fs/f2fs/super.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/super.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/fs.h>
  11 #include <linux/statfs.h>
  12 #include <linux/buffer_head.h>
  13 #include <linux/backing-dev.h>
  14 #include <linux/kthread.h>
  15 #include <linux/parser.h>
  16 #include <linux/mount.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/random.h>
  20 #include <linux/exportfs.h>
  21 #include <linux/blkdev.h>
  22 #include <linux/quotaops.h>
  23 #include <linux/f2fs_fs.h>
  24 #include <linux/sysfs.h>
  25 #include <linux/quota.h>
  26 #include <linux/unicode.h>
  27 #include <linux/part_stat.h>
  28 #include <linux/zstd.h>
  29 #include <linux/lz4.h>
  30
  31 #include "f2fs.h"
  32 #include "node.h"
  33 #include "segment.h"
  34 #include "xattr.h"
  35 #include "gc.h"
  36 #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_NID]       = "alloc nid",
  51         [FAULT_ORPHAN]          = "orphan",
  52         [FAULT_BLOCK]           = "no more block",
  53         [FAULT_DIR_DEPTH]       = "too big dir depth",
  54         [FAULT_EVICT_INODE]     = "evict_inode fail",
  55         [FAULT_TRUNCATE]        = "truncate fail",
  56         [FAULT_READ_IO]         = "read IO error",
  57         [FAULT_CHECKPOINT]      = "checkpoint error",
  58         [FAULT_DISCARD]         = "discard error",
  59         [FAULT_WRITE_IO]        = "write IO error",
  60         [FAULT_SLAB_ALLOC]      = "slab alloc",
  61         [FAULT_DQUOT_INIT]      = "dquot initialize",
  62 };
  63
  64 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  65                                                         unsigned int type)
  66 {
  67         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  68
  69         if (rate) {
  70                 atomic_set(&ffi->inject_ops, 0);
  71                 ffi->inject_rate = rate;
  72         }
  73
  74         if (type)
  75                 ffi->inject_type = type;
  76
  77         if (!rate && !type)
  78                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  79 }
  80 #endif
  81
  82 /* f2fs-wide shrinker description */
  83 static struct shrinker f2fs_shrinker_info = {
  84         .scan_objects = f2fs_shrink_scan,
  85         .count_objects = f2fs_shrink_count,
  86         .seeks = DEFAULT_SEEKS,
  87 };
  88
  89 enum {
  90         Opt_gc_background,
  91         Opt_disable_roll_forward,
  92         Opt_norecovery,
  93         Opt_discard,
  94         Opt_nodiscard,
  95         Opt_noheap,
  96         Opt_heap,
  97         Opt_user_xattr,
  98         Opt_nouser_xattr,
  99         Opt_acl,
 100         Opt_noacl,
 101         Opt_active_logs,
 102         Opt_disable_ext_identify,
 103         Opt_inline_xattr,
 104         Opt_noinline_xattr,
 105         Opt_inline_xattr_size,
 106         Opt_inline_data,
 107         Opt_inline_dentry,
 108         Opt_noinline_dentry,
 109         Opt_flush_merge,
 110         Opt_noflush_merge,
 111         Opt_nobarrier,
 112         Opt_fastboot,
 113         Opt_extent_cache,
 114         Opt_noextent_cache,
 115         Opt_noinline_data,
 116         Opt_data_flush,
 117         Opt_reserve_root,
 118         Opt_resgid,
 119         Opt_resuid,
 120         Opt_mode,
 121         Opt_io_size_bits,
 122         Opt_fault_injection,
 123         Opt_fault_type,
 124         Opt_lazytime,
 125         Opt_nolazytime,
 126         Opt_quota,
 127         Opt_noquota,
 128         Opt_usrquota,
 129         Opt_grpquota,
 130         Opt_prjquota,
 131         Opt_usrjquota,
 132         Opt_grpjquota,
 133         Opt_prjjquota,
 134         Opt_offusrjquota,
 135         Opt_offgrpjquota,
 136         Opt_offprjjquota,
 137         Opt_jqfmt_vfsold,
 138         Opt_jqfmt_vfsv0,
 139         Opt_jqfmt_vfsv1,
 140         Opt_whint,
 141         Opt_alloc,
 142         Opt_fsync,
 143         Opt_test_dummy_encryption,
 144         Opt_inlinecrypt,
 145         Opt_checkpoint_disable,
 146         Opt_checkpoint_disable_cap,
 147         Opt_checkpoint_disable_cap_perc,
 148         Opt_checkpoint_enable,
 149         Opt_checkpoint_merge,
 150         Opt_nocheckpoint_merge,
 151         Opt_compress_algorithm,
 152         Opt_compress_log_size,
 153         Opt_compress_extension,
 154         Opt_nocompress_extension,
 155         Opt_compress_chksum,
 156         Opt_compress_mode,
 157         Opt_compress_cache,
 158         Opt_atgc,
 159         Opt_gc_merge,
 160         Opt_nogc_merge,
 161         Opt_discard_unit,
 162         Opt_err,
 163 };
 164
 165 static match_table_t f2fs_tokens = {
 166         {Opt_gc_background, "background_gc=%s"},
 167         {Opt_disable_roll_forward, "disable_roll_forward"},
 168         {Opt_norecovery, "norecovery"},
 169         {Opt_discard, "discard"},
 170         {Opt_nodiscard, "nodiscard"},
 171         {Opt_noheap, "no_heap"},
 172         {Opt_heap, "heap"},
 173         {Opt_user_xattr, "user_xattr"},
 174         {Opt_nouser_xattr, "nouser_xattr"},
 175         {Opt_acl, "acl"},
 176         {Opt_noacl, "noacl"},
 177         {Opt_active_logs, "active_logs=%u"},
 178         {Opt_disable_ext_identify, "disable_ext_identify"},
 179         {Opt_inline_xattr, "inline_xattr"},
 180         {Opt_noinline_xattr, "noinline_xattr"},
 181         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 182         {Opt_inline_data, "inline_data"},
 183         {Opt_inline_dentry, "inline_dentry"},
 184         {Opt_noinline_dentry, "noinline_dentry"},
 185         {Opt_flush_merge, "flush_merge"},
 186         {Opt_noflush_merge, "noflush_merge"},
 187         {Opt_nobarrier, "nobarrier"},
 188         {Opt_fastboot, "fastboot"},
 189         {Opt_extent_cache, "extent_cache"},
 190         {Opt_noextent_cache, "noextent_cache"},
 191         {Opt_noinline_data, "noinline_data"},
 192         {Opt_data_flush, "data_flush"},
 193         {Opt_reserve_root, "reserve_root=%u"},
 194         {Opt_resgid, "resgid=%u"},
 195         {Opt_resuid, "resuid=%u"},
 196         {Opt_mode, "mode=%s"},
 197         {Opt_io_size_bits, "io_bits=%u"},
 198         {Opt_fault_injection, "fault_injection=%u"},
 199         {Opt_fault_type, "fault_type=%u"},
 200         {Opt_lazytime, "lazytime"},
 201         {Opt_nolazytime, "nolazytime"},
 202         {Opt_quota, "quota"},
 203         {Opt_noquota, "noquota"},
 204         {Opt_usrquota, "usrquota"},
 205         {Opt_grpquota, "grpquota"},
 206         {Opt_prjquota, "prjquota"},
 207         {Opt_usrjquota, "usrjquota=%s"},
 208         {Opt_grpjquota, "grpjquota=%s"},
 209         {Opt_prjjquota, "prjjquota=%s"},
 210         {Opt_offusrjquota, "usrjquota="},
 211         {Opt_offgrpjquota, "grpjquota="},
 212         {Opt_offprjjquota, "prjjquota="},
 213         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 214         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 215         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 216         {Opt_whint, "whint_mode=%s"},
 217         {Opt_alloc, "alloc_mode=%s"},
 218         {Opt_fsync, "fsync_mode=%s"},
 219         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 220         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 221         {Opt_inlinecrypt, "inlinecrypt"},
 222         {Opt_checkpoint_disable, "checkpoint=disable"},
 223         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 224         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 225         {Opt_checkpoint_enable, "checkpoint=enable"},
 226         {Opt_checkpoint_merge, "checkpoint_merge"},
 227         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 228         {Opt_compress_algorithm, "compress_algorithm=%s"},
 229         {Opt_compress_log_size, "compress_log_size=%u"},
 230         {Opt_compress_extension, "compress_extension=%s"},
 231         {Opt_nocompress_extension, "nocompress_extension=%s"},
 232         {Opt_compress_chksum, "compress_chksum"},
 233         {Opt_compress_mode, "compress_mode=%s"},
 234         {Opt_compress_cache, "compress_cache"},
 235         {Opt_atgc, "atgc"},
 236         {Opt_gc_merge, "gc_merge"},
 237         {Opt_nogc_merge, "nogc_merge"},
 238         {Opt_discard_unit, "discard_unit=%s"},
 239         {Opt_err, NULL},
 240 };
 241
 242 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 243 {
 244         struct va_format vaf;
 245         va_list args;
 246         int level;
 247
 248         va_start(args, fmt);
 249
 250         level = printk_get_level(fmt);
 251         vaf.fmt = printk_skip_level(fmt);
 252         vaf.va = &args;
 253         printk("%c%cF2FS-fs (%s): %pV\n",
 254                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 255
 256         va_end(args);
 257 }
 258
 259 #ifdef CONFIG_UNICODE
 260 static const struct f2fs_sb_encodings {
 261         __u16 magic;
 262         char *name;
 263         char *version;
 264 } f2fs_sb_encoding_map[] = {
 265         {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
 266 };
 267
 268 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
 269                                  const struct f2fs_sb_encodings **encoding,
 270                                  __u16 *flags)
 271 {
 272         __u16 magic = le16_to_cpu(sb->s_encoding);
 273         int i;
 274
 275         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 276                 if (magic == f2fs_sb_encoding_map[i].magic)
 277                         break;
 278
 279         if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
 280                 return -EINVAL;
 281
 282         *encoding = &f2fs_sb_encoding_map[i];
 283         *flags = le16_to_cpu(sb->s_encoding_flags);
 284
 285         return 0;
 286 }
 287
 288 struct kmem_cache *f2fs_cf_name_slab;
 289 static int __init f2fs_create_casefold_cache(void)
 290 {
 291         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 292                                                         F2FS_NAME_LEN);
 293         if (!f2fs_cf_name_slab)
 294                 return -ENOMEM;
 295         return 0;
 296 }
 297
 298 static void f2fs_destroy_casefold_cache(void)
 299 {
 300         kmem_cache_destroy(f2fs_cf_name_slab);
 301 }
 302 #else
 303 static int __init f2fs_create_casefold_cache(void) { return 0; }
 304 static void f2fs_destroy_casefold_cache(void) { }
 305 #endif
 306
 307 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 308 {
 309         block_t limit = min((sbi->user_block_count << 1) / 1000,
 310                         sbi->user_block_count - sbi->reserved_blocks);
 311
 312         /* limit is 0.2% */
 313         if (test_opt(sbi, RESERVE_ROOT) &&
 314                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 315                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 316                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 317                           F2FS_OPTION(sbi).root_reserved_blocks);
 318         }
 319         if (!test_opt(sbi, RESERVE_ROOT) &&
 320                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 321                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 322                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 323                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 324                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 325                           from_kuid_munged(&init_user_ns,
 326                                            F2FS_OPTION(sbi).s_resuid),
 327                           from_kgid_munged(&init_user_ns,
 328                                            F2FS_OPTION(sbi).s_resgid));
 329 }
 330
 331 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 332 {
 333         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 334                 return;
 335
 336         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 337                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 338         else
 339                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 340                                         F2FS_OPTION(sbi).unusable_cap_perc;
 341
 342         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 343                         F2FS_OPTION(sbi).unusable_cap,
 344                         F2FS_OPTION(sbi).unusable_cap_perc);
 345 }
 346
 347 static void init_once(void *foo)
 348 {
 349         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 350
 351         inode_init_once(&fi->vfs_inode);
 352 }
 353
 354 #ifdef CONFIG_QUOTA
 355 static const char * const quotatypes[] = INITQFNAMES;
 356 #define QTYPE2NAME(t) (quotatypes[t])
 357 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 358                                                         substring_t *args)
 359 {
 360         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 361         char *qname;
 362         int ret = -EINVAL;
 363
 364         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 365                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 366                 return -EINVAL;
 367         }
 368         if (f2fs_sb_has_quota_ino(sbi)) {
 369                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 370                 return 0;
 371         }
 372
 373         qname = match_strdup(args);
 374         if (!qname) {
 375                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 376                 return -ENOMEM;
 377         }
 378         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 379                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 380                         ret = 0;
 381                 else
 382                         f2fs_err(sbi, "%s quota file already specified",
 383                                  QTYPE2NAME(qtype));
 384                 goto errout;
 385         }
 386         if (strchr(qname, '/')) {
 387                 f2fs_err(sbi, "quotafile must be on filesystem root");
 388                 goto errout;
 389         }
 390         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 391         set_opt(sbi, QUOTA);
 392         return 0;
 393 errout:
 394         kfree(qname);
 395         return ret;
 396 }
 397
 398 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 399 {
 400         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 401
 402         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 403                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 404                 return -EINVAL;
 405         }
 406         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 407         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 408         return 0;
 409 }
 410
 411 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 412 {
 413         /*
 414          * We do the test below only for project quotas. 'usrquota' and
 415          * 'grpquota' mount options are allowed even without quota feature
 416          * to support legacy quotas in quota files.
 417          */
 418         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 419                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 420                 return -1;
 421         }
 422         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 423                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 424                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 425                 if (test_opt(sbi, USRQUOTA) &&
 426                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 427                         clear_opt(sbi, USRQUOTA);
 428
 429                 if (test_opt(sbi, GRPQUOTA) &&
 430                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 431                         clear_opt(sbi, GRPQUOTA);
 432
 433                 if (test_opt(sbi, PRJQUOTA) &&
 434                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 435                         clear_opt(sbi, PRJQUOTA);
 436
 437                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 438                                 test_opt(sbi, PRJQUOTA)) {
 439                         f2fs_err(sbi, "old and new quota format mixing");
 440                         return -1;
 441                 }
 442
 443                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 444                         f2fs_err(sbi, "journaled quota format not specified");
 445                         return -1;
 446                 }
 447         }
 448
 449         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 450                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 451                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 452         }
 453         return 0;
 454 }
 455 #endif
 456
 457 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 458                                           const char *opt,
 459                                           const substring_t *arg,
 460                                           bool is_remount)
 461 {
 462         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 463 #ifdef CONFIG_FS_ENCRYPTION
 464         int err;
 465
 466         if (!f2fs_sb_has_encrypt(sbi)) {
 467                 f2fs_err(sbi, "Encrypt feature is off");
 468                 return -EINVAL;
 469         }
 470
 471         /*
 472          * This mount option is just for testing, and it's not worthwhile to
 473          * implement the extra complexity (e.g. RCU protection) that would be
 474          * needed to allow it to be set or changed during remount.  We do allow
 475          * it to be specified during remount, but only if there is no change.
 476          */
 477         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 478                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 479                 return -EINVAL;
 480         }
 481         err = fscrypt_set_test_dummy_encryption(
 482                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 483         if (err) {
 484                 if (err == -EEXIST)
 485                         f2fs_warn(sbi,
 486                                   "Can't change test_dummy_encryption on remount");
 487                 else if (err == -EINVAL)
 488                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 489                                   opt);
 490                 else
 491                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 492                                   opt, err);
 493                 return -EINVAL;
 494         }
 495         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 496 #else
 497         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 498 #endif
 499         return 0;
 500 }
 501
 502 #ifdef CONFIG_F2FS_FS_COMPRESSION
 503 /*
 504  * 1. The same extension name cannot not appear in both compress and non-compress extension
 505  * at the same time.
 506  * 2. If the compress extension specifies all files, the types specified by the non-compress
 507  * extension will be treated as special cases and will not be compressed.
 508  * 3. Don't allow the non-compress extension specifies all files.
 509  */
 510 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 511 {
 512         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 513         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 514         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 515
 516         ext = F2FS_OPTION(sbi).extensions;
 517         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 518         noext = F2FS_OPTION(sbi).noextensions;
 519         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 520
 521         if (!noext_cnt)
 522                 return 0;
 523
 524         for (no_index = 0; no_index < noext_cnt; no_index++) {
 525                 if (!strcasecmp("*", noext[no_index])) {
 526                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 527                         return -EINVAL;
 528                 }
 529                 for (index = 0; index < ext_cnt; index++) {
 530                         if (!strcasecmp(ext[index], noext[no_index])) {
 531                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 532                                                 ext[index]);
 533                                 return -EINVAL;
 534                         }
 535                 }
 536         }
 537         return 0;
 538 }
 539
 540 #ifdef CONFIG_F2FS_FS_LZ4
 541 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 542 {
 543 #ifdef CONFIG_F2FS_FS_LZ4HC
 544         unsigned int level;
 545 #endif
 546
 547         if (strlen(str) == 3) {
 548                 F2FS_OPTION(sbi).compress_level = 0;
 549                 return 0;
 550         }
 551
 552 #ifdef CONFIG_F2FS_FS_LZ4HC
 553         str += 3;
 554
 555         if (str[0] != ':') {
 556                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 557                 return -EINVAL;
 558         }
 559         if (kstrtouint(str + 1, 10, &level))
 560                 return -EINVAL;
 561
 562         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 563                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 564                 return -EINVAL;
 565         }
 566
 567         F2FS_OPTION(sbi).compress_level = level;
 568         return 0;
 569 #else
 570         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 571         return -EINVAL;
 572 #endif
 573 }
 574 #endif
 575
 576 #ifdef CONFIG_F2FS_FS_ZSTD
 577 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 578 {
 579         unsigned int level;
 580         int len = 4;
 581
 582         if (strlen(str) == len) {
 583                 F2FS_OPTION(sbi).compress_level = 0;
 584                 return 0;
 585         }
 586
 587         str += len;
 588
 589         if (str[0] != ':') {
 590                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 591                 return -EINVAL;
 592         }
 593         if (kstrtouint(str + 1, 10, &level))
 594                 return -EINVAL;
 595
 596         if (!level || level > ZSTD_maxCLevel()) {
 597                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 598                 return -EINVAL;
 599         }
 600
 601         F2FS_OPTION(sbi).compress_level = level;
 602         return 0;
 603 }
 604 #endif
 605 #endif
 606
 607 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 608 {
 609         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 610         substring_t args[MAX_OPT_ARGS];
 611 #ifdef CONFIG_F2FS_FS_COMPRESSION
 612         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 613         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 614         int ext_cnt, noext_cnt;
 615 #endif
 616         char *p, *name;
 617         int arg = 0;
 618         kuid_t uid;
 619         kgid_t gid;
 620         int ret;
 621
 622         if (!options)
 623                 goto default_check;
 624
 625         while ((p = strsep(&options, ",")) != NULL) {
 626                 int token;
 627
 628                 if (!*p)
 629                         continue;
 630                 /*
 631                  * Initialize args struct so we know whether arg was
 632                  * found; some options take optional arguments.
