 156         Opt_fault_injection,
 157         Opt_fault_type,
 158         Opt_lazytime,
 159         Opt_nolazytime,
 160         Opt_quota,
 161         Opt_noquota,
 162         Opt_usrquota,
 163         Opt_grpquota,
 164         Opt_prjquota,
 165         Opt_usrjquota,
 166         Opt_grpjquota,
 167         Opt_prjjquota,
 168         Opt_offusrjquota,
 169         Opt_offgrpjquota,
 170         Opt_offprjjquota,
 171         Opt_jqfmt_vfsold,
 172         Opt_jqfmt_vfsv0,
 173         Opt_jqfmt_vfsv1,
 174         Opt_alloc,
 175         Opt_fsync,
 176         Opt_test_dummy_encryption,
 177         Opt_inlinecrypt,
 178         Opt_checkpoint_disable,
 179         Opt_checkpoint_disable_cap,
 180         Opt_checkpoint_disable_cap_perc,
 181         Opt_checkpoint_enable,
 182         Opt_checkpoint_merge,
 183         Opt_nocheckpoint_merge,
 184         Opt_compress_algorithm,
 185         Opt_compress_log_size,
 186         Opt_compress_extension,
 187         Opt_nocompress_extension,
 188         Opt_compress_chksum,
 189         Opt_compress_mode,
 190         Opt_compress_cache,
 191         Opt_atgc,
 192         Opt_gc_merge,
 193         Opt_nogc_merge,
 194         Opt_discard_unit,
 195         Opt_memory_mode,
 196         Opt_age_extent_cache,
 197         Opt_errors,
 198         Opt_nat_bits,
 199         Opt_err,
 200 };
 201
 202 static match_table_t f2fs_tokens = {
 203         {Opt_gc_background, "background_gc=%s"},
 204         {Opt_disable_roll_forward, "disable_roll_forward"},
 205         {Opt_norecovery, "norecovery"},
 206         {Opt_discard, "discard"},
 207         {Opt_nodiscard, "nodiscard"},
 208         {Opt_noheap, "no_heap"},
 209         {Opt_heap, "heap"},
 210         {Opt_user_xattr, "user_xattr"},
 211         {Opt_nouser_xattr, "nouser_xattr"},
 212         {Opt_acl, "acl"},
 213         {Opt_noacl, "noacl"},
 214         {Opt_active_logs, "active_logs=%u"},
 215         {Opt_disable_ext_identify, "disable_ext_identify"},
 216         {Opt_inline_xattr, "inline_xattr"},
 217         {Opt_noinline_xattr, "noinline_xattr"},
 218         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 219         {Opt_inline_data, "inline_data"},
 220         {Opt_inline_dentry, "inline_dentry"},
 221         {Opt_noinline_dentry, "noinline_dentry"},
 222         {Opt_flush_merge, "flush_merge"},
 223         {Opt_noflush_merge, "noflush_merge"},
 224         {Opt_barrier, "barrier"},
 225         {Opt_nobarrier, "nobarrier"},
 226         {Opt_fastboot, "fastboot"},
 227         {Opt_extent_cache, "extent_cache"},
 228         {Opt_noextent_cache, "noextent_cache"},
 229         {Opt_noinline_data, "noinline_data"},
 230         {Opt_data_flush, "data_flush"},
 231         {Opt_reserve_root, "reserve_root=%u"},
 232         {Opt_resgid, "resgid=%u"},
 233         {Opt_resuid, "resuid=%u"},
 234         {Opt_mode, "mode=%s"},
 235         {Opt_fault_injection, "fault_injection=%u"},
 236         {Opt_fault_type, "fault_type=%u"},
 237         {Opt_lazytime, "lazytime"},
 238         {Opt_nolazytime, "nolazytime"},
 239         {Opt_quota, "quota"},
 240         {Opt_noquota, "noquota"},
 241         {Opt_usrquota, "usrquota"},
 242         {Opt_grpquota, "grpquota"},
 243         {Opt_prjquota, "prjquota"},
 244         {Opt_usrjquota, "usrjquota=%s"},
 245         {Opt_grpjquota, "grpjquota=%s"},
 246         {Opt_prjjquota, "prjjquota=%s"},
 247         {Opt_offusrjquota, "usrjquota="},
 248         {Opt_offgrpjquota, "grpjquota="},
 249         {Opt_offprjjquota, "prjjquota="},
 250         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 251         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 252         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 253         {Opt_alloc, "alloc_mode=%s"},
 254         {Opt_fsync, "fsync_mode=%s"},
 255         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 256         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 257         {Opt_inlinecrypt, "inlinecrypt"},
 258         {Opt_checkpoint_disable, "checkpoint=disable"},
 259         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 260         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 261         {Opt_checkpoint_enable, "checkpoint=enable"},
 262         {Opt_checkpoint_merge, "checkpoint_merge"},
 263         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 264         {Opt_compress_algorithm, "compress_algorithm=%s"},
 265         {Opt_compress_log_size, "compress_log_size=%u"},
 266         {Opt_compress_extension, "compress_extension=%s"},
 267         {Opt_nocompress_extension, "nocompress_extension=%s"},
 268         {Opt_compress_chksum, "compress_chksum"},
 269         {Opt_compress_mode, "compress_mode=%s"},
 270         {Opt_compress_cache, "compress_cache"},
 271         {Opt_atgc, "atgc"},
 272         {Opt_gc_merge, "gc_merge"},
 273         {Opt_nogc_merge, "nogc_merge"},
 274         {Opt_discard_unit, "discard_unit=%s"},
 275         {Opt_memory_mode, "memory=%s"},
 276         {Opt_age_extent_cache, "age_extent_cache"},
 277         {Opt_errors, "errors=%s"},
 278         {Opt_nat_bits, "nat_bits"},
 279         {Opt_err, NULL},
 280 };
 281
 282 void f2fs_printk(struct f2fs_sb_info *sbi, bool limit_rate,
 283                                                 const char *fmt, ...)
 284 {
 285         struct va_format vaf;
 286         va_list args;
 287         int level;
 288
 289         va_start(args, fmt);
 290
 291         level = printk_get_level(fmt);
 292         vaf.fmt = printk_skip_level(fmt);
 293         vaf.va = &args;
 294         if (limit_rate)
 295                 printk_ratelimited("%c%cF2FS-fs (%s): %pV\n",
 296                         KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 297         else
 298                 printk("%c%cF2FS-fs (%s): %pV\n",
 299                         KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 300
 301         va_end(args);
 302 }
 303
 304 #if IS_ENABLED(CONFIG_UNICODE)
 305 static const struct f2fs_sb_encodings {
 306         __u16 magic;
 307         char *name;
 308         unsigned int version;
 309 } f2fs_sb_encoding_map[] = {
 310         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 311 };
 312
 313 static const struct f2fs_sb_encodings *
 314 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 315 {
 316         __u16 magic = le16_to_cpu(sb->s_encoding);
 317         int i;
 318
 319         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 320                 if (magic == f2fs_sb_encoding_map[i].magic)
 321                         return &f2fs_sb_encoding_map[i];
 322
 323         return NULL;
 324 }
 325
 326 struct kmem_cache *f2fs_cf_name_slab;
 327 static int __init f2fs_create_casefold_cache(void)
 328 {
 329         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 330                                                    F2FS_NAME_LEN);
 331         return f2fs_cf_name_slab ? 0 : -ENOMEM;
 332 }
 333
 334 static void f2fs_destroy_casefold_cache(void)
 335 {
 336         kmem_cache_destroy(f2fs_cf_name_slab);
 337 }
 338 #else
 339 static int __init f2fs_create_casefold_cache(void) { return 0; }
 340 static void f2fs_destroy_casefold_cache(void) { }
 341 #endif
 342
 343 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 344 {
 345         block_t limit = min((sbi->user_block_count >> 3),
 346                         sbi->user_block_count - sbi->reserved_blocks);
 347
 348         /* limit is 12.5% */
 349         if (test_opt(sbi, RESERVE_ROOT) &&
 350                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 351                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 352                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 353                           F2FS_OPTION(sbi).root_reserved_blocks);
 354         }
 355         if (!test_opt(sbi, RESERVE_ROOT) &&
 356                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 357                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 358                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 359                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 360                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 361                           from_kuid_munged(&init_user_ns,
 362                                            F2FS_OPTION(sbi).s_resuid),
 363                           from_kgid_munged(&init_user_ns,
 364                                            F2FS_OPTION(sbi).s_resgid));
 365 }
 366
 367 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 368 {
 369         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 370                 return;
 371
 372         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 373                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 374         else
 375                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 376                                         F2FS_OPTION(sbi).unusable_cap_perc;
 377
 378         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 379                         F2FS_OPTION(sbi).unusable_cap,
 380                         F2FS_OPTION(sbi).unusable_cap_perc);
 381 }
 382
 383 static void init_once(void *foo)
 384 {
 385         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 386
 387         inode_init_once(&fi->vfs_inode);
 388 }
 389
 390 #ifdef CONFIG_QUOTA
 391 static const char * const quotatypes[] = INITQFNAMES;
 392 #define QTYPE2NAME(t) (quotatypes[t])
 393 static int f2fs_set_qf_name(struct f2fs_sb_info *sbi, int qtype,
 394                                                         substring_t *args)
 395 {
 396         struct super_block *sb = sbi->sb;
 397         char *qname;
 398         int ret = -EINVAL;
 399
 400         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 401                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 402                 return -EINVAL;
 403         }
 404         if (f2fs_sb_has_quota_ino(sbi)) {
 405                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 406                 return 0;
 407         }
 408
 409         qname = match_strdup(args);
 410         if (!qname) {
 411                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 412                 return -ENOMEM;
 413         }
 414         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 415                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 416                         ret = 0;
 417                 else
 418                         f2fs_err(sbi, "%s quota file already specified",
 419                                  QTYPE2NAME(qtype));
 420                 goto errout;
 421         }
 422         if (strchr(qname, '/')) {
 423                 f2fs_err(sbi, "quotafile must be on filesystem root");
 424                 goto errout;
 425         }
 426         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 427         set_opt(sbi, QUOTA);
 428         return 0;
 429 errout:
 430         kfree(qname);
 431         return ret;
 432 }
 433
 434 static int f2fs_clear_qf_name(struct f2fs_sb_info *sbi, int qtype)
 435 {
 436         struct super_block *sb = sbi->sb;
 437
 438         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 439                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 440                 return -EINVAL;
 441         }
 442         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 443         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 444         return 0;
 445 }
 446
 447 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 448 {
 449         /*
 450          * We do the test below only for project quotas. 'usrquota' and
 451          * 'grpquota' mount options are allowed even without quota feature
 452          * to support legacy quotas in quota files.
 453          */
 454         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 455                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 456                 return -1;
 457         }
 458         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 459                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 460                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 461                 if (test_opt(sbi, USRQUOTA) &&
 462                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 463                         clear_opt(sbi, USRQUOTA);
 464
 465                 if (test_opt(sbi, GRPQUOTA) &&
 466                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 467                         clear_opt(sbi, GRPQUOTA);
 468
 469                 if (test_opt(sbi, PRJQUOTA) &&
 470                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 471                         clear_opt(sbi, PRJQUOTA);
 472
 473                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 474                                 test_opt(sbi, PRJQUOTA)) {
 475                         f2fs_err(sbi, "old and new quota format mixing");
 476                         return -1;
 477                 }
 478
 479                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 480                         f2fs_err(sbi, "journaled quota format not specified");
 481                         return -1;
 482                 }
 483         }
 484
 485         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 486                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 487                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 488         }
 489         return 0;
 490 }
 491 #endif
 492
 493 static int f2fs_set_test_dummy_encryption(struct f2fs_sb_info *sbi,
 494                                           const char *opt,
 495                                           const substring_t *arg,
 496                                           bool is_remount)
 497 {
 498         struct fs_parameter param = {
 499                 .type = fs_value_is_string,
 500                 .string = arg->from ? arg->from : "",
 501         };
 502         struct fscrypt_dummy_policy *policy =
 503                 &F2FS_OPTION(sbi).dummy_enc_policy;
 504         int err;
 505
 506         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 507                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 508                 return -EINVAL;
 509         }
 510
 511         if (!f2fs_sb_has_encrypt(sbi)) {
 512                 f2fs_err(sbi, "Encrypt feature is off");
 513                 return -EINVAL;
 514         }
 515
 516         /*
 517          * This mount option is just for testing, and it's not worthwhile to
 518          * implement the extra complexity (e.g. RCU protection) that would be
 519          * needed to allow it to be set or changed during remount.  We do allow
 520          * it to be specified during remount, but only if there is no change.
 521          */
 522         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 523                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 524                 return -EINVAL;
 525         }
 526
 527         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 528         if (err) {
 529                 if (err == -EEXIST)
 530                         f2fs_warn(sbi,
 531                                   "Can't change test_dummy_encryption on remount");
 532                 else if (err == -EINVAL)
 533                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 534                                   opt);
 535                 else
 536                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 537                                   opt, err);
 538                 return -EINVAL;
 539         }
 540         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 541         return 0;
 542 }
 543
 544 #ifdef CONFIG_F2FS_FS_COMPRESSION
 545 static bool is_compress_extension_exist(struct f2fs_sb_info *sbi,
 546                                         const char *new_ext, bool is_ext)
 547 {
 548         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 549         int ext_cnt;
 550         int i;
 551
 552         if (is_ext) {
 553                 ext = F2FS_OPTION(sbi).extensions;
 554                 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 555         } else {
 556                 ext = F2FS_OPTION(sbi).noextensions;
 557                 ext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 558         }
 559
 560         for (i = 0; i < ext_cnt; i++) {
 561                 if (!strcasecmp(new_ext, ext[i]))
 562                         return true;
 563         }
 564
 565         return false;
 566 }
 567
 568 /*
 569  * 1. The same extension name cannot not appear in both compress and non-compress extension
 570  * at the same time.
 571  * 2. If the compress extension specifies all files, the types specified by the non-compress
 572  * extension will be treated as special cases and will not be compressed.
 573  * 3. Don't allow the non-compress extension specifies all files.
 574  */
 575 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 576 {
 577         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 578         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 579         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 580
 581         ext = F2FS_OPTION(sbi).extensions;
 582         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 583         noext = F2FS_OPTION(sbi).noextensions;
 584         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 585
 586         if (!noext_cnt)
 587                 return 0;
 588
 589         for (no_index = 0; no_index < noext_cnt; no_index++) {
 590                 if (!strcasecmp("*", noext[no_index])) {
 591                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 592                         return -EINVAL;
 593                 }
 594                 for (index = 0; index < ext_cnt; index++) {
 595                         if (!strcasecmp(ext[index], noext[no_index])) {
 596                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 597                                                 ext[index]);
 598                                 return -EINVAL;
 599                         }
 600                 }
 601         }
 602         return 0;
 603 }
 604
 605 #ifdef CONFIG_F2FS_FS_LZ4
 606 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 607 {
 608 #ifdef CONFIG_F2FS_FS_LZ4HC
 609         unsigned int level;
 610
 611         if (strlen(str) == 3) {
 612                 F2FS_OPTION(sbi).compress_level = 0;
 613                 return 0;
 614         }
 615
 616         str += 3;
 617
 618         if (str[0] != ':') {
 619                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 620                 return -EINVAL;
 621         }
 622         if (kstrtouint(str + 1, 10, &level))
 623                 return -EINVAL;
 624
 625         if (!f2fs_is_compress_level_valid(COMPRESS_LZ4, level)) {
 626                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 627                 return -EINVAL;
 628         }
 629
 630         F2FS_OPTION(sbi).compress_level = level;
 631         return 0;
 632 #else
 633         if (strlen(str) == 3) {
 634                 F2FS_OPTION(sbi).compress_level = 0;
 635                 return 0;
 636         }
 637         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 638         return -EINVAL;
 639 #endif
 640 }
 641 #endif
 642
 643 #ifdef CONFIG_F2FS_FS_ZSTD
 644 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 645 {
 646         int level;
 647         int len = 4;
 648
 649         if (strlen(str) == len) {
 650                 F2FS_OPTION(sbi).compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
 651                 return 0;
 652         }
 653
 654         str += len;
 655
 656         if (str[0] != ':') {
 657                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 658                 return -EINVAL;
 659         }
 660         if (kstrtoint(str + 1, 10, &level))
 661                 return -EINVAL;
 662
 663         /* f2fs does not support negative compress level now */
 664         if (level < 0) {
 665                 f2fs_info(sbi, "do not support negative compress level: %d", level);
 666                 return -ERANGE;
 667         }
 668
 669         if (!f2fs_is_compress_level_valid(COMPRESS_ZSTD, level)) {
 670                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 671                 return -EINVAL;
 672         }
 673
 674         F2FS_OPTION(sbi).compress_level = level;
 675         return 0;
 676 }
 677 #endif
 678 #endif
 679
 680 static int parse_options(struct f2fs_sb_info *sbi, char *options, bool is_remount)
 681 {
 682         substring_t args[MAX_OPT_ARGS];
 683 #ifdef CONFIG_F2FS_FS_COMPRESSION
 684         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 685         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 686         int ext_cnt, noext_cnt;
 687 #endif
 688         char *p, *name;
 689         int arg = 0;
 690         kuid_t uid;
 691         kgid_t gid;
 692         int ret;
 693
 694         if (!options)
 695                 return 0;
 696
 697         while ((p = strsep(&options, ",")) != NULL) {
 698                 int token;
 699
 700                 if (!*p)
 701                         continue;
 702                 /*
 703                  * Initialize args struct so we know whether arg was
 704                  * found; some options take optional arguments.
