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
  29 #include "f2fs.h"
  30 #include "node.h"
  31 #include "segment.h"
  32 #include "xattr.h"
  33 #include "gc.h"
  34 #include "trace.h"
  35
  36 #define CREATE_TRACE_POINTS
  37 #include <trace/events/f2fs.h>
  38
  39 static struct kmem_cache *f2fs_inode_cachep;
  40
  41 #ifdef CONFIG_F2FS_FAULT_INJECTION
  42
  43 const char *f2fs_fault_name[FAULT_MAX] = {
  44         [FAULT_KMALLOC]         = "kmalloc",
  45         [FAULT_KVMALLOC]        = "kvmalloc",
  46         [FAULT_PAGE_ALLOC]      = "page alloc",
  47         [FAULT_PAGE_GET]        = "page get",
  48         [FAULT_ALLOC_BIO]       = "alloc bio",
  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_compress_algorithm,
 147         Opt_compress_log_size,
 148         Opt_compress_extension,
 149         Opt_atgc,
 150         Opt_err,
 151 };
 152
 153 static match_table_t f2fs_tokens = {
 154         {Opt_gc_background, "background_gc=%s"},
 155         {Opt_disable_roll_forward, "disable_roll_forward"},
 156         {Opt_norecovery, "norecovery"},
 157         {Opt_discard, "discard"},
 158         {Opt_nodiscard, "nodiscard"},
 159         {Opt_noheap, "no_heap"},
 160         {Opt_heap, "heap"},
 161         {Opt_user_xattr, "user_xattr"},
 162         {Opt_nouser_xattr, "nouser_xattr"},
 163         {Opt_acl, "acl"},
 164         {Opt_noacl, "noacl"},
 165         {Opt_active_logs, "active_logs=%u"},
 166         {Opt_disable_ext_identify, "disable_ext_identify"},
 167         {Opt_inline_xattr, "inline_xattr"},
 168         {Opt_noinline_xattr, "noinline_xattr"},
 169         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 170         {Opt_inline_data, "inline_data"},
 171         {Opt_inline_dentry, "inline_dentry"},
 172         {Opt_noinline_dentry, "noinline_dentry"},
 173         {Opt_flush_merge, "flush_merge"},
 174         {Opt_noflush_merge, "noflush_merge"},
 175         {Opt_nobarrier, "nobarrier"},
 176         {Opt_fastboot, "fastboot"},
 177         {Opt_extent_cache, "extent_cache"},
 178         {Opt_noextent_cache, "noextent_cache"},
 179         {Opt_noinline_data, "noinline_data"},
 180         {Opt_data_flush, "data_flush"},
 181         {Opt_reserve_root, "reserve_root=%u"},
 182         {Opt_resgid, "resgid=%u"},
 183         {Opt_resuid, "resuid=%u"},
 184         {Opt_mode, "mode=%s"},
 185         {Opt_io_size_bits, "io_bits=%u"},
 186         {Opt_fault_injection, "fault_injection=%u"},
 187         {Opt_fault_type, "fault_type=%u"},
 188         {Opt_lazytime, "lazytime"},
 189         {Opt_nolazytime, "nolazytime"},
 190         {Opt_quota, "quota"},
 191         {Opt_noquota, "noquota"},
 192         {Opt_usrquota, "usrquota"},
 193         {Opt_grpquota, "grpquota"},
 194         {Opt_prjquota, "prjquota"},
 195         {Opt_usrjquota, "usrjquota=%s"},
 196         {Opt_grpjquota, "grpjquota=%s"},
 197         {Opt_prjjquota, "prjjquota=%s"},
 198         {Opt_offusrjquota, "usrjquota="},
 199         {Opt_offgrpjquota, "grpjquota="},
 200         {Opt_offprjjquota, "prjjquota="},
 201         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 202         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 203         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 204         {Opt_whint, "whint_mode=%s"},
 205         {Opt_alloc, "alloc_mode=%s"},
 206         {Opt_fsync, "fsync_mode=%s"},
 207         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 208         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 209         {Opt_inlinecrypt, "inlinecrypt"},
 210         {Opt_checkpoint_disable, "checkpoint=disable"},
 211         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 212         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 213         {Opt_checkpoint_enable, "checkpoint=enable"},
 214         {Opt_compress_algorithm, "compress_algorithm=%s"},
 215         {Opt_compress_log_size, "compress_log_size=%u"},
 216         {Opt_compress_extension, "compress_extension=%s"},
 217         {Opt_atgc, "atgc"},
 218         {Opt_err, NULL},
 219 };
 220
 221 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 222 {
 223         struct va_format vaf;
 224         va_list args;
 225         int level;
 226
 227         va_start(args, fmt);
 228
 229         level = printk_get_level(fmt);
 230         vaf.fmt = printk_skip_level(fmt);
 231         vaf.va = &args;
 232         printk("%c%cF2FS-fs (%s): %pV\n",
 233                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 234
 235         va_end(args);
 236 }
 237
 238 #ifdef CONFIG_UNICODE
 239 static const struct f2fs_sb_encodings {
 240         __u16 magic;
 241         char *name;
 242         char *version;
 243 } f2fs_sb_encoding_map[] = {
 244         {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
 245 };
 246
 247 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
 248                                  const struct f2fs_sb_encodings **encoding,
 249                                  __u16 *flags)
 250 {
 251         __u16 magic = le16_to_cpu(sb->s_encoding);
 252         int i;
 253
 254         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 255                 if (magic == f2fs_sb_encoding_map[i].magic)
 256                         break;
 257
 258         if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
 259                 return -EINVAL;
 260
 261         *encoding = &f2fs_sb_encoding_map[i];
 262         *flags = le16_to_cpu(sb->s_encoding_flags);
 263
 264         return 0;
 265 }
 266 #endif
 267
 268 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 269 {
 270         block_t limit = min((sbi->user_block_count >> 3),
 271                         sbi->user_block_count - sbi->reserved_blocks);
 272
 273         /* limit is 12.5% */
 274         if (test_opt(sbi, RESERVE_ROOT) &&
 275                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 276                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 277                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 278                           F2FS_OPTION(sbi).root_reserved_blocks);
 279         }
 280         if (!test_opt(sbi, RESERVE_ROOT) &&
 281                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 282                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 283                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 284                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 285                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 286                           from_kuid_munged(&init_user_ns,
 287                                            F2FS_OPTION(sbi).s_resuid),
 288                           from_kgid_munged(&init_user_ns,
 289                                            F2FS_OPTION(sbi).s_resgid));
 290 }
 291
 292 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 293 {
 294         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 295         unsigned int avg_vblocks;
 296         unsigned int wanted_reserved_segments;
 297         block_t avail_user_block_count;
 298
 299         if (!F2FS_IO_ALIGNED(sbi))
 300                 return 0;
 301
 302         /* average valid block count in section in worst case */
 303         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 304
 305         /*
 306          * we need enough free space when migrating one section in worst case
 307          */
 308         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 309                                                 reserved_segments(sbi);
 310         wanted_reserved_segments -= reserved_segments(sbi);
 311
 312         avail_user_block_count = sbi->user_block_count -
 313                                 sbi->current_reserved_blocks -
 314                                 F2FS_OPTION(sbi).root_reserved_blocks;
 315
 316         if (wanted_reserved_segments * sbi->blocks_per_seg >
 317                                         avail_user_block_count) {
 318                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 319                         wanted_reserved_segments,
 320                         avail_user_block_count >> sbi->log_blocks_per_seg);
 321                 return -ENOSPC;
 322         }
 323
 324         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 325
 326         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 327                          wanted_reserved_segments);
 328
 329         return 0;
 330 }
 331
 332 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 333 {
 334         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 335                 return;
 336
 337         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 338                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 339         else
 340                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 341                                         F2FS_OPTION(sbi).unusable_cap_perc;
 342
 343         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 344                         F2FS_OPTION(sbi).unusable_cap,
 345                         F2FS_OPTION(sbi).unusable_cap_perc);
 346 }
 347
 348 static void init_once(void *foo)
 349 {
 350         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 351
 352         inode_init_once(&fi->vfs_inode);
 353 }
 354
 355 #ifdef CONFIG_QUOTA
 356 static const char * const quotatypes[] = INITQFNAMES;
 357 #define QTYPE2NAME(t) (quotatypes[t])
 358 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 359                                                         substring_t *args)
 360 {
 361         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 362         char *qname;
 363         int ret = -EINVAL;
 364
 365         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 366                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 367                 return -EINVAL;
 368         }
 369         if (f2fs_sb_has_quota_ino(sbi)) {
 370                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 371                 return 0;
 372         }
 373
 374         qname = match_strdup(args);
 375         if (!qname) {
 376                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 377                 return -ENOMEM;
 378         }
 379         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 380                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 381                         ret = 0;
 382                 else
 383                         f2fs_err(sbi, "%s quota file already specified",
 384                                  QTYPE2NAME(qtype));
 385                 goto errout;
 386         }
 387         if (strchr(qname, '/')) {
 388                 f2fs_err(sbi, "quotafile must be on filesystem root");
 389                 goto errout;
 390         }
 391         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 392         set_opt(sbi, QUOTA);
 393         return 0;
 394 errout:
 395         kfree(qname);
 396         return ret;
 397 }
 398
 399 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 400 {
 401         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 402
 403         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 404                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 405                 return -EINVAL;
 406         }
 407         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 408         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 409         return 0;
 410 }
 411
 412 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 413 {
 414         /*
 415          * We do the test below only for project quotas. 'usrquota' and
 416          * 'grpquota' mount options are allowed even without quota feature
 417          * to support legacy quotas in quota files.
 418          */
 419         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 420                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 421                 return -1;
 422         }
 423         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 424                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 425                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 426                 if (test_opt(sbi, USRQUOTA) &&
 427                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 428                         clear_opt(sbi, USRQUOTA);
 429
 430                 if (test_opt(sbi, GRPQUOTA) &&
 431                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 432                         clear_opt(sbi, GRPQUOTA);
 433
 434                 if (test_opt(sbi, PRJQUOTA) &&
 435                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 436                         clear_opt(sbi, PRJQUOTA);
 437
 438                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 439                                 test_opt(sbi, PRJQUOTA)) {
 440                         f2fs_err(sbi, "old and new quota format mixing");
 441                         return -1;
 442                 }
 443
 444                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 445                         f2fs_err(sbi, "journaled quota format not specified");
 446                         return -1;
 447                 }
 448         }
 449
 450         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 451                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 452                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 453         }
 454         return 0;
 455 }
 456 #endif
 457
 458 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 459                                           const char *opt,
 460                                           const substring_t *arg,
 461                                           bool is_remount)
 462 {
 463         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 464 #ifdef CONFIG_FS_ENCRYPTION
 465         int err;
 466
 467         if (!f2fs_sb_has_encrypt(sbi)) {
 468                 f2fs_err(sbi, "Encrypt feature is off");
 469                 return -EINVAL;
 470         }
 471
 472         /*
 473          * This mount option is just for testing, and it's not worthwhile to
 474          * implement the extra complexity (e.g. RCU protection) that would be
 475          * needed to allow it to be set or changed during remount.  We do allow
 476          * it to be specified during remount, but only if there is no change.
 477          */
 478         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 479                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 480                 return -EINVAL;
 481         }
 482         err = fscrypt_set_test_dummy_encryption(
 483                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 484         if (err) {
 485                 if (err == -EEXIST)
 486                         f2fs_warn(sbi,
 487                                   "Can't change test_dummy_encryption on remount");
 488                 else if (err == -EINVAL)
 489                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 490                                   opt);
 491                 else
 492                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 493                                   opt, err);
 494                 return -EINVAL;
 495         }
 496         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 497 #else
 498         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 499 #endif
 500         return 0;
 501 }
 502
 503 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 504 {
 505         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 506         substring_t args[MAX_OPT_ARGS];
 507 #ifdef CONFIG_F2FS_FS_COMPRESSION
 508         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 509         int ext_cnt;
 510 #endif
 511         char *p, *name;
 512         int arg = 0;
 513         kuid_t uid;
 514         kgid_t gid;
 515         int ret;
 516
 517         if (!options)
 518                 return 0;
 519
 520         while ((p = strsep(&options, ",")) != NULL) {
 521                 int token;
 522                 if (!*p)
 523                         continue;
 524                 /*
 525                  * Initialize args struct so we know whether arg was
 526                  * found; some options take optional arguments.