 633                  */
 634                 args[0].to = args[0].from = NULL;
 635                 token = match_token(p, f2fs_tokens, args);
 636
 637                 switch (token) {
 638                 case Opt_gc_background:
 639                         name = match_strdup(&args[0]);
 640
 641                         if (!name)
 642                                 return -ENOMEM;
 643                         if (!strcmp(name, "on")) {
 644                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 645                         } else if (!strcmp(name, "off")) {
 646                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 647                         } else if (!strcmp(name, "sync")) {
 648                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 649                         } else {
 650                                 kfree(name);
 651                                 return -EINVAL;
 652                         }
 653                         kfree(name);
 654                         break;
 655                 case Opt_disable_roll_forward:
 656                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 657                         break;
 658                 case Opt_norecovery:
 659                         /* this option mounts f2fs with ro */
 660                         set_opt(sbi, NORECOVERY);
 661                         if (!f2fs_readonly(sb))
 662                                 return -EINVAL;
 663                         break;
 664                 case Opt_discard:
 665                         if (!f2fs_hw_support_discard(sbi)) {
 666                                 f2fs_warn(sbi, "device does not support discard");
 667                                 break;
 668                         }
 669                         set_opt(sbi, DISCARD);
 670                         break;
 671                 case Opt_nodiscard:
 672                         if (f2fs_hw_should_discard(sbi)) {
 673                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 674                                 return -EINVAL;
 675                         }
 676                         clear_opt(sbi, DISCARD);
 677                         break;
 678                 case Opt_noheap:
 679                         set_opt(sbi, NOHEAP);
 680                         break;
 681                 case Opt_heap:
 682                         clear_opt(sbi, NOHEAP);
 683                         break;
 684 #ifdef CONFIG_F2FS_FS_XATTR
 685                 case Opt_user_xattr:
 686                         set_opt(sbi, XATTR_USER);
 687                         break;
 688                 case Opt_nouser_xattr:
 689                         clear_opt(sbi, XATTR_USER);
 690                         break;
 691                 case Opt_inline_xattr:
 692                         set_opt(sbi, INLINE_XATTR);
 693                         break;
 694                 case Opt_noinline_xattr:
 695                         clear_opt(sbi, INLINE_XATTR);
 696                         break;
 697                 case Opt_inline_xattr_size:
 698                         if (args->from && match_int(args, &arg))
 699                                 return -EINVAL;
 700                         set_opt(sbi, INLINE_XATTR_SIZE);
 701                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 702                         break;
 703 #else
 704                 case Opt_user_xattr:
 705                         f2fs_info(sbi, "user_xattr options not supported");
 706                         break;
 707                 case Opt_nouser_xattr:
 708                         f2fs_info(sbi, "nouser_xattr options not supported");
 709                         break;
 710                 case Opt_inline_xattr:
 711                         f2fs_info(sbi, "inline_xattr options not supported");
 712                         break;
 713                 case Opt_noinline_xattr:
 714                         f2fs_info(sbi, "noinline_xattr options not supported");
 715                         break;
 716 #endif
 717 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 718                 case Opt_acl:
 719                         set_opt(sbi, POSIX_ACL);
 720                         break;
 721                 case Opt_noacl:
 722                         clear_opt(sbi, POSIX_ACL);
 723                         break;
 724 #else
 725                 case Opt_acl:
 726                         f2fs_info(sbi, "acl options not supported");
 727                         break;
 728                 case Opt_noacl:
 729                         f2fs_info(sbi, "noacl options not supported");
 730                         break;
 731 #endif
 732                 case Opt_active_logs:
 733                         if (args->from && match_int(args, &arg))
 734                                 return -EINVAL;
 735                         if (arg != 2 && arg != 4 &&
 736                                 arg != NR_CURSEG_PERSIST_TYPE)
 737                                 return -EINVAL;
 738                         F2FS_OPTION(sbi).active_logs = arg;
 739                         break;
 740                 case Opt_disable_ext_identify:
 741                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 742                         break;
 743                 case Opt_inline_data:
 744                         set_opt(sbi, INLINE_DATA);
 745                         break;
 746                 case Opt_inline_dentry:
 747                         set_opt(sbi, INLINE_DENTRY);
 748                         break;
 749                 case Opt_noinline_dentry:
 750                         clear_opt(sbi, INLINE_DENTRY);
 751                         break;
 752                 case Opt_flush_merge:
 753                         set_opt(sbi, FLUSH_MERGE);
 754                         break;
 755                 case Opt_noflush_merge:
 756                         clear_opt(sbi, FLUSH_MERGE);
 757                         break;
 758                 case Opt_nobarrier:
 759                         set_opt(sbi, NOBARRIER);
 760                         break;
 761                 case Opt_fastboot:
 762                         set_opt(sbi, FASTBOOT);
 763                         break;
 764                 case Opt_extent_cache:
 765                         set_opt(sbi, EXTENT_CACHE);
 766                         break;
 767                 case Opt_noextent_cache:
 768                         clear_opt(sbi, EXTENT_CACHE);
 769                         break;
 770                 case Opt_noinline_data:
 771                         clear_opt(sbi, INLINE_DATA);
 772                         break;
 773                 case Opt_data_flush:
 774                         set_opt(sbi, DATA_FLUSH);
 775                         break;
 776                 case Opt_reserve_root:
 777                         if (args->from && match_int(args, &arg))
 778                                 return -EINVAL;
 779                         if (test_opt(sbi, RESERVE_ROOT)) {
 780                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 781                                           F2FS_OPTION(sbi).root_reserved_blocks);
 782                         } else {
 783                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 784                                 set_opt(sbi, RESERVE_ROOT);
 785                         }
 786                         break;
 787                 case Opt_resuid:
 788                         if (args->from && match_int(args, &arg))
 789                                 return -EINVAL;
 790                         uid = make_kuid(current_user_ns(), arg);
 791                         if (!uid_valid(uid)) {
 792                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 793                                 return -EINVAL;
 794                         }
 795                         F2FS_OPTION(sbi).s_resuid = uid;
 796                         break;
 797                 case Opt_resgid:
 798                         if (args->from && match_int(args, &arg))
 799                                 return -EINVAL;
 800                         gid = make_kgid(current_user_ns(), arg);
 801                         if (!gid_valid(gid)) {
 802                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 803                                 return -EINVAL;
 804                         }
 805                         F2FS_OPTION(sbi).s_resgid = gid;
 806                         break;
 807                 case Opt_mode:
 808                         name = match_strdup(&args[0]);
 809
 810                         if (!name)
 811                                 return -ENOMEM;
 812                         if (!strcmp(name, "adaptive")) {
 813                                 if (f2fs_sb_has_blkzoned(sbi)) {
 814                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 815                                         kfree(name);
 816                                         return -EINVAL;
 817                                 }
 818                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 819                         } else if (!strcmp(name, "lfs")) {
 820                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 821                         } else if (!strcmp(name, "fragment:segment")) {
 822                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 823                         } else if (!strcmp(name, "fragment:block")) {
 824                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 825                         } else {
 826                                 kfree(name);
 827                                 return -EINVAL;
 828                         }
 829                         kfree(name);
 830                         break;
 831                 case Opt_io_size_bits:
 832                         if (args->from && match_int(args, &arg))
 833                                 return -EINVAL;
 834                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 835                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 836                                           1 << arg, BIO_MAX_VECS);
 837                                 return -EINVAL;
 838                         }
 839                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 840                         break;
 841 #ifdef CONFIG_F2FS_FAULT_INJECTION
 842                 case Opt_fault_injection:
 843                         if (args->from && match_int(args, &arg))
 844                                 return -EINVAL;
 845                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 846                         set_opt(sbi, FAULT_INJECTION);
 847                         break;
 848
 849                 case Opt_fault_type:
 850                         if (args->from && match_int(args, &arg))
 851                                 return -EINVAL;
 852                         f2fs_build_fault_attr(sbi, 0, arg);
 853                         set_opt(sbi, FAULT_INJECTION);
 854                         break;
 855 #else
 856                 case Opt_fault_injection:
 857                         f2fs_info(sbi, "fault_injection options not supported");
 858                         break;
 859
 860                 case Opt_fault_type:
 861                         f2fs_info(sbi, "fault_type options not supported");
 862                         break;
 863 #endif
 864                 case Opt_lazytime:
 865                         sb->s_flags |= SB_LAZYTIME;
 866                         break;
 867                 case Opt_nolazytime:
 868                         sb->s_flags &= ~SB_LAZYTIME;
 869                         break;
 870 #ifdef CONFIG_QUOTA
 871                 case Opt_quota:
 872                 case Opt_usrquota:
 873                         set_opt(sbi, USRQUOTA);
 874                         break;
 875                 case Opt_grpquota:
 876                         set_opt(sbi, GRPQUOTA);
 877                         break;
 878                 case Opt_prjquota:
 879                         set_opt(sbi, PRJQUOTA);
 880                         break;
 881                 case Opt_usrjquota:
 882                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 883                         if (ret)
 884                                 return ret;
 885                         break;
 886                 case Opt_grpjquota:
 887                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 888                         if (ret)
 889                                 return ret;
 890                         break;
 891                 case Opt_prjjquota:
 892                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 893                         if (ret)
 894                                 return ret;
 895                         break;
 896                 case Opt_offusrjquota:
 897                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 898                         if (ret)
 899                                 return ret;
 900                         break;
 901                 case Opt_offgrpjquota:
 902                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 903                         if (ret)
 904                                 return ret;
 905                         break;
 906                 case Opt_offprjjquota:
 907                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 908                         if (ret)
 909                                 return ret;
 910                         break;
 911                 case Opt_jqfmt_vfsold:
 912                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 913                         break;
 914                 case Opt_jqfmt_vfsv0:
 915                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 916                         break;
 917                 case Opt_jqfmt_vfsv1:
 918                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 919                         break;
 920                 case Opt_noquota:
 921                         clear_opt(sbi, QUOTA);
 922                         clear_opt(sbi, USRQUOTA);
 923                         clear_opt(sbi, GRPQUOTA);
 924                         clear_opt(sbi, PRJQUOTA);
 925                         break;
 926 #else
 927                 case Opt_quota:
 928                 case Opt_usrquota:
 929                 case Opt_grpquota:
 930                 case Opt_prjquota:
 931                 case Opt_usrjquota:
 932                 case Opt_grpjquota:
 933                 case Opt_prjjquota:
 934                 case Opt_offusrjquota:
 935                 case Opt_offgrpjquota:
 936                 case Opt_offprjjquota:
 937                 case Opt_jqfmt_vfsold:
 938                 case Opt_jqfmt_vfsv0:
 939                 case Opt_jqfmt_vfsv1:
 940                 case Opt_noquota:
 941                         f2fs_info(sbi, "quota operations not supported");
 942                         break;
 943 #endif
 944                 case Opt_whint:
 945                         name = match_strdup(&args[0]);
 946                         if (!name)
 947                                 return -ENOMEM;
 948                         if (!strcmp(name, "user-based")) {
 949                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 950                         } else if (!strcmp(name, "off")) {
 951                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 952                         } else if (!strcmp(name, "fs-based")) {
 953                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 954                         } else {
 955                                 kfree(name);
 956                                 return -EINVAL;
 957                         }
 958                         kfree(name);
 959                         break;
 960                 case Opt_alloc:
 961                         name = match_strdup(&args[0]);
 962                         if (!name)
 963                                 return -ENOMEM;
 964
 965                         if (!strcmp(name, "default")) {
 966                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 967                         } else if (!strcmp(name, "reuse")) {
 968                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 969                         } else {
 970                                 kfree(name);
 971                                 return -EINVAL;
 972                         }
 973                         kfree(name);
 974                         break;
 975                 case Opt_fsync:
 976                         name = match_strdup(&args[0]);
 977                         if (!name)
 978                                 return -ENOMEM;
 979                         if (!strcmp(name, "posix")) {
 980                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 981                         } else if (!strcmp(name, "strict")) {
 982                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 983                         } else if (!strcmp(name, "nobarrier")) {
 984                                 F2FS_OPTION(sbi).fsync_mode =
 985                                                         FSYNC_MODE_NOBARRIER;
 986                         } else {
 987                                 kfree(name);
 988                                 return -EINVAL;
 989                         }
 990                         kfree(name);
 991                         break;
 992                 case Opt_test_dummy_encryption:
 993                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 994                                                              is_remount);
 995                         if (ret)
 996                                 return ret;
 997                         break;
 998                 case Opt_inlinecrypt:
 999 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1000                         sb->s_flags |= SB_INLINECRYPT;
1001 #else
1002                         f2fs_info(sbi, "inline encryption not supported");
1003 #endif
1004                         break;
1005                 case Opt_checkpoint_disable_cap_perc:
1006                         if (args->from && match_int(args, &arg))
1007                                 return -EINVAL;
1008                         if (arg < 0 || arg > 100)
1009                                 return -EINVAL;
1010                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1011                         set_opt(sbi, DISABLE_CHECKPOINT);
1012                         break;
1013                 case Opt_checkpoint_disable_cap:
1014                         if (args->from && match_int(args, &arg))
1015                                 return -EINVAL;
1016                         F2FS_OPTION(sbi).unusable_cap = arg;
1017                         set_opt(sbi, DISABLE_CHECKPOINT);
1018                         break;
1019                 case Opt_checkpoint_disable:
1020                         set_opt(sbi, DISABLE_CHECKPOINT);
1021                         break;
1022                 case Opt_checkpoint_enable:
1023                         clear_opt(sbi, DISABLE_CHECKPOINT);
1024                         break;
1025                 case Opt_checkpoint_merge:
1026                         set_opt(sbi, MERGE_CHECKPOINT);
1027                         break;
1028                 case Opt_nocheckpoint_merge:
1029                         clear_opt(sbi, MERGE_CHECKPOINT);
1030                         break;
1031 #ifdef CONFIG_F2FS_FS_COMPRESSION
1032                 case Opt_compress_algorithm:
1033                         if (!f2fs_sb_has_compression(sbi)) {
1034                                 f2fs_info(sbi, "Image doesn't support compression");
1035                                 break;
1036                         }
1037                         name = match_strdup(&args[0]);
1038                         if (!name)
1039                                 return -ENOMEM;
1040                         if (!strcmp(name, "lzo")) {
1041 #ifdef CONFIG_F2FS_FS_LZO
1042                                 F2FS_OPTION(sbi).compress_level = 0;
1043                                 F2FS_OPTION(sbi).compress_algorithm =
1044                                                                 COMPRESS_LZO;
1045 #else
1046                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1047 #endif
1048                         } else if (!strncmp(name, "lz4", 3)) {
1049 #ifdef CONFIG_F2FS_FS_LZ4
1050                                 ret = f2fs_set_lz4hc_level(sbi, name);
1051                                 if (ret) {
1052                                         kfree(name);
1053                                         return -EINVAL;
1054                                 }
1055                                 F2FS_OPTION(sbi).compress_algorithm =
1056                                                                 COMPRESS_LZ4;
1057 #else
1058                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1059 #endif
1060                         } else if (!strncmp(name, "zstd", 4)) {
1061 #ifdef CONFIG_F2FS_FS_ZSTD
1062                                 ret = f2fs_set_zstd_level(sbi, name);
1063                                 if (ret) {
1064                                         kfree(name);
1065                                         return -EINVAL;
1066                                 }
1067                                 F2FS_OPTION(sbi).compress_algorithm =
1068                                                                 COMPRESS_ZSTD;
1069 #else
1070                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1071 #endif
1072                         } else if (!strcmp(name, "lzo-rle")) {
1073 #ifdef CONFIG_F2FS_FS_LZORLE
1074                                 F2FS_OPTION(sbi).compress_level = 0;
1075                                 F2FS_OPTION(sbi).compress_algorithm =
1076                                                                 COMPRESS_LZORLE;
1077 #else
1078                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1079 #endif
1080                         } else {
1081                                 kfree(name);
1082                                 return -EINVAL;
1083                         }
1084                         kfree(name);
1085                         break;
1086                 case Opt_compress_log_size:
1087                         if (!f2fs_sb_has_compression(sbi)) {
1088                                 f2fs_info(sbi, "Image doesn't support compression");
1089                                 break;
1090                         }
1091                         if (args->from && match_int(args, &arg))
1092                                 return -EINVAL;
1093                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1094                                 arg > MAX_COMPRESS_LOG_SIZE) {
1095                                 f2fs_err(sbi,
1096                                         "Compress cluster log size is out of range");
1097                                 return -EINVAL;
1098                         }
1099                         F2FS_OPTION(sbi).compress_log_size = arg;
1100                         break;
1101                 case Opt_compress_extension:
1102                         if (!f2fs_sb_has_compression(sbi)) {
1103                                 f2fs_info(sbi, "Image doesn't support compression");
1104                                 break;
1105                         }
1106                         name = match_strdup(&args[0]);
1107                         if (!name)
1108                                 return -ENOMEM;
1109
1110                         ext = F2FS_OPTION(sbi).extensions;
1111                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1112
1113                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1114                                 ext_cnt >= COMPRESS_EXT_NUM) {
1115                                 f2fs_err(sbi,
1116                                         "invalid extension length/number");
1117                                 kfree(name);
1118                                 return -EINVAL;
1119                         }
1120
1121                         strcpy(ext[ext_cnt], name);
1122                         F2FS_OPTION(sbi).compress_ext_cnt++;
1123                         kfree(name);
1124                         break;
1125                 case Opt_nocompress_extension:
1126                         if (!f2fs_sb_has_compression(sbi)) {
1127                                 f2fs_info(sbi, "Image doesn't support compression");
1128                                 break;
1129                         }
1130                         name = match_strdup(&args[0]);
1131                         if (!name)
1132                                 return -ENOMEM;
1133
1134                         noext = F2FS_OPTION(sbi).noextensions;
1135                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1136
1137                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1138                                 noext_cnt >= COMPRESS_EXT_NUM) {
1139                                 f2fs_err(sbi,
1140                                         "invalid extension length/number");
1141                                 kfree(name);
1142                                 return -EINVAL;
1143                         }
1144
1145                         strcpy(noext[noext_cnt], name);
1146                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1147                         kfree(name);
1148                         break;
1149                 case Opt_compress_chksum:
1150                         F2FS_OPTION(sbi).compress_chksum = true;
1151                         break;
1152                 case Opt_compress_mode:
1153                         name = match_strdup(&args[0]);
1154                         if (!name)
1155                                 return -ENOMEM;
1156                         if (!strcmp(name, "fs")) {
1157                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1158                         } else if (!strcmp(name, "user")) {
1159                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1160                         } else {
1161                                 kfree(name);
1162                                 return -EINVAL;
1163                         }
1164                         kfree(name);
1165                         break;
1166                 case Opt_compress_cache:
1167                         set_opt(sbi, COMPRESS_CACHE);
1168                         break;
1169 #else
1170                 case Opt_compress_algorithm:
1171                 case Opt_compress_log_size:
1172                 case Opt_compress_extension:
1173                 case Opt_nocompress_extension:
1174                 case Opt_compress_chksum:
1175                 case Opt_compress_mode:
1176                 case Opt_compress_cache:
1177                         f2fs_info(sbi, "compression options not supported");
1178                         break;
1179 #endif
1180                 case Opt_atgc:
1181                         set_opt(sbi, ATGC);
1182                         break;
1183                 case Opt_gc_merge:
1184                         set_opt(sbi, GC_MERGE);
1185                         break;
1186                 case Opt_nogc_merge:
1187                         clear_opt(sbi, GC_MERGE);
1188                         break;
1189                 case Opt_discard_unit:
1190                         name = match_strdup(&args[0]);
1191                         if (!name)
1192                                 return -ENOMEM;
1193                         if (!strcmp(name, "block")) {
1194                                 F2FS_OPTION(sbi).discard_unit =
1195                                                 DISCARD_UNIT_BLOCK;
1196                         } else if (!strcmp(name, "segment")) {
1197                                 F2FS_OPTION(sbi).discard_unit =
1198                                                 DISCARD_UNIT_SEGMENT;
1199                         } else if (!strcmp(name, "section")) {
1200                                 F2FS_OPTION(sbi).discard_unit =
1201                                                 DISCARD_UNIT_SECTION;
1202                         } else {
1203                                 kfree(name);
1204                                 return -EINVAL;
1205                         }
1206                         kfree(name);
1207                         break;
1208                 default:
1209                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1210                                  p);
1211                         return -EINVAL;
1212                 }
1213         }
1214 default_check:
1215 #ifdef CONFIG_QUOTA
1216         if (f2fs_check_quota_options(sbi))
1217                 return -EINVAL;
1218 #else
1219         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1220                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1221                 return -EINVAL;
1222         }
1223         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1224                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1225                 return -EINVAL;
1226         }
1227 #endif
1228 #ifndef CONFIG_UNICODE
1229         if (f2fs_sb_has_casefold(sbi)) {
1230                 f2fs_err(sbi,
1231                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1232                 return -EINVAL;
1233         }
1234 #endif
1235         /*
1236          * The BLKZONED feature indicates that the drive was formatted with
1237          * zone alignment optimization. This is optional for host-aware
1238          * devices, but mandatory for host-managed zoned block devices.
