fs/f2fs/super.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/super.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/fs.h>
  11 #include <linux/fs_context.h>
  12 #include <linux/sched/mm.h>
  13 #include <linux/statfs.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/kthread.h>
  16 #include <linux/parser.h>
  17 #include <linux/mount.h>
  18 #include <linux/seq_file.h>
  19 #include <linux/proc_fs.h>
  20 #include <linux/random.h>
  21 #include <linux/exportfs.h>
  22 #include <linux/blkdev.h>
  23 #include <linux/quotaops.h>
  24 #include <linux/f2fs_fs.h>
  25 #include <linux/sysfs.h>
  26 #include <linux/quota.h>
  27 #include <linux/unicode.h>
  28 #include <linux/part_stat.h>
  29 #include <linux/zstd.h>
  30 #include <linux/lz4.h>
  31
  32 #include "f2fs.h"
  33 #include "node.h"
  34 #include "segment.h"
  35 #include "xattr.h"
  36 #include "gc.h"
  37 #include "iostat.h"
  38
  39 #define CREATE_TRACE_POINTS
  40 #include <trace/events/f2fs.h>
  41
  42 static struct kmem_cache *f2fs_inode_cachep;
  43
  44 #ifdef CONFIG_F2FS_FAULT_INJECTION
  45
  46 const char *f2fs_fault_name[FAULT_MAX] = {
  47         [FAULT_KMALLOC]         = "kmalloc",
  48         [FAULT_KVMALLOC]        = "kvmalloc",
  49         [FAULT_PAGE_ALLOC]      = "page alloc",
  50         [FAULT_PAGE_GET]        = "page get",
  51         [FAULT_ALLOC_NID]       = "alloc nid",
  52         [FAULT_ORPHAN]          = "orphan",
  53         [FAULT_BLOCK]           = "no more block",
  54         [FAULT_DIR_DEPTH]       = "too big dir depth",
  55         [FAULT_EVICT_INODE]     = "evict_inode fail",
  56         [FAULT_TRUNCATE]        = "truncate fail",
  57         [FAULT_READ_IO]         = "read IO error",
  58         [FAULT_CHECKPOINT]      = "checkpoint error",
  59         [FAULT_DISCARD]         = "discard error",
  60         [FAULT_WRITE_IO]        = "write IO error",
  61         [FAULT_SLAB_ALLOC]      = "slab alloc",
  62         [FAULT_DQUOT_INIT]      = "dquot initialize",
  63         [FAULT_LOCK_OP]         = "lock_op",
  64 };
  65
  66 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  67                                                         unsigned int type)
  68 {
  69         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  70
  71         if (rate) {
  72                 atomic_set(&ffi->inject_ops, 0);
  73                 ffi->inject_rate = rate;
  74         }
  75
  76         if (type)
  77                 ffi->inject_type = type;
  78
  79         if (!rate && !type)
  80                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  81 }
  82 #endif
  83
  84 /* f2fs-wide shrinker description */
  85 static struct shrinker f2fs_shrinker_info = {
  86         .scan_objects = f2fs_shrink_scan,
  87         .count_objects = f2fs_shrink_count,
  88         .seeks = DEFAULT_SEEKS,
  89 };
  90
  91 enum {
  92         Opt_gc_background,
  93         Opt_disable_roll_forward,
  94         Opt_norecovery,
  95         Opt_discard,
  96         Opt_nodiscard,
  97         Opt_noheap,
  98         Opt_heap,
  99         Opt_user_xattr,
 100         Opt_nouser_xattr,
 101         Opt_acl,
 102         Opt_noacl,
 103         Opt_active_logs,
 104         Opt_disable_ext_identify,
 105         Opt_inline_xattr,
 106         Opt_noinline_xattr,
 107         Opt_inline_xattr_size,
 108         Opt_inline_data,
 109         Opt_inline_dentry,
 110         Opt_noinline_dentry,
 111         Opt_flush_merge,
 112         Opt_noflush_merge,
 113         Opt_nobarrier,
 114         Opt_fastboot,
 115         Opt_extent_cache,
 116         Opt_noextent_cache,
 117         Opt_noinline_data,
 118         Opt_data_flush,
 119         Opt_reserve_root,
 120         Opt_resgid,
 121         Opt_resuid,
 122         Opt_mode,
 123         Opt_io_size_bits,
 124         Opt_fault_injection,
 125         Opt_fault_type,
 126         Opt_lazytime,
 127         Opt_nolazytime,
 128         Opt_quota,
 129         Opt_noquota,
 130         Opt_usrquota,
 131         Opt_grpquota,
 132         Opt_prjquota,
 133         Opt_usrjquota,
 134         Opt_grpjquota,
 135         Opt_prjjquota,
 136         Opt_offusrjquota,
 137         Opt_offgrpjquota,
 138         Opt_offprjjquota,
 139         Opt_jqfmt_vfsold,
 140         Opt_jqfmt_vfsv0,
 141         Opt_jqfmt_vfsv1,
 142         Opt_alloc,
 143         Opt_fsync,
 144         Opt_test_dummy_encryption,
 145         Opt_inlinecrypt,
 146         Opt_checkpoint_disable,
 147         Opt_checkpoint_disable_cap,
 148         Opt_checkpoint_disable_cap_perc,
 149         Opt_checkpoint_enable,
 150         Opt_checkpoint_merge,
 151         Opt_nocheckpoint_merge,
 152         Opt_compress_algorithm,
 153         Opt_compress_log_size,
 154         Opt_compress_extension,
 155         Opt_nocompress_extension,
 156         Opt_compress_chksum,
 157         Opt_compress_mode,
 158         Opt_compress_cache,
 159         Opt_atgc,
 160         Opt_gc_merge,
 161         Opt_nogc_merge,
 162         Opt_discard_unit,
 163         Opt_memory_mode,
 164         Opt_err,
 165 };
 166
 167 static match_table_t f2fs_tokens = {
 168         {Opt_gc_background, "background_gc=%s"},
 169         {Opt_disable_roll_forward, "disable_roll_forward"},
 170         {Opt_norecovery, "norecovery"},
 171         {Opt_discard, "discard"},
 172         {Opt_nodiscard, "nodiscard"},
 173         {Opt_noheap, "no_heap"},
 174         {Opt_heap, "heap"},
 175         {Opt_user_xattr, "user_xattr"},
 176         {Opt_nouser_xattr, "nouser_xattr"},
 177         {Opt_acl, "acl"},
 178         {Opt_noacl, "noacl"},
 179         {Opt_active_logs, "active_logs=%u"},
 180         {Opt_disable_ext_identify, "disable_ext_identify"},
 181         {Opt_inline_xattr, "inline_xattr"},
 182         {Opt_noinline_xattr, "noinline_xattr"},
 183         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 184         {Opt_inline_data, "inline_data"},
 185         {Opt_inline_dentry, "inline_dentry"},
 186         {Opt_noinline_dentry, "noinline_dentry"},
 187         {Opt_flush_merge, "flush_merge"},
 188         {Opt_noflush_merge, "noflush_merge"},
 189         {Opt_nobarrier, "nobarrier"},
 190         {Opt_fastboot, "fastboot"},
 191         {Opt_extent_cache, "extent_cache"},
 192         {Opt_noextent_cache, "noextent_cache"},
 193         {Opt_noinline_data, "noinline_data"},
 194         {Opt_data_flush, "data_flush"},
 195         {Opt_reserve_root, "reserve_root=%u"},
 196         {Opt_resgid, "resgid=%u"},
 197         {Opt_resuid, "resuid=%u"},
 198         {Opt_mode, "mode=%s"},
 199         {Opt_io_size_bits, "io_bits=%u"},
 200         {Opt_fault_injection, "fault_injection=%u"},
 201         {Opt_fault_type, "fault_type=%u"},
 202         {Opt_lazytime, "lazytime"},
 203         {Opt_nolazytime, "nolazytime"},
 204         {Opt_quota, "quota"},
 205         {Opt_noquota, "noquota"},
 206         {Opt_usrquota, "usrquota"},
 207         {Opt_grpquota, "grpquota"},
 208         {Opt_prjquota, "prjquota"},
 209         {Opt_usrjquota, "usrjquota=%s"},
 210         {Opt_grpjquota, "grpjquota=%s"},
 211         {Opt_prjjquota, "prjjquota=%s"},
 212         {Opt_offusrjquota, "usrjquota="},
 213         {Opt_offgrpjquota, "grpjquota="},
 214         {Opt_offprjjquota, "prjjquota="},
 215         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 216         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 217         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 218         {Opt_alloc, "alloc_mode=%s"},
 219         {Opt_fsync, "fsync_mode=%s"},
 220         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 221         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 222         {Opt_inlinecrypt, "inlinecrypt"},
 223         {Opt_checkpoint_disable, "checkpoint=disable"},
 224         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 225         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 226         {Opt_checkpoint_enable, "checkpoint=enable"},
 227         {Opt_checkpoint_merge, "checkpoint_merge"},
 228         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 229         {Opt_compress_algorithm, "compress_algorithm=%s"},
 230         {Opt_compress_log_size, "compress_log_size=%u"},
 231         {Opt_compress_extension, "compress_extension=%s"},
 232         {Opt_nocompress_extension, "nocompress_extension=%s"},
 233         {Opt_compress_chksum, "compress_chksum"},
 234         {Opt_compress_mode, "compress_mode=%s"},
 235         {Opt_compress_cache, "compress_cache"},
 236         {Opt_atgc, "atgc"},
 237         {Opt_gc_merge, "gc_merge"},
 238         {Opt_nogc_merge, "nogc_merge"},
 239         {Opt_discard_unit, "discard_unit=%s"},
 240         {Opt_memory_mode, "memory=%s"},
 241         {Opt_err, NULL},
 242 };
 243
 244 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 245 {
 246         struct va_format vaf;
 247         va_list args;
 248         int level;
 249
 250         va_start(args, fmt);
 251
 252         level = printk_get_level(fmt);
 253         vaf.fmt = printk_skip_level(fmt);
 254         vaf.va = &args;
 255         printk("%c%cF2FS-fs (%s): %pV\n",
 256                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 257
 258         va_end(args);
 259 }
 260
 261 #if IS_ENABLED(CONFIG_UNICODE)
 262 static const struct f2fs_sb_encodings {
 263         __u16 magic;
 264         char *name;
 265         unsigned int version;
 266 } f2fs_sb_encoding_map[] = {
 267         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 268 };
 269
 270 static const struct f2fs_sb_encodings *
 271 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 272 {
 273         __u16 magic = le16_to_cpu(sb->s_encoding);
 274         int i;
 275
 276         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 277                 if (magic == f2fs_sb_encoding_map[i].magic)
 278                         return &f2fs_sb_encoding_map[i];
 279
 280         return NULL;
 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 >> 3),
 305                         sbi->user_block_count - sbi->reserved_blocks);
 306
 307         /* limit is 12.5% */
 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 int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 327 {
 328         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 329         unsigned int avg_vblocks;
 330         unsigned int wanted_reserved_segments;
 331         block_t avail_user_block_count;
 332
 333         if (!F2FS_IO_ALIGNED(sbi))
 334                 return 0;
 335
 336         /* average valid block count in section in worst case */
 337         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 338
 339         /*
 340          * we need enough free space when migrating one section in worst case
 341          */
 342         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 343                                                 reserved_segments(sbi);
 344         wanted_reserved_segments -= reserved_segments(sbi);
 345
 346         avail_user_block_count = sbi->user_block_count -
 347                                 sbi->current_reserved_blocks -
 348                                 F2FS_OPTION(sbi).root_reserved_blocks;
 349
 350         if (wanted_reserved_segments * sbi->blocks_per_seg >
 351                                         avail_user_block_count) {
 352                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 353                         wanted_reserved_segments,
 354                         avail_user_block_count >> sbi->log_blocks_per_seg);
 355                 return -ENOSPC;
 356         }
 357
 358         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 359
 360         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 361                          wanted_reserved_segments);
 362
 363         return 0;
 364 }
 365
 366 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 367 {
 368         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 369                 return;
 370
 371         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 372                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 373         else
 374                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 375                                         F2FS_OPTION(sbi).unusable_cap_perc;
 376
 377         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 378                         F2FS_OPTION(sbi).unusable_cap,
 379                         F2FS_OPTION(sbi).unusable_cap_perc);
 380 }
 381
 382 static void init_once(void *foo)
 383 {
 384         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 385
 386         inode_init_once(&fi->vfs_inode);
 387 }
 388
 389 #ifdef CONFIG_QUOTA
 390 static const char * const quotatypes[] = INITQFNAMES;
 391 #define QTYPE2NAME(t) (quotatypes[t])
 392 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 393                                                         substring_t *args)
 394 {
 395         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 396         char *qname;
 397         int ret = -EINVAL;
 398
 399         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 400                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 401                 return -EINVAL;
 402         }
 403         if (f2fs_sb_has_quota_ino(sbi)) {
 404                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 405                 return 0;
 406         }
 407
 408         qname = match_strdup(args);
 409         if (!qname) {
 410                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 411                 return -ENOMEM;
 412         }
 413         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 414                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 415                         ret = 0;
 416                 else
 417                         f2fs_err(sbi, "%s quota file already specified",
 418                                  QTYPE2NAME(qtype));
 419                 goto errout;
 420         }
 421         if (strchr(qname, '/')) {
 422                 f2fs_err(sbi, "quotafile must be on filesystem root");
 423                 goto errout;
 424         }
 425         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 426         set_opt(sbi, QUOTA);
 427         return 0;
 428 errout:
 429         kfree(qname);
 430         return ret;
 431 }
 432
 433 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 434 {
 435         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 436
 437         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 438                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 439                 return -EINVAL;
 440         }
 441         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 442         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 443         return 0;
 444 }
 445
 446 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 447 {
 448         /*
 449          * We do the test below only for project quotas. 'usrquota' and
 450          * 'grpquota' mount options are allowed even without quota feature
 451          * to support legacy quotas in quota files.
 452          */
 453         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 454                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 455                 return -1;
 456         }
 457         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 458                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 459                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 460                 if (test_opt(sbi, USRQUOTA) &&
 461                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 462                         clear_opt(sbi, USRQUOTA);
 463
 464                 if (test_opt(sbi, GRPQUOTA) &&
 465                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 466                         clear_opt(sbi, GRPQUOTA);
 467
 468                 if (test_opt(sbi, PRJQUOTA) &&
 469                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 470                         clear_opt(sbi, PRJQUOTA);
 471
 472                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 473                                 test_opt(sbi, PRJQUOTA)) {
 474                         f2fs_err(sbi, "old and new quota format mixing");
 475                         return -1;
 476                 }
 477
 478                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 479                         f2fs_err(sbi, "journaled quota format not specified");
 480                         return -1;
 481                 }
 482         }
 483
 484         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 485                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 486                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 487         }
 488         return 0;
 489 }
 490 #endif
 491
 492 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 493                                           const char *opt,
 494                                           const substring_t *arg,
 495                                           bool is_remount)
 496 {
 497         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 498         struct fs_parameter param = {
 499                 .type = fs_value_is_string,
 500                 .string = arg->from ? arg->from : "",
 501         };
 502         struct fscrypt_dummy_policy *policy =
 503                 &F2FS_OPTION(sbi).dummy_enc_policy;
 504         int err;
 505
 506         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 507                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 508                 return -EINVAL;
 509         }
 510
 511         if (!f2fs_sb_has_encrypt(sbi)) {
 512                 f2fs_err(sbi, "Encrypt feature is off");
 513                 return -EINVAL;
 514         }
 515
 516         /*
 517          * This mount option is just for testing, and it's not worthwhile to
 518          * implement the extra complexity (e.g. RCU protection) that would be
 519          * needed to allow it to be set or changed during remount.  We do allow
 520          * it to be specified during remount, but only if there is no change.
 521          */
 522         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 523                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 524                 return -EINVAL;
 525         }
 526
 527         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 528         if (err) {
 529                 if (err == -EEXIST)
 530                         f2fs_warn(sbi,
 531                                   "Can't change test_dummy_encryption on remount");
 532                 else if (err == -EINVAL)
 533                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 534                                   opt);
 535                 else
 536                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 537                                   opt, err);
 538                 return -EINVAL;
 539         }
 540         err = fscrypt_add_test_dummy_key(sb, policy);
 541         if (err) {
 542                 f2fs_warn(sbi, "Error adding test dummy encryption key [%d]",
 543                           err);
 544                 return err;
 545         }
 546         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 547         return 0;
 548 }
 549
 550 #ifdef CONFIG_F2FS_FS_COMPRESSION
 551 /*
 552  * 1. The same extension name cannot not appear in both compress and non-compress extension
 553  * at the same time.
 554  * 2. If the compress extension specifies all files, the types specified by the non-compress
 555  * extension will be treated as special cases and will not be compressed.
 556  * 3. Don't allow the non-compress extension specifies all files.
 557  */
 558 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 559 {
 560         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 561         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 562         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 563
 564         ext = F2FS_OPTION(sbi).extensions;
 565         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 566         noext = F2FS_OPTION(sbi).noextensions;
 567         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 568
 569         if (!noext_cnt)
 570                 return 0;
 571
 572         for (no_index = 0; no_index < noext_cnt; no_index++) {
 573                 if (!strcasecmp("*", noext[no_index])) {
 574                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 575                         return -EINVAL;
 576                 }
 577                 for (index = 0; index < ext_cnt; index++) {
 578                         if (!strcasecmp(ext[index], noext[no_index])) {
 579                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 580                                                 ext[index]);
 581                                 return -EINVAL;
 582                         }
 583                 }
 584         }
 585         return 0;
 586 }
 587
 588 #ifdef CONFIG_F2FS_FS_LZ4
 589 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 590 {
 591 #ifdef CONFIG_F2FS_FS_LZ4HC
 592         unsigned int level;
 593 #endif
 594
 595         if (strlen(str) == 3) {
 596                 F2FS_OPTION(sbi).compress_level = 0;
 597                 return 0;
 598         }
 599
 600 #ifdef CONFIG_F2FS_FS_LZ4HC
 601         str += 3;
 602
 603         if (str[0] != ':') {
 604                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 605                 return -EINVAL;
 606         }
 607         if (kstrtouint(str + 1, 10, &level))
 608                 return -EINVAL;
 609
 610         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 611                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 612                 return -EINVAL;
 613         }
 614
 615         F2FS_OPTION(sbi).compress_level = level;
 616         return 0;
 617 #else
 618         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 619         return -EINVAL;
 620 #endif
 621 }
 622 #endif
 623
 624 #ifdef CONFIG_F2FS_FS_ZSTD
 625 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 626 {
 627         unsigned int level;
 628         int len = 4;
 629
 630         if (strlen(str) == len) {
 631                 F2FS_OPTION(sbi).compress_level = 0;
 632                 return 0;
 633         }
 634
 635         str += len;
 636
 637         if (str[0] != ':') {
 638                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 639                 return -EINVAL;
 640         }
 641         if (kstrtouint(str + 1, 10, &level))
 642                 return -EINVAL;
 643
 644         if (!level || level > zstd_max_clevel()) {
 645                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 646                 return -EINVAL;
 647         }
 648
 649         F2FS_OPTION(sbi).compress_level = level;
 650         return 0;
 651 }
 652 #endif
 653 #endif
 654
 655 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 656 {
 657         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 658         substring_t args[MAX_OPT_ARGS];
 659 #ifdef CONFIG_F2FS_FS_COMPRESSION
 660         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 661         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 662         int ext_cnt, noext_cnt;
 663 #endif
 664         char *p, *name;
 665         int arg = 0;
 666         kuid_t uid;
 667         kgid_t gid;
 668         int ret;
 669
 670         if (!options)
 671                 goto default_check;
 672
 673         while ((p = strsep(&options, ",")) != NULL) {
 674                 int token;
 675
 676                 if (!*p)
 677                         continue;
 678                 /*
 679                  * Initialize args struct so we know whether arg was
 680                  * found; some options take optional arguments.
