fs/f2fs/super.c

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