fs/f2fs/super.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/super.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/fs.h>
  11 #include <linux/statfs.h>
  12 #include <linux/buffer_head.h>
  13 #include <linux/backing-dev.h>
  14 #include <linux/kthread.h>
  15 #include <linux/parser.h>
  16 #include <linux/mount.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/random.h>
  20 #include <linux/exportfs.h>
  21 #include <linux/blkdev.h>
  22 #include <linux/quotaops.h>
  23 #include <linux/f2fs_fs.h>
  24 #include <linux/sysfs.h>
  25 #include <linux/quota.h>
  26 #include <linux/unicode.h>
  27 #include <linux/part_stat.h>
  28 #include <linux/zstd.h>
  29 #include <linux/lz4.h>
  30
  31 #include "f2fs.h"
  32 #include "node.h"
  33 #include "segment.h"
  34 #include "xattr.h"
  35 #include "gc.h"
  36
  37 #define CREATE_TRACE_POINTS
  38 #include <trace/events/f2fs.h>
  39
  40 static struct kmem_cache *f2fs_inode_cachep;
  41
  42 #ifdef CONFIG_F2FS_FAULT_INJECTION
  43
  44 const char *f2fs_fault_name[FAULT_MAX] = {
  45         [FAULT_KMALLOC]         = "kmalloc",
  46         [FAULT_KVMALLOC]        = "kvmalloc",
  47         [FAULT_PAGE_ALLOC]      = "page alloc",
  48         [FAULT_PAGE_GET]        = "page get",
  49         [FAULT_ALLOC_NID]       = "alloc nid",
  50         [FAULT_ORPHAN]          = "orphan",
  51         [FAULT_BLOCK]           = "no more block",
  52         [FAULT_DIR_DEPTH]       = "too big dir depth",
  53         [FAULT_EVICT_INODE]     = "evict_inode fail",
  54         [FAULT_TRUNCATE]        = "truncate fail",
  55         [FAULT_READ_IO]         = "read IO error",
  56         [FAULT_CHECKPOINT]      = "checkpoint error",
  57         [FAULT_DISCARD]         = "discard error",
  58         [FAULT_WRITE_IO]        = "write IO error",
  59 };
  60
  61 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  62                                                         unsigned int type)
  63 {
  64         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  65
  66         if (rate) {
  67                 atomic_set(&ffi->inject_ops, 0);
  68                 ffi->inject_rate = rate;
  69         }
  70
  71         if (type)
  72                 ffi->inject_type = type;
  73
  74         if (!rate && !type)
  75                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  76 }
  77 #endif
  78
  79 /* f2fs-wide shrinker description */
  80 static struct shrinker f2fs_shrinker_info = {
  81         .scan_objects = f2fs_shrink_scan,
  82         .count_objects = f2fs_shrink_count,
  83         .seeks = DEFAULT_SEEKS,
  84 };
  85
  86 enum {
  87         Opt_gc_background,
  88         Opt_disable_roll_forward,
  89         Opt_norecovery,
  90         Opt_discard,
  91         Opt_nodiscard,
  92         Opt_noheap,
  93         Opt_heap,
  94         Opt_user_xattr,
  95         Opt_nouser_xattr,
  96         Opt_acl,
  97         Opt_noacl,
  98         Opt_active_logs,
  99         Opt_disable_ext_identify,
 100         Opt_inline_xattr,
 101         Opt_noinline_xattr,
 102         Opt_inline_xattr_size,
 103         Opt_inline_data,
 104         Opt_inline_dentry,
 105         Opt_noinline_dentry,
 106         Opt_flush_merge,
 107         Opt_noflush_merge,
 108         Opt_nobarrier,
 109         Opt_fastboot,
 110         Opt_extent_cache,
 111         Opt_noextent_cache,
 112         Opt_noinline_data,
 113         Opt_data_flush,
 114         Opt_reserve_root,
 115         Opt_resgid,
 116         Opt_resuid,
 117         Opt_mode,
 118         Opt_io_size_bits,
 119         Opt_fault_injection,
 120         Opt_fault_type,
 121         Opt_lazytime,
 122         Opt_nolazytime,
 123         Opt_quota,
 124         Opt_noquota,
 125         Opt_usrquota,
 126         Opt_grpquota,
 127         Opt_prjquota,
 128         Opt_usrjquota,
 129         Opt_grpjquota,
 130         Opt_prjjquota,
 131         Opt_offusrjquota,
 132         Opt_offgrpjquota,
 133         Opt_offprjjquota,
 134         Opt_jqfmt_vfsold,
 135         Opt_jqfmt_vfsv0,
 136         Opt_jqfmt_vfsv1,
 137         Opt_whint,
 138         Opt_alloc,
 139         Opt_fsync,
 140         Opt_test_dummy_encryption,
 141         Opt_inlinecrypt,
 142         Opt_checkpoint_disable,
 143         Opt_checkpoint_disable_cap,
 144         Opt_checkpoint_disable_cap_perc,
 145         Opt_checkpoint_enable,
 146         Opt_checkpoint_merge,
 147         Opt_nocheckpoint_merge,
 148         Opt_compress_algorithm,
 149         Opt_compress_log_size,
 150         Opt_compress_extension,
 151         Opt_nocompress_extension,
 152         Opt_compress_chksum,
 153         Opt_compress_mode,
 154         Opt_compress_cache,
 155         Opt_atgc,
 156         Opt_gc_merge,
 157         Opt_nogc_merge,
 158         Opt_err,
 159 };
 160
 161 static match_table_t f2fs_tokens = {
 162         {Opt_gc_background, "background_gc=%s"},
 163         {Opt_disable_roll_forward, "disable_roll_forward"},
 164         {Opt_norecovery, "norecovery"},
 165         {Opt_discard, "discard"},
 166         {Opt_nodiscard, "nodiscard"},
 167         {Opt_noheap, "no_heap"},
 168         {Opt_heap, "heap"},
 169         {Opt_user_xattr, "user_xattr"},
 170         {Opt_nouser_xattr, "nouser_xattr"},
 171         {Opt_acl, "acl"},
 172         {Opt_noacl, "noacl"},
 173         {Opt_active_logs, "active_logs=%u"},
 174         {Opt_disable_ext_identify, "disable_ext_identify"},
 175         {Opt_inline_xattr, "inline_xattr"},
 176         {Opt_noinline_xattr, "noinline_xattr"},
 177         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 178         {Opt_inline_data, "inline_data"},
 179         {Opt_inline_dentry, "inline_dentry"},
 180         {Opt_noinline_dentry, "noinline_dentry"},
 181         {Opt_flush_merge, "flush_merge"},
 182         {Opt_noflush_merge, "noflush_merge"},
 183         {Opt_nobarrier, "nobarrier"},
 184         {Opt_fastboot, "fastboot"},
 185         {Opt_extent_cache, "extent_cache"},
 186         {Opt_noextent_cache, "noextent_cache"},
 187         {Opt_noinline_data, "noinline_data"},
 188         {Opt_data_flush, "data_flush"},
 189         {Opt_reserve_root, "reserve_root=%u"},
 190         {Opt_resgid, "resgid=%u"},
 191         {Opt_resuid, "resuid=%u"},
 192         {Opt_mode, "mode=%s"},
 193         {Opt_io_size_bits, "io_bits=%u"},
 194         {Opt_fault_injection, "fault_injection=%u"},
 195         {Opt_fault_type, "fault_type=%u"},
 196         {Opt_lazytime, "lazytime"},
 197         {Opt_nolazytime, "nolazytime"},
 198         {Opt_quota, "quota"},
 199         {Opt_noquota, "noquota"},
 200         {Opt_usrquota, "usrquota"},
 201         {Opt_grpquota, "grpquota"},
 202         {Opt_prjquota, "prjquota"},
 203         {Opt_usrjquota, "usrjquota=%s"},
 204         {Opt_grpjquota, "grpjquota=%s"},
 205         {Opt_prjjquota, "prjjquota=%s"},
 206         {Opt_offusrjquota, "usrjquota="},
 207         {Opt_offgrpjquota, "grpjquota="},
 208         {Opt_offprjjquota, "prjjquota="},
 209         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 210         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 211         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 212         {Opt_whint, "whint_mode=%s"},
 213         {Opt_alloc, "alloc_mode=%s"},
 214         {Opt_fsync, "fsync_mode=%s"},
 215         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 216         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 217         {Opt_inlinecrypt, "inlinecrypt"},
 218         {Opt_checkpoint_disable, "checkpoint=disable"},
 219         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 220         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 221         {Opt_checkpoint_enable, "checkpoint=enable"},
 222         {Opt_checkpoint_merge, "checkpoint_merge"},
 223         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 224         {Opt_compress_algorithm, "compress_algorithm=%s"},
 225         {Opt_compress_log_size, "compress_log_size=%u"},
 226         {Opt_compress_extension, "compress_extension=%s"},
 227         {Opt_nocompress_extension, "nocompress_extension=%s"},
 228         {Opt_compress_chksum, "compress_chksum"},
 229         {Opt_compress_mode, "compress_mode=%s"},
 230         {Opt_compress_cache, "compress_cache"},
 231         {Opt_atgc, "atgc"},
 232         {Opt_gc_merge, "gc_merge"},
 233         {Opt_nogc_merge, "nogc_merge"},
 234         {Opt_err, NULL},
 235 };
 236
 237 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 238 {
 239         struct va_format vaf;
 240         va_list args;
 241         int level;
 242
 243         va_start(args, fmt);
 244
 245         level = printk_get_level(fmt);
 246         vaf.fmt = printk_skip_level(fmt);
 247         vaf.va = &args;
 248         printk("%c%cF2FS-fs (%s): %pV\n",
 249                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 250
 251         va_end(args);
 252 }
 253
 254 #ifdef CONFIG_UNICODE
 255 static const struct f2fs_sb_encodings {
 256         __u16 magic;
 257         char *name;
 258         char *version;
 259 } f2fs_sb_encoding_map[] = {
 260         {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
 261 };
 262
 263 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
 264                                  const struct f2fs_sb_encodings **encoding,
 265                                  __u16 *flags)
 266 {
 267         __u16 magic = le16_to_cpu(sb->s_encoding);
 268         int i;
 269
 270         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 271                 if (magic == f2fs_sb_encoding_map[i].magic)
 272                         break;
 273
 274         if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
 275                 return -EINVAL;
 276
 277         *encoding = &f2fs_sb_encoding_map[i];
 278         *flags = le16_to_cpu(sb->s_encoding_flags);
 279
 280         return 0;
 281 }
 282
 283 struct kmem_cache *f2fs_cf_name_slab;
 284 static int __init f2fs_create_casefold_cache(void)
 285 {
 286         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 287                                                         F2FS_NAME_LEN);
 288         if (!f2fs_cf_name_slab)
 289                 return -ENOMEM;
 290         return 0;
 291 }
 292
 293 static void f2fs_destroy_casefold_cache(void)
 294 {
 295         kmem_cache_destroy(f2fs_cf_name_slab);
 296 }
 297 #else
 298 static int __init f2fs_create_casefold_cache(void) { return 0; }
 299 static void f2fs_destroy_casefold_cache(void) { }
 300 #endif
 301
 302 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 303 {
 304         block_t limit = min((sbi->user_block_count << 1) / 1000,
 305                         sbi->user_block_count - sbi->reserved_blocks);
 306
 307         /* limit is 0.2% */
 308         if (test_opt(sbi, RESERVE_ROOT) &&
 309                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 310                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 311                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 312                           F2FS_OPTION(sbi).root_reserved_blocks);
 313         }
 314         if (!test_opt(sbi, RESERVE_ROOT) &&
 315                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 316                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 317                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 318                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 319                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 320                           from_kuid_munged(&init_user_ns,
 321                                            F2FS_OPTION(sbi).s_resuid),
 322                           from_kgid_munged(&init_user_ns,
 323                                            F2FS_OPTION(sbi).s_resgid));
 324 }
 325
 326 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 327 {
 328         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 329                 return;
 330
 331         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 332                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 333         else
 334                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 335                                         F2FS_OPTION(sbi).unusable_cap_perc;
 336
 337         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 338                         F2FS_OPTION(sbi).unusable_cap,
 339                         F2FS_OPTION(sbi).unusable_cap_perc);
 340 }
 341
 342 static void init_once(void *foo)
 343 {
 344         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 345
 346         inode_init_once(&fi->vfs_inode);
 347 }
 348
 349 #ifdef CONFIG_QUOTA
 350 static const char * const quotatypes[] = INITQFNAMES;
 351 #define QTYPE2NAME(t) (quotatypes[t])
 352 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 353                                                         substring_t *args)
 354 {
 355         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 356         char *qname;
 357         int ret = -EINVAL;
 358
 359         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 360                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 361                 return -EINVAL;
 362         }
 363         if (f2fs_sb_has_quota_ino(sbi)) {
 364                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 365                 return 0;
 366         }
 367
 368         qname = match_strdup(args);
 369         if (!qname) {
 370                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 371                 return -ENOMEM;
 372         }
 373         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 374                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 375                         ret = 0;
 376                 else
 377                         f2fs_err(sbi, "%s quota file already specified",
 378                                  QTYPE2NAME(qtype));
 379                 goto errout;
 380         }
 381         if (strchr(qname, '/')) {
 382                 f2fs_err(sbi, "quotafile must be on filesystem root");
 383                 goto errout;
 384         }
 385         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 386         set_opt(sbi, QUOTA);
 387         return 0;
 388 errout:
 389         kfree(qname);
 390         return ret;
 391 }
 392
 393 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 394 {
 395         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 396
 397         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 398                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 399                 return -EINVAL;
 400         }
 401         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 402         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 403         return 0;
 404 }
 405
 406 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 407 {
 408         /*
 409          * We do the test below only for project quotas. 'usrquota' and
 410          * 'grpquota' mount options are allowed even without quota feature
 411          * to support legacy quotas in quota files.
 412          */
 413         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 414                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 415                 return -1;
 416         }
 417         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 418                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 419                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 420                 if (test_opt(sbi, USRQUOTA) &&
 421                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 422                         clear_opt(sbi, USRQUOTA);
 423
 424                 if (test_opt(sbi, GRPQUOTA) &&
 425                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 426                         clear_opt(sbi, GRPQUOTA);
 427
 428                 if (test_opt(sbi, PRJQUOTA) &&
 429                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 430                         clear_opt(sbi, PRJQUOTA);
 431
 432                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 433                                 test_opt(sbi, PRJQUOTA)) {
 434                         f2fs_err(sbi, "old and new quota format mixing");
 435                         return -1;
 436                 }
 437
 438                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 439                         f2fs_err(sbi, "journaled quota format not specified");
 440                         return -1;
 441                 }
 442         }
 443
 444         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 445                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 446                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 447         }
 448         return 0;
 449 }
 450 #endif
 451
 452 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 453                                           const char *opt,
 454                                           const substring_t *arg,
 455                                           bool is_remount)
 456 {
 457         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 458 #ifdef CONFIG_FS_ENCRYPTION
 459         int err;
 460
 461         if (!f2fs_sb_has_encrypt(sbi)) {
 462                 f2fs_err(sbi, "Encrypt feature is off");
 463                 return -EINVAL;
 464         }
 465
 466         /*
 467          * This mount option is just for testing, and it's not worthwhile to
 468          * implement the extra complexity (e.g. RCU protection) that would be
 469          * needed to allow it to be set or changed during remount.  We do allow
 470          * it to be specified during remount, but only if there is no change.
 471          */
 472         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 473                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 474                 return -EINVAL;
 475         }
 476         err = fscrypt_set_test_dummy_encryption(
 477                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 478         if (err) {
 479                 if (err == -EEXIST)
 480                         f2fs_warn(sbi,
 481                                   "Can't change test_dummy_encryption on remount");
 482                 else if (err == -EINVAL)
 483                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 484                                   opt);
 485                 else
 486                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 487                                   opt, err);
 488                 return -EINVAL;
 489         }
 490         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 491 #else
 492         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 493 #endif
 494         return 0;
 495 }
 496
 497 #ifdef CONFIG_F2FS_FS_COMPRESSION
 498 /*
 499  * 1. The same extension name cannot not appear in both compress and non-compress extension
 500  * at the same time.
 501  * 2. If the compress extension specifies all files, the types specified by the non-compress
 502  * extension will be treated as special cases and will not be compressed.
 503  * 3. Don't allow the non-compress extension specifies all files.