 681                  */
 682                 args[0].to = args[0].from = NULL;
 683                 token = match_token(p, f2fs_tokens, args);
 684
 685                 switch (token) {
 686                 case Opt_gc_background:
 687                         name = match_strdup(&args[0]);
 688
 689                         if (!name)
 690                                 return -ENOMEM;
 691                         if (!strcmp(name, "on")) {
 692                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 693                         } else if (!strcmp(name, "off")) {
 694                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 695                         } else if (!strcmp(name, "sync")) {
 696                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 697                         } else {
 698                                 kfree(name);
 699                                 return -EINVAL;
 700                         }
 701                         kfree(name);
 702                         break;
 703                 case Opt_disable_roll_forward:
 704                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 705                         break;
 706                 case Opt_norecovery:
 707                         /* this option mounts f2fs with ro */
 708                         set_opt(sbi, NORECOVERY);
 709                         if (!f2fs_readonly(sb))
 710                                 return -EINVAL;
 711                         break;
 712                 case Opt_discard:
 713                         if (!f2fs_hw_support_discard(sbi)) {
 714                                 f2fs_warn(sbi, "device does not support discard");
 715                                 break;
 716                         }
 717                         set_opt(sbi, DISCARD);
 718                         break;
 719                 case Opt_nodiscard:
 720                         if (f2fs_hw_should_discard(sbi)) {
 721                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 722                                 return -EINVAL;
 723                         }
 724                         clear_opt(sbi, DISCARD);
 725                         break;
 726                 case Opt_noheap:
 727                         set_opt(sbi, NOHEAP);
 728                         break;
 729                 case Opt_heap:
 730                         clear_opt(sbi, NOHEAP);
 731                         break;
 732 #ifdef CONFIG_F2FS_FS_XATTR
 733                 case Opt_user_xattr:
 734                         set_opt(sbi, XATTR_USER);
 735                         break;
 736                 case Opt_nouser_xattr:
 737                         clear_opt(sbi, XATTR_USER);
 738                         break;
 739                 case Opt_inline_xattr:
 740                         set_opt(sbi, INLINE_XATTR);
 741                         break;
 742                 case Opt_noinline_xattr:
 743                         clear_opt(sbi, INLINE_XATTR);
 744                         break;
 745                 case Opt_inline_xattr_size:
 746                         if (args->from && match_int(args, &arg))
 747                                 return -EINVAL;
 748                         set_opt(sbi, INLINE_XATTR_SIZE);
 749                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 750                         break;
 751 #else
 752                 case Opt_user_xattr:
 753                         f2fs_info(sbi, "user_xattr options not supported");
 754                         break;
 755                 case Opt_nouser_xattr:
 756                         f2fs_info(sbi, "nouser_xattr options not supported");
 757                         break;
 758                 case Opt_inline_xattr:
 759                         f2fs_info(sbi, "inline_xattr options not supported");
 760                         break;
 761                 case Opt_noinline_xattr:
 762                         f2fs_info(sbi, "noinline_xattr options not supported");
 763                         break;
 764 #endif
 765 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 766                 case Opt_acl:
 767                         set_opt(sbi, POSIX_ACL);
 768                         break;
 769                 case Opt_noacl:
 770                         clear_opt(sbi, POSIX_ACL);
 771                         break;
 772 #else
 773                 case Opt_acl:
 774                         f2fs_info(sbi, "acl options not supported");
 775                         break;
 776                 case Opt_noacl:
 777                         f2fs_info(sbi, "noacl options not supported");
 778                         break;
 779 #endif
 780                 case Opt_active_logs:
 781                         if (args->from && match_int(args, &arg))
 782                                 return -EINVAL;
 783                         if (arg != 2 && arg != 4 &&
 784                                 arg != NR_CURSEG_PERSIST_TYPE)
 785                                 return -EINVAL;
 786                         F2FS_OPTION(sbi).active_logs = arg;
 787                         break;
 788                 case Opt_disable_ext_identify:
 789                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 790                         break;
 791                 case Opt_inline_data:
 792                         set_opt(sbi, INLINE_DATA);
 793                         break;
 794                 case Opt_inline_dentry:
 795                         set_opt(sbi, INLINE_DENTRY);
 796                         break;
 797                 case Opt_noinline_dentry:
 798                         clear_opt(sbi, INLINE_DENTRY);
 799                         break;
 800                 case Opt_flush_merge:
 801                         set_opt(sbi, FLUSH_MERGE);
 802                         break;
 803                 case Opt_noflush_merge:
 804                         clear_opt(sbi, FLUSH_MERGE);
 805                         break;
 806                 case Opt_nobarrier:
 807                         set_opt(sbi, NOBARRIER);
 808                         break;
 809                 case Opt_fastboot:
 810                         set_opt(sbi, FASTBOOT);
 811                         break;
 812                 case Opt_extent_cache:
 813                         set_opt(sbi, EXTENT_CACHE);
 814                         break;
 815                 case Opt_noextent_cache:
 816                         clear_opt(sbi, EXTENT_CACHE);
 817                         break;
 818                 case Opt_noinline_data:
 819                         clear_opt(sbi, INLINE_DATA);
 820                         break;
 821                 case Opt_data_flush:
 822                         set_opt(sbi, DATA_FLUSH);
 823                         break;
 824                 case Opt_reserve_root:
 825                         if (args->from && match_int(args, &arg))
 826                                 return -EINVAL;
 827                         if (test_opt(sbi, RESERVE_ROOT)) {
 828                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 829                                           F2FS_OPTION(sbi).root_reserved_blocks);
 830                         } else {
 831                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 832                                 set_opt(sbi, RESERVE_ROOT);
 833                         }
 834                         break;
 835                 case Opt_resuid:
 836                         if (args->from && match_int(args, &arg))
 837                                 return -EINVAL;
 838                         uid = make_kuid(current_user_ns(), arg);
 839                         if (!uid_valid(uid)) {
 840                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 841                                 return -EINVAL;
 842                         }
 843                         F2FS_OPTION(sbi).s_resuid = uid;
 844                         break;
 845                 case Opt_resgid:
 846                         if (args->from && match_int(args, &arg))
 847                                 return -EINVAL;
 848                         gid = make_kgid(current_user_ns(), arg);
 849                         if (!gid_valid(gid)) {
 850                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 851                                 return -EINVAL;
 852                         }
 853                         F2FS_OPTION(sbi).s_resgid = gid;
 854                         break;
 855                 case Opt_mode:
 856                         name = match_strdup(&args[0]);
 857
 858                         if (!name)
 859                                 return -ENOMEM;
 860                         if (!strcmp(name, "adaptive")) {
 861                                 if (f2fs_sb_has_blkzoned(sbi)) {
 862                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 863                                         kfree(name);
 864                                         return -EINVAL;
 865                                 }
 866                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 867                         } else if (!strcmp(name, "lfs")) {
 868                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 869                         } else if (!strcmp(name, "fragment:segment")) {
 870                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 871                         } else if (!strcmp(name, "fragment:block")) {
 872                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 873                         } else {
 874                                 kfree(name);
 875                                 return -EINVAL;
 876                         }
 877                         kfree(name);
 878                         break;
 879                 case Opt_io_size_bits:
 880                         if (args->from && match_int(args, &arg))
 881                                 return -EINVAL;
 882                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 883                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 884                                           1 << arg, BIO_MAX_VECS);
 885                                 return -EINVAL;
 886                         }
 887                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 888                         break;
 889 #ifdef CONFIG_F2FS_FAULT_INJECTION
 890                 case Opt_fault_injection:
 891                         if (args->from && match_int(args, &arg))
 892                                 return -EINVAL;
 893                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 894                         set_opt(sbi, FAULT_INJECTION);
 895                         break;
 896
 897                 case Opt_fault_type:
 898                         if (args->from && match_int(args, &arg))
 899                                 return -EINVAL;
 900                         f2fs_build_fault_attr(sbi, 0, arg);
 901                         set_opt(sbi, FAULT_INJECTION);
 902                         break;
 903 #else
 904                 case Opt_fault_injection:
 905                         f2fs_info(sbi, "fault_injection options not supported");
 906                         break;
 907
 908                 case Opt_fault_type:
 909                         f2fs_info(sbi, "fault_type options not supported");
 910                         break;
 911 #endif
 912                 case Opt_lazytime:
 913                         sb->s_flags |= SB_LAZYTIME;
 914                         break;
 915                 case Opt_nolazytime:
 916                         sb->s_flags &= ~SB_LAZYTIME;
 917                         break;
 918 #ifdef CONFIG_QUOTA
 919                 case Opt_quota:
 920                 case Opt_usrquota:
 921                         set_opt(sbi, USRQUOTA);
 922                         break;
 923                 case Opt_grpquota:
 924                         set_opt(sbi, GRPQUOTA);
 925                         break;
 926                 case Opt_prjquota:
 927                         set_opt(sbi, PRJQUOTA);
 928                         break;
 929                 case Opt_usrjquota:
 930                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 931                         if (ret)
 932                                 return ret;
 933                         break;
 934                 case Opt_grpjquota:
 935                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 936                         if (ret)
 937                                 return ret;
 938                         break;
 939                 case Opt_prjjquota:
 940                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 941                         if (ret)
 942                                 return ret;
 943                         break;
 944                 case Opt_offusrjquota:
 945                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 946                         if (ret)
 947                                 return ret;
 948                         break;
 949                 case Opt_offgrpjquota:
 950                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 951                         if (ret)
 952                                 return ret;
 953                         break;
 954                 case Opt_offprjjquota:
 955                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 956                         if (ret)
 957                                 return ret;
 958                         break;
 959                 case Opt_jqfmt_vfsold:
 960                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 961                         break;
 962                 case Opt_jqfmt_vfsv0:
 963                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 964                         break;
 965                 case Opt_jqfmt_vfsv1:
 966                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 967                         break;
 968                 case Opt_noquota:
 969                         clear_opt(sbi, QUOTA);
 970                         clear_opt(sbi, USRQUOTA);
 971                         clear_opt(sbi, GRPQUOTA);
 972                         clear_opt(sbi, PRJQUOTA);
 973                         break;
 974 #else
 975                 case Opt_quota:
 976                 case Opt_usrquota:
 977                 case Opt_grpquota:
 978                 case Opt_prjquota:
 979                 case Opt_usrjquota:
 980                 case Opt_grpjquota:
 981                 case Opt_prjjquota:
 982                 case Opt_offusrjquota:
 983                 case Opt_offgrpjquota:
 984                 case Opt_offprjjquota:
 985                 case Opt_jqfmt_vfsold:
 986                 case Opt_jqfmt_vfsv0:
 987                 case Opt_jqfmt_vfsv1:
 988                 case Opt_noquota:
 989                         f2fs_info(sbi, "quota operations not supported");
 990                         break;
 991 #endif
 992                 case Opt_alloc:
 993                         name = match_strdup(&args[0]);
 994                         if (!name)
 995                                 return -ENOMEM;
 996
 997                         if (!strcmp(name, "default")) {
 998                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 999                         } else if (!strcmp(name, "reuse")) {
1000                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1001                         } else {
1002                                 kfree(name);
1003                                 return -EINVAL;
1004                         }
1005                         kfree(name);
1006                         break;
1007                 case Opt_fsync:
1008                         name = match_strdup(&args[0]);
1009                         if (!name)
1010                                 return -ENOMEM;
1011                         if (!strcmp(name, "posix")) {
1012                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1013                         } else if (!strcmp(name, "strict")) {
1014                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1015                         } else if (!strcmp(name, "nobarrier")) {
1016                                 F2FS_OPTION(sbi).fsync_mode =
1017                                                         FSYNC_MODE_NOBARRIER;
1018                         } else {
1019                                 kfree(name);
1020                                 return -EINVAL;
1021                         }
1022                         kfree(name);
1023                         break;
1024                 case Opt_test_dummy_encryption:
1025                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1026                                                              is_remount);
1027                         if (ret)
1028                                 return ret;
1029                         break;
1030                 case Opt_inlinecrypt:
1031 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1032                         sb->s_flags |= SB_INLINECRYPT;
1033 #else
1034                         f2fs_info(sbi, "inline encryption not supported");
1035 #endif
1036                         break;
1037                 case Opt_checkpoint_disable_cap_perc:
1038                         if (args->from && match_int(args, &arg))
1039                                 return -EINVAL;
1040                         if (arg < 0 || arg > 100)
1041                                 return -EINVAL;
1042                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1043                         set_opt(sbi, DISABLE_CHECKPOINT);
1044                         break;
1045                 case Opt_checkpoint_disable_cap:
1046                         if (args->from && match_int(args, &arg))
1047                                 return -EINVAL;
1048                         F2FS_OPTION(sbi).unusable_cap = arg;
1049                         set_opt(sbi, DISABLE_CHECKPOINT);
1050                         break;
1051                 case Opt_checkpoint_disable:
1052                         set_opt(sbi, DISABLE_CHECKPOINT);
1053                         break;
1054                 case Opt_checkpoint_enable:
1055                         clear_opt(sbi, DISABLE_CHECKPOINT);
1056                         break;
1057                 case Opt_checkpoint_merge:
1058                         set_opt(sbi, MERGE_CHECKPOINT);
1059                         break;
1060                 case Opt_nocheckpoint_merge:
1061                         clear_opt(sbi, MERGE_CHECKPOINT);
1062                         break;
1063 #ifdef CONFIG_F2FS_FS_COMPRESSION
1064                 case Opt_compress_algorithm:
1065                         if (!f2fs_sb_has_compression(sbi)) {
1066                                 f2fs_info(sbi, "Image doesn't support compression");
1067                                 break;
1068                         }
1069                         name = match_strdup(&args[0]);
1070                         if (!name)
1071                                 return -ENOMEM;
1072                         if (!strcmp(name, "lzo")) {
1073 #ifdef CONFIG_F2FS_FS_LZO
1074                                 F2FS_OPTION(sbi).compress_level = 0;
1075                                 F2FS_OPTION(sbi).compress_algorithm =
1076                                                                 COMPRESS_LZO;
1077 #else
1078                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1079 #endif
1080                         } else if (!strncmp(name, "lz4", 3)) {
1081 #ifdef CONFIG_F2FS_FS_LZ4
1082                                 ret = f2fs_set_lz4hc_level(sbi, name);
1083                                 if (ret) {
1084                                         kfree(name);
1085                                         return -EINVAL;
1086                                 }
1087                                 F2FS_OPTION(sbi).compress_algorithm =
1088                                                                 COMPRESS_LZ4;
1089 #else
1090                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1091 #endif
1092                         } else if (!strncmp(name, "zstd", 4)) {
1093 #ifdef CONFIG_F2FS_FS_ZSTD
1094                                 ret = f2fs_set_zstd_level(sbi, name);
1095                                 if (ret) {
1096                                         kfree(name);
1097                                         return -EINVAL;
1098                                 }
1099                                 F2FS_OPTION(sbi).compress_algorithm =
1100                                                                 COMPRESS_ZSTD;
1101 #else
1102                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1103 #endif
1104                         } else if (!strcmp(name, "lzo-rle")) {
1105 #ifdef CONFIG_F2FS_FS_LZORLE
1106                                 F2FS_OPTION(sbi).compress_level = 0;
1107                                 F2FS_OPTION(sbi).compress_algorithm =
1108                                                                 COMPRESS_LZORLE;
1109 #else
1110                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1111 #endif
1112                         } else {
1113                                 kfree(name);
1114                                 return -EINVAL;
1115                         }
1116                         kfree(name);
1117                         break;
1118                 case Opt_compress_log_size:
1119                         if (!f2fs_sb_has_compression(sbi)) {
1120                                 f2fs_info(sbi, "Image doesn't support compression");
1121                                 break;
1122                         }
1123                         if (args->from && match_int(args, &arg))
1124                                 return -EINVAL;
1125                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1126                                 arg > MAX_COMPRESS_LOG_SIZE) {
1127                                 f2fs_err(sbi,
1128                                         "Compress cluster log size is out of range");
1129                                 return -EINVAL;
1130                         }
1131                         F2FS_OPTION(sbi).compress_log_size = arg;
1132                         break;
1133                 case Opt_compress_extension:
1134                         if (!f2fs_sb_has_compression(sbi)) {
1135                                 f2fs_info(sbi, "Image doesn't support compression");
1136                                 break;
1137                         }
1138                         name = match_strdup(&args[0]);
1139                         if (!name)
1140                                 return -ENOMEM;
1141
1142                         ext = F2FS_OPTION(sbi).extensions;
1143                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1144
1145                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1146                                 ext_cnt >= COMPRESS_EXT_NUM) {
1147                                 f2fs_err(sbi,
1148                                         "invalid extension length/number");
1149                                 kfree(name);
1150                                 return -EINVAL;
1151                         }
1152
1153                         strcpy(ext[ext_cnt], name);
1154                         F2FS_OPTION(sbi).compress_ext_cnt++;
1155                         kfree(name);
1156                         break;
1157                 case Opt_nocompress_extension:
1158                         if (!f2fs_sb_has_compression(sbi)) {
1159                                 f2fs_info(sbi, "Image doesn't support compression");
1160                                 break;
1161                         }
1162                         name = match_strdup(&args[0]);
1163                         if (!name)
1164                                 return -ENOMEM;
1165
1166                         noext = F2FS_OPTION(sbi).noextensions;
1167                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1168
1169                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1170                                 noext_cnt >= COMPRESS_EXT_NUM) {
1171                                 f2fs_err(sbi,
1172                                         "invalid extension length/number");
1173                                 kfree(name);
1174                                 return -EINVAL;
1175                         }
1176
1177                         strcpy(noext[noext_cnt], name);
1178                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1179                         kfree(name);
1180                         break;
1181                 case Opt_compress_chksum:
1182                         F2FS_OPTION(sbi).compress_chksum = true;
1183                         break;
1184                 case Opt_compress_mode:
1185                         name = match_strdup(&args[0]);
1186                         if (!name)
1187                                 return -ENOMEM;
1188                         if (!strcmp(name, "fs")) {
1189                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1190                         } else if (!strcmp(name, "user")) {
1191                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1192                         } else {
1193                                 kfree(name);
1194                                 return -EINVAL;
1195                         }
1196                         kfree(name);
1197                         break;
1198                 case Opt_compress_cache:
1199                         set_opt(sbi, COMPRESS_CACHE);
1200                         break;
1201 #else
1202                 case Opt_compress_algorithm:
1203                 case Opt_compress_log_size:
1204                 case Opt_compress_extension:
1205                 case Opt_nocompress_extension:
1206                 case Opt_compress_chksum:
1207                 case Opt_compress_mode:
1208                 case Opt_compress_cache:
1209                         f2fs_info(sbi, "compression options not supported");
1210                         break;
1211 #endif
1212                 case Opt_atgc:
1213                         set_opt(sbi, ATGC);
1214                         break;
1215                 case Opt_gc_merge:
1216                         set_opt(sbi, GC_MERGE);
1217                         break;
1218                 case Opt_nogc_merge:
1219                         clear_opt(sbi, GC_MERGE);
1220                         break;
1221                 case Opt_discard_unit:
1222                         name = match_strdup(&args[0]);
1223                         if (!name)
1224                                 return -ENOMEM;
1225                         if (!strcmp(name, "block")) {
1226                                 F2FS_OPTION(sbi).discard_unit =
1227                                                 DISCARD_UNIT_BLOCK;
1228                         } else if (!strcmp(name, "segment")) {
1229                                 F2FS_OPTION(sbi).discard_unit =
1230                                                 DISCARD_UNIT_SEGMENT;
1231                         } else if (!strcmp(name, "section")) {
1232                                 F2FS_OPTION(sbi).discard_unit =
1233                                                 DISCARD_UNIT_SECTION;
1234                         } else {
1235                                 kfree(name);
1236                                 return -EINVAL;
1237                         }
1238                         kfree(name);
1239                         break;
1240                 case Opt_memory_mode:
1241                         name = match_strdup(&args[0]);
1242                         if (!name)
1243                                 return -ENOMEM;
1244                         if (!strcmp(name, "normal")) {
1245                                 F2FS_OPTION(sbi).memory_mode =
1246                                                 MEMORY_MODE_NORMAL;
1247                         } else if (!strcmp(name, "low")) {
1248                                 F2FS_OPTION(sbi).memory_mode =
1249                                                 MEMORY_MODE_LOW;
1250                         } else {
1251                                 kfree(name);
1252                                 return -EINVAL;
1253                         }
1254                         kfree(name);
1255                         break;
1256                 default:
1257                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1258                                  p);
1259                         return -EINVAL;
1260                 }
1261         }
1262 default_check:
1263 #ifdef CONFIG_QUOTA
1264         if (f2fs_check_quota_options(sbi))
1265                 return -EINVAL;
1266 #else
1267         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1268                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1269                 return -EINVAL;
1270         }
1271         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1272                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1273                 return -EINVAL;
1274         }
1275 #endif
1276 #if !IS_ENABLED(CONFIG_UNICODE)
1277         if (f2fs_sb_has_casefold(sbi)) {
1278                 f2fs_err(sbi,
1279                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1280                 return -EINVAL;
1281         }
1282 #endif
1283         /*
1284          * The BLKZONED feature indicates that the drive was formatted with
1285          * zone alignment optimization. This is optional for host-aware
1286          * devices, but mandatory for host-managed zoned block devices.