1239          */
1240 #ifndef CONFIG_BLK_DEV_ZONED
1241         if (f2fs_sb_has_blkzoned(sbi)) {
1242                 f2fs_err(sbi, "Zoned block device support is not enabled");
1243                 return -EINVAL;
1244         }
1245 #endif
1246         if (f2fs_sb_has_blkzoned(sbi)) {
1247                 if (F2FS_OPTION(sbi).discard_unit !=
1248                                                 DISCARD_UNIT_SECTION) {
1249                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1250                         F2FS_OPTION(sbi).discard_unit =
1251                                         DISCARD_UNIT_SECTION;
1252                 }
1253         }
1254
1255 #ifdef CONFIG_F2FS_FS_COMPRESSION
1256         if (f2fs_test_compress_extension(sbi)) {
1257                 f2fs_err(sbi, "invalid compress or nocompress extension");
1258                 return -EINVAL;
1259         }
1260 #endif
1261
1262         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1263                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1264                          F2FS_IO_SIZE_KB(sbi));
1265                 return -EINVAL;
1266         }
1267
1268         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1269                 int min_size, max_size;
1270
1271                 if (!f2fs_sb_has_extra_attr(sbi) ||
1272                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1273                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1274                         return -EINVAL;
1275                 }
1276                 if (!test_opt(sbi, INLINE_XATTR)) {
1277                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1278                         return -EINVAL;
1279                 }
1280
1281                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1282                 max_size = MAX_INLINE_XATTR_SIZE;
1283
1284                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1285                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1286                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1287                                  min_size, max_size);
1288                         return -EINVAL;
1289                 }
1290         }
1291
1292         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1293                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1294                 return -EINVAL;
1295         }
1296
1297         /* Not pass down write hints if the number of active logs is lesser
1298          * than NR_CURSEG_PERSIST_TYPE.
1299          */
1300         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_PERSIST_TYPE)
1301                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1302
1303         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1304                 f2fs_err(sbi, "Allow to mount readonly mode only");
1305                 return -EROFS;
1306         }
1307         return 0;
1308 }
1309
1310 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1311 {
1312         struct f2fs_inode_info *fi;
1313
1314         fi = f2fs_kmem_cache_alloc(f2fs_inode_cachep,
1315                                 GFP_F2FS_ZERO, false, F2FS_SB(sb));
1316         if (!fi)
1317                 return NULL;
1318
1319         init_once((void *) fi);
1320
1321         /* Initialize f2fs-specific inode info */
1322         atomic_set(&fi->dirty_pages, 0);
1323         atomic_set(&fi->i_compr_blocks, 0);
1324         init_rwsem(&fi->i_sem);
1325         spin_lock_init(&fi->i_size_lock);
1326         INIT_LIST_HEAD(&fi->dirty_list);
1327         INIT_LIST_HEAD(&fi->gdirty_list);
1328         INIT_LIST_HEAD(&fi->inmem_ilist);
1329         INIT_LIST_HEAD(&fi->inmem_pages);
1330         mutex_init(&fi->inmem_lock);
1331         init_rwsem(&fi->i_gc_rwsem[READ]);
1332         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1333         init_rwsem(&fi->i_xattr_sem);
1334
1335         /* Will be used by directory only */
1336         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1337
1338         return &fi->vfs_inode;
1339 }
1340
1341 static int f2fs_drop_inode(struct inode *inode)
1342 {
1343         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1344         int ret;
1345
1346         /*
1347          * during filesystem shutdown, if checkpoint is disabled,
1348          * drop useless meta/node dirty pages.
1349          */
1350         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1351                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1352                         inode->i_ino == F2FS_META_INO(sbi)) {
1353                         trace_f2fs_drop_inode(inode, 1);
1354                         return 1;
1355                 }
1356         }
1357
1358         /*
1359          * This is to avoid a deadlock condition like below.
1360          * writeback_single_inode(inode)
1361          *  - f2fs_write_data_page
1362          *    - f2fs_gc -> iput -> evict
1363          *       - inode_wait_for_writeback(inode)
1364          */
1365         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1366                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1367                         /* to avoid evict_inode call simultaneously */
1368                         atomic_inc(&inode->i_count);
1369                         spin_unlock(&inode->i_lock);
1370
1371                         /* some remained atomic pages should discarded */
1372                         if (f2fs_is_atomic_file(inode))
1373                                 f2fs_drop_inmem_pages(inode);
1374
1375                         /* should remain fi->extent_tree for writepage */
1376                         f2fs_destroy_extent_node(inode);
1377
1378                         sb_start_intwrite(inode->i_sb);
1379                         f2fs_i_size_write(inode, 0);
1380
1381                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1382                                         inode, NULL, 0, DATA);
1383                         truncate_inode_pages_final(inode->i_mapping);
1384
1385                         if (F2FS_HAS_BLOCKS(inode))
1386                                 f2fs_truncate(inode);
1387
1388                         sb_end_intwrite(inode->i_sb);
1389
1390                         spin_lock(&inode->i_lock);
1391                         atomic_dec(&inode->i_count);
1392                 }
1393                 trace_f2fs_drop_inode(inode, 0);
1394                 return 0;
1395         }
1396         ret = generic_drop_inode(inode);
1397         if (!ret)
1398                 ret = fscrypt_drop_inode(inode);
1399         trace_f2fs_drop_inode(inode, ret);
1400         return ret;
1401 }
1402
1403 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1404 {
1405         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1406         int ret = 0;
1407
1408         spin_lock(&sbi->inode_lock[DIRTY_META]);
1409         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1410                 ret = 1;
1411         } else {
1412                 set_inode_flag(inode, FI_DIRTY_INODE);
1413                 stat_inc_dirty_inode(sbi, DIRTY_META);
1414         }
1415         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1416                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1417                                 &sbi->inode_list[DIRTY_META]);
1418                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1419         }
1420         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1421         return ret;
1422 }
1423
1424 void f2fs_inode_synced(struct inode *inode)
1425 {
1426         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1427
1428         spin_lock(&sbi->inode_lock[DIRTY_META]);
1429         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1430                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1431                 return;
1432         }
1433         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1434                 list_del_init(&F2FS_I(inode)->gdirty_list);
1435                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1436         }
1437         clear_inode_flag(inode, FI_DIRTY_INODE);
1438         clear_inode_flag(inode, FI_AUTO_RECOVER);
1439         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1440         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1441 }
1442
1443 /*
1444  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1445  *
1446  * We should call set_dirty_inode to write the dirty inode through write_inode.
1447  */
1448 static void f2fs_dirty_inode(struct inode *inode, int flags)
1449 {
1450         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1451
1452         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1453                         inode->i_ino == F2FS_META_INO(sbi))
1454                 return;
1455
1456         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1457                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1458
1459         f2fs_inode_dirtied(inode, false);
1460 }
1461
1462 static void f2fs_free_inode(struct inode *inode)
1463 {
1464         fscrypt_free_inode(inode);
1465         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1466 }
1467
1468 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1469 {
1470         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1471         percpu_counter_destroy(&sbi->total_valid_inode_count);
1472 }
1473
1474 static void destroy_device_list(struct f2fs_sb_info *sbi)
1475 {
1476         int i;
1477
1478         for (i = 0; i < sbi->s_ndevs; i++) {
1479                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1480 #ifdef CONFIG_BLK_DEV_ZONED
1481                 kvfree(FDEV(i).blkz_seq);
1482                 kfree(FDEV(i).zone_capacity_blocks);
1483 #endif
1484         }
1485         kvfree(sbi->devs);
1486 }
1487
1488 static void f2fs_put_super(struct super_block *sb)
1489 {
1490         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1491         int i;
1492         bool dropped;
1493
1494         /* unregister procfs/sysfs entries in advance to avoid race case */
1495         f2fs_unregister_sysfs(sbi);
1496
1497         f2fs_quota_off_umount(sb);
1498
1499         /* prevent remaining shrinker jobs */
1500         mutex_lock(&sbi->umount_mutex);
1501
1502         /*
1503          * flush all issued checkpoints and stop checkpoint issue thread.
1504          * after then, all checkpoints should be done by each process context.
1505          */
1506         f2fs_stop_ckpt_thread(sbi);
1507
1508         /*
1509          * We don't need to do checkpoint when superblock is clean.
1510          * But, the previous checkpoint was not done by umount, it needs to do
1511          * clean checkpoint again.
1512          */
1513         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1514                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1515                 struct cp_control cpc = {
1516                         .reason = CP_UMOUNT,
1517                 };
1518                 f2fs_write_checkpoint(sbi, &cpc);
1519         }
1520
1521         /* be sure to wait for any on-going discard commands */
1522         dropped = f2fs_issue_discard_timeout(sbi);
1523
1524         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1525                                         !sbi->discard_blks && !dropped) {
1526                 struct cp_control cpc = {
1527                         .reason = CP_UMOUNT | CP_TRIMMED,
1528                 };
1529                 f2fs_write_checkpoint(sbi, &cpc);
1530         }
1531
1532         /*
1533          * normally superblock is clean, so we need to release this.
1534          * In addition, EIO will skip do checkpoint, we need this as well.
1535          */
1536         f2fs_release_ino_entry(sbi, true);
1537
1538         f2fs_leave_shrinker(sbi);
1539         mutex_unlock(&sbi->umount_mutex);
1540
1541         /* our cp_error case, we can wait for any writeback page */
1542         f2fs_flush_merged_writes(sbi);
1543
1544         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1545
1546         f2fs_bug_on(sbi, sbi->fsync_node_num);
1547
1548         f2fs_destroy_compress_inode(sbi);
1549
1550         iput(sbi->node_inode);
1551         sbi->node_inode = NULL;
1552
1553         iput(sbi->meta_inode);
1554         sbi->meta_inode = NULL;
1555
1556         /*
1557          * iput() can update stat information, if f2fs_write_checkpoint()
1558          * above failed with error.
1559          */
1560         f2fs_destroy_stats(sbi);
1561
1562         /* destroy f2fs internal modules */
1563         f2fs_destroy_node_manager(sbi);
1564         f2fs_destroy_segment_manager(sbi);
1565
1566         f2fs_destroy_post_read_wq(sbi);
1567
1568         kvfree(sbi->ckpt);
1569
1570         sb->s_fs_info = NULL;
1571         if (sbi->s_chksum_driver)
1572                 crypto_free_shash(sbi->s_chksum_driver);
1573         kfree(sbi->raw_super);
1574
1575         destroy_device_list(sbi);
1576         f2fs_destroy_page_array_cache(sbi);
1577         f2fs_destroy_xattr_caches(sbi);
1578         mempool_destroy(sbi->write_io_dummy);
1579 #ifdef CONFIG_QUOTA
1580         for (i = 0; i < MAXQUOTAS; i++)
1581                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1582 #endif
1583         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1584         destroy_percpu_info(sbi);
1585         f2fs_destroy_iostat(sbi);
1586         for (i = 0; i < NR_PAGE_TYPE; i++)
1587                 kvfree(sbi->write_io[i]);
1588 #ifdef CONFIG_UNICODE
1589         utf8_unload(sb->s_encoding);
1590 #endif
1591         kfree(sbi);
1592 }
1593
1594 int f2fs_sync_fs(struct super_block *sb, int sync)
1595 {
1596         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1597         int err = 0;
1598
1599         if (unlikely(f2fs_cp_error(sbi)))
1600                 return 0;
1601         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1602                 return 0;
1603
1604         trace_f2fs_sync_fs(sb, sync);
1605
1606         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1607                 return -EAGAIN;
1608
1609         if (sync)
1610                 err = f2fs_issue_checkpoint(sbi);
1611
1612         return err;
1613 }
1614
1615 static int f2fs_freeze(struct super_block *sb)
1616 {
1617         if (f2fs_readonly(sb))
1618                 return 0;
1619
1620         /* IO error happened before */
1621         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1622                 return -EIO;
1623
1624         /* must be clean, since sync_filesystem() was already called */
1625         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1626                 return -EINVAL;
1627
1628         /* ensure no checkpoint required */
1629         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1630                 return -EINVAL;
1631         return 0;
1632 }
1633
1634 static int f2fs_unfreeze(struct super_block *sb)
1635 {
1636         return 0;
1637 }
1638
1639 #ifdef CONFIG_QUOTA
1640 static int f2fs_statfs_project(struct super_block *sb,
1641                                 kprojid_t projid, struct kstatfs *buf)
1642 {
1643         struct kqid qid;
1644         struct dquot *dquot;
1645         u64 limit;
1646         u64 curblock;
1647
1648         qid = make_kqid_projid(projid);
1649         dquot = dqget(sb, qid);
1650         if (IS_ERR(dquot))
1651                 return PTR_ERR(dquot);
1652         spin_lock(&dquot->dq_dqb_lock);
1653
1654         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1655                                         dquot->dq_dqb.dqb_bhardlimit);
1656         if (limit)
1657                 limit >>= sb->s_blocksize_bits;
1658
1659         if (limit && buf->f_blocks > limit) {
1660                 curblock = (dquot->dq_dqb.dqb_curspace +
1661                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1662                 buf->f_blocks = limit;
1663                 buf->f_bfree = buf->f_bavail =
1664                         (buf->f_blocks > curblock) ?
