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 << 1) / 1000,
 271                         sbi->user_block_count - sbi->reserved_blocks);
 272
 273         /* limit is 0.2% */
 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 void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 293 {
 294         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 295                 return;
 296
 297         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 298                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 299         else
 300                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 301                                         F2FS_OPTION(sbi).unusable_cap_perc;
 302
 303         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 304                         F2FS_OPTION(sbi).unusable_cap,
 305                         F2FS_OPTION(sbi).unusable_cap_perc);
 306 }
 307
 308 static void init_once(void *foo)
 309 {
 310         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 311
 312         inode_init_once(&fi->vfs_inode);
 313 }
 314
 315 #ifdef CONFIG_QUOTA
 316 static const char * const quotatypes[] = INITQFNAMES;
 317 #define QTYPE2NAME(t) (quotatypes[t])
 318 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 319                                                         substring_t *args)
 320 {
 321         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 322         char *qname;
 323         int ret = -EINVAL;
 324
 325         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 326                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 327                 return -EINVAL;
 328         }
 329         if (f2fs_sb_has_quota_ino(sbi)) {
 330                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 331                 return 0;
 332         }
 333
 334         qname = match_strdup(args);
 335         if (!qname) {
 336                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 337                 return -ENOMEM;
 338         }
 339         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 340                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 341                         ret = 0;
 342                 else
 343                         f2fs_err(sbi, "%s quota file already specified",
 344                                  QTYPE2NAME(qtype));
 345                 goto errout;
 346         }
 347         if (strchr(qname, '/')) {
 348                 f2fs_err(sbi, "quotafile must be on filesystem root");
 349                 goto errout;
 350         }
 351         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 352         set_opt(sbi, QUOTA);
 353         return 0;
 354 errout:
 355         kfree(qname);
 356         return ret;
 357 }
 358
 359 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 360 {
 361         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 362
 363         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 364                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 365                 return -EINVAL;
 366         }
 367         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 368         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 369         return 0;
 370 }
 371
 372 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 373 {
 374         /*
 375          * We do the test below only for project quotas. 'usrquota' and
 376          * 'grpquota' mount options are allowed even without quota feature
 377          * to support legacy quotas in quota files.
 378          */
 379         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 380                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 381                 return -1;
 382         }
 383         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 384                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 385                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 386                 if (test_opt(sbi, USRQUOTA) &&
 387                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 388                         clear_opt(sbi, USRQUOTA);
 389
 390                 if (test_opt(sbi, GRPQUOTA) &&
 391                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 392                         clear_opt(sbi, GRPQUOTA);
 393
 394                 if (test_opt(sbi, PRJQUOTA) &&
 395                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 396                         clear_opt(sbi, PRJQUOTA);
 397
 398                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 399                                 test_opt(sbi, PRJQUOTA)) {
 400                         f2fs_err(sbi, "old and new quota format mixing");
 401                         return -1;
 402                 }
 403
 404                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 405                         f2fs_err(sbi, "journaled quota format not specified");
 406                         return -1;
 407                 }
 408         }
 409
 410         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 411                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 412                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 413         }
 414         return 0;
 415 }
 416 #endif
 417
 418 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 419                                           const char *opt,
 420                                           const substring_t *arg,
 421                                           bool is_remount)
 422 {
 423         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 424 #ifdef CONFIG_FS_ENCRYPTION
 425         int err;
 426
 427         if (!f2fs_sb_has_encrypt(sbi)) {
 428                 f2fs_err(sbi, "Encrypt feature is off");
 429                 return -EINVAL;
 430         }
 431
 432         /*
 433          * This mount option is just for testing, and it's not worthwhile to
 434          * implement the extra complexity (e.g. RCU protection) that would be
 435          * needed to allow it to be set or changed during remount.  We do allow
 436          * it to be specified during remount, but only if there is no change.
 437          */
 438         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 439                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 440                 return -EINVAL;
 441         }
 442         err = fscrypt_set_test_dummy_encryption(
 443                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 444         if (err) {
 445                 if (err == -EEXIST)
 446                         f2fs_warn(sbi,
 447                                   "Can't change test_dummy_encryption on remount");
 448                 else if (err == -EINVAL)
 449                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 450                                   opt);
 451                 else
 452                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 453                                   opt, err);
 454                 return -EINVAL;
 455         }
 456         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 457 #else
 458         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 459 #endif
 460         return 0;
 461 }
 462
 463 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 464 {
 465         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 466         substring_t args[MAX_OPT_ARGS];
 467 #ifdef CONFIG_F2FS_FS_COMPRESSION
 468         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 469         int ext_cnt;
 470 #endif
 471         char *p, *name;
 472         int arg = 0;
 473         kuid_t uid;
 474         kgid_t gid;
 475         int ret;
 476
 477         if (!options)
 478                 return 0;
 479
 480         while ((p = strsep(&options, ",")) != NULL) {
 481                 int token;
 482                 if (!*p)
 483                         continue;
 484                 /*
 485                  * Initialize args struct so we know whether arg was
 486                  * found; some options take optional arguments.
 487                  */
 488                 args[0].to = args[0].from = NULL;
 489                 token = match_token(p, f2fs_tokens, args);
 490
 491                 switch (token) {
 492                 case Opt_gc_background:
 493                         name = match_strdup(&args[0]);
 494
 495                         if (!name)
 496                                 return -ENOMEM;
 497                         if (!strcmp(name, "on")) {
 498                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 499                         } else if (!strcmp(name, "off")) {
 500                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 501                         } else if (!strcmp(name, "sync")) {
 502                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 503                         } else {
 504                                 kfree(name);
 505                                 return -EINVAL;
 506                         }
 507                         kfree(name);
 508                         break;
 509                 case Opt_disable_roll_forward:
 510                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 511                         break;
 512                 case Opt_norecovery:
 513                         /* this option mounts f2fs with ro */
 514                         set_opt(sbi, NORECOVERY);
 515                         if (!f2fs_readonly(sb))
 516                                 return -EINVAL;
 517                         break;
 518                 case Opt_discard:
 519                         set_opt(sbi, DISCARD);
 520                         break;
 521                 case Opt_nodiscard:
 522                         if (f2fs_sb_has_blkzoned(sbi)) {
 523                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 524                                 return -EINVAL;
 525                         }
 526                         clear_opt(sbi, DISCARD);
 527                         break;
 528                 case Opt_noheap:
 529                         set_opt(sbi, NOHEAP);
 530                         break;
 531                 case Opt_heap:
 532                         clear_opt(sbi, NOHEAP);
 533                         break;
 534 #ifdef CONFIG_F2FS_FS_XATTR
 535                 case Opt_user_xattr:
 536                         set_opt(sbi, XATTR_USER);
 537                         break;
 538                 case Opt_nouser_xattr:
 539                         clear_opt(sbi, XATTR_USER);
 540                         break;
 541                 case Opt_inline_xattr:
 542                         set_opt(sbi, INLINE_XATTR);
 543                         break;
 544                 case Opt_noinline_xattr:
 545                         clear_opt(sbi, INLINE_XATTR);
 546                         break;
 547                 case Opt_inline_xattr_size:
 548                         if (args->from && match_int(args, &arg))
 549                                 return -EINVAL;
 550                         set_opt(sbi, INLINE_XATTR_SIZE);
 551                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 552                         break;
 553 #else
 554                 case Opt_user_xattr:
 555                         f2fs_info(sbi, "user_xattr options not supported");
 556                         break;
 557                 case Opt_nouser_xattr:
 558                         f2fs_info(sbi, "nouser_xattr options not supported");
 559                         break;
 560                 case Opt_inline_xattr:
 561                         f2fs_info(sbi, "inline_xattr options not supported");
 562                         break;
 563                 case Opt_noinline_xattr:
 564                         f2fs_info(sbi, "noinline_xattr options not supported");
 565                         break;
 566 #endif
 567 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 568                 case Opt_acl:
 569                         set_opt(sbi, POSIX_ACL);
 570                         break;
 571                 case Opt_noacl:
 572                         clear_opt(sbi, POSIX_ACL);
 573                         break;
 574 #else
 575                 case Opt_acl:
 576                         f2fs_info(sbi, "acl options not supported");
 577                         break;
 578                 case Opt_noacl:
 579                         f2fs_info(sbi, "noacl options not supported");
 580                         break;
 581 #endif
 582                 case Opt_active_logs:
 583                         if (args->from && match_int(args, &arg))
 584                                 return -EINVAL;
 585                         if (arg != 2 && arg != 4 &&
 586                                 arg != NR_CURSEG_PERSIST_TYPE)
 587                                 return -EINVAL;
 588                         F2FS_OPTION(sbi).active_logs = arg;
 589                         break;
 590                 case Opt_disable_ext_identify:
 591                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 592                         break;
 593                 case Opt_inline_data:
 594                         set_opt(sbi, INLINE_DATA);
 595                         break;
 596                 case Opt_inline_dentry:
 597                         set_opt(sbi, INLINE_DENTRY);
 598                         break;
 599                 case Opt_noinline_dentry:
 600                         clear_opt(sbi, INLINE_DENTRY);
 601                         break;
 602                 case Opt_flush_merge:
 603                         set_opt(sbi, FLUSH_MERGE);
 604                         break;
 605                 case Opt_noflush_merge:
 606                         clear_opt(sbi, FLUSH_MERGE);
 607                         break;
 608                 case Opt_nobarrier:
 609                         set_opt(sbi, NOBARRIER);
 610                         break;
 611                 case Opt_fastboot:
 612                         set_opt(sbi, FASTBOOT);
 613                         break;
 614                 case Opt_extent_cache:
 615                         set_opt(sbi, EXTENT_CACHE);
 616                         break;
 617                 case Opt_noextent_cache:
 618                         clear_opt(sbi, EXTENT_CACHE);
 619                         break;
 620                 case Opt_noinline_data:
 621                         clear_opt(sbi, INLINE_DATA);
 622                         break;
 623                 case Opt_data_flush:
 624                         set_opt(sbi, DATA_FLUSH);
 625                         break;
 626                 case Opt_reserve_root:
 627                         if (args->from && match_int(args, &arg))
 628                                 return -EINVAL;
 629                         if (test_opt(sbi, RESERVE_ROOT)) {
 630                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 631                                           F2FS_OPTION(sbi).root_reserved_blocks);
 632                         } else {
 633                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 634                                 set_opt(sbi, RESERVE_ROOT);
 635                         }
 636                         break;
 637                 case Opt_resuid:
 638                         if (args->from && match_int(args, &arg))
 639                                 return -EINVAL;
 640                         uid = make_kuid(current_user_ns(), arg);
 641                         if (!uid_valid(uid)) {
 642                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 643                                 return -EINVAL;
 644                         }
 645                         F2FS_OPTION(sbi).s_resuid = uid;
 646                         break;
 647                 case Opt_resgid:
 648                         if (args->from && match_int(args, &arg))
 649                                 return -EINVAL;
 650                         gid = make_kgid(current_user_ns(), arg);
 651                         if (!gid_valid(gid)) {
 652                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 653                                 return -EINVAL;
 654                         }
 655                         F2FS_OPTION(sbi).s_resgid = gid;
 656                         break;
 657                 case Opt_mode:
 658                         name = match_strdup(&args[0]);
 659
 660                         if (!name)
 661                                 return -ENOMEM;
 662                         if (!strcmp(name, "adaptive")) {
 663                                 if (f2fs_sb_has_blkzoned(sbi)) {
 664                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 665                                         kfree(name);
 666                                         return -EINVAL;
 667                                 }
 668                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 669                         } else if (!strcmp(name, "lfs")) {
 670                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 671                         } else {
 672                                 kfree(name);
 673                                 return -EINVAL;
 674                         }
 675                         kfree(name);
 676                         break;
 677                 case Opt_io_size_bits:
 678                         if (args->from && match_int(args, &arg))
 679                                 return -EINVAL;
 680                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
 681                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 682                                           1 << arg, BIO_MAX_PAGES);
 683                                 return -EINVAL;
 684                         }
 685                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 686                         break;
 687 #ifdef CONFIG_F2FS_FAULT_INJECTION
 688                 case Opt_fault_injection:
 689                         if (args->from && match_int(args, &arg))
 690                                 return -EINVAL;
 691                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 692                         set_opt(sbi, FAULT_INJECTION);
 693                         break;
 694
 695                 case Opt_fault_type:
 696                         if (args->from && match_int(args, &arg))
 697                                 return -EINVAL;
 698                         f2fs_build_fault_attr(sbi, 0, arg);
 699                         set_opt(sbi, FAULT_INJECTION);
 700                         break;
 701 #else
 702                 case Opt_fault_injection:
 703                         f2fs_info(sbi, "fault_injection options not supported");
 704                         break;
 705
 706                 case Opt_fault_type:
 707                         f2fs_info(sbi, "fault_type options not supported");
 708                         break;
 709 #endif
 710                 case Opt_lazytime:
 711                         sb->s_flags |= SB_LAZYTIME;
 712                         break;
 713                 case Opt_nolazytime:
 714                         sb->s_flags &= ~SB_LAZYTIME;
 715                         break;
 716 #ifdef CONFIG_QUOTA
 717                 case Opt_quota:
 718                 case Opt_usrquota:
 719                         set_opt(sbi, USRQUOTA);
 720                         break;
 721                 case Opt_grpquota:
 722                         set_opt(sbi, GRPQUOTA);
 723                         break;
 724                 case Opt_prjquota:
 725                         set_opt(sbi, PRJQUOTA);
 726                         break;
 727                 case Opt_usrjquota:
 728                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 729                         if (ret)
 730                                 return ret;
 731                         break;
 732                 case Opt_grpjquota:
 733                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 734                         if (ret)
 735                                 return ret;
 736                         break;
 737                 case Opt_prjjquota:
 738                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 739                         if (ret)
 740                                 return ret;
 741                         break;
 742                 case Opt_offusrjquota:
 743                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 744                         if (ret)
 745                                 return ret;
 746                         break;
 747                 case Opt_offgrpjquota:
 748                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 749                         if (ret)
 750                                 return ret;
 751                         break;
 752                 case Opt_offprjjquota:
 753                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 754                         if (ret)
 755                                 return ret;
 756                         break;
 757                 case Opt_jqfmt_vfsold:
 758                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 759                         break;
 760                 case Opt_jqfmt_vfsv0:
 761                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 762                         break;
 763                 case Opt_jqfmt_vfsv1:
 764                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 765                         break;
 766                 case Opt_noquota:
 767                         clear_opt(sbi, QUOTA);
 768                         clear_opt(sbi, USRQUOTA);
 769                         clear_opt(sbi, GRPQUOTA);
 770                         clear_opt(sbi, PRJQUOTA);
 771                         break;
 772 #else
 773                 case Opt_quota:
 774                 case Opt_usrquota:
 775                 case Opt_grpquota:
 776                 case Opt_prjquota:
 777                 case Opt_usrjquota:
 778                 case Opt_grpjquota:
 779                 case Opt_prjjquota:
 780                 case Opt_offusrjquota:
 781                 case Opt_offgrpjquota:
 782                 case Opt_offprjjquota:
 783                 case Opt_jqfmt_vfsold:
 784                 case Opt_jqfmt_vfsv0:
 785                 case Opt_jqfmt_vfsv1:
 786                 case Opt_noquota:
 787                         f2fs_info(sbi, "quota operations not supported");
 788                         break;
 789 #endif
 790                 case Opt_whint:
 791                         name = match_strdup(&args[0]);
 792                         if (!name)
 793                                 return -ENOMEM;
 794                         if (!strcmp(name, "user-based")) {
 795                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 796                         } else if (!strcmp(name, "off")) {
 797                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 798                         } else if (!strcmp(name, "fs-based")) {
 799                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 800                         } else {
 801                                 kfree(name);
 802                                 return -EINVAL;
 803                         }
 804                         kfree(name);
 805                         break;
 806                 case Opt_alloc:
 807                         name = match_strdup(&args[0]);
 808                         if (!name)
 809                                 return -ENOMEM;
 810
 811                         if (!strcmp(name, "default")) {
 812                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 813                         } else if (!strcmp(name, "reuse")) {
 814                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 815                         } else {
 816                                 kfree(name);
 817                                 return -EINVAL;
 818                         }
 819                         kfree(name);
 820                         break;
 821                 case Opt_fsync:
 822                         name = match_strdup(&args[0]);
 823                         if (!name)
 824                                 return -ENOMEM;
 825                         if (!strcmp(name, "posix")) {
 826                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 827                         } else if (!strcmp(name, "strict")) {
 828                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 829                         } else if (!strcmp(name, "nobarrier")) {
 830                                 F2FS_OPTION(sbi).fsync_mode =
 831                                                         FSYNC_MODE_NOBARRIER;
 832                         } else {
 833                                 kfree(name);
 834                                 return -EINVAL;
 835                         }
 836                         kfree(name);
 837                         break;
 838                 case Opt_test_dummy_encryption:
 839                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 840                                                              is_remount);
 841                         if (ret)
 842                                 return ret;
 843                         break;
 844                 case Opt_inlinecrypt:
 845 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
 846                         sb->s_flags |= SB_INLINECRYPT;
 847 #else
 848                         f2fs_info(sbi, "inline encryption not supported");
 849 #endif
 850                         break;
 851                 case Opt_checkpoint_disable_cap_perc:
 852                         if (args->from && match_int(args, &arg))
 853                                 return -EINVAL;
 854                         if (arg < 0 || arg > 100)
 855                                 return -EINVAL;
 856                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
 857                         set_opt(sbi, DISABLE_CHECKPOINT);
 858                         break;
 859                 case Opt_checkpoint_disable_cap:
 860                         if (args->from && match_int(args, &arg))
 861                                 return -EINVAL;
 862                         F2FS_OPTION(sbi).unusable_cap = arg;
 863                         set_opt(sbi, DISABLE_CHECKPOINT);
 864                         break;
 865                 case Opt_checkpoint_disable:
 866                         set_opt(sbi, DISABLE_CHECKPOINT);
 867                         break;
 868                 case Opt_checkpoint_enable:
 869                         clear_opt(sbi, DISABLE_CHECKPOINT);
 870                         break;
 871 #ifdef CONFIG_F2FS_FS_COMPRESSION
 872                 case Opt_compress_algorithm:
 873                         if (!f2fs_sb_has_compression(sbi)) {
 874                                 f2fs_info(sbi, "Image doesn't support compression");
 875                                 break;
 876                         }
 877                         name = match_strdup(&args[0]);
 878                         if (!name)
 879                                 return -ENOMEM;
 880                         if (!strcmp(name, "lzo")) {
 881                                 F2FS_OPTION(sbi).compress_algorithm =
 882                                                                 COMPRESS_LZO;
 883                         } else if (!strcmp(name, "lz4")) {
 884                                 F2FS_OPTION(sbi).compress_algorithm =
 885                                                                 COMPRESS_LZ4;
 886                         } else if (!strcmp(name, "zstd")) {
 887                                 F2FS_OPTION(sbi).compress_algorithm =
 888                                                                 COMPRESS_ZSTD;
 889                         } else if (!strcmp(name, "lzo-rle")) {
 890                                 F2FS_OPTION(sbi).compress_algorithm =
 891                                                                 COMPRESS_LZORLE;
 892                         } else {
 893                                 kfree(name);
 894                                 return -EINVAL;
 895                         }
 896                         kfree(name);
 897                         break;
 898                 case Opt_compress_log_size:
 899                         if (!f2fs_sb_has_compression(sbi)) {
 900                                 f2fs_info(sbi, "Image doesn't support compression");
 901                                 break;
 902                         }
 903                         if (args->from && match_int(args, &arg))
 904                                 return -EINVAL;
 905                         if (arg < MIN_COMPRESS_LOG_SIZE ||
 906                                 arg > MAX_COMPRESS_LOG_SIZE) {
 907                                 f2fs_err(sbi,
 908                                         "Compress cluster log size is out of range");
 909                                 return -EINVAL;
 910                         }
 911                         F2FS_OPTION(sbi).compress_log_size = arg;
 912                         break;
 913                 case Opt_compress_extension:
 914                         if (!f2fs_sb_has_compression(sbi)) {
 915                                 f2fs_info(sbi, "Image doesn't support compression");
 916                                 break;
 917                         }
 918                         name = match_strdup(&args[0]);
 919                         if (!name)
 920                                 return -ENOMEM;
 921
 922                         ext = F2FS_OPTION(sbi).extensions;
 923                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 924
 925                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
 926                                 ext_cnt >= COMPRESS_EXT_NUM) {
 927                                 f2fs_err(sbi,
 928                                         "invalid extension length/number");
 929                                 kfree(name);
 930                                 return -EINVAL;
 931                         }
 932
 933                         strcpy(ext[ext_cnt], name);
 934                         F2FS_OPTION(sbi).compress_ext_cnt++;
 935                         kfree(name);
 936                         break;
 937 #else
 938                 case Opt_compress_algorithm:
 939                 case Opt_compress_log_size:
 940                 case Opt_compress_extension:
 941                         f2fs_info(sbi, "compression options not supported");
 942                         break;
 943 #endif
 944                 case Opt_atgc:
 945                         set_opt(sbi, ATGC);
 946                         break;
 947                 default:
 948                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
 949                                  p);
 950                         return -EINVAL;
 951                 }
 952         }
 953 #ifdef CONFIG_QUOTA
 954         if (f2fs_check_quota_options(sbi))
 955                 return -EINVAL;
 956 #else
 957         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
 958                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 959                 return -EINVAL;
 960         }
 961         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
 962                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 963                 return -EINVAL;
 964         }
 965 #endif
 966 #ifndef CONFIG_UNICODE
 967         if (f2fs_sb_has_casefold(sbi)) {
 968                 f2fs_err(sbi,
 969                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
 970                 return -EINVAL;
 971         }
 972 #endif
 973         /*
 974          * The BLKZONED feature indicates that the drive was formatted with
 975          * zone alignment optimization. This is optional for host-aware
 976          * devices, but mandatory for host-managed zoned block devices.
 977          */
 978 #ifndef CONFIG_BLK_DEV_ZONED
 979         if (f2fs_sb_has_blkzoned(sbi)) {
 980                 f2fs_err(sbi, "Zoned block device support is not enabled");
 981                 return -EINVAL;
 982         }
 983 #endif
 984
 985         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
 986                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
 987                          F2FS_IO_SIZE_KB(sbi));
 988                 return -EINVAL;
 989         }
 990
 991         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
 992                 int min_size, max_size;
 993
 994                 if (!f2fs_sb_has_extra_attr(sbi) ||
 995                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
 996                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
 997                         return -EINVAL;
 998                 }
 999                 if (!test_opt(sbi, INLINE_XATTR)) {
1000                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1001                         return -EINVAL;
1002                 }
1003
1004                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1005                 max_size = MAX_INLINE_XATTR_SIZE;
1006
1007                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1008                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1009                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1010                                  min_size, max_size);
1011                         return -EINVAL;
1012                 }
1013         }
1014
1015         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1016                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
1017                 return -EINVAL;
1018         }
1019
1020         /* Not pass down write hints if the number of active logs is lesser
1021          * than NR_CURSEG_PERSIST_TYPE.
1022          */
1023         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
1024                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1025         return 0;
1026 }
1027
1028 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1029 {
1030         struct f2fs_inode_info *fi;
1031
1032         fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
1033         if (!fi)
1034                 return NULL;
1035
1036         init_once((void *) fi);
1037
1038         /* Initialize f2fs-specific inode info */
1039         atomic_set(&fi->dirty_pages, 0);
1040         atomic_set(&fi->i_compr_blocks, 0);
1041         init_rwsem(&fi->i_sem);
1042         spin_lock_init(&fi->i_size_lock);
1043         INIT_LIST_HEAD(&fi->dirty_list);
1044         INIT_LIST_HEAD(&fi->gdirty_list);
1045         INIT_LIST_HEAD(&fi->inmem_ilist);
1046         INIT_LIST_HEAD(&fi->inmem_pages);
1047         mutex_init(&fi->inmem_lock);
1048         init_rwsem(&fi->i_gc_rwsem[READ]);
1049         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1050         init_rwsem(&fi->i_mmap_sem);
1051         init_rwsem(&fi->i_xattr_sem);
1052
1053         /* Will be used by directory only */
1054         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1055
1056         fi->ra_offset = -1;
1057
1058         return &fi->vfs_inode;
1059 }
1060
1061 static int f2fs_drop_inode(struct inode *inode)
1062 {
1063         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1064         int ret;
1065
1066         /*
1067          * during filesystem shutdown, if checkpoint is disabled,
1068          * drop useless meta/node dirty pages.
1069          */
1070         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1071                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1072                         inode->i_ino == F2FS_META_INO(sbi)) {
1073                         trace_f2fs_drop_inode(inode, 1);
1074                         return 1;
1075                 }
1076         }
1077
1078         /*
1079          * This is to avoid a deadlock condition like below.
1080          * writeback_single_inode(inode)
1081          *  - f2fs_write_data_page
1082          *    - f2fs_gc -> iput -> evict
1083          *       - inode_wait_for_writeback(inode)
1084          */
1085         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1086                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1087                         /* to avoid evict_inode call simultaneously */
1088                         atomic_inc(&inode->i_count);
1089                         spin_unlock(&inode->i_lock);
1090
1091                         /* some remained atomic pages should discarded */
1092                         if (f2fs_is_atomic_file(inode))
1093                                 f2fs_drop_inmem_pages(inode);
1094
1095                         /* should remain fi->extent_tree for writepage */
1096                         f2fs_destroy_extent_node(inode);
1097
1098                         sb_start_intwrite(inode->i_sb);
1099                         f2fs_i_size_write(inode, 0);
1100
1101                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1102                                         inode, NULL, 0, DATA);
1103                         truncate_inode_pages_final(inode->i_mapping);
1104
1105                         if (F2FS_HAS_BLOCKS(inode))
1106                                 f2fs_truncate(inode);
1107
1108                         sb_end_intwrite(inode->i_sb);
1109
1110                         spin_lock(&inode->i_lock);
1111                         atomic_dec(&inode->i_count);
1112                 }
1113                 trace_f2fs_drop_inode(inode, 0);
1114                 return 0;
1115         }
1116         ret = generic_drop_inode(inode);
1117         if (!ret)
1118                 ret = fscrypt_drop_inode(inode);
1119         trace_f2fs_drop_inode(inode, ret);
1120         return ret;
1121 }
1122
1123 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1124 {
1125         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1126         int ret = 0;
1127
1128         spin_lock(&sbi->inode_lock[DIRTY_META]);
1129         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1130                 ret = 1;
1131         } else {
1132                 set_inode_flag(inode, FI_DIRTY_INODE);
1133                 stat_inc_dirty_inode(sbi, DIRTY_META);
1134         }
1135         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1136                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1137                                 &sbi->inode_list[DIRTY_META]);
1138                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1139         }
1140         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1141         return ret;
1142 }
1143
1144 void f2fs_inode_synced(struct inode *inode)
1145 {
1146         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1147
1148         spin_lock(&sbi->inode_lock[DIRTY_META]);
1149         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1150                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1151                 return;
1152         }
1153         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1154                 list_del_init(&F2FS_I(inode)->gdirty_list);
1155                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1156         }
1157         clear_inode_flag(inode, FI_DIRTY_INODE);
1158         clear_inode_flag(inode, FI_AUTO_RECOVER);
1159         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1160         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1161 }
1162
1163 /*
1164  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1165  *
1166  * We should call set_dirty_inode to write the dirty inode through write_inode.
1167  */
1168 static void f2fs_dirty_inode(struct inode *inode, int flags)
1169 {
1170         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1171
1172         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1173                         inode->i_ino == F2FS_META_INO(sbi))
1174                 return;
1175
1176         if (flags == I_DIRTY_TIME)
1177                 return;
1178
1179         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1180                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1181
1182         f2fs_inode_dirtied(inode, false);
1183 }
1184
1185 static void f2fs_free_inode(struct inode *inode)
1186 {
1187         fscrypt_free_inode(inode);
1188         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1189 }
1190
1191 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1192 {
1193         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1194         percpu_counter_destroy(&sbi->total_valid_inode_count);
1195 }
1196
1197 static void destroy_device_list(struct f2fs_sb_info *sbi)
1198 {
1199         int i;
1200
1201         for (i = 0; i < sbi->s_ndevs; i++) {
1202                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1203 #ifdef CONFIG_BLK_DEV_ZONED
1204                 kvfree(FDEV(i).blkz_seq);
1205                 kfree(FDEV(i).zone_capacity_blocks);
1206 #endif
1207         }
1208         kvfree(sbi->devs);
1209 }
1210
1211 static void f2fs_put_super(struct super_block *sb)
1212 {
1213         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1214         int i;
1215         bool dropped;
1216
1217         /* unregister procfs/sysfs entries in advance to avoid race case */
1218         f2fs_unregister_sysfs(sbi);
1219
1220         f2fs_quota_off_umount(sb);
1221
1222         /* prevent remaining shrinker jobs */
1223         mutex_lock(&sbi->umount_mutex);
1224
1225         /*
1226          * We don't need to do checkpoint when superblock is clean.
1227          * But, the previous checkpoint was not done by umount, it needs to do
1228          * clean checkpoint again.
1229          */
1230         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1231                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1232                 struct cp_control cpc = {
1233                         .reason = CP_UMOUNT,
1234                 };
1235                 f2fs_write_checkpoint(sbi, &cpc);
1236         }
1237
1238         /* be sure to wait for any on-going discard commands */
1239         dropped = f2fs_issue_discard_timeout(sbi);
1240
1241         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1242                                         !sbi->discard_blks && !dropped) {
1243                 struct cp_control cpc = {
1244                         .reason = CP_UMOUNT | CP_TRIMMED,
1245                 };
1246                 f2fs_write_checkpoint(sbi, &cpc);
1247         }
1248
1249         /*
1250          * normally superblock is clean, so we need to release this.