1287          */
1288 #ifndef CONFIG_BLK_DEV_ZONED
1289         if (f2fs_sb_has_blkzoned(sbi)) {
1290                 f2fs_err(sbi, "Zoned block device support is not enabled");
1291                 return -EINVAL;
1292         }
1293 #endif
1294         if (f2fs_sb_has_blkzoned(sbi)) {
1295                 if (F2FS_OPTION(sbi).discard_unit !=
1296                                                 DISCARD_UNIT_SECTION) {
1297                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1298                         F2FS_OPTION(sbi).discard_unit =
1299                                         DISCARD_UNIT_SECTION;
1300                 }
1301         }
1302
1303 #ifdef CONFIG_F2FS_FS_COMPRESSION
1304         if (f2fs_test_compress_extension(sbi)) {
1305                 f2fs_err(sbi, "invalid compress or nocompress extension");
1306                 return -EINVAL;
1307         }
1308 #endif
1309
1310         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1311                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1312                          F2FS_IO_SIZE_KB(sbi));
1313                 return -EINVAL;
1314         }
1315
1316         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1317                 int min_size, max_size;
1318
1319                 if (!f2fs_sb_has_extra_attr(sbi) ||
1320                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1321                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1322                         return -EINVAL;
1323                 }
1324                 if (!test_opt(sbi, INLINE_XATTR)) {
1325                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1326                         return -EINVAL;
1327                 }
1328
1329                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1330                 max_size = MAX_INLINE_XATTR_SIZE;
1331
1332                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1333                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1334                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1335                                  min_size, max_size);
1336                         return -EINVAL;
1337                 }
1338         }
1339
1340         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1341                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1342                 return -EINVAL;
1343         }
1344
1345         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1346                 f2fs_err(sbi, "LFS not compatible with ATGC");
1347                 return -EINVAL;
1348         }
1349
1350         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1351                 f2fs_err(sbi, "Allow to mount readonly mode only");
1352                 return -EROFS;
1353         }
1354         return 0;
1355 }
1356
1357 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1358 {
1359         struct f2fs_inode_info *fi;
1360
1361         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC)) {
1362                 f2fs_show_injection_info(F2FS_SB(sb), FAULT_SLAB_ALLOC);
1363                 return NULL;
1364         }
1365
1366         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1367         if (!fi)
1368                 return NULL;
1369
1370         init_once((void *) fi);
1371
1372         /* Initialize f2fs-specific inode info */
1373         atomic_set(&fi->dirty_pages, 0);
1374         atomic_set(&fi->i_compr_blocks, 0);
1375         init_f2fs_rwsem(&fi->i_sem);
1376         spin_lock_init(&fi->i_size_lock);
1377         INIT_LIST_HEAD(&fi->dirty_list);
1378         INIT_LIST_HEAD(&fi->gdirty_list);
1379         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1380         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1381         init_f2fs_rwsem(&fi->i_xattr_sem);
1382
1383         /* Will be used by directory only */
1384         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1385
1386         return &fi->vfs_inode;
1387 }
1388
1389 static int f2fs_drop_inode(struct inode *inode)
1390 {
1391         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1392         int ret;
1393
1394         /*
1395          * during filesystem shutdown, if checkpoint is disabled,
1396          * drop useless meta/node dirty pages.
1397          */
1398         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1399                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1400                         inode->i_ino == F2FS_META_INO(sbi)) {
1401                         trace_f2fs_drop_inode(inode, 1);
1402                         return 1;
1403                 }
1404         }
1405
1406         /*
1407          * This is to avoid a deadlock condition like below.
1408          * writeback_single_inode(inode)
1409          *  - f2fs_write_data_page
1410          *    - f2fs_gc -> iput -> evict
1411          *       - inode_wait_for_writeback(inode)
1412          */
1413         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1414                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1415                         /* to avoid evict_inode call simultaneously */
1416                         atomic_inc(&inode->i_count);
1417                         spin_unlock(&inode->i_lock);
1418
1419                         /* should remain fi->extent_tree for writepage */
1420                         f2fs_destroy_extent_node(inode);
1421
1422                         sb_start_intwrite(inode->i_sb);
1423                         f2fs_i_size_write(inode, 0);
1424
1425                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1426                                         inode, NULL, 0, DATA);
1427                         truncate_inode_pages_final(inode->i_mapping);
1428
1429                         if (F2FS_HAS_BLOCKS(inode))
1430                                 f2fs_truncate(inode);
1431
1432                         sb_end_intwrite(inode->i_sb);
1433
1434                         spin_lock(&inode->i_lock);
1435                         atomic_dec(&inode->i_count);
1436                 }
1437                 trace_f2fs_drop_inode(inode, 0);
1438                 return 0;
1439         }
1440         ret = generic_drop_inode(inode);
1441         if (!ret)
1442                 ret = fscrypt_drop_inode(inode);
1443         trace_f2fs_drop_inode(inode, ret);
1444         return ret;
1445 }
1446
1447 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1448 {
1449         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1450         int ret = 0;
1451
1452         spin_lock(&sbi->inode_lock[DIRTY_META]);
1453         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1454                 ret = 1;
1455         } else {
1456                 set_inode_flag(inode, FI_DIRTY_INODE);
1457                 stat_inc_dirty_inode(sbi, DIRTY_META);
1458         }
1459         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1460                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1461                                 &sbi->inode_list[DIRTY_META]);
1462                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1463         }
1464         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1465         return ret;
1466 }
1467
1468 void f2fs_inode_synced(struct inode *inode)
1469 {
1470         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1471
1472         spin_lock(&sbi->inode_lock[DIRTY_META]);
1473         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1474                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1475                 return;
1476         }
1477         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1478                 list_del_init(&F2FS_I(inode)->gdirty_list);
1479                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1480         }
1481         clear_inode_flag(inode, FI_DIRTY_INODE);
1482         clear_inode_flag(inode, FI_AUTO_RECOVER);
1483         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1484         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1485 }
1486
1487 /*
1488  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1489  *
1490  * We should call set_dirty_inode to write the dirty inode through write_inode.
1491  */
1492 static void f2fs_dirty_inode(struct inode *inode, int flags)
1493 {
1494         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1495
1496         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1497                         inode->i_ino == F2FS_META_INO(sbi))
1498                 return;
1499
1500         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1501                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1502
1503         f2fs_inode_dirtied(inode, false);
1504 }
1505
1506 static void f2fs_free_inode(struct inode *inode)
1507 {
1508         fscrypt_free_inode(inode);
1509         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1510 }
1511
1512 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1513 {
1514         percpu_counter_destroy(&sbi->total_valid_inode_count);
1515         percpu_counter_destroy(&sbi->rf_node_block_count);
1516         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1517 }
1518
1519 static void destroy_device_list(struct f2fs_sb_info *sbi)
1520 {
1521         int i;
1522
1523         for (i = 0; i < sbi->s_ndevs; i++) {
1524                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1525 #ifdef CONFIG_BLK_DEV_ZONED
1526                 kvfree(FDEV(i).blkz_seq);
1527 #endif
1528         }
1529         kvfree(sbi->devs);
1530 }
1531
1532 static void f2fs_put_super(struct super_block *sb)
1533 {
1534         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1535         int i;
1536         bool dropped;
1537
1538         /* unregister procfs/sysfs entries in advance to avoid race case */
1539         f2fs_unregister_sysfs(sbi);
1540
1541         f2fs_quota_off_umount(sb);
1542
1543         /* prevent remaining shrinker jobs */
1544         mutex_lock(&sbi->umount_mutex);
1545
1546         /*
1547          * flush all issued checkpoints and stop checkpoint issue thread.
1548          * after then, all checkpoints should be done by each process context.
1549          */
1550         f2fs_stop_ckpt_thread(sbi);
1551
1552         /*
1553          * We don't need to do checkpoint when superblock is clean.
1554          * But, the previous checkpoint was not done by umount, it needs to do
1555          * clean checkpoint again.
1556          */
1557         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1558                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1559                 struct cp_control cpc = {
1560                         .reason = CP_UMOUNT,
1561                 };
1562                 f2fs_write_checkpoint(sbi, &cpc);
1563         }
1564
1565         /* be sure to wait for any on-going discard commands */
1566         dropped = f2fs_issue_discard_timeout(sbi);
1567
1568         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1569                                         !sbi->discard_blks && !dropped) {
1570                 struct cp_control cpc = {
1571                         .reason = CP_UMOUNT | CP_TRIMMED,
1572                 };
1573                 f2fs_write_checkpoint(sbi, &cpc);
1574         }
1575
1576         /*
1577          * normally superblock is clean, so we need to release this.
1578          * In addition, EIO will skip do checkpoint, we need this as well.
1579          */
1580         f2fs_release_ino_entry(sbi, true);
1581
1582         f2fs_leave_shrinker(sbi);
1583         mutex_unlock(&sbi->umount_mutex);
1584
1585         /* our cp_error case, we can wait for any writeback page */
1586         f2fs_flush_merged_writes(sbi);
1587
1588         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1589
1590         f2fs_bug_on(sbi, sbi->fsync_node_num);
1591
1592         f2fs_destroy_compress_inode(sbi);
1593
1594         iput(sbi->node_inode);
1595         sbi->node_inode = NULL;
1596
1597         iput(sbi->meta_inode);
1598         sbi->meta_inode = NULL;
1599
1600         /*
1601          * iput() can update stat information, if f2fs_write_checkpoint()
1602          * above failed with error.
1603          */
1604         f2fs_destroy_stats(sbi);
1605
1606         /* destroy f2fs internal modules */
1607         f2fs_destroy_node_manager(sbi);
1608         f2fs_destroy_segment_manager(sbi);
1609
1610         f2fs_destroy_post_read_wq(sbi);
1611
1612         kvfree(sbi->ckpt);
1613
1614         sb->s_fs_info = NULL;
1615         if (sbi->s_chksum_driver)
1616                 crypto_free_shash(sbi->s_chksum_driver);
1617         kfree(sbi->raw_super);
1618
1619         destroy_device_list(sbi);
1620         f2fs_destroy_page_array_cache(sbi);
1621         f2fs_destroy_xattr_caches(sbi);
1622         mempool_destroy(sbi->write_io_dummy);
1623 #ifdef CONFIG_QUOTA
1624         for (i = 0; i < MAXQUOTAS; i++)
1625                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1626 #endif
1627         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1628         destroy_percpu_info(sbi);
1629         f2fs_destroy_iostat(sbi);
1630         for (i = 0; i < NR_PAGE_TYPE; i++)
1631                 kvfree(sbi->write_io[i]);
1632 #if IS_ENABLED(CONFIG_UNICODE)
1633         utf8_unload(sb->s_encoding);
1634 #endif
1635         kfree(sbi);
1636 }
1637
1638 int f2fs_sync_fs(struct super_block *sb, int sync)
1639 {
1640         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1641         int err = 0;
1642
1643         if (unlikely(f2fs_cp_error(sbi)))
1644                 return 0;
1645         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1646                 return 0;
1647
1648         trace_f2fs_sync_fs(sb, sync);
1649
1650         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1651                 return -EAGAIN;
1652
1653         if (sync)
1654                 err = f2fs_issue_checkpoint(sbi);
1655
1656         return err;
1657 }
1658
1659 static int f2fs_freeze(struct super_block *sb)
1660 {
1661         if (f2fs_readonly(sb))
1662                 return 0;
1663
1664         /* IO error happened before */
1665         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1666                 return -EIO;
1667
1668         /* must be clean, since sync_filesystem() was already called */
1669         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1670                 return -EINVAL;
1671
1672         /* Let's flush checkpoints and stop the thread. */
1673         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1674
1675         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1676         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1677         return 0;
1678 }
1679
1680 static int f2fs_unfreeze(struct super_block *sb)
1681 {
1682         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1683         return 0;
1684 }
1685
1686 #ifdef CONFIG_QUOTA
1687 static int f2fs_statfs_project(struct super_block *sb,
1688                                 kprojid_t projid, struct kstatfs *buf)
1689 {
1690         struct kqid qid;
1691         struct dquot *dquot;
1692         u64 limit;
1693         u64 curblock;
1694
1695         qid = make_kqid_projid(projid);
1696         dquot = dqget(sb, qid);
1697         if (IS_ERR(dquot))
1698                 return PTR_ERR(dquot);
1699         spin_lock(&dquot->dq_dqb_lock);
1700
1701         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1702                                         dquot->dq_dqb.dqb_bhardlimit);
1703         if (limit)
1704                 limit >>= sb->s_blocksize_bits;
1705
1706         if (limit && buf->f_blocks > limit) {
1707                 curblock = (dquot->dq_dqb.dqb_curspace +
1708                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1709                 buf->f_blocks = limit;
1710                 buf->f_bfree = buf->f_bavail =
1711                         (buf->f_blocks > curblock) ?