 504  */
 505 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 506 {
 507         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 508         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 509         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 510
 511         ext = F2FS_OPTION(sbi).extensions;
 512         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 513         noext = F2FS_OPTION(sbi).noextensions;
 514         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 515
 516         if (!noext_cnt)
 517                 return 0;
 518
 519         for (no_index = 0; no_index < noext_cnt; no_index++) {
 520                 if (!strcasecmp("*", noext[no_index])) {
 521                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 522                         return -EINVAL;
 523                 }
 524                 for (index = 0; index < ext_cnt; index++) {
 525                         if (!strcasecmp(ext[index], noext[no_index])) {
 526                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 527                                                 ext[index]);
 528                                 return -EINVAL;
 529                         }
 530                 }
 531         }
 532         return 0;
 533 }
 534
 535 #ifdef CONFIG_F2FS_FS_LZ4
 536 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 537 {
 538 #ifdef CONFIG_F2FS_FS_LZ4HC
 539         unsigned int level;
 540 #endif
 541
 542         if (strlen(str) == 3) {
 543                 F2FS_OPTION(sbi).compress_level = 0;
 544                 return 0;
 545         }
 546
 547 #ifdef CONFIG_F2FS_FS_LZ4HC
 548         str += 3;
 549
 550         if (str[0] != ':') {
 551                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 552                 return -EINVAL;
 553         }
 554         if (kstrtouint(str + 1, 10, &level))
 555                 return -EINVAL;
 556
 557         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 558                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 559                 return -EINVAL;
 560         }
 561
 562         F2FS_OPTION(sbi).compress_level = level;
 563         return 0;
 564 #else
 565         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 566         return -EINVAL;
 567 #endif
 568 }
 569 #endif
 570
 571 #ifdef CONFIG_F2FS_FS_ZSTD
 572 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 573 {
 574         unsigned int level;
 575         int len = 4;
 576
 577         if (strlen(str) == len) {
 578                 F2FS_OPTION(sbi).compress_level = 0;
 579                 return 0;
 580         }
 581
 582         str += len;
 583
 584         if (str[0] != ':') {
 585                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 586                 return -EINVAL;
 587         }
 588         if (kstrtouint(str + 1, 10, &level))
 589                 return -EINVAL;
 590
 591         if (!level || level > ZSTD_maxCLevel()) {
 592                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 593                 return -EINVAL;
 594         }
 595
 596         F2FS_OPTION(sbi).compress_level = level;
 597         return 0;
 598 }
 599 #endif
 600 #endif
 601
 602 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 603 {
 604         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 605         substring_t args[MAX_OPT_ARGS];
 606 #ifdef CONFIG_F2FS_FS_COMPRESSION
 607         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 608         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 609         int ext_cnt, noext_cnt;
 610 #endif
 611         char *p, *name;
 612         int arg = 0;
 613         kuid_t uid;
 614         kgid_t gid;
 615         int ret;
 616
 617         if (!options)
 618                 goto default_check;
 619
 620         while ((p = strsep(&options, ",")) != NULL) {
 621                 int token;
 622
 623                 if (!*p)
 624                         continue;
 625                 /*
 626                  * Initialize args struct so we know whether arg was
 627                  * found; some options take optional arguments.
 628                  */
 629                 args[0].to = args[0].from = NULL;
 630                 token = match_token(p, f2fs_tokens, args);
 631
 632                 switch (token) {
 633                 case Opt_gc_background:
 634                         name = match_strdup(&args[0]);
 635
 636                         if (!name)
 637                                 return -ENOMEM;
 638                         if (!strcmp(name, "on")) {
 639                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 640                         } else if (!strcmp(name, "off")) {
 641                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 642                         } else if (!strcmp(name, "sync")) {
 643                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 644                         } else {
 645                                 kfree(name);
 646                                 return -EINVAL;
 647                         }
 648                         kfree(name);
 649                         break;
 650                 case Opt_disable_roll_forward:
 651                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 652                         break;
 653                 case Opt_norecovery:
 654                         /* this option mounts f2fs with ro */
 655                         set_opt(sbi, NORECOVERY);
 656                         if (!f2fs_readonly(sb))
 657                                 return -EINVAL;
 658                         break;
 659                 case Opt_discard:
 660                         set_opt(sbi, DISCARD);
 661                         break;
 662                 case Opt_nodiscard:
 663                         if (f2fs_sb_has_blkzoned(sbi)) {
 664                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 665                                 return -EINVAL;
 666                         }
 667                         clear_opt(sbi, DISCARD);
 668                         break;
 669                 case Opt_noheap:
 670                         set_opt(sbi, NOHEAP);
 671                         break;
 672                 case Opt_heap:
 673                         clear_opt(sbi, NOHEAP);
 674                         break;
 675 #ifdef CONFIG_F2FS_FS_XATTR
 676                 case Opt_user_xattr:
 677                         set_opt(sbi, XATTR_USER);
 678                         break;
 679                 case Opt_nouser_xattr:
 680                         clear_opt(sbi, XATTR_USER);
 681                         break;
 682                 case Opt_inline_xattr:
 683                         set_opt(sbi, INLINE_XATTR);
 684                         break;
 685                 case Opt_noinline_xattr:
 686                         clear_opt(sbi, INLINE_XATTR);
 687                         break;
 688                 case Opt_inline_xattr_size:
 689                         if (args->from && match_int(args, &arg))
 690                                 return -EINVAL;
 691                         set_opt(sbi, INLINE_XATTR_SIZE);
 692                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 693                         break;
 694 #else
 695                 case Opt_user_xattr:
 696                         f2fs_info(sbi, "user_xattr options not supported");
 697                         break;
 698                 case Opt_nouser_xattr:
 699                         f2fs_info(sbi, "nouser_xattr options not supported");
 700                         break;
 701                 case Opt_inline_xattr:
 702                         f2fs_info(sbi, "inline_xattr options not supported");
 703                         break;
 704                 case Opt_noinline_xattr:
 705                         f2fs_info(sbi, "noinline_xattr options not supported");
 706                         break;
 707 #endif
 708 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 709                 case Opt_acl:
 710                         set_opt(sbi, POSIX_ACL);
 711                         break;
 712                 case Opt_noacl:
 713                         clear_opt(sbi, POSIX_ACL);
 714                         break;
 715 #else
 716                 case Opt_acl:
 717                         f2fs_info(sbi, "acl options not supported");
 718                         break;
 719                 case Opt_noacl:
 720                         f2fs_info(sbi, "noacl options not supported");
 721                         break;
 722 #endif
 723                 case Opt_active_logs:
 724                         if (args->from && match_int(args, &arg))
 725                                 return -EINVAL;
 726                         if (arg != 2 && arg != 4 &&
 727                                 arg != NR_CURSEG_PERSIST_TYPE)
 728                                 return -EINVAL;
 729                         F2FS_OPTION(sbi).active_logs = arg;
 730                         break;
 731                 case Opt_disable_ext_identify:
 732                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 733                         break;
 734                 case Opt_inline_data:
 735                         set_opt(sbi, INLINE_DATA);
 736                         break;
 737                 case Opt_inline_dentry:
 738                         set_opt(sbi, INLINE_DENTRY);
 739                         break;
 740                 case Opt_noinline_dentry:
 741                         clear_opt(sbi, INLINE_DENTRY);
 742                         break;
 743                 case Opt_flush_merge:
 744                         set_opt(sbi, FLUSH_MERGE);
 745                         break;
 746                 case Opt_noflush_merge:
 747                         clear_opt(sbi, FLUSH_MERGE);
 748                         break;
 749                 case Opt_nobarrier:
 750                         set_opt(sbi, NOBARRIER);
 751                         break;
 752                 case Opt_fastboot:
 753                         set_opt(sbi, FASTBOOT);
 754                         break;
 755                 case Opt_extent_cache:
 756                         set_opt(sbi, EXTENT_CACHE);
 757                         break;
 758                 case Opt_noextent_cache:
 759                         clear_opt(sbi, EXTENT_CACHE);
 760                         break;
 761                 case Opt_noinline_data:
 762                         clear_opt(sbi, INLINE_DATA);
 763                         break;
 764                 case Opt_data_flush:
 765                         set_opt(sbi, DATA_FLUSH);
 766                         break;
 767                 case Opt_reserve_root:
 768                         if (args->from && match_int(args, &arg))
 769                                 return -EINVAL;
 770                         if (test_opt(sbi, RESERVE_ROOT)) {
 771                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 772                                           F2FS_OPTION(sbi).root_reserved_blocks);
 773                         } else {
 774                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 775                                 set_opt(sbi, RESERVE_ROOT);
 776                         }
 777                         break;
 778                 case Opt_resuid:
 779                         if (args->from && match_int(args, &arg))
 780                                 return -EINVAL;
 781                         uid = make_kuid(current_user_ns(), arg);
 782                         if (!uid_valid(uid)) {
 783                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 784                                 return -EINVAL;
 785                         }
 786                         F2FS_OPTION(sbi).s_resuid = uid;
 787                         break;
 788                 case Opt_resgid:
 789                         if (args->from && match_int(args, &arg))
 790                                 return -EINVAL;
 791                         gid = make_kgid(current_user_ns(), arg);
 792                         if (!gid_valid(gid)) {
 793                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 794                                 return -EINVAL;
 795                         }
 796                         F2FS_OPTION(sbi).s_resgid = gid;
 797                         break;
 798                 case Opt_mode:
 799                         name = match_strdup(&args[0]);
 800
 801                         if (!name)
 802                                 return -ENOMEM;
 803                         if (!strcmp(name, "adaptive")) {
 804                                 if (f2fs_sb_has_blkzoned(sbi)) {
 805                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 806                                         kfree(name);
 807                                         return -EINVAL;
 808                                 }
 809                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 810                         } else if (!strcmp(name, "lfs")) {
 811                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 812                         } else {
 813                                 kfree(name);
 814                                 return -EINVAL;
 815                         }
 816                         kfree(name);
 817                         break;
 818                 case Opt_io_size_bits:
 819                         if (args->from && match_int(args, &arg))
 820                                 return -EINVAL;
 821                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 822                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 823                                           1 << arg, BIO_MAX_VECS);
 824                                 return -EINVAL;
 825                         }
 826                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 827                         break;
 828 #ifdef CONFIG_F2FS_FAULT_INJECTION
 829                 case Opt_fault_injection:
 830                         if (args->from && match_int(args, &arg))
 831                                 return -EINVAL;
 832                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 833                         set_opt(sbi, FAULT_INJECTION);
 834                         break;
 835
 836                 case Opt_fault_type:
 837                         if (args->from && match_int(args, &arg))
 838                                 return -EINVAL;
 839                         f2fs_build_fault_attr(sbi, 0, arg);
 840                         set_opt(sbi, FAULT_INJECTION);
 841                         break;
 842 #else
 843                 case Opt_fault_injection:
 844                         f2fs_info(sbi, "fault_injection options not supported");
 845                         break;
 846
 847                 case Opt_fault_type:
 848                         f2fs_info(sbi, "fault_type options not supported");
 849                         break;
 850 #endif
 851                 case Opt_lazytime:
 852                         sb->s_flags |= SB_LAZYTIME;
 853                         break;
 854                 case Opt_nolazytime:
 855                         sb->s_flags &= ~SB_LAZYTIME;
 856                         break;
 857 #ifdef CONFIG_QUOTA
 858                 case Opt_quota:
 859                 case Opt_usrquota:
 860                         set_opt(sbi, USRQUOTA);
 861                         break;
 862                 case Opt_grpquota:
 863                         set_opt(sbi, GRPQUOTA);
 864                         break;
 865                 case Opt_prjquota:
 866                         set_opt(sbi, PRJQUOTA);
 867                         break;
 868                 case Opt_usrjquota:
 869                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 870                         if (ret)
 871                                 return ret;
 872                         break;
 873                 case Opt_grpjquota:
 874                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 875                         if (ret)
 876                                 return ret;
 877                         break;
 878                 case Opt_prjjquota:
 879                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 880                         if (ret)
 881                                 return ret;
 882                         break;
 883                 case Opt_offusrjquota:
 884                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 885                         if (ret)
 886                                 return ret;
 887                         break;
 888                 case Opt_offgrpjquota:
 889                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 890                         if (ret)
 891                                 return ret;
 892                         break;
 893                 case Opt_offprjjquota:
 894                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 895                         if (ret)
 896                                 return ret;
 897                         break;
 898                 case Opt_jqfmt_vfsold:
 899                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 900                         break;
 901                 case Opt_jqfmt_vfsv0:
 902                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 903                         break;
 904                 case Opt_jqfmt_vfsv1:
 905                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 906                         break;
 907                 case Opt_noquota:
 908                         clear_opt(sbi, QUOTA);
 909                         clear_opt(sbi, USRQUOTA);
 910                         clear_opt(sbi, GRPQUOTA);
 911                         clear_opt(sbi, PRJQUOTA);
 912                         break;
 913 #else
 914                 case Opt_quota:
 915                 case Opt_usrquota:
 916                 case Opt_grpquota:
 917                 case Opt_prjquota:
 918                 case Opt_usrjquota:
 919                 case Opt_grpjquota:
 920                 case Opt_prjjquota:
 921                 case Opt_offusrjquota:
 922                 case Opt_offgrpjquota:
 923                 case Opt_offprjjquota:
 924                 case Opt_jqfmt_vfsold:
 925                 case Opt_jqfmt_vfsv0:
 926                 case Opt_jqfmt_vfsv1:
 927                 case Opt_noquota:
 928                         f2fs_info(sbi, "quota operations not supported");
 929                         break;
 930 #endif
 931                 case Opt_whint:
 932                         name = match_strdup(&args[0]);
 933                         if (!name)
 934                                 return -ENOMEM;
 935                         if (!strcmp(name, "user-based")) {
 936                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 937                         } else if (!strcmp(name, "off")) {
 938                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 939                         } else if (!strcmp(name, "fs-based")) {
 940                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 941                         } else {
 942                                 kfree(name);
 943                                 return -EINVAL;
 944                         }
 945                         kfree(name);
 946                         break;
 947                 case Opt_alloc:
 948                         name = match_strdup(&args[0]);
 949                         if (!name)
 950                                 return -ENOMEM;
 951
 952                         if (!strcmp(name, "default")) {
 953                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 954                         } else if (!strcmp(name, "reuse")) {
 955                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 956                         } else {
 957                                 kfree(name);
 958                                 return -EINVAL;
 959                         }
 960                         kfree(name);
 961                         break;
 962                 case Opt_fsync:
 963                         name = match_strdup(&args[0]);
 964                         if (!name)
 965                                 return -ENOMEM;
 966                         if (!strcmp(name, "posix")) {
 967                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 968                         } else if (!strcmp(name, "strict")) {
 969                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 970                         } else if (!strcmp(name, "nobarrier")) {
 971                                 F2FS_OPTION(sbi).fsync_mode =
 972                                                         FSYNC_MODE_NOBARRIER;
 973                         } else {
 974                                 kfree(name);
 975                                 return -EINVAL;
 976                         }
 977                         kfree(name);
 978                         break;
 979                 case Opt_test_dummy_encryption:
 980                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 981                                                              is_remount);
 982                         if (ret)
 983                                 return ret;
 984                         break;
 985                 case Opt_inlinecrypt:
 986 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
 987                         sb->s_flags |= SB_INLINECRYPT;
 988 #else
 989                         f2fs_info(sbi, "inline encryption not supported");
 990 #endif
 991                         break;
 992                 case Opt_checkpoint_disable_cap_perc:
 993                         if (args->from && match_int(args, &arg))
 994                                 return -EINVAL;
 995                         if (arg < 0 || arg > 100)
 996                                 return -EINVAL;
 997                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
 998                         set_opt(sbi, DISABLE_CHECKPOINT);
 999                         break;
1000                 case Opt_checkpoint_disable_cap:
1001                         if (args->from && match_int(args, &arg))
1002                                 return -EINVAL;
1003                         F2FS_OPTION(sbi).unusable_cap = arg;
1004                         set_opt(sbi, DISABLE_CHECKPOINT);
1005                         break;
1006                 case Opt_checkpoint_disable:
1007                         set_opt(sbi, DISABLE_CHECKPOINT);
1008                         break;
1009                 case Opt_checkpoint_enable:
1010                         clear_opt(sbi, DISABLE_CHECKPOINT);
1011                         break;
1012                 case Opt_checkpoint_merge:
1013                         set_opt(sbi, MERGE_CHECKPOINT);
1014                         break;
1015                 case Opt_nocheckpoint_merge:
1016                         clear_opt(sbi, MERGE_CHECKPOINT);
1017                         break;
1018 #ifdef CONFIG_F2FS_FS_COMPRESSION
1019                 case Opt_compress_algorithm:
1020                         if (!f2fs_sb_has_compression(sbi)) {
1021                                 f2fs_info(sbi, "Image doesn't support compression");
1022                                 break;
1023                         }
1024                         name = match_strdup(&args[0]);
1025                         if (!name)
1026                                 return -ENOMEM;
1027                         if (!strcmp(name, "lzo")) {
1028 #ifdef CONFIG_F2FS_FS_LZO
1029                                 F2FS_OPTION(sbi).compress_level = 0;
1030                                 F2FS_OPTION(sbi).compress_algorithm =
1031                                                                 COMPRESS_LZO;
1032 #else
1033                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1034 #endif
1035                         } else if (!strncmp(name, "lz4", 3)) {
1036 #ifdef CONFIG_F2FS_FS_LZ4
1037                                 ret = f2fs_set_lz4hc_level(sbi, name);
1038                                 if (ret) {
1039                                         kfree(name);
1040                                         return -EINVAL;
1041                                 }
1042                                 F2FS_OPTION(sbi).compress_algorithm =
1043                                                                 COMPRESS_LZ4;
1044 #else
1045                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1046 #endif
1047                         } else if (!strncmp(name, "zstd", 4)) {
1048 #ifdef CONFIG_F2FS_FS_ZSTD
1049                                 ret = f2fs_set_zstd_level(sbi, name);
1050                                 if (ret) {
1051                                         kfree(name);
1052                                         return -EINVAL;
1053                                 }
1054                                 F2FS_OPTION(sbi).compress_algorithm =
1055                                                                 COMPRESS_ZSTD;
1056 #else
1057                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1058 #endif
1059                         } else if (!strcmp(name, "lzo-rle")) {
1060 #ifdef CONFIG_F2FS_FS_LZORLE
1061                                 F2FS_OPTION(sbi).compress_level = 0;
1062                                 F2FS_OPTION(sbi).compress_algorithm =
1063                                                                 COMPRESS_LZORLE;
1064 #else
1065                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1066 #endif
1067                         } else {
1068                                 kfree(name);
1069                                 return -EINVAL;
1070                         }
1071                         kfree(name);
1072                         break;
1073                 case Opt_compress_log_size:
1074                         if (!f2fs_sb_has_compression(sbi)) {
1075                                 f2fs_info(sbi, "Image doesn't support compression");
1076                                 break;
1077                         }
1078                         if (args->from && match_int(args, &arg))
1079                                 return -EINVAL;
1080                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1081                                 arg > MAX_COMPRESS_LOG_SIZE) {
1082                                 f2fs_err(sbi,
1083                                         "Compress cluster log size is out of range");
1084                                 return -EINVAL;
1085                         }
1086                         F2FS_OPTION(sbi).compress_log_size = arg;
1087                         break;
1088                 case Opt_compress_extension:
1089                         if (!f2fs_sb_has_compression(sbi)) {
1090                                 f2fs_info(sbi, "Image doesn't support compression");
1091                                 break;
1092                         }
1093                         name = match_strdup(&args[0]);
1094                         if (!name)
1095                                 return -ENOMEM;
1096
1097                         ext = F2FS_OPTION(sbi).extensions;
1098                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1099
1100                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1101                                 ext_cnt >= COMPRESS_EXT_NUM) {
1102                                 f2fs_err(sbi,
1103                                         "invalid extension length/number");
1104                                 kfree(name);
1105                                 return -EINVAL;
1106                         }
1107
1108                         strcpy(ext[ext_cnt], name);
1109                         F2FS_OPTION(sbi).compress_ext_cnt++;
1110                         kfree(name);
1111                         break;
1112                 case Opt_nocompress_extension:
1113                         if (!f2fs_sb_has_compression(sbi)) {
1114                                 f2fs_info(sbi, "Image doesn't support compression");
1115                                 break;
1116                         }
1117                         name = match_strdup(&args[0]);
1118                         if (!name)
1119                                 return -ENOMEM;
1120
1121                         noext = F2FS_OPTION(sbi).noextensions;
1122                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1123
1124                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1125                                 noext_cnt >= COMPRESS_EXT_NUM) {
1126                                 f2fs_err(sbi,
1127                                         "invalid extension length/number");
1128                                 kfree(name);
1129                                 return -EINVAL;
1130                         }
1131
1132                         strcpy(noext[noext_cnt], name);
1133                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1134                         kfree(name);
1135                         break;
1136                 case Opt_compress_chksum:
1137                         F2FS_OPTION(sbi).compress_chksum = true;
1138                         break;
1139                 case Opt_compress_mode:
1140                         name = match_strdup(&args[0]);
1141                         if (!name)
1142                                 return -ENOMEM;
1143                         if (!strcmp(name, "fs")) {
1144                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1145                         } else if (!strcmp(name, "user")) {
1146                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1147                         } else {
1148                                 kfree(name);
1149                                 return -EINVAL;
1150                         }
1151                         kfree(name);
1152                         break;
1153                 case Opt_compress_cache:
1154                         set_opt(sbi, COMPRESS_CACHE);
1155                         break;
1156 #else
1157                 case Opt_compress_algorithm:
1158                 case Opt_compress_log_size:
1159                 case Opt_compress_extension:
1160                 case Opt_nocompress_extension:
1161                 case Opt_compress_chksum:
1162                 case Opt_compress_mode:
1163                 case Opt_compress_cache:
1164                         f2fs_info(sbi, "compression options not supported");
1165                         break;
1166 #endif
1167                 case Opt_atgc:
1168                         set_opt(sbi, ATGC);
1169                         break;
1170                 case Opt_gc_merge:
1171                         set_opt(sbi, GC_MERGE);
1172                         break;
1173                 case Opt_nogc_merge:
1174                         clear_opt(sbi, GC_MERGE);
1175                         break;
1176                 default:
1177                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1178                                  p);
1179                         return -EINVAL;
1180                 }
1181         }
1182 default_check:
1183 #ifdef CONFIG_QUOTA
1184         if (f2fs_check_quota_options(sbi))
1185                 return -EINVAL;
1186 #else
1187         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1188                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1189                 return -EINVAL;
1190         }
1191         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1192                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1193                 return -EINVAL;
1194         }
1195 #endif
1196 #ifndef CONFIG_UNICODE
1197         if (f2fs_sb_has_casefold(sbi)) {
1198                 f2fs_err(sbi,
1199                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1200                 return -EINVAL;
1201         }
1202 #endif
1203         /*
1204          * The BLKZONED feature indicates that the drive was formatted with
1205          * zone alignment optimization. This is optional for host-aware
1206          * devices, but mandatory for host-managed zoned block devices.