1251          * In addition, EIO will skip do checkpoint, we need this as well.
1252          */
1253         f2fs_release_ino_entry(sbi, true);
1254
1255         f2fs_leave_shrinker(sbi);
1256         mutex_unlock(&sbi->umount_mutex);
1257
1258         /* our cp_error case, we can wait for any writeback page */
1259         f2fs_flush_merged_writes(sbi);
1260
1261         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1262
1263         f2fs_bug_on(sbi, sbi->fsync_node_num);
1264
1265         iput(sbi->node_inode);
1266         sbi->node_inode = NULL;
1267
1268         iput(sbi->meta_inode);
1269         sbi->meta_inode = NULL;
1270
1271         /*
1272          * iput() can update stat information, if f2fs_write_checkpoint()
1273          * above failed with error.
1274          */
1275         f2fs_destroy_stats(sbi);
1276
1277         /* destroy f2fs internal modules */
1278         f2fs_destroy_node_manager(sbi);
1279         f2fs_destroy_segment_manager(sbi);
1280
1281         f2fs_destroy_post_read_wq(sbi);
1282
1283         kvfree(sbi->ckpt);
1284
1285         sb->s_fs_info = NULL;
1286         if (sbi->s_chksum_driver)
1287                 crypto_free_shash(sbi->s_chksum_driver);
1288         kfree(sbi->raw_super);
1289
1290         destroy_device_list(sbi);
1291         f2fs_destroy_page_array_cache(sbi);
1292         f2fs_destroy_xattr_caches(sbi);
1293         mempool_destroy(sbi->write_io_dummy);
1294 #ifdef CONFIG_QUOTA
1295         for (i = 0; i < MAXQUOTAS; i++)
1296                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1297 #endif
1298         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1299         destroy_percpu_info(sbi);
1300         for (i = 0; i < NR_PAGE_TYPE; i++)
1301                 kvfree(sbi->write_io[i]);
1302 #ifdef CONFIG_UNICODE
1303         utf8_unload(sb->s_encoding);
1304 #endif
1305         kfree(sbi);
1306 }
1307
1308 int f2fs_sync_fs(struct super_block *sb, int sync)
1309 {
1310         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1311         int err = 0;
1312
1313         if (unlikely(f2fs_cp_error(sbi)))
1314                 return 0;
1315         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1316                 return 0;
1317
1318         trace_f2fs_sync_fs(sb, sync);
1319
1320         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1321                 return -EAGAIN;
1322
1323         if (sync) {
1324                 struct cp_control cpc;
1325
1326                 cpc.reason = __get_cp_reason(sbi);
1327
1328                 down_write(&sbi->gc_lock);
1329                 err = f2fs_write_checkpoint(sbi, &cpc);
1330                 up_write(&sbi->gc_lock);
1331         }
1332         f2fs_trace_ios(NULL, 1);
1333
1334         return err;
1335 }
1336
1337 static int f2fs_freeze(struct super_block *sb)
1338 {
1339         if (f2fs_readonly(sb))
1340                 return 0;
1341
1342         /* IO error happened before */
1343         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1344                 return -EIO;
1345
1346         /* must be clean, since sync_filesystem() was already called */
1347         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1348                 return -EINVAL;
1349         return 0;
1350 }
1351
1352 static int f2fs_unfreeze(struct super_block *sb)
1353 {
1354         return 0;
1355 }
1356
1357 #ifdef CONFIG_QUOTA
1358 static int f2fs_statfs_project(struct super_block *sb,
1359                                 kprojid_t projid, struct kstatfs *buf)
1360 {
1361         struct kqid qid;
1362         struct dquot *dquot;
1363         u64 limit;
1364         u64 curblock;
1365
1366         qid = make_kqid_projid(projid);
1367         dquot = dqget(sb, qid);
1368         if (IS_ERR(dquot))
1369                 return PTR_ERR(dquot);
1370         spin_lock(&dquot->dq_dqb_lock);
1371
1372         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1373                                         dquot->dq_dqb.dqb_bhardlimit);
1374         if (limit)
1375                 limit >>= sb->s_blocksize_bits;
1376
1377         if (limit && buf->f_blocks > limit) {
1378                 curblock = (dquot->dq_dqb.dqb_curspace +
1379                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1380                 buf->f_blocks = limit;
1381                 buf->f_bfree = buf->f_bavail =
1382                         (buf->f_blocks > curblock) ?
1383                          (buf->f_blocks - curblock) : 0;
1384         }
1385
1386         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1387                                         dquot->dq_dqb.dqb_ihardlimit);
1388
1389         if (limit && buf->f_files > limit) {
1390                 buf->f_files = limit;
1391                 buf->f_ffree =
1392                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1393                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1394         }
1395
1396         spin_unlock(&dquot->dq_dqb_lock);
1397         dqput(dquot);
1398         return 0;
1399 }
1400 #endif
1401
1402 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1403 {
1404         struct super_block *sb = dentry->d_sb;
1405         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1406         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1407         block_t total_count, user_block_count, start_count;
1408         u64 avail_node_count;
1409
1410         total_count = le64_to_cpu(sbi->raw_super->block_count);
1411         user_block_count = sbi->user_block_count;
1412         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1413         buf->f_type = F2FS_SUPER_MAGIC;
1414         buf->f_bsize = sbi->blocksize;
1415
1416         buf->f_blocks = total_count - start_count;
1417         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1418                                                 sbi->current_reserved_blocks;
1419
1420         spin_lock(&sbi->stat_lock);
1421         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1422                 buf->f_bfree = 0;
1423         else
1424                 buf->f_bfree -= sbi->unusable_block_count;
1425         spin_unlock(&sbi->stat_lock);
1426
1427         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1428                 buf->f_bavail = buf->f_bfree -
1429                                 F2FS_OPTION(sbi).root_reserved_blocks;
1430         else
1431                 buf->f_bavail = 0;
1432
1433         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1434
1435         if (avail_node_count > user_block_count) {
1436                 buf->f_files = user_block_count;
1437                 buf->f_ffree = buf->f_bavail;
1438         } else {
1439                 buf->f_files = avail_node_count;
1440                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1441                                         buf->f_bavail);
1442         }
1443
1444         buf->f_namelen = F2FS_NAME_LEN;
1445         buf->f_fsid.val[0] = (u32)id;
1446         buf->f_fsid.val[1] = (u32)(id >> 32);
1447
1448 #ifdef CONFIG_QUOTA
1449         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1450                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1451                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1452         }
1453 #endif
1454         return 0;
1455 }
1456
1457 static inline void f2fs_show_quota_options(struct seq_file *seq,
1458                                            struct super_block *sb)
1459 {
1460 #ifdef CONFIG_QUOTA
1461         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1462
1463         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1464                 char *fmtname = "";
1465
1466                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1467                 case QFMT_VFS_OLD:
1468                         fmtname = "vfsold";
1469                         break;
1470                 case QFMT_VFS_V0:
1471                         fmtname = "vfsv0";
1472                         break;
1473                 case QFMT_VFS_V1:
1474                         fmtname = "vfsv1";
1475                         break;
1476                 }
1477                 seq_printf(seq, ",jqfmt=%s", fmtname);
1478         }
1479
1480         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1481                 seq_show_option(seq, "usrjquota",
1482                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1483
1484         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1485                 seq_show_option(seq, "grpjquota",
1486                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1487
1488         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1489                 seq_show_option(seq, "prjjquota",
1490                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1491 #endif
1492 }
1493
1494 static inline void f2fs_show_compress_options(struct seq_file *seq,
1495                                                         struct super_block *sb)
1496 {
1497         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1498         char *algtype = "";
1499         int i;
1500
1501         if (!f2fs_sb_has_compression(sbi))
1502                 return;
1503
1504         switch (F2FS_OPTION(sbi).compress_algorithm) {
1505         case COMPRESS_LZO:
1506                 algtype = "lzo";
1507                 break;
1508         case COMPRESS_LZ4:
1509                 algtype = "lz4";
1510                 break;
1511         case COMPRESS_ZSTD:
1512                 algtype = "zstd";
1513                 break;
1514         case COMPRESS_LZORLE:
1515                 algtype = "lzo-rle";
1516                 break;
1517         }
1518         seq_printf(seq, ",compress_algorithm=%s", algtype);
1519
1520         seq_printf(seq, ",compress_log_size=%u",
1521                         F2FS_OPTION(sbi).compress_log_size);
1522
1523         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1524                 seq_printf(seq, ",compress_extension=%s",
1525                         F2FS_OPTION(sbi).extensions[i]);
1526         }
1527 }
1528
1529 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1530 {
1531         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1532
1533         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1534                 seq_printf(seq, ",background_gc=%s", "sync");
1535         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1536                 seq_printf(seq, ",background_gc=%s", "on");
1537         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1538                 seq_printf(seq, ",background_gc=%s", "off");
1539
1540         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1541                 seq_puts(seq, ",disable_roll_forward");
1542         if (test_opt(sbi, NORECOVERY))
1543                 seq_puts(seq, ",norecovery");
1544         if (test_opt(sbi, DISCARD))
1545                 seq_puts(seq, ",discard");
1546         else
1547                 seq_puts(seq, ",nodiscard");
1548         if (test_opt(sbi, NOHEAP))
1549                 seq_puts(seq, ",no_heap");
1550         else
1551                 seq_puts(seq, ",heap");
1552 #ifdef CONFIG_F2FS_FS_XATTR
1553         if (test_opt(sbi, XATTR_USER))
1554                 seq_puts(seq, ",user_xattr");
1555         else
1556                 seq_puts(seq, ",nouser_xattr");
1557         if (test_opt(sbi, INLINE_XATTR))
1558                 seq_puts(seq, ",inline_xattr");
1559         else
1560                 seq_puts(seq, ",noinline_xattr");
1561         if (test_opt(sbi, INLINE_XATTR_SIZE))
1562                 seq_printf(seq, ",inline_xattr_size=%u",
1563                                         F2FS_OPTION(sbi).inline_xattr_size);
1564 #endif
1565 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1566         if (test_opt(sbi, POSIX_ACL))
1567                 seq_puts(seq, ",acl");
1568         else
1569                 seq_puts(seq, ",noacl");
1570 #endif
1571         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1572                 seq_puts(seq, ",disable_ext_identify");
1573         if (test_opt(sbi, INLINE_DATA))
1574                 seq_puts(seq, ",inline_data");
1575         else
1576                 seq_puts(seq, ",noinline_data");
1577         if (test_opt(sbi, INLINE_DENTRY))
1578                 seq_puts(seq, ",inline_dentry");
1579         else
1580                 seq_puts(seq, ",noinline_dentry");
1581         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1582                 seq_puts(seq, ",flush_merge");
1583         if (test_opt(sbi, NOBARRIER))
1584                 seq_puts(seq, ",nobarrier");
1585         if (test_opt(sbi, FASTBOOT))
1586                 seq_puts(seq, ",fastboot");
1587         if (test_opt(sbi, EXTENT_CACHE))
1588                 seq_puts(seq, ",extent_cache");
1589         else
1590                 seq_puts(seq, ",noextent_cache");
1591         if (test_opt(sbi, DATA_FLUSH))
1592                 seq_puts(seq, ",data_flush");
1593
1594         seq_puts(seq, ",mode=");
1595         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1596                 seq_puts(seq, "adaptive");
1597         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1598                 seq_puts(seq, "lfs");
1599         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1600         if (test_opt(sbi, RESERVE_ROOT))
1601                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1602                                 F2FS_OPTION(sbi).root_reserved_blocks,
1603                                 from_kuid_munged(&init_user_ns,
1604                                         F2FS_OPTION(sbi).s_resuid),
1605                                 from_kgid_munged(&init_user_ns,
1606                                         F2FS_OPTION(sbi).s_resgid));
1607         if (F2FS_IO_SIZE_BITS(sbi))
1608                 seq_printf(seq, ",io_bits=%u",
1609                                 F2FS_OPTION(sbi).write_io_size_bits);
1610 #ifdef CONFIG_F2FS_FAULT_INJECTION
1611         if (test_opt(sbi, FAULT_INJECTION)) {
1612                 seq_printf(seq, ",fault_injection=%u",
1613                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1614                 seq_printf(seq, ",fault_type=%u",
1615                                 F2FS_OPTION(sbi).fault_info.inject_type);
1616         }
1617 #endif
1618 #ifdef CONFIG_QUOTA
1619         if (test_opt(sbi, QUOTA))
1620                 seq_puts(seq, ",quota");
1621         if (test_opt(sbi, USRQUOTA))
1622                 seq_puts(seq, ",usrquota");
1623         if (test_opt(sbi, GRPQUOTA))
1624                 seq_puts(seq, ",grpquota");
1625         if (test_opt(sbi, PRJQUOTA))
1626                 seq_puts(seq, ",prjquota");
1627 #endif
1628         f2fs_show_quota_options(seq, sbi->sb);
1629         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1630                 seq_printf(seq, ",whint_mode=%s", "user-based");
1631         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1632                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1633
1634         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1635
1636         if (sbi->sb->s_flags & SB_INLINECRYPT)
1637                 seq_puts(seq, ",inlinecrypt");
1638
1639         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1640                 seq_printf(seq, ",alloc_mode=%s", "default");
1641         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1642                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1643
1644         if (test_opt(sbi, DISABLE_CHECKPOINT))
1645                 seq_printf(seq, ",checkpoint=disable:%u",
1646                                 F2FS_OPTION(sbi).unusable_cap);
1647         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1648                 seq_printf(seq, ",fsync_mode=%s", "posix");
1649         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1650                 seq_printf(seq, ",fsync_mode=%s", "strict");
1651         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1652                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1653
1654 #ifdef CONFIG_F2FS_FS_COMPRESSION
1655         f2fs_show_compress_options(seq, sbi->sb);
1656 #endif
1657
1658         if (test_opt(sbi, ATGC))
1659                 seq_puts(seq, ",atgc");
1660         return 0;
1661 }
1662
1663 static void default_options(struct f2fs_sb_info *sbi)
1664 {
1665         /* init some FS parameters */
1666         F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
1667         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1668         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1669         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1670         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1671         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1672         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1673         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1674         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1675         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1676         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1677
1678         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1679
1680         set_opt(sbi, INLINE_XATTR);
1681         set_opt(sbi, INLINE_DATA);
1682         set_opt(sbi, INLINE_DENTRY);
1683         set_opt(sbi, EXTENT_CACHE);
1684         set_opt(sbi, NOHEAP);
1685         clear_opt(sbi, DISABLE_CHECKPOINT);
1686         F2FS_OPTION(sbi).unusable_cap = 0;
1687         sbi->sb->s_flags |= SB_LAZYTIME;
1688         set_opt(sbi, FLUSH_MERGE);
1689         set_opt(sbi, DISCARD);
1690         if (f2fs_sb_has_blkzoned(sbi))
1691                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
1692         else
1693                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
1694
1695 #ifdef CONFIG_F2FS_FS_XATTR
1696         set_opt(sbi, XATTR_USER);
1697 #endif
1698 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1699         set_opt(sbi, POSIX_ACL);
1700 #endif
1701
1702         f2fs_build_fault_attr(sbi, 0, 0);
1703 }
1704
1705 #ifdef CONFIG_QUOTA
1706 static int f2fs_enable_quotas(struct super_block *sb);
1707 #endif
1708
1709 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1710 {
1711         unsigned int s_flags = sbi->sb->s_flags;
1712         struct cp_control cpc;
1713         int err = 0;
1714         int ret;
1715         block_t unusable;
1716
1717         if (s_flags & SB_RDONLY) {
1718                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1719                 return -EINVAL;
1720         }
1721         sbi->sb->s_flags |= SB_ACTIVE;
1722
1723         f2fs_update_time(sbi, DISABLE_TIME);
1724
1725         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1726                 down_write(&sbi->gc_lock);
1727                 err = f2fs_gc(sbi, true, false, NULL_SEGNO);
1728                 if (err == -ENODATA) {
1729                         err = 0;
1730                         break;
1731                 }
1732                 if (err && err != -EAGAIN)
1733                         break;
1734         }
1735
1736         ret = sync_filesystem(sbi->sb);
1737         if (ret || err) {
1738                 err = ret ? ret: err;
1739                 goto restore_flag;
1740         }
1741
1742         unusable = f2fs_get_unusable_blocks(sbi);
1743         if (f2fs_disable_cp_again(sbi, unusable)) {
1744                 err = -EAGAIN;
1745                 goto restore_flag;
1746         }
1747
1748         down_write(&sbi->gc_lock);
1749         cpc.reason = CP_PAUSE;
1750         set_sbi_flag(sbi, SBI_CP_DISABLED);
1751         err = f2fs_write_checkpoint(sbi, &cpc);
1752         if (err)
1753                 goto out_unlock;
1754
1755         spin_lock(&sbi->stat_lock);
1756         sbi->unusable_block_count = unusable;
1757         spin_unlock(&sbi->stat_lock);
1758
1759 out_unlock:
1760         up_write(&sbi->gc_lock);
1761 restore_flag:
1762         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
1763         return err;
1764 }
1765
1766 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1767 {
1768         down_write(&sbi->gc_lock);
1769         f2fs_dirty_to_prefree(sbi);
1770
1771         clear_sbi_flag(sbi, SBI_CP_DISABLED);
1772         set_sbi_flag(sbi, SBI_IS_DIRTY);
1773         up_write(&sbi->gc_lock);
1774
1775         f2fs_sync_fs(sbi->sb, 1);
1776 }
1777
1778 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1779 {
1780         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1781         struct f2fs_mount_info org_mount_opt;
1782         unsigned long old_sb_flags;
1783         int err;
1784         bool need_restart_gc = false;
1785         bool need_stop_gc = false;
1786         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1787         bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1788         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
1789         bool no_atgc = !test_opt(sbi, ATGC);
1790         bool checkpoint_changed;
1791 #ifdef CONFIG_QUOTA
1792         int i, j;
1793 #endif
1794
1795         /*
1796          * Save the old mount options in case we
1797          * need to restore them.