1665                          (buf->f_blocks - curblock) : 0;
1666         }
1667
1668         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1669                                         dquot->dq_dqb.dqb_ihardlimit);
1670
1671         if (limit && buf->f_files > limit) {
1672                 buf->f_files = limit;
1673                 buf->f_ffree =
1674                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1675                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1676         }
1677
1678         spin_unlock(&dquot->dq_dqb_lock);
1679         dqput(dquot);
1680         return 0;
1681 }
1682 #endif
1683
1684 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1685 {
1686         struct super_block *sb = dentry->d_sb;
1687         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1688         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1689         block_t total_count, user_block_count, start_count;
1690         u64 avail_node_count;
1691
1692         total_count = le64_to_cpu(sbi->raw_super->block_count);
1693         user_block_count = sbi->user_block_count;
1694         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1695         buf->f_type = F2FS_SUPER_MAGIC;
1696         buf->f_bsize = sbi->blocksize;
1697
1698         buf->f_blocks = total_count - start_count;
1699         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1700                                                 sbi->current_reserved_blocks;
1701
1702         spin_lock(&sbi->stat_lock);
1703         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1704                 buf->f_bfree = 0;
1705         else
1706                 buf->f_bfree -= sbi->unusable_block_count;
1707         spin_unlock(&sbi->stat_lock);
1708
1709         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1710                 buf->f_bavail = buf->f_bfree -
1711                                 F2FS_OPTION(sbi).root_reserved_blocks;
1712         else
1713                 buf->f_bavail = 0;
1714
1715         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1716
1717         if (avail_node_count > user_block_count) {
1718                 buf->f_files = user_block_count;
1719                 buf->f_ffree = buf->f_bavail;
1720         } else {
1721                 buf->f_files = avail_node_count;
1722                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1723                                         buf->f_bavail);
1724         }
1725
1726         buf->f_namelen = F2FS_NAME_LEN;
1727         buf->f_fsid    = u64_to_fsid(id);
1728
1729 #ifdef CONFIG_QUOTA
1730         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1731                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1732                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1733         }
1734 #endif
1735         return 0;
1736 }
1737
1738 static inline void f2fs_show_quota_options(struct seq_file *seq,
1739                                            struct super_block *sb)
1740 {
1741 #ifdef CONFIG_QUOTA
1742         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1743
1744         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1745                 char *fmtname = "";
1746
1747                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1748                 case QFMT_VFS_OLD:
1749                         fmtname = "vfsold";
1750                         break;
1751                 case QFMT_VFS_V0:
1752                         fmtname = "vfsv0";
1753                         break;
1754                 case QFMT_VFS_V1:
1755                         fmtname = "vfsv1";
1756                         break;
1757                 }
1758                 seq_printf(seq, ",jqfmt=%s", fmtname);
1759         }
1760
1761         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1762                 seq_show_option(seq, "usrjquota",
1763                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1764
1765         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1766                 seq_show_option(seq, "grpjquota",
1767                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1768
1769         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1770                 seq_show_option(seq, "prjjquota",
1771                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1772 #endif
1773 }
1774
1775 #ifdef CONFIG_F2FS_FS_COMPRESSION
1776 static inline void f2fs_show_compress_options(struct seq_file *seq,
1777                                                         struct super_block *sb)
1778 {
1779         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1780         char *algtype = "";
1781         int i;
1782
1783         if (!f2fs_sb_has_compression(sbi))
1784                 return;
1785
1786         switch (F2FS_OPTION(sbi).compress_algorithm) {
1787         case COMPRESS_LZO:
1788                 algtype = "lzo";
1789                 break;
1790         case COMPRESS_LZ4:
1791                 algtype = "lz4";
1792                 break;
1793         case COMPRESS_ZSTD:
1794                 algtype = "zstd";
1795                 break;
1796         case COMPRESS_LZORLE:
1797                 algtype = "lzo-rle";
1798                 break;
1799         }
1800         seq_printf(seq, ",compress_algorithm=%s", algtype);
1801
1802         if (F2FS_OPTION(sbi).compress_level)
1803                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1804
1805         seq_printf(seq, ",compress_log_size=%u",
1806                         F2FS_OPTION(sbi).compress_log_size);
1807
1808         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1809                 seq_printf(seq, ",compress_extension=%s",
1810                         F2FS_OPTION(sbi).extensions[i]);
1811         }
1812
1813         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1814                 seq_printf(seq, ",nocompress_extension=%s",
1815                         F2FS_OPTION(sbi).noextensions[i]);
1816         }
1817
1818         if (F2FS_OPTION(sbi).compress_chksum)
1819                 seq_puts(seq, ",compress_chksum");
1820
1821         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1822                 seq_printf(seq, ",compress_mode=%s", "fs");
1823         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1824                 seq_printf(seq, ",compress_mode=%s", "user");
1825
1826         if (test_opt(sbi, COMPRESS_CACHE))
1827                 seq_puts(seq, ",compress_cache");
1828 }
1829 #endif
1830
1831 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1832 {
1833         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1834
1835         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1836                 seq_printf(seq, ",background_gc=%s", "sync");
1837         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1838                 seq_printf(seq, ",background_gc=%s", "on");
1839         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1840                 seq_printf(seq, ",background_gc=%s", "off");
1841
1842         if (test_opt(sbi, GC_MERGE))
1843                 seq_puts(seq, ",gc_merge");
1844
1845         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1846                 seq_puts(seq, ",disable_roll_forward");
1847         if (test_opt(sbi, NORECOVERY))
1848                 seq_puts(seq, ",norecovery");
1849         if (test_opt(sbi, DISCARD))
1850                 seq_puts(seq, ",discard");
1851         else
1852                 seq_puts(seq, ",nodiscard");
1853         if (test_opt(sbi, NOHEAP))
1854                 seq_puts(seq, ",no_heap");
1855         else
1856                 seq_puts(seq, ",heap");
1857 #ifdef CONFIG_F2FS_FS_XATTR
1858         if (test_opt(sbi, XATTR_USER))
1859                 seq_puts(seq, ",user_xattr");
1860         else
1861                 seq_puts(seq, ",nouser_xattr");
1862         if (test_opt(sbi, INLINE_XATTR))
1863                 seq_puts(seq, ",inline_xattr");
1864         else
1865                 seq_puts(seq, ",noinline_xattr");
1866         if (test_opt(sbi, INLINE_XATTR_SIZE))
1867                 seq_printf(seq, ",inline_xattr_size=%u",
1868                                         F2FS_OPTION(sbi).inline_xattr_size);
1869 #endif
1870 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1871         if (test_opt(sbi, POSIX_ACL))
1872                 seq_puts(seq, ",acl");
1873         else
1874                 seq_puts(seq, ",noacl");
1875 #endif
1876         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1877                 seq_puts(seq, ",disable_ext_identify");
1878         if (test_opt(sbi, INLINE_DATA))
1879                 seq_puts(seq, ",inline_data");
1880         else
1881                 seq_puts(seq, ",noinline_data");
1882         if (test_opt(sbi, INLINE_DENTRY))
1883                 seq_puts(seq, ",inline_dentry");
1884         else
1885                 seq_puts(seq, ",noinline_dentry");
1886         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1887                 seq_puts(seq, ",flush_merge");
1888         if (test_opt(sbi, NOBARRIER))
1889                 seq_puts(seq, ",nobarrier");
1890         if (test_opt(sbi, FASTBOOT))
1891                 seq_puts(seq, ",fastboot");
1892         if (test_opt(sbi, EXTENT_CACHE))
1893                 seq_puts(seq, ",extent_cache");
1894         else
1895                 seq_puts(seq, ",noextent_cache");
1896         if (test_opt(sbi, DATA_FLUSH))
1897                 seq_puts(seq, ",data_flush");
1898
1899         seq_puts(seq, ",mode=");
1900         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1901                 seq_puts(seq, "adaptive");
1902         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1903                 seq_puts(seq, "lfs");
1904         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
1905                 seq_puts(seq, "fragment:segment");
1906         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
1907                 seq_puts(seq, "fragment:block");
1908         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1909         if (test_opt(sbi, RESERVE_ROOT))
1910                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1911                                 F2FS_OPTION(sbi).root_reserved_blocks,
1912                                 from_kuid_munged(&init_user_ns,
1913                                         F2FS_OPTION(sbi).s_resuid),
1914                                 from_kgid_munged(&init_user_ns,
1915                                         F2FS_OPTION(sbi).s_resgid));
1916         if (F2FS_IO_SIZE_BITS(sbi))
1917                 seq_printf(seq, ",io_bits=%u",
1918                                 F2FS_OPTION(sbi).write_io_size_bits);
1919 #ifdef CONFIG_F2FS_FAULT_INJECTION
1920         if (test_opt(sbi, FAULT_INJECTION)) {
1921                 seq_printf(seq, ",fault_injection=%u",
1922                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1923                 seq_printf(seq, ",fault_type=%u",
1924                                 F2FS_OPTION(sbi).fault_info.inject_type);
1925         }
1926 #endif
1927 #ifdef CONFIG_QUOTA
1928         if (test_opt(sbi, QUOTA))
1929                 seq_puts(seq, ",quota");
1930         if (test_opt(sbi, USRQUOTA))
1931                 seq_puts(seq, ",usrquota");
1932         if (test_opt(sbi, GRPQUOTA))
1933                 seq_puts(seq, ",grpquota");
1934         if (test_opt(sbi, PRJQUOTA))
1935                 seq_puts(seq, ",prjquota");
1936 #endif
1937         f2fs_show_quota_options(seq, sbi->sb);
1938         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1939                 seq_printf(seq, ",whint_mode=%s", "user-based");
1940         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1941                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1942
1943         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1944
1945         if (sbi->sb->s_flags & SB_INLINECRYPT)
1946                 seq_puts(seq, ",inlinecrypt");
1947
1948         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1949                 seq_printf(seq, ",alloc_mode=%s", "default");
1950         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1951                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1952
1953         if (test_opt(sbi, DISABLE_CHECKPOINT))
1954                 seq_printf(seq, ",checkpoint=disable:%u",
1955                                 F2FS_OPTION(sbi).unusable_cap);
1956         if (test_opt(sbi, MERGE_CHECKPOINT))
1957                 seq_puts(seq, ",checkpoint_merge");
1958         else
1959                 seq_puts(seq, ",nocheckpoint_merge");
1960         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1961                 seq_printf(seq, ",fsync_mode=%s", "posix");
1962         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1963                 seq_printf(seq, ",fsync_mode=%s", "strict");
1964         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1965                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1966
1967 #ifdef CONFIG_F2FS_FS_COMPRESSION
1968         f2fs_show_compress_options(seq, sbi->sb);
1969 #endif
1970
1971         if (test_opt(sbi, ATGC))
1972                 seq_puts(seq, ",atgc");
1973
1974         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
1975                 seq_printf(seq, ",discard_unit=%s", "block");
1976         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
1977                 seq_printf(seq, ",discard_unit=%s", "segment");
1978         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
1979                 seq_printf(seq, ",discard_unit=%s", "section");
1980
1981         return 0;
1982 }
1983
1984 static void default_options(struct f2fs_sb_info *sbi)
1985 {
1986         /* init some FS parameters */
1987         if (f2fs_sb_has_readonly(sbi))
1988                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
1989         else
1990                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
1991
1992         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1993         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1994         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1995         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1996         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1997         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1998         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1999         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2000         F2FS_OPTION(sbi).compress_ext_cnt = 0;
2001         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2002         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2003
2004         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2005
2006         set_opt(sbi, INLINE_XATTR);
2007         set_opt(sbi, INLINE_DATA);
2008         set_opt(sbi, INLINE_DENTRY);
2009         set_opt(sbi, EXTENT_CACHE);
2010         set_opt(sbi, NOHEAP);
2011         clear_opt(sbi, DISABLE_CHECKPOINT);
2012         set_opt(sbi, MERGE_CHECKPOINT);
2013         F2FS_OPTION(sbi).unusable_cap = 0;
2014         sbi->sb->s_flags |= SB_LAZYTIME;
2015         set_opt(sbi, FLUSH_MERGE);
2016         if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2017                 set_opt(sbi, DISCARD);
2018         if (f2fs_sb_has_blkzoned(sbi)) {
2019                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2020                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2021         } else {
2022                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2023                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2024         }
2025
2026 #ifdef CONFIG_F2FS_FS_XATTR
2027         set_opt(sbi, XATTR_USER);
2028 #endif
2029 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2030         set_opt(sbi, POSIX_ACL);
2031 #endif
2032
2033         f2fs_build_fault_attr(sbi, 0, 0);
2034 }
2035
2036 #ifdef CONFIG_QUOTA
2037 static int f2fs_enable_quotas(struct super_block *sb);
2038 #endif
2039
2040 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2041 {
2042         unsigned int s_flags = sbi->sb->s_flags;
2043         struct cp_control cpc;
2044         int err = 0;
2045         int ret;
2046         block_t unusable;
2047
2048         if (s_flags & SB_RDONLY) {
2049                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2050                 return -EINVAL;
2051         }
2052         sbi->sb->s_flags |= SB_ACTIVE;
2053
2054         f2fs_update_time(sbi, DISABLE_TIME);
2055
2056         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2057                 down_write(&sbi->gc_lock);
2058                 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
2059                 if (err == -ENODATA) {
2060                         err = 0;
2061                         break;
2062                 }
2063                 if (err && err != -EAGAIN)
2064                         break;
2065         }
2066
2067         ret = sync_filesystem(sbi->sb);
2068         if (ret || err) {
2069                 err = ret ? ret : err;
2070                 goto restore_flag;
2071         }
2072
2073         unusable = f2fs_get_unusable_blocks(sbi);
2074         if (f2fs_disable_cp_again(sbi, unusable)) {
2075                 err = -EAGAIN;
2076                 goto restore_flag;
2077         }
2078
2079         down_write(&sbi->gc_lock);
2080         cpc.reason = CP_PAUSE;
2081         set_sbi_flag(sbi, SBI_CP_DISABLED);
2082         err = f2fs_write_checkpoint(sbi, &cpc);
2083         if (err)
2084                 goto out_unlock;
2085
2086         spin_lock(&sbi->stat_lock);
2087         sbi->unusable_block_count = unusable;
2088         spin_unlock(&sbi->stat_lock);
2089
2090 out_unlock:
2091         up_write(&sbi->gc_lock);
2092 restore_flag:
2093         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2094         return err;
2095 }
2096
2097 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2098 {
2099         int retry = DEFAULT_RETRY_IO_COUNT;
2100
2101         /* we should flush all the data to keep data consistency */
2102         do {
2103                 sync_inodes_sb(sbi->sb);
2104                 cond_resched();
2105                 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
2106         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2107
2108         if (unlikely(retry < 0))
2109                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2110
2111         down_write(&sbi->gc_lock);
2112         f2fs_dirty_to_prefree(sbi);
2113
2114         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2115         set_sbi_flag(sbi, SBI_IS_DIRTY);
2116         up_write(&sbi->gc_lock);
2117
2118         f2fs_sync_fs(sbi->sb, 1);
2119 }
2120
2121 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2122 {
2123         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2124         struct f2fs_mount_info org_mount_opt;
2125         unsigned long old_sb_flags;
2126         int err;
2127         bool need_restart_gc = false, need_stop_gc = false;
2128         bool need_restart_ckpt = false, need_stop_ckpt = false;
2129         bool need_restart_flush = false, need_stop_flush = false;
2130         bool need_restart_discard = false, need_stop_discard = false;
2131         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2132         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2133         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2134         bool no_atgc = !test_opt(sbi, ATGC);
2135         bool no_discard = !test_opt(sbi, DISCARD);
2136         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2137         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2138         struct discard_cmd_control *dcc;
2139 #ifdef CONFIG_QUOTA
2140         int i, j;
2141 #endif
2142
2143         /*
2144          * Save the old mount options in case we
2145          * need to restore them.
2146          */
2147         org_mount_opt = sbi->mount_opt;
2148         old_sb_flags = sb->s_flags;
2149
2150 #ifdef CONFIG_QUOTA
2151         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2152         for (i = 0; i < MAXQUOTAS; i++) {
2153                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2154                         org_mount_opt.s_qf_names[i] =
2155                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2156                                 GFP_KERNEL);
2157                         if (!org_mount_opt.s_qf_names[i]) {
2158                                 for (j = 0; j < i; j++)
2159                                         kfree(org_mount_opt.s_qf_names[j]);
2160                                 return -ENOMEM;
2161                         }
2162                 } else {
2163                         org_mount_opt.s_qf_names[i] = NULL;
2164                 }
2165         }
2166 #endif
2167
2168         /* recover superblocks we couldn't write due to previous RO mount */
2169         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2170                 err = f2fs_commit_super(sbi, false);
2171                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2172                           err);
2173                 if (!err)
2174                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2175         }
2176
2177         default_options(sbi);
2178
2179         /* parse mount options */
2180         err = parse_options(sb, data, true);
2181         if (err)
2182                 goto restore_opts;
2183
2184         /*
2185          * Previous and new state of filesystem is RO,
2186          * so skip checking GC and FLUSH_MERGE conditions.
2187          */
2188         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2189                 goto skip;
2190
2191         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2192                 err = -EROFS;
2193                 goto restore_opts;
2194         }
2195
2196 #ifdef CONFIG_QUOTA
2197         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2198                 err = dquot_suspend(sb, -1);
2199                 if (err < 0)
2200                         goto restore_opts;
2201         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2202                 /* dquot_resume needs RW */
2203                 sb->s_flags &= ~SB_RDONLY;
2204                 if (sb_any_quota_suspended(sb)) {
2205                         dquot_resume(sb, -1);
2206                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2207                         err = f2fs_enable_quotas(sb);
2208                         if (err)
2209                                 goto restore_opts;
2210                 }
2211         }
2212 #endif
2213         /* disallow enable atgc dynamically */
2214         if (no_atgc == !!test_opt(sbi, ATGC)) {
2215                 err = -EINVAL;
2216                 f2fs_warn(sbi, "switch atgc option is not allowed");
2217                 goto restore_opts;
2218         }
2219
2220         /* disallow enable/disable extent_cache dynamically */
2221         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2222                 err = -EINVAL;
2223                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2224                 goto restore_opts;
2225         }
2226
2227         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2228                 err = -EINVAL;
2229                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2230                 goto restore_opts;
2231         }
2232
2233         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2234                 err = -EINVAL;
2235                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2236                 goto restore_opts;
2237         }
2238
2239         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2240                 err = -EINVAL;
2241                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2242                 goto restore_opts;
2243         }
2244
2245         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2246                 err = -EINVAL;
2247                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2248                 goto restore_opts;
2249         }
2250
2251         /*
2252          * We stop the GC thread if FS is mounted as RO
2253          * or if background_gc = off is passed in mount
2254          * option. Also sync the filesystem.