 527                  */
 528                 args[0].to = args[0].from = NULL;
 529                 token = match_token(p, f2fs_tokens, args);
 530
 531                 switch (token) {
 532                 case Opt_gc_background:
 533                         name = match_strdup(&args[0]);
 534
 535                         if (!name)
 536                                 return -ENOMEM;
 537                         if (!strcmp(name, "on")) {
 538                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 539                         } else if (!strcmp(name, "off")) {
 540                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 541                         } else if (!strcmp(name, "sync")) {
 542                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 543                         } else {
 544                                 kfree(name);
 545                                 return -EINVAL;
 546                         }
 547                         kfree(name);
 548                         break;
 549                 case Opt_disable_roll_forward:
 550                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 551                         break;
 552                 case Opt_norecovery:
 553                         /* this option mounts f2fs with ro */
 554                         set_opt(sbi, NORECOVERY);
 555                         if (!f2fs_readonly(sb))
 556                                 return -EINVAL;
 557                         break;
 558                 case Opt_discard:
 559                         set_opt(sbi, DISCARD);
 560                         break;
 561                 case Opt_nodiscard:
 562                         if (f2fs_sb_has_blkzoned(sbi)) {
 563                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 564                                 return -EINVAL;
 565                         }
 566                         clear_opt(sbi, DISCARD);
 567                         break;
 568                 case Opt_noheap:
 569                         set_opt(sbi, NOHEAP);
 570                         break;
 571                 case Opt_heap:
 572                         clear_opt(sbi, NOHEAP);
 573                         break;
 574 #ifdef CONFIG_F2FS_FS_XATTR
 575                 case Opt_user_xattr:
 576                         set_opt(sbi, XATTR_USER);
 577                         break;
 578                 case Opt_nouser_xattr:
 579                         clear_opt(sbi, XATTR_USER);
 580                         break;
 581                 case Opt_inline_xattr:
 582                         set_opt(sbi, INLINE_XATTR);
 583                         break;
 584                 case Opt_noinline_xattr:
 585                         clear_opt(sbi, INLINE_XATTR);
 586                         break;
 587                 case Opt_inline_xattr_size:
 588                         if (args->from && match_int(args, &arg))
 589                                 return -EINVAL;
 590                         set_opt(sbi, INLINE_XATTR_SIZE);
 591                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 592                         break;
 593 #else
 594                 case Opt_user_xattr:
 595                         f2fs_info(sbi, "user_xattr options not supported");
 596                         break;
 597                 case Opt_nouser_xattr:
 598                         f2fs_info(sbi, "nouser_xattr options not supported");
 599                         break;
 600                 case Opt_inline_xattr:
 601                         f2fs_info(sbi, "inline_xattr options not supported");
 602                         break;
 603                 case Opt_noinline_xattr:
 604                         f2fs_info(sbi, "noinline_xattr options not supported");
 605                         break;
 606 #endif
 607 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 608                 case Opt_acl:
 609                         set_opt(sbi, POSIX_ACL);
 610                         break;
 611                 case Opt_noacl:
 612                         clear_opt(sbi, POSIX_ACL);
 613                         break;
 614 #else
 615                 case Opt_acl:
 616                         f2fs_info(sbi, "acl options not supported");
 617                         break;
 618                 case Opt_noacl:
 619                         f2fs_info(sbi, "noacl options not supported");
 620                         break;
 621 #endif
 622                 case Opt_active_logs:
 623                         if (args->from && match_int(args, &arg))
 624                                 return -EINVAL;
 625                         if (arg != 2 && arg != 4 &&
 626                                 arg != NR_CURSEG_PERSIST_TYPE)
 627                                 return -EINVAL;
 628                         F2FS_OPTION(sbi).active_logs = arg;
 629                         break;
 630                 case Opt_disable_ext_identify:
 631                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 632                         break;
 633                 case Opt_inline_data:
 634                         set_opt(sbi, INLINE_DATA);
 635                         break;
 636                 case Opt_inline_dentry:
 637                         set_opt(sbi, INLINE_DENTRY);
 638                         break;
 639                 case Opt_noinline_dentry:
 640                         clear_opt(sbi, INLINE_DENTRY);
 641                         break;
 642                 case Opt_flush_merge:
 643                         set_opt(sbi, FLUSH_MERGE);
 644                         break;
 645                 case Opt_noflush_merge:
 646                         clear_opt(sbi, FLUSH_MERGE);
 647                         break;
 648                 case Opt_nobarrier:
 649                         set_opt(sbi, NOBARRIER);
 650                         break;
 651                 case Opt_fastboot:
 652                         set_opt(sbi, FASTBOOT);
 653                         break;
 654                 case Opt_extent_cache:
 655                         set_opt(sbi, EXTENT_CACHE);
 656                         break;
 657                 case Opt_noextent_cache:
 658                         clear_opt(sbi, EXTENT_CACHE);
 659                         break;
 660                 case Opt_noinline_data:
 661                         clear_opt(sbi, INLINE_DATA);
 662                         break;
 663                 case Opt_data_flush:
 664                         set_opt(sbi, DATA_FLUSH);
 665                         break;
 666                 case Opt_reserve_root:
 667                         if (args->from && match_int(args, &arg))
 668                                 return -EINVAL;
 669                         if (test_opt(sbi, RESERVE_ROOT)) {
 670                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 671                                           F2FS_OPTION(sbi).root_reserved_blocks);
 672                         } else {
 673                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 674                                 set_opt(sbi, RESERVE_ROOT);
 675                         }
 676                         break;
 677                 case Opt_resuid:
 678                         if (args->from && match_int(args, &arg))
 679                                 return -EINVAL;
 680                         uid = make_kuid(current_user_ns(), arg);
 681                         if (!uid_valid(uid)) {
 682                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 683                                 return -EINVAL;
 684                         }
 685                         F2FS_OPTION(sbi).s_resuid = uid;
 686                         break;
 687                 case Opt_resgid:
 688                         if (args->from && match_int(args, &arg))
 689                                 return -EINVAL;
 690                         gid = make_kgid(current_user_ns(), arg);
 691                         if (!gid_valid(gid)) {
 692                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 693                                 return -EINVAL;
 694                         }
 695                         F2FS_OPTION(sbi).s_resgid = gid;
 696                         break;
 697                 case Opt_mode:
 698                         name = match_strdup(&args[0]);
 699
 700                         if (!name)
 701                                 return -ENOMEM;
 702                         if (!strcmp(name, "adaptive")) {
 703                                 if (f2fs_sb_has_blkzoned(sbi)) {
 704                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 705                                         kfree(name);
 706                                         return -EINVAL;
 707                                 }
 708                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 709                         } else if (!strcmp(name, "lfs")) {
 710                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 711                         } else {
 712                                 kfree(name);
 713                                 return -EINVAL;
 714                         }
 715                         kfree(name);
 716                         break;
 717                 case Opt_io_size_bits:
 718                         if (args->from && match_int(args, &arg))
 719                                 return -EINVAL;
 720                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
 721                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 722                                           1 << arg, BIO_MAX_PAGES);
 723                                 return -EINVAL;
 724                         }
 725                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 726                         break;
 727 #ifdef CONFIG_F2FS_FAULT_INJECTION
 728                 case Opt_fault_injection:
 729                         if (args->from && match_int(args, &arg))
 730                                 return -EINVAL;
 731                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 732                         set_opt(sbi, FAULT_INJECTION);
 733                         break;
 734
 735                 case Opt_fault_type:
 736                         if (args->from && match_int(args, &arg))
 737                                 return -EINVAL;
 738                         f2fs_build_fault_attr(sbi, 0, arg);
 739                         set_opt(sbi, FAULT_INJECTION);
 740                         break;
 741 #else
 742                 case Opt_fault_injection:
 743                         f2fs_info(sbi, "fault_injection options not supported");
 744                         break;
 745
 746                 case Opt_fault_type:
 747                         f2fs_info(sbi, "fault_type options not supported");
 748                         break;
 749 #endif
 750                 case Opt_lazytime:
 751                         sb->s_flags |= SB_LAZYTIME;
 752                         break;
 753                 case Opt_nolazytime:
 754                         sb->s_flags &= ~SB_LAZYTIME;
 755                         break;
 756 #ifdef CONFIG_QUOTA
 757                 case Opt_quota:
 758                 case Opt_usrquota:
 759                         set_opt(sbi, USRQUOTA);
 760                         break;
 761                 case Opt_grpquota:
 762                         set_opt(sbi, GRPQUOTA);
 763                         break;
 764                 case Opt_prjquota:
 765                         set_opt(sbi, PRJQUOTA);
 766                         break;
 767                 case Opt_usrjquota:
 768                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 769                         if (ret)
 770                                 return ret;
 771                         break;
 772                 case Opt_grpjquota:
 773                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 774                         if (ret)
 775                                 return ret;
 776                         break;
 777                 case Opt_prjjquota:
 778                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 779                         if (ret)
 780                                 return ret;
 781                         break;
 782                 case Opt_offusrjquota:
 783                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 784                         if (ret)
 785                                 return ret;
 786                         break;
 787                 case Opt_offgrpjquota:
 788                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 789                         if (ret)
 790                                 return ret;
 791                         break;
 792                 case Opt_offprjjquota:
 793                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 794                         if (ret)
 795                                 return ret;
 796                         break;
 797                 case Opt_jqfmt_vfsold:
 798                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 799                         break;
 800                 case Opt_jqfmt_vfsv0:
 801                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 802                         break;
 803                 case Opt_jqfmt_vfsv1:
 804                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 805                         break;
 806                 case Opt_noquota:
 807                         clear_opt(sbi, QUOTA);
 808                         clear_opt(sbi, USRQUOTA);
 809                         clear_opt(sbi, GRPQUOTA);
 810                         clear_opt(sbi, PRJQUOTA);
 811                         break;
 812 #else
 813                 case Opt_quota:
 814                 case Opt_usrquota:
 815                 case Opt_grpquota:
 816                 case Opt_prjquota:
 817                 case Opt_usrjquota:
 818                 case Opt_grpjquota:
 819                 case Opt_prjjquota:
 820                 case Opt_offusrjquota:
 821                 case Opt_offgrpjquota:
 822                 case Opt_offprjjquota:
 823                 case Opt_jqfmt_vfsold:
 824                 case Opt_jqfmt_vfsv0:
 825                 case Opt_jqfmt_vfsv1:
 826                 case Opt_noquota:
 827                         f2fs_info(sbi, "quota operations not supported");
 828                         break;
 829 #endif
 830                 case Opt_whint:
 831                         name = match_strdup(&args[0]);
 832                         if (!name)
 833                                 return -ENOMEM;
 834                         if (!strcmp(name, "user-based")) {
 835                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 836                         } else if (!strcmp(name, "off")) {
 837                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 838                         } else if (!strcmp(name, "fs-based")) {
 839                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 840                         } else {
 841                                 kfree(name);
 842                                 return -EINVAL;
 843                         }
 844                         kfree(name);
 845                         break;
 846                 case Opt_alloc:
 847                         name = match_strdup(&args[0]);
 848                         if (!name)
 849                                 return -ENOMEM;
 850
 851                         if (!strcmp(name, "default")) {
 852                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 853                         } else if (!strcmp(name, "reuse")) {
 854                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 855                         } else {
 856                                 kfree(name);
 857                                 return -EINVAL;
 858                         }
 859                         kfree(name);
 860                         break;
 861                 case Opt_fsync:
 862                         name = match_strdup(&args[0]);
 863                         if (!name)
 864                                 return -ENOMEM;
 865                         if (!strcmp(name, "posix")) {
 866                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 867                         } else if (!strcmp(name, "strict")) {
 868                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 869                         } else if (!strcmp(name, "nobarrier")) {
 870                                 F2FS_OPTION(sbi).fsync_mode =
 871                                                         FSYNC_MODE_NOBARRIER;
 872                         } else {
 873                                 kfree(name);
 874                                 return -EINVAL;
 875                         }
 876                         kfree(name);
 877                         break;
 878                 case Opt_test_dummy_encryption:
 879                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 880                                                              is_remount);
 881                         if (ret)
 882                                 return ret;
 883                         break;
 884                 case Opt_inlinecrypt:
 885 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
 886                         sb->s_flags |= SB_INLINECRYPT;
 887 #else
 888                         f2fs_info(sbi, "inline encryption not supported");
 889 #endif
 890                         break;
 891                 case Opt_checkpoint_disable_cap_perc:
 892                         if (args->from && match_int(args, &arg))
 893                                 return -EINVAL;
 894                         if (arg < 0 || arg > 100)
 895                                 return -EINVAL;
 896                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
 897                         set_opt(sbi, DISABLE_CHECKPOINT);
 898                         break;
 899                 case Opt_checkpoint_disable_cap:
 900                         if (args->from && match_int(args, &arg))
 901                                 return -EINVAL;
 902                         F2FS_OPTION(sbi).unusable_cap = arg;
 903                         set_opt(sbi, DISABLE_CHECKPOINT);
 904                         break;
 905                 case Opt_checkpoint_disable:
 906                         set_opt(sbi, DISABLE_CHECKPOINT);
 907                         break;
 908                 case Opt_checkpoint_enable:
 909                         clear_opt(sbi, DISABLE_CHECKPOINT);
 910                         break;
 911 #ifdef CONFIG_F2FS_FS_COMPRESSION
 912                 case Opt_compress_algorithm:
 913                         if (!f2fs_sb_has_compression(sbi)) {
 914                                 f2fs_info(sbi, "Image doesn't support compression");
 915                                 break;
 916                         }
 917                         name = match_strdup(&args[0]);
 918                         if (!name)
 919                                 return -ENOMEM;
 920                         if (!strcmp(name, "lzo")) {
 921                                 F2FS_OPTION(sbi).compress_algorithm =
 922                                                                 COMPRESS_LZO;
 923                         } else if (!strcmp(name, "lz4")) {
 924                                 F2FS_OPTION(sbi).compress_algorithm =
 925                                                                 COMPRESS_LZ4;
 926                         } else if (!strcmp(name, "zstd")) {
 927                                 F2FS_OPTION(sbi).compress_algorithm =
 928                                                                 COMPRESS_ZSTD;
 929                         } else if (!strcmp(name, "lzo-rle")) {
 930                                 F2FS_OPTION(sbi).compress_algorithm =
 931                                                                 COMPRESS_LZORLE;
 932                         } else {
 933                                 kfree(name);
 934                                 return -EINVAL;
 935                         }
 936                         kfree(name);
 937                         break;
 938                 case Opt_compress_log_size:
 939                         if (!f2fs_sb_has_compression(sbi)) {
 940                                 f2fs_info(sbi, "Image doesn't support compression");
 941                                 break;
 942                         }
 943                         if (args->from && match_int(args, &arg))
 944                                 return -EINVAL;
 945                         if (arg < MIN_COMPRESS_LOG_SIZE ||
 946                                 arg > MAX_COMPRESS_LOG_SIZE) {
 947                                 f2fs_err(sbi,
 948                                         "Compress cluster log size is out of range");
 949                                 return -EINVAL;
 950                         }
 951                         F2FS_OPTION(sbi).compress_log_size = arg;
 952                         break;
 953                 case Opt_compress_extension:
 954                         if (!f2fs_sb_has_compression(sbi)) {
 955                                 f2fs_info(sbi, "Image doesn't support compression");
 956                                 break;
 957                         }
 958                         name = match_strdup(&args[0]);
 959                         if (!name)
 960                                 return -ENOMEM;
 961
 962                         ext = F2FS_OPTION(sbi).extensions;
 963                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 964
 965                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
 966                                 ext_cnt >= COMPRESS_EXT_NUM) {
 967                                 f2fs_err(sbi,
 968                                         "invalid extension length/number");
 969                                 kfree(name);
 970                                 return -EINVAL;
 971                         }
 972
 973                         strcpy(ext[ext_cnt], name);
 974                         F2FS_OPTION(sbi).compress_ext_cnt++;
 975                         kfree(name);
 976                         break;
 977 #else
 978                 case Opt_compress_algorithm:
 979                 case Opt_compress_log_size:
 980                 case Opt_compress_extension:
 981                         f2fs_info(sbi, "compression options not supported");
 982                         break;
 983 #endif
 984                 case Opt_atgc:
 985                         set_opt(sbi, ATGC);
 986                         break;
 987                 default:
 988                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
 989                                  p);
 990                         return -EINVAL;
 991                 }
 992         }
 993 #ifdef CONFIG_QUOTA
 994         if (f2fs_check_quota_options(sbi))
 995                 return -EINVAL;
 996 #else
 997         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
 998                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 999                 return -EINVAL;
1000         }
1001         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1002                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1003                 return -EINVAL;
1004         }
1005 #endif
1006 #ifndef CONFIG_UNICODE
1007         if (f2fs_sb_has_casefold(sbi)) {
1008                 f2fs_err(sbi,
1009                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1010                 return -EINVAL;
1011         }
1012 #endif
1013         /*
1014          * The BLKZONED feature indicates that the drive was formatted with
1015          * zone alignment optimization. This is optional for host-aware
1016          * devices, but mandatory for host-managed zoned block devices.
1017          */
1018 #ifndef CONFIG_BLK_DEV_ZONED
1019         if (f2fs_sb_has_blkzoned(sbi)) {
1020                 f2fs_err(sbi, "Zoned block device support is not enabled");
1021                 return -EINVAL;
1022         }
1023 #endif
1024
1025         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1026                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1027                          F2FS_IO_SIZE_KB(sbi));
1028                 return -EINVAL;
1029         }
1030
1031         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1032                 int min_size, max_size;
1033
1034                 if (!f2fs_sb_has_extra_attr(sbi) ||
1035                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1036                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1037                         return -EINVAL;
1038                 }
1039                 if (!test_opt(sbi, INLINE_XATTR)) {
1040                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1041                         return -EINVAL;
1042                 }
1043
1044                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1045                 max_size = MAX_INLINE_XATTR_SIZE;
1046
1047                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1048                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1049                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1050                                  min_size, max_size);
1051                         return -EINVAL;
1052                 }
1053         }
1054
1055         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1056                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
1057                 return -EINVAL;
1058         }
1059
1060         /* Not pass down write hints if the number of active logs is lesser
1061          * than NR_CURSEG_PERSIST_TYPE.
1062          */
1063         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_PERSIST_TYPE)
1064                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1065         return 0;
1066 }
1067
1068 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1069 {
1070         struct f2fs_inode_info *fi;
1071
1072         fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
1073         if (!fi)
1074                 return NULL;
1075
1076         init_once((void *) fi);
1077
1078         /* Initialize f2fs-specific inode info */
1079         atomic_set(&fi->dirty_pages, 0);
1080         atomic_set(&fi->i_compr_blocks, 0);
1081         init_rwsem(&fi->i_sem);
1082         spin_lock_init(&fi->i_size_lock);
1083         INIT_LIST_HEAD(&fi->dirty_list);
1084         INIT_LIST_HEAD(&fi->gdirty_list);
1085         INIT_LIST_HEAD(&fi->inmem_ilist);
1086         INIT_LIST_HEAD(&fi->inmem_pages);
1087         mutex_init(&fi->inmem_lock);
1088         init_rwsem(&fi->i_gc_rwsem[READ]);
1089         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1090         init_rwsem(&fi->i_mmap_sem);
1091         init_rwsem(&fi->i_xattr_sem);
1092
1093         /* Will be used by directory only */
1094         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1095
1096         fi->ra_offset = -1;
1097
1098         return &fi->vfs_inode;
1099 }
1100
1101 static int f2fs_drop_inode(struct inode *inode)
1102 {
1103         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1104         int ret;
1105
1106         /*
1107          * during filesystem shutdown, if checkpoint is disabled,
1108          * drop useless meta/node dirty pages.