1798          */
1799         org_mount_opt = sbi->mount_opt;
1800         old_sb_flags = sb->s_flags;
1801
1802 #ifdef CONFIG_QUOTA
1803         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1804         for (i = 0; i < MAXQUOTAS; i++) {
1805                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1806                         org_mount_opt.s_qf_names[i] =
1807                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1808                                 GFP_KERNEL);
1809                         if (!org_mount_opt.s_qf_names[i]) {
1810                                 for (j = 0; j < i; j++)
1811                                         kfree(org_mount_opt.s_qf_names[j]);
1812                                 return -ENOMEM;
1813                         }
1814                 } else {
1815                         org_mount_opt.s_qf_names[i] = NULL;
1816                 }
1817         }
1818 #endif
1819
1820         /* recover superblocks we couldn't write due to previous RO mount */
1821         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1822                 err = f2fs_commit_super(sbi, false);
1823                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
1824                           err);
1825                 if (!err)
1826                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1827         }
1828
1829         default_options(sbi);
1830
1831         /* parse mount options */
1832         err = parse_options(sb, data, true);
1833         if (err)
1834                 goto restore_opts;
1835         checkpoint_changed =
1836                         disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1837
1838         /*
1839          * Previous and new state of filesystem is RO,
1840          * so skip checking GC and FLUSH_MERGE conditions.
1841          */
1842         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
1843                 goto skip;
1844
1845 #ifdef CONFIG_QUOTA
1846         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
1847                 err = dquot_suspend(sb, -1);
1848                 if (err < 0)
1849                         goto restore_opts;
1850         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
1851                 /* dquot_resume needs RW */
1852                 sb->s_flags &= ~SB_RDONLY;
1853                 if (sb_any_quota_suspended(sb)) {
1854                         dquot_resume(sb, -1);
1855                 } else if (f2fs_sb_has_quota_ino(sbi)) {
1856                         err = f2fs_enable_quotas(sb);
1857                         if (err)
1858                                 goto restore_opts;
1859                 }
1860         }
1861 #endif
1862         /* disallow enable atgc dynamically */
1863         if (no_atgc == !!test_opt(sbi, ATGC)) {
1864                 err = -EINVAL;
1865                 f2fs_warn(sbi, "switch atgc option is not allowed");
1866                 goto restore_opts;
1867         }
1868
1869         /* disallow enable/disable extent_cache dynamically */
1870         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1871                 err = -EINVAL;
1872                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
1873                 goto restore_opts;
1874         }
1875
1876         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
1877                 err = -EINVAL;
1878                 f2fs_warn(sbi, "switch io_bits option is not allowed");
1879                 goto restore_opts;
1880         }
1881
1882         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
1883                 err = -EINVAL;
1884                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
1885                 goto restore_opts;
1886         }
1887
1888         /*
1889          * We stop the GC thread if FS is mounted as RO
1890          * or if background_gc = off is passed in mount
1891          * option. Also sync the filesystem.
1892          */
1893         if ((*flags & SB_RDONLY) ||
1894                         F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF) {
1895                 if (sbi->gc_thread) {
1896                         f2fs_stop_gc_thread(sbi);
1897                         need_restart_gc = true;
1898                 }
1899         } else if (!sbi->gc_thread) {
1900                 err = f2fs_start_gc_thread(sbi);
1901                 if (err)
1902                         goto restore_opts;
1903                 need_stop_gc = true;
1904         }
1905
1906         if (*flags & SB_RDONLY ||
1907                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
1908                 writeback_inodes_sb(sb, WB_REASON_SYNC);
1909                 sync_inodes_sb(sb);
1910
1911                 set_sbi_flag(sbi, SBI_IS_DIRTY);
1912                 set_sbi_flag(sbi, SBI_IS_CLOSE);
1913                 f2fs_sync_fs(sb, 1);
1914                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1915         }
1916
1917         if (checkpoint_changed) {
1918                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
1919                         err = f2fs_disable_checkpoint(sbi);
1920                         if (err)
1921                                 goto restore_gc;
1922                 } else {
1923                         f2fs_enable_checkpoint(sbi);
1924                 }
1925         }
1926
1927         /*
1928          * We stop issue flush thread if FS is mounted as RO
1929          * or if flush_merge is not passed in mount option.
1930          */
1931         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
1932                 clear_opt(sbi, FLUSH_MERGE);
1933                 f2fs_destroy_flush_cmd_control(sbi, false);
1934         } else {
1935                 err = f2fs_create_flush_cmd_control(sbi);
1936                 if (err)
1937                         goto restore_gc;
1938         }
1939 skip:
1940 #ifdef CONFIG_QUOTA
1941         /* Release old quota file names */
1942         for (i = 0; i < MAXQUOTAS; i++)
1943                 kfree(org_mount_opt.s_qf_names[i]);
1944 #endif
1945         /* Update the POSIXACL Flag */
1946         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
1947                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
1948
1949         limit_reserve_root(sbi);
1950         adjust_unusable_cap_perc(sbi);
1951         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
1952         return 0;
1953 restore_gc:
1954         if (need_restart_gc) {
1955                 if (f2fs_start_gc_thread(sbi))
1956                         f2fs_warn(sbi, "background gc thread has stopped");
1957         } else if (need_stop_gc) {
1958                 f2fs_stop_gc_thread(sbi);
1959         }
1960 restore_opts:
1961 #ifdef CONFIG_QUOTA
1962         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
1963         for (i = 0; i < MAXQUOTAS; i++) {
1964                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1965                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
1966         }
1967 #endif
1968         sbi->mount_opt = org_mount_opt;
1969         sb->s_flags = old_sb_flags;
1970         return err;
1971 }
1972
1973 #ifdef CONFIG_QUOTA
1974 /* Read data from quotafile */
1975 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
1976                                size_t len, loff_t off)
1977 {
1978         struct inode *inode = sb_dqopt(sb)->files[type];
1979         struct address_space *mapping = inode->i_mapping;
1980         block_t blkidx = F2FS_BYTES_TO_BLK(off);
1981         int offset = off & (sb->s_blocksize - 1);
1982         int tocopy;
1983         size_t toread;
1984         loff_t i_size = i_size_read(inode);
1985         struct page *page;
1986         char *kaddr;
1987
1988         if (off > i_size)
1989                 return 0;
1990
1991         if (off + len > i_size)
1992                 len = i_size - off;
1993         toread = len;
1994         while (toread > 0) {
1995                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
1996 repeat:
1997                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
1998                 if (IS_ERR(page)) {
1999                         if (PTR_ERR(page) == -ENOMEM) {
2000                                 congestion_wait(BLK_RW_ASYNC,
2001                                                 DEFAULT_IO_TIMEOUT);
2002                                 goto repeat;
2003                         }
2004                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2005                         return PTR_ERR(page);
2006                 }
2007
2008                 lock_page(page);
2009
2010                 if (unlikely(page->mapping != mapping)) {
2011                         f2fs_put_page(page, 1);
2012                         goto repeat;
2013                 }
2014                 if (unlikely(!PageUptodate(page))) {
2015                         f2fs_put_page(page, 1);
2016                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2017                         return -EIO;
2018                 }
2019
2020                 kaddr = kmap_atomic(page);
2021                 memcpy(data, kaddr + offset, tocopy);
2022                 kunmap_atomic(kaddr);
2023                 f2fs_put_page(page, 1);
2024
2025                 offset = 0;
2026                 toread -= tocopy;
2027                 data += tocopy;
2028                 blkidx++;
2029         }
2030         return len;
2031 }
2032
2033 /* Write to quotafile */
2034 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2035                                 const char *data, size_t len, loff_t off)
2036 {
2037         struct inode *inode = sb_dqopt(sb)->files[type];
2038         struct address_space *mapping = inode->i_mapping;
2039         const struct address_space_operations *a_ops = mapping->a_ops;
2040         int offset = off & (sb->s_blocksize - 1);
2041         size_t towrite = len;
2042         struct page *page;
2043         void *fsdata = NULL;
2044         char *kaddr;
2045         int err = 0;
2046         int tocopy;
2047
2048         while (towrite > 0) {
2049                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2050                                                                 towrite);
2051 retry:
2052                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2053                                                         &page, &fsdata);
2054                 if (unlikely(err)) {
2055                         if (err == -ENOMEM) {
2056                                 congestion_wait(BLK_RW_ASYNC,
2057                                                 DEFAULT_IO_TIMEOUT);
2058                                 goto retry;
2059                         }
2060                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2061                         break;
2062                 }
2063
2064                 kaddr = kmap_atomic(page);
2065                 memcpy(kaddr + offset, data, tocopy);
2066                 kunmap_atomic(kaddr);
2067                 flush_dcache_page(page);
2068
2069                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2070                                                 page, fsdata);
2071                 offset = 0;
2072                 towrite -= tocopy;
2073                 off += tocopy;
2074                 data += tocopy;
2075                 cond_resched();
2076         }
2077
2078         if (len == towrite)
2079                 return err;
2080         inode->i_mtime = inode->i_ctime = current_time(inode);
2081         f2fs_mark_inode_dirty_sync(inode, false);
2082         return len - towrite;
2083 }
2084
2085 static struct dquot **f2fs_get_dquots(struct inode *inode)
2086 {
2087         return F2FS_I(inode)->i_dquot;
2088 }
2089
2090 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2091 {
2092         return &F2FS_I(inode)->i_reserved_quota;
2093 }
2094
2095 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2096 {
2097         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2098                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2099                 return 0;
2100         }
2101
2102         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2103                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2104 }
2105
2106 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2107 {
2108         int enabled = 0;
2109         int i, err;
2110
2111         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2112                 err = f2fs_enable_quotas(sbi->sb);
2113                 if (err) {
2114                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2115                         return 0;
2116                 }
2117                 return 1;
2118         }
2119
2120         for (i = 0; i < MAXQUOTAS; i++) {
2121                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2122                         err = f2fs_quota_on_mount(sbi, i);
2123                         if (!err) {
2124                                 enabled = 1;
2125                                 continue;
2126                         }
2127                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2128                                  err, i);
2129                 }
2130         }
2131         return enabled;
2132 }
2133
2134 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2135                              unsigned int flags)
2136 {
2137         struct inode *qf_inode;
2138         unsigned long qf_inum;
2139         int err;
2140
2141         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2142
2143         qf_inum = f2fs_qf_ino(sb, type);
2144         if (!qf_inum)
2145                 return -EPERM;
2146
2147         qf_inode = f2fs_iget(sb, qf_inum);
2148         if (IS_ERR(qf_inode)) {
2149                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2150                 return PTR_ERR(qf_inode);
2151         }
2152
2153         /* Don't account quota for quota files to avoid recursion */
2154         qf_inode->i_flags |= S_NOQUOTA;
2155         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2156         iput(qf_inode);
2157         return err;
2158 }
2159
2160 static int f2fs_enable_quotas(struct super_block *sb)
2161 {
2162         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2163         int type, err = 0;
2164         unsigned long qf_inum;
2165         bool quota_mopt[MAXQUOTAS] = {
2166                 test_opt(sbi, USRQUOTA),
2167                 test_opt(sbi, GRPQUOTA),
2168                 test_opt(sbi, PRJQUOTA),
2169         };
2170
2171         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2172                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2173                 return 0;
2174         }
2175
2176         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2177
2178         for (type = 0; type < MAXQUOTAS; type++) {
2179                 qf_inum = f2fs_qf_ino(sb, type);
2180                 if (qf_inum) {
2181                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2182                                 DQUOT_USAGE_ENABLED |
2183                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2184                         if (err) {
2185                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2186                                          type, err);
2187                                 for (type--; type >= 0; type--)
2188                                         dquot_quota_off(sb, type);
2189                                 set_sbi_flag(F2FS_SB(sb),
2190                                                 SBI_QUOTA_NEED_REPAIR);
2191                                 return err;
2192                         }
2193                 }
2194         }
2195         return 0;
2196 }
2197
2198 int f2fs_quota_sync(struct super_block *sb, int type)
2199 {
2200         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2201         struct quota_info *dqopt = sb_dqopt(sb);
2202         int cnt;
2203         int ret;
2204
2205         /*
2206          * do_quotactl
2207          *  f2fs_quota_sync
2208          *  down_read(quota_sem)
2209          *  dquot_writeback_dquots()
2210          *  f2fs_dquot_commit
2211          *                            block_operation
2212          *                            down_read(quota_sem)
2213          */
2214         f2fs_lock_op(sbi);
2215
2216         down_read(&sbi->quota_sem);
2217         ret = dquot_writeback_dquots(sb, type);
2218         if (ret)
2219                 goto out;
2220
2221         /*
2222          * Now when everything is written we can discard the pagecache so
2223          * that userspace sees the changes.