1207          */
1208 #ifndef CONFIG_BLK_DEV_ZONED
1209         if (f2fs_sb_has_blkzoned(sbi)) {
1210                 f2fs_err(sbi, "Zoned block device support is not enabled");
1211                 return -EINVAL;
1212         }
1213 #endif
1214
1215 #ifdef CONFIG_F2FS_FS_COMPRESSION
1216         if (f2fs_test_compress_extension(sbi)) {
1217                 f2fs_err(sbi, "invalid compress or nocompress extension");
1218                 return -EINVAL;
1219         }
1220 #endif
1221
1222         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1223                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1224                          F2FS_IO_SIZE_KB(sbi));
1225                 return -EINVAL;
1226         }
1227
1228         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1229                 int min_size, max_size;
1230
1231                 if (!f2fs_sb_has_extra_attr(sbi) ||
1232                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1233                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1234                         return -EINVAL;
1235                 }
1236                 if (!test_opt(sbi, INLINE_XATTR)) {
1237                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1238                         return -EINVAL;
1239                 }
1240
1241                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1242                 max_size = MAX_INLINE_XATTR_SIZE;
1243
1244                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1245                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1246                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1247                                  min_size, max_size);
1248                         return -EINVAL;
1249                 }
1250         }
1251
1252         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1253                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1254                 return -EINVAL;
1255         }
1256
1257         /* Not pass down write hints if the number of active logs is lesser
1258          * than NR_CURSEG_PERSIST_TYPE.
1259          */
1260         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
1261                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1262
1263         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1264                 f2fs_err(sbi, "Allow to mount readonly mode only");
1265                 return -EROFS;
1266         }
1267         return 0;
1268 }
1269
1270 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1271 {
1272         struct f2fs_inode_info *fi;
1273
1274         fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
1275         if (!fi)
1276                 return NULL;
1277
1278         init_once((void *) fi);
1279
1280         /* Initialize f2fs-specific inode info */
1281         atomic_set(&fi->dirty_pages, 0);
1282         atomic_set(&fi->i_compr_blocks, 0);
1283         init_rwsem(&fi->i_sem);
1284         spin_lock_init(&fi->i_size_lock);
1285         INIT_LIST_HEAD(&fi->dirty_list);
1286         INIT_LIST_HEAD(&fi->gdirty_list);
1287         INIT_LIST_HEAD(&fi->inmem_ilist);
1288         INIT_LIST_HEAD(&fi->inmem_pages);
1289         mutex_init(&fi->inmem_lock);
1290         init_rwsem(&fi->i_gc_rwsem[READ]);
1291         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1292         init_rwsem(&fi->i_mmap_sem);
1293         init_rwsem(&fi->i_xattr_sem);
1294
1295         /* Will be used by directory only */
1296         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1297
1298         return &fi->vfs_inode;
1299 }
1300
1301 static int f2fs_drop_inode(struct inode *inode)
1302 {
1303         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1304         int ret;
1305
1306         /*
1307          * during filesystem shutdown, if checkpoint is disabled,
1308          * drop useless meta/node dirty pages.
1309          */
1310         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1311                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1312                         inode->i_ino == F2FS_META_INO(sbi)) {
1313                         trace_f2fs_drop_inode(inode, 1);
1314                         return 1;
1315                 }
1316         }
1317
1318         /*
1319          * This is to avoid a deadlock condition like below.
1320          * writeback_single_inode(inode)
1321          *  - f2fs_write_data_page
1322          *    - f2fs_gc -> iput -> evict
1323          *       - inode_wait_for_writeback(inode)
1324          */
1325         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1326                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1327                         /* to avoid evict_inode call simultaneously */
1328                         atomic_inc(&inode->i_count);
1329                         spin_unlock(&inode->i_lock);
1330
1331                         /* some remained atomic pages should discarded */
1332                         if (f2fs_is_atomic_file(inode))
1333                                 f2fs_drop_inmem_pages(inode);
1334
1335                         /* should remain fi->extent_tree for writepage */
1336                         f2fs_destroy_extent_node(inode);
1337
1338                         sb_start_intwrite(inode->i_sb);
1339                         f2fs_i_size_write(inode, 0);
1340
1341                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1342                                         inode, NULL, 0, DATA);
1343                         truncate_inode_pages_final(inode->i_mapping);
1344
1345                         if (F2FS_HAS_BLOCKS(inode))
1346                                 f2fs_truncate(inode);
1347
1348                         sb_end_intwrite(inode->i_sb);
1349
1350                         spin_lock(&inode->i_lock);
1351                         atomic_dec(&inode->i_count);
1352                 }
1353                 trace_f2fs_drop_inode(inode, 0);
1354                 return 0;
1355         }
1356         ret = generic_drop_inode(inode);
1357         if (!ret)
1358                 ret = fscrypt_drop_inode(inode);
1359         trace_f2fs_drop_inode(inode, ret);
1360         return ret;
1361 }
1362
1363 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1364 {
1365         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1366         int ret = 0;
1367
1368         spin_lock(&sbi->inode_lock[DIRTY_META]);
1369         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1370                 ret = 1;
1371         } else {
1372                 set_inode_flag(inode, FI_DIRTY_INODE);
1373                 stat_inc_dirty_inode(sbi, DIRTY_META);
1374         }
1375         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1376                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1377                                 &sbi->inode_list[DIRTY_META]);
1378                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1379         }
1380         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1381         return ret;
1382 }
1383
1384 void f2fs_inode_synced(struct inode *inode)
1385 {
1386         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1387
1388         spin_lock(&sbi->inode_lock[DIRTY_META]);
1389         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1390                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1391                 return;
1392         }
1393         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1394                 list_del_init(&F2FS_I(inode)->gdirty_list);
1395                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1396         }
1397         clear_inode_flag(inode, FI_DIRTY_INODE);
1398         clear_inode_flag(inode, FI_AUTO_RECOVER);
1399         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1400         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1401 }
1402
1403 /*
1404  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1405  *
1406  * We should call set_dirty_inode to write the dirty inode through write_inode.
1407  */
1408 static void f2fs_dirty_inode(struct inode *inode, int flags)
1409 {
1410         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1411
1412         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1413                         inode->i_ino == F2FS_META_INO(sbi))
1414                 return;
1415
1416         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1417                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1418
1419         f2fs_inode_dirtied(inode, false);
1420 }
1421
1422 static void f2fs_free_inode(struct inode *inode)
1423 {
1424         fscrypt_free_inode(inode);
1425         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1426 }
1427
1428 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1429 {
1430         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1431         percpu_counter_destroy(&sbi->total_valid_inode_count);
1432 }
1433
1434 static void destroy_device_list(struct f2fs_sb_info *sbi)
1435 {
1436         int i;
1437
1438         for (i = 0; i < sbi->s_ndevs; i++) {
1439                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1440 #ifdef CONFIG_BLK_DEV_ZONED
1441                 kvfree(FDEV(i).blkz_seq);
1442                 kfree(FDEV(i).zone_capacity_blocks);
1443 #endif
1444         }
1445         kvfree(sbi->devs);
1446 }
1447
1448 static void f2fs_put_super(struct super_block *sb)
1449 {
1450         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1451         int i;
1452         bool dropped;
1453
1454         /* unregister procfs/sysfs entries in advance to avoid race case */
1455         f2fs_unregister_sysfs(sbi);
1456
1457         f2fs_quota_off_umount(sb);
1458
1459         /* prevent remaining shrinker jobs */
1460         mutex_lock(&sbi->umount_mutex);
1461
1462         /*
1463          * flush all issued checkpoints and stop checkpoint issue thread.
1464          * after then, all checkpoints should be done by each process context.
1465          */
1466         f2fs_stop_ckpt_thread(sbi);
1467
1468         /*
1469          * We don't need to do checkpoint when superblock is clean.
1470          * But, the previous checkpoint was not done by umount, it needs to do
1471          * clean checkpoint again.
1472          */
1473         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1474                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1475                 struct cp_control cpc = {
1476                         .reason = CP_UMOUNT,
1477                 };
1478                 f2fs_write_checkpoint(sbi, &cpc);
1479         }
1480
1481         /* be sure to wait for any on-going discard commands */
1482         dropped = f2fs_issue_discard_timeout(sbi);
1483
1484         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1485                                         !sbi->discard_blks && !dropped) {
1486                 struct cp_control cpc = {
1487                         .reason = CP_UMOUNT | CP_TRIMMED,
1488                 };
1489                 f2fs_write_checkpoint(sbi, &cpc);
1490         }
1491
1492         /*
1493          * normally superblock is clean, so we need to release this.
1494          * In addition, EIO will skip do checkpoint, we need this as well.
1495          */
1496         f2fs_release_ino_entry(sbi, true);
1497
1498         f2fs_leave_shrinker(sbi);
1499         mutex_unlock(&sbi->umount_mutex);
1500
1501         /* our cp_error case, we can wait for any writeback page */
1502         f2fs_flush_merged_writes(sbi);
1503
1504         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1505
1506         f2fs_bug_on(sbi, sbi->fsync_node_num);
1507
1508         f2fs_destroy_compress_inode(sbi);
1509
1510         iput(sbi->node_inode);
1511         sbi->node_inode = NULL;
1512
1513         iput(sbi->meta_inode);
1514         sbi->meta_inode = NULL;
1515
1516         /*
1517          * iput() can update stat information, if f2fs_write_checkpoint()
1518          * above failed with error.
1519          */
1520         f2fs_destroy_stats(sbi);
1521
1522         /* destroy f2fs internal modules */
1523         f2fs_destroy_node_manager(sbi);
1524         f2fs_destroy_segment_manager(sbi);
1525
1526         f2fs_destroy_post_read_wq(sbi);
1527
1528         kvfree(sbi->ckpt);
1529
1530         sb->s_fs_info = NULL;
1531         if (sbi->s_chksum_driver)
1532                 crypto_free_shash(sbi->s_chksum_driver);
1533         kfree(sbi->raw_super);
1534
1535         destroy_device_list(sbi);
1536         f2fs_destroy_page_array_cache(sbi);
1537         f2fs_destroy_xattr_caches(sbi);
1538         mempool_destroy(sbi->write_io_dummy);
1539 #ifdef CONFIG_QUOTA
1540         for (i = 0; i < MAXQUOTAS; i++)
1541                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1542 #endif
1543         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1544         destroy_percpu_info(sbi);
1545         for (i = 0; i < NR_PAGE_TYPE; i++)
1546                 kvfree(sbi->write_io[i]);
1547 #ifdef CONFIG_UNICODE
1548         utf8_unload(sb->s_encoding);
1549 #endif
1550         kfree(sbi);
1551 }
1552
1553 int f2fs_sync_fs(struct super_block *sb, int sync)
1554 {
1555         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1556         int err = 0;
1557
1558         if (unlikely(f2fs_cp_error(sbi)))
1559                 return 0;
1560         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1561                 return 0;
1562
1563         trace_f2fs_sync_fs(sb, sync);
1564
1565         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1566                 return -EAGAIN;
1567
1568         if (sync)
1569                 err = f2fs_issue_checkpoint(sbi);
1570
1571         return err;
1572 }
1573
1574 static int f2fs_freeze(struct super_block *sb)
1575 {
1576         if (f2fs_readonly(sb))
1577                 return 0;
1578
1579         /* IO error happened before */
1580         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1581                 return -EIO;
1582
1583         /* must be clean, since sync_filesystem() was already called */
1584         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1585                 return -EINVAL;
1586
1587         /* ensure no checkpoint required */
1588         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1589                 return -EINVAL;
1590         return 0;
1591 }
1592
1593 static int f2fs_unfreeze(struct super_block *sb)
1594 {
1595         return 0;
1596 }
1597
1598 #ifdef CONFIG_QUOTA
1599 static int f2fs_statfs_project(struct super_block *sb,
1600                                 kprojid_t projid, struct kstatfs *buf)
1601 {
1602         struct kqid qid;
1603         struct dquot *dquot;
1604         u64 limit;
1605         u64 curblock;
1606
1607         qid = make_kqid_projid(projid);
1608         dquot = dqget(sb, qid);
1609         if (IS_ERR(dquot))
1610                 return PTR_ERR(dquot);
1611         spin_lock(&dquot->dq_dqb_lock);
1612
1613         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1614                                         dquot->dq_dqb.dqb_bhardlimit);
1615         if (limit)
1616                 limit >>= sb->s_blocksize_bits;
1617
1618         if (limit && buf->f_blocks > limit) {
1619                 curblock = (dquot->dq_dqb.dqb_curspace +
1620                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1621                 buf->f_blocks = limit;
1622                 buf->f_bfree = buf->f_bavail =
1623                         (buf->f_blocks > curblock) ?