 705                  */
 706                 args[0].to = args[0].from = NULL;
 707                 token = match_token(p, f2fs_tokens, args);
 708
 709                 switch (token) {
 710                 case Opt_gc_background:
 711                         name = match_strdup(&args[0]);
 712
 713                         if (!name)
 714                                 return -ENOMEM;
 715                         if (!strcmp(name, "on")) {
 716                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 717                         } else if (!strcmp(name, "off")) {
 718                                 if (f2fs_sb_has_blkzoned(sbi)) {
 719                                         f2fs_warn(sbi, "zoned devices need bggc");
 720                                         kfree(name);
 721                                         return -EINVAL;
 722                                 }
 723                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 724                         } else if (!strcmp(name, "sync")) {
 725                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 726                         } else {
 727                                 kfree(name);
 728                                 return -EINVAL;
 729                         }
 730                         kfree(name);
 731                         break;
 732                 case Opt_disable_roll_forward:
 733                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 734                         break;
 735                 case Opt_norecovery:
 736                         /* requires ro mount, checked in f2fs_default_check */
 737                         set_opt(sbi, NORECOVERY);
 738                         break;
 739                 case Opt_discard:
 740                         if (!f2fs_hw_support_discard(sbi)) {
 741                                 f2fs_warn(sbi, "device does not support discard");
 742                                 break;
 743                         }
 744                         set_opt(sbi, DISCARD);
 745                         break;
 746                 case Opt_nodiscard:
 747                         if (f2fs_hw_should_discard(sbi)) {
 748                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 749                                 return -EINVAL;
 750                         }
 751                         clear_opt(sbi, DISCARD);
 752                         break;
 753                 case Opt_noheap:
 754                 case Opt_heap:
 755                         f2fs_warn(sbi, "heap/no_heap options were deprecated");
 756                         break;
 757 #ifdef CONFIG_F2FS_FS_XATTR
 758                 case Opt_user_xattr:
 759                         set_opt(sbi, XATTR_USER);
 760                         break;
 761                 case Opt_nouser_xattr:
 762                         clear_opt(sbi, XATTR_USER);
 763                         break;
 764                 case Opt_inline_xattr:
 765                         set_opt(sbi, INLINE_XATTR);
 766                         break;
 767                 case Opt_noinline_xattr:
 768                         clear_opt(sbi, INLINE_XATTR);
 769                         break;
 770                 case Opt_inline_xattr_size:
 771                         if (args->from && match_int(args, &arg))
 772                                 return -EINVAL;
 773                         set_opt(sbi, INLINE_XATTR_SIZE);
 774                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 775                         break;
 776 #else
 777                 case Opt_user_xattr:
 778                 case Opt_nouser_xattr:
 779                 case Opt_inline_xattr:
 780                 case Opt_noinline_xattr:
 781                 case Opt_inline_xattr_size:
 782                         f2fs_info(sbi, "xattr options not supported");
 783                         break;
 784 #endif
 785 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 786                 case Opt_acl:
 787                         set_opt(sbi, POSIX_ACL);
 788                         break;
 789                 case Opt_noacl:
 790                         clear_opt(sbi, POSIX_ACL);
 791                         break;
 792 #else
 793                 case Opt_acl:
 794                 case Opt_noacl:
 795                         f2fs_info(sbi, "acl options not supported");
 796                         break;
 797 #endif
 798                 case Opt_active_logs:
 799                         if (args->from && match_int(args, &arg))
 800                                 return -EINVAL;
 801                         if (arg != 2 && arg != 4 &&
 802                                 arg != NR_CURSEG_PERSIST_TYPE)
 803                                 return -EINVAL;
 804                         F2FS_OPTION(sbi).active_logs = arg;
 805                         break;
 806                 case Opt_disable_ext_identify:
 807                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 808                         break;
 809                 case Opt_inline_data:
 810                         set_opt(sbi, INLINE_DATA);
 811                         break;
 812                 case Opt_inline_dentry:
 813                         set_opt(sbi, INLINE_DENTRY);
 814                         break;
 815                 case Opt_noinline_dentry:
 816                         clear_opt(sbi, INLINE_DENTRY);
 817                         break;
 818                 case Opt_flush_merge:
 819                         set_opt(sbi, FLUSH_MERGE);
 820                         break;
 821                 case Opt_noflush_merge:
 822                         clear_opt(sbi, FLUSH_MERGE);
 823                         break;
 824                 case Opt_nobarrier:
 825                         set_opt(sbi, NOBARRIER);
 826                         break;
 827                 case Opt_barrier:
 828                         clear_opt(sbi, NOBARRIER);
 829                         break;
 830                 case Opt_fastboot:
 831                         set_opt(sbi, FASTBOOT);
 832                         break;
 833                 case Opt_extent_cache:
 834                         set_opt(sbi, READ_EXTENT_CACHE);
 835                         break;
 836                 case Opt_noextent_cache:
 837                         if (f2fs_sb_has_device_alias(sbi)) {
 838                                 f2fs_err(sbi, "device aliasing requires extent cache");
 839                                 return -EINVAL;
 840                         }
 841                         clear_opt(sbi, READ_EXTENT_CACHE);
 842                         break;
 843                 case Opt_noinline_data:
 844                         clear_opt(sbi, INLINE_DATA);
 845                         break;
 846                 case Opt_data_flush:
 847                         set_opt(sbi, DATA_FLUSH);
 848                         break;
 849                 case Opt_reserve_root:
 850                         if (args->from && match_int(args, &arg))
 851                                 return -EINVAL;
 852                         if (test_opt(sbi, RESERVE_ROOT)) {
 853                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 854                                           F2FS_OPTION(sbi).root_reserved_blocks);
 855                         } else {
 856                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 857                                 set_opt(sbi, RESERVE_ROOT);
 858                         }
 859                         break;
 860                 case Opt_resuid:
 861                         if (args->from && match_int(args, &arg))
 862                                 return -EINVAL;
 863                         uid = make_kuid(current_user_ns(), arg);
 864                         if (!uid_valid(uid)) {
 865                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 866                                 return -EINVAL;
 867                         }
 868                         F2FS_OPTION(sbi).s_resuid = uid;
 869                         break;
 870                 case Opt_resgid:
 871                         if (args->from && match_int(args, &arg))
 872                                 return -EINVAL;
 873                         gid = make_kgid(current_user_ns(), arg);
 874                         if (!gid_valid(gid)) {
 875                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 876                                 return -EINVAL;
 877                         }
 878                         F2FS_OPTION(sbi).s_resgid = gid;
 879                         break;
 880                 case Opt_mode:
 881                         name = match_strdup(&args[0]);
 882
 883                         if (!name)
 884                                 return -ENOMEM;
 885                         if (!strcmp(name, "adaptive")) {
 886                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 887                         } else if (!strcmp(name, "lfs")) {
 888                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 889                         } else if (!strcmp(name, "fragment:segment")) {
 890                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 891                         } else if (!strcmp(name, "fragment:block")) {
 892                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 893                         } else {
 894                                 kfree(name);
 895                                 return -EINVAL;
 896                         }
 897                         kfree(name);
 898                         break;
 899 #ifdef CONFIG_F2FS_FAULT_INJECTION
 900                 case Opt_fault_injection:
 901                         if (args->from && match_int(args, &arg))
 902                                 return -EINVAL;
 903                         if (f2fs_build_fault_attr(sbi, arg, 0, FAULT_RATE))
 904                                 return -EINVAL;
 905                         set_opt(sbi, FAULT_INJECTION);
 906                         break;
 907
 908                 case Opt_fault_type:
 909                         if (args->from && match_int(args, &arg))
 910                                 return -EINVAL;
 911                         if (f2fs_build_fault_attr(sbi, 0, arg, FAULT_TYPE))
 912                                 return -EINVAL;
 913                         set_opt(sbi, FAULT_INJECTION);
 914                         break;
 915 #else
 916                 case Opt_fault_injection:
 917                 case Opt_fault_type:
 918                         f2fs_info(sbi, "fault injection options not supported");
 919                         break;
 920 #endif
 921                 case Opt_lazytime:
 922                         set_opt(sbi, LAZYTIME);
 923                         break;
 924                 case Opt_nolazytime:
 925                         clear_opt(sbi, LAZYTIME);
 926                         break;
 927 #ifdef CONFIG_QUOTA
 928                 case Opt_quota:
 929                 case Opt_usrquota:
 930                         set_opt(sbi, USRQUOTA);
 931                         break;
 932                 case Opt_grpquota:
 933                         set_opt(sbi, GRPQUOTA);
 934                         break;
 935                 case Opt_prjquota:
 936                         set_opt(sbi, PRJQUOTA);
 937                         break;
 938                 case Opt_usrjquota:
 939                         ret = f2fs_set_qf_name(sbi, USRQUOTA, &args[0]);
 940                         if (ret)
 941                                 return ret;
 942                         break;
 943                 case Opt_grpjquota:
 944                         ret = f2fs_set_qf_name(sbi, GRPQUOTA, &args[0]);
 945                         if (ret)
 946                                 return ret;
 947                         break;
 948                 case Opt_prjjquota:
 949                         ret = f2fs_set_qf_name(sbi, PRJQUOTA, &args[0]);
 950                         if (ret)
 951                                 return ret;
 952                         break;
 953                 case Opt_offusrjquota:
 954                         ret = f2fs_clear_qf_name(sbi, USRQUOTA);
 955                         if (ret)
 956                                 return ret;
 957                         break;
 958                 case Opt_offgrpjquota:
 959                         ret = f2fs_clear_qf_name(sbi, GRPQUOTA);
 960                         if (ret)
 961                                 return ret;
 962                         break;
 963                 case Opt_offprjjquota:
 964                         ret = f2fs_clear_qf_name(sbi, PRJQUOTA);
 965                         if (ret)
 966                                 return ret;
 967                         break;
 968                 case Opt_jqfmt_vfsold:
 969                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 970                         break;
 971                 case Opt_jqfmt_vfsv0:
 972                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 973                         break;
 974                 case Opt_jqfmt_vfsv1:
 975                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 976                         break;
 977                 case Opt_noquota:
 978                         clear_opt(sbi, QUOTA);
 979                         clear_opt(sbi, USRQUOTA);
 980                         clear_opt(sbi, GRPQUOTA);
 981                         clear_opt(sbi, PRJQUOTA);
 982                         break;
 983 #else
 984                 case Opt_quota:
 985                 case Opt_usrquota:
 986                 case Opt_grpquota:
 987                 case Opt_prjquota:
 988                 case Opt_usrjquota:
 989                 case Opt_grpjquota:
 990                 case Opt_prjjquota:
 991                 case Opt_offusrjquota:
 992                 case Opt_offgrpjquota:
 993                 case Opt_offprjjquota:
 994                 case Opt_jqfmt_vfsold:
 995                 case Opt_jqfmt_vfsv0:
 996                 case Opt_jqfmt_vfsv1:
 997                 case Opt_noquota:
 998                         f2fs_info(sbi, "quota operations not supported");
 999                         break;
1000 #endif
1001                 case Opt_alloc:
1002                         name = match_strdup(&args[0]);
1003                         if (!name)
1004                                 return -ENOMEM;
1005
1006                         if (!strcmp(name, "default")) {
1007                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1008                         } else if (!strcmp(name, "reuse")) {
1009                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1010                         } else {
1011                                 kfree(name);
1012                                 return -EINVAL;
1013                         }
1014                         kfree(name);
1015                         break;
1016                 case Opt_fsync:
1017                         name = match_strdup(&args[0]);
1018                         if (!name)
1019                                 return -ENOMEM;
1020                         if (!strcmp(name, "posix")) {
1021                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1022                         } else if (!strcmp(name, "strict")) {
1023                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1024                         } else if (!strcmp(name, "nobarrier")) {
1025                                 F2FS_OPTION(sbi).fsync_mode =
1026                                                         FSYNC_MODE_NOBARRIER;
1027                         } else {
1028                                 kfree(name);
1029                                 return -EINVAL;
1030                         }
1031                         kfree(name);
1032                         break;
1033                 case Opt_test_dummy_encryption:
1034                         ret = f2fs_set_test_dummy_encryption(sbi, p, &args[0],
1035                                                              is_remount);
1036                         if (ret)
1037                                 return ret;
1038                         break;
1039                 case Opt_inlinecrypt:
1040 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1041                         set_opt(sbi, INLINECRYPT);
1042 #else
1043                         f2fs_info(sbi, "inline encryption not supported");
1044 #endif
1045                         break;
1046                 case Opt_checkpoint_disable_cap_perc:
1047                         if (args->from && match_int(args, &arg))
1048                                 return -EINVAL;
1049                         if (arg < 0 || arg > 100)
1050                                 return -EINVAL;
1051                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1052                         set_opt(sbi, DISABLE_CHECKPOINT);
1053                         break;
1054                 case Opt_checkpoint_disable_cap:
1055                         if (args->from && match_int(args, &arg))
1056                                 return -EINVAL;
1057                         F2FS_OPTION(sbi).unusable_cap = arg;
1058                         set_opt(sbi, DISABLE_CHECKPOINT);
1059                         break;
1060                 case Opt_checkpoint_disable:
1061                         set_opt(sbi, DISABLE_CHECKPOINT);
1062                         break;
1063                 case Opt_checkpoint_enable:
1064                         clear_opt(sbi, DISABLE_CHECKPOINT);
1065                         break;
1066                 case Opt_checkpoint_merge:
1067                         set_opt(sbi, MERGE_CHECKPOINT);
1068                         break;
1069                 case Opt_nocheckpoint_merge:
1070                         clear_opt(sbi, MERGE_CHECKPOINT);
1071                         break;
1072 #ifdef CONFIG_F2FS_FS_COMPRESSION
1073                 case Opt_compress_algorithm:
1074                         if (!f2fs_sb_has_compression(sbi)) {
1075                                 f2fs_info(sbi, "Image doesn't support compression");
1076                                 break;
1077                         }
1078                         name = match_strdup(&args[0]);
1079                         if (!name)
1080                                 return -ENOMEM;
1081                         if (!strcmp(name, "lzo")) {
1082 #ifdef CONFIG_F2FS_FS_LZO
1083                                 F2FS_OPTION(sbi).compress_level = 0;
1084                                 F2FS_OPTION(sbi).compress_algorithm =
1085                                                                 COMPRESS_LZO;
1086 #else
1087                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1088 #endif
1089                         } else if (!strncmp(name, "lz4", 3)) {
1090 #ifdef CONFIG_F2FS_FS_LZ4
1091                                 ret = f2fs_set_lz4hc_level(sbi, name);
1092                                 if (ret) {
1093                                         kfree(name);
1094                                         return -EINVAL;
1095                                 }
1096                                 F2FS_OPTION(sbi).compress_algorithm =
1097                                                                 COMPRESS_LZ4;
1098 #else
1099                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1100 #endif
1101                         } else if (!strncmp(name, "zstd", 4)) {
1102 #ifdef CONFIG_F2FS_FS_ZSTD
1103                                 ret = f2fs_set_zstd_level(sbi, name);
1104                                 if (ret) {
1105                                         kfree(name);
1106                                         return -EINVAL;
1107                                 }
1108                                 F2FS_OPTION(sbi).compress_algorithm =
1109                                                                 COMPRESS_ZSTD;
1110 #else
1111                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1112 #endif
1113                         } else if (!strcmp(name, "lzo-rle")) {
1114 #ifdef CONFIG_F2FS_FS_LZORLE
1115                                 F2FS_OPTION(sbi).compress_level = 0;
1116                                 F2FS_OPTION(sbi).compress_algorithm =
1117                                                                 COMPRESS_LZORLE;
1118 #else
1119                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1120 #endif
1121                         } else {
1122                                 kfree(name);
1123                                 return -EINVAL;
1124                         }
1125                         kfree(name);
1126                         break;
1127                 case Opt_compress_log_size:
1128                         if (!f2fs_sb_has_compression(sbi)) {
1129                                 f2fs_info(sbi, "Image doesn't support compression");
1130                                 break;
1131                         }
1132                         if (args->from && match_int(args, &arg))
1133                                 return -EINVAL;
1134                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1135                                 arg > MAX_COMPRESS_LOG_SIZE) {
1136                                 f2fs_err(sbi,
1137                                         "Compress cluster log size is out of range");
1138                                 return -EINVAL;
1139                         }
1140                         F2FS_OPTION(sbi).compress_log_size = arg;
1141                         break;
1142                 case Opt_compress_extension:
1143                         if (!f2fs_sb_has_compression(sbi)) {
1144                                 f2fs_info(sbi, "Image doesn't support compression");
1145                                 break;
1146                         }
1147                         name = match_strdup(&args[0]);
1148                         if (!name)
1149                                 return -ENOMEM;
1150
1151                         ext = F2FS_OPTION(sbi).extensions;
1152                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1153
1154                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1155                                 ext_cnt >= COMPRESS_EXT_NUM) {
1156                                 f2fs_err(sbi,
1157                                         "invalid extension length/number");
1158                                 kfree(name);
1159                                 return -EINVAL;
1160                         }
1161
1162                         if (is_compress_extension_exist(sbi, name, true)) {
1163                                 kfree(name);
1164                                 break;
1165                         }
1166
1167                         ret = strscpy(ext[ext_cnt], name);
1168                         if (ret < 0) {
1169                                 kfree(name);
1170                                 return ret;
1171                         }
1172                         F2FS_OPTION(sbi).compress_ext_cnt++;
1173                         kfree(name);
1174                         break;
1175                 case Opt_nocompress_extension:
1176                         if (!f2fs_sb_has_compression(sbi)) {
1177                                 f2fs_info(sbi, "Image doesn't support compression");
1178                                 break;
1179                         }
1180                         name = match_strdup(&args[0]);
1181                         if (!name)
1182                                 return -ENOMEM;
1183
1184                         noext = F2FS_OPTION(sbi).noextensions;
1185                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1186
1187                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1188                                 noext_cnt >= COMPRESS_EXT_NUM) {
1189                                 f2fs_err(sbi,
1190                                         "invalid extension length/number");
1191                                 kfree(name);
1192                                 return -EINVAL;
1193                         }
1194
1195                         if (is_compress_extension_exist(sbi, name, false)) {
1196                                 kfree(name);
1197                                 break;
1198                         }
1199
1200                         ret = strscpy(noext[noext_cnt], name);
1201                         if (ret < 0) {
1202                                 kfree(name);
1203                                 return ret;
1204                         }
1205                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1206                         kfree(name);
1207                         break;
1208                 case Opt_compress_chksum:
1209                         if (!f2fs_sb_has_compression(sbi)) {
1210                                 f2fs_info(sbi, "Image doesn't support compression");
1211                                 break;
1212                         }
1213                         F2FS_OPTION(sbi).compress_chksum = true;
1214                         break;
1215                 case Opt_compress_mode:
1216                         if (!f2fs_sb_has_compression(sbi)) {
1217                                 f2fs_info(sbi, "Image doesn't support compression");
1218                                 break;
1219                         }
1220                         name = match_strdup(&args[0]);
1221                         if (!name)
1222                                 return -ENOMEM;
1223                         if (!strcmp(name, "fs")) {
1224                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1225                         } else if (!strcmp(name, "user")) {
1226                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1227                         } else {
1228                                 kfree(name);
1229                                 return -EINVAL;
1230                         }
1231                         kfree(name);
1232                         break;
1233                 case Opt_compress_cache:
1234                         if (!f2fs_sb_has_compression(sbi)) {
1235                                 f2fs_info(sbi, "Image doesn't support compression");
1236                                 break;
1237                         }
1238                         set_opt(sbi, COMPRESS_CACHE);
1239                         break;
1240 #else
1241                 case Opt_compress_algorithm:
1242                 case Opt_compress_log_size:
1243                 case Opt_compress_extension:
1244                 case Opt_nocompress_extension:
1245                 case Opt_compress_chksum:
1246                 case Opt_compress_mode:
1247                 case Opt_compress_cache:
1248                         f2fs_info(sbi, "compression options not supported");
1249                         break;
1250 #endif
1251                 case Opt_atgc:
1252                         set_opt(sbi, ATGC);
1253                         break;
1254                 case Opt_gc_merge:
1255                         set_opt(sbi, GC_MERGE);
1256                         break;
1257                 case Opt_nogc_merge:
1258                         clear_opt(sbi, GC_MERGE);
1259                         break;
1260                 case Opt_discard_unit:
1261                         name = match_strdup(&args[0]);
1262                         if (!name)
1263                                 return -ENOMEM;
1264                         if (!strcmp(name, "block")) {
1265                                 F2FS_OPTION(sbi).discard_unit =
1266                                                 DISCARD_UNIT_BLOCK;
1267                         } else if (!strcmp(name, "segment")) {
1268                                 F2FS_OPTION(sbi).discard_unit =
1269                                                 DISCARD_UNIT_SEGMENT;
1270                         } else if (!strcmp(name, "section")) {
1271                                 F2FS_OPTION(sbi).discard_unit =
1272                                                 DISCARD_UNIT_SECTION;
1273                         } else {
1274                                 kfree(name);
1275                                 return -EINVAL;
1276                         }
1277                         kfree(name);
1278                         break;
1279                 case Opt_memory_mode:
1280                         name = match_strdup(&args[0]);
1281                         if (!name)
1282                                 return -ENOMEM;
1283                         if (!strcmp(name, "normal")) {
1284                                 F2FS_OPTION(sbi).memory_mode =
1285                                                 MEMORY_MODE_NORMAL;
1286                         } else if (!strcmp(name, "low")) {
1287                                 F2FS_OPTION(sbi).memory_mode =
1288                                                 MEMORY_MODE_LOW;
1289                         } else {
1290                                 kfree(name);
1291                                 return -EINVAL;
1292                         }
1293                         kfree(name);
1294                         break;
1295                 case Opt_age_extent_cache:
1296                         set_opt(sbi, AGE_EXTENT_CACHE);
1297                         break;
1298                 case Opt_errors:
1299                         name = match_strdup(&args[0]);
1300                         if (!name)
1301                                 return -ENOMEM;
1302                         if (!strcmp(name, "remount-ro")) {
1303                                 F2FS_OPTION(sbi).errors =
1304                                                 MOUNT_ERRORS_READONLY;
1305                         } else if (!strcmp(name, "continue")) {
1306                                 F2FS_OPTION(sbi).errors =
1307                                                 MOUNT_ERRORS_CONTINUE;
1308                         } else if (!strcmp(name, "panic")) {
1309                                 F2FS_OPTION(sbi).errors =
1310                                                 MOUNT_ERRORS_PANIC;
1311                         } else {
1312                                 kfree(name);
1313                                 return -EINVAL;
1314                         }
1315                         kfree(name);
1316                         break;
1317                 case Opt_nat_bits:
1318                         set_opt(sbi, NAT_BITS);
1319                         break;
1320                 default:
1321                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1322                                  p);
1323                         return -EINVAL;
1324                 }
1325         }
1326         return 0;
1327 }
1328
1329 static int f2fs_default_check(struct f2fs_sb_info *sbi)
1330 {
1331 #ifdef CONFIG_QUOTA
1332         if (f2fs_check_quota_options(sbi))
1333                 return -EINVAL;
1334 #else
1335         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1336                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1337                 return -EINVAL;
1338         }
1339         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1340                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1341                 return -EINVAL;
1342         }
1343 #endif
1344
1345         if (!IS_ENABLED(CONFIG_UNICODE) && f2fs_sb_has_casefold(sbi)) {
1346                 f2fs_err(sbi,
1347                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1348                 return -EINVAL;
1349         }
1350
1351         /*
1352          * The BLKZONED feature indicates that the drive was formatted with
1353          * zone alignment optimization. This is optional for host-aware
1354          * devices, but mandatory for host-managed zoned block devices.