2224          */
2225         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2226                 struct address_space *mapping;
2227
2228                 if (type != -1 && cnt != type)
2229                         continue;
2230                 if (!sb_has_quota_active(sb, cnt))
2231                         continue;
2232
2233                 mapping = dqopt->files[cnt]->i_mapping;
2234
2235                 ret = filemap_fdatawrite(mapping);
2236                 if (ret)
2237                         goto out;
2238
2239                 /* if we are using journalled quota */
2240                 if (is_journalled_quota(sbi))
2241                         continue;
2242
2243                 ret = filemap_fdatawait(mapping);
2244                 if (ret)
2245                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2246
2247                 inode_lock(dqopt->files[cnt]);
2248                 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
2249                 inode_unlock(dqopt->files[cnt]);
2250         }
2251 out:
2252         if (ret)
2253                 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2254         up_read(&sbi->quota_sem);
2255         f2fs_unlock_op(sbi);
2256         return ret;
2257 }
2258
2259 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2260                                                         const struct path *path)
2261 {
2262         struct inode *inode;
2263         int err;
2264
2265         /* if quota sysfile exists, deny enabling quota with specific file */
2266         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2267                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2268                 return -EBUSY;
2269         }
2270
2271         err = f2fs_quota_sync(sb, type);
2272         if (err)
2273                 return err;
2274
2275         err = dquot_quota_on(sb, type, format_id, path);
2276         if (err)
2277                 return err;
2278
2279         inode = d_inode(path->dentry);
2280
2281         inode_lock(inode);
2282         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2283         f2fs_set_inode_flags(inode);
2284         inode_unlock(inode);
2285         f2fs_mark_inode_dirty_sync(inode, false);
2286
2287         return 0;
2288 }
2289
2290 static int __f2fs_quota_off(struct super_block *sb, int type)
2291 {
2292         struct inode *inode = sb_dqopt(sb)->files[type];
2293         int err;
2294
2295         if (!inode || !igrab(inode))
2296                 return dquot_quota_off(sb, type);
2297
2298         err = f2fs_quota_sync(sb, type);
2299         if (err)
2300                 goto out_put;
2301
2302         err = dquot_quota_off(sb, type);
2303         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2304                 goto out_put;
2305
2306         inode_lock(inode);
2307         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2308         f2fs_set_inode_flags(inode);
2309         inode_unlock(inode);
2310         f2fs_mark_inode_dirty_sync(inode, false);
2311 out_put:
2312         iput(inode);
2313         return err;
2314 }
2315
2316 static int f2fs_quota_off(struct super_block *sb, int type)
2317 {
2318         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2319         int err;
2320
2321         err = __f2fs_quota_off(sb, type);
2322
2323         /*
2324          * quotactl can shutdown journalled quota, result in inconsistence
2325          * between quota record and fs data by following updates, tag the
2326          * flag to let fsck be aware of it.
2327          */
2328         if (is_journalled_quota(sbi))
2329                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2330         return err;
2331 }
2332
2333 void f2fs_quota_off_umount(struct super_block *sb)
2334 {
2335         int type;
2336         int err;
2337
2338         for (type = 0; type < MAXQUOTAS; type++) {
2339                 err = __f2fs_quota_off(sb, type);
2340                 if (err) {
2341                         int ret = dquot_quota_off(sb, type);
2342
2343                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2344                                  type, err, ret);
2345                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2346                 }
2347         }
2348         /*
2349          * In case of checkpoint=disable, we must flush quota blocks.
2350          * This can cause NULL exception for node_inode in end_io, since
2351          * put_super already dropped it.
2352          */
2353         sync_filesystem(sb);
2354 }
2355
2356 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2357 {
2358         struct quota_info *dqopt = sb_dqopt(sb);
2359         int type;
2360
2361         for (type = 0; type < MAXQUOTAS; type++) {
2362                 if (!dqopt->files[type])
2363                         continue;
2364                 f2fs_inode_synced(dqopt->files[type]);
2365         }
2366 }
2367
2368 static int f2fs_dquot_commit(struct dquot *dquot)
2369 {
2370         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2371         int ret;
2372
2373         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2374         ret = dquot_commit(dquot);
2375         if (ret < 0)
2376                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2377         up_read(&sbi->quota_sem);
2378         return ret;
2379 }
2380
2381 static int f2fs_dquot_acquire(struct dquot *dquot)
2382 {
2383         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2384         int ret;
2385
2386         down_read(&sbi->quota_sem);
2387         ret = dquot_acquire(dquot);
2388         if (ret < 0)
2389                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2390         up_read(&sbi->quota_sem);
2391         return ret;
2392 }
2393
2394 static int f2fs_dquot_release(struct dquot *dquot)
2395 {
2396         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2397         int ret = dquot_release(dquot);
2398
2399         if (ret < 0)
2400                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2401         return ret;
2402 }
2403
2404 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2405 {
2406         struct super_block *sb = dquot->dq_sb;
2407         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2408         int ret = dquot_mark_dquot_dirty(dquot);
2409
2410         /* if we are using journalled quota */
2411         if (is_journalled_quota(sbi))
2412                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2413
2414         return ret;
2415 }
2416
2417 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2418 {
2419         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2420         int ret = dquot_commit_info(sb, type);
2421
2422         if (ret < 0)
2423                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2424         return ret;
2425 }
2426
2427 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2428 {
2429         *projid = F2FS_I(inode)->i_projid;
2430         return 0;
2431 }
2432
2433 static const struct dquot_operations f2fs_quota_operations = {
2434         .get_reserved_space = f2fs_get_reserved_space,
2435         .write_dquot    = f2fs_dquot_commit,
2436         .acquire_dquot  = f2fs_dquot_acquire,
2437         .release_dquot  = f2fs_dquot_release,
2438         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2439         .write_info     = f2fs_dquot_commit_info,
2440         .alloc_dquot    = dquot_alloc,
2441         .destroy_dquot  = dquot_destroy,
2442         .get_projid     = f2fs_get_projid,
2443         .get_next_id    = dquot_get_next_id,
2444 };
2445
2446 static const struct quotactl_ops f2fs_quotactl_ops = {
2447         .quota_on       = f2fs_quota_on,
2448         .quota_off      = f2fs_quota_off,
2449         .quota_sync     = f2fs_quota_sync,
2450         .get_state      = dquot_get_state,
2451         .set_info       = dquot_set_dqinfo,
2452         .get_dqblk      = dquot_get_dqblk,
2453         .set_dqblk      = dquot_set_dqblk,
2454         .get_nextdqblk  = dquot_get_next_dqblk,
2455 };
2456 #else
2457 int f2fs_quota_sync(struct super_block *sb, int type)
2458 {
2459         return 0;
2460 }
2461
2462 void f2fs_quota_off_umount(struct super_block *sb)
2463 {
2464 }
2465 #endif
2466
2467 static const struct super_operations f2fs_sops = {
2468         .alloc_inode    = f2fs_alloc_inode,
2469         .free_inode     = f2fs_free_inode,
2470         .drop_inode     = f2fs_drop_inode,
2471         .write_inode    = f2fs_write_inode,
2472         .dirty_inode    = f2fs_dirty_inode,
2473         .show_options   = f2fs_show_options,
2474 #ifdef CONFIG_QUOTA
2475         .quota_read     = f2fs_quota_read,
2476         .quota_write    = f2fs_quota_write,
2477         .get_dquots     = f2fs_get_dquots,
2478 #endif
2479         .evict_inode    = f2fs_evict_inode,
2480         .put_super      = f2fs_put_super,
2481         .sync_fs        = f2fs_sync_fs,
2482         .freeze_fs      = f2fs_freeze,
2483         .unfreeze_fs    = f2fs_unfreeze,
2484         .statfs         = f2fs_statfs,
2485         .remount_fs     = f2fs_remount,
2486 };
2487
2488 #ifdef CONFIG_FS_ENCRYPTION
2489 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2490 {
2491         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2492                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2493                                 ctx, len, NULL);
2494 }
2495
2496 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2497                                                         void *fs_data)
2498 {
2499         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2500
2501         /*
2502          * Encrypting the root directory is not allowed because fsck
2503          * expects lost+found directory to exist and remain unencrypted
2504          * if LOST_FOUND feature is enabled.
2505          *
2506          */
2507         if (f2fs_sb_has_lost_found(sbi) &&
2508                         inode->i_ino == F2FS_ROOT_INO(sbi))
2509                 return -EPERM;
2510
2511         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2512                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2513                                 ctx, len, fs_data, XATTR_CREATE);
2514 }
2515
2516 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2517 {
2518         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2519 }
2520
2521 static bool f2fs_has_stable_inodes(struct super_block *sb)
2522 {
2523         return true;
2524 }
2525
2526 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2527                                        int *ino_bits_ret, int *lblk_bits_ret)
2528 {
2529         *ino_bits_ret = 8 * sizeof(nid_t);
2530         *lblk_bits_ret = 8 * sizeof(block_t);
2531 }
2532
2533 static int f2fs_get_num_devices(struct super_block *sb)
2534 {
2535         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2536
2537         if (f2fs_is_multi_device(sbi))
2538                 return sbi->s_ndevs;
2539         return 1;
2540 }
2541
2542 static void f2fs_get_devices(struct super_block *sb,
2543                              struct request_queue **devs)
2544 {
2545         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2546         int i;
2547
2548         for (i = 0; i < sbi->s_ndevs; i++)
2549                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2550 }
2551
2552 static const struct fscrypt_operations f2fs_cryptops = {
2553         .key_prefix             = "f2fs:",
2554         .get_context            = f2fs_get_context,
2555         .set_context            = f2fs_set_context,
2556         .get_dummy_policy       = f2fs_get_dummy_policy,
2557         .empty_dir              = f2fs_empty_dir,
2558         .max_namelen            = F2FS_NAME_LEN,
2559         .has_stable_inodes      = f2fs_has_stable_inodes,
2560         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2561         .get_num_devices        = f2fs_get_num_devices,
2562         .get_devices            = f2fs_get_devices,
2563 };
2564 #endif
2565
2566 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2567                 u64 ino, u32 generation)
2568 {
2569         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2570         struct inode *inode;
2571
2572         if (f2fs_check_nid_range(sbi, ino))
2573                 return ERR_PTR(-ESTALE);
2574
2575         /*
2576          * f2fs_iget isn't quite right if the inode is currently unallocated!
2577          * However f2fs_iget currently does appropriate checks to handle stale
2578          * inodes so everything is OK.
2579          */
2580         inode = f2fs_iget(sb, ino);
2581         if (IS_ERR(inode))
2582                 return ERR_CAST(inode);
2583         if (unlikely(generation && inode->i_generation != generation)) {
2584                 /* we didn't find the right inode.. */
2585                 iput(inode);
2586                 return ERR_PTR(-ESTALE);
2587         }
2588         return inode;
2589 }
2590
2591 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2592                 int fh_len, int fh_type)
2593 {
2594         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2595                                     f2fs_nfs_get_inode);
2596 }
2597
2598 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2599                 int fh_len, int fh_type)
2600 {
2601         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2602                                     f2fs_nfs_get_inode);
2603 }
2604
2605 static const struct export_operations f2fs_export_ops = {
2606         .fh_to_dentry = f2fs_fh_to_dentry,
2607         .fh_to_parent = f2fs_fh_to_parent,
2608         .get_parent = f2fs_get_parent,
2609 };
2610
2611 static loff_t max_file_blocks(void)
2612 {
2613         loff_t result = 0;
2614         loff_t leaf_count = DEF_ADDRS_PER_BLOCK;
2615
2616         /*
2617          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2618          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2619          * space in inode.i_addr, it will be more safe to reassign
2620          * result as zero.