1624                          (buf->f_blocks - curblock) : 0;
1625         }
1626
1627         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1628                                         dquot->dq_dqb.dqb_ihardlimit);
1629
1630         if (limit && buf->f_files > limit) {
1631                 buf->f_files = limit;
1632                 buf->f_ffree =
1633                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1634                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1635         }
1636
1637         spin_unlock(&dquot->dq_dqb_lock);
1638         dqput(dquot);
1639         return 0;
1640 }
1641 #endif
1642
1643 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1644 {
1645         struct super_block *sb = dentry->d_sb;
1646         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1647         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1648         block_t total_count, user_block_count, start_count;
1649         u64 avail_node_count;
1650
1651         total_count = le64_to_cpu(sbi->raw_super->block_count);
1652         user_block_count = sbi->user_block_count;
1653         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1654         buf->f_type = F2FS_SUPER_MAGIC;
1655         buf->f_bsize = sbi->blocksize;
1656
1657         buf->f_blocks = total_count - start_count;
1658         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1659                                                 sbi->current_reserved_blocks;
1660
1661         spin_lock(&sbi->stat_lock);
1662         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1663                 buf->f_bfree = 0;
1664         else
1665                 buf->f_bfree -= sbi->unusable_block_count;
1666         spin_unlock(&sbi->stat_lock);
1667
1668         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1669                 buf->f_bavail = buf->f_bfree -
1670                                 F2FS_OPTION(sbi).root_reserved_blocks;
1671         else
1672                 buf->f_bavail = 0;
1673
1674         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1675
1676         if (avail_node_count > user_block_count) {
1677                 buf->f_files = user_block_count;
1678                 buf->f_ffree = buf->f_bavail;
1679         } else {
1680                 buf->f_files = avail_node_count;
1681                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1682                                         buf->f_bavail);
1683         }
1684
1685         buf->f_namelen = F2FS_NAME_LEN;
1686         buf->f_fsid    = u64_to_fsid(id);
1687
1688 #ifdef CONFIG_QUOTA
1689         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1690                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1691                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1692         }
1693 #endif
1694         return 0;
1695 }
1696
1697 static inline void f2fs_show_quota_options(struct seq_file *seq,
1698                                            struct super_block *sb)
1699 {
1700 #ifdef CONFIG_QUOTA
1701         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1702
1703         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1704                 char *fmtname = "";
1705
1706                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1707                 case QFMT_VFS_OLD:
1708                         fmtname = "vfsold";
1709                         break;
1710                 case QFMT_VFS_V0:
1711                         fmtname = "vfsv0";
1712                         break;
1713                 case QFMT_VFS_V1:
1714                         fmtname = "vfsv1";
1715                         break;
1716                 }
1717                 seq_printf(seq, ",jqfmt=%s", fmtname);
1718         }
1719
1720         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1721                 seq_show_option(seq, "usrjquota",
1722                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1723
1724         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1725                 seq_show_option(seq, "grpjquota",
1726                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1727
1728         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1729                 seq_show_option(seq, "prjjquota",
1730                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1731 #endif
1732 }
1733
1734 #ifdef CONFIG_F2FS_FS_COMPRESSION
1735 static inline void f2fs_show_compress_options(struct seq_file *seq,
1736                                                         struct super_block *sb)
1737 {
1738         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1739         char *algtype = "";
1740         int i;
1741
1742         if (!f2fs_sb_has_compression(sbi))
1743                 return;
1744
1745         switch (F2FS_OPTION(sbi).compress_algorithm) {
1746         case COMPRESS_LZO:
1747                 algtype = "lzo";
1748                 break;
1749         case COMPRESS_LZ4:
1750                 algtype = "lz4";
1751                 break;
1752         case COMPRESS_ZSTD:
1753                 algtype = "zstd";
1754                 break;
1755         case COMPRESS_LZORLE:
1756                 algtype = "lzo-rle";
1757                 break;
1758         }
1759         seq_printf(seq, ",compress_algorithm=%s", algtype);
1760
1761         if (F2FS_OPTION(sbi).compress_level)
1762                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1763
1764         seq_printf(seq, ",compress_log_size=%u",
1765                         F2FS_OPTION(sbi).compress_log_size);
1766
1767         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1768                 seq_printf(seq, ",compress_extension=%s",
1769                         F2FS_OPTION(sbi).extensions[i]);
1770         }
1771
1772         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1773                 seq_printf(seq, ",nocompress_extension=%s",
1774                         F2FS_OPTION(sbi).noextensions[i]);
1775         }
1776
1777         if (F2FS_OPTION(sbi).compress_chksum)
1778                 seq_puts(seq, ",compress_chksum");
1779
1780         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1781                 seq_printf(seq, ",compress_mode=%s", "fs");
1782         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1783                 seq_printf(seq, ",compress_mode=%s", "user");
1784
1785         if (test_opt(sbi, COMPRESS_CACHE))
1786                 seq_puts(seq, ",compress_cache");
1787 }
1788 #endif
1789
1790 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1791 {
1792         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1793
1794         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1795                 seq_printf(seq, ",background_gc=%s", "sync");
1796         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1797                 seq_printf(seq, ",background_gc=%s", "on");
1798         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1799                 seq_printf(seq, ",background_gc=%s", "off");
1800
1801         if (test_opt(sbi, GC_MERGE))
1802                 seq_puts(seq, ",gc_merge");
1803
1804         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1805                 seq_puts(seq, ",disable_roll_forward");
1806         if (test_opt(sbi, NORECOVERY))
1807                 seq_puts(seq, ",norecovery");
1808         if (test_opt(sbi, DISCARD))
1809                 seq_puts(seq, ",discard");
1810         else
1811                 seq_puts(seq, ",nodiscard");
1812         if (test_opt(sbi, NOHEAP))
1813                 seq_puts(seq, ",no_heap");
1814         else
1815                 seq_puts(seq, ",heap");
1816 #ifdef CONFIG_F2FS_FS_XATTR
1817         if (test_opt(sbi, XATTR_USER))
1818                 seq_puts(seq, ",user_xattr");
1819         else
1820                 seq_puts(seq, ",nouser_xattr");
1821         if (test_opt(sbi, INLINE_XATTR))
1822                 seq_puts(seq, ",inline_xattr");
1823         else
1824                 seq_puts(seq, ",noinline_xattr");
1825         if (test_opt(sbi, INLINE_XATTR_SIZE))
1826                 seq_printf(seq, ",inline_xattr_size=%u",
1827                                         F2FS_OPTION(sbi).inline_xattr_size);
1828 #endif
1829 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1830         if (test_opt(sbi, POSIX_ACL))
1831                 seq_puts(seq, ",acl");
1832         else
1833                 seq_puts(seq, ",noacl");
1834 #endif
1835         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1836                 seq_puts(seq, ",disable_ext_identify");
1837         if (test_opt(sbi, INLINE_DATA))
1838                 seq_puts(seq, ",inline_data");
1839         else
1840                 seq_puts(seq, ",noinline_data");
1841         if (test_opt(sbi, INLINE_DENTRY))
1842                 seq_puts(seq, ",inline_dentry");
1843         else
1844                 seq_puts(seq, ",noinline_dentry");
1845         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1846                 seq_puts(seq, ",flush_merge");
1847         if (test_opt(sbi, NOBARRIER))
1848                 seq_puts(seq, ",nobarrier");
1849         if (test_opt(sbi, FASTBOOT))
1850                 seq_puts(seq, ",fastboot");
1851         if (test_opt(sbi, EXTENT_CACHE))
1852                 seq_puts(seq, ",extent_cache");
1853         else
1854                 seq_puts(seq, ",noextent_cache");
1855         if (test_opt(sbi, DATA_FLUSH))
1856                 seq_puts(seq, ",data_flush");
1857
1858         seq_puts(seq, ",mode=");
1859         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1860                 seq_puts(seq, "adaptive");
1861         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1862                 seq_puts(seq, "lfs");
1863         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1864         if (test_opt(sbi, RESERVE_ROOT))
1865                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1866                                 F2FS_OPTION(sbi).root_reserved_blocks,
1867                                 from_kuid_munged(&init_user_ns,
1868                                         F2FS_OPTION(sbi).s_resuid),
1869                                 from_kgid_munged(&init_user_ns,
1870                                         F2FS_OPTION(sbi).s_resgid));
1871         if (F2FS_IO_SIZE_BITS(sbi))
1872                 seq_printf(seq, ",io_bits=%u",
1873                                 F2FS_OPTION(sbi).write_io_size_bits);
1874 #ifdef CONFIG_F2FS_FAULT_INJECTION
1875         if (test_opt(sbi, FAULT_INJECTION)) {
1876                 seq_printf(seq, ",fault_injection=%u",
1877                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1878                 seq_printf(seq, ",fault_type=%u",
1879                                 F2FS_OPTION(sbi).fault_info.inject_type);
1880         }
1881 #endif
1882 #ifdef CONFIG_QUOTA
1883         if (test_opt(sbi, QUOTA))
1884                 seq_puts(seq, ",quota");
1885         if (test_opt(sbi, USRQUOTA))
1886                 seq_puts(seq, ",usrquota");
1887         if (test_opt(sbi, GRPQUOTA))
1888                 seq_puts(seq, ",grpquota");
1889         if (test_opt(sbi, PRJQUOTA))
1890                 seq_puts(seq, ",prjquota");
1891 #endif
1892         f2fs_show_quota_options(seq, sbi->sb);
1893         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1894                 seq_printf(seq, ",whint_mode=%s", "user-based");
1895         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1896                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1897
1898         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1899
1900         if (sbi->sb->s_flags & SB_INLINECRYPT)
1901                 seq_puts(seq, ",inlinecrypt");
1902
1903         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1904                 seq_printf(seq, ",alloc_mode=%s", "default");
1905         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1906                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1907
1908         if (test_opt(sbi, DISABLE_CHECKPOINT))
1909                 seq_printf(seq, ",checkpoint=disable:%u",
1910                                 F2FS_OPTION(sbi).unusable_cap);
1911         if (test_opt(sbi, MERGE_CHECKPOINT))
1912                 seq_puts(seq, ",checkpoint_merge");
1913         else
1914                 seq_puts(seq, ",nocheckpoint_merge");
1915         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1916                 seq_printf(seq, ",fsync_mode=%s", "posix");
1917         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1918                 seq_printf(seq, ",fsync_mode=%s", "strict");
1919         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1920                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1921
1922 #ifdef CONFIG_F2FS_FS_COMPRESSION
1923         f2fs_show_compress_options(seq, sbi->sb);
1924 #endif
1925
1926         if (test_opt(sbi, ATGC))
1927                 seq_puts(seq, ",atgc");
1928         return 0;
1929 }
1930
1931 static void default_options(struct f2fs_sb_info *sbi)
1932 {
1933         /* init some FS parameters */
1934         if (f2fs_sb_has_readonly(sbi))
1935                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
1936         else
1937                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
1938
1939         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1940         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1941         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1942         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1943         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1944         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1945         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1946         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1947         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1948         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1949         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1950
1951         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1952
1953         set_opt(sbi, INLINE_XATTR);
1954         set_opt(sbi, INLINE_DATA);
1955         set_opt(sbi, INLINE_DENTRY);
1956         set_opt(sbi, EXTENT_CACHE);
1957         set_opt(sbi, NOHEAP);
1958         clear_opt(sbi, DISABLE_CHECKPOINT);
1959         set_opt(sbi, MERGE_CHECKPOINT);
1960         F2FS_OPTION(sbi).unusable_cap = 0;
1961         sbi->sb->s_flags |= SB_LAZYTIME;
1962         set_opt(sbi, FLUSH_MERGE);
1963         set_opt(sbi, DISCARD);
1964         if (f2fs_sb_has_blkzoned(sbi))
1965                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
1966         else
1967                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
1968
1969 #ifdef CONFIG_F2FS_FS_XATTR
1970         set_opt(sbi, XATTR_USER);
1971 #endif
1972 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1973         set_opt(sbi, POSIX_ACL);
1974 #endif
1975
1976         f2fs_build_fault_attr(sbi, 0, 0);
1977 }
1978
1979 #ifdef CONFIG_QUOTA
1980 static int f2fs_enable_quotas(struct super_block *sb);
1981 #endif
1982
1983 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1984 {
1985         unsigned int s_flags = sbi->sb->s_flags;
1986         struct cp_control cpc;
1987         int err = 0;
1988         int ret;
1989         block_t unusable;
1990
1991         if (s_flags & SB_RDONLY) {
1992                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1993                 return -EINVAL;
1994         }
1995         sbi->sb->s_flags |= SB_ACTIVE;
1996
1997         f2fs_update_time(sbi, DISABLE_TIME);
1998
1999         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2000                 down_write(&sbi->gc_lock);
2001                 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
2002                 if (err == -ENODATA) {
2003                         err = 0;
2004                         break;
2005                 }
2006                 if (err && err != -EAGAIN)
2007                         break;
2008         }
2009
2010         ret = sync_filesystem(sbi->sb);
2011         if (ret || err) {
2012                 err = ret ? ret : err;
2013                 goto restore_flag;
2014         }
2015
2016         unusable = f2fs_get_unusable_blocks(sbi);
2017         if (f2fs_disable_cp_again(sbi, unusable)) {
2018                 err = -EAGAIN;
2019                 goto restore_flag;
2020         }
2021
2022         down_write(&sbi->gc_lock);
2023         cpc.reason = CP_PAUSE;
2024         set_sbi_flag(sbi, SBI_CP_DISABLED);
2025         err = f2fs_write_checkpoint(sbi, &cpc);
2026         if (err)
2027                 goto out_unlock;
2028
2029         spin_lock(&sbi->stat_lock);
2030         sbi->unusable_block_count = unusable;
2031         spin_unlock(&sbi->stat_lock);
2032
2033 out_unlock:
2034         up_write(&sbi->gc_lock);
2035 restore_flag:
2036         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2037         return err;
2038 }
2039
2040 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2041 {
2042         /* we should flush all the data to keep data consistency */
2043         sync_inodes_sb(sbi->sb);
2044
2045         down_write(&sbi->gc_lock);
2046         f2fs_dirty_to_prefree(sbi);
2047
2048         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2049         set_sbi_flag(sbi, SBI_IS_DIRTY);
2050         up_write(&sbi->gc_lock);
2051
2052         f2fs_sync_fs(sbi->sb, 1);
2053 }
2054
2055 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2056 {
2057         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2058         struct f2fs_mount_info org_mount_opt;
2059         unsigned long old_sb_flags;
2060         int err;
2061         bool need_restart_gc = false, need_stop_gc = false;
2062         bool need_restart_ckpt = false, need_stop_ckpt = false;
2063         bool need_restart_flush = false, need_stop_flush = false;
2064         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2065         bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
2066         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2067         bool no_atgc = !test_opt(sbi, ATGC);
2068         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2069         bool checkpoint_changed;
2070 #ifdef CONFIG_QUOTA
2071         int i, j;
2072 #endif
2073
2074         /*
2075          * Save the old mount options in case we
2076          * need to restore them.
2077          */
2078         org_mount_opt = sbi->mount_opt;
2079         old_sb_flags = sb->s_flags;
2080
2081 #ifdef CONFIG_QUOTA
2082         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2083         for (i = 0; i < MAXQUOTAS; i++) {
2084                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2085                         org_mount_opt.s_qf_names[i] =
2086                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2087                                 GFP_KERNEL);
2088                         if (!org_mount_opt.s_qf_names[i]) {
2089                                 for (j = 0; j < i; j++)
2090                                         kfree(org_mount_opt.s_qf_names[j]);
2091                                 return -ENOMEM;
2092                         }
2093                 } else {
2094                         org_mount_opt.s_qf_names[i] = NULL;
2095                 }
2096         }
2097 #endif
2098
2099         /* recover superblocks we couldn't write due to previous RO mount */
2100         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2101                 err = f2fs_commit_super(sbi, false);
2102                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2103                           err);
2104                 if (!err)
2105                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2106         }
2107
2108         default_options(sbi);
2109
2110         /* parse mount options */
2111         err = parse_options(sb, data, true);
2112         if (err)
2113                 goto restore_opts;
2114         checkpoint_changed =
2115                         disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
2116
2117         /*
2118          * Previous and new state of filesystem is RO,
2119          * so skip checking GC and FLUSH_MERGE conditions.
2120          */
2121         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2122                 goto skip;
2123
2124         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2125                 err = -EROFS;
2126                 goto restore_opts;
2127         }
2128
2129 #ifdef CONFIG_QUOTA
2130         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2131                 err = dquot_suspend(sb, -1);
2132                 if (err < 0)
2133                         goto restore_opts;
2134         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2135                 /* dquot_resume needs RW */
2136                 sb->s_flags &= ~SB_RDONLY;
2137                 if (sb_any_quota_suspended(sb)) {
2138                         dquot_resume(sb, -1);
2139                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2140                         err = f2fs_enable_quotas(sb);
2141                         if (err)
2142                                 goto restore_opts;
2143                 }
2144         }
2145 #endif
2146         /* disallow enable atgc dynamically */
2147         if (no_atgc == !!test_opt(sbi, ATGC)) {
2148                 err = -EINVAL;
2149                 f2fs_warn(sbi, "switch atgc option is not allowed");
2150                 goto restore_opts;
2151         }
2152
2153         /* disallow enable/disable extent_cache dynamically */
2154         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2155                 err = -EINVAL;
2156                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2157                 goto restore_opts;
2158         }
2159
2160         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2161                 err = -EINVAL;
2162                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2163                 goto restore_opts;
2164         }
2165
2166         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2167                 err = -EINVAL;
2168                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2169                 goto restore_opts;
2170         }
2171
2172         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2173                 err = -EINVAL;
2174                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2175                 goto restore_opts;
2176         }
2177
2178         /*
2179          * We stop the GC thread if FS is mounted as RO
2180          * or if background_gc = off is passed in mount
2181          * option. Also sync the filesystem.