1109          */
1110         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1111                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1112                         inode->i_ino == F2FS_META_INO(sbi)) {
1113                         trace_f2fs_drop_inode(inode, 1);
1114                         return 1;
1115                 }
1116         }
1117
1118         /*
1119          * This is to avoid a deadlock condition like below.
1120          * writeback_single_inode(inode)
1121          *  - f2fs_write_data_page
1122          *    - f2fs_gc -> iput -> evict
1123          *       - inode_wait_for_writeback(inode)
1124          */
1125         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1126                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1127                         /* to avoid evict_inode call simultaneously */
1128                         atomic_inc(&inode->i_count);
1129                         spin_unlock(&inode->i_lock);
1130
1131                         /* some remained atomic pages should discarded */
1132                         if (f2fs_is_atomic_file(inode))
1133                                 f2fs_drop_inmem_pages(inode);
1134
1135                         /* should remain fi->extent_tree for writepage */
1136                         f2fs_destroy_extent_node(inode);
1137
1138                         sb_start_intwrite(inode->i_sb);
1139                         f2fs_i_size_write(inode, 0);
1140
1141                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1142                                         inode, NULL, 0, DATA);
1143                         truncate_inode_pages_final(inode->i_mapping);
1144
1145                         if (F2FS_HAS_BLOCKS(inode))
1146                                 f2fs_truncate(inode);
1147
1148                         sb_end_intwrite(inode->i_sb);
1149
1150                         spin_lock(&inode->i_lock);
1151                         atomic_dec(&inode->i_count);
1152                 }
1153                 trace_f2fs_drop_inode(inode, 0);
1154                 return 0;
1155         }
1156         ret = generic_drop_inode(inode);
1157         if (!ret)
1158                 ret = fscrypt_drop_inode(inode);
1159         trace_f2fs_drop_inode(inode, ret);
1160         return ret;
1161 }
1162
1163 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1164 {
1165         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1166         int ret = 0;
1167
1168         spin_lock(&sbi->inode_lock[DIRTY_META]);
1169         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1170                 ret = 1;
1171         } else {
1172                 set_inode_flag(inode, FI_DIRTY_INODE);
1173                 stat_inc_dirty_inode(sbi, DIRTY_META);
1174         }
1175         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1176                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1177                                 &sbi->inode_list[DIRTY_META]);
1178                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1179         }
1180         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1181         return ret;
1182 }
1183
1184 void f2fs_inode_synced(struct inode *inode)
1185 {
1186         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1187
1188         spin_lock(&sbi->inode_lock[DIRTY_META]);
1189         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1190                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1191                 return;
1192         }
1193         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1194                 list_del_init(&F2FS_I(inode)->gdirty_list);
1195                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1196         }
1197         clear_inode_flag(inode, FI_DIRTY_INODE);
1198         clear_inode_flag(inode, FI_AUTO_RECOVER);
1199         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1200         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1201 }
1202
1203 /*
1204  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1205  *
1206  * We should call set_dirty_inode to write the dirty inode through write_inode.
1207  */
1208 static void f2fs_dirty_inode(struct inode *inode, int flags)
1209 {
1210         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1211
1212         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1213                         inode->i_ino == F2FS_META_INO(sbi))
1214                 return;
1215
1216         if (flags == I_DIRTY_TIME)
1217                 return;
1218
1219         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1220                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1221
1222         f2fs_inode_dirtied(inode, false);
1223 }
1224
1225 static void f2fs_free_inode(struct inode *inode)
1226 {
1227         fscrypt_free_inode(inode);
1228         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1229 }
1230
1231 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1232 {
1233         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1234         percpu_counter_destroy(&sbi->total_valid_inode_count);
1235 }
1236
1237 static void destroy_device_list(struct f2fs_sb_info *sbi)
1238 {
1239         int i;
1240
1241         for (i = 0; i < sbi->s_ndevs; i++) {
1242                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1243 #ifdef CONFIG_BLK_DEV_ZONED
1244                 kvfree(FDEV(i).blkz_seq);
1245 #endif
1246         }
1247         kvfree(sbi->devs);
1248 }
1249
1250 static void f2fs_put_super(struct super_block *sb)
1251 {
1252         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1253         int i;
1254         bool dropped;
1255
1256         /* unregister procfs/sysfs entries in advance to avoid race case */
1257         f2fs_unregister_sysfs(sbi);
1258
1259         f2fs_quota_off_umount(sb);
1260
1261         /* prevent remaining shrinker jobs */
1262         mutex_lock(&sbi->umount_mutex);
1263
1264         /*
1265          * We don't need to do checkpoint when superblock is clean.
1266          * But, the previous checkpoint was not done by umount, it needs to do
1267          * clean checkpoint again.
1268          */
1269         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1270                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1271                 struct cp_control cpc = {
1272                         .reason = CP_UMOUNT,
1273                 };
1274                 f2fs_write_checkpoint(sbi, &cpc);
1275         }
1276
1277         /* be sure to wait for any on-going discard commands */
1278         dropped = f2fs_issue_discard_timeout(sbi);
1279
1280         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1281                                         !sbi->discard_blks && !dropped) {
1282                 struct cp_control cpc = {
1283                         .reason = CP_UMOUNT | CP_TRIMMED,
1284                 };
1285                 f2fs_write_checkpoint(sbi, &cpc);
1286         }
1287
1288         /*
1289          * normally superblock is clean, so we need to release this.
1290          * In addition, EIO will skip do checkpoint, we need this as well.
1291          */
1292         f2fs_release_ino_entry(sbi, true);
1293
1294         f2fs_leave_shrinker(sbi);
1295         mutex_unlock(&sbi->umount_mutex);
1296
1297         /* our cp_error case, we can wait for any writeback page */
1298         f2fs_flush_merged_writes(sbi);
1299
1300         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1301
1302         f2fs_bug_on(sbi, sbi->fsync_node_num);
1303
1304         iput(sbi->node_inode);
1305         sbi->node_inode = NULL;
1306
1307         iput(sbi->meta_inode);
1308         sbi->meta_inode = NULL;
1309
1310         /*
1311          * iput() can update stat information, if f2fs_write_checkpoint()
1312          * above failed with error.
1313          */
1314         f2fs_destroy_stats(sbi);
1315
1316         /* destroy f2fs internal modules */
1317         f2fs_destroy_node_manager(sbi);
1318         f2fs_destroy_segment_manager(sbi);
1319
1320         f2fs_destroy_post_read_wq(sbi);
1321
1322         kvfree(sbi->ckpt);
1323
1324         sb->s_fs_info = NULL;
1325         if (sbi->s_chksum_driver)
1326                 crypto_free_shash(sbi->s_chksum_driver);
1327         kfree(sbi->raw_super);
1328
1329         destroy_device_list(sbi);
1330         f2fs_destroy_page_array_cache(sbi);
1331         f2fs_destroy_xattr_caches(sbi);
1332         mempool_destroy(sbi->write_io_dummy);
1333 #ifdef CONFIG_QUOTA
1334         for (i = 0; i < MAXQUOTAS; i++)
1335                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1336 #endif
1337         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1338         destroy_percpu_info(sbi);
1339         for (i = 0; i < NR_PAGE_TYPE; i++)
1340                 kvfree(sbi->write_io[i]);
1341 #ifdef CONFIG_UNICODE
1342         utf8_unload(sb->s_encoding);
1343 #endif
1344         kfree(sbi);
1345 }
1346
1347 int f2fs_sync_fs(struct super_block *sb, int sync)
1348 {
1349         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1350         int err = 0;
1351
1352         if (unlikely(f2fs_cp_error(sbi)))
1353                 return 0;
1354         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1355                 return 0;
1356
1357         trace_f2fs_sync_fs(sb, sync);
1358
1359         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1360                 return -EAGAIN;
1361
1362         if (sync) {
1363                 struct cp_control cpc;
1364
1365                 cpc.reason = __get_cp_reason(sbi);
1366
1367                 down_write(&sbi->gc_lock);
1368                 err = f2fs_write_checkpoint(sbi, &cpc);
1369                 up_write(&sbi->gc_lock);
1370         }
1371         f2fs_trace_ios(NULL, 1);
1372
1373         return err;
1374 }
1375
1376 static int f2fs_freeze(struct super_block *sb)
1377 {
1378         if (f2fs_readonly(sb))
1379                 return 0;
1380
1381         /* IO error happened before */
1382         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1383                 return -EIO;
1384
1385         /* must be clean, since sync_filesystem() was already called */
1386         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1387                 return -EINVAL;
1388         return 0;
1389 }
1390
1391 static int f2fs_unfreeze(struct super_block *sb)
1392 {
1393         return 0;
1394 }
1395
1396 #ifdef CONFIG_QUOTA
1397 static int f2fs_statfs_project(struct super_block *sb,
1398                                 kprojid_t projid, struct kstatfs *buf)
1399 {
1400         struct kqid qid;
1401         struct dquot *dquot;
1402         u64 limit;
1403         u64 curblock;
1404
1405         qid = make_kqid_projid(projid);
1406         dquot = dqget(sb, qid);
1407         if (IS_ERR(dquot))
1408                 return PTR_ERR(dquot);
1409         spin_lock(&dquot->dq_dqb_lock);
1410
1411         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1412                                         dquot->dq_dqb.dqb_bhardlimit);
1413         if (limit)
1414                 limit >>= sb->s_blocksize_bits;
1415
1416         if (limit && buf->f_blocks > limit) {
1417                 curblock = (dquot->dq_dqb.dqb_curspace +
1418                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1419                 buf->f_blocks = limit;
1420                 buf->f_bfree = buf->f_bavail =
1421                         (buf->f_blocks > curblock) ?
1422                          (buf->f_blocks - curblock) : 0;
1423         }
1424
1425         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1426                                         dquot->dq_dqb.dqb_ihardlimit);
1427
1428         if (limit && buf->f_files > limit) {
1429                 buf->f_files = limit;
1430                 buf->f_ffree =
1431                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1432                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1433         }
1434
1435         spin_unlock(&dquot->dq_dqb_lock);
1436         dqput(dquot);
1437         return 0;
1438 }
1439 #endif
1440
1441 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1442 {
1443         struct super_block *sb = dentry->d_sb;
1444         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1445         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1446         block_t total_count, user_block_count, start_count;
1447         u64 avail_node_count;
1448
1449         total_count = le64_to_cpu(sbi->raw_super->block_count);
1450         user_block_count = sbi->user_block_count;
1451         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1452         buf->f_type = F2FS_SUPER_MAGIC;
1453         buf->f_bsize = sbi->blocksize;
1454
1455         buf->f_blocks = total_count - start_count;
1456         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1457                                                 sbi->current_reserved_blocks;
1458
1459         spin_lock(&sbi->stat_lock);
1460         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1461                 buf->f_bfree = 0;
1462         else
1463                 buf->f_bfree -= sbi->unusable_block_count;
1464         spin_unlock(&sbi->stat_lock);
1465
1466         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1467                 buf->f_bavail = buf->f_bfree -
1468                                 F2FS_OPTION(sbi).root_reserved_blocks;
1469         else
1470                 buf->f_bavail = 0;
1471
1472         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1473
1474         if (avail_node_count > user_block_count) {
1475                 buf->f_files = user_block_count;
1476                 buf->f_ffree = buf->f_bavail;
1477         } else {
1478                 buf->f_files = avail_node_count;
1479                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1480                                         buf->f_bavail);
1481         }
1482
1483         buf->f_namelen = F2FS_NAME_LEN;
1484         buf->f_fsid    = u64_to_fsid(id);
1485
1486 #ifdef CONFIG_QUOTA
1487         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1488                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1489                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1490         }
1491 #endif
1492         return 0;
1493 }
1494
1495 static inline void f2fs_show_quota_options(struct seq_file *seq,
1496                                            struct super_block *sb)
1497 {
1498 #ifdef CONFIG_QUOTA
1499         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1500
1501         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1502                 char *fmtname = "";
1503
1504                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1505                 case QFMT_VFS_OLD:
1506                         fmtname = "vfsold";
1507                         break;
1508                 case QFMT_VFS_V0:
1509                         fmtname = "vfsv0";
1510                         break;
1511                 case QFMT_VFS_V1:
1512                         fmtname = "vfsv1";
1513                         break;
1514                 }
1515                 seq_printf(seq, ",jqfmt=%s", fmtname);
1516         }
1517
1518         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1519                 seq_show_option(seq, "usrjquota",
1520                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1521
1522         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1523                 seq_show_option(seq, "grpjquota",
1524                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1525
1526         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1527                 seq_show_option(seq, "prjjquota",
1528                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1529 #endif
1530 }
1531
1532 static inline void f2fs_show_compress_options(struct seq_file *seq,
1533                                                         struct super_block *sb)
1534 {
1535         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1536         char *algtype = "";
1537         int i;
1538
1539         if (!f2fs_sb_has_compression(sbi))
1540                 return;
1541
1542         switch (F2FS_OPTION(sbi).compress_algorithm) {
1543         case COMPRESS_LZO:
1544                 algtype = "lzo";
1545                 break;
1546         case COMPRESS_LZ4:
1547                 algtype = "lz4";
1548                 break;
1549         case COMPRESS_ZSTD:
1550                 algtype = "zstd";
1551                 break;
1552         case COMPRESS_LZORLE:
1553                 algtype = "lzo-rle";
1554                 break;
1555         }
1556         seq_printf(seq, ",compress_algorithm=%s", algtype);
1557
1558         seq_printf(seq, ",compress_log_size=%u",
1559                         F2FS_OPTION(sbi).compress_log_size);
1560
1561         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1562                 seq_printf(seq, ",compress_extension=%s",
1563                         F2FS_OPTION(sbi).extensions[i]);
1564         }