1712                          (buf->f_blocks - curblock) : 0;
1713         }
1714
1715         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1716                                         dquot->dq_dqb.dqb_ihardlimit);
1717
1718         if (limit && buf->f_files > limit) {
1719                 buf->f_files = limit;
1720                 buf->f_ffree =
1721                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1722                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1723         }
1724
1725         spin_unlock(&dquot->dq_dqb_lock);
1726         dqput(dquot);
1727         return 0;
1728 }
1729 #endif
1730
1731 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1732 {
1733         struct super_block *sb = dentry->d_sb;
1734         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1735         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1736         block_t total_count, user_block_count, start_count;
1737         u64 avail_node_count;
1738         unsigned int total_valid_node_count;
1739
1740         total_count = le64_to_cpu(sbi->raw_super->block_count);
1741         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1742         buf->f_type = F2FS_SUPER_MAGIC;
1743         buf->f_bsize = sbi->blocksize;
1744
1745         buf->f_blocks = total_count - start_count;
1746
1747         spin_lock(&sbi->stat_lock);
1748
1749         user_block_count = sbi->user_block_count;
1750         total_valid_node_count = valid_node_count(sbi);
1751         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1752         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1753                                                 sbi->current_reserved_blocks;
1754
1755         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1756                 buf->f_bfree = 0;
1757         else
1758                 buf->f_bfree -= sbi->unusable_block_count;
1759         spin_unlock(&sbi->stat_lock);
1760
1761         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1762                 buf->f_bavail = buf->f_bfree -
1763                                 F2FS_OPTION(sbi).root_reserved_blocks;
1764         else
1765                 buf->f_bavail = 0;
1766
1767         if (avail_node_count > user_block_count) {
1768                 buf->f_files = user_block_count;
1769                 buf->f_ffree = buf->f_bavail;
1770         } else {
1771                 buf->f_files = avail_node_count;
1772                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1773                                         buf->f_bavail);
1774         }
1775
1776         buf->f_namelen = F2FS_NAME_LEN;
1777         buf->f_fsid    = u64_to_fsid(id);
1778
1779 #ifdef CONFIG_QUOTA
1780         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1781                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1782                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1783         }
1784 #endif
1785         return 0;
1786 }
1787
1788 static inline void f2fs_show_quota_options(struct seq_file *seq,
1789                                            struct super_block *sb)
1790 {
1791 #ifdef CONFIG_QUOTA
1792         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1793
1794         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1795                 char *fmtname = "";
1796
1797                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1798                 case QFMT_VFS_OLD:
1799                         fmtname = "vfsold";
1800                         break;
1801                 case QFMT_VFS_V0:
1802                         fmtname = "vfsv0";
1803                         break;
1804                 case QFMT_VFS_V1:
1805                         fmtname = "vfsv1";
1806                         break;
1807                 }
1808                 seq_printf(seq, ",jqfmt=%s", fmtname);
1809         }
1810
1811         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1812                 seq_show_option(seq, "usrjquota",
1813                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1814
1815         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1816                 seq_show_option(seq, "grpjquota",
1817                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1818
1819         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1820                 seq_show_option(seq, "prjjquota",
1821                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1822 #endif
1823 }
1824
1825 #ifdef CONFIG_F2FS_FS_COMPRESSION
1826 static inline void f2fs_show_compress_options(struct seq_file *seq,
1827                                                         struct super_block *sb)
1828 {
1829         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1830         char *algtype = "";
1831         int i;
1832
1833         if (!f2fs_sb_has_compression(sbi))
1834                 return;
1835
1836         switch (F2FS_OPTION(sbi).compress_algorithm) {
1837         case COMPRESS_LZO:
1838                 algtype = "lzo";
1839                 break;
1840         case COMPRESS_LZ4:
1841                 algtype = "lz4";
1842                 break;
1843         case COMPRESS_ZSTD:
1844                 algtype = "zstd";
1845                 break;
1846         case COMPRESS_LZORLE:
1847                 algtype = "lzo-rle";
1848                 break;
1849         }
1850         seq_printf(seq, ",compress_algorithm=%s", algtype);
1851
1852         if (F2FS_OPTION(sbi).compress_level)
1853                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1854
1855         seq_printf(seq, ",compress_log_size=%u",
1856                         F2FS_OPTION(sbi).compress_log_size);
1857
1858         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1859                 seq_printf(seq, ",compress_extension=%s",
1860                         F2FS_OPTION(sbi).extensions[i]);
1861         }
1862
1863         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1864                 seq_printf(seq, ",nocompress_extension=%s",
1865                         F2FS_OPTION(sbi).noextensions[i]);
1866         }
1867
1868         if (F2FS_OPTION(sbi).compress_chksum)
1869                 seq_puts(seq, ",compress_chksum");
1870
1871         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1872                 seq_printf(seq, ",compress_mode=%s", "fs");
1873         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1874                 seq_printf(seq, ",compress_mode=%s", "user");
1875
1876         if (test_opt(sbi, COMPRESS_CACHE))
1877                 seq_puts(seq, ",compress_cache");
1878 }
1879 #endif
1880
1881 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1882 {
1883         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1884
1885         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1886                 seq_printf(seq, ",background_gc=%s", "sync");
1887         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1888                 seq_printf(seq, ",background_gc=%s", "on");
1889         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1890                 seq_printf(seq, ",background_gc=%s", "off");
1891
1892         if (test_opt(sbi, GC_MERGE))
1893                 seq_puts(seq, ",gc_merge");
1894
1895         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1896                 seq_puts(seq, ",disable_roll_forward");
1897         if (test_opt(sbi, NORECOVERY))
1898                 seq_puts(seq, ",norecovery");
1899         if (test_opt(sbi, DISCARD))
1900                 seq_puts(seq, ",discard");
1901         else
1902                 seq_puts(seq, ",nodiscard");
1903         if (test_opt(sbi, NOHEAP))
1904                 seq_puts(seq, ",no_heap");
1905         else
1906                 seq_puts(seq, ",heap");
1907 #ifdef CONFIG_F2FS_FS_XATTR
1908         if (test_opt(sbi, XATTR_USER))
1909                 seq_puts(seq, ",user_xattr");
1910         else
1911                 seq_puts(seq, ",nouser_xattr");
1912         if (test_opt(sbi, INLINE_XATTR))
1913                 seq_puts(seq, ",inline_xattr");
1914         else
1915                 seq_puts(seq, ",noinline_xattr");
1916         if (test_opt(sbi, INLINE_XATTR_SIZE))
1917                 seq_printf(seq, ",inline_xattr_size=%u",
1918                                         F2FS_OPTION(sbi).inline_xattr_size);
1919 #endif
1920 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1921         if (test_opt(sbi, POSIX_ACL))
1922                 seq_puts(seq, ",acl");
1923         else
1924                 seq_puts(seq, ",noacl");
1925 #endif
1926         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1927                 seq_puts(seq, ",disable_ext_identify");
1928         if (test_opt(sbi, INLINE_DATA))
1929                 seq_puts(seq, ",inline_data");
1930         else
1931                 seq_puts(seq, ",noinline_data");
1932         if (test_opt(sbi, INLINE_DENTRY))
1933                 seq_puts(seq, ",inline_dentry");
1934         else
1935                 seq_puts(seq, ",noinline_dentry");
1936         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1937                 seq_puts(seq, ",flush_merge");
1938         if (test_opt(sbi, NOBARRIER))
1939                 seq_puts(seq, ",nobarrier");
1940         if (test_opt(sbi, FASTBOOT))
1941                 seq_puts(seq, ",fastboot");
1942         if (test_opt(sbi, EXTENT_CACHE))
1943                 seq_puts(seq, ",extent_cache");
1944         else
1945                 seq_puts(seq, ",noextent_cache");
1946         if (test_opt(sbi, DATA_FLUSH))
1947                 seq_puts(seq, ",data_flush");
1948
1949         seq_puts(seq, ",mode=");
1950         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1951                 seq_puts(seq, "adaptive");
1952         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1953                 seq_puts(seq, "lfs");
1954         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
1955                 seq_puts(seq, "fragment:segment");
1956         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
1957                 seq_puts(seq, "fragment:block");
1958         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1959         if (test_opt(sbi, RESERVE_ROOT))
1960                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1961                                 F2FS_OPTION(sbi).root_reserved_blocks,
1962                                 from_kuid_munged(&init_user_ns,
1963                                         F2FS_OPTION(sbi).s_resuid),
1964                                 from_kgid_munged(&init_user_ns,
1965                                         F2FS_OPTION(sbi).s_resgid));
1966         if (F2FS_IO_SIZE_BITS(sbi))
1967                 seq_printf(seq, ",io_bits=%u",
1968                                 F2FS_OPTION(sbi).write_io_size_bits);
1969 #ifdef CONFIG_F2FS_FAULT_INJECTION
1970         if (test_opt(sbi, FAULT_INJECTION)) {
1971                 seq_printf(seq, ",fault_injection=%u",
1972                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1973                 seq_printf(seq, ",fault_type=%u",
1974                                 F2FS_OPTION(sbi).fault_info.inject_type);
1975         }
1976 #endif
1977 #ifdef CONFIG_QUOTA
1978         if (test_opt(sbi, QUOTA))
1979                 seq_puts(seq, ",quota");
1980         if (test_opt(sbi, USRQUOTA))
1981                 seq_puts(seq, ",usrquota");
1982         if (test_opt(sbi, GRPQUOTA))
1983                 seq_puts(seq, ",grpquota");
1984         if (test_opt(sbi, PRJQUOTA))
1985                 seq_puts(seq, ",prjquota");
1986 #endif
1987         f2fs_show_quota_options(seq, sbi->sb);
1988
1989         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1990
1991         if (sbi->sb->s_flags & SB_INLINECRYPT)
1992                 seq_puts(seq, ",inlinecrypt");
1993
1994         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1995                 seq_printf(seq, ",alloc_mode=%s", "default");
1996         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1997                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1998
1999         if (test_opt(sbi, DISABLE_CHECKPOINT))
2000                 seq_printf(seq, ",checkpoint=disable:%u",
2001                                 F2FS_OPTION(sbi).unusable_cap);
2002         if (test_opt(sbi, MERGE_CHECKPOINT))
2003                 seq_puts(seq, ",checkpoint_merge");
2004         else
2005                 seq_puts(seq, ",nocheckpoint_merge");
2006         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2007                 seq_printf(seq, ",fsync_mode=%s", "posix");
2008         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2009                 seq_printf(seq, ",fsync_mode=%s", "strict");
2010         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2011                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2012
2013 #ifdef CONFIG_F2FS_FS_COMPRESSION
2014         f2fs_show_compress_options(seq, sbi->sb);
2015 #endif
2016
2017         if (test_opt(sbi, ATGC))
2018                 seq_puts(seq, ",atgc");
2019
2020         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2021                 seq_printf(seq, ",discard_unit=%s", "block");
2022         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2023                 seq_printf(seq, ",discard_unit=%s", "segment");
2024         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2025                 seq_printf(seq, ",discard_unit=%s", "section");
2026
2027         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2028                 seq_printf(seq, ",memory=%s", "normal");
2029         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2030                 seq_printf(seq, ",memory=%s", "low");
2031
2032         return 0;
2033 }
2034
2035 static void default_options(struct f2fs_sb_info *sbi)
2036 {
2037         /* init some FS parameters */
2038         if (f2fs_sb_has_readonly(sbi))
2039                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2040         else
2041                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2042
2043         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2044         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2045         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2046         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2047         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2048         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2049         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2050         F2FS_OPTION(sbi).compress_ext_cnt = 0;
2051         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2052         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2053         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2054
2055         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2056
2057         set_opt(sbi, INLINE_XATTR);
2058         set_opt(sbi, INLINE_DATA);
2059         set_opt(sbi, INLINE_DENTRY);
2060         set_opt(sbi, EXTENT_CACHE);
2061         set_opt(sbi, NOHEAP);
2062         clear_opt(sbi, DISABLE_CHECKPOINT);
2063         set_opt(sbi, MERGE_CHECKPOINT);
2064         F2FS_OPTION(sbi).unusable_cap = 0;
2065         sbi->sb->s_flags |= SB_LAZYTIME;
2066         set_opt(sbi, FLUSH_MERGE);
2067         if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2068                 set_opt(sbi, DISCARD);
2069         if (f2fs_sb_has_blkzoned(sbi)) {
2070                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2071                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2072         } else {
2073                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2074                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2075         }
2076
2077 #ifdef CONFIG_F2FS_FS_XATTR
2078         set_opt(sbi, XATTR_USER);
2079 #endif
2080 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2081         set_opt(sbi, POSIX_ACL);
2082 #endif
2083
2084         f2fs_build_fault_attr(sbi, 0, 0);
2085 }
2086
2087 #ifdef CONFIG_QUOTA
2088 static int f2fs_enable_quotas(struct super_block *sb);
2089 #endif
2090
2091 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2092 {
2093         unsigned int s_flags = sbi->sb->s_flags;
2094         struct cp_control cpc;
2095         unsigned int gc_mode = sbi->gc_mode;
2096         int err = 0;
2097         int ret;
2098         block_t unusable;
2099
2100         if (s_flags & SB_RDONLY) {
2101                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2102                 return -EINVAL;
2103         }
2104         sbi->sb->s_flags |= SB_ACTIVE;
2105
2106         /* check if we need more GC first */
2107         unusable = f2fs_get_unusable_blocks(sbi);
2108         if (!f2fs_disable_cp_again(sbi, unusable))
2109                 goto skip_gc;
2110
2111         f2fs_update_time(sbi, DISABLE_TIME);
2112
2113         sbi->gc_mode = GC_URGENT_HIGH;
2114
2115         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2116                 struct f2fs_gc_control gc_control = {
2117                         .victim_segno = NULL_SEGNO,
2118                         .init_gc_type = FG_GC,
2119                         .should_migrate_blocks = false,
2120                         .err_gc_skipped = true,
2121                         .nr_free_secs = 1 };
2122
2123                 f2fs_down_write(&sbi->gc_lock);
2124                 err = f2fs_gc(sbi, &gc_control);
2125                 if (err == -ENODATA) {
2126                         err = 0;
2127                         break;
2128                 }
2129                 if (err && err != -EAGAIN)
2130                         break;
2131         }
2132
2133         ret = sync_filesystem(sbi->sb);
2134         if (ret || err) {
2135                 err = ret ? ret : err;
2136                 goto restore_flag;
2137         }
2138
2139         unusable = f2fs_get_unusable_blocks(sbi);
2140         if (f2fs_disable_cp_again(sbi, unusable)) {
2141                 err = -EAGAIN;
2142                 goto restore_flag;
2143         }
2144
2145 skip_gc:
2146         f2fs_down_write(&sbi->gc_lock);
2147         cpc.reason = CP_PAUSE;
2148         set_sbi_flag(sbi, SBI_CP_DISABLED);
2149         err = f2fs_write_checkpoint(sbi, &cpc);
2150         if (err)
2151                 goto out_unlock;
2152
2153         spin_lock(&sbi->stat_lock);
2154         sbi->unusable_block_count = unusable;
2155         spin_unlock(&sbi->stat_lock);
2156
2157 out_unlock:
2158         f2fs_up_write(&sbi->gc_lock);
2159 restore_flag:
2160         sbi->gc_mode = gc_mode;
2161         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2162         return err;
2163 }
2164
2165 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2166 {
2167         int retry = DEFAULT_RETRY_IO_COUNT;
2168
2169         /* we should flush all the data to keep data consistency */
2170         do {
2171                 sync_inodes_sb(sbi->sb);
2172                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2173         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2174
2175         if (unlikely(retry < 0))
2176                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2177
2178         f2fs_down_write(&sbi->gc_lock);
2179         f2fs_dirty_to_prefree(sbi);
2180
2181         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2182         set_sbi_flag(sbi, SBI_IS_DIRTY);
2183         f2fs_up_write(&sbi->gc_lock);
2184
2185         f2fs_sync_fs(sbi->sb, 1);
2186
2187         /* Let's ensure there's no pending checkpoint anymore */
2188         f2fs_flush_ckpt_thread(sbi);
2189 }
2190
2191 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2192 {
2193         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2194         struct f2fs_mount_info org_mount_opt;
2195         unsigned long old_sb_flags;
2196         int err;
2197         bool need_restart_gc = false, need_stop_gc = false;
2198         bool need_restart_ckpt = false, need_stop_ckpt = false;
2199         bool need_restart_flush = false, need_stop_flush = false;
2200         bool need_restart_discard = false, need_stop_discard = false;
2201         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2202         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2203         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2204         bool no_atgc = !test_opt(sbi, ATGC);
2205         bool no_discard = !test_opt(sbi, DISCARD);
2206         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2207         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2208         struct discard_cmd_control *dcc;
2209 #ifdef CONFIG_QUOTA
2210         int i, j;
2211 #endif
2212
2213         /*
2214          * Save the old mount options in case we
2215          * need to restore them.
2216          */
2217         org_mount_opt = sbi->mount_opt;
2218         old_sb_flags = sb->s_flags;
2219
2220 #ifdef CONFIG_QUOTA
2221         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2222         for (i = 0; i < MAXQUOTAS; i++) {
2223                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2224                         org_mount_opt.s_qf_names[i] =
2225                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2226                                 GFP_KERNEL);
2227                         if (!org_mount_opt.s_qf_names[i]) {
2228                                 for (j = 0; j < i; j++)
2229                                         kfree(org_mount_opt.s_qf_names[j]);
2230                                 return -ENOMEM;
2231                         }
2232                 } else {
2233                         org_mount_opt.s_qf_names[i] = NULL;
2234                 }
2235         }
2236 #endif
2237
2238         /* recover superblocks we couldn't write due to previous RO mount */
2239         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2240                 err = f2fs_commit_super(sbi, false);
2241                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2242                           err);
2243                 if (!err)
2244                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2245         }
2246
2247         default_options(sbi);
2248
2249         /* parse mount options */
2250         err = parse_options(sb, data, true);
2251         if (err)
2252                 goto restore_opts;
2253
2254         /*
2255          * Previous and new state of filesystem is RO,
2256          * so skip checking GC and FLUSH_MERGE conditions.
2257          */
2258         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2259                 goto skip;
2260
2261         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2262                 err = -EROFS;
2263                 goto restore_opts;
2264         }
2265
2266 #ifdef CONFIG_QUOTA
2267         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2268                 err = dquot_suspend(sb, -1);
2269                 if (err < 0)
2270                         goto restore_opts;
2271         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2272                 /* dquot_resume needs RW */
2273                 sb->s_flags &= ~SB_RDONLY;
2274                 if (sb_any_quota_suspended(sb)) {
2275                         dquot_resume(sb, -1);
2276                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2277                         err = f2fs_enable_quotas(sb);
2278                         if (err)
2279                                 goto restore_opts;
2280                 }
2281         }
2282 #endif
2283         /* disallow enable atgc dynamically */
2284         if (no_atgc == !!test_opt(sbi, ATGC)) {
2285                 err = -EINVAL;
2286                 f2fs_warn(sbi, "switch atgc option is not allowed");
2287                 goto restore_opts;
2288         }
2289
2290         /* disallow enable/disable extent_cache dynamically */
2291         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2292                 err = -EINVAL;
2293                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2294                 goto restore_opts;
2295         }
2296
2297         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2298                 err = -EINVAL;
2299                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2300                 goto restore_opts;
2301         }
2302
2303         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2304                 err = -EINVAL;
2305                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2306                 goto restore_opts;
2307         }
2308
2309         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2310                 err = -EINVAL;
2311                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2312                 goto restore_opts;
2313         }
2314
2315         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2316                 err = -EINVAL;
2317                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2318                 goto restore_opts;
2319         }
2320
2321         /*
2322          * We stop the GC thread if FS is mounted as RO
2323          * or if background_gc = off is passed in mount
2324          * option. Also sync the filesystem.