2182          */
2183         if ((*flags & SB_RDONLY) ||
2184                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2185                         !test_opt(sbi, GC_MERGE))) {
2186                 if (sbi->gc_thread) {
2187                         f2fs_stop_gc_thread(sbi);
2188                         need_restart_gc = true;
2189                 }
2190         } else if (!sbi->gc_thread) {
2191                 err = f2fs_start_gc_thread(sbi);
2192                 if (err)
2193                         goto restore_opts;
2194                 need_stop_gc = true;
2195         }
2196
2197         if (*flags & SB_RDONLY ||
2198                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
2199                 sync_inodes_sb(sb);
2200
2201                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2202                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2203                 f2fs_sync_fs(sb, 1);
2204                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2205         }
2206
2207         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2208                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2209                 f2fs_stop_ckpt_thread(sbi);
2210                 need_restart_ckpt = true;
2211         } else {
2212                 err = f2fs_start_ckpt_thread(sbi);
2213                 if (err) {
2214                         f2fs_err(sbi,
2215                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2216                             err);
2217                         goto restore_gc;
2218                 }
2219                 need_stop_ckpt = true;
2220         }
2221
2222         /*
2223          * We stop issue flush thread if FS is mounted as RO
2224          * or if flush_merge is not passed in mount option.
2225          */
2226         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2227                 clear_opt(sbi, FLUSH_MERGE);
2228                 f2fs_destroy_flush_cmd_control(sbi, false);
2229                 need_restart_flush = true;
2230         } else {
2231                 err = f2fs_create_flush_cmd_control(sbi);
2232                 if (err)
2233                         goto restore_ckpt;
2234                 need_stop_flush = true;
2235         }
2236
2237         if (checkpoint_changed) {
2238                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2239                         err = f2fs_disable_checkpoint(sbi);
2240                         if (err)
2241                                 goto restore_flush;
2242                 } else {
2243                         f2fs_enable_checkpoint(sbi);
2244                 }
2245         }
2246
2247 skip:
2248 #ifdef CONFIG_QUOTA
2249         /* Release old quota file names */
2250         for (i = 0; i < MAXQUOTAS; i++)
2251                 kfree(org_mount_opt.s_qf_names[i]);
2252 #endif
2253         /* Update the POSIXACL Flag */
2254         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2255                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2256
2257         limit_reserve_root(sbi);
2258         adjust_unusable_cap_perc(sbi);
2259         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2260         return 0;
2261 restore_flush:
2262         if (need_restart_flush) {
2263                 if (f2fs_create_flush_cmd_control(sbi))
2264                         f2fs_warn(sbi, "background flush thread has stopped");
2265         } else if (need_stop_flush) {
2266                 clear_opt(sbi, FLUSH_MERGE);
2267                 f2fs_destroy_flush_cmd_control(sbi, false);
2268         }
2269 restore_ckpt:
2270         if (need_restart_ckpt) {
2271                 if (f2fs_start_ckpt_thread(sbi))
2272                         f2fs_warn(sbi, "background ckpt thread has stopped");
2273         } else if (need_stop_ckpt) {
2274                 f2fs_stop_ckpt_thread(sbi);
2275         }
2276 restore_gc:
2277         if (need_restart_gc) {
2278                 if (f2fs_start_gc_thread(sbi))
2279                         f2fs_warn(sbi, "background gc thread has stopped");
2280         } else if (need_stop_gc) {
2281                 f2fs_stop_gc_thread(sbi);
2282         }
2283 restore_opts:
2284 #ifdef CONFIG_QUOTA
2285         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2286         for (i = 0; i < MAXQUOTAS; i++) {
2287                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2288                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2289         }
2290 #endif
2291         sbi->mount_opt = org_mount_opt;
2292         sb->s_flags = old_sb_flags;
2293         return err;
2294 }
2295
2296 #ifdef CONFIG_QUOTA
2297 /* Read data from quotafile */
2298 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2299                                size_t len, loff_t off)
2300 {
2301         struct inode *inode = sb_dqopt(sb)->files[type];
2302         struct address_space *mapping = inode->i_mapping;
2303         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2304         int offset = off & (sb->s_blocksize - 1);
2305         int tocopy;
2306         size_t toread;
2307         loff_t i_size = i_size_read(inode);
2308         struct page *page;
2309         char *kaddr;
2310
2311         if (off > i_size)
2312                 return 0;
2313
2314         if (off + len > i_size)
2315                 len = i_size - off;
2316         toread = len;
2317         while (toread > 0) {
2318                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2319 repeat:
2320                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2321                 if (IS_ERR(page)) {
2322                         if (PTR_ERR(page) == -ENOMEM) {
2323                                 congestion_wait(BLK_RW_ASYNC,
2324                                                 DEFAULT_IO_TIMEOUT);
2325                                 goto repeat;
2326                         }
2327                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2328                         return PTR_ERR(page);
2329                 }
2330
2331                 lock_page(page);
2332
2333                 if (unlikely(page->mapping != mapping)) {
2334                         f2fs_put_page(page, 1);
2335                         goto repeat;
2336                 }
2337                 if (unlikely(!PageUptodate(page))) {
2338                         f2fs_put_page(page, 1);
2339                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2340                         return -EIO;
2341                 }
2342
2343                 kaddr = kmap_atomic(page);
2344                 memcpy(data, kaddr + offset, tocopy);
2345                 kunmap_atomic(kaddr);
2346                 f2fs_put_page(page, 1);
2347
2348                 offset = 0;
2349                 toread -= tocopy;
2350                 data += tocopy;
2351                 blkidx++;
2352         }
2353         return len;
2354 }
2355
2356 /* Write to quotafile */
2357 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2358                                 const char *data, size_t len, loff_t off)
2359 {
2360         struct inode *inode = sb_dqopt(sb)->files[type];
2361         struct address_space *mapping = inode->i_mapping;
2362         const struct address_space_operations *a_ops = mapping->a_ops;
2363         int offset = off & (sb->s_blocksize - 1);
2364         size_t towrite = len;
2365         struct page *page;
2366         void *fsdata = NULL;
2367         char *kaddr;
2368         int err = 0;
2369         int tocopy;
2370
2371         while (towrite > 0) {
2372                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2373                                                                 towrite);
2374 retry:
2375                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2376                                                         &page, &fsdata);
2377                 if (unlikely(err)) {
2378                         if (err == -ENOMEM) {
2379                                 congestion_wait(BLK_RW_ASYNC,
2380                                                 DEFAULT_IO_TIMEOUT);
2381                                 goto retry;
2382                         }
2383                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2384                         break;
2385                 }
2386
2387                 kaddr = kmap_atomic(page);
2388                 memcpy(kaddr + offset, data, tocopy);
2389                 kunmap_atomic(kaddr);
2390                 flush_dcache_page(page);
2391
2392                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2393                                                 page, fsdata);
2394                 offset = 0;
2395                 towrite -= tocopy;
2396                 off += tocopy;
2397                 data += tocopy;
2398                 cond_resched();
2399         }
2400
2401         if (len == towrite)
2402                 return err;
2403         inode->i_mtime = inode->i_ctime = current_time(inode);
2404         f2fs_mark_inode_dirty_sync(inode, false);
2405         return len - towrite;
2406 }
2407
2408 static struct dquot **f2fs_get_dquots(struct inode *inode)
2409 {
2410         return F2FS_I(inode)->i_dquot;
2411 }
2412
2413 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2414 {
2415         return &F2FS_I(inode)->i_reserved_quota;
2416 }
2417
2418 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2419 {
2420         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2421                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2422                 return 0;
2423         }
2424
2425         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2426                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2427 }
2428
2429 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2430 {
2431         int enabled = 0;
2432         int i, err;
2433
2434         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2435                 err = f2fs_enable_quotas(sbi->sb);
2436                 if (err) {
2437                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2438                         return 0;
2439                 }
2440                 return 1;
2441         }
2442
2443         for (i = 0; i < MAXQUOTAS; i++) {
2444                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2445                         err = f2fs_quota_on_mount(sbi, i);
2446                         if (!err) {
2447                                 enabled = 1;
2448                                 continue;
2449                         }
2450                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2451                                  err, i);
2452                 }
2453         }
2454         return enabled;
2455 }
2456
2457 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2458                              unsigned int flags)
2459 {
2460         struct inode *qf_inode;
2461         unsigned long qf_inum;
2462         int err;
2463
2464         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2465
2466         qf_inum = f2fs_qf_ino(sb, type);
2467         if (!qf_inum)
2468                 return -EPERM;
2469
2470         qf_inode = f2fs_iget(sb, qf_inum);
2471         if (IS_ERR(qf_inode)) {
2472                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2473                 return PTR_ERR(qf_inode);
2474         }
2475
2476         /* Don't account quota for quota files to avoid recursion */
2477         qf_inode->i_flags |= S_NOQUOTA;
2478         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2479         iput(qf_inode);
2480         return err;
2481 }
2482
2483 static int f2fs_enable_quotas(struct super_block *sb)
2484 {
2485         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2486         int type, err = 0;
2487         unsigned long qf_inum;
2488         bool quota_mopt[MAXQUOTAS] = {
2489                 test_opt(sbi, USRQUOTA),
2490                 test_opt(sbi, GRPQUOTA),
2491                 test_opt(sbi, PRJQUOTA),
2492         };
2493
2494         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2495                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2496                 return 0;
2497         }
2498
2499         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2500
2501         for (type = 0; type < MAXQUOTAS; type++) {
2502                 qf_inum = f2fs_qf_ino(sb, type);
2503                 if (qf_inum) {
2504                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2505                                 DQUOT_USAGE_ENABLED |
2506                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2507                         if (err) {
2508                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2509                                          type, err);
2510                                 for (type--; type >= 0; type--)
2511                                         dquot_quota_off(sb, type);
2512                                 set_sbi_flag(F2FS_SB(sb),
2513                                                 SBI_QUOTA_NEED_REPAIR);
2514                                 return err;
2515                         }
2516                 }
2517         }
2518         return 0;
2519 }
2520
2521 int f2fs_quota_sync(struct super_block *sb, int type)
2522 {
2523         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2524         struct quota_info *dqopt = sb_dqopt(sb);
2525         int cnt;
2526         int ret;
2527
2528         /*
2529          * do_quotactl
2530          *  f2fs_quota_sync
2531          *  down_read(quota_sem)
2532          *  dquot_writeback_dquots()
2533          *  f2fs_dquot_commit
2534          *                            block_operation
2535          *                            down_read(quota_sem)
2536          */
2537         f2fs_lock_op(sbi);
2538
2539         down_read(&sbi->quota_sem);
2540         ret = dquot_writeback_dquots(sb, type);
2541         if (ret)
2542                 goto out;
2543
2544         /*
2545          * Now when everything is written we can discard the pagecache so
2546          * that userspace sees the changes.
2547          */
2548         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2549                 struct address_space *mapping;
2550
2551                 if (type != -1 && cnt != type)
2552                         continue;
2553                 if (!sb_has_quota_active(sb, cnt))
2554                         continue;
2555
2556                 mapping = dqopt->files[cnt]->i_mapping;
2557
2558                 ret = filemap_fdatawrite(mapping);
2559                 if (ret)
2560                         goto out;
2561
2562                 /* if we are using journalled quota */
2563                 if (is_journalled_quota(sbi))
2564                         continue;
2565
2566                 ret = filemap_fdatawait(mapping);
2567                 if (ret)
2568                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2569
2570                 inode_lock(dqopt->files[cnt]);
2571                 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
2572                 inode_unlock(dqopt->files[cnt]);
2573         }
2574 out:
2575         if (ret)
2576                 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2577         up_read(&sbi->quota_sem);
2578         f2fs_unlock_op(sbi);
2579         return ret;
2580 }
2581
2582 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2583                                                         const struct path *path)
2584 {
2585         struct inode *inode;
2586         int err;
2587
2588         /* if quota sysfile exists, deny enabling quota with specific file */
2589         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2590                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2591                 return -EBUSY;
2592         }
2593
2594         err = f2fs_quota_sync(sb, type);
2595         if (err)
2596                 return err;
2597
2598         err = dquot_quota_on(sb, type, format_id, path);
2599         if (err)
2600                 return err;
2601
2602         inode = d_inode(path->dentry);
2603
2604         inode_lock(inode);
2605         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2606         f2fs_set_inode_flags(inode);
2607         inode_unlock(inode);
2608         f2fs_mark_inode_dirty_sync(inode, false);
2609
2610         return 0;
2611 }
2612
2613 static int __f2fs_quota_off(struct super_block *sb, int type)
2614 {
2615         struct inode *inode = sb_dqopt(sb)->files[type];
2616         int err;
2617
2618         if (!inode || !igrab(inode))
2619                 return dquot_quota_off(sb, type);
2620
2621         err = f2fs_quota_sync(sb, type);
2622         if (err)
2623                 goto out_put;
2624
2625         err = dquot_quota_off(sb, type);
2626         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2627                 goto out_put;
2628
2629         inode_lock(inode);
2630         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2631         f2fs_set_inode_flags(inode);
2632         inode_unlock(inode);
2633         f2fs_mark_inode_dirty_sync(inode, false);
2634 out_put:
2635         iput(inode);
2636         return err;
2637 }
2638
2639 static int f2fs_quota_off(struct super_block *sb, int type)
2640 {
2641         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2642         int err;
2643
2644         err = __f2fs_quota_off(sb, type);
2645
2646         /*
2647          * quotactl can shutdown journalled quota, result in inconsistence
2648          * between quota record and fs data by following updates, tag the
2649          * flag to let fsck be aware of it.
2650          */
2651         if (is_journalled_quota(sbi))
2652                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2653         return err;
2654 }
2655
2656 void f2fs_quota_off_umount(struct super_block *sb)
2657 {
2658         int type;
2659         int err;
2660
2661         for (type = 0; type < MAXQUOTAS; type++) {
2662                 err = __f2fs_quota_off(sb, type);
2663                 if (err) {
2664                         int ret = dquot_quota_off(sb, type);
2665
2666                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2667                                  type, err, ret);
2668                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2669                 }
2670         }
2671         /*
2672          * In case of checkpoint=disable, we must flush quota blocks.
2673          * This can cause NULL exception for node_inode in end_io, since
2674          * put_super already dropped it.
2675          */
2676         sync_filesystem(sb);
2677 }
2678
2679 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2680 {
2681         struct quota_info *dqopt = sb_dqopt(sb);
2682         int type;
2683
2684         for (type = 0; type < MAXQUOTAS; type++) {
2685                 if (!dqopt->files[type])
2686                         continue;
2687                 f2fs_inode_synced(dqopt->files[type]);
2688         }
2689 }
2690
2691 static int f2fs_dquot_commit(struct dquot *dquot)
2692 {
2693         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2694         int ret;
2695
2696         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2697         ret = dquot_commit(dquot);
2698         if (ret < 0)
2699                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2700         up_read(&sbi->quota_sem);
2701         return ret;
2702 }
2703
2704 static int f2fs_dquot_acquire(struct dquot *dquot)
2705 {
2706         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2707         int ret;
2708
2709         down_read(&sbi->quota_sem);
2710         ret = dquot_acquire(dquot);
2711         if (ret < 0)
2712                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2713         up_read(&sbi->quota_sem);
2714         return ret;
2715 }
2716
2717 static int f2fs_dquot_release(struct dquot *dquot)
2718 {
2719         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2720         int ret = dquot_release(dquot);
2721
2722         if (ret < 0)
2723                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2724         return ret;
2725 }
2726
2727 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2728 {
2729         struct super_block *sb = dquot->dq_sb;
2730         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2731         int ret = dquot_mark_dquot_dirty(dquot);
2732
2733         /* if we are using journalled quota */
2734         if (is_journalled_quota(sbi))
2735                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2736
2737         return ret;
2738 }
2739
2740 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2741 {
2742         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2743         int ret = dquot_commit_info(sb, type);
2744
2745         if (ret < 0)
2746                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2747         return ret;
2748 }
2749
2750 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2751 {
2752         *projid = F2FS_I(inode)->i_projid;
2753         return 0;
2754 }
2755
2756 static const struct dquot_operations f2fs_quota_operations = {
2757         .get_reserved_space = f2fs_get_reserved_space,
2758         .write_dquot    = f2fs_dquot_commit,
2759         .acquire_dquot  = f2fs_dquot_acquire,
2760         .release_dquot  = f2fs_dquot_release,
2761         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2762         .write_info     = f2fs_dquot_commit_info,
2763         .alloc_dquot    = dquot_alloc,
2764         .destroy_dquot  = dquot_destroy,
2765         .get_projid     = f2fs_get_projid,
2766         .get_next_id    = dquot_get_next_id,
2767 };
2768
2769 static const struct quotactl_ops f2fs_quotactl_ops = {
2770         .quota_on       = f2fs_quota_on,
2771         .quota_off      = f2fs_quota_off,
2772         .quota_sync     = f2fs_quota_sync,
2773         .get_state      = dquot_get_state,
2774         .set_info       = dquot_set_dqinfo,
2775         .get_dqblk      = dquot_get_dqblk,
2776         .set_dqblk      = dquot_set_dqblk,
2777         .get_nextdqblk  = dquot_get_next_dqblk,
2778 };
2779 #else
2780 int f2fs_quota_sync(struct super_block *sb, int type)
2781 {
2782         return 0;
2783 }
2784
2785 void f2fs_quota_off_umount(struct super_block *sb)
2786 {
2787 }
2788 #endif
2789
2790 static const struct super_operations f2fs_sops = {
2791         .alloc_inode    = f2fs_alloc_inode,
2792         .free_inode     = f2fs_free_inode,
2793         .drop_inode     = f2fs_drop_inode,
2794         .write_inode    = f2fs_write_inode,
2795         .dirty_inode    = f2fs_dirty_inode,
2796         .show_options   = f2fs_show_options,
2797 #ifdef CONFIG_QUOTA
2798         .quota_read     = f2fs_quota_read,
2799         .quota_write    = f2fs_quota_write,
2800         .get_dquots     = f2fs_get_dquots,
2801 #endif
2802         .evict_inode    = f2fs_evict_inode,
2803         .put_super      = f2fs_put_super,
2804         .sync_fs        = f2fs_sync_fs,
2805         .freeze_fs      = f2fs_freeze,
2806         .unfreeze_fs    = f2fs_unfreeze,
2807         .statfs         = f2fs_statfs,
2808         .remount_fs     = f2fs_remount,
2809 };
2810
2811 #ifdef CONFIG_FS_ENCRYPTION
2812 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2813 {
2814         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2815                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2816                                 ctx, len, NULL);
2817 }
2818
2819 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2820                                                         void *fs_data)
2821 {
2822         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2823
2824         /*
2825          * Encrypting the root directory is not allowed because fsck
2826          * expects lost+found directory to exist and remain unencrypted
2827          * if LOST_FOUND feature is enabled.