2255          */
2256         if ((*flags & SB_RDONLY) ||
2257                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2258                         !test_opt(sbi, GC_MERGE))) {
2259                 if (sbi->gc_thread) {
2260                         f2fs_stop_gc_thread(sbi);
2261                         need_restart_gc = true;
2262                 }
2263         } else if (!sbi->gc_thread) {
2264                 err = f2fs_start_gc_thread(sbi);
2265                 if (err)
2266                         goto restore_opts;
2267                 need_stop_gc = true;
2268         }
2269
2270         if (*flags & SB_RDONLY ||
2271                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
2272                 sync_inodes_sb(sb);
2273
2274                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2275                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2276                 f2fs_sync_fs(sb, 1);
2277                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2278         }
2279
2280         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2281                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2282                 f2fs_stop_ckpt_thread(sbi);
2283                 need_restart_ckpt = true;
2284         } else {
2285                 err = f2fs_start_ckpt_thread(sbi);
2286                 if (err) {
2287                         f2fs_err(sbi,
2288                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2289                             err);
2290                         goto restore_gc;
2291                 }
2292                 need_stop_ckpt = true;
2293         }
2294
2295         /*
2296          * We stop issue flush thread if FS is mounted as RO
2297          * or if flush_merge is not passed in mount option.
2298          */
2299         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2300                 clear_opt(sbi, FLUSH_MERGE);
2301                 f2fs_destroy_flush_cmd_control(sbi, false);
2302                 need_restart_flush = true;
2303         } else {
2304                 err = f2fs_create_flush_cmd_control(sbi);
2305                 if (err)
2306                         goto restore_ckpt;
2307                 need_stop_flush = true;
2308         }
2309
2310         if (no_discard == !!test_opt(sbi, DISCARD)) {
2311                 if (test_opt(sbi, DISCARD)) {
2312                         err = f2fs_start_discard_thread(sbi);
2313                         if (err)
2314                                 goto restore_flush;
2315                         need_stop_discard = true;
2316                 } else {
2317                         dcc = SM_I(sbi)->dcc_info;
2318                         f2fs_stop_discard_thread(sbi);
2319                         if (atomic_read(&dcc->discard_cmd_cnt))
2320                                 f2fs_issue_discard_timeout(sbi);
2321                         need_restart_discard = true;
2322                 }
2323         }
2324
2325         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2326                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2327                         err = f2fs_disable_checkpoint(sbi);
2328                         if (err)
2329                                 goto restore_discard;
2330                 } else {
2331                         f2fs_enable_checkpoint(sbi);
2332                 }
2333         }
2334
2335 skip:
2336 #ifdef CONFIG_QUOTA
2337         /* Release old quota file names */
2338         for (i = 0; i < MAXQUOTAS; i++)
2339                 kfree(org_mount_opt.s_qf_names[i]);
2340 #endif
2341         /* Update the POSIXACL Flag */
2342         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2343                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2344
2345         limit_reserve_root(sbi);
2346         adjust_unusable_cap_perc(sbi);
2347         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2348         return 0;
2349 restore_discard:
2350         if (need_restart_discard) {
2351                 if (f2fs_start_discard_thread(sbi))
2352                         f2fs_warn(sbi, "discard has been stopped");
2353         } else if (need_stop_discard) {
2354                 f2fs_stop_discard_thread(sbi);
2355         }
2356 restore_flush:
2357         if (need_restart_flush) {
2358                 if (f2fs_create_flush_cmd_control(sbi))
2359                         f2fs_warn(sbi, "background flush thread has stopped");
2360         } else if (need_stop_flush) {
2361                 clear_opt(sbi, FLUSH_MERGE);
2362                 f2fs_destroy_flush_cmd_control(sbi, false);
2363         }
2364 restore_ckpt:
2365         if (need_restart_ckpt) {
2366                 if (f2fs_start_ckpt_thread(sbi))
2367                         f2fs_warn(sbi, "background ckpt thread has stopped");
2368         } else if (need_stop_ckpt) {
2369                 f2fs_stop_ckpt_thread(sbi);
2370         }
2371 restore_gc:
2372         if (need_restart_gc) {
2373                 if (f2fs_start_gc_thread(sbi))
2374                         f2fs_warn(sbi, "background gc thread has stopped");
2375         } else if (need_stop_gc) {
2376                 f2fs_stop_gc_thread(sbi);
2377         }
2378 restore_opts:
2379 #ifdef CONFIG_QUOTA
2380         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2381         for (i = 0; i < MAXQUOTAS; i++) {
2382                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2383                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2384         }
2385 #endif
2386         sbi->mount_opt = org_mount_opt;
2387         sb->s_flags = old_sb_flags;
2388         return err;
2389 }
2390
2391 #ifdef CONFIG_QUOTA
2392 /* Read data from quotafile */
2393 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2394                                size_t len, loff_t off)
2395 {
2396         struct inode *inode = sb_dqopt(sb)->files[type];
2397         struct address_space *mapping = inode->i_mapping;
2398         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2399         int offset = off & (sb->s_blocksize - 1);
2400         int tocopy;
2401         size_t toread;
2402         loff_t i_size = i_size_read(inode);
2403         struct page *page;
2404         char *kaddr;
2405
2406         if (off > i_size)
2407                 return 0;
2408
2409         if (off + len > i_size)
2410                 len = i_size - off;
2411         toread = len;
2412         while (toread > 0) {
2413                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2414 repeat:
2415                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2416                 if (IS_ERR(page)) {
2417                         if (PTR_ERR(page) == -ENOMEM) {
2418                                 congestion_wait(BLK_RW_ASYNC,
2419                                                 DEFAULT_IO_TIMEOUT);
2420                                 goto repeat;
2421                         }
2422                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2423                         return PTR_ERR(page);
2424                 }
2425
2426                 lock_page(page);
2427
2428                 if (unlikely(page->mapping != mapping)) {
2429                         f2fs_put_page(page, 1);
2430                         goto repeat;
2431                 }
2432                 if (unlikely(!PageUptodate(page))) {
2433                         f2fs_put_page(page, 1);
2434                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2435                         return -EIO;
2436                 }
2437
2438                 kaddr = kmap_atomic(page);
2439                 memcpy(data, kaddr + offset, tocopy);
2440                 kunmap_atomic(kaddr);
2441                 f2fs_put_page(page, 1);
2442
2443                 offset = 0;
2444                 toread -= tocopy;
2445                 data += tocopy;
2446                 blkidx++;
2447         }
2448         return len;
2449 }
2450
2451 /* Write to quotafile */
2452 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2453                                 const char *data, size_t len, loff_t off)
2454 {
2455         struct inode *inode = sb_dqopt(sb)->files[type];
2456         struct address_space *mapping = inode->i_mapping;
2457         const struct address_space_operations *a_ops = mapping->a_ops;
2458         int offset = off & (sb->s_blocksize - 1);
2459         size_t towrite = len;
2460         struct page *page;
2461         void *fsdata = NULL;
2462         char *kaddr;
2463         int err = 0;
2464         int tocopy;
2465
2466         while (towrite > 0) {
2467                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2468                                                                 towrite);
2469 retry:
2470                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2471                                                         &page, &fsdata);
2472                 if (unlikely(err)) {
2473                         if (err == -ENOMEM) {
2474                                 congestion_wait(BLK_RW_ASYNC,
2475                                                 DEFAULT_IO_TIMEOUT);
2476                                 goto retry;
2477                         }
2478                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2479                         break;
2480                 }
2481
2482                 kaddr = kmap_atomic(page);
2483                 memcpy(kaddr + offset, data, tocopy);
2484                 kunmap_atomic(kaddr);
2485                 flush_dcache_page(page);
2486
2487                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2488                                                 page, fsdata);
2489                 offset = 0;
2490                 towrite -= tocopy;
2491                 off += tocopy;
2492                 data += tocopy;
2493                 cond_resched();
2494         }
2495
2496         if (len == towrite)
2497                 return err;
2498         inode->i_mtime = inode->i_ctime = current_time(inode);
2499         f2fs_mark_inode_dirty_sync(inode, false);
2500         return len - towrite;
2501 }
2502
2503 int f2fs_dquot_initialize(struct inode *inode)
2504 {
2505         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2506                 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2507                 return -ESRCH;
2508         }
2509
2510         return dquot_initialize(inode);
2511 }
2512
2513 static struct dquot **f2fs_get_dquots(struct inode *inode)
2514 {
2515         return F2FS_I(inode)->i_dquot;
2516 }
2517
2518 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2519 {
2520         return &F2FS_I(inode)->i_reserved_quota;
2521 }
2522
2523 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2524 {
2525         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2526                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2527                 return 0;
2528         }
2529
2530         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2531                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2532 }
2533
2534 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2535 {
2536         int enabled = 0;
2537         int i, err;
2538
2539         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2540                 err = f2fs_enable_quotas(sbi->sb);
2541                 if (err) {
2542                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2543                         return 0;
2544                 }
2545                 return 1;
2546         }
2547
2548         for (i = 0; i < MAXQUOTAS; i++) {
2549                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2550                         err = f2fs_quota_on_mount(sbi, i);
2551                         if (!err) {
2552                                 enabled = 1;
2553                                 continue;
2554                         }
2555                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2556                                  err, i);
2557                 }
2558         }
2559         return enabled;
2560 }
2561
2562 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2563                              unsigned int flags)
2564 {
2565         struct inode *qf_inode;
2566         unsigned long qf_inum;
2567         int err;
2568
2569         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2570
2571         qf_inum = f2fs_qf_ino(sb, type);
2572         if (!qf_inum)
2573                 return -EPERM;
2574
2575         qf_inode = f2fs_iget(sb, qf_inum);
2576         if (IS_ERR(qf_inode)) {
2577                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2578                 return PTR_ERR(qf_inode);
2579         }
2580
2581         /* Don't account quota for quota files to avoid recursion */
2582         qf_inode->i_flags |= S_NOQUOTA;
2583         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2584         iput(qf_inode);
2585         return err;
2586 }
2587
2588 static int f2fs_enable_quotas(struct super_block *sb)
2589 {
2590         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2591         int type, err = 0;
2592         unsigned long qf_inum;
2593         bool quota_mopt[MAXQUOTAS] = {
2594                 test_opt(sbi, USRQUOTA),
2595                 test_opt(sbi, GRPQUOTA),
2596                 test_opt(sbi, PRJQUOTA),
2597         };
2598
2599         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2600                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2601                 return 0;
2602         }
2603
2604         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2605
2606         for (type = 0; type < MAXQUOTAS; type++) {
2607                 qf_inum = f2fs_qf_ino(sb, type);
2608                 if (qf_inum) {
2609                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2610                                 DQUOT_USAGE_ENABLED |
2611                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2612                         if (err) {
2613                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2614                                          type, err);
2615                                 for (type--; type >= 0; type--)
2616                                         dquot_quota_off(sb, type);
2617                                 set_sbi_flag(F2FS_SB(sb),
2618                                                 SBI_QUOTA_NEED_REPAIR);
2619                                 return err;
2620                         }
2621                 }
2622         }
2623         return 0;
2624 }
2625
2626 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2627 {
2628         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2629         struct address_space *mapping = dqopt->files[type]->i_mapping;
2630         int ret = 0;
2631
2632         ret = dquot_writeback_dquots(sbi->sb, type);
2633         if (ret)
2634                 goto out;
2635
2636         ret = filemap_fdatawrite(mapping);
2637         if (ret)
2638                 goto out;
2639
2640         /* if we are using journalled quota */
2641         if (is_journalled_quota(sbi))
2642                 goto out;
2643
2644         ret = filemap_fdatawait(mapping);
2645
2646         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2647 out:
2648         if (ret)
2649                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2650         return ret;
2651 }
2652
2653 int f2fs_quota_sync(struct super_block *sb, int type)
2654 {
2655         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2656         struct quota_info *dqopt = sb_dqopt(sb);
2657         int cnt;
2658         int ret;
2659
2660         /*
2661          * Now when everything is written we can discard the pagecache so
2662          * that userspace sees the changes.
2663          */
2664         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2665
2666                 if (type != -1 && cnt != type)
2667                         continue;
2668
2669                 if (!sb_has_quota_active(sb, type))
2670                         return 0;
2671
2672                 inode_lock(dqopt->files[cnt]);
2673
2674                 /*
2675                  * do_quotactl
2676                  *  f2fs_quota_sync
2677                  *  down_read(quota_sem)
2678                  *  dquot_writeback_dquots()
2679                  *  f2fs_dquot_commit
2680                  *                            block_operation
2681                  *                            down_read(quota_sem)
2682                  */
2683                 f2fs_lock_op(sbi);
2684                 down_read(&sbi->quota_sem);
2685
2686                 ret = f2fs_quota_sync_file(sbi, cnt);
2687
2688                 up_read(&sbi->quota_sem);
2689                 f2fs_unlock_op(sbi);
2690
2691                 inode_unlock(dqopt->files[cnt]);
2692
2693                 if (ret)
2694                         break;
2695         }
2696         return ret;
2697 }
2698
2699 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2700                                                         const struct path *path)
2701 {
2702         struct inode *inode;
2703         int err;
2704
2705         /* if quota sysfile exists, deny enabling quota with specific file */
2706         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2707                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2708                 return -EBUSY;
2709         }
2710
2711         err = f2fs_quota_sync(sb, type);
2712         if (err)
2713                 return err;
2714
2715         err = dquot_quota_on(sb, type, format_id, path);
2716         if (err)
2717                 return err;
2718
2719         inode = d_inode(path->dentry);
2720
2721         inode_lock(inode);
2722         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2723         f2fs_set_inode_flags(inode);
2724         inode_unlock(inode);
2725         f2fs_mark_inode_dirty_sync(inode, false);
2726
2727         return 0;
2728 }
2729
2730 static int __f2fs_quota_off(struct super_block *sb, int type)
2731 {
2732         struct inode *inode = sb_dqopt(sb)->files[type];
2733         int err;
2734
2735         if (!inode || !igrab(inode))
2736                 return dquot_quota_off(sb, type);
2737
2738         err = f2fs_quota_sync(sb, type);
2739         if (err)
2740                 goto out_put;
2741
2742         err = dquot_quota_off(sb, type);
2743         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2744                 goto out_put;
2745
2746         inode_lock(inode);
2747         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2748         f2fs_set_inode_flags(inode);
2749         inode_unlock(inode);
2750         f2fs_mark_inode_dirty_sync(inode, false);
2751 out_put:
2752         iput(inode);
2753         return err;
2754 }
2755
2756 static int f2fs_quota_off(struct super_block *sb, int type)
2757 {
2758         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2759         int err;
2760
2761         err = __f2fs_quota_off(sb, type);
2762
2763         /*
2764          * quotactl can shutdown journalled quota, result in inconsistence
2765          * between quota record and fs data by following updates, tag the
2766          * flag to let fsck be aware of it.
2767          */
2768         if (is_journalled_quota(sbi))
2769                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2770         return err;
2771 }
2772
2773 void f2fs_quota_off_umount(struct super_block *sb)
2774 {
2775         int type;
2776         int err;
2777
2778         for (type = 0; type < MAXQUOTAS; type++) {
2779                 err = __f2fs_quota_off(sb, type);
2780                 if (err) {
2781                         int ret = dquot_quota_off(sb, type);
2782
2783                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2784                                  type, err, ret);
2785                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2786                 }
2787         }
2788         /*
2789          * In case of checkpoint=disable, we must flush quota blocks.
2790          * This can cause NULL exception for node_inode in end_io, since
2791          * put_super already dropped it.