2325          */
2326         if ((*flags & SB_RDONLY) ||
2327                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2328                         !test_opt(sbi, GC_MERGE))) {
2329                 if (sbi->gc_thread) {
2330                         f2fs_stop_gc_thread(sbi);
2331                         need_restart_gc = true;
2332                 }
2333         } else if (!sbi->gc_thread) {
2334                 err = f2fs_start_gc_thread(sbi);
2335                 if (err)
2336                         goto restore_opts;
2337                 need_stop_gc = true;
2338         }
2339
2340         if (*flags & SB_RDONLY) {
2341                 sync_inodes_sb(sb);
2342
2343                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2344                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2345                 f2fs_sync_fs(sb, 1);
2346                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2347         }
2348
2349         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2350                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2351                 f2fs_stop_ckpt_thread(sbi);
2352                 need_restart_ckpt = true;
2353         } else {
2354                 /* Flush if the prevous checkpoint, if exists. */
2355                 f2fs_flush_ckpt_thread(sbi);
2356
2357                 err = f2fs_start_ckpt_thread(sbi);
2358                 if (err) {
2359                         f2fs_err(sbi,
2360                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2361                             err);
2362                         goto restore_gc;
2363                 }
2364                 need_stop_ckpt = true;
2365         }
2366
2367         /*
2368          * We stop issue flush thread if FS is mounted as RO
2369          * or if flush_merge is not passed in mount option.
2370          */
2371         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2372                 clear_opt(sbi, FLUSH_MERGE);
2373                 f2fs_destroy_flush_cmd_control(sbi, false);
2374                 need_restart_flush = true;
2375         } else {
2376                 err = f2fs_create_flush_cmd_control(sbi);
2377                 if (err)
2378                         goto restore_ckpt;
2379                 need_stop_flush = true;
2380         }
2381
2382         if (no_discard == !!test_opt(sbi, DISCARD)) {
2383                 if (test_opt(sbi, DISCARD)) {
2384                         err = f2fs_start_discard_thread(sbi);
2385                         if (err)
2386                                 goto restore_flush;
2387                         need_stop_discard = true;
2388                 } else {
2389                         dcc = SM_I(sbi)->dcc_info;
2390                         f2fs_stop_discard_thread(sbi);
2391                         if (atomic_read(&dcc->discard_cmd_cnt))
2392                                 f2fs_issue_discard_timeout(sbi);
2393                         need_restart_discard = true;
2394                 }
2395         }
2396
2397         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2398                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2399                         err = f2fs_disable_checkpoint(sbi);
2400                         if (err)
2401                                 goto restore_discard;
2402                 } else {
2403                         f2fs_enable_checkpoint(sbi);
2404                 }
2405         }
2406
2407 skip:
2408 #ifdef CONFIG_QUOTA
2409         /* Release old quota file names */
2410         for (i = 0; i < MAXQUOTAS; i++)
2411                 kfree(org_mount_opt.s_qf_names[i]);
2412 #endif
2413         /* Update the POSIXACL Flag */
2414         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2415                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2416
2417         limit_reserve_root(sbi);
2418         adjust_unusable_cap_perc(sbi);
2419         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2420         return 0;
2421 restore_discard:
2422         if (need_restart_discard) {
2423                 if (f2fs_start_discard_thread(sbi))
2424                         f2fs_warn(sbi, "discard has been stopped");
2425         } else if (need_stop_discard) {
2426                 f2fs_stop_discard_thread(sbi);
2427         }
2428 restore_flush:
2429         if (need_restart_flush) {
2430                 if (f2fs_create_flush_cmd_control(sbi))
2431                         f2fs_warn(sbi, "background flush thread has stopped");
2432         } else if (need_stop_flush) {
2433                 clear_opt(sbi, FLUSH_MERGE);
2434                 f2fs_destroy_flush_cmd_control(sbi, false);
2435         }
2436 restore_ckpt:
2437         if (need_restart_ckpt) {
2438                 if (f2fs_start_ckpt_thread(sbi))
2439                         f2fs_warn(sbi, "background ckpt thread has stopped");
2440         } else if (need_stop_ckpt) {
2441                 f2fs_stop_ckpt_thread(sbi);
2442         }
2443 restore_gc:
2444         if (need_restart_gc) {
2445                 if (f2fs_start_gc_thread(sbi))
2446                         f2fs_warn(sbi, "background gc thread has stopped");
2447         } else if (need_stop_gc) {
2448                 f2fs_stop_gc_thread(sbi);
2449         }
2450 restore_opts:
2451 #ifdef CONFIG_QUOTA
2452         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2453         for (i = 0; i < MAXQUOTAS; i++) {
2454                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2455                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2456         }
2457 #endif
2458         sbi->mount_opt = org_mount_opt;
2459         sb->s_flags = old_sb_flags;
2460         return err;
2461 }
2462
2463 #ifdef CONFIG_QUOTA
2464 /* Read data from quotafile */
2465 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2466                                size_t len, loff_t off)
2467 {
2468         struct inode *inode = sb_dqopt(sb)->files[type];
2469         struct address_space *mapping = inode->i_mapping;
2470         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2471         int offset = off & (sb->s_blocksize - 1);
2472         int tocopy;
2473         size_t toread;
2474         loff_t i_size = i_size_read(inode);
2475         struct page *page;
2476
2477         if (off > i_size)
2478                 return 0;
2479
2480         if (off + len > i_size)
2481                 len = i_size - off;
2482         toread = len;
2483         while (toread > 0) {
2484                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2485 repeat:
2486                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2487                 if (IS_ERR(page)) {
2488                         if (PTR_ERR(page) == -ENOMEM) {
2489                                 memalloc_retry_wait(GFP_NOFS);
2490                                 goto repeat;
2491                         }
2492                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2493                         return PTR_ERR(page);
2494                 }
2495
2496                 lock_page(page);
2497
2498                 if (unlikely(page->mapping != mapping)) {
2499                         f2fs_put_page(page, 1);
2500                         goto repeat;
2501                 }
2502                 if (unlikely(!PageUptodate(page))) {
2503                         f2fs_put_page(page, 1);
2504                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2505                         return -EIO;
2506                 }
2507
2508                 memcpy_from_page(data, page, offset, tocopy);
2509                 f2fs_put_page(page, 1);
2510
2511                 offset = 0;
2512                 toread -= tocopy;
2513                 data += tocopy;
2514                 blkidx++;
2515         }
2516         return len;
2517 }
2518
2519 /* Write to quotafile */
2520 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2521                                 const char *data, size_t len, loff_t off)
2522 {
2523         struct inode *inode = sb_dqopt(sb)->files[type];
2524         struct address_space *mapping = inode->i_mapping;
2525         const struct address_space_operations *a_ops = mapping->a_ops;
2526         int offset = off & (sb->s_blocksize - 1);
2527         size_t towrite = len;
2528         struct page *page;
2529         void *fsdata = NULL;
2530         int err = 0;
2531         int tocopy;
2532
2533         while (towrite > 0) {
2534                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2535                                                                 towrite);
2536 retry:
2537                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2538                                                         &page, &fsdata);
2539                 if (unlikely(err)) {
2540                         if (err == -ENOMEM) {
2541                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2542                                 goto retry;
2543                         }
2544                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2545                         break;
2546                 }
2547
2548                 memcpy_to_page(page, offset, data, tocopy);
2549
2550                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2551                                                 page, fsdata);
2552                 offset = 0;
2553                 towrite -= tocopy;
2554                 off += tocopy;
2555                 data += tocopy;
2556                 cond_resched();
2557         }
2558
2559         if (len == towrite)
2560                 return err;
2561         inode->i_mtime = inode->i_ctime = current_time(inode);
2562         f2fs_mark_inode_dirty_sync(inode, false);
2563         return len - towrite;
2564 }
2565
2566 int f2fs_dquot_initialize(struct inode *inode)
2567 {
2568         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2569                 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2570                 return -ESRCH;
2571         }
2572
2573         return dquot_initialize(inode);
2574 }
2575
2576 static struct dquot **f2fs_get_dquots(struct inode *inode)
2577 {
2578         return F2FS_I(inode)->i_dquot;
2579 }
2580
2581 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2582 {
2583         return &F2FS_I(inode)->i_reserved_quota;
2584 }
2585
2586 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2587 {
2588         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2589                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2590                 return 0;
2591         }
2592
2593         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2594                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2595 }
2596
2597 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2598 {
2599         int enabled = 0;
2600         int i, err;
2601
2602         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2603                 err = f2fs_enable_quotas(sbi->sb);
2604                 if (err) {
2605                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2606                         return 0;
2607                 }
2608                 return 1;
2609         }
2610
2611         for (i = 0; i < MAXQUOTAS; i++) {
2612                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2613                         err = f2fs_quota_on_mount(sbi, i);
2614                         if (!err) {
2615                                 enabled = 1;
2616                                 continue;
2617                         }
2618                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2619                                  err, i);
2620                 }
2621         }
2622         return enabled;
2623 }
2624
2625 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2626                              unsigned int flags)
2627 {
2628         struct inode *qf_inode;
2629         unsigned long qf_inum;
2630         int err;
2631
2632         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2633
2634         qf_inum = f2fs_qf_ino(sb, type);
2635         if (!qf_inum)
2636                 return -EPERM;
2637
2638         qf_inode = f2fs_iget(sb, qf_inum);
2639         if (IS_ERR(qf_inode)) {
2640                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2641                 return PTR_ERR(qf_inode);
2642         }
2643
2644         /* Don't account quota for quota files to avoid recursion */
2645         qf_inode->i_flags |= S_NOQUOTA;
2646         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2647         iput(qf_inode);
2648         return err;
2649 }
2650
2651 static int f2fs_enable_quotas(struct super_block *sb)
2652 {
2653         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2654         int type, err = 0;
2655         unsigned long qf_inum;
2656         bool quota_mopt[MAXQUOTAS] = {
2657                 test_opt(sbi, USRQUOTA),
2658                 test_opt(sbi, GRPQUOTA),
2659                 test_opt(sbi, PRJQUOTA),
2660         };
2661
2662         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2663                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2664                 return 0;
2665         }
2666
2667         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2668
2669         for (type = 0; type < MAXQUOTAS; type++) {
2670                 qf_inum = f2fs_qf_ino(sb, type);
2671                 if (qf_inum) {
2672                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2673                                 DQUOT_USAGE_ENABLED |
2674                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2675                         if (err) {
2676                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2677                                          type, err);
2678                                 for (type--; type >= 0; type--)
2679                                         dquot_quota_off(sb, type);
2680                                 set_sbi_flag(F2FS_SB(sb),
2681                                                 SBI_QUOTA_NEED_REPAIR);
2682                                 return err;
2683                         }
2684                 }
2685         }
2686         return 0;
2687 }
2688
2689 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2690 {
2691         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2692         struct address_space *mapping = dqopt->files[type]->i_mapping;
2693         int ret = 0;
2694
2695         ret = dquot_writeback_dquots(sbi->sb, type);
2696         if (ret)
2697                 goto out;
2698
2699         ret = filemap_fdatawrite(mapping);
2700         if (ret)
2701                 goto out;
2702
2703         /* if we are using journalled quota */
2704         if (is_journalled_quota(sbi))
2705                 goto out;
2706
2707         ret = filemap_fdatawait(mapping);
2708
2709         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2710 out:
2711         if (ret)
2712                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2713         return ret;
2714 }
2715
2716 int f2fs_quota_sync(struct super_block *sb, int type)
2717 {
2718         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2719         struct quota_info *dqopt = sb_dqopt(sb);
2720         int cnt;
2721         int ret = 0;
2722
2723         /*
2724          * Now when everything is written we can discard the pagecache so
2725          * that userspace sees the changes.
2726          */
2727         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2728
2729                 if (type != -1 && cnt != type)
2730                         continue;
2731
2732                 if (!sb_has_quota_active(sb, cnt))
2733                         continue;
2734
2735                 if (!f2fs_sb_has_quota_ino(sbi))
2736                         inode_lock(dqopt->files[cnt]);
2737
2738                 /*
2739                  * do_quotactl
2740                  *  f2fs_quota_sync
2741                  *  f2fs_down_read(quota_sem)
2742                  *  dquot_writeback_dquots()
2743                  *  f2fs_dquot_commit
2744                  *                            block_operation
2745                  *                            f2fs_down_read(quota_sem)
2746                  */
2747                 f2fs_lock_op(sbi);
2748                 f2fs_down_read(&sbi->quota_sem);
2749
2750                 ret = f2fs_quota_sync_file(sbi, cnt);
2751
2752                 f2fs_up_read(&sbi->quota_sem);
2753                 f2fs_unlock_op(sbi);
2754
2755                 if (!f2fs_sb_has_quota_ino(sbi))
2756                         inode_unlock(dqopt->files[cnt]);
2757
2758                 if (ret)
2759                         break;
2760         }
2761         return ret;
2762 }
2763
2764 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2765                                                         const struct path *path)
2766 {
2767         struct inode *inode;
2768         int err;
2769
2770         /* if quota sysfile exists, deny enabling quota with specific file */
2771         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2772                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2773                 return -EBUSY;
2774         }
2775
2776         err = f2fs_quota_sync(sb, type);
2777         if (err)
2778                 return err;
2779
2780         err = dquot_quota_on(sb, type, format_id, path);
2781         if (err)
2782                 return err;
2783
2784         inode = d_inode(path->dentry);
2785
2786         inode_lock(inode);
2787         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2788         f2fs_set_inode_flags(inode);
2789         inode_unlock(inode);
2790         f2fs_mark_inode_dirty_sync(inode, false);
2791
2792         return 0;
2793 }
2794
2795 static int __f2fs_quota_off(struct super_block *sb, int type)
2796 {
2797         struct inode *inode = sb_dqopt(sb)->files[type];
2798         int err;
2799
2800         if (!inode || !igrab(inode))
2801                 return dquot_quota_off(sb, type);
2802
2803         err = f2fs_quota_sync(sb, type);
2804         if (err)
2805                 goto out_put;
2806
2807         err = dquot_quota_off(sb, type);
2808         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2809                 goto out_put;
2810
2811         inode_lock(inode);
2812         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2813         f2fs_set_inode_flags(inode);
2814         inode_unlock(inode);
2815         f2fs_mark_inode_dirty_sync(inode, false);
2816 out_put:
2817         iput(inode);
2818         return err;
2819 }
2820
2821 static int f2fs_quota_off(struct super_block *sb, int type)
2822 {
2823         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2824         int err;
2825
2826         err = __f2fs_quota_off(sb, type);
2827
2828         /*
2829          * quotactl can shutdown journalled quota, result in inconsistence
2830          * between quota record and fs data by following updates, tag the
2831          * flag to let fsck be aware of it.
2832          */
2833         if (is_journalled_quota(sbi))
2834                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2835         return err;
2836 }
2837
2838 void f2fs_quota_off_umount(struct super_block *sb)
2839 {
2840         int type;
2841         int err;
2842
2843         for (type = 0; type < MAXQUOTAS; type++) {
2844                 err = __f2fs_quota_off(sb, type);
2845                 if (err) {
2846                         int ret = dquot_quota_off(sb, type);
2847
2848                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2849                                  type, err, ret);
2850                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2851                 }
2852         }
2853         /*
2854          * In case of checkpoint=disable, we must flush quota blocks.
2855          * This can cause NULL exception for node_inode in end_io, since
2856          * put_super already dropped it.
2857          */
2858         sync_filesystem(sb);
2859 }
2860
2861 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2862 {
2863         struct quota_info *dqopt = sb_dqopt(sb);
2864         int type;
2865
2866         for (type = 0; type < MAXQUOTAS; type++) {
2867                 if (!dqopt->files[type])
2868                         continue;
2869                 f2fs_inode_synced(dqopt->files[type]);
2870         }
2871 }
2872
2873 static int f2fs_dquot_commit(struct dquot *dquot)
2874 {
2875         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2876         int ret;
2877
2878         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2879         ret = dquot_commit(dquot);
2880         if (ret < 0)
2881                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2882         f2fs_up_read(&sbi->quota_sem);
2883         return ret;
2884 }
2885
2886 static int f2fs_dquot_acquire(struct dquot *dquot)
2887 {
2888         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2889         int ret;
2890
2891         f2fs_down_read(&sbi->quota_sem);
2892         ret = dquot_acquire(dquot);
2893         if (ret < 0)
2894                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2895         f2fs_up_read(&sbi->quota_sem);
2896         return ret;
2897 }
2898
2899 static int f2fs_dquot_release(struct dquot *dquot)
2900 {
2901         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2902         int ret = dquot_release(dquot);
2903
2904         if (ret < 0)
2905                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2906         return ret;
2907 }
2908
2909 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2910 {
2911         struct super_block *sb = dquot->dq_sb;
2912         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2913         int ret = dquot_mark_dquot_dirty(dquot);
2914
2915         /* if we are using journalled quota */
2916         if (is_journalled_quota(sbi))
2917                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2918
2919         return ret;
2920 }
2921
2922 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2923 {
2924         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2925         int ret = dquot_commit_info(sb, type);
2926
2927         if (ret < 0)
2928                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2929         return ret;
2930 }
2931
2932 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2933 {
2934         *projid = F2FS_I(inode)->i_projid;
2935         return 0;
2936 }
2937
2938 static const struct dquot_operations f2fs_quota_operations = {
2939         .get_reserved_space = f2fs_get_reserved_space,
2940         .write_dquot    = f2fs_dquot_commit,
2941         .acquire_dquot  = f2fs_dquot_acquire,
2942         .release_dquot  = f2fs_dquot_release,
2943         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2944         .write_info     = f2fs_dquot_commit_info,
2945         .alloc_dquot    = dquot_alloc,
2946         .destroy_dquot  = dquot_destroy,
2947         .get_projid     = f2fs_get_projid,
2948         .get_next_id    = dquot_get_next_id,
2949 };
2950
2951 static const struct quotactl_ops f2fs_quotactl_ops = {
2952         .quota_on       = f2fs_quota_on,
2953         .quota_off      = f2fs_quota_off,
2954         .quota_sync     = f2fs_quota_sync,
2955         .get_state      = dquot_get_state,
2956         .set_info       = dquot_set_dqinfo,
2957         .get_dqblk      = dquot_get_dqblk,
2958         .set_dqblk      = dquot_set_dqblk,
2959         .get_nextdqblk  = dquot_get_next_dqblk,
2960 };
2961 #else
2962 int f2fs_dquot_initialize(struct inode *inode)
2963 {
2964         return 0;
2965 }
2966
2967 int f2fs_quota_sync(struct super_block *sb, int type)
2968 {
2969         return 0;
2970 }
2971
2972 void f2fs_quota_off_umount(struct super_block *sb)
2973 {
2974 }
2975 #endif
2976
2977 static const struct super_operations f2fs_sops = {
2978         .alloc_inode    = f2fs_alloc_inode,
2979         .free_inode     = f2fs_free_inode,
2980         .drop_inode     = f2fs_drop_inode,
2981         .write_inode    = f2fs_write_inode,
2982         .dirty_inode    = f2fs_dirty_inode,
2983         .show_options   = f2fs_show_options,
2984 #ifdef CONFIG_QUOTA
2985         .quota_read     = f2fs_quota_read,
2986         .quota_write    = f2fs_quota_write,
2987         .get_dquots     = f2fs_get_dquots,
2988 #endif
2989         .evict_inode    = f2fs_evict_inode,
2990         .put_super      = f2fs_put_super,
2991         .sync_fs        = f2fs_sync_fs,
2992         .freeze_fs      = f2fs_freeze,
2993         .unfreeze_fs    = f2fs_unfreeze,
2994         .statfs         = f2fs_statfs,
2995         .remount_fs     = f2fs_remount,
2996 };
2997
2998 #ifdef CONFIG_FS_ENCRYPTION
2999 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3000 {
3001         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3002                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3003                                 ctx, len, NULL);
3004 }
3005
3006 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3007                                                         void *fs_data)
3008 {
3009         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3010
3011         /*
3012          * Encrypting the root directory is not allowed because fsck
3013          * expects lost+found directory to exist and remain unencrypted
3014          * if LOST_FOUND feature is enabled.