2621          */
2622
2623         /* two direct node blocks */
2624         result += (leaf_count * 2);
2625
2626         /* two indirect node blocks */
2627         leaf_count *= NIDS_PER_BLOCK;
2628         result += (leaf_count * 2);
2629
2630         /* one double indirect node block */
2631         leaf_count *= NIDS_PER_BLOCK;
2632         result += leaf_count;
2633
2634         return result;
2635 }
2636
2637 static int __f2fs_commit_super(struct buffer_head *bh,
2638                         struct f2fs_super_block *super)
2639 {
2640         lock_buffer(bh);
2641         if (super)
2642                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2643         set_buffer_dirty(bh);
2644         unlock_buffer(bh);
2645
2646         /* it's rare case, we can do fua all the time */
2647         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2648 }
2649
2650 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2651                                         struct buffer_head *bh)
2652 {
2653         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2654                                         (bh->b_data + F2FS_SUPER_OFFSET);
2655         struct super_block *sb = sbi->sb;
2656         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2657         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2658         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2659         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2660         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2661         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2662         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2663         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2664         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2665         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2666         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2667         u32 segment_count = le32_to_cpu(raw_super->segment_count);
2668         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2669         u64 main_end_blkaddr = main_blkaddr +
2670                                 (segment_count_main << log_blocks_per_seg);
2671         u64 seg_end_blkaddr = segment0_blkaddr +
2672                                 (segment_count << log_blocks_per_seg);
2673
2674         if (segment0_blkaddr != cp_blkaddr) {
2675                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2676                           segment0_blkaddr, cp_blkaddr);
2677                 return true;
2678         }
2679
2680         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2681                                                         sit_blkaddr) {
2682                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2683                           cp_blkaddr, sit_blkaddr,
2684                           segment_count_ckpt << log_blocks_per_seg);
2685                 return true;
2686         }
2687
2688         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2689                                                         nat_blkaddr) {
2690                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2691                           sit_blkaddr, nat_blkaddr,
2692                           segment_count_sit << log_blocks_per_seg);
2693                 return true;
2694         }
2695
2696         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2697                                                         ssa_blkaddr) {
2698                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2699                           nat_blkaddr, ssa_blkaddr,
2700                           segment_count_nat << log_blocks_per_seg);
2701                 return true;
2702         }
2703
2704         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2705                                                         main_blkaddr) {
2706                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2707                           ssa_blkaddr, main_blkaddr,
2708                           segment_count_ssa << log_blocks_per_seg);
2709                 return true;
2710         }
2711
2712         if (main_end_blkaddr > seg_end_blkaddr) {
2713                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
2714                           main_blkaddr, seg_end_blkaddr,
2715                           segment_count_main << log_blocks_per_seg);
2716                 return true;
2717         } else if (main_end_blkaddr < seg_end_blkaddr) {
2718                 int err = 0;
2719                 char *res;
2720
2721                 /* fix in-memory information all the time */
2722                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2723                                 segment0_blkaddr) >> log_blocks_per_seg);
2724
2725                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2726                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2727                         res = "internally";
2728                 } else {
2729                         err = __f2fs_commit_super(bh, NULL);
2730                         res = err ? "failed" : "done";
2731                 }
2732                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
2733                           res, main_blkaddr, seg_end_blkaddr,
2734                           segment_count_main << log_blocks_per_seg);
2735                 if (err)
2736                         return true;
2737         }
2738         return false;
2739 }
2740
2741 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2742                                 struct buffer_head *bh)
2743 {
2744         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
2745         block_t total_sections, blocks_per_seg;
2746         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2747                                         (bh->b_data + F2FS_SUPER_OFFSET);
2748         unsigned int blocksize;
2749         size_t crc_offset = 0;
2750         __u32 crc = 0;
2751
2752         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
2753                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
2754                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2755                 return -EINVAL;
2756         }
2757
2758         /* Check checksum_offset and crc in superblock */
2759         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2760                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2761                 if (crc_offset !=
2762                         offsetof(struct f2fs_super_block, crc)) {
2763                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
2764                                   crc_offset);
2765                         return -EFSCORRUPTED;
2766                 }
2767                 crc = le32_to_cpu(raw_super->crc);
2768                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2769                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
2770                         return -EFSCORRUPTED;
2771                 }
2772         }
2773
2774         /* Currently, support only 4KB page cache size */
2775         if (F2FS_BLKSIZE != PAGE_SIZE) {
2776                 f2fs_info(sbi, "Invalid page_cache_size (%lu), supports only 4KB",
2777                           PAGE_SIZE);
2778                 return -EFSCORRUPTED;
2779         }
2780
2781         /* Currently, support only 4KB block size */
2782         blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
2783         if (blocksize != F2FS_BLKSIZE) {
2784                 f2fs_info(sbi, "Invalid blocksize (%u), supports only 4KB",
2785                           blocksize);
2786                 return -EFSCORRUPTED;
2787         }
2788
2789         /* check log blocks per segment */
2790         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2791                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
2792                           le32_to_cpu(raw_super->log_blocks_per_seg));
2793                 return -EFSCORRUPTED;
2794         }
2795
2796         /* Currently, support 512/1024/2048/4096 bytes sector size */
2797         if (le32_to_cpu(raw_super->log_sectorsize) >
2798                                 F2FS_MAX_LOG_SECTOR_SIZE ||
2799                 le32_to_cpu(raw_super->log_sectorsize) <
2800                                 F2FS_MIN_LOG_SECTOR_SIZE) {
2801                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
2802                           le32_to_cpu(raw_super->log_sectorsize));
2803                 return -EFSCORRUPTED;
2804         }
2805         if (le32_to_cpu(raw_super->log_sectors_per_block) +
2806                 le32_to_cpu(raw_super->log_sectorsize) !=
2807                         F2FS_MAX_LOG_SECTOR_SIZE) {
2808                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
2809                           le32_to_cpu(raw_super->log_sectors_per_block),
2810                           le32_to_cpu(raw_super->log_sectorsize));
2811                 return -EFSCORRUPTED;
2812         }
2813
2814         segment_count = le32_to_cpu(raw_super->segment_count);
2815         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2816         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2817         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2818         total_sections = le32_to_cpu(raw_super->section_count);
2819
2820         /* blocks_per_seg should be 512, given the above check */
2821         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2822
2823         if (segment_count > F2FS_MAX_SEGMENT ||
2824                                 segment_count < F2FS_MIN_SEGMENTS) {
2825                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
2826                 return -EFSCORRUPTED;
2827         }
2828
2829         if (total_sections > segment_count_main || total_sections < 1 ||
2830                         segs_per_sec > segment_count || !segs_per_sec) {
2831                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
2832                           segment_count, total_sections, segs_per_sec);
2833                 return -EFSCORRUPTED;
2834         }
2835
2836         if (segment_count_main != total_sections * segs_per_sec) {
2837                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
2838                           segment_count_main, total_sections, segs_per_sec);
2839                 return -EFSCORRUPTED;
2840         }
2841
2842         if ((segment_count / segs_per_sec) < total_sections) {
2843                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
2844                           segment_count, segs_per_sec, total_sections);
2845                 return -EFSCORRUPTED;
2846         }
2847
2848         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
2849                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
2850                           segment_count, le64_to_cpu(raw_super->block_count));
2851                 return -EFSCORRUPTED;
2852         }
2853
2854         if (RDEV(0).path[0]) {
2855                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
2856                 int i = 1;
2857
2858                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
2859                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
2860                         i++;
2861                 }
2862                 if (segment_count != dev_seg_count) {
2863                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
2864                                         segment_count, dev_seg_count);
2865                         return -EFSCORRUPTED;
2866                 }
2867         } else {
2868                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
2869                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
2870                         f2fs_info(sbi, "Zoned block device path is missing");
2871                         return -EFSCORRUPTED;
2872                 }
2873         }
2874
2875         if (secs_per_zone > total_sections || !secs_per_zone) {
2876                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
2877                           secs_per_zone, total_sections);
2878                 return -EFSCORRUPTED;
2879         }
2880         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2881                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2882                         (le32_to_cpu(raw_super->extension_count) +
2883                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2884                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
2885                           le32_to_cpu(raw_super->extension_count),
2886                           raw_super->hot_ext_count,
2887                           F2FS_MAX_EXTENSION);
2888                 return -EFSCORRUPTED;
2889         }
2890
2891         if (le32_to_cpu(raw_super->cp_payload) >
2892                                 (blocks_per_seg - F2FS_CP_PACKS)) {
2893                 f2fs_info(sbi, "Insane cp_payload (%u > %u)",
2894                           le32_to_cpu(raw_super->cp_payload),
2895                           blocks_per_seg - F2FS_CP_PACKS);
2896                 return -EFSCORRUPTED;
2897         }
2898
2899         /* check reserved ino info */
2900         if (le32_to_cpu(raw_super->node_ino) != 1 ||
2901                 le32_to_cpu(raw_super->meta_ino) != 2 ||
2902                 le32_to_cpu(raw_super->root_ino) != 3) {
2903                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2904                           le32_to_cpu(raw_super->node_ino),
2905                           le32_to_cpu(raw_super->meta_ino),
2906                           le32_to_cpu(raw_super->root_ino));
2907                 return -EFSCORRUPTED;
2908         }
2909
2910         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
2911         if (sanity_check_area_boundary(sbi, bh))
2912                 return -EFSCORRUPTED;
2913
2914         return 0;
2915 }
2916
2917 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
2918 {
2919         unsigned int total, fsmeta;
2920         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2921         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2922         unsigned int ovp_segments, reserved_segments;
2923         unsigned int main_segs, blocks_per_seg;
2924         unsigned int sit_segs, nat_segs;
2925         unsigned int sit_bitmap_size, nat_bitmap_size;
2926         unsigned int log_blocks_per_seg;
2927         unsigned int segment_count_main;
2928         unsigned int cp_pack_start_sum, cp_payload;
2929         block_t user_block_count, valid_user_blocks;
2930         block_t avail_node_count, valid_node_count;
2931         int i, j;
2932
2933         total = le32_to_cpu(raw_super->segment_count);
2934         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
2935         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
2936         fsmeta += sit_segs;
2937         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
2938         fsmeta += nat_segs;
2939         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
2940         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
2941
2942         if (unlikely(fsmeta >= total))
2943                 return 1;
2944
2945         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2946         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2947
2948         if (unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
2949                         ovp_segments == 0 || reserved_segments == 0)) {
2950                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
2951                 return 1;
2952         }
2953
2954         user_block_count = le64_to_cpu(ckpt->user_block_count);
2955         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2956         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2957         if (!user_block_count || user_block_count >=
2958                         segment_count_main << log_blocks_per_seg) {
2959                 f2fs_err(sbi, "Wrong user_block_count: %u",
2960                          user_block_count);
2961                 return 1;
2962         }
2963
2964         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
2965         if (valid_user_blocks > user_block_count) {
2966                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
2967                          valid_user_blocks, user_block_count);
2968                 return 1;
2969         }
2970
2971         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
2972         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
2973         if (valid_node_count > avail_node_count) {
2974                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
2975                          valid_node_count, avail_node_count);
2976                 return 1;
2977         }
2978
2979         main_segs = le32_to_cpu(raw_super->segment_count_main);
2980         blocks_per_seg = sbi->blocks_per_seg;
2981
2982         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2983                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
2984                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
2985                         return 1;
2986                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
2987                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2988                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
2989                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
2990                                          i, j,
2991                                          le32_to_cpu(ckpt->cur_node_segno[i]));
2992                                 return 1;
2993                         }
2994                 }
2995         }
2996         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
2997                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
2998                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
2999                         return 1;
3000                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3001                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3002                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3003                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3004                                          i, j,
3005                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3006                                 return 1;
3007                         }
3008                 }
3009         }
3010         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3011                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3012                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3013                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3014                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3015                                          i, j,
3016                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3017                                 return 1;
3018                         }
3019                 }
3020         }
3021
3022         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3023         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3024
3025         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3026                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3027                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3028                          sit_bitmap_size, nat_bitmap_size);
3029                 return 1;
3030         }
3031
3032         cp_pack_start_sum = __start_sum_addr(sbi);
3033         cp_payload = __cp_payload(sbi);
3034         if (cp_pack_start_sum < cp_payload + 1 ||
3035                 cp_pack_start_sum > blocks_per_seg - 1 -
3036                         NR_CURSEG_PERSIST_TYPE) {
3037                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3038                          cp_pack_start_sum);
3039                 return 1;
3040         }
3041
3042         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3043                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3044                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3045                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3046                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3047                           le32_to_cpu(ckpt->checksum_offset));
3048                 return 1;
3049         }
3050
3051         if (unlikely(f2fs_cp_error(sbi))) {
3052                 f2fs_err(sbi, "A bug case: need to run fsck");
3053                 return 1;
3054         }
3055         return 0;
3056 }
3057
3058 static void init_sb_info(struct f2fs_sb_info *sbi)
3059 {
3060         struct f2fs_super_block *raw_super = sbi->raw_super;
3061         int i;
3062
3063         sbi->log_sectors_per_block =
3064                 le32_to_cpu(raw_super->log_sectors_per_block);
3065         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3066         sbi->blocksize = 1 << sbi->log_blocksize;
3067         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3068         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3069         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3070         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3071         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3072         sbi->total_node_count =
3073                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3074                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3075         sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
3076         sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
3077         sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
3078         sbi->cur_victim_sec = NULL_SECNO;
3079         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3080         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3081         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3082         sbi->migration_granularity = sbi->segs_per_sec;
3083
3084         sbi->dir_level = DEF_DIR_LEVEL;
3085         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3086         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3087         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3088         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3089         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3090         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3091                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3092         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3093
3094         for (i = 0; i < NR_COUNT_TYPE; i++)
3095                 atomic_set(&sbi->nr_pages[i], 0);
3096
3097         for (i = 0; i < META; i++)
3098                 atomic_set(&sbi->wb_sync_req[i], 0);
3099
3100         INIT_LIST_HEAD(&sbi->s_list);
3101         mutex_init(&sbi->umount_mutex);
3102         init_rwsem(&sbi->io_order_lock);
3103         spin_lock_init(&sbi->cp_lock);
3104
3105         sbi->dirty_device = 0;
3106         spin_lock_init(&sbi->dev_lock);
3107
3108         init_rwsem(&sbi->sb_lock);
3109         init_rwsem(&sbi->pin_sem);
3110 }
3111
3112 static int init_percpu_info(struct f2fs_sb_info *sbi)
3113 {
3114         int err;
3115
3116         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3117         if (err)
3118                 return err;
3119
3120         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3121                                                                 GFP_KERNEL);
3122         if (err)
3123                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3124
3125         return err;
3126 }
3127
3128 #ifdef CONFIG_BLK_DEV_ZONED
3129
3130 struct f2fs_report_zones_args {
3131         struct f2fs_dev_info *dev;
3132         bool zone_cap_mismatch;
3133 };
3134
3135 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3136                               void *data)
3137 {
3138         struct f2fs_report_zones_args *rz_args = data;
3139
3140         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3141                 return 0;
3142
3143         set_bit(idx, rz_args->dev->blkz_seq);
3144         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3145                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3146         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3147                 rz_args->zone_cap_mismatch = true;
3148
3149         return 0;
3150 }
3151
3152 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3153 {
3154         struct block_device *bdev = FDEV(devi).bdev;
3155         sector_t nr_sectors = bdev->bd_part->nr_sects;
3156         struct f2fs_report_zones_args rep_zone_arg;
3157         int ret;
3158
3159         if (!f2fs_sb_has_blkzoned(sbi))
3160                 return 0;
3161
3162         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3163                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3164                 return -EINVAL;
3165         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3166         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3167                                 __ilog2_u32(sbi->blocks_per_blkz))
3168                 return -EINVAL;
3169         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3170         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3171                                         sbi->log_blocks_per_blkz;
3172         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3173                 FDEV(devi).nr_blkz++;
3174
3175         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3176                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3177                                         * sizeof(unsigned long),
3178                                         GFP_KERNEL);
3179         if (!FDEV(devi).blkz_seq)
3180                 return -ENOMEM;
3181
3182         /* Get block zones type and zone-capacity */
3183         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3184                                         FDEV(devi).nr_blkz * sizeof(block_t),
3185                                         GFP_KERNEL);
3186         if (!FDEV(devi).zone_capacity_blocks)
3187                 return -ENOMEM;
3188
3189         rep_zone_arg.dev = &FDEV(devi);
3190         rep_zone_arg.zone_cap_mismatch = false;
3191
3192         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3193                                   &rep_zone_arg);
3194         if (ret < 0)
3195                 return ret;
3196
3197         if (!rep_zone_arg.zone_cap_mismatch) {
3198                 kfree(FDEV(devi).zone_capacity_blocks);
3199                 FDEV(devi).zone_capacity_blocks = NULL;
3200         }
3201
3202         return 0;
3203 }
3204 #endif
3205
3206 /*
3207  * Read f2fs raw super block.