1355          */
1356         if (f2fs_sb_has_blkzoned(sbi)) {
1357 #ifdef CONFIG_BLK_DEV_ZONED
1358                 if (F2FS_OPTION(sbi).discard_unit !=
1359                                                 DISCARD_UNIT_SECTION) {
1360                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1361                         F2FS_OPTION(sbi).discard_unit =
1362                                         DISCARD_UNIT_SECTION;
1363                 }
1364
1365                 if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) {
1366                         f2fs_info(sbi, "Only lfs mode is allowed with zoned block device feature");
1367                         return -EINVAL;
1368                 }
1369 #else
1370                 f2fs_err(sbi, "Zoned block device support is not enabled");
1371                 return -EINVAL;
1372 #endif
1373         }
1374
1375 #ifdef CONFIG_F2FS_FS_COMPRESSION
1376         if (f2fs_test_compress_extension(sbi)) {
1377                 f2fs_err(sbi, "invalid compress or nocompress extension");
1378                 return -EINVAL;
1379         }
1380 #endif
1381
1382         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1383                 int min_size, max_size;
1384
1385                 if (!f2fs_sb_has_extra_attr(sbi) ||
1386                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1387                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1388                         return -EINVAL;
1389                 }
1390                 if (!test_opt(sbi, INLINE_XATTR)) {
1391                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1392                         return -EINVAL;
1393                 }
1394
1395                 min_size = MIN_INLINE_XATTR_SIZE;
1396                 max_size = MAX_INLINE_XATTR_SIZE;
1397
1398                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1399                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1400                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1401                                  min_size, max_size);
1402                         return -EINVAL;
1403                 }
1404         }
1405
1406         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1407                 f2fs_err(sbi, "LFS is not compatible with ATGC");
1408                 return -EINVAL;
1409         }
1410
1411         if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1412                 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1413                 return -EINVAL;
1414         }
1415
1416         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1417                 f2fs_err(sbi, "Allow to mount readonly mode only");
1418                 return -EROFS;
1419         }
1420
1421         if (test_opt(sbi, NORECOVERY) && !f2fs_readonly(sbi->sb)) {
1422                 f2fs_err(sbi, "norecovery requires readonly mount");
1423                 return -EINVAL;
1424         }
1425
1426         return 0;
1427 }
1428
1429 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1430 {
1431         struct f2fs_inode_info *fi;
1432
1433         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC))
1434                 return NULL;
1435
1436         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1437         if (!fi)
1438                 return NULL;
1439
1440         init_once((void *) fi);
1441
1442         /* Initialize f2fs-specific inode info */
1443         atomic_set(&fi->dirty_pages, 0);
1444         atomic_set(&fi->i_compr_blocks, 0);
1445         init_f2fs_rwsem(&fi->i_sem);
1446         spin_lock_init(&fi->i_size_lock);
1447         INIT_LIST_HEAD(&fi->dirty_list);
1448         INIT_LIST_HEAD(&fi->gdirty_list);
1449         INIT_LIST_HEAD(&fi->gdonate_list);
1450         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1451         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1452         init_f2fs_rwsem(&fi->i_xattr_sem);
1453
1454         /* Will be used by directory only */
1455         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1456
1457         return &fi->vfs_inode;
1458 }
1459
1460 static int f2fs_drop_inode(struct inode *inode)
1461 {
1462         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1463         int ret;
1464
1465         /*
1466          * during filesystem shutdown, if checkpoint is disabled,
1467          * drop useless meta/node dirty pages.
1468          */
1469         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1470                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1471                         inode->i_ino == F2FS_META_INO(sbi)) {
1472                         trace_f2fs_drop_inode(inode, 1);
1473                         return 1;
1474                 }
1475         }
1476
1477         /*
1478          * This is to avoid a deadlock condition like below.
1479          * writeback_single_inode(inode)
1480          *  - f2fs_write_data_page
1481          *    - f2fs_gc -> iput -> evict
1482          *       - inode_wait_for_writeback(inode)
1483          */
1484         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1485                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1486                         /* to avoid evict_inode call simultaneously */
1487                         atomic_inc(&inode->i_count);
1488                         spin_unlock(&inode->i_lock);
1489
1490                         /* should remain fi->extent_tree for writepage */
1491                         f2fs_destroy_extent_node(inode);
1492
1493                         sb_start_intwrite(inode->i_sb);
1494                         f2fs_i_size_write(inode, 0);
1495
1496                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1497                                         inode, NULL, 0, DATA);
1498                         truncate_inode_pages_final(inode->i_mapping);
1499
1500                         if (F2FS_HAS_BLOCKS(inode))
1501                                 f2fs_truncate(inode);
1502
1503                         sb_end_intwrite(inode->i_sb);
1504
1505                         spin_lock(&inode->i_lock);
1506                         atomic_dec(&inode->i_count);
1507                 }
1508                 trace_f2fs_drop_inode(inode, 0);
1509                 return 0;
1510         }
1511         ret = generic_drop_inode(inode);
1512         if (!ret)
1513                 ret = fscrypt_drop_inode(inode);
1514         trace_f2fs_drop_inode(inode, ret);
1515         return ret;
1516 }
1517
1518 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1519 {
1520         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1521         int ret = 0;
1522
1523         spin_lock(&sbi->inode_lock[DIRTY_META]);
1524         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1525                 ret = 1;
1526         } else {
1527                 set_inode_flag(inode, FI_DIRTY_INODE);
1528                 stat_inc_dirty_inode(sbi, DIRTY_META);
1529         }
1530         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1531                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1532                                 &sbi->inode_list[DIRTY_META]);
1533                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1534         }
1535         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1536
1537         /* if atomic write is not committed, set inode w/ atomic dirty */
1538         if (!ret && f2fs_is_atomic_file(inode) &&
1539                         !is_inode_flag_set(inode, FI_ATOMIC_COMMITTED))
1540                 set_inode_flag(inode, FI_ATOMIC_DIRTIED);
1541
1542         return ret;
1543 }
1544
1545 void f2fs_inode_synced(struct inode *inode)
1546 {
1547         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1548
1549         spin_lock(&sbi->inode_lock[DIRTY_META]);
1550         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1551                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1552                 return;
1553         }
1554         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1555                 list_del_init(&F2FS_I(inode)->gdirty_list);
1556                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1557         }
1558         clear_inode_flag(inode, FI_DIRTY_INODE);
1559         clear_inode_flag(inode, FI_AUTO_RECOVER);
1560         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1561         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1562 }
1563
1564 /*
1565  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1566  *
1567  * We should call set_dirty_inode to write the dirty inode through write_inode.
1568  */
1569 static void f2fs_dirty_inode(struct inode *inode, int flags)
1570 {
1571         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1572
1573         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1574                         inode->i_ino == F2FS_META_INO(sbi))
1575                 return;
1576
1577         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1578                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1579
1580         f2fs_inode_dirtied(inode, false);
1581 }
1582
1583 static void f2fs_free_inode(struct inode *inode)
1584 {
1585         fscrypt_free_inode(inode);
1586         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1587 }
1588
1589 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1590 {
1591         percpu_counter_destroy(&sbi->total_valid_inode_count);
1592         percpu_counter_destroy(&sbi->rf_node_block_count);
1593         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1594 }
1595
1596 static void destroy_device_list(struct f2fs_sb_info *sbi)
1597 {
1598         int i;
1599
1600         for (i = 0; i < sbi->s_ndevs; i++) {
1601                 if (i > 0)
1602                         bdev_fput(FDEV(i).bdev_file);
1603 #ifdef CONFIG_BLK_DEV_ZONED
1604                 kvfree(FDEV(i).blkz_seq);
1605 #endif
1606         }
1607         kvfree(sbi->devs);
1608 }
1609
1610 static void f2fs_put_super(struct super_block *sb)
1611 {
1612         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1613         int i;
1614         int err = 0;
1615         bool done;
1616
1617         /* unregister procfs/sysfs entries in advance to avoid race case */
1618         f2fs_unregister_sysfs(sbi);
1619
1620         f2fs_quota_off_umount(sb);
1621
1622         /* prevent remaining shrinker jobs */
1623         mutex_lock(&sbi->umount_mutex);
1624
1625         /*
1626          * flush all issued checkpoints and stop checkpoint issue thread.
1627          * after then, all checkpoints should be done by each process context.
1628          */
1629         f2fs_stop_ckpt_thread(sbi);
1630
1631         /*
1632          * We don't need to do checkpoint when superblock is clean.
1633          * But, the previous checkpoint was not done by umount, it needs to do
1634          * clean checkpoint again.
1635          */
1636         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1637                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1638                 struct cp_control cpc = {
1639                         .reason = CP_UMOUNT,
1640                 };
1641                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1642                 err = f2fs_write_checkpoint(sbi, &cpc);
1643         }
1644
1645         /* be sure to wait for any on-going discard commands */
1646         done = f2fs_issue_discard_timeout(sbi);
1647         if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && done) {
1648                 struct cp_control cpc = {
1649                         .reason = CP_UMOUNT | CP_TRIMMED,
1650                 };
1651                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1652                 err = f2fs_write_checkpoint(sbi, &cpc);
1653         }
1654
1655         /*
1656          * normally superblock is clean, so we need to release this.
1657          * In addition, EIO will skip do checkpoint, we need this as well.
1658          */
1659         f2fs_release_ino_entry(sbi, true);
1660
1661         f2fs_leave_shrinker(sbi);
1662         mutex_unlock(&sbi->umount_mutex);
1663
1664         /* our cp_error case, we can wait for any writeback page */
1665         f2fs_flush_merged_writes(sbi);
1666
1667         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1668
1669         if (err || f2fs_cp_error(sbi)) {
1670                 truncate_inode_pages_final(NODE_MAPPING(sbi));
1671                 truncate_inode_pages_final(META_MAPPING(sbi));
1672         }
1673
1674         for (i = 0; i < NR_COUNT_TYPE; i++) {
1675                 if (!get_pages(sbi, i))
1676                         continue;
1677                 f2fs_err(sbi, "detect filesystem reference count leak during "
1678                         "umount, type: %d, count: %lld", i, get_pages(sbi, i));
1679                 f2fs_bug_on(sbi, 1);
1680         }
1681
1682         f2fs_bug_on(sbi, sbi->fsync_node_num);
1683
1684         f2fs_destroy_compress_inode(sbi);
1685
1686         iput(sbi->node_inode);
1687         sbi->node_inode = NULL;
1688
1689         iput(sbi->meta_inode);
1690         sbi->meta_inode = NULL;
1691
1692         /*
1693          * iput() can update stat information, if f2fs_write_checkpoint()
1694          * above failed with error.
1695          */
1696         f2fs_destroy_stats(sbi);
1697
1698         /* destroy f2fs internal modules */
1699         f2fs_destroy_node_manager(sbi);
1700         f2fs_destroy_segment_manager(sbi);
1701
1702         /* flush s_error_work before sbi destroy */
1703         flush_work(&sbi->s_error_work);
1704
1705         f2fs_destroy_post_read_wq(sbi);
1706
1707         kvfree(sbi->ckpt);
1708
1709         kfree(sbi->raw_super);
1710
1711         f2fs_destroy_page_array_cache(sbi);
1712         f2fs_destroy_xattr_caches(sbi);
1713 #ifdef CONFIG_QUOTA
1714         for (i = 0; i < MAXQUOTAS; i++)
1715                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1716 #endif
1717         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1718         destroy_percpu_info(sbi);
1719         f2fs_destroy_iostat(sbi);
1720         for (i = 0; i < NR_PAGE_TYPE; i++)
1721                 kvfree(sbi->write_io[i]);
1722 #if IS_ENABLED(CONFIG_UNICODE)
1723         utf8_unload(sb->s_encoding);
1724 #endif
1725 }
1726
1727 int f2fs_sync_fs(struct super_block *sb, int sync)
1728 {
1729         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1730         int err = 0;
1731
1732         if (unlikely(f2fs_cp_error(sbi)))
1733                 return 0;
1734         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1735                 return 0;
1736
1737         trace_f2fs_sync_fs(sb, sync);
1738
1739         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1740                 return -EAGAIN;
1741
1742         if (sync) {
1743                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1744                 err = f2fs_issue_checkpoint(sbi);
1745         }
1746
1747         return err;
1748 }
1749
1750 static int f2fs_freeze(struct super_block *sb)
1751 {
1752         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1753
1754         if (f2fs_readonly(sb))
1755                 return 0;
1756
1757         /* IO error happened before */
1758         if (unlikely(f2fs_cp_error(sbi)))
1759                 return -EIO;
1760
1761         /* must be clean, since sync_filesystem() was already called */
1762         if (is_sbi_flag_set(sbi, SBI_IS_DIRTY))
1763                 return -EINVAL;
1764
1765         sbi->umount_lock_holder = current;
1766
1767         /* Let's flush checkpoints and stop the thread. */
1768         f2fs_flush_ckpt_thread(sbi);
1769
1770         sbi->umount_lock_holder = NULL;
1771
1772         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1773         set_sbi_flag(sbi, SBI_IS_FREEZING);
1774         return 0;
1775 }
1776
1777 static int f2fs_unfreeze(struct super_block *sb)
1778 {
1779         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1780
1781         /*
1782          * It will update discard_max_bytes of mounted lvm device to zero
1783          * after creating snapshot on this lvm device, let's drop all
1784          * remained discards.
1785          * We don't need to disable real-time discard because discard_max_bytes
1786          * will recover after removal of snapshot.
1787          */
1788         if (test_opt(sbi, DISCARD) && !f2fs_hw_support_discard(sbi))
1789                 f2fs_issue_discard_timeout(sbi);
1790
1791         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1792         return 0;
1793 }
1794
1795 #ifdef CONFIG_QUOTA
1796 static int f2fs_statfs_project(struct super_block *sb,
1797                                 kprojid_t projid, struct kstatfs *buf)
1798 {
1799         struct kqid qid;
1800         struct dquot *dquot;
1801         u64 limit;
1802         u64 curblock;
1803
1804         qid = make_kqid_projid(projid);
1805         dquot = dqget(sb, qid);
1806         if (IS_ERR(dquot))
1807                 return PTR_ERR(dquot);
1808         spin_lock(&dquot->dq_dqb_lock);
1809
1810         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1811                                         dquot->dq_dqb.dqb_bhardlimit);
1812         limit >>= sb->s_blocksize_bits;
1813
1814         if (limit) {
1815                 uint64_t remaining = 0;
1816
1817                 curblock = (dquot->dq_dqb.dqb_curspace +
1818                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1819                 if (limit > curblock)
1820                         remaining = limit - curblock;
1821
1822                 buf->f_blocks = min(buf->f_blocks, limit);
1823                 buf->f_bfree = min(buf->f_bfree, remaining);
1824                 buf->f_bavail = min(buf->f_bavail, remaining);
1825         }
1826
1827         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1828                                         dquot->dq_dqb.dqb_ihardlimit);
1829
1830         if (limit) {
1831                 uint64_t remaining = 0;
1832
1833                 if (limit > dquot->dq_dqb.dqb_curinodes)
1834                         remaining = limit - dquot->dq_dqb.dqb_curinodes;
1835
1836                 buf->f_files = min(buf->f_files, limit);
1837                 buf->f_ffree = min(buf->f_ffree, remaining);
1838         }
1839
1840         spin_unlock(&dquot->dq_dqb_lock);
1841         dqput(dquot);
1842         return 0;
1843 }
1844 #endif
1845
1846 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1847 {
1848         struct super_block *sb = dentry->d_sb;
1849         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1850         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1851         block_t total_count, user_block_count, start_count;
1852         u64 avail_node_count;
1853         unsigned int total_valid_node_count;
1854
1855         total_count = le64_to_cpu(sbi->raw_super->block_count);
1856         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1857         buf->f_type = F2FS_SUPER_MAGIC;
1858         buf->f_bsize = sbi->blocksize;
1859
1860         buf->f_blocks = total_count - start_count;
1861
1862         spin_lock(&sbi->stat_lock);
1863         if (sbi->carve_out)
1864                 buf->f_blocks -= sbi->current_reserved_blocks;
1865         user_block_count = sbi->user_block_count;
1866         total_valid_node_count = valid_node_count(sbi);
1867         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1868         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1869                                                 sbi->current_reserved_blocks;
1870
1871         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1872                 buf->f_bfree = 0;
1873         else
1874                 buf->f_bfree -= sbi->unusable_block_count;
1875         spin_unlock(&sbi->stat_lock);
1876
1877         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1878                 buf->f_bavail = buf->f_bfree -
1879                                 F2FS_OPTION(sbi).root_reserved_blocks;
1880         else
1881                 buf->f_bavail = 0;
1882
1883         if (avail_node_count > user_block_count) {
1884                 buf->f_files = user_block_count;
1885                 buf->f_ffree = buf->f_bavail;
1886         } else {
1887                 buf->f_files = avail_node_count;
1888                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1889                                         buf->f_bavail);
1890         }
1891
1892         buf->f_namelen = F2FS_NAME_LEN;
1893         buf->f_fsid    = u64_to_fsid(id);
1894
1895 #ifdef CONFIG_QUOTA
1896         if (is_inode_flag_set(d_inode(dentry), FI_PROJ_INHERIT) &&
1897                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1898                 f2fs_statfs_project(sb, F2FS_I(d_inode(dentry))->i_projid, buf);
1899         }
1900 #endif
1901         return 0;
1902 }
1903
1904 static inline void f2fs_show_quota_options(struct seq_file *seq,
1905                                            struct super_block *sb)
1906 {
1907 #ifdef CONFIG_QUOTA
1908         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1909
1910         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1911                 char *fmtname = "";
1912
1913                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1914                 case QFMT_VFS_OLD:
1915                         fmtname = "vfsold";
1916                         break;
1917                 case QFMT_VFS_V0:
1918                         fmtname = "vfsv0";
1919                         break;
1920                 case QFMT_VFS_V1:
1921                         fmtname = "vfsv1";
1922                         break;
1923                 }
1924                 seq_printf(seq, ",jqfmt=%s", fmtname);
1925         }
1926
1927         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1928                 seq_show_option(seq, "usrjquota",
1929                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1930
1931         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1932                 seq_show_option(seq, "grpjquota",
1933                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1934
1935         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1936                 seq_show_option(seq, "prjjquota",
1937                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1938 #endif
1939 }
1940
1941 #ifdef CONFIG_F2FS_FS_COMPRESSION
1942 static inline void f2fs_show_compress_options(struct seq_file *seq,
1943                                                         struct super_block *sb)
1944 {
1945         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1946         char *algtype = "";
1947         int i;
1948
1949         if (!f2fs_sb_has_compression(sbi))
1950                 return;
1951
1952         switch (F2FS_OPTION(sbi).compress_algorithm) {
1953         case COMPRESS_LZO:
1954                 algtype = "lzo";
1955                 break;
1956         case COMPRESS_LZ4:
1957                 algtype = "lz4";
1958                 break;
1959         case COMPRESS_ZSTD:
1960                 algtype = "zstd";
1961                 break;
1962         case COMPRESS_LZORLE:
1963                 algtype = "lzo-rle";
1964                 break;
1965         }
1966         seq_printf(seq, ",compress_algorithm=%s", algtype);
1967
1968         if (F2FS_OPTION(sbi).compress_level)
1969                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1970
1971         seq_printf(seq, ",compress_log_size=%u",
1972                         F2FS_OPTION(sbi).compress_log_size);
1973
1974         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1975                 seq_printf(seq, ",compress_extension=%s",
1976                         F2FS_OPTION(sbi).extensions[i]);
1977         }
1978
1979         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1980                 seq_printf(seq, ",nocompress_extension=%s",
1981                         F2FS_OPTION(sbi).noextensions[i]);
1982         }
1983
1984         if (F2FS_OPTION(sbi).compress_chksum)
1985                 seq_puts(seq, ",compress_chksum");
1986
1987         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1988                 seq_printf(seq, ",compress_mode=%s", "fs");
1989         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1990                 seq_printf(seq, ",compress_mode=%s", "user");
1991
1992         if (test_opt(sbi, COMPRESS_CACHE))
1993                 seq_puts(seq, ",compress_cache");
1994 }
1995 #endif
1996
1997 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1998 {
1999         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
2000
2001         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
2002                 seq_printf(seq, ",background_gc=%s", "sync");
2003         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
2004                 seq_printf(seq, ",background_gc=%s", "on");
2005         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
2006                 seq_printf(seq, ",background_gc=%s", "off");
2007
2008         if (test_opt(sbi, GC_MERGE))
2009                 seq_puts(seq, ",gc_merge");
2010         else
2011                 seq_puts(seq, ",nogc_merge");
2012
2013         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2014                 seq_puts(seq, ",disable_roll_forward");
2015         if (test_opt(sbi, NORECOVERY))
2016                 seq_puts(seq, ",norecovery");
2017         if (test_opt(sbi, DISCARD)) {
2018                 seq_puts(seq, ",discard");
2019                 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2020                         seq_printf(seq, ",discard_unit=%s", "block");
2021                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2022                         seq_printf(seq, ",discard_unit=%s", "segment");
2023                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2024                         seq_printf(seq, ",discard_unit=%s", "section");
2025         } else {
2026                 seq_puts(seq, ",nodiscard");
2027         }
2028 #ifdef CONFIG_F2FS_FS_XATTR
2029         if (test_opt(sbi, XATTR_USER))
2030                 seq_puts(seq, ",user_xattr");
2031         else
2032                 seq_puts(seq, ",nouser_xattr");
2033         if (test_opt(sbi, INLINE_XATTR))
2034                 seq_puts(seq, ",inline_xattr");
2035         else
2036                 seq_puts(seq, ",noinline_xattr");
2037         if (test_opt(sbi, INLINE_XATTR_SIZE))
2038                 seq_printf(seq, ",inline_xattr_size=%u",