3015          *
3016          */
3017         if (f2fs_sb_has_lost_found(sbi) &&
3018                         inode->i_ino == F2FS_ROOT_INO(sbi))
3019                 return -EPERM;
3020
3021         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3022                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3023                                 ctx, len, fs_data, XATTR_CREATE);
3024 }
3025
3026 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3027 {
3028         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3029 }
3030
3031 static bool f2fs_has_stable_inodes(struct super_block *sb)
3032 {
3033         return true;
3034 }
3035
3036 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3037                                        int *ino_bits_ret, int *lblk_bits_ret)
3038 {
3039         *ino_bits_ret = 8 * sizeof(nid_t);
3040         *lblk_bits_ret = 8 * sizeof(block_t);
3041 }
3042
3043 static struct block_device **f2fs_get_devices(struct super_block *sb,
3044                                               unsigned int *num_devs)
3045 {
3046         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3047         struct block_device **devs;
3048         int i;
3049
3050         if (!f2fs_is_multi_device(sbi))
3051                 return NULL;
3052
3053         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3054         if (!devs)
3055                 return ERR_PTR(-ENOMEM);
3056
3057         for (i = 0; i < sbi->s_ndevs; i++)
3058                 devs[i] = FDEV(i).bdev;
3059         *num_devs = sbi->s_ndevs;
3060         return devs;
3061 }
3062
3063 static const struct fscrypt_operations f2fs_cryptops = {
3064         .key_prefix             = "f2fs:",
3065         .get_context            = f2fs_get_context,
3066         .set_context            = f2fs_set_context,
3067         .get_dummy_policy       = f2fs_get_dummy_policy,
3068         .empty_dir              = f2fs_empty_dir,
3069         .has_stable_inodes      = f2fs_has_stable_inodes,
3070         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3071         .get_devices            = f2fs_get_devices,
3072 };
3073 #endif
3074
3075 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3076                 u64 ino, u32 generation)
3077 {
3078         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3079         struct inode *inode;
3080
3081         if (f2fs_check_nid_range(sbi, ino))
3082                 return ERR_PTR(-ESTALE);
3083
3084         /*
3085          * f2fs_iget isn't quite right if the inode is currently unallocated!
3086          * However f2fs_iget currently does appropriate checks to handle stale
3087          * inodes so everything is OK.
3088          */
3089         inode = f2fs_iget(sb, ino);
3090         if (IS_ERR(inode))
3091                 return ERR_CAST(inode);
3092         if (unlikely(generation && inode->i_generation != generation)) {
3093                 /* we didn't find the right inode.. */
3094                 iput(inode);
3095                 return ERR_PTR(-ESTALE);
3096         }
3097         return inode;
3098 }
3099
3100 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3101                 int fh_len, int fh_type)
3102 {
3103         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3104                                     f2fs_nfs_get_inode);
3105 }
3106
3107 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3108                 int fh_len, int fh_type)
3109 {
3110         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3111                                     f2fs_nfs_get_inode);
3112 }
3113
3114 static const struct export_operations f2fs_export_ops = {
3115         .fh_to_dentry = f2fs_fh_to_dentry,
3116         .fh_to_parent = f2fs_fh_to_parent,
3117         .get_parent = f2fs_get_parent,
3118 };
3119
3120 loff_t max_file_blocks(struct inode *inode)
3121 {
3122         loff_t result = 0;
3123         loff_t leaf_count;
3124
3125         /*
3126          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3127          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3128          * space in inode.i_addr, it will be more safe to reassign
3129          * result as zero.
3130          */
3131
3132         if (inode && f2fs_compressed_file(inode))
3133                 leaf_count = ADDRS_PER_BLOCK(inode);
3134         else
3135                 leaf_count = DEF_ADDRS_PER_BLOCK;
3136
3137         /* two direct node blocks */
3138         result += (leaf_count * 2);
3139
3140         /* two indirect node blocks */
3141         leaf_count *= NIDS_PER_BLOCK;
3142         result += (leaf_count * 2);
3143
3144         /* one double indirect node block */
3145         leaf_count *= NIDS_PER_BLOCK;
3146         result += leaf_count;
3147
3148         return result;
3149 }
3150
3151 static int __f2fs_commit_super(struct buffer_head *bh,
3152                         struct f2fs_super_block *super)
3153 {
3154         lock_buffer(bh);
3155         if (super)
3156                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3157         set_buffer_dirty(bh);
3158         unlock_buffer(bh);
3159
3160         /* it's rare case, we can do fua all the time */
3161         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3162 }
3163
3164 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3165                                         struct buffer_head *bh)
3166 {
3167         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3168                                         (bh->b_data + F2FS_SUPER_OFFSET);
3169         struct super_block *sb = sbi->sb;
3170         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3171         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3172         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3173         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3174         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3175         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3176         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3177         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3178         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3179         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3180         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3181         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3182         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3183         u64 main_end_blkaddr = main_blkaddr +
3184                                 (segment_count_main << log_blocks_per_seg);
3185         u64 seg_end_blkaddr = segment0_blkaddr +
3186                                 (segment_count << log_blocks_per_seg);
3187
3188         if (segment0_blkaddr != cp_blkaddr) {
3189                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3190                           segment0_blkaddr, cp_blkaddr);
3191                 return true;
3192         }
3193
3194         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3195                                                         sit_blkaddr) {
3196                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3197                           cp_blkaddr, sit_blkaddr,
3198                           segment_count_ckpt << log_blocks_per_seg);
3199                 return true;
3200         }
3201
3202         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3203                                                         nat_blkaddr) {
3204                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3205                           sit_blkaddr, nat_blkaddr,
3206                           segment_count_sit << log_blocks_per_seg);
3207                 return true;
3208         }
3209
3210         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3211                                                         ssa_blkaddr) {
3212                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3213                           nat_blkaddr, ssa_blkaddr,
3214                           segment_count_nat << log_blocks_per_seg);
3215                 return true;
3216         }
3217
3218         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3219                                                         main_blkaddr) {
3220                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3221                           ssa_blkaddr, main_blkaddr,
3222                           segment_count_ssa << log_blocks_per_seg);
3223                 return true;
3224         }
3225
3226         if (main_end_blkaddr > seg_end_blkaddr) {
3227                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3228                           main_blkaddr, seg_end_blkaddr,
3229                           segment_count_main << log_blocks_per_seg);
3230                 return true;
3231         } else if (main_end_blkaddr < seg_end_blkaddr) {
3232                 int err = 0;
3233                 char *res;
3234
3235                 /* fix in-memory information all the time */
3236                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3237                                 segment0_blkaddr) >> log_blocks_per_seg);
3238
3239                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3240                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3241                         res = "internally";
3242                 } else {
3243                         err = __f2fs_commit_super(bh, NULL);
3244                         res = err ? "failed" : "done";
3245                 }
3246                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3247                           res, main_blkaddr, seg_end_blkaddr,
3248                           segment_count_main << log_blocks_per_seg);
3249                 if (err)
3250                         return true;
3251         }
3252         return false;
3253 }
3254
3255 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3256                                 struct buffer_head *bh)
3257 {
3258         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3259         block_t total_sections, blocks_per_seg;
3260         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3261                                         (bh->b_data + F2FS_SUPER_OFFSET);
3262         size_t crc_offset = 0;
3263         __u32 crc = 0;
3264
3265         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3266                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3267                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3268                 return -EINVAL;
3269         }
3270
3271         /* Check checksum_offset and crc in superblock */
3272         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3273                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3274                 if (crc_offset !=
3275                         offsetof(struct f2fs_super_block, crc)) {
3276                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3277                                   crc_offset);
3278                         return -EFSCORRUPTED;
3279                 }
3280                 crc = le32_to_cpu(raw_super->crc);
3281                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3282                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3283                         return -EFSCORRUPTED;
3284                 }
3285         }
3286
3287         /* Currently, support only 4KB block size */
3288         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3289                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3290                           le32_to_cpu(raw_super->log_blocksize),
3291                           F2FS_BLKSIZE_BITS);
3292                 return -EFSCORRUPTED;
3293         }
3294
3295         /* check log blocks per segment */
3296         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3297                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3298                           le32_to_cpu(raw_super->log_blocks_per_seg));
3299                 return -EFSCORRUPTED;
3300         }
3301
3302         /* Currently, support 512/1024/2048/4096 bytes sector size */
3303         if (le32_to_cpu(raw_super->log_sectorsize) >
3304                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3305                 le32_to_cpu(raw_super->log_sectorsize) <
3306                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3307                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3308                           le32_to_cpu(raw_super->log_sectorsize));
3309                 return -EFSCORRUPTED;
3310         }
3311         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3312                 le32_to_cpu(raw_super->log_sectorsize) !=
3313                         F2FS_MAX_LOG_SECTOR_SIZE) {
3314                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3315                           le32_to_cpu(raw_super->log_sectors_per_block),
3316                           le32_to_cpu(raw_super->log_sectorsize));
3317                 return -EFSCORRUPTED;
3318         }
3319
3320         segment_count = le32_to_cpu(raw_super->segment_count);
3321         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3322         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3323         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3324         total_sections = le32_to_cpu(raw_super->section_count);
3325
3326         /* blocks_per_seg should be 512, given the above check */
3327         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3328
3329         if (segment_count > F2FS_MAX_SEGMENT ||
3330                                 segment_count < F2FS_MIN_SEGMENTS) {
3331                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3332                 return -EFSCORRUPTED;
3333         }
3334
3335         if (total_sections > segment_count_main || total_sections < 1 ||
3336                         segs_per_sec > segment_count || !segs_per_sec) {
3337                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3338                           segment_count, total_sections, segs_per_sec);
3339                 return -EFSCORRUPTED;
3340         }
3341
3342         if (segment_count_main != total_sections * segs_per_sec) {
3343                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3344                           segment_count_main, total_sections, segs_per_sec);
3345                 return -EFSCORRUPTED;
3346         }
3347
3348         if ((segment_count / segs_per_sec) < total_sections) {
3349                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3350                           segment_count, segs_per_sec, total_sections);
3351                 return -EFSCORRUPTED;
3352         }
3353
3354         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3355                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3356                           segment_count, le64_to_cpu(raw_super->block_count));
3357                 return -EFSCORRUPTED;
3358         }
3359
3360         if (RDEV(0).path[0]) {
3361                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3362                 int i = 1;
3363
3364                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3365                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3366                         i++;
3367                 }
3368                 if (segment_count != dev_seg_count) {
3369                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3370                                         segment_count, dev_seg_count);
3371                         return -EFSCORRUPTED;
3372                 }
3373         } else {
3374                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3375                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3376                         f2fs_info(sbi, "Zoned block device path is missing");
3377                         return -EFSCORRUPTED;
3378                 }
3379         }
3380
3381         if (secs_per_zone > total_sections || !secs_per_zone) {
3382                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3383                           secs_per_zone, total_sections);
3384                 return -EFSCORRUPTED;
3385         }
3386         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3387                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3388                         (le32_to_cpu(raw_super->extension_count) +
3389                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3390                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3391                           le32_to_cpu(raw_super->extension_count),
3392                           raw_super->hot_ext_count,
3393                           F2FS_MAX_EXTENSION);
3394                 return -EFSCORRUPTED;
3395         }
3396
3397         if (le32_to_cpu(raw_super->cp_payload) >=
3398                                 (blocks_per_seg - F2FS_CP_PACKS -
3399                                 NR_CURSEG_PERSIST_TYPE)) {
3400                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3401                           le32_to_cpu(raw_super->cp_payload),
3402                           blocks_per_seg - F2FS_CP_PACKS -
3403                           NR_CURSEG_PERSIST_TYPE);
3404                 return -EFSCORRUPTED;
3405         }
3406
3407         /* check reserved ino info */
3408         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3409                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3410                 le32_to_cpu(raw_super->root_ino) != 3) {
3411                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3412                           le32_to_cpu(raw_super->node_ino),
3413                           le32_to_cpu(raw_super->meta_ino),
3414                           le32_to_cpu(raw_super->root_ino));
3415                 return -EFSCORRUPTED;
3416         }
3417
3418         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3419         if (sanity_check_area_boundary(sbi, bh))
3420                 return -EFSCORRUPTED;
3421
3422         return 0;
3423 }
3424
3425 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3426 {
3427         unsigned int total, fsmeta;
3428         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3429         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3430         unsigned int ovp_segments, reserved_segments;
3431         unsigned int main_segs, blocks_per_seg;
3432         unsigned int sit_segs, nat_segs;
3433         unsigned int sit_bitmap_size, nat_bitmap_size;
3434         unsigned int log_blocks_per_seg;
3435         unsigned int segment_count_main;
3436         unsigned int cp_pack_start_sum, cp_payload;
3437         block_t user_block_count, valid_user_blocks;
3438         block_t avail_node_count, valid_node_count;
3439         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3440         int i, j;
3441
3442         total = le32_to_cpu(raw_super->segment_count);
3443         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3444         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3445         fsmeta += sit_segs;
3446         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3447         fsmeta += nat_segs;
3448         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3449         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3450
3451         if (unlikely(fsmeta >= total))
3452                 return 1;
3453
3454         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3455         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3456
3457         if (!f2fs_sb_has_readonly(sbi) &&
3458                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3459                         ovp_segments == 0 || reserved_segments == 0)) {
3460                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3461                 return 1;
3462         }
3463         user_block_count = le64_to_cpu(ckpt->user_block_count);
3464         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3465                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3466         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3467         if (!user_block_count || user_block_count >=
3468                         segment_count_main << log_blocks_per_seg) {
3469                 f2fs_err(sbi, "Wrong user_block_count: %u",
3470                          user_block_count);
3471                 return 1;
3472         }
3473
3474         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3475         if (valid_user_blocks > user_block_count) {
3476                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3477                          valid_user_blocks, user_block_count);
3478                 return 1;
3479         }
3480
3481         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3482         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3483         if (valid_node_count > avail_node_count) {
3484                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3485                          valid_node_count, avail_node_count);
3486                 return 1;
3487         }
3488
3489         main_segs = le32_to_cpu(raw_super->segment_count_main);
3490         blocks_per_seg = sbi->blocks_per_seg;
3491
3492         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3493                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3494                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3495                         return 1;
3496
3497                 if (f2fs_sb_has_readonly(sbi))
3498                         goto check_data;
3499
3500                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3501                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3502                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3503                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3504                                          i, j,
3505                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3506                                 return 1;
3507                         }
3508                 }
3509         }
3510 check_data:
3511         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3512                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3513                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3514                         return 1;
3515
3516                 if (f2fs_sb_has_readonly(sbi))
3517                         goto skip_cross;
3518
3519                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3520                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3521                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3522                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3523                                          i, j,
3524                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3525                                 return 1;
3526                         }
3527                 }
3528         }
3529         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3530                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3531                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3532                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3533                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3534                                          i, j,
3535                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3536                                 return 1;
3537                         }
3538                 }
3539         }
3540 skip_cross:
3541         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3542         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3543
3544         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3545                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3546                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3547                          sit_bitmap_size, nat_bitmap_size);
3548                 return 1;
3549         }
3550
3551         cp_pack_start_sum = __start_sum_addr(sbi);
3552         cp_payload = __cp_payload(sbi);
3553         if (cp_pack_start_sum < cp_payload + 1 ||
3554                 cp_pack_start_sum > blocks_per_seg - 1 -
3555                         NR_CURSEG_PERSIST_TYPE) {
3556                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3557                          cp_pack_start_sum);
3558                 return 1;
3559         }
3560
3561         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3562                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3563                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3564                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3565                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3566                           le32_to_cpu(ckpt->checksum_offset));
3567                 return 1;
3568         }
3569
3570         nat_blocks = nat_segs << log_blocks_per_seg;
3571         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3572         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3573         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3574                 (cp_payload + F2FS_CP_PACKS +
3575                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3576                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3577                           cp_payload, nat_bits_blocks);
3578                 return 1;
3579         }
3580
3581         if (unlikely(f2fs_cp_error(sbi))) {
3582                 f2fs_err(sbi, "A bug case: need to run fsck");
3583                 return 1;
3584         }
3585         return 0;
3586 }
3587
3588 static void init_sb_info(struct f2fs_sb_info *sbi)
3589 {
3590         struct f2fs_super_block *raw_super = sbi->raw_super;
3591         int i;
3592
3593         sbi->log_sectors_per_block =
3594                 le32_to_cpu(raw_super->log_sectors_per_block);
3595         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3596         sbi->blocksize = 1 << sbi->log_blocksize;
3597         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3598         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3599         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3600         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3601         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3602         sbi->total_node_count =
3603                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3604                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3605         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3606         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3607         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3608         sbi->cur_victim_sec = NULL_SECNO;
3609         sbi->gc_mode = GC_NORMAL;
3610         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3611         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3612         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3613         sbi->migration_granularity = sbi->segs_per_sec;
3614         sbi->seq_file_ra_mul = MIN_RA_MUL;
3615         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3616         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3617         spin_lock_init(&sbi->gc_urgent_high_lock);
3618         atomic64_set(&sbi->current_atomic_write, 0);
3619
3620         sbi->dir_level = DEF_DIR_LEVEL;
3621         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3622         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3623         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3624         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3625         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3626         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3627                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3628         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3629
3630         for (i = 0; i < NR_COUNT_TYPE; i++)
3631                 atomic_set(&sbi->nr_pages[i], 0);
3632
3633         for (i = 0; i < META; i++)
3634                 atomic_set(&sbi->wb_sync_req[i], 0);
3635
3636         INIT_LIST_HEAD(&sbi->s_list);
3637         mutex_init(&sbi->umount_mutex);
3638         init_f2fs_rwsem(&sbi->io_order_lock);
3639         spin_lock_init(&sbi->cp_lock);
3640
3641         sbi->dirty_device = 0;
3642         spin_lock_init(&sbi->dev_lock);
3643
3644         init_f2fs_rwsem(&sbi->sb_lock);
3645         init_f2fs_rwsem(&sbi->pin_sem);
3646 }
3647
3648 static int init_percpu_info(struct f2fs_sb_info *sbi)
3649 {
3650         int err;
3651
3652         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3653         if (err)
3654                 return err;
3655
3656         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3657         if (err)
3658                 goto err_valid_block;
3659
3660         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3661                                                                 GFP_KERNEL);
3662         if (err)
3663                 goto err_node_block;
3664         return 0;
3665
3666 err_node_block:
3667         percpu_counter_destroy(&sbi->rf_node_block_count);
3668 err_valid_block:
3669         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3670         return err;
3671 }
3672
3673 #ifdef CONFIG_BLK_DEV_ZONED
3674
3675 struct f2fs_report_zones_args {
3676         struct f2fs_sb_info *sbi;
3677         struct f2fs_dev_info *dev;
3678 };
3679
3680 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3681                               void *data)
3682 {
3683         struct f2fs_report_zones_args *rz_args = data;
3684         block_t unusable_blocks = (zone->len - zone->capacity) >>
3685                                         F2FS_LOG_SECTORS_PER_BLOCK;
3686
3687         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3688                 return 0;
3689
3690         set_bit(idx, rz_args->dev->blkz_seq);
3691         if (!rz_args->sbi->unusable_blocks_per_sec) {
3692                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3693                 return 0;
3694         }
3695         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3696                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3697                 return -EINVAL;
3698         }
3699         return 0;
3700 }
3701
3702 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3703 {
3704         struct block_device *bdev = FDEV(devi).bdev;
3705         sector_t nr_sectors = bdev_nr_sectors(bdev);
3706         struct f2fs_report_zones_args rep_zone_arg;
3707         u64 zone_sectors;
3708         int ret;
3709
3710         if (!f2fs_sb_has_blkzoned(sbi))
3711                 return 0;
3712
3713         zone_sectors = bdev_zone_sectors(bdev);
3714         if (!is_power_of_2(zone_sectors)) {
3715                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3716                 return -EINVAL;
3717         }
3718
3719         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3720                                 SECTOR_TO_BLOCK(zone_sectors))
3721                 return -EINVAL;
3722         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3723         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3724                                 __ilog2_u32(sbi->blocks_per_blkz))
3725                 return -EINVAL;
3726         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3727         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3728                                         sbi->log_blocks_per_blkz;
3729         if (nr_sectors & (zone_sectors - 1))
3730                 FDEV(devi).nr_blkz++;
3731
3732         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3733                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3734                                         * sizeof(unsigned long),
3735                                         GFP_KERNEL);
3736         if (!FDEV(devi).blkz_seq)
3737                 return -ENOMEM;
3738
3739         rep_zone_arg.sbi = sbi;
3740         rep_zone_arg.dev = &FDEV(devi);
3741
3742         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3743                                   &rep_zone_arg);
3744         if (ret < 0)
3745                 return ret;
3746         return 0;
3747 }
3748 #endif
3749
3750 /*
3751  * Read f2fs raw super block.