3208  * Because we have two copies of super block, so read both of them
3209  * to get the first valid one. If any one of them is broken, we pass
3210  * them recovery flag back to the caller.
3211  */
3212 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3213                         struct f2fs_super_block **raw_super,
3214                         int *valid_super_block, int *recovery)
3215 {
3216         struct super_block *sb = sbi->sb;
3217         int block;
3218         struct buffer_head *bh;
3219         struct f2fs_super_block *super;
3220         int err = 0;
3221
3222         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3223         if (!super)
3224                 return -ENOMEM;
3225
3226         for (block = 0; block < 2; block++) {
3227                 bh = sb_bread(sb, block);
3228                 if (!bh) {
3229                         f2fs_err(sbi, "Unable to read %dth superblock",
3230                                  block + 1);
3231                         err = -EIO;
3232                         *recovery = 1;
3233                         continue;
3234                 }
3235
3236                 /* sanity checking of raw super */
3237                 err = sanity_check_raw_super(sbi, bh);
3238                 if (err) {
3239                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3240                                  block + 1);
3241                         brelse(bh);
3242                         *recovery = 1;
3243                         continue;
3244                 }
3245
3246                 if (!*raw_super) {
3247                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3248                                                         sizeof(*super));
3249                         *valid_super_block = block;
3250                         *raw_super = super;
3251                 }
3252                 brelse(bh);
3253         }
3254
3255         /* No valid superblock */
3256         if (!*raw_super)
3257                 kfree(super);
3258         else
3259                 err = 0;
3260
3261         return err;
3262 }
3263
3264 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3265 {
3266         struct buffer_head *bh;
3267         __u32 crc = 0;
3268         int err;
3269
3270         if ((recover && f2fs_readonly(sbi->sb)) ||
3271                                 bdev_read_only(sbi->sb->s_bdev)) {
3272                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3273                 return -EROFS;
3274         }
3275
3276         /* we should update superblock crc here */
3277         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3278                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3279                                 offsetof(struct f2fs_super_block, crc));
3280                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3281         }
3282
3283         /* write back-up superblock first */
3284         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3285         if (!bh)
3286                 return -EIO;
3287         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3288         brelse(bh);
3289
3290         /* if we are in recovery path, skip writing valid superblock */
3291         if (recover || err)
3292                 return err;
3293
3294         /* write current valid superblock */
3295         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3296         if (!bh)
3297                 return -EIO;
3298         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3299         brelse(bh);
3300         return err;
3301 }
3302
3303 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3304 {
3305         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3306         unsigned int max_devices = MAX_DEVICES;
3307         int i;
3308
3309         /* Initialize single device information */
3310         if (!RDEV(0).path[0]) {
3311                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3312                         return 0;
3313                 max_devices = 1;
3314         }
3315
3316         /*
3317          * Initialize multiple devices information, or single
3318          * zoned block device information.
3319          */
3320         sbi->devs = f2fs_kzalloc(sbi,
3321                                  array_size(max_devices,
3322                                             sizeof(struct f2fs_dev_info)),
3323                                  GFP_KERNEL);
3324         if (!sbi->devs)
3325                 return -ENOMEM;
3326
3327         for (i = 0; i < max_devices; i++) {
3328
3329                 if (i > 0 && !RDEV(i).path[0])
3330                         break;
3331
3332                 if (max_devices == 1) {
3333                         /* Single zoned block device mount */
3334                         FDEV(0).bdev =
3335                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3336                                         sbi->sb->s_mode, sbi->sb->s_type);
3337                 } else {
3338                         /* Multi-device mount */
3339                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3340                         FDEV(i).total_segments =
3341                                 le32_to_cpu(RDEV(i).total_segments);
3342                         if (i == 0) {
3343                                 FDEV(i).start_blk = 0;
3344                                 FDEV(i).end_blk = FDEV(i).start_blk +
3345                                     (FDEV(i).total_segments <<
3346                                     sbi->log_blocks_per_seg) - 1 +
3347                                     le32_to_cpu(raw_super->segment0_blkaddr);
3348                         } else {
3349                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3350                                 FDEV(i).end_blk = FDEV(i).start_blk +
3351                                         (FDEV(i).total_segments <<
3352                                         sbi->log_blocks_per_seg) - 1;
3353                         }
3354                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3355                                         sbi->sb->s_mode, sbi->sb->s_type);
3356                 }
3357                 if (IS_ERR(FDEV(i).bdev))
3358                         return PTR_ERR(FDEV(i).bdev);
3359
3360                 /* to release errored devices */
3361                 sbi->s_ndevs = i + 1;
3362
3363 #ifdef CONFIG_BLK_DEV_ZONED
3364                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3365                                 !f2fs_sb_has_blkzoned(sbi)) {
3366                         f2fs_err(sbi, "Zoned block device feature not enabled\n");
3367                         return -EINVAL;
3368                 }
3369                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3370                         if (init_blkz_info(sbi, i)) {
3371                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3372                                 return -EINVAL;
3373                         }
3374                         if (max_devices == 1)
3375                                 break;
3376                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3377                                   i, FDEV(i).path,
3378                                   FDEV(i).total_segments,
3379                                   FDEV(i).start_blk, FDEV(i).end_blk,
3380                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3381                                   "Host-aware" : "Host-managed");
3382                         continue;
3383                 }
3384 #endif
3385                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3386                           i, FDEV(i).path,
3387                           FDEV(i).total_segments,
3388                           FDEV(i).start_blk, FDEV(i).end_blk);
3389         }
3390         f2fs_info(sbi,
3391                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3392         return 0;
3393 }
3394
3395 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3396 {
3397 #ifdef CONFIG_UNICODE
3398         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3399                 const struct f2fs_sb_encodings *encoding_info;
3400                 struct unicode_map *encoding;
3401                 __u16 encoding_flags;
3402
3403                 if (f2fs_sb_has_encrypt(sbi)) {
3404                         f2fs_err(sbi,
3405                                 "Can't mount with encoding and encryption");
3406                         return -EINVAL;
3407                 }
3408
3409                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3410                                           &encoding_flags)) {
3411                         f2fs_err(sbi,
3412                                  "Encoding requested by superblock is unknown");
3413                         return -EINVAL;
3414                 }
3415
3416                 encoding = utf8_load(encoding_info->version);
3417                 if (IS_ERR(encoding)) {
3418                         f2fs_err(sbi,
3419                                  "can't mount with superblock charset: %s-%s "
3420                                  "not supported by the kernel. flags: 0x%x.",
3421                                  encoding_info->name, encoding_info->version,
3422                                  encoding_flags);
3423                         return PTR_ERR(encoding);
3424                 }
3425                 f2fs_info(sbi, "Using encoding defined by superblock: "
3426                          "%s-%s with flags 0x%hx", encoding_info->name,
3427                          encoding_info->version?:"\b", encoding_flags);
3428
3429                 sbi->sb->s_encoding = encoding;
3430                 sbi->sb->s_encoding_flags = encoding_flags;
3431                 sbi->sb->s_d_op = &f2fs_dentry_ops;
3432         }
3433 #else
3434         if (f2fs_sb_has_casefold(sbi)) {
3435                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3436                 return -EINVAL;
3437         }
3438 #endif
3439         return 0;
3440 }
3441
3442 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3443 {
3444         struct f2fs_sm_info *sm_i = SM_I(sbi);
3445
3446         /* adjust parameters according to the volume size */
3447         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3448                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3449                 sm_i->dcc_info->discard_granularity = 1;
3450                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3451         }
3452
3453         sbi->readdir_ra = 1;
3454 }
3455
3456 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3457 {
3458         struct f2fs_sb_info *sbi;
3459         struct f2fs_super_block *raw_super;
3460         struct inode *root;
3461         int err;
3462         bool skip_recovery = false, need_fsck = false;
3463         char *options = NULL;
3464         int recovery, i, valid_super_block;
3465         struct curseg_info *seg_i;
3466         int retry_cnt = 1;
3467
3468 try_onemore:
3469         err = -EINVAL;
3470         raw_super = NULL;
3471         valid_super_block = -1;
3472         recovery = 0;
3473
3474         /* allocate memory for f2fs-specific super block info */
3475         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3476         if (!sbi)
3477                 return -ENOMEM;
3478
3479         sbi->sb = sb;
3480
3481         /* Load the checksum driver */
3482         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3483         if (IS_ERR(sbi->s_chksum_driver)) {
3484                 f2fs_err(sbi, "Cannot load crc32 driver.");
3485                 err = PTR_ERR(sbi->s_chksum_driver);
3486                 sbi->s_chksum_driver = NULL;
3487                 goto free_sbi;
3488         }
3489
3490         /* set a block size */
3491         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3492                 f2fs_err(sbi, "unable to set blocksize");
3493                 goto free_sbi;
3494         }
3495
3496         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3497                                                                 &recovery);
3498         if (err)
3499                 goto free_sbi;
3500
3501         sb->s_fs_info = sbi;
3502         sbi->raw_super = raw_super;
3503
3504         /* precompute checksum seed for metadata */
3505         if (f2fs_sb_has_inode_chksum(sbi))
3506                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3507                                                 sizeof(raw_super->uuid));
3508
3509         default_options(sbi);
3510         /* parse mount options */
3511         options = kstrdup((const char *)data, GFP_KERNEL);
3512         if (data && !options) {
3513                 err = -ENOMEM;
3514                 goto free_sb_buf;
3515         }
3516
3517         err = parse_options(sb, options, false);
3518         if (err)
3519                 goto free_options;
3520
3521         sbi->max_file_blocks = max_file_blocks();
3522         sb->s_maxbytes = sbi->max_file_blocks <<
3523                                 le32_to_cpu(raw_super->log_blocksize);
3524         sb->s_max_links = F2FS_LINK_MAX;
3525
3526         err = f2fs_setup_casefold(sbi);
3527         if (err)
3528                 goto free_options;
3529
3530 #ifdef CONFIG_QUOTA
3531         sb->dq_op = &f2fs_quota_operations;
3532         sb->s_qcop = &f2fs_quotactl_ops;
3533         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3534
3535         if (f2fs_sb_has_quota_ino(sbi)) {
3536                 for (i = 0; i < MAXQUOTAS; i++) {
3537                         if (f2fs_qf_ino(sbi->sb, i))
3538                                 sbi->nquota_files++;
3539                 }
3540         }
3541 #endif
3542
3543         sb->s_op = &f2fs_sops;
3544 #ifdef CONFIG_FS_ENCRYPTION
3545         sb->s_cop = &f2fs_cryptops;
3546 #endif
3547 #ifdef CONFIG_FS_VERITY
3548         sb->s_vop = &f2fs_verityops;
3549 #endif
3550         sb->s_xattr = f2fs_xattr_handlers;
3551         sb->s_export_op = &f2fs_export_ops;
3552         sb->s_magic = F2FS_SUPER_MAGIC;
3553         sb->s_time_gran = 1;
3554         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3555                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3556         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3557         sb->s_iflags |= SB_I_CGROUPWB;
3558
3559         /* init f2fs-specific super block info */
3560         sbi->valid_super_block = valid_super_block;
3561         init_rwsem(&sbi->gc_lock);
3562         mutex_init(&sbi->writepages);
3563         mutex_init(&sbi->cp_mutex);
3564         init_rwsem(&sbi->node_write);
3565         init_rwsem(&sbi->node_change);
3566
3567         /* disallow all the data/node/meta page writes */
3568         set_sbi_flag(sbi, SBI_POR_DOING);
3569         spin_lock_init(&sbi->stat_lock);
3570
3571         /* init iostat info */
3572         spin_lock_init(&sbi->iostat_lock);
3573         sbi->iostat_enable = false;
3574         sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
3575
3576         for (i = 0; i < NR_PAGE_TYPE; i++) {
3577                 int n = (i == META) ? 1: NR_TEMP_TYPE;
3578                 int j;
3579
3580                 sbi->write_io[i] =
3581                         f2fs_kmalloc(sbi,
3582                                      array_size(n,
3583                                                 sizeof(struct f2fs_bio_info)),
3584                                      GFP_KERNEL);
3585                 if (!sbi->write_io[i]) {
3586                         err = -ENOMEM;
3587                         goto free_bio_info;
3588                 }
3589
3590                 for (j = HOT; j < n; j++) {
3591                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
3592                         sbi->write_io[i][j].sbi = sbi;
3593                         sbi->write_io[i][j].bio = NULL;
3594                         spin_lock_init(&sbi->write_io[i][j].io_lock);
3595                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3596                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3597                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3598                 }
3599         }
3600
3601         init_rwsem(&sbi->cp_rwsem);
3602         init_rwsem(&sbi->quota_sem);
3603         init_waitqueue_head(&sbi->cp_wait);
3604         init_sb_info(sbi);
3605
3606         err = init_percpu_info(sbi);
3607         if (err)
3608                 goto free_bio_info;
3609
3610         if (F2FS_IO_ALIGNED(sbi)) {
3611                 sbi->write_io_dummy =
3612                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3613                 if (!sbi->write_io_dummy) {
3614                         err = -ENOMEM;
3615                         goto free_percpu;
3616                 }
3617         }
3618
3619         /* init per sbi slab cache */
3620         err = f2fs_init_xattr_caches(sbi);
3621         if (err)
3622                 goto free_io_dummy;
3623         err = f2fs_init_page_array_cache(sbi);
3624         if (err)
3625                 goto free_xattr_cache;
3626
3627         /* get an inode for meta space */
3628         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3629         if (IS_ERR(sbi->meta_inode)) {
3630                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3631                 err = PTR_ERR(sbi->meta_inode);
3632                 goto free_page_array_cache;
3633         }
3634
3635         err = f2fs_get_valid_checkpoint(sbi);
3636         if (err) {
3637                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3638                 goto free_meta_inode;
3639         }
3640
3641         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3642                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3643         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3644                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3645                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3646         }
3647
3648         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3649                 set_sbi_flag(sbi, SBI_NEED_FSCK);
3650
3651         /* Initialize device list */
3652         err = f2fs_scan_devices(sbi);
3653         if (err) {
3654                 f2fs_err(sbi, "Failed to find devices");
3655                 goto free_devices;
3656         }
3657
3658         err = f2fs_init_post_read_wq(sbi);
3659         if (err) {
3660                 f2fs_err(sbi, "Failed to initialize post read workqueue");
3661                 goto free_devices;
3662         }
3663
3664         sbi->total_valid_node_count =
3665                                 le32_to_cpu(sbi->ckpt->valid_node_count);
3666         percpu_counter_set(&sbi->total_valid_inode_count,
3667                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
3668         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3669         sbi->total_valid_block_count =
3670                                 le64_to_cpu(sbi->ckpt->valid_block_count);
3671         sbi->last_valid_block_count = sbi->total_valid_block_count;
3672         sbi->reserved_blocks = 0;
3673         sbi->current_reserved_blocks = 0;
3674         limit_reserve_root(sbi);
3675         adjust_unusable_cap_perc(sbi);
3676
3677         for (i = 0; i < NR_INODE_TYPE; i++) {
3678                 INIT_LIST_HEAD(&sbi->inode_list[i]);
3679                 spin_lock_init(&sbi->inode_lock[i]);
3680         }
3681         mutex_init(&sbi->flush_lock);
3682
3683         f2fs_init_extent_cache_info(sbi);
3684
3685         f2fs_init_ino_entry_info(sbi);
3686
3687         f2fs_init_fsync_node_info(sbi);
3688
3689         /* setup f2fs internal modules */
3690         err = f2fs_build_segment_manager(sbi);
3691         if (err) {
3692                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
3693                          err);
3694                 goto free_sm;
3695         }
3696         err = f2fs_build_node_manager(sbi);
3697         if (err) {
3698                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
3699                          err);
3700                 goto free_nm;
3701         }
3702
3703         /* For write statistics */
3704         if (sb->s_bdev->bd_part)
3705                 sbi->sectors_written_start =
3706                         (u64)part_stat_read(sb->s_bdev->bd_part,
3707                                             sectors[STAT_WRITE]);
3708
3709         /* Read accumulated write IO statistics if exists */
3710         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3711         if (__exist_node_summaries(sbi))
3712                 sbi->kbytes_written =
3713                         le64_to_cpu(seg_i->journal->info.kbytes_written);
3714
3715         f2fs_build_gc_manager(sbi);
3716
3717         err = f2fs_build_stats(sbi);
3718         if (err)
3719                 goto free_nm;
3720
3721         /* get an inode for node space */
3722         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3723         if (IS_ERR(sbi->node_inode)) {
3724                 f2fs_err(sbi, "Failed to read node inode");
3725                 err = PTR_ERR(sbi->node_inode);
3726                 goto free_stats;
3727         }
3728
3729         /* read root inode and dentry */
3730         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3731         if (IS_ERR(root)) {
3732                 f2fs_err(sbi, "Failed to read root inode");
3733                 err = PTR_ERR(root);
3734                 goto free_node_inode;
3735         }
3736         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3737                         !root->i_size || !root->i_nlink) {
3738                 iput(root);
3739                 err = -EINVAL;
3740                 goto free_node_inode;
3741         }
3742
3743         sb->s_root = d_make_root(root); /* allocate root dentry */
3744         if (!sb->s_root) {
3745                 err = -ENOMEM;
3746                 goto free_node_inode;
3747         }
3748
3749         err = f2fs_register_sysfs(sbi);
3750         if (err)
3751                 goto free_root_inode;
3752
3753 #ifdef CONFIG_QUOTA
3754         /* Enable quota usage during mount */
3755         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3756                 err = f2fs_enable_quotas(sb);
3757                 if (err)
3758                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
3759         }
3760 #endif
3761         /* if there are any orphan inodes, free them */
3762         err = f2fs_recover_orphan_inodes(sbi);
3763         if (err)
3764                 goto free_meta;
3765
3766         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3767                 goto reset_checkpoint;
3768
3769         /* recover fsynced data */
3770         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
3771                         !test_opt(sbi, NORECOVERY)) {
3772                 /*
3773                  * mount should be failed, when device has readonly mode, and
3774                  * previous checkpoint was not done by clean system shutdown.