2039                                         F2FS_OPTION(sbi).inline_xattr_size);
2040 #endif
2041 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2042         if (test_opt(sbi, POSIX_ACL))
2043                 seq_puts(seq, ",acl");
2044         else
2045                 seq_puts(seq, ",noacl");
2046 #endif
2047         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
2048                 seq_puts(seq, ",disable_ext_identify");
2049         if (test_opt(sbi, INLINE_DATA))
2050                 seq_puts(seq, ",inline_data");
2051         else
2052                 seq_puts(seq, ",noinline_data");
2053         if (test_opt(sbi, INLINE_DENTRY))
2054                 seq_puts(seq, ",inline_dentry");
2055         else
2056                 seq_puts(seq, ",noinline_dentry");
2057         if (test_opt(sbi, FLUSH_MERGE))
2058                 seq_puts(seq, ",flush_merge");
2059         else
2060                 seq_puts(seq, ",noflush_merge");
2061         if (test_opt(sbi, NOBARRIER))
2062                 seq_puts(seq, ",nobarrier");
2063         else
2064                 seq_puts(seq, ",barrier");
2065         if (test_opt(sbi, FASTBOOT))
2066                 seq_puts(seq, ",fastboot");
2067         if (test_opt(sbi, READ_EXTENT_CACHE))
2068                 seq_puts(seq, ",extent_cache");
2069         else
2070                 seq_puts(seq, ",noextent_cache");
2071         if (test_opt(sbi, AGE_EXTENT_CACHE))
2072                 seq_puts(seq, ",age_extent_cache");
2073         if (test_opt(sbi, DATA_FLUSH))
2074                 seq_puts(seq, ",data_flush");
2075
2076         seq_puts(seq, ",mode=");
2077         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
2078                 seq_puts(seq, "adaptive");
2079         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
2080                 seq_puts(seq, "lfs");
2081         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
2082                 seq_puts(seq, "fragment:segment");
2083         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2084                 seq_puts(seq, "fragment:block");
2085         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
2086         if (test_opt(sbi, RESERVE_ROOT))
2087                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
2088                                 F2FS_OPTION(sbi).root_reserved_blocks,
2089                                 from_kuid_munged(&init_user_ns,
2090                                         F2FS_OPTION(sbi).s_resuid),
2091                                 from_kgid_munged(&init_user_ns,
2092                                         F2FS_OPTION(sbi).s_resgid));
2093 #ifdef CONFIG_F2FS_FAULT_INJECTION
2094         if (test_opt(sbi, FAULT_INJECTION)) {
2095                 seq_printf(seq, ",fault_injection=%u",
2096                                 F2FS_OPTION(sbi).fault_info.inject_rate);
2097                 seq_printf(seq, ",fault_type=%u",
2098                                 F2FS_OPTION(sbi).fault_info.inject_type);
2099         }
2100 #endif
2101 #ifdef CONFIG_QUOTA
2102         if (test_opt(sbi, QUOTA))
2103                 seq_puts(seq, ",quota");
2104         if (test_opt(sbi, USRQUOTA))
2105                 seq_puts(seq, ",usrquota");
2106         if (test_opt(sbi, GRPQUOTA))
2107                 seq_puts(seq, ",grpquota");
2108         if (test_opt(sbi, PRJQUOTA))
2109                 seq_puts(seq, ",prjquota");
2110 #endif
2111         f2fs_show_quota_options(seq, sbi->sb);
2112
2113         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2114
2115         if (sbi->sb->s_flags & SB_INLINECRYPT)
2116                 seq_puts(seq, ",inlinecrypt");
2117
2118         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2119                 seq_printf(seq, ",alloc_mode=%s", "default");
2120         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2121                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2122
2123         if (test_opt(sbi, DISABLE_CHECKPOINT))
2124                 seq_printf(seq, ",checkpoint=disable:%u",
2125                                 F2FS_OPTION(sbi).unusable_cap);
2126         if (test_opt(sbi, MERGE_CHECKPOINT))
2127                 seq_puts(seq, ",checkpoint_merge");
2128         else
2129                 seq_puts(seq, ",nocheckpoint_merge");
2130         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2131                 seq_printf(seq, ",fsync_mode=%s", "posix");
2132         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2133                 seq_printf(seq, ",fsync_mode=%s", "strict");
2134         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2135                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2136
2137 #ifdef CONFIG_F2FS_FS_COMPRESSION
2138         f2fs_show_compress_options(seq, sbi->sb);
2139 #endif
2140
2141         if (test_opt(sbi, ATGC))
2142                 seq_puts(seq, ",atgc");
2143
2144         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2145                 seq_printf(seq, ",memory=%s", "normal");
2146         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2147                 seq_printf(seq, ",memory=%s", "low");
2148
2149         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
2150                 seq_printf(seq, ",errors=%s", "remount-ro");
2151         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
2152                 seq_printf(seq, ",errors=%s", "continue");
2153         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
2154                 seq_printf(seq, ",errors=%s", "panic");
2155
2156         if (test_opt(sbi, NAT_BITS))
2157                 seq_puts(seq, ",nat_bits");
2158
2159         return 0;
2160 }
2161
2162 static void default_options(struct f2fs_sb_info *sbi, bool remount)
2163 {
2164         /* init some FS parameters */
2165         if (!remount) {
2166                 set_opt(sbi, READ_EXTENT_CACHE);
2167                 clear_opt(sbi, DISABLE_CHECKPOINT);
2168
2169                 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2170                         set_opt(sbi, DISCARD);
2171
2172                 if (f2fs_sb_has_blkzoned(sbi))
2173                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2174                 else
2175                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2176         }
2177
2178         if (f2fs_sb_has_readonly(sbi))
2179                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2180         else
2181                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2182
2183         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2184         if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2185                                                         SMALL_VOLUME_SEGMENTS)
2186                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2187         else
2188                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2189         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2190         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2191         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2192         if (f2fs_sb_has_compression(sbi)) {
2193                 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2194                 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2195                 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2196                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2197         }
2198         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2199         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2200         F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
2201
2202         set_opt(sbi, INLINE_XATTR);
2203         set_opt(sbi, INLINE_DATA);
2204         set_opt(sbi, INLINE_DENTRY);
2205         set_opt(sbi, MERGE_CHECKPOINT);
2206         set_opt(sbi, LAZYTIME);
2207         F2FS_OPTION(sbi).unusable_cap = 0;
2208         if (!f2fs_is_readonly(sbi))
2209                 set_opt(sbi, FLUSH_MERGE);
2210         if (f2fs_sb_has_blkzoned(sbi))
2211                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2212         else
2213                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2214
2215 #ifdef CONFIG_F2FS_FS_XATTR
2216         set_opt(sbi, XATTR_USER);
2217 #endif
2218 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2219         set_opt(sbi, POSIX_ACL);
2220 #endif
2221
2222         f2fs_build_fault_attr(sbi, 0, 0, FAULT_ALL);
2223 }
2224
2225 #ifdef CONFIG_QUOTA
2226 static int f2fs_enable_quotas(struct super_block *sb);
2227 #endif
2228
2229 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2230 {
2231         unsigned int s_flags = sbi->sb->s_flags;
2232         struct cp_control cpc;
2233         unsigned int gc_mode = sbi->gc_mode;
2234         int err = 0;
2235         int ret;
2236         block_t unusable;
2237
2238         if (s_flags & SB_RDONLY) {
2239                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2240                 return -EINVAL;
2241         }
2242         sbi->sb->s_flags |= SB_ACTIVE;
2243
2244         /* check if we need more GC first */
2245         unusable = f2fs_get_unusable_blocks(sbi);
2246         if (!f2fs_disable_cp_again(sbi, unusable))
2247                 goto skip_gc;
2248
2249         f2fs_update_time(sbi, DISABLE_TIME);
2250
2251         sbi->gc_mode = GC_URGENT_HIGH;
2252
2253         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2254                 struct f2fs_gc_control gc_control = {
2255                         .victim_segno = NULL_SEGNO,
2256                         .init_gc_type = FG_GC,
2257                         .should_migrate_blocks = false,
2258                         .err_gc_skipped = true,
2259                         .no_bg_gc = true,
2260                         .nr_free_secs = 1 };
2261
2262                 f2fs_down_write(&sbi->gc_lock);
2263                 stat_inc_gc_call_count(sbi, FOREGROUND);
2264                 err = f2fs_gc(sbi, &gc_control);
2265                 if (err == -ENODATA) {
2266                         err = 0;
2267                         break;
2268                 }
2269                 if (err && err != -EAGAIN)
2270                         break;
2271         }
2272
2273         ret = sync_filesystem(sbi->sb);
2274         if (ret || err) {
2275                 err = ret ? ret : err;
2276                 goto restore_flag;
2277         }
2278
2279         unusable = f2fs_get_unusable_blocks(sbi);
2280         if (f2fs_disable_cp_again(sbi, unusable)) {
2281                 err = -EAGAIN;
2282                 goto restore_flag;
2283         }
2284
2285 skip_gc:
2286         f2fs_down_write(&sbi->gc_lock);
2287         cpc.reason = CP_PAUSE;
2288         set_sbi_flag(sbi, SBI_CP_DISABLED);
2289         stat_inc_cp_call_count(sbi, TOTAL_CALL);
2290         err = f2fs_write_checkpoint(sbi, &cpc);
2291         if (err)
2292                 goto out_unlock;
2293
2294         spin_lock(&sbi->stat_lock);
2295         sbi->unusable_block_count = unusable;
2296         spin_unlock(&sbi->stat_lock);
2297
2298 out_unlock:
2299         f2fs_up_write(&sbi->gc_lock);
2300 restore_flag:
2301         sbi->gc_mode = gc_mode;
2302         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2303         return err;
2304 }
2305
2306 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2307 {
2308         int retry = DEFAULT_RETRY_IO_COUNT;
2309
2310         /* we should flush all the data to keep data consistency */
2311         do {
2312                 sync_inodes_sb(sbi->sb);
2313                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2314         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2315
2316         if (unlikely(retry < 0))
2317                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2318
2319         f2fs_down_write(&sbi->gc_lock);
2320         f2fs_dirty_to_prefree(sbi);
2321
2322         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2323         set_sbi_flag(sbi, SBI_IS_DIRTY);
2324         f2fs_up_write(&sbi->gc_lock);
2325
2326         f2fs_sync_fs(sbi->sb, 1);
2327
2328         /* Let's ensure there's no pending checkpoint anymore */
2329         f2fs_flush_ckpt_thread(sbi);
2330 }
2331
2332 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2333 {
2334         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2335         struct f2fs_mount_info org_mount_opt;
2336         unsigned long old_sb_flags;
2337         int err;
2338         bool need_restart_gc = false, need_stop_gc = false;
2339         bool need_restart_flush = false, need_stop_flush = false;
2340         bool need_restart_discard = false, need_stop_discard = false;
2341         bool need_enable_checkpoint = false, need_disable_checkpoint = false;
2342         bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2343         bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2344         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2345         bool no_atgc = !test_opt(sbi, ATGC);
2346         bool no_discard = !test_opt(sbi, DISCARD);
2347         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2348         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2349         bool no_nat_bits = !test_opt(sbi, NAT_BITS);
2350 #ifdef CONFIG_QUOTA
2351         int i, j;
2352 #endif
2353
2354         /*
2355          * Save the old mount options in case we
2356          * need to restore them.
2357          */
2358         org_mount_opt = sbi->mount_opt;
2359         old_sb_flags = sb->s_flags;
2360
2361         sbi->umount_lock_holder = current;
2362
2363 #ifdef CONFIG_QUOTA
2364         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2365         for (i = 0; i < MAXQUOTAS; i++) {
2366                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2367                         org_mount_opt.s_qf_names[i] =
2368                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2369                                 GFP_KERNEL);
2370                         if (!org_mount_opt.s_qf_names[i]) {
2371                                 for (j = 0; j < i; j++)
2372                                         kfree(org_mount_opt.s_qf_names[j]);
2373                                 return -ENOMEM;
2374                         }
2375                 } else {
2376                         org_mount_opt.s_qf_names[i] = NULL;
2377                 }
2378         }
2379 #endif
2380
2381         /* recover superblocks we couldn't write due to previous RO mount */
2382         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2383                 err = f2fs_commit_super(sbi, false);
2384                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2385                           err);
2386                 if (!err)
2387                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2388         }
2389
2390         default_options(sbi, true);
2391
2392         /* parse mount options */
2393         err = parse_options(sbi, data, true);
2394         if (err)
2395                 goto restore_opts;
2396
2397 #ifdef CONFIG_BLK_DEV_ZONED
2398         if (f2fs_sb_has_blkzoned(sbi) &&
2399                 sbi->max_open_zones < F2FS_OPTION(sbi).active_logs) {
2400                 f2fs_err(sbi,
2401                         "zoned: max open zones %u is too small, need at least %u open zones",
2402                                  sbi->max_open_zones, F2FS_OPTION(sbi).active_logs);
2403                 err = -EINVAL;
2404                 goto restore_opts;
2405         }
2406 #endif
2407
2408         err = f2fs_default_check(sbi);
2409         if (err)
2410                 goto restore_opts;
2411
2412         /* flush outstanding errors before changing fs state */
2413         flush_work(&sbi->s_error_work);
2414
2415         /*
2416          * Previous and new state of filesystem is RO,
2417          * so skip checking GC and FLUSH_MERGE conditions.
2418          */
2419         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2420                 goto skip;
2421
2422         if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
2423                 err = -EROFS;
2424                 goto restore_opts;
2425         }
2426
2427 #ifdef CONFIG_QUOTA
2428         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2429                 err = dquot_suspend(sb, -1);
2430                 if (err < 0)
2431                         goto restore_opts;
2432         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2433                 /* dquot_resume needs RW */
2434                 sb->s_flags &= ~SB_RDONLY;
2435                 if (sb_any_quota_suspended(sb)) {
2436                         dquot_resume(sb, -1);
2437                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2438                         err = f2fs_enable_quotas(sb);
2439                         if (err)
2440                                 goto restore_opts;
2441                 }
2442         }
2443 #endif
2444         if (f2fs_lfs_mode(sbi) && !IS_F2FS_IPU_DISABLE(sbi)) {
2445                 err = -EINVAL;
2446                 f2fs_warn(sbi, "LFS is not compatible with IPU");
2447                 goto restore_opts;
2448         }
2449
2450         /* disallow enable atgc dynamically */
2451         if (no_atgc == !!test_opt(sbi, ATGC)) {
2452                 err = -EINVAL;
2453                 f2fs_warn(sbi, "switch atgc option is not allowed");
2454                 goto restore_opts;
2455         }
2456
2457         /* disallow enable/disable extent_cache dynamically */
2458         if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2459                 err = -EINVAL;
2460                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2461                 goto restore_opts;
2462         }
2463         /* disallow enable/disable age extent_cache dynamically */
2464         if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2465                 err = -EINVAL;
2466                 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2467                 goto restore_opts;
2468         }
2469
2470         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2471                 err = -EINVAL;
2472                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2473                 goto restore_opts;
2474         }
2475
2476         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2477                 err = -EINVAL;
2478                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2479                 goto restore_opts;
2480         }
2481
2482         if (no_nat_bits == !!test_opt(sbi, NAT_BITS)) {
2483                 err = -EINVAL;
2484                 f2fs_warn(sbi, "switch nat_bits option is not allowed");
2485                 goto restore_opts;
2486         }
2487
2488         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2489                 err = -EINVAL;
2490                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2491                 goto restore_opts;
2492         }
2493
2494         /*
2495          * We stop the GC thread if FS is mounted as RO
2496          * or if background_gc = off is passed in mount
2497          * option. Also sync the filesystem.
2498          */
2499         if ((*flags & SB_RDONLY) ||
2500                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2501                         !test_opt(sbi, GC_MERGE))) {
2502                 if (sbi->gc_thread) {
2503                         f2fs_stop_gc_thread(sbi);
2504                         need_restart_gc = true;
2505                 }
2506         } else if (!sbi->gc_thread) {
2507                 err = f2fs_start_gc_thread(sbi);
2508                 if (err)
2509                         goto restore_opts;
2510                 need_stop_gc = true;
2511         }
2512
2513         if (*flags & SB_RDONLY) {
2514                 sync_inodes_sb(sb);
2515
2516                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2517                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2518                 f2fs_sync_fs(sb, 1);
2519                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2520         }
2521
2522         /*
2523          * We stop issue flush thread if FS is mounted as RO
2524          * or if flush_merge is not passed in mount option.
2525          */
2526         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2527                 clear_opt(sbi, FLUSH_MERGE);
2528                 f2fs_destroy_flush_cmd_control(sbi, false);
2529                 need_restart_flush = true;
2530         } else {
2531                 err = f2fs_create_flush_cmd_control(sbi);
2532                 if (err)
2533                         goto restore_gc;
2534                 need_stop_flush = true;
2535         }
2536
2537         if (no_discard == !!test_opt(sbi, DISCARD)) {
2538                 if (test_opt(sbi, DISCARD)) {
2539                         err = f2fs_start_discard_thread(sbi);
2540                         if (err)
2541                                 goto restore_flush;
2542                         need_stop_discard = true;
2543                 } else {
2544                         f2fs_stop_discard_thread(sbi);
2545                         f2fs_issue_discard_timeout(sbi);
2546                         need_restart_discard = true;
2547                 }
2548         }
2549
2550         adjust_unusable_cap_perc(sbi);
2551         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2552                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2553                         err = f2fs_disable_checkpoint(sbi);
2554                         if (err)
2555                                 goto restore_discard;
2556                         need_enable_checkpoint = true;
2557                 } else {
2558                         f2fs_enable_checkpoint(sbi);
2559                         need_disable_checkpoint = true;
2560                 }
2561         }
2562
2563         /*
2564          * Place this routine at the end, since a new checkpoint would be
2565          * triggered while remount and we need to take care of it before
2566          * returning from remount.
2567          */
2568         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2569                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2570                 f2fs_stop_ckpt_thread(sbi);
2571         } else {
2572                 /* Flush if the prevous checkpoint, if exists. */
2573                 f2fs_flush_ckpt_thread(sbi);
2574
2575                 err = f2fs_start_ckpt_thread(sbi);
2576                 if (err) {
2577                         f2fs_err(sbi,
2578                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2579                             err);
2580                         goto restore_checkpoint;
2581                 }
2582         }
2583
2584 skip:
2585 #ifdef CONFIG_QUOTA
2586         /* Release old quota file names */
2587         for (i = 0; i < MAXQUOTAS; i++)
2588                 kfree(org_mount_opt.s_qf_names[i]);
2589 #endif
2590         /* Update the POSIXACL Flag */
2591         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2592                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2593
2594         limit_reserve_root(sbi);
2595         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2596
2597         sbi->umount_lock_holder = NULL;
2598         return 0;
2599 restore_checkpoint:
2600         if (need_enable_checkpoint) {
2601                 f2fs_enable_checkpoint(sbi);
2602         } else if (need_disable_checkpoint) {
2603                 if (f2fs_disable_checkpoint(sbi))
2604                         f2fs_warn(sbi, "checkpoint has not been disabled");
2605         }
2606 restore_discard:
2607         if (need_restart_discard) {
2608                 if (f2fs_start_discard_thread(sbi))
2609                         f2fs_warn(sbi, "discard has been stopped");
2610         } else if (need_stop_discard) {
2611                 f2fs_stop_discard_thread(sbi);
2612         }
2613 restore_flush:
2614         if (need_restart_flush) {
2615                 if (f2fs_create_flush_cmd_control(sbi))
2616                         f2fs_warn(sbi, "background flush thread has stopped");
2617         } else if (need_stop_flush) {
2618                 clear_opt(sbi, FLUSH_MERGE);
2619                 f2fs_destroy_flush_cmd_control(sbi, false);
2620         }
2621 restore_gc:
2622         if (need_restart_gc) {
2623                 if (f2fs_start_gc_thread(sbi))
2624                         f2fs_warn(sbi, "background gc thread has stopped");
2625         } else if (need_stop_gc) {
2626                 f2fs_stop_gc_thread(sbi);
2627         }
2628 restore_opts:
2629 #ifdef CONFIG_QUOTA
2630         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2631         for (i = 0; i < MAXQUOTAS; i++) {
2632                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2633                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2634         }
2635 #endif
2636         sbi->mount_opt = org_mount_opt;
2637         sb->s_flags = old_sb_flags;
2638
2639         sbi->umount_lock_holder = NULL;
2640         return err;
2641 }
2642
2643 static void f2fs_shutdown(struct super_block *sb)
2644 {
2645         f2fs_do_shutdown(F2FS_SB(sb), F2FS_GOING_DOWN_NOSYNC, false, false);
2646 }
2647
2648 #ifdef CONFIG_QUOTA
2649 static bool f2fs_need_recovery(struct f2fs_sb_info *sbi)
2650 {
2651         /* need to recovery orphan */
2652         if (is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
2653                 return true;
2654         /* need to recovery data */
2655         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2656                 return false;
2657         if (test_opt(sbi, NORECOVERY))
2658                 return false;
2659         return !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG);
2660 }
2661
2662 static bool f2fs_recover_quota_begin(struct f2fs_sb_info *sbi)
2663 {
2664         bool readonly = f2fs_readonly(sbi->sb);
2665
2666         if (!f2fs_need_recovery(sbi))
2667                 return false;
2668
2669         /* it doesn't need to check f2fs_sb_has_readonly() */
2670         if (f2fs_hw_is_readonly(sbi))
2671                 return false;
2672
2673         if (readonly) {
2674                 sbi->sb->s_flags &= ~SB_RDONLY;
2675                 set_sbi_flag(sbi, SBI_IS_WRITABLE);
2676         }
2677
2678         /*
2679          * Turn on quotas which were not enabled for read-only mounts if
2680          * filesystem has quota feature, so that they are updated correctly.