1565 }
1566
1567 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1568 {
1569         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1570
1571         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1572                 seq_printf(seq, ",background_gc=%s", "sync");
1573         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1574                 seq_printf(seq, ",background_gc=%s", "on");
1575         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1576                 seq_printf(seq, ",background_gc=%s", "off");
1577
1578         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1579                 seq_puts(seq, ",disable_roll_forward");
1580         if (test_opt(sbi, NORECOVERY))
1581                 seq_puts(seq, ",norecovery");
1582         if (test_opt(sbi, DISCARD))
1583                 seq_puts(seq, ",discard");
1584         else
1585                 seq_puts(seq, ",nodiscard");
1586         if (test_opt(sbi, NOHEAP))
1587                 seq_puts(seq, ",no_heap");
1588         else
1589                 seq_puts(seq, ",heap");
1590 #ifdef CONFIG_F2FS_FS_XATTR
1591         if (test_opt(sbi, XATTR_USER))
1592                 seq_puts(seq, ",user_xattr");
1593         else
1594                 seq_puts(seq, ",nouser_xattr");
1595         if (test_opt(sbi, INLINE_XATTR))
1596                 seq_puts(seq, ",inline_xattr");
1597         else
1598                 seq_puts(seq, ",noinline_xattr");
1599         if (test_opt(sbi, INLINE_XATTR_SIZE))
1600                 seq_printf(seq, ",inline_xattr_size=%u",
1601                                         F2FS_OPTION(sbi).inline_xattr_size);
1602 #endif
1603 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1604         if (test_opt(sbi, POSIX_ACL))
1605                 seq_puts(seq, ",acl");
1606         else
1607                 seq_puts(seq, ",noacl");
1608 #endif
1609         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1610                 seq_puts(seq, ",disable_ext_identify");
1611         if (test_opt(sbi, INLINE_DATA))
1612                 seq_puts(seq, ",inline_data");
1613         else
1614                 seq_puts(seq, ",noinline_data");
1615         if (test_opt(sbi, INLINE_DENTRY))
1616                 seq_puts(seq, ",inline_dentry");
1617         else
1618                 seq_puts(seq, ",noinline_dentry");
1619         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1620                 seq_puts(seq, ",flush_merge");
1621         if (test_opt(sbi, NOBARRIER))
1622                 seq_puts(seq, ",nobarrier");
1623         if (test_opt(sbi, FASTBOOT))
1624                 seq_puts(seq, ",fastboot");
1625         if (test_opt(sbi, EXTENT_CACHE))
1626                 seq_puts(seq, ",extent_cache");
1627         else
1628                 seq_puts(seq, ",noextent_cache");
1629         if (test_opt(sbi, DATA_FLUSH))
1630                 seq_puts(seq, ",data_flush");
1631
1632         seq_puts(seq, ",mode=");
1633         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1634                 seq_puts(seq, "adaptive");
1635         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1636                 seq_puts(seq, "lfs");
1637         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1638         if (test_opt(sbi, RESERVE_ROOT))
1639                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1640                                 F2FS_OPTION(sbi).root_reserved_blocks,
1641                                 from_kuid_munged(&init_user_ns,
1642                                         F2FS_OPTION(sbi).s_resuid),
1643                                 from_kgid_munged(&init_user_ns,
1644                                         F2FS_OPTION(sbi).s_resgid));
1645         if (F2FS_IO_SIZE_BITS(sbi))
1646                 seq_printf(seq, ",io_bits=%u",
1647                                 F2FS_OPTION(sbi).write_io_size_bits);
1648 #ifdef CONFIG_F2FS_FAULT_INJECTION
1649         if (test_opt(sbi, FAULT_INJECTION)) {
1650                 seq_printf(seq, ",fault_injection=%u",
1651                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1652                 seq_printf(seq, ",fault_type=%u",
1653                                 F2FS_OPTION(sbi).fault_info.inject_type);
1654         }
1655 #endif
1656 #ifdef CONFIG_QUOTA
1657         if (test_opt(sbi, QUOTA))
1658                 seq_puts(seq, ",quota");
1659         if (test_opt(sbi, USRQUOTA))
1660                 seq_puts(seq, ",usrquota");
1661         if (test_opt(sbi, GRPQUOTA))
1662                 seq_puts(seq, ",grpquota");
1663         if (test_opt(sbi, PRJQUOTA))
1664                 seq_puts(seq, ",prjquota");
1665 #endif
1666         f2fs_show_quota_options(seq, sbi->sb);
1667         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1668                 seq_printf(seq, ",whint_mode=%s", "user-based");
1669         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1670                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1671
1672         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1673
1674         if (sbi->sb->s_flags & SB_INLINECRYPT)
1675                 seq_puts(seq, ",inlinecrypt");
1676
1677         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1678                 seq_printf(seq, ",alloc_mode=%s", "default");
1679         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1680                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1681
1682         if (test_opt(sbi, DISABLE_CHECKPOINT))
1683                 seq_printf(seq, ",checkpoint=disable:%u",
1684                                 F2FS_OPTION(sbi).unusable_cap);
1685         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1686                 seq_printf(seq, ",fsync_mode=%s", "posix");
1687         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1688                 seq_printf(seq, ",fsync_mode=%s", "strict");
1689         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1690                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1691
1692 #ifdef CONFIG_F2FS_FS_COMPRESSION
1693         f2fs_show_compress_options(seq, sbi->sb);
1694 #endif
1695
1696         if (test_opt(sbi, ATGC))
1697                 seq_puts(seq, ",atgc");
1698         return 0;
1699 }
1700
1701 static void default_options(struct f2fs_sb_info *sbi)
1702 {
1703         /* init some FS parameters */
1704         F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
1705         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1706         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1707         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1708         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1709         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1710         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1711         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1712         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1713         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1714         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1715
1716         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1717
1718         set_opt(sbi, INLINE_XATTR);
1719         set_opt(sbi, INLINE_DATA);
1720         set_opt(sbi, INLINE_DENTRY);
1721         set_opt(sbi, EXTENT_CACHE);
1722         set_opt(sbi, NOHEAP);
1723         clear_opt(sbi, DISABLE_CHECKPOINT);
1724         F2FS_OPTION(sbi).unusable_cap = 0;
1725         sbi->sb->s_flags |= SB_LAZYTIME;
1726         set_opt(sbi, FLUSH_MERGE);
1727         set_opt(sbi, DISCARD);
1728         if (f2fs_sb_has_blkzoned(sbi))
1729                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
1730         else
1731                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
1732
1733 #ifdef CONFIG_F2FS_FS_XATTR
1734         set_opt(sbi, XATTR_USER);
1735 #endif
1736 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1737         set_opt(sbi, POSIX_ACL);
1738 #endif
1739
1740         f2fs_build_fault_attr(sbi, 0, 0);
1741 }
1742
1743 #ifdef CONFIG_QUOTA
1744 static int f2fs_enable_quotas(struct super_block *sb);
1745 #endif
1746
1747 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1748 {
1749         unsigned int s_flags = sbi->sb->s_flags;
1750         struct cp_control cpc;
1751         int err = 0;
1752         int ret;
1753         block_t unusable;
1754
1755         if (s_flags & SB_RDONLY) {
1756                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1757                 return -EINVAL;
1758         }
1759         sbi->sb->s_flags |= SB_ACTIVE;
1760
1761         f2fs_update_time(sbi, DISABLE_TIME);
1762
1763         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1764                 down_write(&sbi->gc_lock);
1765                 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
1766                 if (err == -ENODATA) {
1767                         err = 0;
1768                         break;
1769                 }
1770                 if (err && err != -EAGAIN)
1771                         break;
1772         }
1773
1774         ret = sync_filesystem(sbi->sb);
1775         if (ret || err) {
1776                 err = ret ? ret: err;
1777                 goto restore_flag;
1778         }
1779
1780         unusable = f2fs_get_unusable_blocks(sbi);
1781         if (f2fs_disable_cp_again(sbi, unusable)) {
1782                 err = -EAGAIN;
1783                 goto restore_flag;
1784         }
1785
1786         down_write(&sbi->gc_lock);
1787         cpc.reason = CP_PAUSE;
1788         set_sbi_flag(sbi, SBI_CP_DISABLED);
1789         err = f2fs_write_checkpoint(sbi, &cpc);
1790         if (err)
1791                 goto out_unlock;
1792
1793         spin_lock(&sbi->stat_lock);
1794         sbi->unusable_block_count = unusable;
1795         spin_unlock(&sbi->stat_lock);
1796
1797 out_unlock:
1798         up_write(&sbi->gc_lock);
1799 restore_flag:
1800         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
1801         return err;
1802 }
1803
1804 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1805 {
1806         int retry = DEFAULT_RETRY_IO_COUNT;
1807
1808         /* we should flush all the data to keep data consistency */
1809         do {
1810                 sync_inodes_sb(sbi->sb);
1811                 cond_resched();
1812                 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
1813         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
1814
1815         if (unlikely(retry < 0))
1816                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
1817
1818         down_write(&sbi->gc_lock);
1819         f2fs_dirty_to_prefree(sbi);
1820
1821         clear_sbi_flag(sbi, SBI_CP_DISABLED);
1822         set_sbi_flag(sbi, SBI_IS_DIRTY);
1823         up_write(&sbi->gc_lock);
1824
1825         f2fs_sync_fs(sbi->sb, 1);
1826 }
1827
1828 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1829 {
1830         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1831         struct f2fs_mount_info org_mount_opt;
1832         unsigned long old_sb_flags;
1833         int err;
1834         bool need_restart_gc = false;
1835         bool need_stop_gc = false;
1836         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1837         bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1838         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
1839         bool no_atgc = !test_opt(sbi, ATGC);
1840         bool checkpoint_changed;
1841 #ifdef CONFIG_QUOTA
1842         int i, j;
1843 #endif
1844
1845         /*
1846          * Save the old mount options in case we
1847          * need to restore them.
1848          */
1849         org_mount_opt = sbi->mount_opt;
1850         old_sb_flags = sb->s_flags;
1851
1852 #ifdef CONFIG_QUOTA
1853         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1854         for (i = 0; i < MAXQUOTAS; i++) {
1855                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1856                         org_mount_opt.s_qf_names[i] =
1857                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1858                                 GFP_KERNEL);
1859                         if (!org_mount_opt.s_qf_names[i]) {
1860                                 for (j = 0; j < i; j++)
1861                                         kfree(org_mount_opt.s_qf_names[j]);
1862                                 return -ENOMEM;
1863                         }
1864                 } else {
1865                         org_mount_opt.s_qf_names[i] = NULL;
1866                 }
1867         }
1868 #endif
1869
1870         /* recover superblocks we couldn't write due to previous RO mount */
1871         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1872                 err = f2fs_commit_super(sbi, false);
1873                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
1874                           err);
1875                 if (!err)
1876                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1877         }
1878
1879         default_options(sbi);
1880
1881         /* parse mount options */
1882         err = parse_options(sb, data, true);
1883         if (err)
1884                 goto restore_opts;
1885         checkpoint_changed =
1886                         disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1887
1888         /*
1889          * Previous and new state of filesystem is RO,
1890          * so skip checking GC and FLUSH_MERGE conditions.
1891          */
1892         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
1893                 goto skip;
1894
1895 #ifdef CONFIG_QUOTA
1896         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
1897                 err = dquot_suspend(sb, -1);
1898                 if (err < 0)
1899                         goto restore_opts;
1900         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
1901                 /* dquot_resume needs RW */
1902                 sb->s_flags &= ~SB_RDONLY;
1903                 if (sb_any_quota_suspended(sb)) {
1904                         dquot_resume(sb, -1);
1905                 } else if (f2fs_sb_has_quota_ino(sbi)) {
1906                         err = f2fs_enable_quotas(sb);
1907                         if (err)
1908                                 goto restore_opts;
1909                 }
1910         }
1911 #endif
1912         /* disallow enable atgc dynamically */
1913         if (no_atgc == !!test_opt(sbi, ATGC)) {
1914                 err = -EINVAL;
1915                 f2fs_warn(sbi, "switch atgc option is not allowed");
1916                 goto restore_opts;
1917         }
1918
1919         /* disallow enable/disable extent_cache dynamically */
1920         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1921                 err = -EINVAL;
1922                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
1923                 goto restore_opts;
1924         }
1925
1926         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
1927                 err = -EINVAL;
1928                 f2fs_warn(sbi, "switch io_bits option is not allowed");
1929                 goto restore_opts;
1930         }
1931
1932         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
1933                 err = -EINVAL;
1934                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
1935                 goto restore_opts;
1936         }
1937
1938         /*
1939          * We stop the GC thread if FS is mounted as RO
1940          * or if background_gc = off is passed in mount
1941          * option. Also sync the filesystem.
1942          */
1943         if ((*flags & SB_RDONLY) ||
1944                         F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF) {
1945                 if (sbi->gc_thread) {
1946                         f2fs_stop_gc_thread(sbi);
1947                         need_restart_gc = true;
1948                 }
1949         } else if (!sbi->gc_thread) {
1950                 err = f2fs_start_gc_thread(sbi);
1951                 if (err)
1952                         goto restore_opts;
1953                 need_stop_gc = true;
1954         }
1955
1956         if (*flags & SB_RDONLY ||
1957                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
1958                 writeback_inodes_sb(sb, WB_REASON_SYNC);
1959                 sync_inodes_sb(sb);
1960
1961                 set_sbi_flag(sbi, SBI_IS_DIRTY);
1962                 set_sbi_flag(sbi, SBI_IS_CLOSE);
1963                 f2fs_sync_fs(sb, 1);
1964                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1965         }
1966
1967         if (checkpoint_changed) {
1968                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
1969                         err = f2fs_disable_checkpoint(sbi);
1970                         if (err)
1971                                 goto restore_gc;
1972                 } else {
1973                         f2fs_enable_checkpoint(sbi);
1974                 }
1975         }
1976
1977         /*
1978          * We stop issue flush thread if FS is mounted as RO
1979          * or if flush_merge is not passed in mount option.