2828          *
2829          */
2830         if (f2fs_sb_has_lost_found(sbi) &&
2831                         inode->i_ino == F2FS_ROOT_INO(sbi))
2832                 return -EPERM;
2833
2834         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2835                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2836                                 ctx, len, fs_data, XATTR_CREATE);
2837 }
2838
2839 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2840 {
2841         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2842 }
2843
2844 static bool f2fs_has_stable_inodes(struct super_block *sb)
2845 {
2846         return true;
2847 }
2848
2849 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2850                                        int *ino_bits_ret, int *lblk_bits_ret)
2851 {
2852         *ino_bits_ret = 8 * sizeof(nid_t);
2853         *lblk_bits_ret = 8 * sizeof(block_t);
2854 }
2855
2856 static int f2fs_get_num_devices(struct super_block *sb)
2857 {
2858         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2859
2860         if (f2fs_is_multi_device(sbi))
2861                 return sbi->s_ndevs;
2862         return 1;
2863 }
2864
2865 static void f2fs_get_devices(struct super_block *sb,
2866                              struct request_queue **devs)
2867 {
2868         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2869         int i;
2870
2871         for (i = 0; i < sbi->s_ndevs; i++)
2872                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2873 }
2874
2875 static const struct fscrypt_operations f2fs_cryptops = {
2876         .key_prefix             = "f2fs:",
2877         .get_context            = f2fs_get_context,
2878         .set_context            = f2fs_set_context,
2879         .get_dummy_policy       = f2fs_get_dummy_policy,
2880         .empty_dir              = f2fs_empty_dir,
2881         .max_namelen            = F2FS_NAME_LEN,
2882         .has_stable_inodes      = f2fs_has_stable_inodes,
2883         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2884         .get_num_devices        = f2fs_get_num_devices,
2885         .get_devices            = f2fs_get_devices,
2886 };
2887 #endif
2888
2889 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2890                 u64 ino, u32 generation)
2891 {
2892         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2893         struct inode *inode;
2894
2895         if (f2fs_check_nid_range(sbi, ino))
2896                 return ERR_PTR(-ESTALE);
2897
2898         /*
2899          * f2fs_iget isn't quite right if the inode is currently unallocated!
2900          * However f2fs_iget currently does appropriate checks to handle stale
2901          * inodes so everything is OK.
2902          */
2903         inode = f2fs_iget(sb, ino);
2904         if (IS_ERR(inode))
2905                 return ERR_CAST(inode);
2906         if (unlikely(generation && inode->i_generation != generation)) {
2907                 /* we didn't find the right inode.. */
2908                 iput(inode);
2909                 return ERR_PTR(-ESTALE);
2910         }
2911         return inode;
2912 }
2913
2914 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2915                 int fh_len, int fh_type)
2916 {
2917         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2918                                     f2fs_nfs_get_inode);
2919 }
2920
2921 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2922                 int fh_len, int fh_type)
2923 {
2924         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2925                                     f2fs_nfs_get_inode);
2926 }
2927
2928 static const struct export_operations f2fs_export_ops = {
2929         .fh_to_dentry = f2fs_fh_to_dentry,
2930         .fh_to_parent = f2fs_fh_to_parent,
2931         .get_parent = f2fs_get_parent,
2932 };
2933
2934 loff_t max_file_blocks(struct inode *inode)
2935 {
2936         loff_t result = 0;
2937         loff_t leaf_count;
2938
2939         /*
2940          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2941          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2942          * space in inode.i_addr, it will be more safe to reassign
2943          * result as zero.
2944          */
2945
2946         if (inode && f2fs_compressed_file(inode))
2947                 leaf_count = ADDRS_PER_BLOCK(inode);
2948         else
2949                 leaf_count = DEF_ADDRS_PER_BLOCK;
2950
2951         /* two direct node blocks */
2952         result += (leaf_count * 2);
2953
2954         /* two indirect node blocks */
2955         leaf_count *= NIDS_PER_BLOCK;
2956         result += (leaf_count * 2);
2957
2958         /* one double indirect node block */
2959         leaf_count *= NIDS_PER_BLOCK;
2960         result += leaf_count;
2961
2962         return result;
2963 }
2964
2965 static int __f2fs_commit_super(struct buffer_head *bh,
2966                         struct f2fs_super_block *super)
2967 {
2968         lock_buffer(bh);
2969         if (super)
2970                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2971         set_buffer_dirty(bh);
2972         unlock_buffer(bh);
2973
2974         /* it's rare case, we can do fua all the time */
2975         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2976 }
2977
2978 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2979                                         struct buffer_head *bh)
2980 {
2981         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2982                                         (bh->b_data + F2FS_SUPER_OFFSET);
2983         struct super_block *sb = sbi->sb;
2984         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2985         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2986         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2987         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2988         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2989         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2990         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2991         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2992         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2993         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2994         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2995         u32 segment_count = le32_to_cpu(raw_super->segment_count);
2996         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2997         u64 main_end_blkaddr = main_blkaddr +
2998                                 (segment_count_main << log_blocks_per_seg);
2999         u64 seg_end_blkaddr = segment0_blkaddr +
3000                                 (segment_count << log_blocks_per_seg);
3001
3002         if (segment0_blkaddr != cp_blkaddr) {
3003                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3004                           segment0_blkaddr, cp_blkaddr);
3005                 return true;
3006         }
3007
3008         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3009                                                         sit_blkaddr) {
3010                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3011                           cp_blkaddr, sit_blkaddr,
3012                           segment_count_ckpt << log_blocks_per_seg);
3013                 return true;
3014         }
3015
3016         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3017                                                         nat_blkaddr) {
3018                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3019                           sit_blkaddr, nat_blkaddr,
3020                           segment_count_sit << log_blocks_per_seg);
3021                 return true;
3022         }
3023
3024         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3025                                                         ssa_blkaddr) {
3026                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3027                           nat_blkaddr, ssa_blkaddr,
3028                           segment_count_nat << log_blocks_per_seg);
3029                 return true;
3030         }
3031
3032         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3033                                                         main_blkaddr) {
3034                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3035                           ssa_blkaddr, main_blkaddr,
3036                           segment_count_ssa << log_blocks_per_seg);
3037                 return true;
3038         }
3039
3040         if (main_end_blkaddr > seg_end_blkaddr) {
3041                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3042                           main_blkaddr, seg_end_blkaddr,
3043                           segment_count_main << log_blocks_per_seg);
3044                 return true;
3045         } else if (main_end_blkaddr < seg_end_blkaddr) {
3046                 int err = 0;
3047                 char *res;
3048
3049                 /* fix in-memory information all the time */
3050                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3051                                 segment0_blkaddr) >> log_blocks_per_seg);
3052
3053                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3054                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3055                         res = "internally";
3056                 } else {
3057                         err = __f2fs_commit_super(bh, NULL);
3058                         res = err ? "failed" : "done";
3059                 }
3060                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3061                           res, main_blkaddr, seg_end_blkaddr,
3062                           segment_count_main << log_blocks_per_seg);
3063                 if (err)
3064                         return true;
3065         }
3066         return false;
3067 }
3068
3069 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3070                                 struct buffer_head *bh)
3071 {
3072         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3073         block_t total_sections, blocks_per_seg;
3074         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3075                                         (bh->b_data + F2FS_SUPER_OFFSET);
3076         size_t crc_offset = 0;
3077         __u32 crc = 0;
3078
3079         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3080                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3081                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3082                 return -EINVAL;
3083         }
3084
3085         /* Check checksum_offset and crc in superblock */
3086         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3087                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3088                 if (crc_offset !=
3089                         offsetof(struct f2fs_super_block, crc)) {
3090                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3091                                   crc_offset);
3092                         return -EFSCORRUPTED;
3093                 }
3094                 crc = le32_to_cpu(raw_super->crc);
3095                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3096                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3097                         return -EFSCORRUPTED;
3098                 }
3099         }
3100
3101         /* Currently, support only 4KB block size */
3102         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3103                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3104                           le32_to_cpu(raw_super->log_blocksize),
3105                           F2FS_BLKSIZE_BITS);
3106                 return -EFSCORRUPTED;
3107         }
3108
3109         /* check log blocks per segment */
3110         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3111                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3112                           le32_to_cpu(raw_super->log_blocks_per_seg));
3113                 return -EFSCORRUPTED;
3114         }
3115
3116         /* Currently, support 512/1024/2048/4096 bytes sector size */
3117         if (le32_to_cpu(raw_super->log_sectorsize) >
3118                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3119                 le32_to_cpu(raw_super->log_sectorsize) <
3120                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3121                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3122                           le32_to_cpu(raw_super->log_sectorsize));
3123                 return -EFSCORRUPTED;
3124         }
3125         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3126                 le32_to_cpu(raw_super->log_sectorsize) !=
3127                         F2FS_MAX_LOG_SECTOR_SIZE) {
3128                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3129                           le32_to_cpu(raw_super->log_sectors_per_block),
3130                           le32_to_cpu(raw_super->log_sectorsize));
3131                 return -EFSCORRUPTED;
3132         }
3133
3134         segment_count = le32_to_cpu(raw_super->segment_count);
3135         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3136         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3137         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3138         total_sections = le32_to_cpu(raw_super->section_count);
3139
3140         /* blocks_per_seg should be 512, given the above check */
3141         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3142
3143         if (segment_count > F2FS_MAX_SEGMENT ||
3144                                 segment_count < F2FS_MIN_SEGMENTS) {
3145                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3146                 return -EFSCORRUPTED;
3147         }
3148
3149         if (total_sections > segment_count_main || total_sections < 1 ||
3150                         segs_per_sec > segment_count || !segs_per_sec) {
3151                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3152                           segment_count, total_sections, segs_per_sec);
3153                 return -EFSCORRUPTED;
3154         }
3155
3156         if (segment_count_main != total_sections * segs_per_sec) {
3157                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3158                           segment_count_main, total_sections, segs_per_sec);
3159                 return -EFSCORRUPTED;
3160         }
3161
3162         if ((segment_count / segs_per_sec) < total_sections) {
3163                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3164                           segment_count, segs_per_sec, total_sections);
3165                 return -EFSCORRUPTED;
3166         }
3167
3168         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3169                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3170                           segment_count, le64_to_cpu(raw_super->block_count));
3171                 return -EFSCORRUPTED;
3172         }
3173
3174         if (RDEV(0).path[0]) {
3175                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3176                 int i = 1;
3177
3178                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3179                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3180                         i++;
3181                 }
3182                 if (segment_count != dev_seg_count) {
3183                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3184                                         segment_count, dev_seg_count);
3185                         return -EFSCORRUPTED;
3186                 }
3187         } else {
3188                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3189                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3190                         f2fs_info(sbi, "Zoned block device path is missing");
3191                         return -EFSCORRUPTED;
3192                 }
3193         }
3194
3195         if (secs_per_zone > total_sections || !secs_per_zone) {
3196                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3197                           secs_per_zone, total_sections);
3198                 return -EFSCORRUPTED;
3199         }
3200         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3201                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3202                         (le32_to_cpu(raw_super->extension_count) +
3203                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3204                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3205                           le32_to_cpu(raw_super->extension_count),
3206                           raw_super->hot_ext_count,
3207                           F2FS_MAX_EXTENSION);
3208                 return -EFSCORRUPTED;
3209         }
3210
3211         if (le32_to_cpu(raw_super->cp_payload) >
3212                                 (blocks_per_seg - F2FS_CP_PACKS)) {
3213                 f2fs_info(sbi, "Insane cp_payload (%u > %u)",
3214                           le32_to_cpu(raw_super->cp_payload),
3215                           blocks_per_seg - F2FS_CP_PACKS);
3216                 return -EFSCORRUPTED;
3217         }
3218
3219         /* check reserved ino info */
3220         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3221                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3222                 le32_to_cpu(raw_super->root_ino) != 3) {
3223                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3224                           le32_to_cpu(raw_super->node_ino),
3225                           le32_to_cpu(raw_super->meta_ino),
3226                           le32_to_cpu(raw_super->root_ino));
3227                 return -EFSCORRUPTED;
3228         }
3229
3230         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3231         if (sanity_check_area_boundary(sbi, bh))
3232                 return -EFSCORRUPTED;
3233
3234         return 0;
3235 }
3236
3237 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3238 {
3239         unsigned int total, fsmeta;
3240         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3241         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3242         unsigned int ovp_segments, reserved_segments;
3243         unsigned int main_segs, blocks_per_seg;
3244         unsigned int sit_segs, nat_segs;
3245         unsigned int sit_bitmap_size, nat_bitmap_size;
3246         unsigned int log_blocks_per_seg;
3247         unsigned int segment_count_main;
3248         unsigned int cp_pack_start_sum, cp_payload;
3249         block_t user_block_count, valid_user_blocks;
3250         block_t avail_node_count, valid_node_count;
3251         int i, j;
3252
3253         total = le32_to_cpu(raw_super->segment_count);
3254         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3255         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3256         fsmeta += sit_segs;
3257         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3258         fsmeta += nat_segs;
3259         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3260         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3261
3262         if (unlikely(fsmeta >= total))
3263                 return 1;
3264
3265         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3266         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3267
3268         if (!f2fs_sb_has_readonly(sbi) &&
3269                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3270                         ovp_segments == 0 || reserved_segments == 0)) {
3271                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3272                 return 1;
3273         }
3274         user_block_count = le64_to_cpu(ckpt->user_block_count);
3275         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3276                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3277         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3278         if (!user_block_count || user_block_count >=
3279                         segment_count_main << log_blocks_per_seg) {
3280                 f2fs_err(sbi, "Wrong user_block_count: %u",
3281                          user_block_count);
3282                 return 1;
3283         }
3284
3285         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3286         if (valid_user_blocks > user_block_count) {
3287                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3288                          valid_user_blocks, user_block_count);
3289                 return 1;
3290         }
3291
3292         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3293         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3294         if (valid_node_count > avail_node_count) {
3295                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3296                          valid_node_count, avail_node_count);
3297                 return 1;
3298         }
3299
3300         main_segs = le32_to_cpu(raw_super->segment_count_main);
3301         blocks_per_seg = sbi->blocks_per_seg;
3302
3303         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3304                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3305                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3306                         return 1;
3307
3308                 if (f2fs_sb_has_readonly(sbi))
3309                         goto check_data;
3310
3311                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3312                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3313                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3314                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3315                                          i, j,
3316                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3317                                 return 1;
3318                         }
3319                 }
3320         }
3321 check_data:
3322         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3323                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3324                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3325                         return 1;
3326
3327                 if (f2fs_sb_has_readonly(sbi))
3328                         goto skip_cross;
3329
3330                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3331                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3332                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3333                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3334                                          i, j,
3335                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3336                                 return 1;
3337                         }
3338                 }
3339         }
3340         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3341                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3342                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3343                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3344                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3345                                          i, j,
3346                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3347                                 return 1;
3348                         }
3349                 }
3350         }
3351 skip_cross:
3352         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3353         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3354
3355         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3356                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3357                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3358                          sit_bitmap_size, nat_bitmap_size);
3359                 return 1;
3360         }
3361
3362         cp_pack_start_sum = __start_sum_addr(sbi);
3363         cp_payload = __cp_payload(sbi);
3364         if (cp_pack_start_sum < cp_payload + 1 ||
3365                 cp_pack_start_sum > blocks_per_seg - 1 -
3366                         NR_CURSEG_PERSIST_TYPE) {
3367                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3368                          cp_pack_start_sum);
3369                 return 1;
3370         }
3371
3372         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3373                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3374                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3375                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3376                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3377                           le32_to_cpu(ckpt->checksum_offset));
3378                 return 1;
3379         }
3380
3381         if (unlikely(f2fs_cp_error(sbi))) {
3382                 f2fs_err(sbi, "A bug case: need to run fsck");
3383                 return 1;
3384         }
3385         return 0;
3386 }
3387
3388 static void init_sb_info(struct f2fs_sb_info *sbi)
3389 {
3390         struct f2fs_super_block *raw_super = sbi->raw_super;
3391         int i;
3392
3393         sbi->log_sectors_per_block =
3394                 le32_to_cpu(raw_super->log_sectors_per_block);
3395         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3396         sbi->blocksize = 1 << sbi->log_blocksize;
3397         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3398         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3399         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3400         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3401         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3402         sbi->total_node_count =
3403                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3404                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3405         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3406         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3407         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3408         sbi->cur_victim_sec = NULL_SECNO;
3409         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3410         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3411         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3412         sbi->migration_granularity = sbi->segs_per_sec;
3413
3414         sbi->dir_level = DEF_DIR_LEVEL;
3415         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3416         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3417         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3418         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3419         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3420         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3421                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3422         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3423
3424         for (i = 0; i < NR_COUNT_TYPE; i++)
3425                 atomic_set(&sbi->nr_pages[i], 0);
3426
3427         for (i = 0; i < META; i++)
3428                 atomic_set(&sbi->wb_sync_req[i], 0);
3429
3430         INIT_LIST_HEAD(&sbi->s_list);
3431         mutex_init(&sbi->umount_mutex);
3432         init_rwsem(&sbi->io_order_lock);
3433         spin_lock_init(&sbi->cp_lock);
3434
3435         sbi->dirty_device = 0;
3436         spin_lock_init(&sbi->dev_lock);
3437
3438         init_rwsem(&sbi->sb_lock);
3439         init_rwsem(&sbi->pin_sem);
3440 }
3441
3442 static int init_percpu_info(struct f2fs_sb_info *sbi)
3443 {
3444         int err;
3445
3446         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3447         if (err)
3448                 return err;
3449
3450         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3451                                                                 GFP_KERNEL);
3452         if (err)
3453                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3454
3455         return err;
3456 }
3457
3458 #ifdef CONFIG_BLK_DEV_ZONED
3459
3460 struct f2fs_report_zones_args {
3461         struct f2fs_dev_info *dev;
3462         bool zone_cap_mismatch;
3463 };
3464
3465 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3466                               void *data)
3467 {
3468         struct f2fs_report_zones_args *rz_args = data;
3469
3470         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3471                 return 0;
3472
3473         set_bit(idx, rz_args->dev->blkz_seq);
3474         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3475                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3476         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3477                 rz_args->zone_cap_mismatch = true;
3478
3479         return 0;
3480 }
3481
3482 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3483 {
3484         struct block_device *bdev = FDEV(devi).bdev;
3485         sector_t nr_sectors = bdev_nr_sectors(bdev);
3486         struct f2fs_report_zones_args rep_zone_arg;
3487         int ret;
3488
3489         if (!f2fs_sb_has_blkzoned(sbi))
3490                 return 0;
3491
3492         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3493                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3494                 return -EINVAL;
3495         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3496         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3497                                 __ilog2_u32(sbi->blocks_per_blkz))
3498                 return -EINVAL;
3499         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3500         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3501                                         sbi->log_blocks_per_blkz;
3502         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3503                 FDEV(devi).nr_blkz++;
3504
3505         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3506                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3507                                         * sizeof(unsigned long),
3508                                         GFP_KERNEL);
3509         if (!FDEV(devi).blkz_seq)
3510                 return -ENOMEM;
3511
3512         /* Get block zones type and zone-capacity */
3513         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3514                                         FDEV(devi).nr_blkz * sizeof(block_t),
3515                                         GFP_KERNEL);
3516         if (!FDEV(devi).zone_capacity_blocks)
3517                 return -ENOMEM;
3518
3519         rep_zone_arg.dev = &FDEV(devi);
3520         rep_zone_arg.zone_cap_mismatch = false;
3521
3522         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3523                                   &rep_zone_arg);
3524         if (ret < 0)
3525                 return ret;
3526
3527         if (!rep_zone_arg.zone_cap_mismatch) {
3528                 kfree(FDEV(devi).zone_capacity_blocks);
3529                 FDEV(devi).zone_capacity_blocks = NULL;
3530         }
3531
3532         return 0;
3533 }
3534 #endif
3535
3536 /*
3537  * Read f2fs raw super block.