2681          */
2682         return f2fs_enable_quota_files(sbi, readonly);
2683 }
2684
2685 static void f2fs_recover_quota_end(struct f2fs_sb_info *sbi,
2686                                                 bool quota_enabled)
2687 {
2688         if (quota_enabled)
2689                 f2fs_quota_off_umount(sbi->sb);
2690
2691         if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE)) {
2692                 clear_sbi_flag(sbi, SBI_IS_WRITABLE);
2693                 sbi->sb->s_flags |= SB_RDONLY;
2694         }
2695 }
2696
2697 /* Read data from quotafile */
2698 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2699                                size_t len, loff_t off)
2700 {
2701         struct inode *inode = sb_dqopt(sb)->files[type];
2702         struct address_space *mapping = inode->i_mapping;
2703         int tocopy;
2704         size_t toread;
2705         loff_t i_size = i_size_read(inode);
2706
2707         if (off > i_size)
2708                 return 0;
2709
2710         if (off + len > i_size)
2711                 len = i_size - off;
2712         toread = len;
2713         while (toread > 0) {
2714                 struct folio *folio;
2715                 size_t offset;
2716
2717 repeat:
2718                 folio = mapping_read_folio_gfp(mapping, off >> PAGE_SHIFT,
2719                                 GFP_NOFS);
2720                 if (IS_ERR(folio)) {
2721                         if (PTR_ERR(folio) == -ENOMEM) {
2722                                 memalloc_retry_wait(GFP_NOFS);
2723                                 goto repeat;
2724                         }
2725                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2726                         return PTR_ERR(folio);
2727                 }
2728                 offset = offset_in_folio(folio, off);
2729                 tocopy = min(folio_size(folio) - offset, toread);
2730
2731                 folio_lock(folio);
2732
2733                 if (unlikely(folio->mapping != mapping)) {
2734                         f2fs_folio_put(folio, true);
2735                         goto repeat;
2736                 }
2737
2738                 /*
2739                  * should never happen, just leave f2fs_bug_on() here to catch
2740                  * any potential bug.
2741                  */
2742                 f2fs_bug_on(F2FS_SB(sb), !folio_test_uptodate(folio));
2743
2744                 memcpy_from_folio(data, folio, offset, tocopy);
2745                 f2fs_folio_put(folio, true);
2746
2747                 toread -= tocopy;
2748                 data += tocopy;
2749                 off += tocopy;
2750         }
2751         return len;
2752 }
2753
2754 /* Write to quotafile */
2755 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2756                                 const char *data, size_t len, loff_t off)
2757 {
2758         struct inode *inode = sb_dqopt(sb)->files[type];
2759         struct address_space *mapping = inode->i_mapping;
2760         const struct address_space_operations *a_ops = mapping->a_ops;
2761         int offset = off & (sb->s_blocksize - 1);
2762         size_t towrite = len;
2763         struct folio *folio;
2764         void *fsdata = NULL;
2765         int err = 0;
2766         int tocopy;
2767
2768         while (towrite > 0) {
2769                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2770                                                                 towrite);
2771 retry:
2772                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2773                                                         &folio, &fsdata);
2774                 if (unlikely(err)) {
2775                         if (err == -ENOMEM) {
2776                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2777                                 goto retry;
2778                         }
2779                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2780                         break;
2781                 }
2782
2783                 memcpy_to_folio(folio, offset_in_folio(folio, off), data, tocopy);
2784
2785                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2786                                                 folio, fsdata);
2787                 offset = 0;
2788                 towrite -= tocopy;
2789                 off += tocopy;
2790                 data += tocopy;
2791                 cond_resched();
2792         }
2793
2794         if (len == towrite)
2795                 return err;
2796         inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
2797         f2fs_mark_inode_dirty_sync(inode, false);
2798         return len - towrite;
2799 }
2800
2801 int f2fs_dquot_initialize(struct inode *inode)
2802 {
2803         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT))
2804                 return -ESRCH;
2805
2806         return dquot_initialize(inode);
2807 }
2808
2809 static struct dquot __rcu **f2fs_get_dquots(struct inode *inode)
2810 {
2811         return F2FS_I(inode)->i_dquot;
2812 }
2813
2814 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2815 {
2816         return &F2FS_I(inode)->i_reserved_quota;
2817 }
2818
2819 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2820 {
2821         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2822                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2823                 return 0;
2824         }
2825
2826         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2827                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2828 }
2829
2830 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2831 {
2832         int enabled = 0;
2833         int i, err;
2834
2835         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2836                 err = f2fs_enable_quotas(sbi->sb);
2837                 if (err) {
2838                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2839                         return 0;
2840                 }
2841                 return 1;
2842         }
2843
2844         for (i = 0; i < MAXQUOTAS; i++) {
2845                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2846                         err = f2fs_quota_on_mount(sbi, i);
2847                         if (!err) {
2848                                 enabled = 1;
2849                                 continue;
2850                         }
2851                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2852                                  err, i);
2853                 }
2854         }
2855         return enabled;
2856 }
2857
2858 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2859                              unsigned int flags)
2860 {
2861         struct inode *qf_inode;
2862         unsigned long qf_inum;
2863         unsigned long qf_flag = F2FS_QUOTA_DEFAULT_FL;
2864         int err;
2865
2866         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2867
2868         qf_inum = f2fs_qf_ino(sb, type);
2869         if (!qf_inum)
2870                 return -EPERM;
2871
2872         qf_inode = f2fs_iget(sb, qf_inum);
2873         if (IS_ERR(qf_inode)) {
2874                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2875                 return PTR_ERR(qf_inode);
2876         }
2877
2878         /* Don't account quota for quota files to avoid recursion */
2879         inode_lock(qf_inode);
2880         qf_inode->i_flags |= S_NOQUOTA;
2881
2882         if ((F2FS_I(qf_inode)->i_flags & qf_flag) != qf_flag) {
2883                 F2FS_I(qf_inode)->i_flags |= qf_flag;
2884                 f2fs_set_inode_flags(qf_inode);
2885         }
2886         inode_unlock(qf_inode);
2887
2888         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2889         iput(qf_inode);
2890         return err;
2891 }
2892
2893 static int f2fs_enable_quotas(struct super_block *sb)
2894 {
2895         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2896         int type, err = 0;
2897         unsigned long qf_inum;
2898         bool quota_mopt[MAXQUOTAS] = {
2899                 test_opt(sbi, USRQUOTA),
2900                 test_opt(sbi, GRPQUOTA),
2901                 test_opt(sbi, PRJQUOTA),
2902         };
2903
2904         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2905                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2906                 return 0;
2907         }
2908
2909         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2910
2911         for (type = 0; type < MAXQUOTAS; type++) {
2912                 qf_inum = f2fs_qf_ino(sb, type);
2913                 if (qf_inum) {
2914                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2915                                 DQUOT_USAGE_ENABLED |
2916                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2917                         if (err) {
2918                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2919                                          type, err);
2920                                 for (type--; type >= 0; type--)
2921                                         dquot_quota_off(sb, type);
2922                                 set_sbi_flag(F2FS_SB(sb),
2923                                                 SBI_QUOTA_NEED_REPAIR);
2924                                 return err;
2925                         }
2926                 }
2927         }
2928         return 0;
2929 }
2930
2931 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2932 {
2933         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2934         struct address_space *mapping = dqopt->files[type]->i_mapping;
2935         int ret = 0;
2936
2937         ret = dquot_writeback_dquots(sbi->sb, type);
2938         if (ret)
2939                 goto out;
2940
2941         ret = filemap_fdatawrite(mapping);
2942         if (ret)
2943                 goto out;
2944
2945         /* if we are using journalled quota */
2946         if (is_journalled_quota(sbi))
2947                 goto out;
2948
2949         ret = filemap_fdatawait(mapping);
2950
2951         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2952 out:
2953         if (ret)
2954                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2955         return ret;
2956 }
2957
2958 int f2fs_do_quota_sync(struct super_block *sb, int type)
2959 {
2960         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2961         struct quota_info *dqopt = sb_dqopt(sb);
2962         int cnt;
2963         int ret = 0;
2964
2965         /*
2966          * Now when everything is written we can discard the pagecache so
2967          * that userspace sees the changes.
2968          */
2969         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2970
2971                 if (type != -1 && cnt != type)
2972                         continue;
2973
2974                 if (!sb_has_quota_active(sb, cnt))
2975                         continue;
2976
2977                 if (!f2fs_sb_has_quota_ino(sbi))
2978                         inode_lock(dqopt->files[cnt]);
2979
2980                 /*
2981                  * do_quotactl
2982                  *  f2fs_quota_sync
2983                  *  f2fs_down_read(quota_sem)
2984                  *  dquot_writeback_dquots()
2985                  *  f2fs_dquot_commit
2986                  *                            block_operation
2987                  *                            f2fs_down_read(quota_sem)
2988                  */
2989                 f2fs_lock_op(sbi);
2990                 f2fs_down_read(&sbi->quota_sem);
2991
2992                 ret = f2fs_quota_sync_file(sbi, cnt);
2993
2994                 f2fs_up_read(&sbi->quota_sem);
2995                 f2fs_unlock_op(sbi);
2996
2997                 if (!f2fs_sb_has_quota_ino(sbi))
2998                         inode_unlock(dqopt->files[cnt]);
2999
3000                 if (ret)
3001                         break;
3002         }
3003         return ret;
3004 }
3005
3006 static int f2fs_quota_sync(struct super_block *sb, int type)
3007 {
3008         int ret;
3009
3010         F2FS_SB(sb)->umount_lock_holder = current;
3011         ret = f2fs_do_quota_sync(sb, type);
3012         F2FS_SB(sb)->umount_lock_holder = NULL;
3013         return ret;
3014 }
3015
3016 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
3017                                                         const struct path *path)
3018 {
3019         struct inode *inode;
3020         int err = 0;
3021
3022         /* if quota sysfile exists, deny enabling quota with specific file */
3023         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
3024                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
3025                 return -EBUSY;
3026         }
3027
3028         if (path->dentry->d_sb != sb)
3029                 return -EXDEV;
3030
3031         F2FS_SB(sb)->umount_lock_holder = current;
3032
3033         err = f2fs_do_quota_sync(sb, type);
3034         if (err)
3035                 goto out;
3036
3037         inode = d_inode(path->dentry);
3038
3039         err = filemap_fdatawrite(inode->i_mapping);
3040         if (err)
3041                 goto out;
3042
3043         err = filemap_fdatawait(inode->i_mapping);
3044         if (err)
3045                 goto out;
3046
3047         err = dquot_quota_on(sb, type, format_id, path);
3048         if (err)
3049                 goto out;
3050
3051         inode_lock(inode);
3052         F2FS_I(inode)->i_flags |= F2FS_QUOTA_DEFAULT_FL;
3053         f2fs_set_inode_flags(inode);
3054         inode_unlock(inode);
3055         f2fs_mark_inode_dirty_sync(inode, false);
3056 out:
3057         F2FS_SB(sb)->umount_lock_holder = NULL;
3058         return err;
3059 }
3060
3061 static int __f2fs_quota_off(struct super_block *sb, int type)
3062 {
3063         struct inode *inode = sb_dqopt(sb)->files[type];
3064         int err;
3065
3066         if (!inode || !igrab(inode))
3067                 return dquot_quota_off(sb, type);
3068
3069         err = f2fs_do_quota_sync(sb, type);
3070         if (err)
3071                 goto out_put;
3072
3073         err = dquot_quota_off(sb, type);
3074         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
3075                 goto out_put;
3076
3077         inode_lock(inode);
3078         F2FS_I(inode)->i_flags &= ~F2FS_QUOTA_DEFAULT_FL;
3079         f2fs_set_inode_flags(inode);
3080         inode_unlock(inode);
3081         f2fs_mark_inode_dirty_sync(inode, false);
3082 out_put:
3083         iput(inode);
3084         return err;
3085 }
3086
3087 static int f2fs_quota_off(struct super_block *sb, int type)
3088 {
3089         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3090         int err;
3091
3092         F2FS_SB(sb)->umount_lock_holder = current;
3093
3094         err = __f2fs_quota_off(sb, type);
3095
3096         /*
3097          * quotactl can shutdown journalled quota, result in inconsistence
3098          * between quota record and fs data by following updates, tag the
3099          * flag to let fsck be aware of it.
3100          */
3101         if (is_journalled_quota(sbi))
3102                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3103
3104         F2FS_SB(sb)->umount_lock_holder = NULL;
3105
3106         return err;
3107 }
3108
3109 void f2fs_quota_off_umount(struct super_block *sb)
3110 {
3111         int type;
3112         int err;
3113
3114         for (type = 0; type < MAXQUOTAS; type++) {
3115                 err = __f2fs_quota_off(sb, type);
3116                 if (err) {
3117                         int ret = dquot_quota_off(sb, type);
3118
3119                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
3120                                  type, err, ret);
3121                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
3122                 }
3123         }
3124         /*
3125          * In case of checkpoint=disable, we must flush quota blocks.
3126          * This can cause NULL exception for node_inode in end_io, since
3127          * put_super already dropped it.
3128          */
3129         sync_filesystem(sb);
3130 }
3131
3132 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
3133 {
3134         struct quota_info *dqopt = sb_dqopt(sb);
3135         int type;
3136
3137         for (type = 0; type < MAXQUOTAS; type++) {
3138                 if (!dqopt->files[type])
3139                         continue;
3140                 f2fs_inode_synced(dqopt->files[type]);
3141         }
3142 }
3143
3144 static int f2fs_dquot_commit(struct dquot *dquot)
3145 {
3146         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3147         int ret;
3148
3149         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
3150         ret = dquot_commit(dquot);
3151         if (ret < 0)
3152                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3153         f2fs_up_read(&sbi->quota_sem);
3154         return ret;
3155 }
3156
3157 static int f2fs_dquot_acquire(struct dquot *dquot)
3158 {
3159         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3160         int ret;
3161
3162         f2fs_down_read(&sbi->quota_sem);
3163         ret = dquot_acquire(dquot);
3164         if (ret < 0)
3165                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3166         f2fs_up_read(&sbi->quota_sem);
3167         return ret;
3168 }
3169
3170 static int f2fs_dquot_release(struct dquot *dquot)
3171 {
3172         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3173         int ret = dquot_release(dquot);
3174
3175         if (ret < 0)
3176                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3177         return ret;
3178 }
3179
3180 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
3181 {
3182         struct super_block *sb = dquot->dq_sb;
3183         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3184         int ret = dquot_mark_dquot_dirty(dquot);
3185
3186         /* if we are using journalled quota */
3187         if (is_journalled_quota(sbi))
3188                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
3189
3190         return ret;
3191 }
3192
3193 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
3194 {
3195         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3196         int ret = dquot_commit_info(sb, type);
3197
3198         if (ret < 0)
3199                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3200         return ret;
3201 }
3202
3203 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
3204 {
3205         *projid = F2FS_I(inode)->i_projid;
3206         return 0;
3207 }
3208
3209 static const struct dquot_operations f2fs_quota_operations = {
3210         .get_reserved_space = f2fs_get_reserved_space,
3211         .write_dquot    = f2fs_dquot_commit,
3212         .acquire_dquot  = f2fs_dquot_acquire,
3213         .release_dquot  = f2fs_dquot_release,
3214         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
3215         .write_info     = f2fs_dquot_commit_info,
3216         .alloc_dquot    = dquot_alloc,
3217         .destroy_dquot  = dquot_destroy,
3218         .get_projid     = f2fs_get_projid,
3219         .get_next_id    = dquot_get_next_id,
3220 };
3221
3222 static const struct quotactl_ops f2fs_quotactl_ops = {
3223         .quota_on       = f2fs_quota_on,
3224         .quota_off      = f2fs_quota_off,
3225         .quota_sync     = f2fs_quota_sync,
3226         .get_state      = dquot_get_state,
3227         .set_info       = dquot_set_dqinfo,
3228         .get_dqblk      = dquot_get_dqblk,
3229         .set_dqblk      = dquot_set_dqblk,
3230         .get_nextdqblk  = dquot_get_next_dqblk,
3231 };
3232 #else
3233 int f2fs_dquot_initialize(struct inode *inode)
3234 {
3235         return 0;
3236 }
3237
3238 int f2fs_do_quota_sync(struct super_block *sb, int type)
3239 {
3240         return 0;
3241 }
3242
3243 void f2fs_quota_off_umount(struct super_block *sb)
3244 {
3245 }
3246 #endif
3247
3248 static const struct super_operations f2fs_sops = {
3249         .alloc_inode    = f2fs_alloc_inode,
3250         .free_inode     = f2fs_free_inode,
3251         .drop_inode     = f2fs_drop_inode,
3252         .write_inode    = f2fs_write_inode,
3253         .dirty_inode    = f2fs_dirty_inode,
3254         .show_options   = f2fs_show_options,
3255 #ifdef CONFIG_QUOTA
3256         .quota_read     = f2fs_quota_read,
3257         .quota_write    = f2fs_quota_write,
3258         .get_dquots     = f2fs_get_dquots,
3259 #endif
3260         .evict_inode    = f2fs_evict_inode,
3261         .put_super      = f2fs_put_super,
3262         .sync_fs        = f2fs_sync_fs,
3263         .freeze_fs      = f2fs_freeze,
3264         .unfreeze_fs    = f2fs_unfreeze,
3265         .statfs         = f2fs_statfs,
3266         .remount_fs     = f2fs_remount,
3267         .shutdown       = f2fs_shutdown,
3268 };
3269
3270 #ifdef CONFIG_FS_ENCRYPTION
3271 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3272 {
3273         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3274                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3275                                 ctx, len, NULL);
3276 }
3277
3278 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3279                                                         void *fs_data)
3280 {
3281         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3282
3283         /*
3284          * Encrypting the root directory is not allowed because fsck
3285          * expects lost+found directory to exist and remain unencrypted
3286          * if LOST_FOUND feature is enabled.