1980          */
1981         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
1982                 clear_opt(sbi, FLUSH_MERGE);
1983                 f2fs_destroy_flush_cmd_control(sbi, false);
1984         } else {
1985                 err = f2fs_create_flush_cmd_control(sbi);
1986                 if (err)
1987                         goto restore_gc;
1988         }
1989 skip:
1990 #ifdef CONFIG_QUOTA
1991         /* Release old quota file names */
1992         for (i = 0; i < MAXQUOTAS; i++)
1993                 kfree(org_mount_opt.s_qf_names[i]);
1994 #endif
1995         /* Update the POSIXACL Flag */
1996         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
1997                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
1998
1999         limit_reserve_root(sbi);
2000         adjust_unusable_cap_perc(sbi);
2001         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2002         return 0;
2003 restore_gc:
2004         if (need_restart_gc) {
2005                 if (f2fs_start_gc_thread(sbi))
2006                         f2fs_warn(sbi, "background gc thread has stopped");
2007         } else if (need_stop_gc) {
2008                 f2fs_stop_gc_thread(sbi);
2009         }
2010 restore_opts:
2011 #ifdef CONFIG_QUOTA
2012         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2013         for (i = 0; i < MAXQUOTAS; i++) {
2014                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2015                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2016         }
2017 #endif
2018         sbi->mount_opt = org_mount_opt;
2019         sb->s_flags = old_sb_flags;
2020         return err;
2021 }
2022
2023 #ifdef CONFIG_QUOTA
2024 /* Read data from quotafile */
2025 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2026                                size_t len, loff_t off)
2027 {
2028         struct inode *inode = sb_dqopt(sb)->files[type];
2029         struct address_space *mapping = inode->i_mapping;
2030         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2031         int offset = off & (sb->s_blocksize - 1);
2032         int tocopy;
2033         size_t toread;
2034         loff_t i_size = i_size_read(inode);
2035         struct page *page;
2036
2037         if (off > i_size)
2038                 return 0;
2039
2040         if (off + len > i_size)
2041                 len = i_size - off;
2042         toread = len;
2043         while (toread > 0) {
2044                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2045 repeat:
2046                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2047                 if (IS_ERR(page)) {
2048                         if (PTR_ERR(page) == -ENOMEM) {
2049                                 congestion_wait(BLK_RW_ASYNC,
2050                                                 DEFAULT_IO_TIMEOUT);
2051                                 goto repeat;
2052                         }
2053                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2054                         return PTR_ERR(page);
2055                 }
2056
2057                 lock_page(page);
2058
2059                 if (unlikely(page->mapping != mapping)) {
2060                         f2fs_put_page(page, 1);
2061                         goto repeat;
2062                 }
2063                 if (unlikely(!PageUptodate(page))) {
2064                         f2fs_put_page(page, 1);
2065                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2066                         return -EIO;
2067                 }
2068
2069                 memcpy_from_page(data, page, offset, tocopy);
2070                 f2fs_put_page(page, 1);
2071
2072                 offset = 0;
2073                 toread -= tocopy;
2074                 data += tocopy;
2075                 blkidx++;
2076         }
2077         return len;
2078 }
2079
2080 /* Write to quotafile */
2081 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2082                                 const char *data, size_t len, loff_t off)
2083 {
2084         struct inode *inode = sb_dqopt(sb)->files[type];
2085         struct address_space *mapping = inode->i_mapping;
2086         const struct address_space_operations *a_ops = mapping->a_ops;
2087         int offset = off & (sb->s_blocksize - 1);
2088         size_t towrite = len;
2089         struct page *page;
2090         void *fsdata = NULL;
2091         int err = 0;
2092         int tocopy;
2093
2094         while (towrite > 0) {
2095                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2096                                                                 towrite);
2097 retry:
2098                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2099                                                         &page, &fsdata);
2100                 if (unlikely(err)) {
2101                         if (err == -ENOMEM) {
2102                                 congestion_wait(BLK_RW_ASYNC,
2103                                                 DEFAULT_IO_TIMEOUT);
2104                                 goto retry;
2105                         }
2106                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2107                         break;
2108                 }
2109
2110                 memcpy_to_page(page, offset, data, tocopy);
2111
2112                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2113                                                 page, fsdata);
2114                 offset = 0;
2115                 towrite -= tocopy;
2116                 off += tocopy;
2117                 data += tocopy;
2118                 cond_resched();
2119         }
2120
2121         if (len == towrite)
2122                 return err;
2123         inode->i_mtime = inode->i_ctime = current_time(inode);
2124         f2fs_mark_inode_dirty_sync(inode, false);
2125         return len - towrite;
2126 }
2127
2128 static struct dquot **f2fs_get_dquots(struct inode *inode)
2129 {
2130         return F2FS_I(inode)->i_dquot;
2131 }
2132
2133 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2134 {
2135         return &F2FS_I(inode)->i_reserved_quota;
2136 }
2137
2138 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2139 {
2140         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2141                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2142                 return 0;
2143         }
2144
2145         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2146                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2147 }
2148
2149 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2150 {
2151         int enabled = 0;
2152         int i, err;
2153
2154         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2155                 err = f2fs_enable_quotas(sbi->sb);
2156                 if (err) {
2157                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2158                         return 0;
2159                 }
2160                 return 1;
2161         }
2162
2163         for (i = 0; i < MAXQUOTAS; i++) {
2164                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2165                         err = f2fs_quota_on_mount(sbi, i);
2166                         if (!err) {
2167                                 enabled = 1;
2168                                 continue;
2169                         }
2170                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2171                                  err, i);
2172                 }
2173         }
2174         return enabled;
2175 }
2176
2177 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2178                              unsigned int flags)
2179 {
2180         struct inode *qf_inode;
2181         unsigned long qf_inum;
2182         int err;
2183
2184         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2185
2186         qf_inum = f2fs_qf_ino(sb, type);
2187         if (!qf_inum)
2188                 return -EPERM;
2189
2190         qf_inode = f2fs_iget(sb, qf_inum);
2191         if (IS_ERR(qf_inode)) {
2192                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2193                 return PTR_ERR(qf_inode);
2194         }
2195
2196         /* Don't account quota for quota files to avoid recursion */
2197         qf_inode->i_flags |= S_NOQUOTA;
2198         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2199         iput(qf_inode);
2200         return err;
2201 }
2202
2203 static int f2fs_enable_quotas(struct super_block *sb)
2204 {
2205         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2206         int type, err = 0;
2207         unsigned long qf_inum;
2208         bool quota_mopt[MAXQUOTAS] = {
2209                 test_opt(sbi, USRQUOTA),
2210                 test_opt(sbi, GRPQUOTA),
2211                 test_opt(sbi, PRJQUOTA),
2212         };
2213
2214         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2215                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2216                 return 0;
2217         }
2218
2219         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2220
2221         for (type = 0; type < MAXQUOTAS; type++) {
2222                 qf_inum = f2fs_qf_ino(sb, type);
2223                 if (qf_inum) {
2224                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2225                                 DQUOT_USAGE_ENABLED |
2226                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2227                         if (err) {
2228                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2229                                          type, err);
2230                                 for (type--; type >= 0; type--)
2231                                         dquot_quota_off(sb, type);
2232                                 set_sbi_flag(F2FS_SB(sb),
2233                                                 SBI_QUOTA_NEED_REPAIR);
2234                                 return err;
2235                         }
2236                 }
2237         }
2238         return 0;
2239 }
2240
2241 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2242 {
2243         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2244         struct address_space *mapping = dqopt->files[type]->i_mapping;
2245         int ret = 0;
2246
2247         ret = dquot_writeback_dquots(sbi->sb, type);
2248         if (ret)
2249                 goto out;
2250
2251         ret = filemap_fdatawrite(mapping);
2252         if (ret)
2253                 goto out;
2254
2255         /* if we are using journalled quota */
2256         if (is_journalled_quota(sbi))
2257                 goto out;
2258
2259         ret = filemap_fdatawait(mapping);
2260
2261         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2262 out:
2263         if (ret)
2264                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2265         return ret;
2266 }
2267
2268 int f2fs_quota_sync(struct super_block *sb, int type)
2269 {
2270         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2271         struct quota_info *dqopt = sb_dqopt(sb);
2272         int cnt;
2273         int ret = 0;
2274
2275         /*
2276          * Now when everything is written we can discard the pagecache so
2277          * that userspace sees the changes.
2278          */
2279         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2280
2281                 if (type != -1 && cnt != type)
2282                         continue;
2283
2284                 if (!sb_has_quota_active(sb, cnt))
2285                         continue;
2286
2287                 if (!f2fs_sb_has_quota_ino(sbi))
2288                         inode_lock(dqopt->files[cnt]);
2289
2290                 /*
2291                  * do_quotactl
2292                  *  f2fs_quota_sync
2293                  *  down_read(quota_sem)
2294                  *  dquot_writeback_dquots()
2295                  *  f2fs_dquot_commit
2296                  *                            block_operation
2297                  *                            down_read(quota_sem)
2298                  */
2299                 f2fs_lock_op(sbi);
2300                 down_read(&sbi->quota_sem);
2301
2302                 ret = f2fs_quota_sync_file(sbi, cnt);
2303
2304                 up_read(&sbi->quota_sem);
2305                 f2fs_unlock_op(sbi);
2306
2307                 if (!f2fs_sb_has_quota_ino(sbi))
2308                         inode_unlock(dqopt->files[cnt]);
2309
2310                 if (ret)
2311                         break;
2312         }
2313         return ret;
2314 }
2315
2316 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2317                                                         const struct path *path)
2318 {
2319         struct inode *inode;
2320         int err;
2321
2322         /* if quota sysfile exists, deny enabling quota with specific file */
2323         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2324                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2325                 return -EBUSY;
2326         }
2327
2328         err = f2fs_quota_sync(sb, type);
2329         if (err)
2330                 return err;
2331
2332         err = dquot_quota_on(sb, type, format_id, path);
2333         if (err)
2334                 return err;
2335
2336         inode = d_inode(path->dentry);
2337
2338         inode_lock(inode);
2339         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2340         f2fs_set_inode_flags(inode);
2341         inode_unlock(inode);
2342         f2fs_mark_inode_dirty_sync(inode, false);
2343
2344         return 0;
2345 }
2346
2347 static int __f2fs_quota_off(struct super_block *sb, int type)
2348 {
2349         struct inode *inode = sb_dqopt(sb)->files[type];
2350         int err;
2351
2352         if (!inode || !igrab(inode))
2353                 return dquot_quota_off(sb, type);
2354
2355         err = f2fs_quota_sync(sb, type);
2356         if (err)
2357                 goto out_put;
2358
2359         err = dquot_quota_off(sb, type);
2360         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2361                 goto out_put;
2362
2363         inode_lock(inode);
2364         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2365         f2fs_set_inode_flags(inode);
2366         inode_unlock(inode);
2367         f2fs_mark_inode_dirty_sync(inode, false);
2368 out_put:
2369         iput(inode);
2370         return err;
2371 }
2372
2373 static int f2fs_quota_off(struct super_block *sb, int type)
2374 {
2375         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2376         int err;
2377
2378         err = __f2fs_quota_off(sb, type);
2379
2380         /*
2381          * quotactl can shutdown journalled quota, result in inconsistence
2382          * between quota record and fs data by following updates, tag the
2383          * flag to let fsck be aware of it.
2384          */
2385         if (is_journalled_quota(sbi))
2386                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2387         return err;
2388 }
2389
2390 void f2fs_quota_off_umount(struct super_block *sb)
2391 {
2392         int type;
2393         int err;
2394
2395         for (type = 0; type < MAXQUOTAS; type++) {
2396                 err = __f2fs_quota_off(sb, type);
2397                 if (err) {
2398                         int ret = dquot_quota_off(sb, type);
2399
2400                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2401                                  type, err, ret);
2402                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2403                 }
2404         }
2405         /*
2406          * In case of checkpoint=disable, we must flush quota blocks.
2407          * This can cause NULL exception for node_inode in end_io, since
2408          * put_super already dropped it.
2409          */
2410         sync_filesystem(sb);
2411 }
2412
2413 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2414 {
2415         struct quota_info *dqopt = sb_dqopt(sb);
2416         int type;
2417
2418         for (type = 0; type < MAXQUOTAS; type++) {
2419                 if (!dqopt->files[type])
2420                         continue;
2421                 f2fs_inode_synced(dqopt->files[type]);
2422         }
2423 }
2424
2425 static int f2fs_dquot_commit(struct dquot *dquot)
2426 {
2427         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2428         int ret;
2429
2430         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2431         ret = dquot_commit(dquot);
2432         if (ret < 0)
2433                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2434         up_read(&sbi->quota_sem);
2435         return ret;
2436 }
2437
2438 static int f2fs_dquot_acquire(struct dquot *dquot)
2439 {
2440         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2441         int ret;
2442
2443         down_read(&sbi->quota_sem);
2444         ret = dquot_acquire(dquot);
2445         if (ret < 0)
2446                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2447         up_read(&sbi->quota_sem);
2448         return ret;
2449 }
2450
2451 static int f2fs_dquot_release(struct dquot *dquot)
2452 {
2453         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2454         int ret = dquot_release(dquot);
2455
2456         if (ret < 0)
2457                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2458         return ret;
2459 }
2460
2461 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2462 {
2463         struct super_block *sb = dquot->dq_sb;
2464         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2465         int ret = dquot_mark_dquot_dirty(dquot);
2466
2467         /* if we are using journalled quota */
2468         if (is_journalled_quota(sbi))
2469                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2470
2471         return ret;
2472 }
2473
2474 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2475 {
2476         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2477         int ret = dquot_commit_info(sb, type);
2478
2479         if (ret < 0)
2480                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2481         return ret;
2482 }
2483
2484 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2485 {
2486         *projid = F2FS_I(inode)->i_projid;
2487         return 0;
2488 }
2489
2490 static const struct dquot_operations f2fs_quota_operations = {
2491         .get_reserved_space = f2fs_get_reserved_space,
2492         .write_dquot    = f2fs_dquot_commit,
2493         .acquire_dquot  = f2fs_dquot_acquire,
2494         .release_dquot  = f2fs_dquot_release,
2495         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2496         .write_info     = f2fs_dquot_commit_info,
2497         .alloc_dquot    = dquot_alloc,
2498         .destroy_dquot  = dquot_destroy,
2499         .get_projid     = f2fs_get_projid,
2500         .get_next_id    = dquot_get_next_id,
2501 };
2502
2503 static const struct quotactl_ops f2fs_quotactl_ops = {
2504         .quota_on       = f2fs_quota_on,
2505         .quota_off      = f2fs_quota_off,
2506         .quota_sync     = f2fs_quota_sync,
2507         .get_state      = dquot_get_state,
2508         .set_info       = dquot_set_dqinfo,
2509         .get_dqblk      = dquot_get_dqblk,
2510         .set_dqblk      = dquot_set_dqblk,
2511         .get_nextdqblk  = dquot_get_next_dqblk,
2512 };
2513 #else
2514 int f2fs_quota_sync(struct super_block *sb, int type)
2515 {
2516         return 0;
2517 }
2518
2519 void f2fs_quota_off_umount(struct super_block *sb)
2520 {
2521 }
2522 #endif
2523
2524 static const struct super_operations f2fs_sops = {
2525         .alloc_inode    = f2fs_alloc_inode,
2526         .free_inode     = f2fs_free_inode,
2527         .drop_inode     = f2fs_drop_inode,
2528         .write_inode    = f2fs_write_inode,
2529         .dirty_inode    = f2fs_dirty_inode,
2530         .show_options   = f2fs_show_options,
2531 #ifdef CONFIG_QUOTA
2532         .quota_read     = f2fs_quota_read,
2533         .quota_write    = f2fs_quota_write,
2534         .get_dquots     = f2fs_get_dquots,
2535 #endif
2536         .evict_inode    = f2fs_evict_inode,
2537         .put_super      = f2fs_put_super,
2538         .sync_fs        = f2fs_sync_fs,
2539         .freeze_fs      = f2fs_freeze,
2540         .unfreeze_fs    = f2fs_unfreeze,
2541         .statfs         = f2fs_statfs,
2542         .remount_fs     = f2fs_remount,
2543 };
2544
2545 #ifdef CONFIG_FS_ENCRYPTION
2546 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2547 {
2548         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2549                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2550                                 ctx, len, NULL);
2551 }
2552
2553 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2554                                                         void *fs_data)
2555 {
2556         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2557
2558         /*
2559          * Encrypting the root directory is not allowed because fsck
2560          * expects lost+found directory to exist and remain unencrypted
2561          * if LOST_FOUND feature is enabled.
2562          *
2563          */
2564         if (f2fs_sb_has_lost_found(sbi) &&
2565                         inode->i_ino == F2FS_ROOT_INO(sbi))
2566                 return -EPERM;
2567
2568         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2569                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2570                                 ctx, len, fs_data, XATTR_CREATE);
2571 }
2572
2573 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2574 {
2575         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2576 }
2577
2578 static bool f2fs_has_stable_inodes(struct super_block *sb)
2579 {
2580         return true;
2581 }
2582
2583 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2584                                        int *ino_bits_ret, int *lblk_bits_ret)
2585 {
2586         *ino_bits_ret = 8 * sizeof(nid_t);
2587         *lblk_bits_ret = 8 * sizeof(block_t);
2588 }
2589
2590 static int f2fs_get_num_devices(struct super_block *sb)
2591 {
2592         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2593
2594         if (f2fs_is_multi_device(sbi))
2595                 return sbi->s_ndevs;
2596         return 1;
2597 }
2598
2599 static void f2fs_get_devices(struct super_block *sb,
2600                              struct request_queue **devs)
2601 {
2602         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2603         int i;
2604
2605         for (i = 0; i < sbi->s_ndevs; i++)
2606                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2607 }
2608
2609 static const struct fscrypt_operations f2fs_cryptops = {
2610         .key_prefix             = "f2fs:",
2611         .get_context            = f2fs_get_context,
2612         .set_context            = f2fs_set_context,
2613         .get_dummy_policy       = f2fs_get_dummy_policy,
2614         .empty_dir              = f2fs_empty_dir,
2615         .max_namelen            = F2FS_NAME_LEN,
2616         .has_stable_inodes      = f2fs_has_stable_inodes,
2617         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2618         .get_num_devices        = f2fs_get_num_devices,
2619         .get_devices            = f2fs_get_devices,
2620 };
2621 #endif
2622
2623 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2624                 u64 ino, u32 generation)
2625 {
2626         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2627         struct inode *inode;
2628
2629         if (f2fs_check_nid_range(sbi, ino))
2630                 return ERR_PTR(-ESTALE);
2631
2632         /*
2633          * f2fs_iget isn't quite right if the inode is currently unallocated!
2634          * However f2fs_iget currently does appropriate checks to handle stale
2635          * inodes so everything is OK.