3752  * Because we have two copies of super block, so read both of them
3753  * to get the first valid one. If any one of them is broken, we pass
3754  * them recovery flag back to the caller.
3755  */
3756 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3757                         struct f2fs_super_block **raw_super,
3758                         int *valid_super_block, int *recovery)
3759 {
3760         struct super_block *sb = sbi->sb;
3761         int block;
3762         struct buffer_head *bh;
3763         struct f2fs_super_block *super;
3764         int err = 0;
3765
3766         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3767         if (!super)
3768                 return -ENOMEM;
3769
3770         for (block = 0; block < 2; block++) {
3771                 bh = sb_bread(sb, block);
3772                 if (!bh) {
3773                         f2fs_err(sbi, "Unable to read %dth superblock",
3774                                  block + 1);
3775                         err = -EIO;
3776                         *recovery = 1;
3777                         continue;
3778                 }
3779
3780                 /* sanity checking of raw super */
3781                 err = sanity_check_raw_super(sbi, bh);
3782                 if (err) {
3783                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3784                                  block + 1);
3785                         brelse(bh);
3786                         *recovery = 1;
3787                         continue;
3788                 }
3789
3790                 if (!*raw_super) {
3791                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3792                                                         sizeof(*super));
3793                         *valid_super_block = block;
3794                         *raw_super = super;
3795                 }
3796                 brelse(bh);
3797         }
3798
3799         /* No valid superblock */
3800         if (!*raw_super)
3801                 kfree(super);
3802         else
3803                 err = 0;
3804
3805         return err;
3806 }
3807
3808 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3809 {
3810         struct buffer_head *bh;
3811         __u32 crc = 0;
3812         int err;
3813
3814         if ((recover && f2fs_readonly(sbi->sb)) ||
3815                                 bdev_read_only(sbi->sb->s_bdev)) {
3816                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3817                 return -EROFS;
3818         }
3819
3820         /* we should update superblock crc here */
3821         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3822                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3823                                 offsetof(struct f2fs_super_block, crc));
3824                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3825         }
3826
3827         /* write back-up superblock first */
3828         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3829         if (!bh)
3830                 return -EIO;
3831         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3832         brelse(bh);
3833
3834         /* if we are in recovery path, skip writing valid superblock */
3835         if (recover || err)
3836                 return err;
3837
3838         /* write current valid superblock */
3839         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3840         if (!bh)
3841                 return -EIO;
3842         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3843         brelse(bh);
3844         return err;
3845 }
3846
3847 void f2fs_handle_stop(struct f2fs_sb_info *sbi, unsigned char reason)
3848 {
3849         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3850         int err;
3851
3852         f2fs_down_write(&sbi->sb_lock);
3853
3854         if (raw_super->s_stop_reason[reason] < ((1 << BITS_PER_BYTE) - 1))
3855                 raw_super->s_stop_reason[reason]++;
3856
3857         err = f2fs_commit_super(sbi, false);
3858         if (err)
3859                 f2fs_err(sbi, "f2fs_commit_super fails to record reason:%u err:%d",
3860                                                                 reason, err);
3861         f2fs_up_write(&sbi->sb_lock);
3862 }
3863
3864 static void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
3865 {
3866         spin_lock(&sbi->error_lock);
3867         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
3868                 set_bit(flag, (unsigned long *)sbi->errors);
3869                 sbi->error_dirty = true;
3870         }
3871         spin_unlock(&sbi->error_lock);
3872 }
3873
3874 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
3875 {
3876         bool need_update = false;
3877
3878         spin_lock(&sbi->error_lock);
3879         if (sbi->error_dirty) {
3880                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
3881                                                         MAX_F2FS_ERRORS);
3882                 sbi->error_dirty = false;
3883                 need_update = true;
3884         }
3885         spin_unlock(&sbi->error_lock);
3886
3887         return need_update;
3888 }
3889
3890 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
3891 {
3892         int err;
3893
3894         f2fs_save_errors(sbi, error);
3895
3896         f2fs_down_write(&sbi->sb_lock);
3897
3898         if (!f2fs_update_errors(sbi))
3899                 goto out_unlock;
3900
3901         err = f2fs_commit_super(sbi, false);
3902         if (err)
3903                 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d",
3904                                                                 error, err);
3905 out_unlock:
3906         f2fs_up_write(&sbi->sb_lock);
3907 }
3908
3909 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3910 {
3911         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3912         unsigned int max_devices = MAX_DEVICES;
3913         unsigned int logical_blksize;
3914         int i;
3915
3916         /* Initialize single device information */
3917         if (!RDEV(0).path[0]) {
3918                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3919                         return 0;
3920                 max_devices = 1;
3921         }
3922
3923         /*
3924          * Initialize multiple devices information, or single
3925          * zoned block device information.
3926          */
3927         sbi->devs = f2fs_kzalloc(sbi,
3928                                  array_size(max_devices,
3929                                             sizeof(struct f2fs_dev_info)),
3930                                  GFP_KERNEL);
3931         if (!sbi->devs)
3932                 return -ENOMEM;
3933
3934         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3935         sbi->aligned_blksize = true;
3936
3937         for (i = 0; i < max_devices; i++) {
3938
3939                 if (i > 0 && !RDEV(i).path[0])
3940                         break;
3941
3942                 if (max_devices == 1) {
3943                         /* Single zoned block device mount */
3944                         FDEV(0).bdev =
3945                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3946                                         sbi->sb->s_mode, sbi->sb->s_type);
3947                 } else {
3948                         /* Multi-device mount */
3949                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3950                         FDEV(i).total_segments =
3951                                 le32_to_cpu(RDEV(i).total_segments);
3952                         if (i == 0) {
3953                                 FDEV(i).start_blk = 0;
3954                                 FDEV(i).end_blk = FDEV(i).start_blk +
3955                                     (FDEV(i).total_segments <<
3956                                     sbi->log_blocks_per_seg) - 1 +
3957                                     le32_to_cpu(raw_super->segment0_blkaddr);
3958                         } else {
3959                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3960                                 FDEV(i).end_blk = FDEV(i).start_blk +
3961                                         (FDEV(i).total_segments <<
3962                                         sbi->log_blocks_per_seg) - 1;
3963                         }
3964                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3965                                         sbi->sb->s_mode, sbi->sb->s_type);
3966                 }
3967                 if (IS_ERR(FDEV(i).bdev))
3968                         return PTR_ERR(FDEV(i).bdev);
3969
3970                 /* to release errored devices */
3971                 sbi->s_ndevs = i + 1;
3972
3973                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
3974                         sbi->aligned_blksize = false;
3975
3976 #ifdef CONFIG_BLK_DEV_ZONED
3977                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3978                                 !f2fs_sb_has_blkzoned(sbi)) {
3979                         f2fs_err(sbi, "Zoned block device feature not enabled");
3980                         return -EINVAL;
3981                 }
3982                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3983                         if (init_blkz_info(sbi, i)) {
3984                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3985                                 return -EINVAL;
3986                         }
3987                         if (max_devices == 1)
3988                                 break;
3989                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3990                                   i, FDEV(i).path,
3991                                   FDEV(i).total_segments,
3992                                   FDEV(i).start_blk, FDEV(i).end_blk,
3993                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3994                                   "Host-aware" : "Host-managed");
3995                         continue;
3996                 }
3997 #endif
3998                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3999                           i, FDEV(i).path,
4000                           FDEV(i).total_segments,
4001                           FDEV(i).start_blk, FDEV(i).end_blk);
4002         }
4003         f2fs_info(sbi,
4004                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
4005         return 0;
4006 }
4007
4008 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4009 {
4010 #if IS_ENABLED(CONFIG_UNICODE)
4011         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4012                 const struct f2fs_sb_encodings *encoding_info;
4013                 struct unicode_map *encoding;
4014                 __u16 encoding_flags;
4015
4016                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4017                 if (!encoding_info) {
4018                         f2fs_err(sbi,
4019                                  "Encoding requested by superblock is unknown");
4020                         return -EINVAL;
4021                 }
4022
4023                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4024                 encoding = utf8_load(encoding_info->version);
4025                 if (IS_ERR(encoding)) {
4026                         f2fs_err(sbi,
4027                                  "can't mount with superblock charset: %s-%u.%u.%u "
4028                                  "not supported by the kernel. flags: 0x%x.",
4029                                  encoding_info->name,
4030                                  unicode_major(encoding_info->version),
4031                                  unicode_minor(encoding_info->version),
4032                                  unicode_rev(encoding_info->version),
4033                                  encoding_flags);
4034                         return PTR_ERR(encoding);
4035                 }
4036                 f2fs_info(sbi, "Using encoding defined by superblock: "
4037                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4038                          unicode_major(encoding_info->version),
4039                          unicode_minor(encoding_info->version),
4040                          unicode_rev(encoding_info->version),
4041                          encoding_flags);
4042
4043                 sbi->sb->s_encoding = encoding;
4044                 sbi->sb->s_encoding_flags = encoding_flags;
4045         }
4046 #else
4047         if (f2fs_sb_has_casefold(sbi)) {
4048                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4049                 return -EINVAL;
4050         }
4051 #endif
4052         return 0;
4053 }
4054
4055 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4056 {
4057         struct f2fs_sm_info *sm_i = SM_I(sbi);
4058
4059         /* adjust parameters according to the volume size */
4060         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
4061                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
4062                 if (f2fs_block_unit_discard(sbi))
4063                         sm_i->dcc_info->discard_granularity = 1;
4064                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE |
4065                                         1 << F2FS_IPU_HONOR_OPU_WRITE;
4066         }
4067
4068         sbi->readdir_ra = 1;
4069 }
4070
4071 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4072 {
4073         struct f2fs_sb_info *sbi;
4074         struct f2fs_super_block *raw_super;
4075         struct inode *root;
4076         int err;
4077         bool skip_recovery = false, need_fsck = false;
4078         char *options = NULL;
4079         int recovery, i, valid_super_block;
4080         struct curseg_info *seg_i;
4081         int retry_cnt = 1;
4082
4083 try_onemore:
4084         err = -EINVAL;
4085         raw_super = NULL;
4086         valid_super_block = -1;
4087         recovery = 0;
4088
4089         /* allocate memory for f2fs-specific super block info */
4090         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4091         if (!sbi)
4092                 return -ENOMEM;
4093
4094         sbi->sb = sb;
4095
4096         /* initialize locks within allocated memory */
4097         init_f2fs_rwsem(&sbi->gc_lock);
4098         mutex_init(&sbi->writepages);
4099         init_f2fs_rwsem(&sbi->cp_global_sem);
4100         init_f2fs_rwsem(&sbi->node_write);
4101         init_f2fs_rwsem(&sbi->node_change);
4102         spin_lock_init(&sbi->stat_lock);
4103         init_f2fs_rwsem(&sbi->cp_rwsem);
4104         init_f2fs_rwsem(&sbi->quota_sem);
4105         init_waitqueue_head(&sbi->cp_wait);
4106         spin_lock_init(&sbi->error_lock);
4107
4108         for (i = 0; i < NR_INODE_TYPE; i++) {
4109                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4110                 spin_lock_init(&sbi->inode_lock[i]);
4111         }
4112         mutex_init(&sbi->flush_lock);
4113
4114         /* Load the checksum driver */
4115         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4116         if (IS_ERR(sbi->s_chksum_driver)) {
4117                 f2fs_err(sbi, "Cannot load crc32 driver.");
4118                 err = PTR_ERR(sbi->s_chksum_driver);
4119                 sbi->s_chksum_driver = NULL;
4120                 goto free_sbi;
4121         }
4122
4123         /* set a block size */
4124         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4125                 f2fs_err(sbi, "unable to set blocksize");
4126                 goto free_sbi;
4127         }
4128
4129         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4130                                                                 &recovery);
4131         if (err)
4132                 goto free_sbi;
4133
4134         sb->s_fs_info = sbi;
4135         sbi->raw_super = raw_super;
4136
4137         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4138
4139         /* precompute checksum seed for metadata */
4140         if (f2fs_sb_has_inode_chksum(sbi))
4141                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4142                                                 sizeof(raw_super->uuid));
4143
4144         default_options(sbi);
4145         /* parse mount options */
4146         options = kstrdup((const char *)data, GFP_KERNEL);
4147         if (data && !options) {
4148                 err = -ENOMEM;
4149                 goto free_sb_buf;
4150         }
4151
4152         err = parse_options(sb, options, false);
4153         if (err)
4154                 goto free_options;
4155
4156         sb->s_maxbytes = max_file_blocks(NULL) <<
4157                                 le32_to_cpu(raw_super->log_blocksize);
4158         sb->s_max_links = F2FS_LINK_MAX;
4159
4160         err = f2fs_setup_casefold(sbi);
4161         if (err)
4162                 goto free_options;
4163
4164 #ifdef CONFIG_QUOTA
4165         sb->dq_op = &f2fs_quota_operations;
4166         sb->s_qcop = &f2fs_quotactl_ops;
4167         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4168
4169         if (f2fs_sb_has_quota_ino(sbi)) {
4170                 for (i = 0; i < MAXQUOTAS; i++) {
4171                         if (f2fs_qf_ino(sbi->sb, i))
4172                                 sbi->nquota_files++;
4173                 }
4174         }
4175 #endif
4176
4177         sb->s_op = &f2fs_sops;
4178 #ifdef CONFIG_FS_ENCRYPTION
4179         sb->s_cop = &f2fs_cryptops;
4180 #endif
4181 #ifdef CONFIG_FS_VERITY
4182         sb->s_vop = &f2fs_verityops;
4183 #endif
4184         sb->s_xattr = f2fs_xattr_handlers;
4185         sb->s_export_op = &f2fs_export_ops;
4186         sb->s_magic = F2FS_SUPER_MAGIC;
4187         sb->s_time_gran = 1;
4188         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4189                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4190         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4191         sb->s_iflags |= SB_I_CGROUPWB;
4192
4193         /* init f2fs-specific super block info */
4194         sbi->valid_super_block = valid_super_block;
4195
4196         /* disallow all the data/node/meta page writes */
4197         set_sbi_flag(sbi, SBI_POR_DOING);
4198
4199         err = f2fs_init_write_merge_io(sbi);
4200         if (err)
4201                 goto free_bio_info;
4202
4203         init_sb_info(sbi);
4204
4205         err = f2fs_init_iostat(sbi);
4206         if (err)
4207                 goto free_bio_info;
4208
4209         err = init_percpu_info(sbi);
4210         if (err)
4211                 goto free_iostat;
4212
4213         if (F2FS_IO_ALIGNED(sbi)) {
4214                 sbi->write_io_dummy =
4215                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4216                 if (!sbi->write_io_dummy) {
4217                         err = -ENOMEM;
4218                         goto free_percpu;
4219                 }
4220         }
4221
4222         /* init per sbi slab cache */
4223         err = f2fs_init_xattr_caches(sbi);
4224         if (err)
4225                 goto free_io_dummy;
4226         err = f2fs_init_page_array_cache(sbi);
4227         if (err)
4228                 goto free_xattr_cache;
4229
4230         /* get an inode for meta space */
4231         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4232         if (IS_ERR(sbi->meta_inode)) {
4233                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4234                 err = PTR_ERR(sbi->meta_inode);
4235                 goto free_page_array_cache;
4236         }
4237
4238         err = f2fs_get_valid_checkpoint(sbi);
4239         if (err) {
4240                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4241                 goto free_meta_inode;
4242         }
4243
4244         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4245                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4246         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4247                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4248                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4249         }
4250
4251         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4252                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4253
4254         /* Initialize device list */
4255         err = f2fs_scan_devices(sbi);
4256         if (err) {
4257                 f2fs_err(sbi, "Failed to find devices");
4258                 goto free_devices;
4259         }
4260
4261         err = f2fs_init_post_read_wq(sbi);
4262         if (err) {
4263                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4264                 goto free_devices;
4265         }
4266
4267         sbi->total_valid_node_count =
4268                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4269         percpu_counter_set(&sbi->total_valid_inode_count,
4270                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4271         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4272         sbi->total_valid_block_count =
4273                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4274         sbi->last_valid_block_count = sbi->total_valid_block_count;
4275         sbi->reserved_blocks = 0;
4276         sbi->current_reserved_blocks = 0;
4277         limit_reserve_root(sbi);
4278         adjust_unusable_cap_perc(sbi);
4279
4280         f2fs_init_extent_cache_info(sbi);
4281
4282         f2fs_init_ino_entry_info(sbi);
4283
4284         f2fs_init_fsync_node_info(sbi);
4285
4286         /* setup checkpoint request control and start checkpoint issue thread */
4287         f2fs_init_ckpt_req_control(sbi);
4288         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4289                         test_opt(sbi, MERGE_CHECKPOINT)) {
4290                 err = f2fs_start_ckpt_thread(sbi);
4291                 if (err) {
4292                         f2fs_err(sbi,
4293                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4294                             err);
4295                         goto stop_ckpt_thread;
4296                 }
4297         }
4298
4299         /* setup f2fs internal modules */
4300         err = f2fs_build_segment_manager(sbi);
4301         if (err) {
4302                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4303                          err);
4304                 goto free_sm;
4305         }
4306         err = f2fs_build_node_manager(sbi);
4307         if (err) {
4308                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4309                          err);
4310                 goto free_nm;
4311         }
4312
4313         err = adjust_reserved_segment(sbi);
4314         if (err)
4315                 goto free_nm;
4316
4317         /* For write statistics */
4318         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4319
4320         /* Read accumulated write IO statistics if exists */
4321         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4322         if (__exist_node_summaries(sbi))
4323                 sbi->kbytes_written =
4324                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4325
4326         f2fs_build_gc_manager(sbi);
4327
4328         err = f2fs_build_stats(sbi);
4329         if (err)
4330                 goto free_nm;
4331
4332         /* get an inode for node space */
4333         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4334         if (IS_ERR(sbi->node_inode)) {
4335                 f2fs_err(sbi, "Failed to read node inode");
4336                 err = PTR_ERR(sbi->node_inode);
4337                 goto free_stats;
4338         }
4339
4340         /* read root inode and dentry */
4341         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4342         if (IS_ERR(root)) {
4343                 f2fs_err(sbi, "Failed to read root inode");
4344                 err = PTR_ERR(root);
4345                 goto free_node_inode;
4346         }
4347         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4348                         !root->i_size || !root->i_nlink) {
4349                 iput(root);
4350                 err = -EINVAL;
4351                 goto free_node_inode;
4352         }
4353
4354         sb->s_root = d_make_root(root); /* allocate root dentry */
4355         if (!sb->s_root) {
4356                 err = -ENOMEM;
4357                 goto free_node_inode;
4358         }
4359
4360         err = f2fs_init_compress_inode(sbi);
4361         if (err)
4362                 goto free_root_inode;
4363
4364         err = f2fs_register_sysfs(sbi);
4365         if (err)
4366                 goto free_compress_inode;
4367
4368 #ifdef CONFIG_QUOTA
4369         /* Enable quota usage during mount */
4370         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4371                 err = f2fs_enable_quotas(sb);
4372                 if (err)
4373                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4374         }
4375 #endif
4376         /* if there are any orphan inodes, free them */
4377         err = f2fs_recover_orphan_inodes(sbi);
4378         if (err)
4379                 goto free_meta;
4380
4381         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4382                 goto reset_checkpoint;
4383
4384         /* recover fsynced data */
4385         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4386                         !test_opt(sbi, NORECOVERY)) {
4387                 /*
4388                  * mount should be failed, when device has readonly mode, and
4389                  * previous checkpoint was not done by clean system shutdown.