3287          *
3288          */
3289         if (f2fs_sb_has_lost_found(sbi) &&
3290                         inode->i_ino == F2FS_ROOT_INO(sbi))
3291                 return -EPERM;
3292
3293         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3294                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3295                                 ctx, len, fs_data, XATTR_CREATE);
3296 }
3297
3298 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3299 {
3300         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3301 }
3302
3303 static bool f2fs_has_stable_inodes(struct super_block *sb)
3304 {
3305         return true;
3306 }
3307
3308 static struct block_device **f2fs_get_devices(struct super_block *sb,
3309                                               unsigned int *num_devs)
3310 {
3311         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3312         struct block_device **devs;
3313         int i;
3314
3315         if (!f2fs_is_multi_device(sbi))
3316                 return NULL;
3317
3318         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3319         if (!devs)
3320                 return ERR_PTR(-ENOMEM);
3321
3322         for (i = 0; i < sbi->s_ndevs; i++)
3323                 devs[i] = FDEV(i).bdev;
3324         *num_devs = sbi->s_ndevs;
3325         return devs;
3326 }
3327
3328 static const struct fscrypt_operations f2fs_cryptops = {
3329         .needs_bounce_pages     = 1,
3330         .has_32bit_inodes       = 1,
3331         .supports_subblock_data_units = 1,
3332         .legacy_key_prefix      = "f2fs:",
3333         .get_context            = f2fs_get_context,
3334         .set_context            = f2fs_set_context,
3335         .get_dummy_policy       = f2fs_get_dummy_policy,
3336         .empty_dir              = f2fs_empty_dir,
3337         .has_stable_inodes      = f2fs_has_stable_inodes,
3338         .get_devices            = f2fs_get_devices,
3339 };
3340 #endif
3341
3342 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3343                 u64 ino, u32 generation)
3344 {
3345         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3346         struct inode *inode;
3347
3348         if (f2fs_check_nid_range(sbi, ino))
3349                 return ERR_PTR(-ESTALE);
3350
3351         /*
3352          * f2fs_iget isn't quite right if the inode is currently unallocated!
3353          * However f2fs_iget currently does appropriate checks to handle stale
3354          * inodes so everything is OK.
3355          */
3356         inode = f2fs_iget(sb, ino);
3357         if (IS_ERR(inode))
3358                 return ERR_CAST(inode);
3359         if (unlikely(generation && inode->i_generation != generation)) {
3360                 /* we didn't find the right inode.. */
3361                 iput(inode);
3362                 return ERR_PTR(-ESTALE);
3363         }
3364         return inode;
3365 }
3366
3367 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3368                 int fh_len, int fh_type)
3369 {
3370         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3371                                     f2fs_nfs_get_inode);
3372 }
3373
3374 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3375                 int fh_len, int fh_type)
3376 {
3377         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3378                                     f2fs_nfs_get_inode);
3379 }
3380
3381 static const struct export_operations f2fs_export_ops = {
3382         .encode_fh = generic_encode_ino32_fh,
3383         .fh_to_dentry = f2fs_fh_to_dentry,
3384         .fh_to_parent = f2fs_fh_to_parent,
3385         .get_parent = f2fs_get_parent,
3386 };
3387
3388 loff_t max_file_blocks(struct inode *inode)
3389 {
3390         loff_t result = 0;
3391         loff_t leaf_count;
3392
3393         /*
3394          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3395          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3396          * space in inode.i_addr, it will be more safe to reassign
3397          * result as zero.
3398          */
3399
3400         if (inode && f2fs_compressed_file(inode))
3401                 leaf_count = ADDRS_PER_BLOCK(inode);
3402         else
3403                 leaf_count = DEF_ADDRS_PER_BLOCK;
3404
3405         /* two direct node blocks */
3406         result += (leaf_count * 2);
3407
3408         /* two indirect node blocks */
3409         leaf_count *= NIDS_PER_BLOCK;
3410         result += (leaf_count * 2);
3411
3412         /* one double indirect node block */
3413         leaf_count *= NIDS_PER_BLOCK;
3414         result += leaf_count;
3415
3416         /*
3417          * For compatibility with FSCRYPT_POLICY_FLAG_IV_INO_LBLK_{64,32} with
3418          * a 4K crypto data unit, we must restrict the max filesize to what can
3419          * fit within U32_MAX + 1 data units.
3420          */
3421
3422         result = umin(result, F2FS_BYTES_TO_BLK(((loff_t)U32_MAX + 1) * 4096));
3423
3424         return result;
3425 }
3426
3427 static int __f2fs_commit_super(struct f2fs_sb_info *sbi, struct folio *folio,
3428                                                 pgoff_t index, bool update)
3429 {
3430         struct bio *bio;
3431         /* it's rare case, we can do fua all the time */
3432         blk_opf_t opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA;
3433         int ret;
3434
3435         folio_lock(folio);
3436         folio_wait_writeback(folio);
3437         if (update)
3438                 memcpy(F2FS_SUPER_BLOCK(folio, index), F2FS_RAW_SUPER(sbi),
3439                                         sizeof(struct f2fs_super_block));
3440         folio_mark_dirty(folio);
3441         folio_clear_dirty_for_io(folio);
3442         folio_start_writeback(folio);
3443         folio_unlock(folio);
3444
3445         bio = bio_alloc(sbi->sb->s_bdev, 1, opf, GFP_NOFS);
3446
3447         /* it doesn't need to set crypto context for superblock update */
3448         bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(folio->index);
3449
3450         if (!bio_add_folio(bio, folio, folio_size(folio), 0))
3451                 f2fs_bug_on(sbi, 1);
3452
3453         ret = submit_bio_wait(bio);
3454         folio_end_writeback(folio);
3455
3456         return ret;
3457 }
3458
3459 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3460                                         struct folio *folio, pgoff_t index)
3461 {
3462         struct f2fs_super_block *raw_super = F2FS_SUPER_BLOCK(folio, index);
3463         struct super_block *sb = sbi->sb;
3464         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3465         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3466         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3467         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3468         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3469         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3470         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3471         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3472         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3473         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3474         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3475         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3476         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3477         u64 main_end_blkaddr = main_blkaddr +
3478                                 ((u64)segment_count_main << log_blocks_per_seg);
3479         u64 seg_end_blkaddr = segment0_blkaddr +
3480                                 ((u64)segment_count << log_blocks_per_seg);
3481
3482         if (segment0_blkaddr != cp_blkaddr) {
3483                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3484                           segment0_blkaddr, cp_blkaddr);
3485                 return true;
3486         }
3487
3488         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3489                                                         sit_blkaddr) {
3490                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3491                           cp_blkaddr, sit_blkaddr,
3492                           segment_count_ckpt << log_blocks_per_seg);
3493                 return true;
3494         }
3495
3496         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3497                                                         nat_blkaddr) {
3498                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3499                           sit_blkaddr, nat_blkaddr,
3500                           segment_count_sit << log_blocks_per_seg);
3501                 return true;
3502         }
3503
3504         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3505                                                         ssa_blkaddr) {
3506                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3507                           nat_blkaddr, ssa_blkaddr,
3508                           segment_count_nat << log_blocks_per_seg);
3509                 return true;
3510         }
3511
3512         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3513                                                         main_blkaddr) {
3514                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3515                           ssa_blkaddr, main_blkaddr,
3516                           segment_count_ssa << log_blocks_per_seg);
3517                 return true;
3518         }
3519
3520         if (main_end_blkaddr > seg_end_blkaddr) {
3521                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3522                           main_blkaddr, seg_end_blkaddr,
3523                           segment_count_main << log_blocks_per_seg);
3524                 return true;
3525         } else if (main_end_blkaddr < seg_end_blkaddr) {
3526                 int err = 0;
3527                 char *res;
3528
3529                 /* fix in-memory information all the time */
3530                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3531                                 segment0_blkaddr) >> log_blocks_per_seg);
3532
3533                 if (f2fs_readonly(sb) || f2fs_hw_is_readonly(sbi)) {
3534                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3535                         res = "internally";
3536                 } else {
3537                         err = __f2fs_commit_super(sbi, folio, index, false);
3538                         res = err ? "failed" : "done";
3539                 }
3540                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3541                           res, main_blkaddr, seg_end_blkaddr,
3542                           segment_count_main << log_blocks_per_seg);
3543                 if (err)
3544                         return true;
3545         }
3546         return false;
3547 }
3548
3549 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3550                                         struct folio *folio, pgoff_t index)
3551 {
3552         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3553         block_t total_sections, blocks_per_seg;
3554         struct f2fs_super_block *raw_super = F2FS_SUPER_BLOCK(folio, index);
3555         size_t crc_offset = 0;
3556         __u32 crc = 0;
3557
3558         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3559                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3560                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3561                 return -EINVAL;
3562         }
3563
3564         /* Check checksum_offset and crc in superblock */
3565         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3566                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3567                 if (crc_offset !=
3568                         offsetof(struct f2fs_super_block, crc)) {
3569                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3570                                   crc_offset);
3571                         return -EFSCORRUPTED;
3572                 }
3573                 crc = le32_to_cpu(raw_super->crc);
3574                 if (crc != f2fs_crc32(raw_super, crc_offset)) {
3575                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3576                         return -EFSCORRUPTED;
3577                 }
3578         }
3579
3580         /* only support block_size equals to PAGE_SIZE */
3581         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3582                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3583                           le32_to_cpu(raw_super->log_blocksize),
3584                           F2FS_BLKSIZE_BITS);
3585                 return -EFSCORRUPTED;
3586         }
3587
3588         /* check log blocks per segment */
3589         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3590                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3591                           le32_to_cpu(raw_super->log_blocks_per_seg));
3592                 return -EFSCORRUPTED;
3593         }
3594
3595         /* Currently, support 512/1024/2048/4096/16K bytes sector size */
3596         if (le32_to_cpu(raw_super->log_sectorsize) >
3597                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3598                 le32_to_cpu(raw_super->log_sectorsize) <
3599                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3600                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3601                           le32_to_cpu(raw_super->log_sectorsize));
3602                 return -EFSCORRUPTED;
3603         }
3604         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3605                 le32_to_cpu(raw_super->log_sectorsize) !=
3606                         F2FS_MAX_LOG_SECTOR_SIZE) {
3607                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3608                           le32_to_cpu(raw_super->log_sectors_per_block),
3609                           le32_to_cpu(raw_super->log_sectorsize));
3610                 return -EFSCORRUPTED;
3611         }
3612
3613         segment_count = le32_to_cpu(raw_super->segment_count);
3614         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3615         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3616         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3617         total_sections = le32_to_cpu(raw_super->section_count);
3618
3619         /* blocks_per_seg should be 512, given the above check */
3620         blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg));
3621
3622         if (segment_count > F2FS_MAX_SEGMENT ||
3623                                 segment_count < F2FS_MIN_SEGMENTS) {
3624                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3625                 return -EFSCORRUPTED;
3626         }
3627
3628         if (total_sections > segment_count_main || total_sections < 1 ||
3629                         segs_per_sec > segment_count || !segs_per_sec) {
3630                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3631                           segment_count, total_sections, segs_per_sec);
3632                 return -EFSCORRUPTED;
3633         }
3634
3635         if (segment_count_main != total_sections * segs_per_sec) {
3636                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3637                           segment_count_main, total_sections, segs_per_sec);
3638                 return -EFSCORRUPTED;
3639         }
3640
3641         if ((segment_count / segs_per_sec) < total_sections) {
3642                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3643                           segment_count, segs_per_sec, total_sections);
3644                 return -EFSCORRUPTED;
3645         }
3646
3647         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3648                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3649                           segment_count, le64_to_cpu(raw_super->block_count));
3650                 return -EFSCORRUPTED;
3651         }
3652
3653         if (RDEV(0).path[0]) {
3654                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3655                 int i = 1;
3656
3657                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3658                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3659                         i++;
3660                 }
3661                 if (segment_count != dev_seg_count) {
3662                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3663                                         segment_count, dev_seg_count);
3664                         return -EFSCORRUPTED;
3665                 }
3666         } else {
3667                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3668                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3669                         f2fs_info(sbi, "Zoned block device path is missing");
3670                         return -EFSCORRUPTED;
3671                 }
3672         }
3673
3674         if (secs_per_zone > total_sections || !secs_per_zone) {
3675                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3676                           secs_per_zone, total_sections);
3677                 return -EFSCORRUPTED;
3678         }
3679         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3680                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3681                         (le32_to_cpu(raw_super->extension_count) +
3682                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3683                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3684                           le32_to_cpu(raw_super->extension_count),
3685                           raw_super->hot_ext_count,
3686                           F2FS_MAX_EXTENSION);
3687                 return -EFSCORRUPTED;
3688         }
3689
3690         if (le32_to_cpu(raw_super->cp_payload) >=
3691                                 (blocks_per_seg - F2FS_CP_PACKS -
3692                                 NR_CURSEG_PERSIST_TYPE)) {
3693                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3694                           le32_to_cpu(raw_super->cp_payload),
3695                           blocks_per_seg - F2FS_CP_PACKS -
3696                           NR_CURSEG_PERSIST_TYPE);
3697                 return -EFSCORRUPTED;
3698         }
3699
3700         /* check reserved ino info */
3701         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3702                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3703                 le32_to_cpu(raw_super->root_ino) != 3) {
3704                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3705                           le32_to_cpu(raw_super->node_ino),
3706                           le32_to_cpu(raw_super->meta_ino),
3707                           le32_to_cpu(raw_super->root_ino));
3708                 return -EFSCORRUPTED;
3709         }
3710
3711         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3712         if (sanity_check_area_boundary(sbi, folio, index))
3713                 return -EFSCORRUPTED;
3714
3715         return 0;
3716 }
3717
3718 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3719 {
3720         unsigned int total, fsmeta;
3721         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3722         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3723         unsigned int ovp_segments, reserved_segments;
3724         unsigned int main_segs, blocks_per_seg;
3725         unsigned int sit_segs, nat_segs;
3726         unsigned int sit_bitmap_size, nat_bitmap_size;
3727         unsigned int log_blocks_per_seg;
3728         unsigned int segment_count_main;
3729         unsigned int cp_pack_start_sum, cp_payload;
3730         block_t user_block_count, valid_user_blocks;
3731         block_t avail_node_count, valid_node_count;
3732         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3733         unsigned int sit_blk_cnt;
3734         int i, j;
3735
3736         total = le32_to_cpu(raw_super->segment_count);
3737         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3738         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3739         fsmeta += sit_segs;
3740         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3741         fsmeta += nat_segs;
3742         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3743         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3744
3745         if (unlikely(fsmeta >= total))
3746                 return 1;
3747
3748         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3749         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3750
3751         if (!f2fs_sb_has_readonly(sbi) &&
3752                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3753                         ovp_segments == 0 || reserved_segments == 0)) {
3754                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3755                 return 1;
3756         }
3757         user_block_count = le64_to_cpu(ckpt->user_block_count);
3758         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3759                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3760         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3761         if (!user_block_count || user_block_count >=
3762                         segment_count_main << log_blocks_per_seg) {
3763                 f2fs_err(sbi, "Wrong user_block_count: %u",
3764                          user_block_count);
3765                 return 1;
3766         }
3767
3768         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3769         if (valid_user_blocks > user_block_count) {
3770                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3771                          valid_user_blocks, user_block_count);
3772                 return 1;
3773         }
3774
3775         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3776         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3777         if (valid_node_count > avail_node_count) {
3778                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3779                          valid_node_count, avail_node_count);
3780                 return 1;
3781         }
3782
3783         main_segs = le32_to_cpu(raw_super->segment_count_main);
3784         blocks_per_seg = BLKS_PER_SEG(sbi);
3785
3786         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3787                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3788                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3789                         return 1;
3790
3791                 if (f2fs_sb_has_readonly(sbi))
3792                         goto check_data;
3793
3794                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3795                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3796                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3797                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3798                                          i, j,
3799                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3800                                 return 1;
3801                         }
3802                 }
3803         }
3804 check_data:
3805         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3806                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3807                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3808                         return 1;
3809
3810                 if (f2fs_sb_has_readonly(sbi))
3811                         goto skip_cross;
3812
3813                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3814                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3815                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3816                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3817                                          i, j,
3818                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3819                                 return 1;
3820                         }
3821                 }
3822         }
3823         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3824                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3825                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3826                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3827                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3828                                          i, j,
3829                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3830                                 return 1;
3831                         }
3832                 }
3833         }
3834 skip_cross:
3835         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3836         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3837
3838         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3839                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3840                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3841                          sit_bitmap_size, nat_bitmap_size);
3842                 return 1;
3843         }
3844
3845         sit_blk_cnt = DIV_ROUND_UP(main_segs, SIT_ENTRY_PER_BLOCK);
3846         if (sit_bitmap_size * 8 < sit_blk_cnt) {
3847                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, sit_blk_cnt:%u",
3848                          sit_bitmap_size, sit_blk_cnt);
3849                 return 1;
3850         }
3851
3852         cp_pack_start_sum = __start_sum_addr(sbi);
3853         cp_payload = __cp_payload(sbi);
3854         if (cp_pack_start_sum < cp_payload + 1 ||
3855                 cp_pack_start_sum > blocks_per_seg - 1 -
3856                         NR_CURSEG_PERSIST_TYPE) {
3857                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3858                          cp_pack_start_sum);
3859                 return 1;
3860         }
3861
3862         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3863                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3864                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3865                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3866                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3867                           le32_to_cpu(ckpt->checksum_offset));
3868                 return 1;
3869         }
3870
3871         nat_blocks = nat_segs << log_blocks_per_seg;
3872         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3873         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3874         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3875                 (cp_payload + F2FS_CP_PACKS +
3876                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3877                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3878                           cp_payload, nat_bits_blocks);
3879                 return 1;
3880         }
3881
3882         if (unlikely(f2fs_cp_error(sbi))) {
3883                 f2fs_err(sbi, "A bug case: need to run fsck");
3884                 return 1;
3885         }
3886         return 0;
3887 }
3888
3889 static void init_sb_info(struct f2fs_sb_info *sbi)
3890 {
3891         struct f2fs_super_block *raw_super = sbi->raw_super;
3892         int i;
3893
3894         sbi->log_sectors_per_block =
3895                 le32_to_cpu(raw_super->log_sectors_per_block);
3896         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3897         sbi->blocksize = BIT(sbi->log_blocksize);
3898         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3899         sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg);
3900         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3901         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3902         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3903         sbi->total_node_count = SEGS_TO_BLKS(sbi,
3904                         ((le32_to_cpu(raw_super->segment_count_nat) / 2) *
3905                         NAT_ENTRY_PER_BLOCK));
3906         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3907         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3908         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3909         sbi->cur_victim_sec = NULL_SECNO;
3910         sbi->gc_mode = GC_NORMAL;
3911         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3912         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3913         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3914         sbi->migration_granularity = SEGS_PER_SEC(sbi);
3915         sbi->migration_window_granularity = f2fs_sb_has_blkzoned(sbi) ?
3916                 DEF_MIGRATION_WINDOW_GRANULARITY_ZONED : SEGS_PER_SEC(sbi);
3917         sbi->seq_file_ra_mul = MIN_RA_MUL;
3918         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3919         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3920         spin_lock_init(&sbi->gc_remaining_trials_lock);
3921         atomic64_set(&sbi->current_atomic_write, 0);
3922
3923         sbi->dir_level = DEF_DIR_LEVEL;
3924         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3925         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3926         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3927         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3928         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3929         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3930                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3931         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3932
3933         for (i = 0; i < NR_COUNT_TYPE; i++)
3934                 atomic_set(&sbi->nr_pages[i], 0);
3935
3936         for (i = 0; i < META; i++)
3937                 atomic_set(&sbi->wb_sync_req[i], 0);
3938
3939         INIT_LIST_HEAD(&sbi->s_list);
3940         mutex_init(&sbi->umount_mutex);
3941         init_f2fs_rwsem(&sbi->io_order_lock);
3942         spin_lock_init(&sbi->cp_lock);
3943
3944         sbi->dirty_device = 0;
3945         spin_lock_init(&sbi->dev_lock);
3946
3947         init_f2fs_rwsem(&sbi->sb_lock);
3948         init_f2fs_rwsem(&sbi->pin_sem);
3949 }
3950
3951 static int init_percpu_info(struct f2fs_sb_info *sbi)
3952 {
3953         int err;
3954
3955         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3956         if (err)
3957                 return err;
3958
3959         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3960         if (err)
3961                 goto err_valid_block;
3962
3963         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3964                                                                 GFP_KERNEL);
3965         if (err)
3966                 goto err_node_block;
3967         return 0;
3968
3969 err_node_block:
3970         percpu_counter_destroy(&sbi->rf_node_block_count);
3971 err_valid_block:
3972         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3973         return err;
3974 }
3975
3976 #ifdef CONFIG_BLK_DEV_ZONED
3977
3978 struct f2fs_report_zones_args {
3979         struct f2fs_sb_info *sbi;
3980         struct f2fs_dev_info *dev;
3981 };
3982
3983 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3984                               void *data)
3985 {
3986         struct f2fs_report_zones_args *rz_args = data;
3987         block_t unusable_blocks = (zone->len - zone->capacity) >>
3988                                         F2FS_LOG_SECTORS_PER_BLOCK;
3989
3990         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3991                 return 0;
3992
3993         set_bit(idx, rz_args->dev->blkz_seq);
3994         if (!rz_args->sbi->unusable_blocks_per_sec) {
3995                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3996                 return 0;
3997         }
3998         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3999                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
4000                 return -EINVAL;
4001         }
4002         return 0;
4003 }
4004
4005 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
4006 {
4007         struct block_device *bdev = FDEV(devi).bdev;
4008         sector_t nr_sectors = bdev_nr_sectors(bdev);
4009         struct f2fs_report_zones_args rep_zone_arg;
4010         u64 zone_sectors;
4011         unsigned int max_open_zones;
4012         int ret;
4013
4014         if (!f2fs_sb_has_blkzoned(sbi))
4015                 return 0;
4016
4017         if (bdev_is_zoned(FDEV(devi).bdev)) {
4018                 max_open_zones = bdev_max_open_zones(bdev);
4019                 if (max_open_zones && (max_open_zones < sbi->max_open_zones))
4020                         sbi->max_open_zones = max_open_zones;
4021                 if (sbi->max_open_zones < F2FS_OPTION(sbi).active_logs) {
4022                         f2fs_err(sbi,
4023                                 "zoned: max open zones %u is too small, need at least %u open zones",
4024                                 sbi->max_open_zones, F2FS_OPTION(sbi).active_logs);
4025                         return -EINVAL;
4026                 }
4027         }
4028
4029         zone_sectors = bdev_zone_sectors(bdev);
4030         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
4031                                 SECTOR_TO_BLOCK(zone_sectors))
4032                 return -EINVAL;
4033         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
4034         FDEV(devi).nr_blkz = div_u64(SECTOR_TO_BLOCK(nr_sectors),
4035                                         sbi->blocks_per_blkz);
4036         if (nr_sectors & (zone_sectors - 1))
4037                 FDEV(devi).nr_blkz++;
4038
4039         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
4040                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
4041                                         * sizeof(unsigned long),
4042                                         GFP_KERNEL);
4043         if (!FDEV(devi).blkz_seq)
4044                 return -ENOMEM;
4045
4046         rep_zone_arg.sbi = sbi;
4047         rep_zone_arg.dev = &FDEV(devi);
4048
4049         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
4050                                   &rep_zone_arg);
4051         if (ret < 0)
4052                 return ret;
4053         return 0;
4054 }
4055 #endif
4056
4057 /*
4058  * Read f2fs raw super block.