2636          */
2637         inode = f2fs_iget(sb, ino);
2638         if (IS_ERR(inode))
2639                 return ERR_CAST(inode);
2640         if (unlikely(generation && inode->i_generation != generation)) {
2641                 /* we didn't find the right inode.. */
2642                 iput(inode);
2643                 return ERR_PTR(-ESTALE);
2644         }
2645         return inode;
2646 }
2647
2648 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2649                 int fh_len, int fh_type)
2650 {
2651         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2652                                     f2fs_nfs_get_inode);
2653 }
2654
2655 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2656                 int fh_len, int fh_type)
2657 {
2658         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2659                                     f2fs_nfs_get_inode);
2660 }
2661
2662 static const struct export_operations f2fs_export_ops = {
2663         .fh_to_dentry = f2fs_fh_to_dentry,
2664         .fh_to_parent = f2fs_fh_to_parent,
2665         .get_parent = f2fs_get_parent,
2666 };
2667
2668 static loff_t max_file_blocks(void)
2669 {
2670         loff_t result = 0;
2671         loff_t leaf_count = DEF_ADDRS_PER_BLOCK;
2672
2673         /*
2674          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2675          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2676          * space in inode.i_addr, it will be more safe to reassign
2677          * result as zero.
2678          */
2679
2680         /* two direct node blocks */
2681         result += (leaf_count * 2);
2682
2683         /* two indirect node blocks */
2684         leaf_count *= NIDS_PER_BLOCK;
2685         result += (leaf_count * 2);
2686
2687         /* one double indirect node block */
2688         leaf_count *= NIDS_PER_BLOCK;
2689         result += leaf_count;
2690
2691         return result;
2692 }
2693
2694 static int __f2fs_commit_super(struct buffer_head *bh,
2695                         struct f2fs_super_block *super)
2696 {
2697         lock_buffer(bh);
2698         if (super)
2699                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2700         set_buffer_dirty(bh);
2701         unlock_buffer(bh);
2702
2703         /* it's rare case, we can do fua all the time */
2704         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2705 }
2706
2707 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2708                                         struct buffer_head *bh)
2709 {
2710         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2711                                         (bh->b_data + F2FS_SUPER_OFFSET);
2712         struct super_block *sb = sbi->sb;
2713         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2714         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2715         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2716         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2717         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2718         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2719         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2720         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2721         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2722         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2723         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2724         u32 segment_count = le32_to_cpu(raw_super->segment_count);
2725         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2726         u64 main_end_blkaddr = main_blkaddr +
2727                                 (segment_count_main << log_blocks_per_seg);
2728         u64 seg_end_blkaddr = segment0_blkaddr +
2729                                 (segment_count << log_blocks_per_seg);
2730
2731         if (segment0_blkaddr != cp_blkaddr) {
2732                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2733                           segment0_blkaddr, cp_blkaddr);
2734                 return true;
2735         }
2736
2737         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2738                                                         sit_blkaddr) {
2739                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2740                           cp_blkaddr, sit_blkaddr,
2741                           segment_count_ckpt << log_blocks_per_seg);
2742                 return true;
2743         }
2744
2745         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2746                                                         nat_blkaddr) {
2747                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2748                           sit_blkaddr, nat_blkaddr,
2749                           segment_count_sit << log_blocks_per_seg);
2750                 return true;
2751         }
2752
2753         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2754                                                         ssa_blkaddr) {
2755                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2756                           nat_blkaddr, ssa_blkaddr,
2757                           segment_count_nat << log_blocks_per_seg);
2758                 return true;
2759         }
2760
2761         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2762                                                         main_blkaddr) {
2763                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2764                           ssa_blkaddr, main_blkaddr,
2765                           segment_count_ssa << log_blocks_per_seg);
2766                 return true;
2767         }
2768
2769         if (main_end_blkaddr > seg_end_blkaddr) {
2770                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
2771                           main_blkaddr, seg_end_blkaddr,
2772                           segment_count_main << log_blocks_per_seg);
2773                 return true;
2774         } else if (main_end_blkaddr < seg_end_blkaddr) {
2775                 int err = 0;
2776                 char *res;
2777
2778                 /* fix in-memory information all the time */
2779                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2780                                 segment0_blkaddr) >> log_blocks_per_seg);
2781
2782                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2783                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2784                         res = "internally";
2785                 } else {
2786                         err = __f2fs_commit_super(bh, NULL);
2787                         res = err ? "failed" : "done";
2788                 }
2789                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
2790                           res, main_blkaddr, seg_end_blkaddr,
2791                           segment_count_main << log_blocks_per_seg);
2792                 if (err)
2793                         return true;
2794         }
2795         return false;
2796 }
2797
2798 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2799                                 struct buffer_head *bh)
2800 {
2801         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
2802         block_t total_sections, blocks_per_seg;
2803         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2804                                         (bh->b_data + F2FS_SUPER_OFFSET);
2805         size_t crc_offset = 0;
2806         __u32 crc = 0;
2807
2808         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
2809                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
2810                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2811                 return -EINVAL;
2812         }
2813
2814         /* Check checksum_offset and crc in superblock */
2815         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2816                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2817                 if (crc_offset !=
2818                         offsetof(struct f2fs_super_block, crc)) {
2819                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
2820                                   crc_offset);
2821                         return -EFSCORRUPTED;
2822                 }
2823                 crc = le32_to_cpu(raw_super->crc);
2824                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2825                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
2826                         return -EFSCORRUPTED;
2827                 }
2828         }
2829
2830         /* Currently, support only 4KB page cache size */
2831         if (F2FS_BLKSIZE != PAGE_SIZE) {
2832                 f2fs_info(sbi, "Invalid page_cache_size (%lu), supports only 4KB",
2833                           PAGE_SIZE);
2834                 return -EFSCORRUPTED;
2835         }
2836
2837         /* Currently, support only 4KB block size */
2838         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
2839                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
2840                           le32_to_cpu(raw_super->log_blocksize),
2841                           F2FS_BLKSIZE_BITS);
2842                 return -EFSCORRUPTED;
2843         }
2844
2845         /* check log blocks per segment */
2846         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2847                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
2848                           le32_to_cpu(raw_super->log_blocks_per_seg));
2849                 return -EFSCORRUPTED;
2850         }
2851
2852         /* Currently, support 512/1024/2048/4096 bytes sector size */
2853         if (le32_to_cpu(raw_super->log_sectorsize) >
2854                                 F2FS_MAX_LOG_SECTOR_SIZE ||
2855                 le32_to_cpu(raw_super->log_sectorsize) <
2856                                 F2FS_MIN_LOG_SECTOR_SIZE) {
2857                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
2858                           le32_to_cpu(raw_super->log_sectorsize));
2859                 return -EFSCORRUPTED;
2860         }
2861         if (le32_to_cpu(raw_super->log_sectors_per_block) +
2862                 le32_to_cpu(raw_super->log_sectorsize) !=
2863                         F2FS_MAX_LOG_SECTOR_SIZE) {
2864                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
2865                           le32_to_cpu(raw_super->log_sectors_per_block),
2866                           le32_to_cpu(raw_super->log_sectorsize));
2867                 return -EFSCORRUPTED;
2868         }
2869
2870         segment_count = le32_to_cpu(raw_super->segment_count);
2871         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2872         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2873         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2874         total_sections = le32_to_cpu(raw_super->section_count);
2875
2876         /* blocks_per_seg should be 512, given the above check */
2877         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2878
2879         if (segment_count > F2FS_MAX_SEGMENT ||
2880                                 segment_count < F2FS_MIN_SEGMENTS) {
2881                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
2882                 return -EFSCORRUPTED;
2883         }
2884
2885         if (total_sections > segment_count_main || total_sections < 1 ||
2886                         segs_per_sec > segment_count || !segs_per_sec) {
2887                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
2888                           segment_count, total_sections, segs_per_sec);
2889                 return -EFSCORRUPTED;
2890         }
2891
2892         if (segment_count_main != total_sections * segs_per_sec) {
2893                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
2894                           segment_count_main, total_sections, segs_per_sec);
2895                 return -EFSCORRUPTED;
2896         }
2897
2898         if ((segment_count / segs_per_sec) < total_sections) {
2899                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
2900                           segment_count, segs_per_sec, total_sections);
2901                 return -EFSCORRUPTED;
2902         }
2903
2904         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
2905                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
2906                           segment_count, le64_to_cpu(raw_super->block_count));
2907                 return -EFSCORRUPTED;
2908         }
2909
2910         if (RDEV(0).path[0]) {
2911                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
2912                 int i = 1;
2913
2914                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
2915                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
2916                         i++;
2917                 }
2918                 if (segment_count != dev_seg_count) {
2919                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
2920                                         segment_count, dev_seg_count);
2921                         return -EFSCORRUPTED;
2922                 }
2923         } else {
2924                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
2925                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
2926                         f2fs_info(sbi, "Zoned block device path is missing");
2927                         return -EFSCORRUPTED;
2928                 }
2929         }
2930
2931         if (secs_per_zone > total_sections || !secs_per_zone) {
2932                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
2933                           secs_per_zone, total_sections);
2934                 return -EFSCORRUPTED;
2935         }
2936         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2937                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2938                         (le32_to_cpu(raw_super->extension_count) +
2939                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2940                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
2941                           le32_to_cpu(raw_super->extension_count),
2942                           raw_super->hot_ext_count,
2943                           F2FS_MAX_EXTENSION);
2944                 return -EFSCORRUPTED;
2945         }
2946
2947         if (le32_to_cpu(raw_super->cp_payload) >=
2948                                 (blocks_per_seg - F2FS_CP_PACKS -
2949                                 NR_CURSEG_PERSIST_TYPE)) {
2950                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
2951                           le32_to_cpu(raw_super->cp_payload),
2952                           blocks_per_seg - F2FS_CP_PACKS -
2953                           NR_CURSEG_PERSIST_TYPE);
2954                 return -EFSCORRUPTED;
2955         }
2956
2957         /* check reserved ino info */
2958         if (le32_to_cpu(raw_super->node_ino) != 1 ||
2959                 le32_to_cpu(raw_super->meta_ino) != 2 ||
2960                 le32_to_cpu(raw_super->root_ino) != 3) {
2961                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2962                           le32_to_cpu(raw_super->node_ino),
2963                           le32_to_cpu(raw_super->meta_ino),
2964                           le32_to_cpu(raw_super->root_ino));
2965                 return -EFSCORRUPTED;
2966         }
2967
2968         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
2969         if (sanity_check_area_boundary(sbi, bh))
2970                 return -EFSCORRUPTED;
2971
2972         return 0;
2973 }
2974
2975 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
2976 {
2977         unsigned int total, fsmeta;
2978         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2979         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2980         unsigned int ovp_segments, reserved_segments;
2981         unsigned int main_segs, blocks_per_seg;
2982         unsigned int sit_segs, nat_segs;
2983         unsigned int sit_bitmap_size, nat_bitmap_size;
2984         unsigned int log_blocks_per_seg;
2985         unsigned int segment_count_main;
2986         unsigned int cp_pack_start_sum, cp_payload;
2987         block_t user_block_count, valid_user_blocks;
2988         block_t avail_node_count, valid_node_count;
2989         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
2990         int i, j;
2991
2992         total = le32_to_cpu(raw_super->segment_count);
2993         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
2994         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
2995         fsmeta += sit_segs;
2996         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
2997         fsmeta += nat_segs;
2998         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
2999         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3000
3001         if (unlikely(fsmeta >= total))
3002                 return 1;
3003
3004         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3005         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3006
3007         if (unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3008                         ovp_segments == 0 || reserved_segments == 0)) {
3009                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3010                 return 1;
3011         }
3012
3013         user_block_count = le64_to_cpu(ckpt->user_block_count);
3014         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3015         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3016         if (!user_block_count || user_block_count >=
3017                         segment_count_main << log_blocks_per_seg) {
3018                 f2fs_err(sbi, "Wrong user_block_count: %u",
3019                          user_block_count);
3020                 return 1;
3021         }
3022
3023         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3024         if (valid_user_blocks > user_block_count) {
3025                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3026                          valid_user_blocks, user_block_count);
3027                 return 1;
3028         }
3029
3030         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3031         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3032         if (valid_node_count > avail_node_count) {
3033                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3034                          valid_node_count, avail_node_count);
3035                 return 1;
3036         }
3037
3038         main_segs = le32_to_cpu(raw_super->segment_count_main);
3039         blocks_per_seg = sbi->blocks_per_seg;
3040
3041         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3042                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3043                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3044                         return 1;
3045                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3046                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3047                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3048                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3049                                          i, j,
3050                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3051                                 return 1;
3052                         }
3053                 }
3054         }
3055         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3056                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3057                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3058                         return 1;
3059                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3060                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3061                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3062                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3063                                          i, j,
3064                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3065                                 return 1;
3066                         }
3067                 }
3068         }
3069         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3070                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3071                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3072                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3073                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3074                                          i, j,
3075                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3076                                 return 1;
3077                         }
3078                 }
3079         }
3080
3081         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3082         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3083
3084         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3085                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3086                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3087                          sit_bitmap_size, nat_bitmap_size);
3088                 return 1;
3089         }
3090
3091         cp_pack_start_sum = __start_sum_addr(sbi);
3092         cp_payload = __cp_payload(sbi);
3093         if (cp_pack_start_sum < cp_payload + 1 ||
3094                 cp_pack_start_sum > blocks_per_seg - 1 -
3095                         NR_CURSEG_PERSIST_TYPE) {
3096                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3097                          cp_pack_start_sum);
3098                 return 1;
3099         }
3100
3101         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3102                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3103                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3104                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3105                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3106                           le32_to_cpu(ckpt->checksum_offset));
3107                 return 1;
3108         }
3109
3110         nat_blocks = nat_segs << log_blocks_per_seg;
3111         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3112         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3113         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3114                 (cp_payload + F2FS_CP_PACKS +
3115                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3116                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3117                           cp_payload, nat_bits_blocks);
3118                 return 1;
3119         }
3120
3121         if (unlikely(f2fs_cp_error(sbi))) {
3122                 f2fs_err(sbi, "A bug case: need to run fsck");
3123                 return 1;
3124         }
3125         return 0;
3126 }
3127
3128 static void init_sb_info(struct f2fs_sb_info *sbi)
3129 {
3130         struct f2fs_super_block *raw_super = sbi->raw_super;
3131         int i;
3132
3133         sbi->log_sectors_per_block =
3134                 le32_to_cpu(raw_super->log_sectors_per_block);
3135         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3136         sbi->blocksize = 1 << sbi->log_blocksize;
3137         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3138         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3139         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3140         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3141         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3142         sbi->total_node_count =
3143                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3144                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3145         sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
3146         sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
3147         sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
3148         sbi->cur_victim_sec = NULL_SECNO;
3149         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3150         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3151         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3152         sbi->migration_granularity = sbi->segs_per_sec;
3153
3154         sbi->dir_level = DEF_DIR_LEVEL;
3155         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3156         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3157         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3158         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3159         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3160         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3161                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3162         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3163
3164         for (i = 0; i < NR_COUNT_TYPE; i++)
3165                 atomic_set(&sbi->nr_pages[i], 0);
3166
3167         for (i = 0; i < META; i++)
3168                 atomic_set(&sbi->wb_sync_req[i], 0);
3169
3170         INIT_LIST_HEAD(&sbi->s_list);
3171         mutex_init(&sbi->umount_mutex);
3172         init_rwsem(&sbi->io_order_lock);
3173         spin_lock_init(&sbi->cp_lock);
3174
3175         sbi->dirty_device = 0;
3176         spin_lock_init(&sbi->dev_lock);
3177
3178         init_rwsem(&sbi->sb_lock);
3179         init_rwsem(&sbi->pin_sem);
3180 }
3181
3182 static int init_percpu_info(struct f2fs_sb_info *sbi)
3183 {
3184         int err;
3185
3186         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3187         if (err)
3188                 return err;
3189
3190         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3191                                                                 GFP_KERNEL);
3192         if (err)
3193                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3194
3195         return err;
3196 }
3197
3198 #ifdef CONFIG_BLK_DEV_ZONED
3199
3200 struct f2fs_report_zones_args {
3201         struct f2fs_sb_info *sbi;
3202         struct f2fs_dev_info *dev;
3203 };
3204
3205 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3206                               void *data)
3207 {
3208         struct f2fs_report_zones_args *rz_args = data;
3209         block_t unusable_blocks = (zone->len - zone->capacity) >>
3210                                         F2FS_LOG_SECTORS_PER_BLOCK;
3211
3212         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3213                 return 0;
3214
3215         set_bit(idx, rz_args->dev->blkz_seq);
3216         if (!rz_args->sbi->unusable_blocks_per_sec) {
3217                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3218                 return 0;
3219         }
3220         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3221                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3222                 return -EINVAL;
3223         }
3224         return 0;
3225 }
3226
3227 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3228 {
3229         struct block_device *bdev = FDEV(devi).bdev;
3230         sector_t nr_sectors = bdev->bd_part->nr_sects;
3231         struct f2fs_report_zones_args rep_zone_arg;
3232         int ret;
3233
3234         if (!f2fs_sb_has_blkzoned(sbi))
3235                 return 0;
3236
3237         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3238                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3239                 return -EINVAL;
3240         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3241         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3242                                 __ilog2_u32(sbi->blocks_per_blkz))
3243                 return -EINVAL;
3244         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3245         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3246                                         sbi->log_blocks_per_blkz;
3247         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3248                 FDEV(devi).nr_blkz++;
3249
3250         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3251                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3252                                         * sizeof(unsigned long),
3253                                         GFP_KERNEL);
3254         if (!FDEV(devi).blkz_seq)
3255                 return -ENOMEM;
3256
3257         rep_zone_arg.sbi = sbi;
3258         rep_zone_arg.dev = &FDEV(devi);
3259
3260         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3261                                   &rep_zone_arg);
3262         if (ret < 0)
3263                 return ret;
3264         return 0;
3265 }
3266 #endif
3267
3268 /*
3269  * Read f2fs raw super block.