3775                  */
3776                 if (f2fs_hw_is_readonly(sbi)) {
3777                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3778                                 err = -EROFS;
3779                                 f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
3780                                 goto free_meta;
3781                         }
3782                         f2fs_info(sbi, "write access unavailable, skipping recovery");
3783                         goto reset_checkpoint;
3784                 }
3785
3786                 if (need_fsck)
3787                         set_sbi_flag(sbi, SBI_NEED_FSCK);
3788
3789                 if (skip_recovery)
3790                         goto reset_checkpoint;
3791
3792                 err = f2fs_recover_fsync_data(sbi, false);
3793                 if (err < 0) {
3794                         if (err != -ENOMEM)
3795                                 skip_recovery = true;
3796                         need_fsck = true;
3797                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
3798                                  err);
3799                         goto free_meta;
3800                 }
3801         } else {
3802                 err = f2fs_recover_fsync_data(sbi, true);
3803
3804                 if (!f2fs_readonly(sb) && err > 0) {
3805                         err = -EINVAL;
3806                         f2fs_err(sbi, "Need to recover fsync data");
3807                         goto free_meta;
3808                 }
3809         }
3810
3811         /*
3812          * If the f2fs is not readonly and fsync data recovery succeeds,
3813          * check zoned block devices' write pointer consistency.
3814          */
3815         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
3816                 err = f2fs_check_write_pointer(sbi);
3817                 if (err)
3818                         goto free_meta;
3819         }
3820
3821 reset_checkpoint:
3822         f2fs_init_inmem_curseg(sbi);
3823
3824         /* f2fs_recover_fsync_data() cleared this already */
3825         clear_sbi_flag(sbi, SBI_POR_DOING);
3826
3827         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3828                 err = f2fs_disable_checkpoint(sbi);
3829                 if (err)
3830                         goto sync_free_meta;
3831         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3832                 f2fs_enable_checkpoint(sbi);
3833         }
3834
3835         /*
3836          * If filesystem is not mounted as read-only then
3837          * do start the gc_thread.
3838          */
3839         if (F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF && !f2fs_readonly(sb)) {
3840                 /* After POR, we can run background GC thread.*/
3841                 err = f2fs_start_gc_thread(sbi);
3842                 if (err)
3843                         goto sync_free_meta;
3844         }
3845         kvfree(options);
3846
3847         /* recover broken superblock */
3848         if (recovery) {
3849                 err = f2fs_commit_super(sbi, true);
3850                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
3851                           sbi->valid_super_block ? 1 : 2, err);
3852         }
3853
3854         f2fs_join_shrinker(sbi);
3855
3856         f2fs_tuning_parameters(sbi);
3857
3858         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
3859                     cur_cp_version(F2FS_CKPT(sbi)));
3860         f2fs_update_time(sbi, CP_TIME);
3861         f2fs_update_time(sbi, REQ_TIME);
3862         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3863         return 0;
3864
3865 sync_free_meta:
3866         /* safe to flush all the data */
3867         sync_filesystem(sbi->sb);
3868         retry_cnt = 0;
3869
3870 free_meta:
3871 #ifdef CONFIG_QUOTA
3872         f2fs_truncate_quota_inode_pages(sb);
3873         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
3874                 f2fs_quota_off_umount(sbi->sb);
3875 #endif
3876         /*
3877          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
3878          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
3879          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
3880          * falls into an infinite loop in f2fs_sync_meta_pages().
3881          */
3882         truncate_inode_pages_final(META_MAPPING(sbi));
3883         /* evict some inodes being cached by GC */
3884         evict_inodes(sb);
3885         f2fs_unregister_sysfs(sbi);
3886 free_root_inode:
3887         dput(sb->s_root);
3888         sb->s_root = NULL;
3889 free_node_inode:
3890         f2fs_release_ino_entry(sbi, true);
3891         truncate_inode_pages_final(NODE_MAPPING(sbi));
3892         iput(sbi->node_inode);
3893         sbi->node_inode = NULL;
3894 free_stats:
3895         f2fs_destroy_stats(sbi);
3896 free_nm:
3897         f2fs_destroy_node_manager(sbi);
3898 free_sm:
3899         f2fs_destroy_segment_manager(sbi);
3900         f2fs_destroy_post_read_wq(sbi);
3901 free_devices:
3902         destroy_device_list(sbi);
3903         kvfree(sbi->ckpt);
3904 free_meta_inode:
3905         make_bad_inode(sbi->meta_inode);
3906         iput(sbi->meta_inode);
3907         sbi->meta_inode = NULL;
3908 free_page_array_cache:
3909         f2fs_destroy_page_array_cache(sbi);
3910 free_xattr_cache:
3911         f2fs_destroy_xattr_caches(sbi);
3912 free_io_dummy:
3913         mempool_destroy(sbi->write_io_dummy);
3914 free_percpu:
3915         destroy_percpu_info(sbi);
3916 free_bio_info:
3917         for (i = 0; i < NR_PAGE_TYPE; i++)
3918                 kvfree(sbi->write_io[i]);
3919
3920 #ifdef CONFIG_UNICODE
3921         utf8_unload(sb->s_encoding);
3922 #endif
3923 free_options:
3924 #ifdef CONFIG_QUOTA
3925         for (i = 0; i < MAXQUOTAS; i++)
3926                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
3927 #endif
3928         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
3929         kvfree(options);
3930 free_sb_buf:
3931         kfree(raw_super);
3932 free_sbi:
3933         if (sbi->s_chksum_driver)
3934                 crypto_free_shash(sbi->s_chksum_driver);
3935         kfree(sbi);
3936
3937         /* give only one another chance */
3938         if (retry_cnt > 0 && skip_recovery) {
3939                 retry_cnt--;
3940                 shrink_dcache_sb(sb);
3941                 goto try_onemore;
3942         }
3943         return err;
3944 }
3945
3946 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
3947                         const char *dev_name, void *data)
3948 {
3949         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
3950 }
3951
3952 static void kill_f2fs_super(struct super_block *sb)
3953 {
3954         if (sb->s_root) {
3955                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3956
3957                 set_sbi_flag(sbi, SBI_IS_CLOSE);
3958                 f2fs_stop_gc_thread(sbi);
3959                 f2fs_stop_discard_thread(sbi);
3960
3961                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
3962                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3963                         struct cp_control cpc = {
3964                                 .reason = CP_UMOUNT,
3965                         };
3966                         f2fs_write_checkpoint(sbi, &cpc);
3967                 }
3968
3969                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
3970                         sb->s_flags &= ~SB_RDONLY;
3971         }
3972         kill_block_super(sb);
3973 }
3974
3975 static struct file_system_type f2fs_fs_type = {
3976         .owner          = THIS_MODULE,
3977         .name           = "f2fs",
3978         .mount          = f2fs_mount,
3979         .kill_sb        = kill_f2fs_super,
3980         .fs_flags       = FS_REQUIRES_DEV,
3981 };
3982 MODULE_ALIAS_FS("f2fs");
3983
3984 static int __init init_inodecache(void)
3985 {
3986         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
3987                         sizeof(struct f2fs_inode_info), 0,
3988                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
3989         if (!f2fs_inode_cachep)
3990                 return -ENOMEM;
3991         return 0;
3992 }
3993
3994 static void destroy_inodecache(void)
3995 {
3996         /*
3997          * Make sure all delayed rcu free inodes are flushed before we
3998          * destroy cache.
3999          */
4000         rcu_barrier();
4001         kmem_cache_destroy(f2fs_inode_cachep);
4002 }
4003
4004 static int __init init_f2fs_fs(void)
4005 {
4006         int err;
4007
4008         if (PAGE_SIZE != F2FS_BLKSIZE) {
4009                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4010                                 PAGE_SIZE, F2FS_BLKSIZE);
4011                 return -EINVAL;
4012         }
4013
4014         f2fs_build_trace_ios();
4015
4016         err = init_inodecache();
4017         if (err)
4018                 goto fail;
4019         err = f2fs_create_node_manager_caches();
4020         if (err)
4021                 goto free_inodecache;
4022         err = f2fs_create_segment_manager_caches();
4023         if (err)
4024                 goto free_node_manager_caches;
4025         err = f2fs_create_checkpoint_caches();
4026         if (err)
4027                 goto free_segment_manager_caches;
4028         err = f2fs_create_extent_cache();
4029         if (err)
4030                 goto free_checkpoint_caches;
4031         err = f2fs_create_garbage_collection_cache();
4032         if (err)
4033                 goto free_extent_cache;
4034         err = f2fs_init_sysfs();
4035         if (err)
4036                 goto free_garbage_collection_cache;
4037         err = register_shrinker(&f2fs_shrinker_info);
4038         if (err)
4039                 goto free_sysfs;
4040         err = register_filesystem(&f2fs_fs_type);
4041         if (err)
4042                 goto free_shrinker;
4043         f2fs_create_root_stats();
4044         err = f2fs_init_post_read_processing();
4045         if (err)
4046                 goto free_root_stats;
4047         err = f2fs_init_bio_entry_cache();
4048         if (err)
4049                 goto free_post_read;
4050         err = f2fs_init_bioset();
4051         if (err)
4052                 goto free_bio_enrty_cache;
4053         err = f2fs_init_compress_mempool();
4054         if (err)
4055                 goto free_bioset;
4056         err = f2fs_init_compress_cache();
4057         if (err)
4058                 goto free_compress_mempool;
4059         return 0;
4060 free_compress_mempool:
4061         f2fs_destroy_compress_mempool();
4062 free_bioset:
4063         f2fs_destroy_bioset();
4064 free_bio_enrty_cache:
4065         f2fs_destroy_bio_entry_cache();
4066 free_post_read:
4067         f2fs_destroy_post_read_processing();
4068 free_root_stats:
4069         f2fs_destroy_root_stats();
4070         unregister_filesystem(&f2fs_fs_type);
4071 free_shrinker:
4072         unregister_shrinker(&f2fs_shrinker_info);
4073 free_sysfs:
4074         f2fs_exit_sysfs();
4075 free_garbage_collection_cache:
4076         f2fs_destroy_garbage_collection_cache();
4077 free_extent_cache:
4078         f2fs_destroy_extent_cache();
4079 free_checkpoint_caches:
4080         f2fs_destroy_checkpoint_caches();
4081 free_segment_manager_caches:
4082         f2fs_destroy_segment_manager_caches();
4083 free_node_manager_caches:
4084         f2fs_destroy_node_manager_caches();
4085 free_inodecache:
4086         destroy_inodecache();
4087 fail:
4088         return err;
4089 }
4090
4091 static void __exit exit_f2fs_fs(void)
4092 {
4093         f2fs_destroy_compress_cache();
4094         f2fs_destroy_compress_mempool();
4095         f2fs_destroy_bioset();
4096         f2fs_destroy_bio_entry_cache();
4097         f2fs_destroy_post_read_processing();
4098         f2fs_destroy_root_stats();
4099         unregister_filesystem(&f2fs_fs_type);
4100         unregister_shrinker(&f2fs_shrinker_info);
4101         f2fs_exit_sysfs();
4102         f2fs_destroy_garbage_collection_cache();
4103         f2fs_destroy_extent_cache();
4104         f2fs_destroy_checkpoint_caches();
4105         f2fs_destroy_segment_manager_caches();
4106         f2fs_destroy_node_manager_caches();
4107         destroy_inodecache();
4108         f2fs_destroy_trace_ios();
4109 }
4110
4111 module_init(init_f2fs_fs)
4112 module_exit(exit_f2fs_fs)
4113
4114 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4115 MODULE_DESCRIPTION("Flash Friendly File System");
4116 MODULE_LICENSE("GPL");
4117