2792          */
2793         sync_filesystem(sb);
2794 }
2795
2796 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2797 {
2798         struct quota_info *dqopt = sb_dqopt(sb);
2799         int type;
2800
2801         for (type = 0; type < MAXQUOTAS; type++) {
2802                 if (!dqopt->files[type])
2803                         continue;
2804                 f2fs_inode_synced(dqopt->files[type]);
2805         }
2806 }
2807
2808 static int f2fs_dquot_commit(struct dquot *dquot)
2809 {
2810         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2811         int ret;
2812
2813         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2814         ret = dquot_commit(dquot);
2815         if (ret < 0)
2816                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2817         up_read(&sbi->quota_sem);
2818         return ret;
2819 }
2820
2821 static int f2fs_dquot_acquire(struct dquot *dquot)
2822 {
2823         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2824         int ret;
2825
2826         down_read(&sbi->quota_sem);
2827         ret = dquot_acquire(dquot);
2828         if (ret < 0)
2829                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2830         up_read(&sbi->quota_sem);
2831         return ret;
2832 }
2833
2834 static int f2fs_dquot_release(struct dquot *dquot)
2835 {
2836         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2837         int ret = dquot_release(dquot);
2838
2839         if (ret < 0)
2840                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2841         return ret;
2842 }
2843
2844 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2845 {
2846         struct super_block *sb = dquot->dq_sb;
2847         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2848         int ret = dquot_mark_dquot_dirty(dquot);
2849
2850         /* if we are using journalled quota */
2851         if (is_journalled_quota(sbi))
2852                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2853
2854         return ret;
2855 }
2856
2857 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2858 {
2859         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2860         int ret = dquot_commit_info(sb, type);
2861
2862         if (ret < 0)
2863                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2864         return ret;
2865 }
2866
2867 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2868 {
2869         *projid = F2FS_I(inode)->i_projid;
2870         return 0;
2871 }
2872
2873 static const struct dquot_operations f2fs_quota_operations = {
2874         .get_reserved_space = f2fs_get_reserved_space,
2875         .write_dquot    = f2fs_dquot_commit,
2876         .acquire_dquot  = f2fs_dquot_acquire,
2877         .release_dquot  = f2fs_dquot_release,
2878         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2879         .write_info     = f2fs_dquot_commit_info,
2880         .alloc_dquot    = dquot_alloc,
2881         .destroy_dquot  = dquot_destroy,
2882         .get_projid     = f2fs_get_projid,
2883         .get_next_id    = dquot_get_next_id,
2884 };
2885
2886 static const struct quotactl_ops f2fs_quotactl_ops = {
2887         .quota_on       = f2fs_quota_on,
2888         .quota_off      = f2fs_quota_off,
2889         .quota_sync     = f2fs_quota_sync,
2890         .get_state      = dquot_get_state,
2891         .set_info       = dquot_set_dqinfo,
2892         .get_dqblk      = dquot_get_dqblk,
2893         .set_dqblk      = dquot_set_dqblk,
2894         .get_nextdqblk  = dquot_get_next_dqblk,
2895 };
2896 #else
2897 int f2fs_dquot_initialize(struct inode *inode)
2898 {
2899         return 0;
2900 }
2901
2902 int f2fs_quota_sync(struct super_block *sb, int type)
2903 {
2904         return 0;
2905 }
2906
2907 void f2fs_quota_off_umount(struct super_block *sb)
2908 {
2909 }
2910 #endif
2911
2912 static const struct super_operations f2fs_sops = {
2913         .alloc_inode    = f2fs_alloc_inode,
2914         .free_inode     = f2fs_free_inode,
2915         .drop_inode     = f2fs_drop_inode,
2916         .write_inode    = f2fs_write_inode,
2917         .dirty_inode    = f2fs_dirty_inode,
2918         .show_options   = f2fs_show_options,
2919 #ifdef CONFIG_QUOTA
2920         .quota_read     = f2fs_quota_read,
2921         .quota_write    = f2fs_quota_write,
2922         .get_dquots     = f2fs_get_dquots,
2923 #endif
2924         .evict_inode    = f2fs_evict_inode,
2925         .put_super      = f2fs_put_super,
2926         .sync_fs        = f2fs_sync_fs,
2927         .freeze_fs      = f2fs_freeze,
2928         .unfreeze_fs    = f2fs_unfreeze,
2929         .statfs         = f2fs_statfs,
2930         .remount_fs     = f2fs_remount,
2931 };
2932
2933 #ifdef CONFIG_FS_ENCRYPTION
2934 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2935 {
2936         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2937                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2938                                 ctx, len, NULL);
2939 }
2940
2941 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2942                                                         void *fs_data)
2943 {
2944         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2945
2946         /*
2947          * Encrypting the root directory is not allowed because fsck
2948          * expects lost+found directory to exist and remain unencrypted
2949          * if LOST_FOUND feature is enabled.
2950          *
2951          */
2952         if (f2fs_sb_has_lost_found(sbi) &&
2953                         inode->i_ino == F2FS_ROOT_INO(sbi))
2954                 return -EPERM;
2955
2956         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2957                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2958                                 ctx, len, fs_data, XATTR_CREATE);
2959 }
2960
2961 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2962 {
2963         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2964 }
2965
2966 static bool f2fs_has_stable_inodes(struct super_block *sb)
2967 {
2968         return true;
2969 }
2970
2971 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2972                                        int *ino_bits_ret, int *lblk_bits_ret)
2973 {
2974         *ino_bits_ret = 8 * sizeof(nid_t);
2975         *lblk_bits_ret = 8 * sizeof(block_t);
2976 }
2977
2978 static int f2fs_get_num_devices(struct super_block *sb)
2979 {
2980         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2981
2982         if (f2fs_is_multi_device(sbi))
2983                 return sbi->s_ndevs;
2984         return 1;
2985 }
2986
2987 static void f2fs_get_devices(struct super_block *sb,
2988                              struct request_queue **devs)
2989 {
2990         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2991         int i;
2992
2993         for (i = 0; i < sbi->s_ndevs; i++)
2994                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2995 }
2996
2997 static const struct fscrypt_operations f2fs_cryptops = {
2998         .key_prefix             = "f2fs:",
2999         .get_context            = f2fs_get_context,
3000         .set_context            = f2fs_set_context,
3001         .get_dummy_policy       = f2fs_get_dummy_policy,
3002         .empty_dir              = f2fs_empty_dir,
3003         .has_stable_inodes      = f2fs_has_stable_inodes,
3004         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3005         .get_num_devices        = f2fs_get_num_devices,
3006         .get_devices            = f2fs_get_devices,
3007 };
3008 #endif
3009
3010 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3011                 u64 ino, u32 generation)
3012 {
3013         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3014         struct inode *inode;
3015
3016         if (f2fs_check_nid_range(sbi, ino))
3017                 return ERR_PTR(-ESTALE);
3018
3019         /*
3020          * f2fs_iget isn't quite right if the inode is currently unallocated!
3021          * However f2fs_iget currently does appropriate checks to handle stale
3022          * inodes so everything is OK.
3023          */
3024         inode = f2fs_iget(sb, ino);
3025         if (IS_ERR(inode))
3026                 return ERR_CAST(inode);
3027         if (unlikely(generation && inode->i_generation != generation)) {
3028                 /* we didn't find the right inode.. */
3029                 iput(inode);
3030                 return ERR_PTR(-ESTALE);
3031         }
3032         return inode;
3033 }
3034
3035 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3036                 int fh_len, int fh_type)
3037 {
3038         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3039                                     f2fs_nfs_get_inode);
3040 }
3041
3042 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3043                 int fh_len, int fh_type)
3044 {
3045         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3046                                     f2fs_nfs_get_inode);
3047 }
3048
3049 static const struct export_operations f2fs_export_ops = {
3050         .fh_to_dentry = f2fs_fh_to_dentry,
3051         .fh_to_parent = f2fs_fh_to_parent,
3052         .get_parent = f2fs_get_parent,
3053 };
3054
3055 loff_t max_file_blocks(struct inode *inode)
3056 {
3057         loff_t result = 0;
3058         loff_t leaf_count;
3059
3060         /*
3061          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3062          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3063          * space in inode.i_addr, it will be more safe to reassign
3064          * result as zero.
3065          */
3066
3067         if (inode && f2fs_compressed_file(inode))
3068                 leaf_count = ADDRS_PER_BLOCK(inode);
3069         else
3070                 leaf_count = DEF_ADDRS_PER_BLOCK;
3071
3072         /* two direct node blocks */
3073         result += (leaf_count * 2);
3074
3075         /* two indirect node blocks */
3076         leaf_count *= NIDS_PER_BLOCK;
3077         result += (leaf_count * 2);
3078
3079         /* one double indirect node block */
3080         leaf_count *= NIDS_PER_BLOCK;
3081         result += leaf_count;
3082
3083         return result;
3084 }
3085
3086 static int __f2fs_commit_super(struct buffer_head *bh,
3087                         struct f2fs_super_block *super)
3088 {
3089         lock_buffer(bh);
3090         if (super)
3091                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3092         set_buffer_dirty(bh);
3093         unlock_buffer(bh);
3094
3095         /* it's rare case, we can do fua all the time */
3096         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3097 }
3098
3099 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3100                                         struct buffer_head *bh)
3101 {
3102         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3103                                         (bh->b_data + F2FS_SUPER_OFFSET);
3104         struct super_block *sb = sbi->sb;
3105         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3106         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3107         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3108         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3109         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3110         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3111         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3112         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3113         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3114         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3115         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3116         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3117         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3118         u64 main_end_blkaddr = main_blkaddr +
3119                                 (segment_count_main << log_blocks_per_seg);
3120         u64 seg_end_blkaddr = segment0_blkaddr +
3121                                 (segment_count << log_blocks_per_seg);
3122
3123         if (segment0_blkaddr != cp_blkaddr) {
3124                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3125                           segment0_blkaddr, cp_blkaddr);
3126                 return true;
3127         }
3128
3129         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3130                                                         sit_blkaddr) {
3131                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3132                           cp_blkaddr, sit_blkaddr,
3133                           segment_count_ckpt << log_blocks_per_seg);
3134                 return true;
3135         }
3136
3137         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3138                                                         nat_blkaddr) {
3139                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3140                           sit_blkaddr, nat_blkaddr,
3141                           segment_count_sit << log_blocks_per_seg);
3142                 return true;
3143         }
3144
3145         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3146                                                         ssa_blkaddr) {
3147                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3148                           nat_blkaddr, ssa_blkaddr,
3149                           segment_count_nat << log_blocks_per_seg);
3150                 return true;
3151         }
3152
3153         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3154                                                         main_blkaddr) {
3155                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3156                           ssa_blkaddr, main_blkaddr,
3157                           segment_count_ssa << log_blocks_per_seg);
3158                 return true;
3159         }
3160
3161         if (main_end_blkaddr > seg_end_blkaddr) {
3162                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3163                           main_blkaddr, seg_end_blkaddr,
3164                           segment_count_main << log_blocks_per_seg);
3165                 return true;
3166         } else if (main_end_blkaddr < seg_end_blkaddr) {
3167                 int err = 0;
3168                 char *res;
3169
3170                 /* fix in-memory information all the time */
3171                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3172                                 segment0_blkaddr) >> log_blocks_per_seg);
3173
3174                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3175                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3176                         res = "internally";
3177                 } else {
3178                         err = __f2fs_commit_super(bh, NULL);
3179                         res = err ? "failed" : "done";
3180                 }
3181                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3182                           res, main_blkaddr, seg_end_blkaddr,
3183                           segment_count_main << log_blocks_per_seg);
3184                 if (err)
3185                         return true;
3186         }
3187         return false;
3188 }
3189
3190 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3191                                 struct buffer_head *bh)
3192 {
3193         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3194         block_t total_sections, blocks_per_seg;
3195         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3196                                         (bh->b_data + F2FS_SUPER_OFFSET);
3197         size_t crc_offset = 0;
3198         __u32 crc = 0;
3199
3200         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3201                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3202                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3203                 return -EINVAL;
3204         }
3205
3206         /* Check checksum_offset and crc in superblock */
3207         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3208                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3209                 if (crc_offset !=
3210                         offsetof(struct f2fs_super_block, crc)) {
3211                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3212                                   crc_offset);
3213                         return -EFSCORRUPTED;
3214                 }
3215                 crc = le32_to_cpu(raw_super->crc);
3216                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3217                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3218                         return -EFSCORRUPTED;
3219                 }
3220         }
3221
3222         /* Currently, support only 4KB block size */
3223         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3224                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3225                           le32_to_cpu(raw_super->log_blocksize),
3226                           F2FS_BLKSIZE_BITS);
3227                 return -EFSCORRUPTED;
3228         }
3229
3230         /* check log blocks per segment */
3231         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3232                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3233                           le32_to_cpu(raw_super->log_blocks_per_seg));
3234                 return -EFSCORRUPTED;
3235         }
3236
3237         /* Currently, support 512/1024/2048/4096 bytes sector size */
3238         if (le32_to_cpu(raw_super->log_sectorsize) >
3239                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3240                 le32_to_cpu(raw_super->log_sectorsize) <
3241                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3242                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3243                           le32_to_cpu(raw_super->log_sectorsize));
3244                 return -EFSCORRUPTED;
3245         }
3246         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3247                 le32_to_cpu(raw_super->log_sectorsize) !=
3248                         F2FS_MAX_LOG_SECTOR_SIZE) {
3249                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3250                           le32_to_cpu(raw_super->log_sectors_per_block),
3251                           le32_to_cpu(raw_super->log_sectorsize));
3252                 return -EFSCORRUPTED;
3253         }
3254
3255         segment_count = le32_to_cpu(raw_super->segment_count);
3256         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3257         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3258         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3259         total_sections = le32_to_cpu(raw_super->section_count);
3260
3261         /* blocks_per_seg should be 512, given the above check */
3262         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3263
3264         if (segment_count > F2FS_MAX_SEGMENT ||
3265                                 segment_count < F2FS_MIN_SEGMENTS) {
3266                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3267                 return -EFSCORRUPTED;
3268         }
3269
3270         if (total_sections > segment_count_main || total_sections < 1 ||
3271                         segs_per_sec > segment_count || !segs_per_sec) {
3272                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3273                           segment_count, total_sections, segs_per_sec);
3274                 return -EFSCORRUPTED;
3275         }
3276
3277         if (segment_count_main != total_sections * segs_per_sec) {
3278                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3279                           segment_count_main, total_sections, segs_per_sec);
3280                 return -EFSCORRUPTED;
3281         }
3282
3283         if ((segment_count / segs_per_sec) < total_sections) {
3284                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3285                           segment_count, segs_per_sec, total_sections);
3286                 return -EFSCORRUPTED;
3287         }
3288
3289         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3290                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3291                           segment_count, le64_to_cpu(raw_super->block_count));
3292                 return -EFSCORRUPTED;
3293         }
3294
3295         if (RDEV(0).path[0]) {
3296                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3297                 int i = 1;
3298
3299                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3300                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3301                         i++;
3302                 }
3303                 if (segment_count != dev_seg_count) {
3304                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3305                                         segment_count, dev_seg_count);
3306                         return -EFSCORRUPTED;
3307                 }
3308         } else {
3309                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3310                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3311                         f2fs_info(sbi, "Zoned block device path is missing");
3312                         return -EFSCORRUPTED;
3313                 }
3314         }
3315
3316         if (secs_per_zone > total_sections || !secs_per_zone) {
3317                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3318                           secs_per_zone, total_sections);
3319                 return -EFSCORRUPTED;
3320         }
3321         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3322                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3323                         (le32_to_cpu(raw_super->extension_count) +
3324                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3325                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3326                           le32_to_cpu(raw_super->extension_count),
3327                           raw_super->hot_ext_count,
3328                           F2FS_MAX_EXTENSION);
3329                 return -EFSCORRUPTED;
3330         }
3331
3332         if (le32_to_cpu(raw_super->cp_payload) >=
3333                                 (blocks_per_seg - F2FS_CP_PACKS -
3334                                 NR_CURSEG_PERSIST_TYPE)) {
3335                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3336                           le32_to_cpu(raw_super->cp_payload),
3337                           blocks_per_seg - F2FS_CP_PACKS -
3338                           NR_CURSEG_PERSIST_TYPE);
3339                 return -EFSCORRUPTED;
3340         }
3341
3342         /* check reserved ino info */
3343         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3344                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3345                 le32_to_cpu(raw_super->root_ino) != 3) {
3346                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3347                           le32_to_cpu(raw_super->node_ino),
3348                           le32_to_cpu(raw_super->meta_ino),
3349                           le32_to_cpu(raw_super->root_ino));
3350                 return -EFSCORRUPTED;
3351         }
3352
3353         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3354         if (sanity_check_area_boundary(sbi, bh))
3355                 return -EFSCORRUPTED;
3356
3357         return 0;
3358 }
3359
3360 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3361 {
3362         unsigned int total, fsmeta;
3363         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3364         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3365         unsigned int ovp_segments, reserved_segments;
3366         unsigned int main_segs, blocks_per_seg;
3367         unsigned int sit_segs, nat_segs;
3368         unsigned int sit_bitmap_size, nat_bitmap_size;
3369         unsigned int log_blocks_per_seg;
3370         unsigned int segment_count_main;
3371         unsigned int cp_pack_start_sum, cp_payload;
3372         block_t user_block_count, valid_user_blocks;
3373         block_t avail_node_count, valid_node_count;
3374         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3375         int i, j;
3376
3377         total = le32_to_cpu(raw_super->segment_count);
3378         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3379         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3380         fsmeta += sit_segs;
3381         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3382         fsmeta += nat_segs;
3383         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3384         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3385
3386         if (unlikely(fsmeta >= total))
3387                 return 1;
3388
3389         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3390         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3391
3392         if (!f2fs_sb_has_readonly(sbi) &&
3393                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3394                         ovp_segments == 0 || reserved_segments == 0)) {
3395                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3396                 return 1;
3397         }
3398         user_block_count = le64_to_cpu(ckpt->user_block_count);
3399         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3400                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3401         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3402         if (!user_block_count || user_block_count >=
3403                         segment_count_main << log_blocks_per_seg) {
3404                 f2fs_err(sbi, "Wrong user_block_count: %u",
3405                          user_block_count);
3406                 return 1;
3407         }
3408
3409         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3410         if (valid_user_blocks > user_block_count) {
3411                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3412                          valid_user_blocks, user_block_count);
3413                 return 1;
3414         }
3415
3416         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3417         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3418         if (valid_node_count > avail_node_count) {
3419                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3420                          valid_node_count, avail_node_count);
3421                 return 1;
3422         }
3423
3424         main_segs = le32_to_cpu(raw_super->segment_count_main);
3425         blocks_per_seg = sbi->blocks_per_seg;
3426
3427         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3428                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3429                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3430                         return 1;
3431
3432                 if (f2fs_sb_has_readonly(sbi))
3433                         goto check_data;
3434
3435                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3436                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3437                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3438                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3439                                          i, j,
3440                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3441                                 return 1;
3442                         }
3443                 }
3444         }
3445 check_data:
3446         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3447                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3448                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3449                         return 1;
3450
3451                 if (f2fs_sb_has_readonly(sbi))
3452                         goto skip_cross;
3453
3454                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3455                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3456                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3457                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3458                                          i, j,
3459                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3460                                 return 1;
3461                         }
3462                 }
3463         }
3464         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3465                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3466                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3467                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3468                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3469                                          i, j,
3470                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3471                                 return 1;
3472                         }
3473                 }
3474         }
3475 skip_cross:
3476         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3477         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3478
3479         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3480                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3481                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3482                          sit_bitmap_size, nat_bitmap_size);
3483                 return 1;
3484         }
3485
3486         cp_pack_start_sum = __start_sum_addr(sbi);
3487         cp_payload = __cp_payload(sbi);
3488         if (cp_pack_start_sum < cp_payload + 1 ||
3489                 cp_pack_start_sum > blocks_per_seg - 1 -
3490                         NR_CURSEG_PERSIST_TYPE) {
3491                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3492                          cp_pack_start_sum);
3493                 return 1;
3494         }
3495
3496         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3497                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3498                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3499                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3500                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3501                           le32_to_cpu(ckpt->checksum_offset));
3502                 return 1;
3503         }
3504
3505         nat_blocks = nat_segs << log_blocks_per_seg;
3506         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3507         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3508         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3509                 (cp_payload + F2FS_CP_PACKS +
3510                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3511                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3512                           cp_payload, nat_bits_blocks);
3513                 return 1;
3514         }
3515
3516         if (unlikely(f2fs_cp_error(sbi))) {
3517                 f2fs_err(sbi, "A bug case: need to run fsck");
3518                 return 1;
3519         }
3520         return 0;
3521 }
3522
3523 static void init_sb_info(struct f2fs_sb_info *sbi)
3524 {
3525         struct f2fs_super_block *raw_super = sbi->raw_super;
3526         int i;
3527
3528         sbi->log_sectors_per_block =
3529                 le32_to_cpu(raw_super->log_sectors_per_block);
3530         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3531         sbi->blocksize = 1 << sbi->log_blocksize;
3532         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3533         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3534         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3535         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3536         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3537         sbi->total_node_count =
3538                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3539                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3540         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3541         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3542         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3543         sbi->cur_victim_sec = NULL_SECNO;
3544         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3545         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3546         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3547         sbi->migration_granularity = sbi->segs_per_sec;
3548         sbi->seq_file_ra_mul = MIN_RA_MUL;
3549         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3550         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3551
3552         sbi->dir_level = DEF_DIR_LEVEL;
3553         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3554         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3555         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3556         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3557         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3558         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3559                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3560         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3561
3562         for (i = 0; i < NR_COUNT_TYPE; i++)
3563                 atomic_set(&sbi->nr_pages[i], 0);
3564
3565         for (i = 0; i < META; i++)
3566                 atomic_set(&sbi->wb_sync_req[i], 0);
3567
3568         INIT_LIST_HEAD(&sbi->s_list);
3569         mutex_init(&sbi->umount_mutex);
3570         init_rwsem(&sbi->io_order_lock);
3571         spin_lock_init(&sbi->cp_lock);
3572
3573         sbi->dirty_device = 0;
3574         spin_lock_init(&sbi->dev_lock);
3575
3576         init_rwsem(&sbi->sb_lock);
3577         init_rwsem(&sbi->pin_sem);
3578 }
3579
3580 static int init_percpu_info(struct f2fs_sb_info *sbi)
3581 {
3582         int err;
3583
3584         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3585         if (err)
3586                 return err;
3587
3588         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3589                                                                 GFP_KERNEL);
3590         if (err)
3591                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3592
3593         return err;
3594 }
3595
3596 #ifdef CONFIG_BLK_DEV_ZONED
3597
3598 struct f2fs_report_zones_args {
3599         struct f2fs_dev_info *dev;
3600         bool zone_cap_mismatch;
3601 };
3602
3603 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3604                               void *data)
3605 {
3606         struct f2fs_report_zones_args *rz_args = data;
3607
3608         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3609                 return 0;
3610
3611         set_bit(idx, rz_args->dev->blkz_seq);
3612         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3613                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3614         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3615                 rz_args->zone_cap_mismatch = true;
3616
3617         return 0;
3618 }
3619
3620 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3621 {
3622         struct block_device *bdev = FDEV(devi).bdev;
3623         sector_t nr_sectors = bdev_nr_sectors(bdev);
3624         struct f2fs_report_zones_args rep_zone_arg;
3625         int ret;
3626
3627         if (!f2fs_sb_has_blkzoned(sbi))
3628                 return 0;
3629
3630         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3631                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3632                 return -EINVAL;
3633         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3634         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3635                                 __ilog2_u32(sbi->blocks_per_blkz))
3636                 return -EINVAL;
3637         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3638         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3639                                         sbi->log_blocks_per_blkz;
3640         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3641                 FDEV(devi).nr_blkz++;
3642
3643         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3644                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3645                                         * sizeof(unsigned long),
3646                                         GFP_KERNEL);
3647         if (!FDEV(devi).blkz_seq)
3648                 return -ENOMEM;
3649
3650         /* Get block zones type and zone-capacity */
3651         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3652                                         FDEV(devi).nr_blkz * sizeof(block_t),
3653                                         GFP_KERNEL);
3654         if (!FDEV(devi).zone_capacity_blocks)
3655                 return -ENOMEM;
3656
3657         rep_zone_arg.dev = &FDEV(devi);
3658         rep_zone_arg.zone_cap_mismatch = false;
3659
3660         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3661                                   &rep_zone_arg);
3662         if (ret < 0)
3663                 return ret;
3664
3665         if (!rep_zone_arg.zone_cap_mismatch) {
3666                 kfree(FDEV(devi).zone_capacity_blocks);
3667                 FDEV(devi).zone_capacity_blocks = NULL;
3668         }
3669
3670         return 0;
3671 }
3672 #endif
3673
3674 /*
3675  * Read f2fs raw super block.