4059  * Because we have two copies of super block, so read both of them
4060  * to get the first valid one. If any one of them is broken, we pass
4061  * them recovery flag back to the caller.
4062  */
4063 static int read_raw_super_block(struct f2fs_sb_info *sbi,
4064                         struct f2fs_super_block **raw_super,
4065                         int *valid_super_block, int *recovery)
4066 {
4067         struct super_block *sb = sbi->sb;
4068         int block;
4069         struct folio *folio;
4070         struct f2fs_super_block *super;
4071         int err = 0;
4072
4073         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
4074         if (!super)
4075                 return -ENOMEM;
4076
4077         for (block = 0; block < 2; block++) {
4078                 folio = read_mapping_folio(sb->s_bdev->bd_mapping, block, NULL);
4079                 if (IS_ERR(folio)) {
4080                         f2fs_err(sbi, "Unable to read %dth superblock",
4081                                  block + 1);
4082                         err = PTR_ERR(folio);
4083                         *recovery = 1;
4084                         continue;
4085                 }
4086
4087                 /* sanity checking of raw super */
4088                 err = sanity_check_raw_super(sbi, folio, block);
4089                 if (err) {
4090                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
4091                                  block + 1);
4092                         folio_put(folio);
4093                         *recovery = 1;
4094                         continue;
4095                 }
4096
4097                 if (!*raw_super) {
4098                         memcpy(super, F2FS_SUPER_BLOCK(folio, block),
4099                                                         sizeof(*super));
4100                         *valid_super_block = block;
4101                         *raw_super = super;
4102                 }
4103                 folio_put(folio);
4104         }
4105
4106         /* No valid superblock */
4107         if (!*raw_super)
4108                 kfree(super);
4109         else
4110                 err = 0;
4111
4112         return err;
4113 }
4114
4115 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
4116 {
4117         struct folio *folio;
4118         pgoff_t index;
4119         __u32 crc = 0;
4120         int err;
4121
4122         if ((recover && f2fs_readonly(sbi->sb)) ||
4123                                 f2fs_hw_is_readonly(sbi)) {
4124                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
4125                 return -EROFS;
4126         }
4127
4128         /* we should update superblock crc here */
4129         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
4130                 crc = f2fs_crc32(F2FS_RAW_SUPER(sbi),
4131                                 offsetof(struct f2fs_super_block, crc));
4132                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
4133         }
4134
4135         /* write back-up superblock first */
4136         index = sbi->valid_super_block ? 0 : 1;
4137         folio = read_mapping_folio(sbi->sb->s_bdev->bd_mapping, index, NULL);
4138         if (IS_ERR(folio))
4139                 return PTR_ERR(folio);
4140         err = __f2fs_commit_super(sbi, folio, index, true);
4141         folio_put(folio);
4142
4143         /* if we are in recovery path, skip writing valid superblock */
4144         if (recover || err)
4145                 return err;
4146
4147         /* write current valid superblock */
4148         index = sbi->valid_super_block;
4149         folio = read_mapping_folio(sbi->sb->s_bdev->bd_mapping, index, NULL);
4150         if (IS_ERR(folio))
4151                 return PTR_ERR(folio);
4152         err = __f2fs_commit_super(sbi, folio, index, true);
4153         folio_put(folio);
4154         return err;
4155 }
4156
4157 static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
4158 {
4159         unsigned long flags;
4160
4161         spin_lock_irqsave(&sbi->error_lock, flags);
4162         if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
4163                 sbi->stop_reason[reason]++;
4164         spin_unlock_irqrestore(&sbi->error_lock, flags);
4165 }
4166
4167 static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
4168 {
4169         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4170         unsigned long flags;
4171         int err;
4172
4173         f2fs_down_write(&sbi->sb_lock);
4174
4175         spin_lock_irqsave(&sbi->error_lock, flags);
4176         if (sbi->error_dirty) {
4177                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4178                                                         MAX_F2FS_ERRORS);
4179                 sbi->error_dirty = false;
4180         }
4181         memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
4182         spin_unlock_irqrestore(&sbi->error_lock, flags);
4183
4184         err = f2fs_commit_super(sbi, false);
4185
4186         f2fs_up_write(&sbi->sb_lock);
4187         if (err)
4188                 f2fs_err_ratelimited(sbi,
4189                         "f2fs_commit_super fails to record stop_reason, err:%d",
4190                         err);
4191 }
4192
4193 void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
4194 {
4195         unsigned long flags;
4196
4197         spin_lock_irqsave(&sbi->error_lock, flags);
4198         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
4199                 set_bit(flag, (unsigned long *)sbi->errors);
4200                 sbi->error_dirty = true;
4201         }
4202         spin_unlock_irqrestore(&sbi->error_lock, flags);
4203 }
4204
4205 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
4206 {
4207         unsigned long flags;
4208         bool need_update = false;
4209
4210         spin_lock_irqsave(&sbi->error_lock, flags);
4211         if (sbi->error_dirty) {
4212                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4213                                                         MAX_F2FS_ERRORS);
4214                 sbi->error_dirty = false;
4215                 need_update = true;
4216         }
4217         spin_unlock_irqrestore(&sbi->error_lock, flags);
4218
4219         return need_update;
4220 }
4221
4222 static void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error)
4223 {
4224         int err;
4225
4226         f2fs_down_write(&sbi->sb_lock);
4227
4228         if (!f2fs_update_errors(sbi))
4229                 goto out_unlock;
4230
4231         err = f2fs_commit_super(sbi, false);
4232         if (err)
4233                 f2fs_err_ratelimited(sbi,
4234                         "f2fs_commit_super fails to record errors:%u, err:%d",
4235                         error, err);
4236 out_unlock:
4237         f2fs_up_write(&sbi->sb_lock);
4238 }
4239
4240 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
4241 {
4242         f2fs_save_errors(sbi, error);
4243         f2fs_record_errors(sbi, error);
4244 }
4245
4246 void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error)
4247 {
4248         f2fs_save_errors(sbi, error);
4249
4250         if (!sbi->error_dirty)
4251                 return;
4252         if (!test_bit(error, (unsigned long *)sbi->errors))
4253                 return;
4254         schedule_work(&sbi->s_error_work);
4255 }
4256
4257 static bool system_going_down(void)
4258 {
4259         return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
4260                 || system_state == SYSTEM_RESTART;
4261 }
4262
4263 void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason)
4264 {
4265         struct super_block *sb = sbi->sb;
4266         bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
4267         bool continue_fs = !shutdown &&
4268                         F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
4269
4270         set_ckpt_flags(sbi, CP_ERROR_FLAG);
4271
4272         if (!f2fs_hw_is_readonly(sbi)) {
4273                 save_stop_reason(sbi, reason);
4274
4275                 /*
4276                  * always create an asynchronous task to record stop_reason
4277                  * in order to avoid potential deadlock when running into
4278                  * f2fs_record_stop_reason() synchronously.
4279                  */
4280                 schedule_work(&sbi->s_error_work);
4281         }
4282
4283         /*
4284          * We force ERRORS_RO behavior when system is rebooting. Otherwise we
4285          * could panic during 'reboot -f' as the underlying device got already
4286          * disabled.
4287          */
4288         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
4289                                 !shutdown && !system_going_down() &&
4290                                 !is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN))
4291                 panic("F2FS-fs (device %s): panic forced after error\n",
4292                                                         sb->s_id);
4293
4294         if (shutdown)
4295                 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
4296         else
4297                 dump_stack();
4298
4299         /*
4300          * Continue filesystem operators if errors=continue. Should not set
4301          * RO by shutdown, since RO bypasses thaw_super which can hang the
4302          * system.
4303          */
4304         if (continue_fs || f2fs_readonly(sb) || shutdown) {
4305                 f2fs_warn(sbi, "Stopped filesystem due to reason: %d", reason);
4306                 return;
4307         }
4308
4309         f2fs_warn(sbi, "Remounting filesystem read-only");
4310
4311         /*
4312          * We have already set CP_ERROR_FLAG flag to stop all updates
4313          * to filesystem, so it doesn't need to set SB_RDONLY flag here
4314          * because the flag should be set covered w/ sb->s_umount semaphore
4315          * via remount procedure, otherwise, it will confuse code like
4316          * freeze_super() which will lead to deadlocks and other problems.
4317          */
4318 }
4319
4320 static void f2fs_record_error_work(struct work_struct *work)
4321 {
4322         struct f2fs_sb_info *sbi = container_of(work,
4323                                         struct f2fs_sb_info, s_error_work);
4324
4325         f2fs_record_stop_reason(sbi);
4326 }
4327
4328 static inline unsigned int get_first_seq_zone_segno(struct f2fs_sb_info *sbi)
4329 {
4330 #ifdef CONFIG_BLK_DEV_ZONED
4331         unsigned int zoneno, total_zones;
4332         int devi;
4333
4334         if (!f2fs_sb_has_blkzoned(sbi))
4335                 return NULL_SEGNO;
4336
4337         for (devi = 0; devi < sbi->s_ndevs; devi++) {
4338                 if (!bdev_is_zoned(FDEV(devi).bdev))
4339                         continue;
4340
4341                 total_zones = GET_ZONE_FROM_SEG(sbi, FDEV(devi).total_segments);
4342
4343                 for (zoneno = 0; zoneno < total_zones; zoneno++) {
4344                         unsigned int segs, blks;
4345
4346                         if (!f2fs_zone_is_seq(sbi, devi, zoneno))
4347                                 continue;
4348
4349                         segs = GET_SEG_FROM_SEC(sbi,
4350                                         zoneno * sbi->secs_per_zone);
4351                         blks = SEGS_TO_BLKS(sbi, segs);
4352                         return GET_SEGNO(sbi, FDEV(devi).start_blk + blks);
4353                 }
4354         }
4355 #endif
4356         return NULL_SEGNO;
4357 }
4358
4359 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
4360 {
4361         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4362         unsigned int max_devices = MAX_DEVICES;
4363         unsigned int logical_blksize;
4364         blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
4365         int i;
4366
4367         /* Initialize single device information */
4368         if (!RDEV(0).path[0]) {
4369                 if (!bdev_is_zoned(sbi->sb->s_bdev))
4370                         return 0;
4371                 max_devices = 1;
4372         }
4373
4374         /*
4375          * Initialize multiple devices information, or single
4376          * zoned block device information.
4377          */
4378         sbi->devs = f2fs_kzalloc(sbi,
4379                                  array_size(max_devices,
4380                                             sizeof(struct f2fs_dev_info)),
4381                                  GFP_KERNEL);
4382         if (!sbi->devs)
4383                 return -ENOMEM;
4384
4385         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
4386         sbi->aligned_blksize = true;
4387 #ifdef CONFIG_BLK_DEV_ZONED
4388         sbi->max_open_zones = UINT_MAX;
4389         sbi->blkzone_alloc_policy = BLKZONE_ALLOC_PRIOR_SEQ;
4390 #endif
4391
4392         for (i = 0; i < max_devices; i++) {
4393                 if (max_devices == 1) {
4394                         FDEV(i).total_segments =
4395                                 le32_to_cpu(raw_super->segment_count_main);
4396                         FDEV(i).start_blk = 0;
4397                         FDEV(i).end_blk = FDEV(i).total_segments *
4398                                                 BLKS_PER_SEG(sbi);
4399                 }
4400
4401                 if (i == 0)
4402                         FDEV(0).bdev_file = sbi->sb->s_bdev_file;
4403                 else if (!RDEV(i).path[0])
4404                         break;
4405
4406                 if (max_devices > 1) {
4407                         /* Multi-device mount */
4408                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
4409                         FDEV(i).total_segments =
4410                                 le32_to_cpu(RDEV(i).total_segments);
4411                         if (i == 0) {
4412                                 FDEV(i).start_blk = 0;
4413                                 FDEV(i).end_blk = FDEV(i).start_blk +
4414                                         SEGS_TO_BLKS(sbi,
4415                                         FDEV(i).total_segments) - 1 +
4416                                         le32_to_cpu(raw_super->segment0_blkaddr);
4417                         } else {
4418                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
4419                                 FDEV(i).end_blk = FDEV(i).start_blk +
4420                                                 SEGS_TO_BLKS(sbi,
4421                                                 FDEV(i).total_segments) - 1;
4422                                 FDEV(i).bdev_file = bdev_file_open_by_path(
4423                                         FDEV(i).path, mode, sbi->sb, NULL);
4424                         }
4425                 }
4426                 if (IS_ERR(FDEV(i).bdev_file))
4427                         return PTR_ERR(FDEV(i).bdev_file);
4428
4429                 FDEV(i).bdev = file_bdev(FDEV(i).bdev_file);
4430                 /* to release errored devices */
4431                 sbi->s_ndevs = i + 1;
4432
4433                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4434                         sbi->aligned_blksize = false;
4435
4436 #ifdef CONFIG_BLK_DEV_ZONED
4437                 if (bdev_is_zoned(FDEV(i).bdev)) {
4438                         if (!f2fs_sb_has_blkzoned(sbi)) {
4439                                 f2fs_err(sbi, "Zoned block device feature not enabled");
4440                                 return -EINVAL;
4441                         }
4442                         if (init_blkz_info(sbi, i)) {
4443                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
4444                                 return -EINVAL;
4445                         }
4446                         if (max_devices == 1)
4447                                 break;
4448                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: Host-managed)",
4449                                   i, FDEV(i).path,
4450                                   FDEV(i).total_segments,
4451                                   FDEV(i).start_blk, FDEV(i).end_blk);
4452                         continue;
4453                 }
4454 #endif
4455                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4456                           i, FDEV(i).path,
4457                           FDEV(i).total_segments,
4458                           FDEV(i).start_blk, FDEV(i).end_blk);
4459         }
4460         return 0;
4461 }
4462
4463 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4464 {
4465 #if IS_ENABLED(CONFIG_UNICODE)
4466         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4467                 const struct f2fs_sb_encodings *encoding_info;
4468                 struct unicode_map *encoding;
4469                 __u16 encoding_flags;
4470
4471                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4472                 if (!encoding_info) {
4473                         f2fs_err(sbi,
4474                                  "Encoding requested by superblock is unknown");
4475                         return -EINVAL;
4476                 }
4477
4478                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4479                 encoding = utf8_load(encoding_info->version);
4480                 if (IS_ERR(encoding)) {
4481                         f2fs_err(sbi,
4482                                  "can't mount with superblock charset: %s-%u.%u.%u "
4483                                  "not supported by the kernel. flags: 0x%x.",
4484                                  encoding_info->name,
4485                                  unicode_major(encoding_info->version),
4486                                  unicode_minor(encoding_info->version),
4487                                  unicode_rev(encoding_info->version),
4488                                  encoding_flags);
4489                         return PTR_ERR(encoding);
4490                 }
4491                 f2fs_info(sbi, "Using encoding defined by superblock: "
4492                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4493                          unicode_major(encoding_info->version),
4494                          unicode_minor(encoding_info->version),
4495                          unicode_rev(encoding_info->version),
4496                          encoding_flags);
4497
4498                 sbi->sb->s_encoding = encoding;
4499                 sbi->sb->s_encoding_flags = encoding_flags;
4500         }
4501 #else
4502         if (f2fs_sb_has_casefold(sbi)) {
4503                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4504                 return -EINVAL;
4505         }
4506 #endif
4507         return 0;
4508 }
4509
4510 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4511 {
4512         /* adjust parameters according to the volume size */
4513         if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4514                 if (f2fs_block_unit_discard(sbi))
4515                         SM_I(sbi)->dcc_info->discard_granularity =
4516                                                 MIN_DISCARD_GRANULARITY;
4517                 if (!f2fs_lfs_mode(sbi))
4518                         SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4519                                                 BIT(F2FS_IPU_HONOR_OPU_WRITE);
4520         }
4521
4522         sbi->readdir_ra = true;
4523 }
4524
4525 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4526 {
4527         struct f2fs_sb_info *sbi;
4528         struct f2fs_super_block *raw_super;
4529         struct inode *root;
4530         int err;
4531         bool skip_recovery = false, need_fsck = false;
4532         char *options = NULL;
4533         int recovery, i, valid_super_block;
4534         struct curseg_info *seg_i;
4535         int retry_cnt = 1;
4536 #ifdef CONFIG_QUOTA
4537         bool quota_enabled = false;
4538 #endif
4539
4540 try_onemore:
4541         err = -EINVAL;
4542         raw_super = NULL;
4543         valid_super_block = -1;
4544         recovery = 0;
4545
4546         /* allocate memory for f2fs-specific super block info */
4547         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4548         if (!sbi)
4549                 return -ENOMEM;
4550
4551         sbi->sb = sb;
4552
4553         /* initialize locks within allocated memory */
4554         init_f2fs_rwsem(&sbi->gc_lock);
4555         mutex_init(&sbi->writepages);
4556         init_f2fs_rwsem(&sbi->cp_global_sem);
4557         init_f2fs_rwsem(&sbi->node_write);
4558         init_f2fs_rwsem(&sbi->node_change);
4559         spin_lock_init(&sbi->stat_lock);
4560         init_f2fs_rwsem(&sbi->cp_rwsem);
4561         init_f2fs_rwsem(&sbi->quota_sem);
4562         init_waitqueue_head(&sbi->cp_wait);
4563         spin_lock_init(&sbi->error_lock);
4564
4565         for (i = 0; i < NR_INODE_TYPE; i++) {
4566                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4567                 spin_lock_init(&sbi->inode_lock[i]);
4568         }
4569         mutex_init(&sbi->flush_lock);
4570
4571         /* set a block size */
4572         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4573                 f2fs_err(sbi, "unable to set blocksize");
4574                 goto free_sbi;
4575         }
4576
4577         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4578                                                                 &recovery);
4579         if (err)
4580                 goto free_sbi;
4581
4582         sb->s_fs_info = sbi;
4583         sbi->raw_super = raw_super;
4584
4585         INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
4586         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4587         memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
4588
4589         /* precompute checksum seed for metadata */
4590         if (f2fs_sb_has_inode_chksum(sbi))
4591                 sbi->s_chksum_seed = f2fs_chksum(~0, raw_super->uuid,
4592                                                  sizeof(raw_super->uuid));
4593
4594         default_options(sbi, false);
4595         /* parse mount options */
4596         options = kstrdup((const char *)data, GFP_KERNEL);
4597         if (data && !options) {
4598                 err = -ENOMEM;
4599                 goto free_sb_buf;
4600         }
4601
4602         err = parse_options(sbi, options, false);
4603         if (err)
4604                 goto free_options;
4605
4606         err = f2fs_default_check(sbi);
4607         if (err)
4608                 goto free_options;
4609
4610         sb->s_maxbytes = max_file_blocks(NULL) <<
4611                                 le32_to_cpu(raw_super->log_blocksize);
4612         sb->s_max_links = F2FS_LINK_MAX;
4613
4614         err = f2fs_setup_casefold(sbi);
4615         if (err)
4616                 goto free_options;
4617
4618 #ifdef CONFIG_QUOTA
4619         sb->dq_op = &f2fs_quota_operations;
4620         sb->s_qcop = &f2fs_quotactl_ops;
4621         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4622
4623         if (f2fs_sb_has_quota_ino(sbi)) {
4624                 for (i = 0; i < MAXQUOTAS; i++) {
4625                         if (f2fs_qf_ino(sbi->sb, i))
4626                                 sbi->nquota_files++;
4627                 }
4628         }
4629 #endif