3538  * Because we have two copies of super block, so read both of them
3539  * to get the first valid one. If any one of them is broken, we pass
3540  * them recovery flag back to the caller.
3541  */
3542 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3543                         struct f2fs_super_block **raw_super,
3544                         int *valid_super_block, int *recovery)
3545 {
3546         struct super_block *sb = sbi->sb;
3547         int block;
3548         struct buffer_head *bh;
3549         struct f2fs_super_block *super;
3550         int err = 0;
3551
3552         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3553         if (!super)
3554                 return -ENOMEM;
3555
3556         for (block = 0; block < 2; block++) {
3557                 bh = sb_bread(sb, block);
3558                 if (!bh) {
3559                         f2fs_err(sbi, "Unable to read %dth superblock",
3560                                  block + 1);
3561                         err = -EIO;
3562                         *recovery = 1;
3563                         continue;
3564                 }
3565
3566                 /* sanity checking of raw super */
3567                 err = sanity_check_raw_super(sbi, bh);
3568                 if (err) {
3569                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3570                                  block + 1);
3571                         brelse(bh);
3572                         *recovery = 1;
3573                         continue;
3574                 }
3575
3576                 if (!*raw_super) {
3577                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3578                                                         sizeof(*super));
3579                         *valid_super_block = block;
3580                         *raw_super = super;
3581                 }
3582                 brelse(bh);
3583         }
3584
3585         /* No valid superblock */
3586         if (!*raw_super)
3587                 kfree(super);
3588         else
3589                 err = 0;
3590
3591         return err;
3592 }
3593
3594 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3595 {
3596         struct buffer_head *bh;
3597         __u32 crc = 0;
3598         int err;
3599
3600         if ((recover && f2fs_readonly(sbi->sb)) ||
3601                                 bdev_read_only(sbi->sb->s_bdev)) {
3602                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3603                 return -EROFS;
3604         }
3605
3606         /* we should update superblock crc here */
3607         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3608                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3609                                 offsetof(struct f2fs_super_block, crc));
3610                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3611         }
3612
3613         /* write back-up superblock first */
3614         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3615         if (!bh)
3616                 return -EIO;
3617         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3618         brelse(bh);
3619
3620         /* if we are in recovery path, skip writing valid superblock */
3621         if (recover || err)
3622                 return err;
3623
3624         /* write current valid superblock */
3625         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3626         if (!bh)
3627                 return -EIO;
3628         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3629         brelse(bh);
3630         return err;
3631 }
3632
3633 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3634 {
3635         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3636         unsigned int max_devices = MAX_DEVICES;
3637         int i;
3638
3639         /* Initialize single device information */
3640         if (!RDEV(0).path[0]) {
3641                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3642                         return 0;
3643                 max_devices = 1;
3644         }
3645
3646         /*
3647          * Initialize multiple devices information, or single
3648          * zoned block device information.
3649          */
3650         sbi->devs = f2fs_kzalloc(sbi,
3651                                  array_size(max_devices,
3652                                             sizeof(struct f2fs_dev_info)),
3653                                  GFP_KERNEL);
3654         if (!sbi->devs)
3655                 return -ENOMEM;
3656
3657         for (i = 0; i < max_devices; i++) {
3658
3659                 if (i > 0 && !RDEV(i).path[0])
3660                         break;
3661
3662                 if (max_devices == 1) {
3663                         /* Single zoned block device mount */
3664                         FDEV(0).bdev =
3665                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3666                                         sbi->sb->s_mode, sbi->sb->s_type);
3667                 } else {
3668                         /* Multi-device mount */
3669                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3670                         FDEV(i).total_segments =
3671                                 le32_to_cpu(RDEV(i).total_segments);
3672                         if (i == 0) {
3673                                 FDEV(i).start_blk = 0;
3674                                 FDEV(i).end_blk = FDEV(i).start_blk +
3675                                     (FDEV(i).total_segments <<
3676                                     sbi->log_blocks_per_seg) - 1 +
3677                                     le32_to_cpu(raw_super->segment0_blkaddr);
3678                         } else {
3679                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3680                                 FDEV(i).end_blk = FDEV(i).start_blk +
3681                                         (FDEV(i).total_segments <<
3682                                         sbi->log_blocks_per_seg) - 1;
3683                         }
3684                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3685                                         sbi->sb->s_mode, sbi->sb->s_type);
3686                 }
3687                 if (IS_ERR(FDEV(i).bdev))
3688                         return PTR_ERR(FDEV(i).bdev);
3689
3690                 /* to release errored devices */
3691                 sbi->s_ndevs = i + 1;
3692
3693 #ifdef CONFIG_BLK_DEV_ZONED
3694                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3695                                 !f2fs_sb_has_blkzoned(sbi)) {
3696                         f2fs_err(sbi, "Zoned block device feature not enabled");
3697                         return -EINVAL;
3698                 }
3699                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3700                         if (init_blkz_info(sbi, i)) {
3701                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3702                                 return -EINVAL;
3703                         }
3704                         if (max_devices == 1)
3705                                 break;
3706                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3707                                   i, FDEV(i).path,
3708                                   FDEV(i).total_segments,
3709                                   FDEV(i).start_blk, FDEV(i).end_blk,
3710                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3711                                   "Host-aware" : "Host-managed");
3712                         continue;
3713                 }
3714 #endif
3715                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3716                           i, FDEV(i).path,
3717                           FDEV(i).total_segments,
3718                           FDEV(i).start_blk, FDEV(i).end_blk);
3719         }
3720         f2fs_info(sbi,
3721                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3722         return 0;
3723 }
3724
3725 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3726 {
3727 #ifdef CONFIG_UNICODE
3728         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3729                 const struct f2fs_sb_encodings *encoding_info;
3730                 struct unicode_map *encoding;
3731                 __u16 encoding_flags;
3732
3733                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3734                                           &encoding_flags)) {
3735                         f2fs_err(sbi,
3736                                  "Encoding requested by superblock is unknown");
3737                         return -EINVAL;
3738                 }
3739
3740                 encoding = utf8_load(encoding_info->version);
3741                 if (IS_ERR(encoding)) {
3742                         f2fs_err(sbi,
3743                                  "can't mount with superblock charset: %s-%s "
3744                                  "not supported by the kernel. flags: 0x%x.",
3745                                  encoding_info->name, encoding_info->version,
3746                                  encoding_flags);
3747                         return PTR_ERR(encoding);
3748                 }
3749                 f2fs_info(sbi, "Using encoding defined by superblock: "
3750                          "%s-%s with flags 0x%hx", encoding_info->name,
3751                          encoding_info->version?:"\b", encoding_flags);
3752
3753                 sbi->sb->s_encoding = encoding;
3754                 sbi->sb->s_encoding_flags = encoding_flags;
3755         }
3756 #else
3757         if (f2fs_sb_has_casefold(sbi)) {
3758                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3759                 return -EINVAL;
3760         }
3761 #endif
3762         return 0;
3763 }
3764
3765 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3766 {
3767         struct f2fs_sm_info *sm_i = SM_I(sbi);
3768
3769         /* adjust parameters according to the volume size */
3770         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3771                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3772                 sm_i->dcc_info->discard_granularity = 1;
3773                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3774         }
3775
3776         sbi->readdir_ra = 1;
3777 }
3778
3779 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3780 {
3781         struct f2fs_sb_info *sbi;
3782         struct f2fs_super_block *raw_super;
3783         struct inode *root;
3784         int err;
3785         bool skip_recovery = false, need_fsck = false;
3786         char *options = NULL;
3787         int recovery, i, valid_super_block;
3788         struct curseg_info *seg_i;
3789         int retry_cnt = 1;
3790
3791 try_onemore:
3792         err = -EINVAL;
3793         raw_super = NULL;
3794         valid_super_block = -1;
3795         recovery = 0;
3796
3797         /* allocate memory for f2fs-specific super block info */
3798         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3799         if (!sbi)
3800                 return -ENOMEM;
3801
3802         sbi->sb = sb;
3803
3804         /* Load the checksum driver */
3805         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3806         if (IS_ERR(sbi->s_chksum_driver)) {
3807                 f2fs_err(sbi, "Cannot load crc32 driver.");
3808                 err = PTR_ERR(sbi->s_chksum_driver);
3809                 sbi->s_chksum_driver = NULL;
3810                 goto free_sbi;
3811         }
3812
3813         /* set a block size */
3814         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3815                 f2fs_err(sbi, "unable to set blocksize");
3816                 goto free_sbi;
3817         }
3818
3819         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3820                                                                 &recovery);
3821         if (err)
3822                 goto free_sbi;
3823
3824         sb->s_fs_info = sbi;
3825         sbi->raw_super = raw_super;
3826
3827         /* precompute checksum seed for metadata */
3828         if (f2fs_sb_has_inode_chksum(sbi))
3829                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3830                                                 sizeof(raw_super->uuid));
3831
3832         default_options(sbi);
3833         /* parse mount options */
3834         options = kstrdup((const char *)data, GFP_KERNEL);
3835         if (data && !options) {
3836                 err = -ENOMEM;
3837                 goto free_sb_buf;
3838         }
3839
3840         err = parse_options(sb, options, false);
3841         if (err)
3842                 goto free_options;
3843
3844         sb->s_maxbytes = max_file_blocks(NULL) <<
3845                                 le32_to_cpu(raw_super->log_blocksize);
3846         sb->s_max_links = F2FS_LINK_MAX;
3847
3848         err = f2fs_setup_casefold(sbi);
3849         if (err)
3850                 goto free_options;
3851
3852 #ifdef CONFIG_QUOTA
3853         sb->dq_op = &f2fs_quota_operations;
3854         sb->s_qcop = &f2fs_quotactl_ops;
3855         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3856
3857         if (f2fs_sb_has_quota_ino(sbi)) {
3858                 for (i = 0; i < MAXQUOTAS; i++) {
3859                         if (f2fs_qf_ino(sbi->sb, i))
3860                                 sbi->nquota_files++;
3861                 }
3862         }
3863 #endif
3864
3865         sb->s_op = &f2fs_sops;
3866 #ifdef CONFIG_FS_ENCRYPTION
3867         sb->s_cop = &f2fs_cryptops;
3868 #endif
3869 #ifdef CONFIG_FS_VERITY
3870         sb->s_vop = &f2fs_verityops;
3871 #endif
3872         sb->s_xattr = f2fs_xattr_handlers;
3873         sb->s_export_op = &f2fs_export_ops;
3874         sb->s_magic = F2FS_SUPER_MAGIC;
3875         sb->s_time_gran = 1;
3876         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3877                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3878         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3879         sb->s_iflags |= SB_I_CGROUPWB;
3880
3881         /* init f2fs-specific super block info */
3882         sbi->valid_super_block = valid_super_block;
3883         init_rwsem(&sbi->gc_lock);
3884         mutex_init(&sbi->writepages);
3885         init_rwsem(&sbi->cp_global_sem);
3886         init_rwsem(&sbi->node_write);
3887         init_rwsem(&sbi->node_change);
3888
3889         /* disallow all the data/node/meta page writes */
3890         set_sbi_flag(sbi, SBI_POR_DOING);
3891         spin_lock_init(&sbi->stat_lock);
3892
3893         /* init iostat info */
3894         spin_lock_init(&sbi->iostat_lock);
3895         sbi->iostat_enable = false;
3896         sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
3897
3898         for (i = 0; i < NR_PAGE_TYPE; i++) {
3899                 int n = (i == META) ? 1 : NR_TEMP_TYPE;
3900                 int j;
3901
3902                 sbi->write_io[i] =
3903                         f2fs_kmalloc(sbi,
3904                                      array_size(n,
3905                                                 sizeof(struct f2fs_bio_info)),
3906                                      GFP_KERNEL);
3907                 if (!sbi->write_io[i]) {
3908                         err = -ENOMEM;
3909                         goto free_bio_info;
3910                 }
3911
3912                 for (j = HOT; j < n; j++) {
3913                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
3914                         sbi->write_io[i][j].sbi = sbi;
3915                         sbi->write_io[i][j].bio = NULL;
3916                         spin_lock_init(&sbi->write_io[i][j].io_lock);
3917                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3918                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3919                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3920                 }
3921         }
3922
3923         init_rwsem(&sbi->cp_rwsem);
3924         init_rwsem(&sbi->quota_sem);
3925         init_waitqueue_head(&sbi->cp_wait);
3926         init_sb_info(sbi);
3927
3928         err = init_percpu_info(sbi);
3929         if (err)
3930                 goto free_bio_info;
3931
3932         if (F2FS_IO_ALIGNED(sbi)) {
3933                 sbi->write_io_dummy =
3934                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3935                 if (!sbi->write_io_dummy) {
3936                         err = -ENOMEM;
3937                         goto free_percpu;
3938                 }
3939         }
3940
3941         /* init per sbi slab cache */
3942         err = f2fs_init_xattr_caches(sbi);
3943         if (err)
3944                 goto free_io_dummy;
3945         err = f2fs_init_page_array_cache(sbi);
3946         if (err)
3947                 goto free_xattr_cache;
3948
3949         /* get an inode for meta space */
3950         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3951         if (IS_ERR(sbi->meta_inode)) {
3952                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3953                 err = PTR_ERR(sbi->meta_inode);
3954                 goto free_page_array_cache;
3955         }
3956
3957         err = f2fs_get_valid_checkpoint(sbi);
3958         if (err) {
3959                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3960                 goto free_meta_inode;
3961         }
3962
3963         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3964                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3965         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3966                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3967                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3968         }
3969
3970         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3971                 set_sbi_flag(sbi, SBI_NEED_FSCK);
3972
3973         /* Initialize device list */
3974         err = f2fs_scan_devices(sbi);
3975         if (err) {
3976                 f2fs_err(sbi, "Failed to find devices");
3977                 goto free_devices;
3978         }
3979
3980         err = f2fs_init_post_read_wq(sbi);
3981         if (err) {
3982                 f2fs_err(sbi, "Failed to initialize post read workqueue");
3983                 goto free_devices;
3984         }
3985
3986         sbi->total_valid_node_count =
3987                                 le32_to_cpu(sbi->ckpt->valid_node_count);
3988         percpu_counter_set(&sbi->total_valid_inode_count,
3989                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
3990         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3991         sbi->total_valid_block_count =
3992                                 le64_to_cpu(sbi->ckpt->valid_block_count);
3993         sbi->last_valid_block_count = sbi->total_valid_block_count;
3994         sbi->reserved_blocks = 0;
3995         sbi->current_reserved_blocks = 0;
3996         limit_reserve_root(sbi);
3997         adjust_unusable_cap_perc(sbi);
3998
3999         for (i = 0; i < NR_INODE_TYPE; i++) {
4000                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4001                 spin_lock_init(&sbi->inode_lock[i]);
4002         }
4003         mutex_init(&sbi->flush_lock);
4004
4005         f2fs_init_extent_cache_info(sbi);
4006
4007         f2fs_init_ino_entry_info(sbi);
4008
4009         f2fs_init_fsync_node_info(sbi);
4010
4011         /* setup checkpoint request control and start checkpoint issue thread */
4012         f2fs_init_ckpt_req_control(sbi);
4013         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4014                         test_opt(sbi, MERGE_CHECKPOINT)) {
4015                 err = f2fs_start_ckpt_thread(sbi);
4016                 if (err) {
4017                         f2fs_err(sbi,
4018                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4019                             err);
4020                         goto stop_ckpt_thread;
4021                 }
4022         }
4023
4024         /* setup f2fs internal modules */
4025         err = f2fs_build_segment_manager(sbi);
4026         if (err) {
4027                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4028                          err);
4029                 goto free_sm;
4030         }
4031         err = f2fs_build_node_manager(sbi);
4032         if (err) {
4033                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4034                          err);
4035                 goto free_nm;
4036         }
4037
4038         /* For write statistics */
4039         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4040
4041         /* Read accumulated write IO statistics if exists */
4042         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4043         if (__exist_node_summaries(sbi))
4044                 sbi->kbytes_written =
4045                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4046
4047         f2fs_build_gc_manager(sbi);
4048
4049         err = f2fs_build_stats(sbi);
4050         if (err)
4051                 goto free_nm;
4052
4053         /* get an inode for node space */
4054         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4055         if (IS_ERR(sbi->node_inode)) {
4056                 f2fs_err(sbi, "Failed to read node inode");
4057                 err = PTR_ERR(sbi->node_inode);
4058                 goto free_stats;
4059         }
4060
4061         /* read root inode and dentry */
4062         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4063         if (IS_ERR(root)) {
4064                 f2fs_err(sbi, "Failed to read root inode");
4065                 err = PTR_ERR(root);
4066                 goto free_node_inode;
4067         }
4068         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4069                         !root->i_size || !root->i_nlink) {
4070                 iput(root);
4071                 err = -EINVAL;
4072                 goto free_node_inode;
4073         }
4074
4075         sb->s_root = d_make_root(root); /* allocate root dentry */
4076         if (!sb->s_root) {
4077                 err = -ENOMEM;
4078                 goto free_node_inode;
4079         }
4080
4081         err = f2fs_init_compress_inode(sbi);
4082         if (err)
4083                 goto free_root_inode;
4084
4085         err = f2fs_register_sysfs(sbi);
4086         if (err)
4087                 goto free_compress_inode;
4088
4089 #ifdef CONFIG_QUOTA
4090         /* Enable quota usage during mount */
4091         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4092                 err = f2fs_enable_quotas(sb);
4093                 if (err)
4094                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4095         }
4096 #endif
4097         /* if there are any orphan inodes, free them */
4098         err = f2fs_recover_orphan_inodes(sbi);
4099         if (err)
4100                 goto free_meta;
4101
4102         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4103                 goto reset_checkpoint;
4104
4105         /* recover fsynced data */
4106         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4107                         !test_opt(sbi, NORECOVERY)) {
4108                 /*
4109                  * mount should be failed, when device has readonly mode, and
4110                  * previous checkpoint was not done by clean system shutdown.