3270  * Because we have two copies of super block, so read both of them
3271  * to get the first valid one. If any one of them is broken, we pass
3272  * them recovery flag back to the caller.
3273  */
3274 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3275                         struct f2fs_super_block **raw_super,
3276                         int *valid_super_block, int *recovery)
3277 {
3278         struct super_block *sb = sbi->sb;
3279         int block;
3280         struct buffer_head *bh;
3281         struct f2fs_super_block *super;
3282         int err = 0;
3283
3284         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3285         if (!super)
3286                 return -ENOMEM;
3287
3288         for (block = 0; block < 2; block++) {
3289                 bh = sb_bread(sb, block);
3290                 if (!bh) {
3291                         f2fs_err(sbi, "Unable to read %dth superblock",
3292                                  block + 1);
3293                         err = -EIO;
3294                         *recovery = 1;
3295                         continue;
3296                 }
3297
3298                 /* sanity checking of raw super */
3299                 err = sanity_check_raw_super(sbi, bh);
3300                 if (err) {
3301                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3302                                  block + 1);
3303                         brelse(bh);
3304                         *recovery = 1;
3305                         continue;
3306                 }
3307
3308                 if (!*raw_super) {
3309                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3310                                                         sizeof(*super));
3311                         *valid_super_block = block;
3312                         *raw_super = super;
3313                 }
3314                 brelse(bh);
3315         }
3316
3317         /* No valid superblock */
3318         if (!*raw_super)
3319                 kfree(super);
3320         else
3321                 err = 0;
3322
3323         return err;
3324 }
3325
3326 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3327 {
3328         struct buffer_head *bh;
3329         __u32 crc = 0;
3330         int err;
3331
3332         if ((recover && f2fs_readonly(sbi->sb)) ||
3333                                 bdev_read_only(sbi->sb->s_bdev)) {
3334                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3335                 return -EROFS;
3336         }
3337
3338         /* we should update superblock crc here */
3339         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3340                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3341                                 offsetof(struct f2fs_super_block, crc));
3342                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3343         }
3344
3345         /* write back-up superblock first */
3346         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3347         if (!bh)
3348                 return -EIO;
3349         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3350         brelse(bh);
3351
3352         /* if we are in recovery path, skip writing valid superblock */
3353         if (recover || err)
3354                 return err;
3355
3356         /* write current valid superblock */
3357         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3358         if (!bh)
3359                 return -EIO;
3360         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3361         brelse(bh);
3362         return err;
3363 }
3364
3365 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3366 {
3367         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3368         unsigned int max_devices = MAX_DEVICES;
3369         int i;
3370
3371         /* Initialize single device information */
3372         if (!RDEV(0).path[0]) {
3373                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3374                         return 0;
3375                 max_devices = 1;
3376         }
3377
3378         /*
3379          * Initialize multiple devices information, or single
3380          * zoned block device information.
3381          */
3382         sbi->devs = f2fs_kzalloc(sbi,
3383                                  array_size(max_devices,
3384                                             sizeof(struct f2fs_dev_info)),
3385                                  GFP_KERNEL);
3386         if (!sbi->devs)
3387                 return -ENOMEM;
3388
3389         for (i = 0; i < max_devices; i++) {
3390
3391                 if (i > 0 && !RDEV(i).path[0])
3392                         break;
3393
3394                 if (max_devices == 1) {
3395                         /* Single zoned block device mount */
3396                         FDEV(0).bdev =
3397                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3398                                         sbi->sb->s_mode, sbi->sb->s_type);
3399                 } else {
3400                         /* Multi-device mount */
3401                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3402                         FDEV(i).total_segments =
3403                                 le32_to_cpu(RDEV(i).total_segments);
3404                         if (i == 0) {
3405                                 FDEV(i).start_blk = 0;
3406                                 FDEV(i).end_blk = FDEV(i).start_blk +
3407                                     (FDEV(i).total_segments <<
3408                                     sbi->log_blocks_per_seg) - 1 +
3409                                     le32_to_cpu(raw_super->segment0_blkaddr);
3410                         } else {
3411                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3412                                 FDEV(i).end_blk = FDEV(i).start_blk +
3413                                         (FDEV(i).total_segments <<
3414                                         sbi->log_blocks_per_seg) - 1;
3415                         }
3416                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3417                                         sbi->sb->s_mode, sbi->sb->s_type);
3418                 }
3419                 if (IS_ERR(FDEV(i).bdev))
3420                         return PTR_ERR(FDEV(i).bdev);
3421
3422                 /* to release errored devices */
3423                 sbi->s_ndevs = i + 1;
3424
3425 #ifdef CONFIG_BLK_DEV_ZONED
3426                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3427                                 !f2fs_sb_has_blkzoned(sbi)) {
3428                         f2fs_err(sbi, "Zoned block device feature not enabled\n");
3429                         return -EINVAL;
3430                 }
3431                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3432                         if (init_blkz_info(sbi, i)) {
3433                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3434                                 return -EINVAL;
3435                         }
3436                         if (max_devices == 1)
3437                                 break;
3438                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3439                                   i, FDEV(i).path,
3440                                   FDEV(i).total_segments,
3441                                   FDEV(i).start_blk, FDEV(i).end_blk,
3442                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3443                                   "Host-aware" : "Host-managed");
3444                         continue;
3445                 }
3446 #endif
3447                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3448                           i, FDEV(i).path,
3449                           FDEV(i).total_segments,
3450                           FDEV(i).start_blk, FDEV(i).end_blk);
3451         }
3452         f2fs_info(sbi,
3453                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3454         return 0;
3455 }
3456
3457 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3458 {
3459 #ifdef CONFIG_UNICODE
3460         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3461                 const struct f2fs_sb_encodings *encoding_info;
3462                 struct unicode_map *encoding;
3463                 __u16 encoding_flags;
3464
3465                 if (f2fs_sb_has_encrypt(sbi)) {
3466                         f2fs_err(sbi,
3467                                 "Can't mount with encoding and encryption");
3468                         return -EINVAL;
3469                 }
3470
3471                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3472                                           &encoding_flags)) {
3473                         f2fs_err(sbi,
3474                                  "Encoding requested by superblock is unknown");
3475                         return -EINVAL;
3476                 }
3477
3478                 encoding = utf8_load(encoding_info->version);
3479                 if (IS_ERR(encoding)) {
3480                         f2fs_err(sbi,
3481                                  "can't mount with superblock charset: %s-%s "
3482                                  "not supported by the kernel. flags: 0x%x.",
3483                                  encoding_info->name, encoding_info->version,
3484                                  encoding_flags);
3485                         return PTR_ERR(encoding);
3486                 }
3487                 f2fs_info(sbi, "Using encoding defined by superblock: "
3488                          "%s-%s with flags 0x%hx", encoding_info->name,
3489                          encoding_info->version?:"\b", encoding_flags);
3490
3491                 sbi->sb->s_encoding = encoding;
3492                 sbi->sb->s_encoding_flags = encoding_flags;
3493                 sbi->sb->s_d_op = &f2fs_dentry_ops;
3494         }
3495 #else
3496         if (f2fs_sb_has_casefold(sbi)) {
3497                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3498                 return -EINVAL;
3499         }
3500 #endif
3501         return 0;
3502 }
3503
3504 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3505 {
3506         struct f2fs_sm_info *sm_i = SM_I(sbi);
3507
3508         /* adjust parameters according to the volume size */
3509         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3510                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3511                 sm_i->dcc_info->discard_granularity = 1;
3512                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3513         }
3514
3515         sbi->readdir_ra = 1;
3516 }
3517
3518 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3519 {
3520         struct f2fs_sb_info *sbi;
3521         struct f2fs_super_block *raw_super;
3522         struct inode *root;
3523         int err;
3524         bool skip_recovery = false, need_fsck = false;
3525         char *options = NULL;
3526         int recovery, i, valid_super_block;
3527         struct curseg_info *seg_i;
3528         int retry_cnt = 1;
3529
3530 try_onemore:
3531         err = -EINVAL;
3532         raw_super = NULL;
3533         valid_super_block = -1;
3534         recovery = 0;
3535
3536         /* allocate memory for f2fs-specific super block info */
3537         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3538         if (!sbi)
3539                 return -ENOMEM;
3540
3541         sbi->sb = sb;
3542
3543         /* Load the checksum driver */
3544         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3545         if (IS_ERR(sbi->s_chksum_driver)) {
3546                 f2fs_err(sbi, "Cannot load crc32 driver.");
3547                 err = PTR_ERR(sbi->s_chksum_driver);
3548                 sbi->s_chksum_driver = NULL;
3549                 goto free_sbi;
3550         }
3551
3552         /* set a block size */
3553         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3554                 f2fs_err(sbi, "unable to set blocksize");
3555                 goto free_sbi;
3556         }
3557
3558         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3559                                                                 &recovery);
3560         if (err)
3561                 goto free_sbi;
3562
3563         sb->s_fs_info = sbi;
3564         sbi->raw_super = raw_super;
3565
3566         /* precompute checksum seed for metadata */
3567         if (f2fs_sb_has_inode_chksum(sbi))
3568                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3569                                                 sizeof(raw_super->uuid));
3570
3571         default_options(sbi);
3572         /* parse mount options */
3573         options = kstrdup((const char *)data, GFP_KERNEL);
3574         if (data && !options) {
3575                 err = -ENOMEM;
3576                 goto free_sb_buf;
3577         }
3578
3579         err = parse_options(sb, options, false);
3580         if (err)
3581                 goto free_options;
3582
3583         sbi->max_file_blocks = max_file_blocks();
3584         sb->s_maxbytes = sbi->max_file_blocks <<
3585                                 le32_to_cpu(raw_super->log_blocksize);
3586         sb->s_max_links = F2FS_LINK_MAX;
3587
3588         err = f2fs_setup_casefold(sbi);
3589         if (err)
3590                 goto free_options;
3591
3592 #ifdef CONFIG_QUOTA
3593         sb->dq_op = &f2fs_quota_operations;
3594         sb->s_qcop = &f2fs_quotactl_ops;
3595         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3596
3597         if (f2fs_sb_has_quota_ino(sbi)) {
3598                 for (i = 0; i < MAXQUOTAS; i++) {
3599                         if (f2fs_qf_ino(sbi->sb, i))
3600                                 sbi->nquota_files++;
3601                 }
3602         }
3603 #endif
3604
3605         sb->s_op = &f2fs_sops;
3606 #ifdef CONFIG_FS_ENCRYPTION
3607         sb->s_cop = &f2fs_cryptops;
3608 #endif
3609 #ifdef CONFIG_FS_VERITY
3610         sb->s_vop = &f2fs_verityops;
3611 #endif
3612         sb->s_xattr = f2fs_xattr_handlers;
3613         sb->s_export_op = &f2fs_export_ops;
3614         sb->s_magic = F2FS_SUPER_MAGIC;
3615         sb->s_time_gran = 1;
3616         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3617                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3618         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3619         sb->s_iflags |= SB_I_CGROUPWB;
3620
3621         /* init f2fs-specific super block info */
3622         sbi->valid_super_block = valid_super_block;
3623         init_rwsem(&sbi->gc_lock);
3624         mutex_init(&sbi->writepages);
3625         mutex_init(&sbi->cp_mutex);
3626         init_rwsem(&sbi->node_write);
3627         init_rwsem(&sbi->node_change);
3628
3629         /* disallow all the data/node/meta page writes */
3630         set_sbi_flag(sbi, SBI_POR_DOING);
3631         spin_lock_init(&sbi->stat_lock);
3632
3633         /* init iostat info */
3634         spin_lock_init(&sbi->iostat_lock);
3635         sbi->iostat_enable = false;
3636         sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
3637
3638         for (i = 0; i < NR_PAGE_TYPE; i++) {
3639                 int n = (i == META) ? 1: NR_TEMP_TYPE;
3640                 int j;
3641
3642                 sbi->write_io[i] =
3643                         f2fs_kmalloc(sbi,
3644                                      array_size(n,
3645                                                 sizeof(struct f2fs_bio_info)),
3646                                      GFP_KERNEL);
3647                 if (!sbi->write_io[i]) {
3648                         err = -ENOMEM;
3649                         goto free_bio_info;
3650                 }
3651
3652                 for (j = HOT; j < n; j++) {
3653                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
3654                         sbi->write_io[i][j].sbi = sbi;
3655                         sbi->write_io[i][j].bio = NULL;
3656                         spin_lock_init(&sbi->write_io[i][j].io_lock);
3657                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3658                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3659                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3660                 }
3661         }
3662
3663         init_rwsem(&sbi->cp_rwsem);
3664         init_rwsem(&sbi->quota_sem);
3665         init_waitqueue_head(&sbi->cp_wait);
3666         init_sb_info(sbi);
3667
3668         err = init_percpu_info(sbi);
3669         if (err)
3670                 goto free_bio_info;
3671
3672         if (F2FS_IO_ALIGNED(sbi)) {
3673                 sbi->write_io_dummy =
3674                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3675                 if (!sbi->write_io_dummy) {
3676                         err = -ENOMEM;
3677                         goto free_percpu;
3678                 }
3679         }
3680
3681         /* init per sbi slab cache */
3682         err = f2fs_init_xattr_caches(sbi);
3683         if (err)
3684                 goto free_io_dummy;
3685         err = f2fs_init_page_array_cache(sbi);
3686         if (err)
3687                 goto free_xattr_cache;
3688
3689         /* get an inode for meta space */
3690         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3691         if (IS_ERR(sbi->meta_inode)) {
3692                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3693                 err = PTR_ERR(sbi->meta_inode);
3694                 goto free_page_array_cache;
3695         }
3696
3697         err = f2fs_get_valid_checkpoint(sbi);
3698         if (err) {
3699                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3700                 goto free_meta_inode;
3701         }
3702
3703         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3704                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3705         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3706                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3707                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3708         }
3709
3710         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3711                 set_sbi_flag(sbi, SBI_NEED_FSCK);
3712
3713         /* Initialize device list */
3714         err = f2fs_scan_devices(sbi);
3715         if (err) {
3716                 f2fs_err(sbi, "Failed to find devices");
3717                 goto free_devices;
3718         }
3719
3720         err = f2fs_init_post_read_wq(sbi);
3721         if (err) {
3722                 f2fs_err(sbi, "Failed to initialize post read workqueue");
3723                 goto free_devices;
3724         }
3725
3726         sbi->total_valid_node_count =
3727                                 le32_to_cpu(sbi->ckpt->valid_node_count);
3728         percpu_counter_set(&sbi->total_valid_inode_count,
3729                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
3730         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3731         sbi->total_valid_block_count =
3732                                 le64_to_cpu(sbi->ckpt->valid_block_count);
3733         sbi->last_valid_block_count = sbi->total_valid_block_count;
3734         sbi->reserved_blocks = 0;
3735         sbi->current_reserved_blocks = 0;
3736         limit_reserve_root(sbi);
3737         adjust_unusable_cap_perc(sbi);
3738
3739         for (i = 0; i < NR_INODE_TYPE; i++) {
3740                 INIT_LIST_HEAD(&sbi->inode_list[i]);
3741                 spin_lock_init(&sbi->inode_lock[i]);
3742         }
3743         mutex_init(&sbi->flush_lock);
3744
3745         f2fs_init_extent_cache_info(sbi);
3746
3747         f2fs_init_ino_entry_info(sbi);
3748
3749         f2fs_init_fsync_node_info(sbi);
3750
3751         /* setup f2fs internal modules */
3752         err = f2fs_build_segment_manager(sbi);
3753         if (err) {
3754                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
3755                          err);
3756                 goto free_sm;
3757         }
3758         err = f2fs_build_node_manager(sbi);
3759         if (err) {
3760                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
3761                          err);
3762                 goto free_nm;
3763         }
3764
3765         err = adjust_reserved_segment(sbi);
3766         if (err)
3767                 goto free_nm;
3768
3769         /* For write statistics */
3770         if (sb->s_bdev->bd_part)
3771                 sbi->sectors_written_start =
3772                         (u64)part_stat_read(sb->s_bdev->bd_part,
3773                                             sectors[STAT_WRITE]);
3774
3775         /* Read accumulated write IO statistics if exists */
3776         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3777         if (__exist_node_summaries(sbi))
3778                 sbi->kbytes_written =
3779                         le64_to_cpu(seg_i->journal->info.kbytes_written);
3780
3781         f2fs_build_gc_manager(sbi);
3782
3783         err = f2fs_build_stats(sbi);
3784         if (err)
3785                 goto free_nm;
3786
3787         /* get an inode for node space */
3788         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3789         if (IS_ERR(sbi->node_inode)) {
3790                 f2fs_err(sbi, "Failed to read node inode");
3791                 err = PTR_ERR(sbi->node_inode);
3792                 goto free_stats;
3793         }
3794
3795         /* read root inode and dentry */
3796         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3797         if (IS_ERR(root)) {
3798                 f2fs_err(sbi, "Failed to read root inode");
3799                 err = PTR_ERR(root);
3800                 goto free_node_inode;
3801         }
3802         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3803                         !root->i_size || !root->i_nlink) {
3804                 iput(root);
3805                 err = -EINVAL;
3806                 goto free_node_inode;
3807         }
3808
3809         sb->s_root = d_make_root(root); /* allocate root dentry */
3810         if (!sb->s_root) {
3811                 err = -ENOMEM;
3812                 goto free_node_inode;
3813         }
3814
3815         err = f2fs_register_sysfs(sbi);
3816         if (err)
3817                 goto free_root_inode;
3818
3819 #ifdef CONFIG_QUOTA
3820         /* Enable quota usage during mount */
3821         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3822                 err = f2fs_enable_quotas(sb);
3823                 if (err)
3824                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
3825         }
3826 #endif
3827         /* if there are any orphan inodes, free them */
3828         err = f2fs_recover_orphan_inodes(sbi);
3829         if (err)
3830                 goto free_meta;
3831
3832         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3833                 goto reset_checkpoint;
3834
3835         /* recover fsynced data */
3836         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
3837                         !test_opt(sbi, NORECOVERY)) {
3838                 /*
3839                  * mount should be failed, when device has readonly mode, and
3840                  * previous checkpoint was not done by clean system shutdown.