4390                  */
4391                 if (f2fs_hw_is_readonly(sbi)) {
4392                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4393                                 err = f2fs_recover_fsync_data(sbi, true);
4394                                 if (err > 0) {
4395                                         err = -EROFS;
4396                                         f2fs_err(sbi, "Need to recover fsync data, but "
4397                                                 "write access unavailable, please try "
4398                                                 "mount w/ disable_roll_forward or norecovery");
4399                                 }
4400                                 if (err < 0)
4401                                         goto free_meta;
4402                         }
4403                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4404                         goto reset_checkpoint;
4405                 }
4406
4407                 if (need_fsck)
4408                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4409
4410                 if (skip_recovery)
4411                         goto reset_checkpoint;
4412
4413                 err = f2fs_recover_fsync_data(sbi, false);
4414                 if (err < 0) {
4415                         if (err != -ENOMEM)
4416                                 skip_recovery = true;
4417                         need_fsck = true;
4418                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4419                                  err);
4420                         goto free_meta;
4421                 }
4422         } else {
4423                 err = f2fs_recover_fsync_data(sbi, true);
4424
4425                 if (!f2fs_readonly(sb) && err > 0) {
4426                         err = -EINVAL;
4427                         f2fs_err(sbi, "Need to recover fsync data");
4428                         goto free_meta;
4429                 }
4430         }
4431
4432         /*
4433          * If the f2fs is not readonly and fsync data recovery succeeds,
4434          * check zoned block devices' write pointer consistency.
4435          */
4436         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4437                 err = f2fs_check_write_pointer(sbi);
4438                 if (err)
4439                         goto free_meta;
4440         }
4441
4442 reset_checkpoint:
4443         f2fs_init_inmem_curseg(sbi);
4444
4445         /* f2fs_recover_fsync_data() cleared this already */
4446         clear_sbi_flag(sbi, SBI_POR_DOING);
4447
4448         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4449                 err = f2fs_disable_checkpoint(sbi);
4450                 if (err)
4451                         goto sync_free_meta;
4452         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4453                 f2fs_enable_checkpoint(sbi);
4454         }
4455
4456         /*
4457          * If filesystem is not mounted as read-only then
4458          * do start the gc_thread.
4459          */
4460         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4461                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4462                 /* After POR, we can run background GC thread.*/
4463                 err = f2fs_start_gc_thread(sbi);
4464                 if (err)
4465                         goto sync_free_meta;
4466         }
4467         kvfree(options);
4468
4469         /* recover broken superblock */
4470         if (recovery) {
4471                 err = f2fs_commit_super(sbi, true);
4472                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4473                           sbi->valid_super_block ? 1 : 2, err);
4474         }
4475
4476         f2fs_join_shrinker(sbi);
4477
4478         f2fs_tuning_parameters(sbi);
4479
4480         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4481                     cur_cp_version(F2FS_CKPT(sbi)));
4482         f2fs_update_time(sbi, CP_TIME);
4483         f2fs_update_time(sbi, REQ_TIME);
4484         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4485         return 0;
4486
4487 sync_free_meta:
4488         /* safe to flush all the data */
4489         sync_filesystem(sbi->sb);
4490         retry_cnt = 0;
4491
4492 free_meta:
4493 #ifdef CONFIG_QUOTA
4494         f2fs_truncate_quota_inode_pages(sb);
4495         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4496                 f2fs_quota_off_umount(sbi->sb);
4497 #endif
4498         /*
4499          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4500          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4501          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4502          * falls into an infinite loop in f2fs_sync_meta_pages().
4503          */
4504         truncate_inode_pages_final(META_MAPPING(sbi));
4505         /* evict some inodes being cached by GC */
4506         evict_inodes(sb);
4507         f2fs_unregister_sysfs(sbi);
4508 free_compress_inode:
4509         f2fs_destroy_compress_inode(sbi);
4510 free_root_inode:
4511         dput(sb->s_root);
4512         sb->s_root = NULL;
4513 free_node_inode:
4514         f2fs_release_ino_entry(sbi, true);
4515         truncate_inode_pages_final(NODE_MAPPING(sbi));
4516         iput(sbi->node_inode);
4517         sbi->node_inode = NULL;
4518 free_stats:
4519         f2fs_destroy_stats(sbi);
4520 free_nm:
4521         /* stop discard thread before destroying node manager */
4522         f2fs_stop_discard_thread(sbi);
4523         f2fs_destroy_node_manager(sbi);
4524 free_sm:
4525         f2fs_destroy_segment_manager(sbi);
4526 stop_ckpt_thread:
4527         f2fs_stop_ckpt_thread(sbi);
4528         f2fs_destroy_post_read_wq(sbi);
4529 free_devices:
4530         destroy_device_list(sbi);
4531         kvfree(sbi->ckpt);
4532 free_meta_inode:
4533         make_bad_inode(sbi->meta_inode);
4534         iput(sbi->meta_inode);
4535         sbi->meta_inode = NULL;
4536 free_page_array_cache:
4537         f2fs_destroy_page_array_cache(sbi);
4538 free_xattr_cache:
4539         f2fs_destroy_xattr_caches(sbi);
4540 free_io_dummy:
4541         mempool_destroy(sbi->write_io_dummy);
4542 free_percpu:
4543         destroy_percpu_info(sbi);
4544 free_iostat:
4545         f2fs_destroy_iostat(sbi);
4546 free_bio_info:
4547         for (i = 0; i < NR_PAGE_TYPE; i++)
4548                 kvfree(sbi->write_io[i]);
4549
4550 #if IS_ENABLED(CONFIG_UNICODE)
4551         utf8_unload(sb->s_encoding);
4552         sb->s_encoding = NULL;
4553 #endif
4554 free_options:
4555 #ifdef CONFIG_QUOTA
4556         for (i = 0; i < MAXQUOTAS; i++)
4557                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4558 #endif
4559         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4560         kvfree(options);
4561 free_sb_buf:
4562         kfree(raw_super);
4563 free_sbi:
4564         if (sbi->s_chksum_driver)
4565                 crypto_free_shash(sbi->s_chksum_driver);
4566         kfree(sbi);
4567
4568         /* give only one another chance */
4569         if (retry_cnt > 0 && skip_recovery) {
4570                 retry_cnt--;
4571                 shrink_dcache_sb(sb);
4572                 goto try_onemore;
4573         }
4574         return err;
4575 }
4576
4577 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4578                         const char *dev_name, void *data)
4579 {
4580         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4581 }
4582
4583 static void kill_f2fs_super(struct super_block *sb)
4584 {
4585         if (sb->s_root) {
4586                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4587
4588                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4589                 f2fs_stop_gc_thread(sbi);
4590                 f2fs_stop_discard_thread(sbi);
4591
4592 #ifdef CONFIG_F2FS_FS_COMPRESSION
4593                 /*
4594                  * latter evict_inode() can bypass checking and invalidating
4595                  * compress inode cache.
4596                  */
4597                 if (test_opt(sbi, COMPRESS_CACHE))
4598                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4599 #endif
4600
4601                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4602                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4603                         struct cp_control cpc = {
4604                                 .reason = CP_UMOUNT,
4605                         };
4606                         f2fs_write_checkpoint(sbi, &cpc);
4607                 }
4608
4609                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4610                         sb->s_flags &= ~SB_RDONLY;
4611         }
4612         kill_block_super(sb);
4613 }
4614
4615 static struct file_system_type f2fs_fs_type = {
4616         .owner          = THIS_MODULE,
4617         .name           = "f2fs",
4618         .mount          = f2fs_mount,
4619         .kill_sb        = kill_f2fs_super,
4620         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4621 };
4622 MODULE_ALIAS_FS("f2fs");
4623
4624 static int __init init_inodecache(void)
4625 {
4626         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4627                         sizeof(struct f2fs_inode_info), 0,
4628                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4629         if (!f2fs_inode_cachep)
4630                 return -ENOMEM;
4631         return 0;
4632 }
4633
4634 static void destroy_inodecache(void)
4635 {
4636         /*
4637          * Make sure all delayed rcu free inodes are flushed before we
4638          * destroy cache.
4639          */
4640         rcu_barrier();
4641         kmem_cache_destroy(f2fs_inode_cachep);
4642 }
4643
4644 static int __init init_f2fs_fs(void)
4645 {
4646         int err;
4647
4648         if (PAGE_SIZE != F2FS_BLKSIZE) {
4649                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4650                                 PAGE_SIZE, F2FS_BLKSIZE);
4651                 return -EINVAL;
4652         }
4653
4654         err = init_inodecache();
4655         if (err)
4656                 goto fail;
4657         err = f2fs_create_node_manager_caches();
4658         if (err)
4659                 goto free_inodecache;
4660         err = f2fs_create_segment_manager_caches();
4661         if (err)
4662                 goto free_node_manager_caches;
4663         err = f2fs_create_checkpoint_caches();
4664         if (err)
4665                 goto free_segment_manager_caches;
4666         err = f2fs_create_recovery_cache();
4667         if (err)
4668                 goto free_checkpoint_caches;
4669         err = f2fs_create_extent_cache();
4670         if (err)
4671                 goto free_recovery_cache;
4672         err = f2fs_create_garbage_collection_cache();
4673         if (err)
4674                 goto free_extent_cache;
4675         err = f2fs_init_sysfs();
4676         if (err)
4677                 goto free_garbage_collection_cache;
4678         err = register_shrinker(&f2fs_shrinker_info, "f2fs-shrinker");
4679         if (err)
4680                 goto free_sysfs;
4681         err = register_filesystem(&f2fs_fs_type);
4682         if (err)
4683                 goto free_shrinker;
4684         f2fs_create_root_stats();
4685         err = f2fs_init_post_read_processing();
4686         if (err)
4687                 goto free_root_stats;
4688         err = f2fs_init_iostat_processing();
4689         if (err)
4690                 goto free_post_read;
4691         err = f2fs_init_bio_entry_cache();
4692         if (err)
4693                 goto free_iostat;
4694         err = f2fs_init_bioset();
4695         if (err)
4696                 goto free_bio_enrty_cache;
4697         err = f2fs_init_compress_mempool();
4698         if (err)
4699                 goto free_bioset;
4700         err = f2fs_init_compress_cache();
4701         if (err)
4702                 goto free_compress_mempool;
4703         err = f2fs_create_casefold_cache();
4704         if (err)
4705                 goto free_compress_cache;
4706         return 0;
4707 free_compress_cache:
4708         f2fs_destroy_compress_cache();
4709 free_compress_mempool:
4710         f2fs_destroy_compress_mempool();
4711 free_bioset:
4712         f2fs_destroy_bioset();
4713 free_bio_enrty_cache:
4714         f2fs_destroy_bio_entry_cache();
4715 free_iostat:
4716         f2fs_destroy_iostat_processing();
4717 free_post_read:
4718         f2fs_destroy_post_read_processing();
4719 free_root_stats:
4720         f2fs_destroy_root_stats();
4721         unregister_filesystem(&f2fs_fs_type);
4722 free_shrinker:
4723         unregister_shrinker(&f2fs_shrinker_info);
4724 free_sysfs:
4725         f2fs_exit_sysfs();
4726 free_garbage_collection_cache:
4727         f2fs_destroy_garbage_collection_cache();
4728 free_extent_cache:
4729         f2fs_destroy_extent_cache();
4730 free_recovery_cache:
4731         f2fs_destroy_recovery_cache();
4732 free_checkpoint_caches:
4733         f2fs_destroy_checkpoint_caches();
4734 free_segment_manager_caches:
4735         f2fs_destroy_segment_manager_caches();
4736 free_node_manager_caches:
4737         f2fs_destroy_node_manager_caches();
4738 free_inodecache:
4739         destroy_inodecache();
4740 fail:
4741         return err;
4742 }
4743
4744 static void __exit exit_f2fs_fs(void)
4745 {
4746         f2fs_destroy_casefold_cache();
4747         f2fs_destroy_compress_cache();
4748         f2fs_destroy_compress_mempool();
4749         f2fs_destroy_bioset();
4750         f2fs_destroy_bio_entry_cache();
4751         f2fs_destroy_iostat_processing();
4752         f2fs_destroy_post_read_processing();
4753         f2fs_destroy_root_stats();
4754         unregister_filesystem(&f2fs_fs_type);
4755         unregister_shrinker(&f2fs_shrinker_info);
4756         f2fs_exit_sysfs();
4757         f2fs_destroy_garbage_collection_cache();
4758         f2fs_destroy_extent_cache();
4759         f2fs_destroy_recovery_cache();
4760         f2fs_destroy_checkpoint_caches();
4761         f2fs_destroy_segment_manager_caches();
4762         f2fs_destroy_node_manager_caches();
4763         destroy_inodecache();
4764 }
4765
4766 module_init(init_f2fs_fs)
4767 module_exit(exit_f2fs_fs)
4768
4769 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4770 MODULE_DESCRIPTION("Flash Friendly File System");
4771 MODULE_LICENSE("GPL");
4772 MODULE_SOFTDEP("pre: crc32");
4773