4111                  */
4112                 if (f2fs_hw_is_readonly(sbi)) {
4113                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4114                                 err = f2fs_recover_fsync_data(sbi, true);
4115                                 if (err > 0) {
4116                                         err = -EROFS;
4117                                         f2fs_err(sbi, "Need to recover fsync data, but "
4118                                                 "write access unavailable, please try "
4119                                                 "mount w/ disable_roll_forward or norecovery");
4120                                 }
4121                                 if (err < 0)
4122                                         goto free_meta;
4123                         }
4124                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4125                         goto reset_checkpoint;
4126                 }
4127
4128                 if (need_fsck)
4129                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4130
4131                 if (skip_recovery)
4132                         goto reset_checkpoint;
4133
4134                 err = f2fs_recover_fsync_data(sbi, false);
4135                 if (err < 0) {
4136                         if (err != -ENOMEM)
4137                                 skip_recovery = true;
4138                         need_fsck = true;
4139                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4140                                  err);
4141                         goto free_meta;
4142                 }
4143         } else {
4144                 err = f2fs_recover_fsync_data(sbi, true);
4145
4146                 if (!f2fs_readonly(sb) && err > 0) {
4147                         err = -EINVAL;
4148                         f2fs_err(sbi, "Need to recover fsync data");
4149                         goto free_meta;
4150                 }
4151         }
4152
4153         /*
4154          * If the f2fs is not readonly and fsync data recovery succeeds,
4155          * check zoned block devices' write pointer consistency.
4156          */
4157         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4158                 err = f2fs_check_write_pointer(sbi);
4159                 if (err)
4160                         goto free_meta;
4161         }
4162
4163 reset_checkpoint:
4164         f2fs_init_inmem_curseg(sbi);
4165
4166         /* f2fs_recover_fsync_data() cleared this already */
4167         clear_sbi_flag(sbi, SBI_POR_DOING);
4168
4169         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4170                 err = f2fs_disable_checkpoint(sbi);
4171                 if (err)
4172                         goto sync_free_meta;
4173         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4174                 f2fs_enable_checkpoint(sbi);
4175         }
4176
4177         /*
4178          * If filesystem is not mounted as read-only then
4179          * do start the gc_thread.
4180          */
4181         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4182                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4183                 /* After POR, we can run background GC thread.*/
4184                 err = f2fs_start_gc_thread(sbi);
4185                 if (err)
4186                         goto sync_free_meta;
4187         }
4188         kvfree(options);
4189
4190         /* recover broken superblock */
4191         if (recovery) {
4192                 err = f2fs_commit_super(sbi, true);
4193                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4194                           sbi->valid_super_block ? 1 : 2, err);
4195         }
4196
4197         f2fs_join_shrinker(sbi);
4198
4199         f2fs_tuning_parameters(sbi);
4200
4201         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4202                     cur_cp_version(F2FS_CKPT(sbi)));
4203         f2fs_update_time(sbi, CP_TIME);
4204         f2fs_update_time(sbi, REQ_TIME);
4205         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4206         return 0;
4207
4208 sync_free_meta:
4209         /* safe to flush all the data */
4210         sync_filesystem(sbi->sb);
4211         retry_cnt = 0;
4212
4213 free_meta:
4214 #ifdef CONFIG_QUOTA
4215         f2fs_truncate_quota_inode_pages(sb);
4216         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4217                 f2fs_quota_off_umount(sbi->sb);
4218 #endif
4219         /*
4220          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4221          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4222          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4223          * falls into an infinite loop in f2fs_sync_meta_pages().
4224          */
4225         truncate_inode_pages_final(META_MAPPING(sbi));
4226         /* evict some inodes being cached by GC */
4227         evict_inodes(sb);
4228         f2fs_unregister_sysfs(sbi);
4229 free_compress_inode:
4230         f2fs_destroy_compress_inode(sbi);
4231 free_root_inode:
4232         dput(sb->s_root);
4233         sb->s_root = NULL;
4234 free_node_inode:
4235         f2fs_release_ino_entry(sbi, true);
4236         truncate_inode_pages_final(NODE_MAPPING(sbi));
4237         iput(sbi->node_inode);
4238         sbi->node_inode = NULL;
4239 free_stats:
4240         f2fs_destroy_stats(sbi);
4241 free_nm:
4242         f2fs_destroy_node_manager(sbi);
4243 free_sm:
4244         f2fs_destroy_segment_manager(sbi);
4245         f2fs_destroy_post_read_wq(sbi);
4246 stop_ckpt_thread:
4247         f2fs_stop_ckpt_thread(sbi);
4248 free_devices:
4249         destroy_device_list(sbi);
4250         kvfree(sbi->ckpt);
4251 free_meta_inode:
4252         make_bad_inode(sbi->meta_inode);
4253         iput(sbi->meta_inode);
4254         sbi->meta_inode = NULL;
4255 free_page_array_cache:
4256         f2fs_destroy_page_array_cache(sbi);
4257 free_xattr_cache:
4258         f2fs_destroy_xattr_caches(sbi);
4259 free_io_dummy:
4260         mempool_destroy(sbi->write_io_dummy);
4261 free_percpu:
4262         destroy_percpu_info(sbi);
4263 free_bio_info:
4264         for (i = 0; i < NR_PAGE_TYPE; i++)
4265                 kvfree(sbi->write_io[i]);
4266
4267 #ifdef CONFIG_UNICODE
4268         utf8_unload(sb->s_encoding);
4269         sb->s_encoding = NULL;
4270 #endif
4271 free_options:
4272 #ifdef CONFIG_QUOTA
4273         for (i = 0; i < MAXQUOTAS; i++)
4274                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4275 #endif
4276         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4277         kvfree(options);
4278 free_sb_buf:
4279         kfree(raw_super);
4280 free_sbi:
4281         if (sbi->s_chksum_driver)
4282                 crypto_free_shash(sbi->s_chksum_driver);
4283         kfree(sbi);
4284
4285         /* give only one another chance */
4286         if (retry_cnt > 0 && skip_recovery) {
4287                 retry_cnt--;
4288                 shrink_dcache_sb(sb);
4289                 goto try_onemore;
4290         }
4291         return err;
4292 }
4293
4294 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4295                         const char *dev_name, void *data)
4296 {
4297         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4298 }
4299
4300 static void kill_f2fs_super(struct super_block *sb)
4301 {
4302         if (sb->s_root) {
4303                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4304
4305                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4306                 f2fs_stop_gc_thread(sbi);
4307                 f2fs_stop_discard_thread(sbi);
4308
4309 #ifdef CONFIG_F2FS_FS_COMPRESSION
4310                 /*
4311                  * latter evict_inode() can bypass checking and invalidating
4312                  * compress inode cache.
4313                  */
4314                 if (test_opt(sbi, COMPRESS_CACHE))
4315                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4316 #endif
4317
4318                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4319                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4320                         struct cp_control cpc = {
4321                                 .reason = CP_UMOUNT,
4322                         };
4323                         f2fs_write_checkpoint(sbi, &cpc);
4324                 }
4325
4326                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4327                         sb->s_flags &= ~SB_RDONLY;
4328         }
4329         kill_block_super(sb);
4330 }
4331
4332 static struct file_system_type f2fs_fs_type = {
4333         .owner          = THIS_MODULE,
4334         .name           = "f2fs",
4335         .mount          = f2fs_mount,
4336         .kill_sb        = kill_f2fs_super,
4337         .fs_flags       = FS_REQUIRES_DEV,
4338 };
4339 MODULE_ALIAS_FS("f2fs");
4340
4341 static int __init init_inodecache(void)
4342 {
4343         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4344                         sizeof(struct f2fs_inode_info), 0,
4345                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4346         if (!f2fs_inode_cachep)
4347                 return -ENOMEM;
4348         return 0;
4349 }
4350
4351 static void destroy_inodecache(void)
4352 {
4353         /*
4354          * Make sure all delayed rcu free inodes are flushed before we
4355          * destroy cache.
4356          */
4357         rcu_barrier();
4358         kmem_cache_destroy(f2fs_inode_cachep);
4359 }
4360
4361 static int __init init_f2fs_fs(void)
4362 {
4363         int err;
4364
4365         if (PAGE_SIZE != F2FS_BLKSIZE) {
4366                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4367                                 PAGE_SIZE, F2FS_BLKSIZE);
4368                 return -EINVAL;
4369         }
4370
4371         err = init_inodecache();
4372         if (err)
4373                 goto fail;
4374         err = f2fs_create_node_manager_caches();
4375         if (err)
4376                 goto free_inodecache;
4377         err = f2fs_create_segment_manager_caches();
4378         if (err)
4379                 goto free_node_manager_caches;
4380         err = f2fs_create_checkpoint_caches();
4381         if (err)
4382                 goto free_segment_manager_caches;
4383         err = f2fs_create_recovery_cache();
4384         if (err)
4385                 goto free_checkpoint_caches;
4386         err = f2fs_create_extent_cache();
4387         if (err)
4388                 goto free_recovery_cache;
4389         err = f2fs_create_garbage_collection_cache();
4390         if (err)
4391                 goto free_extent_cache;
4392         err = f2fs_init_sysfs();
4393         if (err)
4394                 goto free_garbage_collection_cache;
4395         err = register_shrinker(&f2fs_shrinker_info);
4396         if (err)
4397                 goto free_sysfs;
4398         err = register_filesystem(&f2fs_fs_type);
4399         if (err)
4400                 goto free_shrinker;
4401         f2fs_create_root_stats();
4402         err = f2fs_init_post_read_processing();
4403         if (err)
4404                 goto free_root_stats;
4405         err = f2fs_init_bio_entry_cache();
4406         if (err)
4407                 goto free_post_read;
4408         err = f2fs_init_bioset();
4409         if (err)
4410                 goto free_bio_enrty_cache;
4411         err = f2fs_init_compress_mempool();
4412         if (err)
4413                 goto free_bioset;
4414         err = f2fs_init_compress_cache();
4415         if (err)
4416                 goto free_compress_mempool;
4417         err = f2fs_create_casefold_cache();
4418         if (err)
4419                 goto free_compress_cache;
4420         return 0;
4421 free_compress_cache:
4422         f2fs_destroy_compress_cache();
4423 free_compress_mempool:
4424         f2fs_destroy_compress_mempool();
4425 free_bioset:
4426         f2fs_destroy_bioset();
4427 free_bio_enrty_cache:
4428         f2fs_destroy_bio_entry_cache();
4429 free_post_read:
4430         f2fs_destroy_post_read_processing();
4431 free_root_stats:
4432         f2fs_destroy_root_stats();
4433         unregister_filesystem(&f2fs_fs_type);
4434 free_shrinker:
4435         unregister_shrinker(&f2fs_shrinker_info);
4436 free_sysfs:
4437         f2fs_exit_sysfs();
4438 free_garbage_collection_cache:
4439         f2fs_destroy_garbage_collection_cache();
4440 free_extent_cache:
4441         f2fs_destroy_extent_cache();
4442 free_recovery_cache:
4443         f2fs_destroy_recovery_cache();
4444 free_checkpoint_caches:
4445         f2fs_destroy_checkpoint_caches();
4446 free_segment_manager_caches:
4447         f2fs_destroy_segment_manager_caches();
4448 free_node_manager_caches:
4449         f2fs_destroy_node_manager_caches();
4450 free_inodecache:
4451         destroy_inodecache();
4452 fail:
4453         return err;
4454 }
4455
4456 static void __exit exit_f2fs_fs(void)
4457 {
4458         f2fs_destroy_casefold_cache();
4459         f2fs_destroy_compress_cache();
4460         f2fs_destroy_compress_mempool();
4461         f2fs_destroy_bioset();
4462         f2fs_destroy_bio_entry_cache();
4463         f2fs_destroy_post_read_processing();
4464         f2fs_destroy_root_stats();
4465         unregister_filesystem(&f2fs_fs_type);
4466         unregister_shrinker(&f2fs_shrinker_info);
4467         f2fs_exit_sysfs();
4468         f2fs_destroy_garbage_collection_cache();
4469         f2fs_destroy_extent_cache();
4470         f2fs_destroy_recovery_cache();
4471         f2fs_destroy_checkpoint_caches();
4472         f2fs_destroy_segment_manager_caches();
4473         f2fs_destroy_node_manager_caches();
4474         destroy_inodecache();
4475 }
4476
4477 module_init(init_f2fs_fs)
4478 module_exit(exit_f2fs_fs)
4479
4480 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4481 MODULE_DESCRIPTION("Flash Friendly File System");
4482 MODULE_LICENSE("GPL");
4483 MODULE_SOFTDEP("pre: crc32");
4484