3841                  */
3842                 if (f2fs_hw_is_readonly(sbi)) {
3843                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3844                                 err = -EROFS;
3845                                 f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
3846                                 goto free_meta;
3847                         }
3848                         f2fs_info(sbi, "write access unavailable, skipping recovery");
3849                         goto reset_checkpoint;
3850                 }
3851
3852                 if (need_fsck)
3853                         set_sbi_flag(sbi, SBI_NEED_FSCK);
3854
3855                 if (skip_recovery)
3856                         goto reset_checkpoint;
3857
3858                 err = f2fs_recover_fsync_data(sbi, false);
3859                 if (err < 0) {
3860                         if (err != -ENOMEM)
3861                                 skip_recovery = true;
3862                         need_fsck = true;
3863                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
3864                                  err);
3865                         goto free_meta;
3866                 }
3867         } else {
3868                 err = f2fs_recover_fsync_data(sbi, true);
3869
3870                 if (!f2fs_readonly(sb) && err > 0) {
3871                         err = -EINVAL;
3872                         f2fs_err(sbi, "Need to recover fsync data");
3873                         goto free_meta;
3874                 }
3875         }
3876
3877         /*
3878          * If the f2fs is not readonly and fsync data recovery succeeds,
3879          * check zoned block devices' write pointer consistency.
3880          */
3881         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
3882                 err = f2fs_check_write_pointer(sbi);
3883                 if (err)
3884                         goto free_meta;
3885         }
3886
3887 reset_checkpoint:
3888         f2fs_init_inmem_curseg(sbi);
3889
3890         /* f2fs_recover_fsync_data() cleared this already */
3891         clear_sbi_flag(sbi, SBI_POR_DOING);
3892
3893         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3894                 err = f2fs_disable_checkpoint(sbi);
3895                 if (err)
3896                         goto sync_free_meta;
3897         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3898                 f2fs_enable_checkpoint(sbi);
3899         }
3900
3901         /*
3902          * If filesystem is not mounted as read-only then
3903          * do start the gc_thread.
3904          */
3905         if (F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF && !f2fs_readonly(sb)) {
3906                 /* After POR, we can run background GC thread.*/
3907                 err = f2fs_start_gc_thread(sbi);
3908                 if (err)
3909                         goto sync_free_meta;
3910         }
3911         kvfree(options);
3912
3913         /* recover broken superblock */
3914         if (recovery) {
3915                 err = f2fs_commit_super(sbi, true);
3916                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
3917                           sbi->valid_super_block ? 1 : 2, err);
3918         }
3919
3920         f2fs_join_shrinker(sbi);
3921
3922         f2fs_tuning_parameters(sbi);
3923
3924         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
3925                     cur_cp_version(F2FS_CKPT(sbi)));
3926         f2fs_update_time(sbi, CP_TIME);
3927         f2fs_update_time(sbi, REQ_TIME);
3928         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3929         return 0;
3930
3931 sync_free_meta:
3932         /* safe to flush all the data */
3933         sync_filesystem(sbi->sb);
3934         retry_cnt = 0;
3935
3936 free_meta:
3937 #ifdef CONFIG_QUOTA
3938         f2fs_truncate_quota_inode_pages(sb);
3939         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
3940                 f2fs_quota_off_umount(sbi->sb);
3941 #endif
3942         /*
3943          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
3944          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
3945          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
3946          * falls into an infinite loop in f2fs_sync_meta_pages().
3947          */
3948         truncate_inode_pages_final(META_MAPPING(sbi));
3949         /* evict some inodes being cached by GC */
3950         evict_inodes(sb);
3951         f2fs_unregister_sysfs(sbi);
3952 free_root_inode:
3953         dput(sb->s_root);
3954         sb->s_root = NULL;
3955 free_node_inode:
3956         f2fs_release_ino_entry(sbi, true);
3957         truncate_inode_pages_final(NODE_MAPPING(sbi));
3958         iput(sbi->node_inode);
3959         sbi->node_inode = NULL;
3960 free_stats:
3961         f2fs_destroy_stats(sbi);
3962 free_nm:
3963         f2fs_destroy_node_manager(sbi);
3964 free_sm:
3965         f2fs_destroy_segment_manager(sbi);
3966         f2fs_destroy_post_read_wq(sbi);
3967 free_devices:
3968         destroy_device_list(sbi);
3969         kvfree(sbi->ckpt);
3970 free_meta_inode:
3971         make_bad_inode(sbi->meta_inode);
3972         iput(sbi->meta_inode);
3973         sbi->meta_inode = NULL;
3974 free_page_array_cache:
3975         f2fs_destroy_page_array_cache(sbi);
3976 free_xattr_cache:
3977         f2fs_destroy_xattr_caches(sbi);
3978 free_io_dummy:
3979         mempool_destroy(sbi->write_io_dummy);
3980 free_percpu:
3981         destroy_percpu_info(sbi);
3982 free_bio_info:
3983         for (i = 0; i < NR_PAGE_TYPE; i++)
3984                 kvfree(sbi->write_io[i]);
3985
3986 #ifdef CONFIG_UNICODE
3987         utf8_unload(sb->s_encoding);
3988         sb->s_encoding = NULL;
3989 #endif
3990 free_options:
3991 #ifdef CONFIG_QUOTA
3992         for (i = 0; i < MAXQUOTAS; i++)
3993                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
3994 #endif
3995         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
3996         kvfree(options);
3997 free_sb_buf:
3998         kfree(raw_super);
3999 free_sbi:
4000         if (sbi->s_chksum_driver)
4001                 crypto_free_shash(sbi->s_chksum_driver);
4002         kfree(sbi);
4003
4004         /* give only one another chance */
4005         if (retry_cnt > 0 && skip_recovery) {
4006                 retry_cnt--;
4007                 shrink_dcache_sb(sb);
4008                 goto try_onemore;
4009         }
4010         return err;
4011 }
4012
4013 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4014                         const char *dev_name, void *data)
4015 {
4016         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4017 }
4018
4019 static void kill_f2fs_super(struct super_block *sb)
4020 {
4021         if (sb->s_root) {
4022                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4023
4024                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4025                 f2fs_stop_gc_thread(sbi);
4026                 f2fs_stop_discard_thread(sbi);
4027
4028                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4029                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4030                         struct cp_control cpc = {
4031                                 .reason = CP_UMOUNT,
4032                         };
4033                         f2fs_write_checkpoint(sbi, &cpc);
4034                 }
4035
4036                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4037                         sb->s_flags &= ~SB_RDONLY;
4038         }
4039         kill_block_super(sb);
4040 }
4041
4042 static struct file_system_type f2fs_fs_type = {
4043         .owner          = THIS_MODULE,
4044         .name           = "f2fs",
4045         .mount          = f2fs_mount,
4046         .kill_sb        = kill_f2fs_super,
4047         .fs_flags       = FS_REQUIRES_DEV,
4048 };
4049 MODULE_ALIAS_FS("f2fs");
4050
4051 static int __init init_inodecache(void)
4052 {
4053         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4054                         sizeof(struct f2fs_inode_info), 0,
4055                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4056         if (!f2fs_inode_cachep)
4057                 return -ENOMEM;
4058         return 0;
4059 }
4060
4061 static void destroy_inodecache(void)
4062 {
4063         /*
4064          * Make sure all delayed rcu free inodes are flushed before we
4065          * destroy cache.
4066          */
4067         rcu_barrier();
4068         kmem_cache_destroy(f2fs_inode_cachep);
4069 }
4070
4071 static int __init init_f2fs_fs(void)
4072 {
4073         int err;
4074
4075         if (PAGE_SIZE != F2FS_BLKSIZE) {
4076                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4077                                 PAGE_SIZE, F2FS_BLKSIZE);
4078                 return -EINVAL;
4079         }
4080
4081         f2fs_build_trace_ios();
4082
4083         err = init_inodecache();
4084         if (err)
4085                 goto fail;
4086         err = f2fs_create_node_manager_caches();
4087         if (err)
4088                 goto free_inodecache;
4089         err = f2fs_create_segment_manager_caches();
4090         if (err)
4091                 goto free_node_manager_caches;
4092         err = f2fs_create_checkpoint_caches();
4093         if (err)
4094                 goto free_segment_manager_caches;
4095         err = f2fs_create_recovery_cache();
4096         if (err)
4097                 goto free_checkpoint_caches;
4098         err = f2fs_create_extent_cache();
4099         if (err)
4100                 goto free_recovery_cache;
4101         err = f2fs_create_garbage_collection_cache();
4102         if (err)
4103                 goto free_extent_cache;
4104         err = f2fs_init_sysfs();
4105         if (err)
4106                 goto free_garbage_collection_cache;
4107         err = register_shrinker(&f2fs_shrinker_info);
4108         if (err)
4109                 goto free_sysfs;
4110         err = register_filesystem(&f2fs_fs_type);
4111         if (err)
4112                 goto free_shrinker;
4113         f2fs_create_root_stats();
4114         err = f2fs_init_post_read_processing();
4115         if (err)
4116                 goto free_root_stats;
4117         err = f2fs_init_bio_entry_cache();
4118         if (err)
4119                 goto free_post_read;
4120         err = f2fs_init_bioset();
4121         if (err)
4122                 goto free_bio_enrty_cache;
4123         err = f2fs_init_compress_mempool();
4124         if (err)
4125                 goto free_bioset;
4126         err = f2fs_init_compress_cache();
4127         if (err)
4128                 goto free_compress_mempool;
4129         return 0;
4130 free_compress_mempool:
4131         f2fs_destroy_compress_mempool();
4132 free_bioset:
4133         f2fs_destroy_bioset();
4134 free_bio_enrty_cache:
4135         f2fs_destroy_bio_entry_cache();
4136 free_post_read:
4137         f2fs_destroy_post_read_processing();
4138 free_root_stats:
4139         f2fs_destroy_root_stats();
4140         unregister_filesystem(&f2fs_fs_type);
4141 free_shrinker:
4142         unregister_shrinker(&f2fs_shrinker_info);
4143 free_sysfs:
4144         f2fs_exit_sysfs();
4145 free_garbage_collection_cache:
4146         f2fs_destroy_garbage_collection_cache();
4147 free_extent_cache:
4148         f2fs_destroy_extent_cache();
4149 free_recovery_cache:
4150         f2fs_destroy_recovery_cache();
4151 free_checkpoint_caches:
4152         f2fs_destroy_checkpoint_caches();
4153 free_segment_manager_caches:
4154         f2fs_destroy_segment_manager_caches();
4155 free_node_manager_caches:
4156         f2fs_destroy_node_manager_caches();
4157 free_inodecache:
4158         destroy_inodecache();
4159 fail:
4160         return err;
4161 }
4162
4163 static void __exit exit_f2fs_fs(void)
4164 {
4165         f2fs_destroy_compress_cache();
4166         f2fs_destroy_compress_mempool();
4167         f2fs_destroy_bioset();
4168         f2fs_destroy_bio_entry_cache();
4169         f2fs_destroy_post_read_processing();
4170         f2fs_destroy_root_stats();
4171         unregister_filesystem(&f2fs_fs_type);
4172         unregister_shrinker(&f2fs_shrinker_info);
4173         f2fs_exit_sysfs();
4174         f2fs_destroy_garbage_collection_cache();
4175         f2fs_destroy_extent_cache();
4176         f2fs_destroy_recovery_cache();
4177         f2fs_destroy_checkpoint_caches();
4178         f2fs_destroy_segment_manager_caches();
4179         f2fs_destroy_node_manager_caches();
4180         destroy_inodecache();
4181         f2fs_destroy_trace_ios();
4182 }
4183
4184 module_init(init_f2fs_fs)
4185 module_exit(exit_f2fs_fs)
4186
4187 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4188 MODULE_DESCRIPTION("Flash Friendly File System");
4189 MODULE_LICENSE("GPL");
4190 MODULE_SOFTDEP("pre: crc32");
4191