4630
4631         sb->s_op = &f2fs_sops;
4632 #ifdef CONFIG_FS_ENCRYPTION
4633         sb->s_cop = &f2fs_cryptops;
4634 #endif
4635 #ifdef CONFIG_FS_VERITY
4636         sb->s_vop = &f2fs_verityops;
4637 #endif
4638         sb->s_xattr = f2fs_xattr_handlers;
4639         sb->s_export_op = &f2fs_export_ops;
4640         sb->s_magic = F2FS_SUPER_MAGIC;
4641         sb->s_time_gran = 1;
4642         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4643                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4644         if (test_opt(sbi, INLINECRYPT))
4645                 sb->s_flags |= SB_INLINECRYPT;
4646
4647         if (test_opt(sbi, LAZYTIME))
4648                 sb->s_flags |= SB_LAZYTIME;
4649         else
4650                 sb->s_flags &= ~SB_LAZYTIME;
4651
4652         super_set_uuid(sb, (void *) raw_super->uuid, sizeof(raw_super->uuid));
4653         super_set_sysfs_name_bdev(sb);
4654         sb->s_iflags |= SB_I_CGROUPWB;
4655
4656         /* init f2fs-specific super block info */
4657         sbi->valid_super_block = valid_super_block;
4658
4659         /* disallow all the data/node/meta page writes */
4660         set_sbi_flag(sbi, SBI_POR_DOING);
4661
4662         err = f2fs_init_write_merge_io(sbi);
4663         if (err)
4664                 goto free_bio_info;
4665
4666         init_sb_info(sbi);
4667
4668         err = f2fs_init_iostat(sbi);
4669         if (err)
4670                 goto free_bio_info;
4671
4672         err = init_percpu_info(sbi);
4673         if (err)
4674                 goto free_iostat;
4675
4676         /* init per sbi slab cache */
4677         err = f2fs_init_xattr_caches(sbi);
4678         if (err)
4679                 goto free_percpu;
4680         err = f2fs_init_page_array_cache(sbi);
4681         if (err)
4682                 goto free_xattr_cache;
4683
4684         /* get an inode for meta space */
4685         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4686         if (IS_ERR(sbi->meta_inode)) {
4687                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4688                 err = PTR_ERR(sbi->meta_inode);
4689                 goto free_page_array_cache;
4690         }
4691
4692         err = f2fs_get_valid_checkpoint(sbi);
4693         if (err) {
4694                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4695                 goto free_meta_inode;
4696         }
4697
4698         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4699                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4700         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4701                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4702                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4703         }
4704
4705         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4706                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4707
4708         /* Initialize device list */
4709         err = f2fs_scan_devices(sbi);
4710         if (err) {
4711                 f2fs_err(sbi, "Failed to find devices");
4712                 goto free_devices;
4713         }
4714
4715         err = f2fs_init_post_read_wq(sbi);
4716         if (err) {
4717                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4718                 goto free_devices;
4719         }
4720
4721         sbi->total_valid_node_count =
4722                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4723         percpu_counter_set(&sbi->total_valid_inode_count,
4724                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4725         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4726         sbi->total_valid_block_count =
4727                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4728         sbi->last_valid_block_count = sbi->total_valid_block_count;
4729         sbi->reserved_blocks = 0;
4730         sbi->current_reserved_blocks = 0;
4731         limit_reserve_root(sbi);
4732         adjust_unusable_cap_perc(sbi);
4733
4734         f2fs_init_extent_cache_info(sbi);
4735
4736         f2fs_init_ino_entry_info(sbi);
4737
4738         f2fs_init_fsync_node_info(sbi);
4739
4740         /* setup checkpoint request control and start checkpoint issue thread */
4741         f2fs_init_ckpt_req_control(sbi);
4742         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4743                         test_opt(sbi, MERGE_CHECKPOINT)) {
4744                 err = f2fs_start_ckpt_thread(sbi);
4745                 if (err) {
4746                         f2fs_err(sbi,
4747                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4748                             err);
4749                         goto stop_ckpt_thread;
4750                 }
4751         }
4752
4753         /* setup f2fs internal modules */
4754         err = f2fs_build_segment_manager(sbi);
4755         if (err) {
4756                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4757                          err);
4758                 goto free_sm;
4759         }
4760         err = f2fs_build_node_manager(sbi);
4761         if (err) {
4762                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4763                          err);
4764                 goto free_nm;
4765         }
4766
4767         /* For write statistics */
4768         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4769
4770         /* get segno of first zoned block device */
4771         sbi->first_seq_zone_segno = get_first_seq_zone_segno(sbi);
4772
4773         /* Read accumulated write IO statistics if exists */
4774         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4775         if (__exist_node_summaries(sbi))
4776                 sbi->kbytes_written =
4777                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4778
4779         f2fs_build_gc_manager(sbi);
4780
4781         err = f2fs_build_stats(sbi);
4782         if (err)
4783                 goto free_nm;
4784
4785         /* get an inode for node space */
4786         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4787         if (IS_ERR(sbi->node_inode)) {
4788                 f2fs_err(sbi, "Failed to read node inode");
4789                 err = PTR_ERR(sbi->node_inode);
4790                 goto free_stats;
4791         }
4792
4793         /* read root inode and dentry */
4794         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4795         if (IS_ERR(root)) {
4796                 f2fs_err(sbi, "Failed to read root inode");
4797                 err = PTR_ERR(root);
4798                 goto free_node_inode;
4799         }
4800         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4801                         !root->i_size || !root->i_nlink) {
4802                 iput(root);
4803                 err = -EINVAL;
4804                 goto free_node_inode;
4805         }
4806
4807         generic_set_sb_d_ops(sb);
4808         sb->s_root = d_make_root(root); /* allocate root dentry */
4809         if (!sb->s_root) {
4810                 err = -ENOMEM;
4811                 goto free_node_inode;
4812         }
4813
4814         err = f2fs_init_compress_inode(sbi);
4815         if (err)
4816                 goto free_root_inode;
4817
4818         err = f2fs_register_sysfs(sbi);
4819         if (err)
4820                 goto free_compress_inode;
4821
4822         sbi->umount_lock_holder = current;
4823 #ifdef CONFIG_QUOTA
4824         /* Enable quota usage during mount */
4825         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4826                 err = f2fs_enable_quotas(sb);
4827                 if (err)
4828                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4829         }
4830
4831         quota_enabled = f2fs_recover_quota_begin(sbi);
4832 #endif
4833         /* if there are any orphan inodes, free them */
4834         err = f2fs_recover_orphan_inodes(sbi);
4835         if (err)
4836                 goto free_meta;
4837
4838         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG))) {
4839                 skip_recovery = true;
4840                 goto reset_checkpoint;
4841         }
4842
4843         /* recover fsynced data */
4844         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4845                         !test_opt(sbi, NORECOVERY)) {
4846                 /*
4847                  * mount should be failed, when device has readonly mode, and
4848                  * previous checkpoint was not done by clean system shutdown.
4849                  */
4850                 if (f2fs_hw_is_readonly(sbi)) {
4851                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4852                                 err = f2fs_recover_fsync_data(sbi, true);
4853                                 if (err > 0) {
4854                                         err = -EROFS;
4855                                         f2fs_err(sbi, "Need to recover fsync data, but "
4856                                                 "write access unavailable, please try "
4857                                                 "mount w/ disable_roll_forward or norecovery");
4858                                 }
4859                                 if (err < 0)
4860                                         goto free_meta;
4861                         }
4862                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4863                         goto reset_checkpoint;
4864                 }
4865
4866                 if (need_fsck)
4867                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4868
4869                 if (skip_recovery)
4870                         goto reset_checkpoint;
4871
4872                 err = f2fs_recover_fsync_data(sbi, false);
4873                 if (err < 0) {
4874                         if (err != -ENOMEM)
4875                                 skip_recovery = true;
4876                         need_fsck = true;
4877                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4878                                  err);
4879                         goto free_meta;
4880                 }
4881         } else {
4882                 err = f2fs_recover_fsync_data(sbi, true);
4883
4884                 if (!f2fs_readonly(sb) && err > 0) {
4885                         err = -EINVAL;
4886                         f2fs_err(sbi, "Need to recover fsync data");
4887                         goto free_meta;
4888                 }
4889         }
4890
4891 reset_checkpoint:
4892 #ifdef CONFIG_QUOTA
4893         f2fs_recover_quota_end(sbi, quota_enabled);
4894 #endif
4895         /*
4896          * If the f2fs is not readonly and fsync data recovery succeeds,
4897          * write pointer consistency of cursegs and other zones are already
4898          * checked and fixed during recovery. However, if recovery fails,
4899          * write pointers are left untouched, and retry-mount should check
4900          * them here.
4901          */
4902         if (skip_recovery)
4903                 err = f2fs_check_and_fix_write_pointer(sbi);
4904         if (err)
4905                 goto free_meta;
4906
4907         /* f2fs_recover_fsync_data() cleared this already */
4908         clear_sbi_flag(sbi, SBI_POR_DOING);
4909
4910         err = f2fs_init_inmem_curseg(sbi);
4911         if (err)
4912                 goto sync_free_meta;
4913
4914         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4915                 err = f2fs_disable_checkpoint(sbi);
4916                 if (err)
4917                         goto sync_free_meta;
4918         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4919                 f2fs_enable_checkpoint(sbi);
4920         }
4921
4922         /*
4923          * If filesystem is not mounted as read-only then
4924          * do start the gc_thread.
4925          */
4926         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4927                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4928                 /* After POR, we can run background GC thread.*/
4929                 err = f2fs_start_gc_thread(sbi);
4930                 if (err)
4931                         goto sync_free_meta;
4932         }
4933         kvfree(options);
4934
4935         /* recover broken superblock */
4936         if (recovery) {
4937                 err = f2fs_commit_super(sbi, true);
4938                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4939                           sbi->valid_super_block ? 1 : 2, err);
4940         }
4941
4942         f2fs_join_shrinker(sbi);
4943
4944         f2fs_tuning_parameters(sbi);
4945
4946         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4947                     cur_cp_version(F2FS_CKPT(sbi)));
4948         f2fs_update_time(sbi, CP_TIME);
4949         f2fs_update_time(sbi, REQ_TIME);
4950         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4951
4952         sbi->umount_lock_holder = NULL;
4953         return 0;
4954
4955 sync_free_meta:
4956         /* safe to flush all the data */
4957         sync_filesystem(sbi->sb);
4958         retry_cnt = 0;
4959
4960 free_meta:
4961 #ifdef CONFIG_QUOTA
4962         f2fs_truncate_quota_inode_pages(sb);
4963         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4964                 f2fs_quota_off_umount(sbi->sb);
4965 #endif
4966         /*
4967          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4968          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4969          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4970          * falls into an infinite loop in f2fs_sync_meta_pages().
4971          */
4972         truncate_inode_pages_final(META_MAPPING(sbi));
4973         /* evict some inodes being cached by GC */
4974         evict_inodes(sb);
4975         f2fs_unregister_sysfs(sbi);
4976 free_compress_inode:
4977         f2fs_destroy_compress_inode(sbi);
4978 free_root_inode:
4979         dput(sb->s_root);
4980         sb->s_root = NULL;
4981 free_node_inode:
4982         f2fs_release_ino_entry(sbi, true);
4983         truncate_inode_pages_final(NODE_MAPPING(sbi));
4984         iput(sbi->node_inode);
4985         sbi->node_inode = NULL;
4986 free_stats:
4987         f2fs_destroy_stats(sbi);
4988 free_nm:
4989         /* stop discard thread before destroying node manager */
4990         f2fs_stop_discard_thread(sbi);
4991         f2fs_destroy_node_manager(sbi);
4992 free_sm:
4993         f2fs_destroy_segment_manager(sbi);
4994 stop_ckpt_thread:
4995         f2fs_stop_ckpt_thread(sbi);
4996         /* flush s_error_work before sbi destroy */
4997         flush_work(&sbi->s_error_work);
4998         f2fs_destroy_post_read_wq(sbi);
4999 free_devices:
5000         destroy_device_list(sbi);
5001         kvfree(sbi->ckpt);
5002 free_meta_inode:
5003         make_bad_inode(sbi->meta_inode);
5004         iput(sbi->meta_inode);
5005         sbi->meta_inode = NULL;
5006 free_page_array_cache:
5007         f2fs_destroy_page_array_cache(sbi);
5008 free_xattr_cache:
5009         f2fs_destroy_xattr_caches(sbi);
5010 free_percpu:
5011         destroy_percpu_info(sbi);
5012 free_iostat:
5013         f2fs_destroy_iostat(sbi);
5014 free_bio_info:
5015         for (i = 0; i < NR_PAGE_TYPE; i++)
5016                 kvfree(sbi->write_io[i]);
5017
5018 #if IS_ENABLED(CONFIG_UNICODE)
5019         utf8_unload(sb->s_encoding);
5020         sb->s_encoding = NULL;
5021 #endif
5022 free_options:
5023 #ifdef CONFIG_QUOTA
5024         for (i = 0; i < MAXQUOTAS; i++)
5025                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
5026 #endif
5027         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
5028         kvfree(options);
5029 free_sb_buf:
5030         kfree(raw_super);
5031 free_sbi:
5032         kfree(sbi);
5033         sb->s_fs_info = NULL;
5034
5035         /* give only one another chance */
5036         if (retry_cnt > 0 && skip_recovery) {
5037                 retry_cnt--;
5038                 shrink_dcache_sb(sb);
5039                 goto try_onemore;
5040         }
5041         return err;
5042 }
5043
5044 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
5045                         const char *dev_name, void *data)
5046 {
5047         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
5048 }
5049
5050 static void kill_f2fs_super(struct super_block *sb)
5051 {
5052         struct f2fs_sb_info *sbi = F2FS_SB(sb);
5053
5054         if (sb->s_root) {
5055                 sbi->umount_lock_holder = current;
5056
5057                 set_sbi_flag(sbi, SBI_IS_CLOSE);
5058                 f2fs_stop_gc_thread(sbi);
5059                 f2fs_stop_discard_thread(sbi);
5060
5061 #ifdef CONFIG_F2FS_FS_COMPRESSION
5062                 /*
5063                  * latter evict_inode() can bypass checking and invalidating
5064                  * compress inode cache.
5065                  */
5066                 if (test_opt(sbi, COMPRESS_CACHE))
5067                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
5068 #endif
5069
5070                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
5071                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
5072                         struct cp_control cpc = {
5073                                 .reason = CP_UMOUNT,
5074                         };
5075                         stat_inc_cp_call_count(sbi, TOTAL_CALL);
5076                         f2fs_write_checkpoint(sbi, &cpc);
5077                 }
5078
5079                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
5080                         sb->s_flags &= ~SB_RDONLY;
5081         }
5082         kill_block_super(sb);
5083         /* Release block devices last, after fscrypt_destroy_keyring(). */
5084         if (sbi) {
5085                 destroy_device_list(sbi);
5086                 kfree(sbi);
5087                 sb->s_fs_info = NULL;
5088         }
5089 }
5090
5091 static struct file_system_type f2fs_fs_type = {
5092         .owner          = THIS_MODULE,
5093         .name           = "f2fs",
5094         .mount          = f2fs_mount,
5095         .kill_sb        = kill_f2fs_super,
5096         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
5097 };
5098 MODULE_ALIAS_FS("f2fs");
5099
5100 static int __init init_inodecache(void)
5101 {
5102         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
5103                         sizeof(struct f2fs_inode_info), 0,
5104                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
5105         return f2fs_inode_cachep ? 0 : -ENOMEM;
5106 }
5107
5108 static void destroy_inodecache(void)
5109 {
5110         /*
5111          * Make sure all delayed rcu free inodes are flushed before we
5112          * destroy cache.
5113          */
5114         rcu_barrier();
5115         kmem_cache_destroy(f2fs_inode_cachep);
5116 }
5117
5118 static int __init init_f2fs_fs(void)
5119 {
5120         int err;
5121
5122         err = init_inodecache();
5123         if (err)
5124                 goto fail;
5125         err = f2fs_create_node_manager_caches();
5126         if (err)
5127                 goto free_inodecache;
5128         err = f2fs_create_segment_manager_caches();
5129         if (err)
5130                 goto free_node_manager_caches;
5131         err = f2fs_create_checkpoint_caches();
5132         if (err)
5133                 goto free_segment_manager_caches;
5134         err = f2fs_create_recovery_cache();
5135         if (err)
5136                 goto free_checkpoint_caches;
5137         err = f2fs_create_extent_cache();
5138         if (err)
5139                 goto free_recovery_cache;
5140         err = f2fs_create_garbage_collection_cache();
5141         if (err)
5142                 goto free_extent_cache;
5143         err = f2fs_init_sysfs();
5144         if (err)
5145                 goto free_garbage_collection_cache;
5146         err = f2fs_init_shrinker();
5147         if (err)
5148                 goto free_sysfs;
5149         f2fs_create_root_stats();
5150         err = f2fs_init_post_read_processing();
5151         if (err)
5152                 goto free_root_stats;
5153         err = f2fs_init_iostat_processing();
5154         if (err)
5155                 goto free_post_read;
5156         err = f2fs_init_bio_entry_cache();
5157         if (err)
5158                 goto free_iostat;
5159         err = f2fs_init_bioset();
5160         if (err)
5161                 goto free_bio_entry_cache;
5162         err = f2fs_init_compress_mempool();
5163         if (err)
5164                 goto free_bioset;
5165         err = f2fs_init_compress_cache();
5166         if (err)
5167                 goto free_compress_mempool;
5168         err = f2fs_create_casefold_cache();
5169         if (err)
5170                 goto free_compress_cache;
5171         err = register_filesystem(&f2fs_fs_type);
5172         if (err)
5173                 goto free_casefold_cache;
5174         return 0;
5175 free_casefold_cache:
5176         f2fs_destroy_casefold_cache();
5177 free_compress_cache:
5178         f2fs_destroy_compress_cache();
5179 free_compress_mempool:
5180         f2fs_destroy_compress_mempool();
5181 free_bioset:
5182         f2fs_destroy_bioset();
5183 free_bio_entry_cache:
5184         f2fs_destroy_bio_entry_cache();
5185 free_iostat:
5186         f2fs_destroy_iostat_processing();
5187 free_post_read:
5188         f2fs_destroy_post_read_processing();
5189 free_root_stats:
5190         f2fs_destroy_root_stats();
5191         f2fs_exit_shrinker();
5192 free_sysfs:
5193         f2fs_exit_sysfs();
5194 free_garbage_collection_cache:
5195         f2fs_destroy_garbage_collection_cache();
5196 free_extent_cache:
5197         f2fs_destroy_extent_cache();
5198 free_recovery_cache:
5199         f2fs_destroy_recovery_cache();
5200 free_checkpoint_caches:
5201         f2fs_destroy_checkpoint_caches();
5202 free_segment_manager_caches:
5203         f2fs_destroy_segment_manager_caches();
5204 free_node_manager_caches:
5205         f2fs_destroy_node_manager_caches();
5206 free_inodecache:
5207         destroy_inodecache();
5208 fail:
5209         return err;
5210 }
5211
5212 static void __exit exit_f2fs_fs(void)
5213 {
5214         unregister_filesystem(&f2fs_fs_type);
5215         f2fs_destroy_casefold_cache();
5216         f2fs_destroy_compress_cache();
5217         f2fs_destroy_compress_mempool();
5218         f2fs_destroy_bioset();
5219         f2fs_destroy_bio_entry_cache();
5220         f2fs_destroy_iostat_processing();
5221         f2fs_destroy_post_read_processing();
5222         f2fs_destroy_root_stats();
5223         f2fs_exit_shrinker();
5224         f2fs_exit_sysfs();
5225         f2fs_destroy_garbage_collection_cache();
5226         f2fs_destroy_extent_cache();
5227         f2fs_destroy_recovery_cache();
5228         f2fs_destroy_checkpoint_caches();
5229         f2fs_destroy_segment_manager_caches();
5230         f2fs_destroy_node_manager_caches();
5231         destroy_inodecache();
5232 }
5233
5234 module_init(init_f2fs_fs)
5235 module_exit(exit_f2fs_fs)
5236
5237 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
5238 MODULE_DESCRIPTION("Flash Friendly File System");
5239 MODULE_LICENSE("GPL");