3676  * Because we have two copies of super block, so read both of them
3677  * to get the first valid one. If any one of them is broken, we pass
3678  * them recovery flag back to the caller.
3679  */
3680 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3681                         struct f2fs_super_block **raw_super,
3682                         int *valid_super_block, int *recovery)
3683 {
3684         struct super_block *sb = sbi->sb;
3685         int block;
3686         struct buffer_head *bh;
3687         struct f2fs_super_block *super;
3688         int err = 0;
3689
3690         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3691         if (!super)
3692                 return -ENOMEM;
3693
3694         for (block = 0; block < 2; block++) {
3695                 bh = sb_bread(sb, block);
3696                 if (!bh) {
3697                         f2fs_err(sbi, "Unable to read %dth superblock",
3698                                  block + 1);
3699                         err = -EIO;
3700                         *recovery = 1;
3701                         continue;
3702                 }
3703
3704                 /* sanity checking of raw super */
3705                 err = sanity_check_raw_super(sbi, bh);
3706                 if (err) {
3707                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3708                                  block + 1);
3709                         brelse(bh);
3710                         *recovery = 1;
3711                         continue;
3712                 }
3713
3714                 if (!*raw_super) {
3715                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3716                                                         sizeof(*super));
3717                         *valid_super_block = block;
3718                         *raw_super = super;
3719                 }
3720                 brelse(bh);
3721         }
3722
3723         /* No valid superblock */
3724         if (!*raw_super)
3725                 kfree(super);
3726         else
3727                 err = 0;
3728
3729         return err;
3730 }
3731
3732 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3733 {
3734         struct buffer_head *bh;
3735         __u32 crc = 0;
3736         int err;
3737
3738         if ((recover && f2fs_readonly(sbi->sb)) ||
3739                                 bdev_read_only(sbi->sb->s_bdev)) {
3740                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3741                 return -EROFS;
3742         }
3743
3744         /* we should update superblock crc here */
3745         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3746                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3747                                 offsetof(struct f2fs_super_block, crc));
3748                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3749         }
3750
3751         /* write back-up superblock first */
3752         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3753         if (!bh)
3754                 return -EIO;
3755         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3756         brelse(bh);
3757
3758         /* if we are in recovery path, skip writing valid superblock */
3759         if (recover || err)
3760                 return err;
3761
3762         /* write current valid superblock */
3763         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3764         if (!bh)
3765                 return -EIO;
3766         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3767         brelse(bh);
3768         return err;
3769 }
3770
3771 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3772 {
3773         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3774         unsigned int max_devices = MAX_DEVICES;
3775         unsigned int logical_blksize;
3776         int i;
3777
3778         /* Initialize single device information */
3779         if (!RDEV(0).path[0]) {
3780                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3781                         return 0;
3782                 max_devices = 1;
3783         }
3784
3785         /*
3786          * Initialize multiple devices information, or single
3787          * zoned block device information.
3788          */
3789         sbi->devs = f2fs_kzalloc(sbi,
3790                                  array_size(max_devices,
3791                                             sizeof(struct f2fs_dev_info)),
3792                                  GFP_KERNEL);
3793         if (!sbi->devs)
3794                 return -ENOMEM;
3795
3796         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3797         sbi->aligned_blksize = true;
3798
3799         for (i = 0; i < max_devices; i++) {
3800
3801                 if (i > 0 && !RDEV(i).path[0])
3802                         break;
3803
3804                 if (max_devices == 1) {
3805                         /* Single zoned block device mount */
3806                         FDEV(0).bdev =
3807                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3808                                         sbi->sb->s_mode, sbi->sb->s_type);
3809                 } else {
3810                         /* Multi-device mount */
3811                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3812                         FDEV(i).total_segments =
3813                                 le32_to_cpu(RDEV(i).total_segments);
3814                         if (i == 0) {
3815                                 FDEV(i).start_blk = 0;
3816                                 FDEV(i).end_blk = FDEV(i).start_blk +
3817                                     (FDEV(i).total_segments <<
3818                                     sbi->log_blocks_per_seg) - 1 +
3819                                     le32_to_cpu(raw_super->segment0_blkaddr);
3820                         } else {
3821                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3822                                 FDEV(i).end_blk = FDEV(i).start_blk +
3823                                         (FDEV(i).total_segments <<
3824                                         sbi->log_blocks_per_seg) - 1;
3825                         }
3826                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3827                                         sbi->sb->s_mode, sbi->sb->s_type);
3828                 }
3829                 if (IS_ERR(FDEV(i).bdev))
3830                         return PTR_ERR(FDEV(i).bdev);
3831
3832                 /* to release errored devices */
3833                 sbi->s_ndevs = i + 1;
3834
3835                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
3836                         sbi->aligned_blksize = false;
3837
3838 #ifdef CONFIG_BLK_DEV_ZONED
3839                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3840                                 !f2fs_sb_has_blkzoned(sbi)) {
3841                         f2fs_err(sbi, "Zoned block device feature not enabled");
3842                         return -EINVAL;
3843                 }
3844                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3845                         if (init_blkz_info(sbi, i)) {
3846                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3847                                 return -EINVAL;
3848                         }
3849                         if (max_devices == 1)
3850                                 break;
3851                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3852                                   i, FDEV(i).path,
3853                                   FDEV(i).total_segments,
3854                                   FDEV(i).start_blk, FDEV(i).end_blk,
3855                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3856                                   "Host-aware" : "Host-managed");
3857                         continue;
3858                 }
3859 #endif
3860                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3861                           i, FDEV(i).path,
3862                           FDEV(i).total_segments,
3863                           FDEV(i).start_blk, FDEV(i).end_blk);
3864         }
3865         f2fs_info(sbi,
3866                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3867         return 0;
3868 }
3869
3870 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3871 {
3872 #ifdef CONFIG_UNICODE
3873         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3874                 const struct f2fs_sb_encodings *encoding_info;
3875                 struct unicode_map *encoding;
3876                 __u16 encoding_flags;
3877
3878                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3879                                           &encoding_flags)) {
3880                         f2fs_err(sbi,
3881                                  "Encoding requested by superblock is unknown");
3882                         return -EINVAL;
3883                 }
3884
3885                 encoding = utf8_load(encoding_info->version);
3886                 if (IS_ERR(encoding)) {
3887                         f2fs_err(sbi,
3888                                  "can't mount with superblock charset: %s-%s "
3889                                  "not supported by the kernel. flags: 0x%x.",
3890                                  encoding_info->name, encoding_info->version,
3891                                  encoding_flags);
3892                         return PTR_ERR(encoding);
3893                 }
3894                 f2fs_info(sbi, "Using encoding defined by superblock: "
3895                          "%s-%s with flags 0x%hx", encoding_info->name,
3896                          encoding_info->version?:"\b", encoding_flags);
3897
3898                 sbi->sb->s_encoding = encoding;
3899                 sbi->sb->s_encoding_flags = encoding_flags;
3900         }
3901 #else
3902         if (f2fs_sb_has_casefold(sbi)) {
3903                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3904                 return -EINVAL;
3905         }
3906 #endif
3907         return 0;
3908 }
3909
3910 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3911 {
3912         struct f2fs_sm_info *sm_i = SM_I(sbi);
3913
3914         /* adjust parameters according to the volume size */
3915         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3916                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3917                 if (f2fs_block_unit_discard(sbi))
3918                         sm_i->dcc_info->discard_granularity = 1;
3919                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3920         }
3921
3922         sbi->readdir_ra = 1;
3923 }
3924
3925 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3926 {
3927         struct f2fs_sb_info *sbi;
3928         struct f2fs_super_block *raw_super;
3929         struct inode *root;
3930         int err;
3931         bool skip_recovery = false, need_fsck = false;
3932         char *options = NULL;
3933         int recovery, i, valid_super_block;
3934         struct curseg_info *seg_i;
3935         int retry_cnt = 1;
3936
3937 try_onemore:
3938         err = -EINVAL;
3939         raw_super = NULL;
3940         valid_super_block = -1;
3941         recovery = 0;
3942
3943         /* allocate memory for f2fs-specific super block info */
3944         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3945         if (!sbi)
3946                 return -ENOMEM;
3947
3948         sbi->sb = sb;
3949
3950         /* Load the checksum driver */
3951         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3952         if (IS_ERR(sbi->s_chksum_driver)) {
3953                 f2fs_err(sbi, "Cannot load crc32 driver.");
3954                 err = PTR_ERR(sbi->s_chksum_driver);
3955                 sbi->s_chksum_driver = NULL;
3956                 goto free_sbi;
3957         }
3958
3959         /* set a block size */
3960         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3961                 f2fs_err(sbi, "unable to set blocksize");
3962                 goto free_sbi;
3963         }
3964
3965         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3966                                                                 &recovery);
3967         if (err)
3968                 goto free_sbi;
3969
3970         sb->s_fs_info = sbi;
3971         sbi->raw_super = raw_super;
3972
3973         /* precompute checksum seed for metadata */
3974         if (f2fs_sb_has_inode_chksum(sbi))
3975                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3976                                                 sizeof(raw_super->uuid));
3977
3978         default_options(sbi);
3979         /* parse mount options */
3980         options = kstrdup((const char *)data, GFP_KERNEL);
3981         if (data && !options) {
3982                 err = -ENOMEM;
3983                 goto free_sb_buf;
3984         }
3985
3986         err = parse_options(sb, options, false);
3987         if (err)
3988                 goto free_options;
3989
3990         sb->s_maxbytes = max_file_blocks(NULL) <<
3991                                 le32_to_cpu(raw_super->log_blocksize);
3992         sb->s_max_links = F2FS_LINK_MAX;
3993
3994         err = f2fs_setup_casefold(sbi);
3995         if (err)
3996                 goto free_options;
3997
3998 #ifdef CONFIG_QUOTA
3999         sb->dq_op = &f2fs_quota_operations;
4000         sb->s_qcop = &f2fs_quotactl_ops;
4001         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4002
4003         if (f2fs_sb_has_quota_ino(sbi)) {
4004                 for (i = 0; i < MAXQUOTAS; i++) {
4005                         if (f2fs_qf_ino(sbi->sb, i))
4006                                 sbi->nquota_files++;
4007                 }
4008         }
4009 #endif
4010
4011         sb->s_op = &f2fs_sops;
4012 #ifdef CONFIG_FS_ENCRYPTION
4013         sb->s_cop = &f2fs_cryptops;
4014 #endif
4015 #ifdef CONFIG_FS_VERITY
4016         sb->s_vop = &f2fs_verityops;
4017 #endif
4018         sb->s_xattr = f2fs_xattr_handlers;
4019         sb->s_export_op = &f2fs_export_ops;
4020         sb->s_magic = F2FS_SUPER_MAGIC;
4021         sb->s_time_gran = 1;
4022         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4023                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4024         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4025         sb->s_iflags |= SB_I_CGROUPWB;
4026
4027         /* init f2fs-specific super block info */
4028         sbi->valid_super_block = valid_super_block;
4029         init_rwsem(&sbi->gc_lock);
4030         mutex_init(&sbi->writepages);
4031         init_rwsem(&sbi->cp_global_sem);
4032         init_rwsem(&sbi->node_write);
4033         init_rwsem(&sbi->node_change);
4034
4035         /* disallow all the data/node/meta page writes */
4036         set_sbi_flag(sbi, SBI_POR_DOING);
4037         spin_lock_init(&sbi->stat_lock);
4038
4039         for (i = 0; i < NR_PAGE_TYPE; i++) {
4040                 int n = (i == META) ? 1 : NR_TEMP_TYPE;
4041                 int j;
4042
4043                 sbi->write_io[i] =
4044                         f2fs_kmalloc(sbi,
4045                                      array_size(n,
4046                                                 sizeof(struct f2fs_bio_info)),
4047                                      GFP_KERNEL);
4048                 if (!sbi->write_io[i]) {
4049                         err = -ENOMEM;
4050                         goto free_bio_info;
4051                 }
4052
4053                 for (j = HOT; j < n; j++) {
4054                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
4055                         sbi->write_io[i][j].sbi = sbi;
4056                         sbi->write_io[i][j].bio = NULL;
4057                         spin_lock_init(&sbi->write_io[i][j].io_lock);
4058                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
4059                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
4060                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
4061                 }
4062         }
4063
4064         init_rwsem(&sbi->cp_rwsem);
4065         init_rwsem(&sbi->quota_sem);
4066         init_waitqueue_head(&sbi->cp_wait);
4067         init_sb_info(sbi);
4068
4069         err = f2fs_init_iostat(sbi);
4070         if (err)
4071                 goto free_bio_info;
4072
4073         err = init_percpu_info(sbi);
4074         if (err)
4075                 goto free_iostat;
4076
4077         if (F2FS_IO_ALIGNED(sbi)) {
4078                 sbi->write_io_dummy =
4079                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4080                 if (!sbi->write_io_dummy) {
4081                         err = -ENOMEM;
4082                         goto free_percpu;
4083                 }
4084         }
4085
4086         /* init per sbi slab cache */
4087         err = f2fs_init_xattr_caches(sbi);
4088         if (err)
4089                 goto free_io_dummy;
4090         err = f2fs_init_page_array_cache(sbi);
4091         if (err)
4092                 goto free_xattr_cache;
4093
4094         /* get an inode for meta space */
4095         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4096         if (IS_ERR(sbi->meta_inode)) {
4097                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4098                 err = PTR_ERR(sbi->meta_inode);
4099                 goto free_page_array_cache;
4100         }
4101
4102         err = f2fs_get_valid_checkpoint(sbi);
4103         if (err) {
4104                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4105                 goto free_meta_inode;
4106         }
4107
4108         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4109                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4110         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4111                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4112                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4113         }
4114
4115         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4116                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4117
4118         /* Initialize device list */
4119         err = f2fs_scan_devices(sbi);
4120         if (err) {
4121                 f2fs_err(sbi, "Failed to find devices");
4122                 goto free_devices;
4123         }
4124
4125         err = f2fs_init_post_read_wq(sbi);
4126         if (err) {
4127                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4128                 goto free_devices;
4129         }
4130
4131         sbi->total_valid_node_count =
4132                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4133         percpu_counter_set(&sbi->total_valid_inode_count,
4134                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4135         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4136         sbi->total_valid_block_count =
4137                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4138         sbi->last_valid_block_count = sbi->total_valid_block_count;
4139         sbi->reserved_blocks = 0;
4140         sbi->current_reserved_blocks = 0;
4141         limit_reserve_root(sbi);
4142         adjust_unusable_cap_perc(sbi);
4143
4144         for (i = 0; i < NR_INODE_TYPE; i++) {
4145                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4146                 spin_lock_init(&sbi->inode_lock[i]);
4147         }
4148         mutex_init(&sbi->flush_lock);
4149
4150         f2fs_init_extent_cache_info(sbi);
4151
4152         f2fs_init_ino_entry_info(sbi);
4153
4154         f2fs_init_fsync_node_info(sbi);
4155
4156         /* setup checkpoint request control and start checkpoint issue thread */
4157         f2fs_init_ckpt_req_control(sbi);
4158         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4159                         test_opt(sbi, MERGE_CHECKPOINT)) {
4160                 err = f2fs_start_ckpt_thread(sbi);
4161                 if (err) {
4162                         f2fs_err(sbi,
4163                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4164                             err);
4165                         goto stop_ckpt_thread;
4166                 }
4167         }
4168
4169         /* setup f2fs internal modules */
4170         err = f2fs_build_segment_manager(sbi);
4171         if (err) {
4172                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4173                          err);
4174                 goto free_sm;
4175         }
4176         err = f2fs_build_node_manager(sbi);
4177         if (err) {
4178                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4179                          err);
4180                 goto free_nm;
4181         }
4182
4183         /* For write statistics */
4184         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4185
4186         /* Read accumulated write IO statistics if exists */
4187         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4188         if (__exist_node_summaries(sbi))
4189                 sbi->kbytes_written =
4190                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4191
4192         f2fs_build_gc_manager(sbi);
4193
4194         err = f2fs_build_stats(sbi);
4195         if (err)
4196                 goto free_nm;
4197
4198         /* get an inode for node space */
4199         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4200         if (IS_ERR(sbi->node_inode)) {
4201                 f2fs_err(sbi, "Failed to read node inode");
4202                 err = PTR_ERR(sbi->node_inode);
4203                 goto free_stats;
4204         }
4205
4206         /* read root inode and dentry */
4207         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4208         if (IS_ERR(root)) {
4209                 f2fs_err(sbi, "Failed to read root inode");
4210                 err = PTR_ERR(root);
4211                 goto free_node_inode;
4212         }
4213         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4214                         !root->i_size || !root->i_nlink) {
4215                 iput(root);
4216                 err = -EINVAL;
4217                 goto free_node_inode;
4218         }
4219
4220         sb->s_root = d_make_root(root); /* allocate root dentry */
4221         if (!sb->s_root) {
4222                 err = -ENOMEM;
4223                 goto free_node_inode;
4224         }
4225
4226         err = f2fs_init_compress_inode(sbi);
4227         if (err)
4228                 goto free_root_inode;
4229
4230         err = f2fs_register_sysfs(sbi);
4231         if (err)
4232                 goto free_compress_inode;
4233
4234 #ifdef CONFIG_QUOTA
4235         /* Enable quota usage during mount */
4236         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4237                 err = f2fs_enable_quotas(sb);
4238                 if (err)
4239                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4240         }
4241 #endif
4242         /* if there are any orphan inodes, free them */
4243         err = f2fs_recover_orphan_inodes(sbi);
4244         if (err)
4245                 goto free_meta;
4246
4247         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4248                 goto reset_checkpoint;
4249
4250         /* recover fsynced data */
4251         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4252                         !test_opt(sbi, NORECOVERY)) {
4253                 /*
4254                  * mount should be failed, when device has readonly mode, and
4255                  * previous checkpoint was not done by clean system shutdown.
4256                  */
4257                 if (f2fs_hw_is_readonly(sbi)) {
4258                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4259                                 err = f2fs_recover_fsync_data(sbi, true);
4260                                 if (err > 0) {
4261                                         err = -EROFS;
4262                                         f2fs_err(sbi, "Need to recover fsync data, but "
4263                                                 "write access unavailable, please try "
4264                                                 "mount w/ disable_roll_forward or norecovery");
4265                                 }
4266                                 if (err < 0)
4267                                         goto free_meta;
4268                         }
4269                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4270                         goto reset_checkpoint;
4271                 }
4272
4273                 if (need_fsck)
4274                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4275
4276                 if (skip_recovery)
4277                         goto reset_checkpoint;
4278
4279                 err = f2fs_recover_fsync_data(sbi, false);
4280                 if (err < 0) {
4281                         if (err != -ENOMEM)
4282                                 skip_recovery = true;
4283                         need_fsck = true;
4284                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4285                                  err);
4286                         goto free_meta;
4287                 }
4288         } else {
4289                 err = f2fs_recover_fsync_data(sbi, true);
4290
4291                 if (!f2fs_readonly(sb) && err > 0) {
4292                         err = -EINVAL;
4293                         f2fs_err(sbi, "Need to recover fsync data");
4294                         goto free_meta;
4295                 }
4296         }
4297
4298         /*
4299          * If the f2fs is not readonly and fsync data recovery succeeds,
4300          * check zoned block devices' write pointer consistency.
4301          */
4302         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4303                 err = f2fs_check_write_pointer(sbi);
4304                 if (err)
4305                         goto free_meta;
4306         }
4307
4308 reset_checkpoint:
4309         f2fs_init_inmem_curseg(sbi);
4310
4311         /* f2fs_recover_fsync_data() cleared this already */
4312         clear_sbi_flag(sbi, SBI_POR_DOING);
4313
4314         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4315                 err = f2fs_disable_checkpoint(sbi);
4316                 if (err)
4317                         goto sync_free_meta;
4318         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4319                 f2fs_enable_checkpoint(sbi);
4320         }
4321
4322         /*
4323          * If filesystem is not mounted as read-only then
4324          * do start the gc_thread.
4325          */
4326         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4327                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4328                 /* After POR, we can run background GC thread.*/
4329                 err = f2fs_start_gc_thread(sbi);
4330                 if (err)
4331                         goto sync_free_meta;
4332         }
4333         kvfree(options);
4334
4335         /* recover broken superblock */
4336         if (recovery) {
4337                 err = f2fs_commit_super(sbi, true);
4338                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4339                           sbi->valid_super_block ? 1 : 2, err);
4340         }
4341
4342         f2fs_join_shrinker(sbi);
4343
4344         f2fs_tuning_parameters(sbi);
4345
4346         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4347                     cur_cp_version(F2FS_CKPT(sbi)));
4348         f2fs_update_time(sbi, CP_TIME);
4349         f2fs_update_time(sbi, REQ_TIME);
4350         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4351         return 0;
4352
4353 sync_free_meta:
4354         /* safe to flush all the data */
4355         sync_filesystem(sbi->sb);
4356         retry_cnt = 0;
4357
4358 free_meta:
4359 #ifdef CONFIG_QUOTA
4360         f2fs_truncate_quota_inode_pages(sb);
4361         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4362                 f2fs_quota_off_umount(sbi->sb);
4363 #endif
4364         /*
4365          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4366          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4367          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4368          * falls into an infinite loop in f2fs_sync_meta_pages().
4369          */
4370         truncate_inode_pages_final(META_MAPPING(sbi));
4371         /* evict some inodes being cached by GC */
4372         evict_inodes(sb);
4373         f2fs_unregister_sysfs(sbi);
4374 free_compress_inode:
4375         f2fs_destroy_compress_inode(sbi);
4376 free_root_inode:
4377         dput(sb->s_root);
4378         sb->s_root = NULL;
4379 free_node_inode:
4380         f2fs_release_ino_entry(sbi, true);
4381         truncate_inode_pages_final(NODE_MAPPING(sbi));
4382         iput(sbi->node_inode);
4383         sbi->node_inode = NULL;
4384 free_stats:
4385         f2fs_destroy_stats(sbi);
4386 free_nm:
4387         /* stop discard thread before destroying node manager */
4388         f2fs_stop_discard_thread(sbi);
4389         f2fs_destroy_node_manager(sbi);
4390 free_sm:
4391         f2fs_destroy_segment_manager(sbi);
4392         f2fs_destroy_post_read_wq(sbi);
4393 stop_ckpt_thread:
4394         f2fs_stop_ckpt_thread(sbi);
4395 free_devices:
4396         destroy_device_list(sbi);
4397         kvfree(sbi->ckpt);
4398 free_meta_inode:
4399         make_bad_inode(sbi->meta_inode);
4400         iput(sbi->meta_inode);
4401         sbi->meta_inode = NULL;
4402 free_page_array_cache:
4403         f2fs_destroy_page_array_cache(sbi);
4404 free_xattr_cache:
4405         f2fs_destroy_xattr_caches(sbi);
4406 free_io_dummy:
4407         mempool_destroy(sbi->write_io_dummy);
4408 free_percpu:
4409         destroy_percpu_info(sbi);
4410 free_iostat:
4411         f2fs_destroy_iostat(sbi);
4412 free_bio_info:
4413         for (i = 0; i < NR_PAGE_TYPE; i++)
4414                 kvfree(sbi->write_io[i]);
4415
4416 #ifdef CONFIG_UNICODE
4417         utf8_unload(sb->s_encoding);
4418         sb->s_encoding = NULL;
4419 #endif
4420 free_options:
4421 #ifdef CONFIG_QUOTA
4422         for (i = 0; i < MAXQUOTAS; i++)
4423                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4424 #endif
4425         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4426         kvfree(options);
4427 free_sb_buf:
4428         kfree(raw_super);
4429 free_sbi:
4430         if (sbi->s_chksum_driver)
4431                 crypto_free_shash(sbi->s_chksum_driver);
4432         kfree(sbi);
4433
4434         /* give only one another chance */
4435         if (retry_cnt > 0 && skip_recovery) {
4436                 retry_cnt--;
4437                 shrink_dcache_sb(sb);
4438                 goto try_onemore;
4439         }
4440         return err;
4441 }
4442
4443 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4444                         const char *dev_name, void *data)
4445 {
4446         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4447 }
4448
4449 static void kill_f2fs_super(struct super_block *sb)
4450 {
4451         if (sb->s_root) {
4452                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4453
4454                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4455                 f2fs_stop_gc_thread(sbi);
4456                 f2fs_stop_discard_thread(sbi);
4457
4458 #ifdef CONFIG_F2FS_FS_COMPRESSION
4459                 /*
4460                  * latter evict_inode() can bypass checking and invalidating
4461                  * compress inode cache.
4462                  */
4463                 if (test_opt(sbi, COMPRESS_CACHE))
4464                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4465 #endif
4466
4467                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4468                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4469                         struct cp_control cpc = {
4470                                 .reason = CP_UMOUNT,
4471                         };
4472                         f2fs_write_checkpoint(sbi, &cpc);
4473                 }
4474
4475                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4476                         sb->s_flags &= ~SB_RDONLY;
4477         }
4478         kill_block_super(sb);
4479 }
4480
4481 static struct file_system_type f2fs_fs_type = {
4482         .owner          = THIS_MODULE,
4483         .name           = "f2fs",
4484         .mount          = f2fs_mount,
4485         .kill_sb        = kill_f2fs_super,
4486         .fs_flags       = FS_REQUIRES_DEV,
4487 };
4488 MODULE_ALIAS_FS("f2fs");
4489
4490 static int __init init_inodecache(void)
4491 {
4492         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4493                         sizeof(struct f2fs_inode_info), 0,
4494                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4495         if (!f2fs_inode_cachep)
4496                 return -ENOMEM;
4497         return 0;
4498 }
4499
4500 static void destroy_inodecache(void)
4501 {
4502         /*
4503          * Make sure all delayed rcu free inodes are flushed before we
4504          * destroy cache.
4505          */
4506         rcu_barrier();
4507         kmem_cache_destroy(f2fs_inode_cachep);
4508 }
4509
4510 static int __init init_f2fs_fs(void)
4511 {
4512         int err;
4513
4514         if (PAGE_SIZE != F2FS_BLKSIZE) {
4515                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4516                                 PAGE_SIZE, F2FS_BLKSIZE);
4517                 return -EINVAL;
4518         }
4519
4520         err = init_inodecache();
4521         if (err)
4522                 goto fail;
4523         err = f2fs_create_node_manager_caches();
4524         if (err)
4525                 goto free_inodecache;
4526         err = f2fs_create_segment_manager_caches();
4527         if (err)
4528                 goto free_node_manager_caches;
4529         err = f2fs_create_checkpoint_caches();
4530         if (err)
4531                 goto free_segment_manager_caches;
4532         err = f2fs_create_recovery_cache();
4533         if (err)
4534                 goto free_checkpoint_caches;
4535         err = f2fs_create_extent_cache();
4536         if (err)
4537                 goto free_recovery_cache;
4538         err = f2fs_create_garbage_collection_cache();
4539         if (err)
4540                 goto free_extent_cache;
4541         err = f2fs_init_sysfs();
4542         if (err)
4543                 goto free_garbage_collection_cache;
4544         err = register_shrinker(&f2fs_shrinker_info);
4545         if (err)
4546                 goto free_sysfs;
4547         err = register_filesystem(&f2fs_fs_type);
4548         if (err)
4549                 goto free_shrinker;
4550         f2fs_create_root_stats();
4551         err = f2fs_init_post_read_processing();
4552         if (err)
4553                 goto free_root_stats;
4554         err = f2fs_init_iostat_processing();
4555         if (err)
4556                 goto free_post_read;
4557         err = f2fs_init_bio_entry_cache();
4558         if (err)
4559                 goto free_iostat;
4560         err = f2fs_init_bioset();
4561         if (err)
4562                 goto free_bio_enrty_cache;
4563         err = f2fs_init_compress_mempool();
4564         if (err)
4565                 goto free_bioset;
4566         err = f2fs_init_compress_cache();
4567         if (err)
4568                 goto free_compress_mempool;
4569         err = f2fs_create_casefold_cache();
4570         if (err)
4571                 goto free_compress_cache;
4572         return 0;
4573 free_compress_cache:
4574         f2fs_destroy_compress_cache();
4575 free_compress_mempool:
4576         f2fs_destroy_compress_mempool();
4577 free_bioset:
4578         f2fs_destroy_bioset();
4579 free_bio_enrty_cache:
4580         f2fs_destroy_bio_entry_cache();
4581 free_iostat:
4582         f2fs_destroy_iostat_processing();
4583 free_post_read:
4584         f2fs_destroy_post_read_processing();
4585 free_root_stats:
4586         f2fs_destroy_root_stats();
4587         unregister_filesystem(&f2fs_fs_type);
4588 free_shrinker:
4589         unregister_shrinker(&f2fs_shrinker_info);
4590 free_sysfs:
4591         f2fs_exit_sysfs();
4592 free_garbage_collection_cache:
4593         f2fs_destroy_garbage_collection_cache();
4594 free_extent_cache:
4595         f2fs_destroy_extent_cache();
4596 free_recovery_cache:
4597         f2fs_destroy_recovery_cache();
4598 free_checkpoint_caches:
4599         f2fs_destroy_checkpoint_caches();
4600 free_segment_manager_caches:
4601         f2fs_destroy_segment_manager_caches();
4602 free_node_manager_caches:
4603         f2fs_destroy_node_manager_caches();
4604 free_inodecache:
4605         destroy_inodecache();
4606 fail:
4607         return err;
4608 }
4609
4610 static void __exit exit_f2fs_fs(void)
4611 {
4612         f2fs_destroy_casefold_cache();
4613         f2fs_destroy_compress_cache();
4614         f2fs_destroy_compress_mempool();
4615         f2fs_destroy_bioset();
4616         f2fs_destroy_bio_entry_cache();
4617         f2fs_destroy_iostat_processing();
4618         f2fs_destroy_post_read_processing();
4619         f2fs_destroy_root_stats();
4620         unregister_filesystem(&f2fs_fs_type);
4621         unregister_shrinker(&f2fs_shrinker_info);
4622         f2fs_exit_sysfs();
4623         f2fs_destroy_garbage_collection_cache();
4624         f2fs_destroy_extent_cache();
4625         f2fs_destroy_recovery_cache();
4626         f2fs_destroy_checkpoint_caches();
4627         f2fs_destroy_segment_manager_caches();
4628         f2fs_destroy_node_manager_caches();
4629         destroy_inodecache();
4630 }
4631
4632 module_init(init_f2fs_fs)
4633 module_exit(exit_f2fs_fs)
4634
4635 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4636 MODULE_DESCRIPTION("Flash Friendly File System");
4637 MODULE_LICENSE("GPL");
4638 MODULE_SOFTDEP("pre: crc32");
4639