fs/f2fs/super.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/super.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/fs.h>
  11 #include <linux/statfs.h>
  12 #include <linux/buffer_head.h>
  13 #include <linux/backing-dev.h>
  14 #include <linux/kthread.h>
  15 #include <linux/parser.h>
  16 #include <linux/mount.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/random.h>
  20 #include <linux/exportfs.h>
  21 #include <linux/blkdev.h>
  22 #include <linux/quotaops.h>
  23 #include <linux/f2fs_fs.h>
  24 #include <linux/sysfs.h>
  25 #include <linux/quota.h>
  26 #include <linux/unicode.h>
  27 #include <linux/part_stat.h>
  28 #include <linux/zstd.h>
  29 #include <linux/lz4.h>
  30
  31 #include "f2fs.h"
  32 #include "node.h"
  33 #include "segment.h"
  34 #include "xattr.h"
  35 #include "gc.h"
  36
  37 #define CREATE_TRACE_POINTS
  38 #include <trace/events/f2fs.h>
  39
  40 static struct kmem_cache *f2fs_inode_cachep;
  41
  42 #ifdef CONFIG_F2FS_FAULT_INJECTION
  43
  44 const char *f2fs_fault_name[FAULT_MAX] = {
  45         [FAULT_KMALLOC]         = "kmalloc",
  46         [FAULT_KVMALLOC]        = "kvmalloc",
  47         [FAULT_PAGE_ALLOC]      = "page alloc",
  48         [FAULT_PAGE_GET]        = "page get",
  49         [FAULT_ALLOC_NID]       = "alloc nid",
  50         [FAULT_ORPHAN]          = "orphan",
  51         [FAULT_BLOCK]           = "no more block",
  52         [FAULT_DIR_DEPTH]       = "too big dir depth",
  53         [FAULT_EVICT_INODE]     = "evict_inode fail",
  54         [FAULT_TRUNCATE]        = "truncate fail",
  55         [FAULT_READ_IO]         = "read IO error",
  56         [FAULT_CHECKPOINT]      = "checkpoint error",
  57         [FAULT_DISCARD]         = "discard error",
  58         [FAULT_WRITE_IO]        = "write IO error",
  59         [FAULT_SLAB_ALLOC]      = "slab alloc",
  60 };
  61
  62 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  63                                                         unsigned int type)
  64 {
  65         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  66
  67         if (rate) {
  68                 atomic_set(&ffi->inject_ops, 0);
  69                 ffi->inject_rate = rate;
  70         }
  71
  72         if (type)
  73                 ffi->inject_type = type;
  74
  75         if (!rate && !type)
  76                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  77 }
  78 #endif
  79
  80 /* f2fs-wide shrinker description */
  81 static struct shrinker f2fs_shrinker_info = {
  82         .scan_objects = f2fs_shrink_scan,
  83         .count_objects = f2fs_shrink_count,
  84         .seeks = DEFAULT_SEEKS,
  85 };
  86
  87 enum {
  88         Opt_gc_background,
  89         Opt_disable_roll_forward,
  90         Opt_norecovery,
  91         Opt_discard,
  92         Opt_nodiscard,
  93         Opt_noheap,
  94         Opt_heap,
  95         Opt_user_xattr,
  96         Opt_nouser_xattr,
  97         Opt_acl,
  98         Opt_noacl,
  99         Opt_active_logs,
 100         Opt_disable_ext_identify,
 101         Opt_inline_xattr,
 102         Opt_noinline_xattr,
 103         Opt_inline_xattr_size,
 104         Opt_inline_data,
 105         Opt_inline_dentry,
 106         Opt_noinline_dentry,
 107         Opt_flush_merge,
 108         Opt_noflush_merge,
 109         Opt_nobarrier,
 110         Opt_fastboot,
 111         Opt_extent_cache,
 112         Opt_noextent_cache,
 113         Opt_noinline_data,
 114         Opt_data_flush,
 115         Opt_reserve_root,
 116         Opt_resgid,
 117         Opt_resuid,
 118         Opt_mode,
 119         Opt_io_size_bits,
 120         Opt_fault_injection,
 121         Opt_fault_type,
 122         Opt_lazytime,
 123         Opt_nolazytime,
 124         Opt_quota,
 125         Opt_noquota,
 126         Opt_usrquota,
 127         Opt_grpquota,
 128         Opt_prjquota,
 129         Opt_usrjquota,
 130         Opt_grpjquota,
 131         Opt_prjjquota,
 132         Opt_offusrjquota,
 133         Opt_offgrpjquota,
 134         Opt_offprjjquota,
 135         Opt_jqfmt_vfsold,
 136         Opt_jqfmt_vfsv0,
 137         Opt_jqfmt_vfsv1,
 138         Opt_whint,
 139         Opt_alloc,
 140         Opt_fsync,
 141         Opt_test_dummy_encryption,
 142         Opt_inlinecrypt,
 143         Opt_checkpoint_disable,
 144         Opt_checkpoint_disable_cap,
 145         Opt_checkpoint_disable_cap_perc,
 146         Opt_checkpoint_enable,
 147         Opt_checkpoint_merge,
 148         Opt_nocheckpoint_merge,
 149         Opt_compress_algorithm,
 150         Opt_compress_log_size,
 151         Opt_compress_extension,
 152         Opt_nocompress_extension,
 153         Opt_compress_chksum,
 154         Opt_compress_mode,
 155         Opt_compress_cache,
 156         Opt_atgc,
 157         Opt_gc_merge,
 158         Opt_nogc_merge,
 159         Opt_discard_unit,
 160         Opt_err,
 161 };
 162
 163 static match_table_t f2fs_tokens = {
 164         {Opt_gc_background, "background_gc=%s"},
 165         {Opt_disable_roll_forward, "disable_roll_forward"},
 166         {Opt_norecovery, "norecovery"},
 167         {Opt_discard, "discard"},
 168         {Opt_nodiscard, "nodiscard"},
 169         {Opt_noheap, "no_heap"},
 170         {Opt_heap, "heap"},
 171         {Opt_user_xattr, "user_xattr"},
 172         {Opt_nouser_xattr, "nouser_xattr"},
 173         {Opt_acl, "acl"},
 174         {Opt_noacl, "noacl"},
 175         {Opt_active_logs, "active_logs=%u"},
 176         {Opt_disable_ext_identify, "disable_ext_identify"},
 177         {Opt_inline_xattr, "inline_xattr"},
 178         {Opt_noinline_xattr, "noinline_xattr"},
 179         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 180         {Opt_inline_data, "inline_data"},
 181         {Opt_inline_dentry, "inline_dentry"},
 182         {Opt_noinline_dentry, "noinline_dentry"},
 183         {Opt_flush_merge, "flush_merge"},
 184         {Opt_noflush_merge, "noflush_merge"},
 185         {Opt_nobarrier, "nobarrier"},
 186         {Opt_fastboot, "fastboot"},
 187         {Opt_extent_cache, "extent_cache"},
 188         {Opt_noextent_cache, "noextent_cache"},
 189         {Opt_noinline_data, "noinline_data"},
 190         {Opt_data_flush, "data_flush"},
 191         {Opt_reserve_root, "reserve_root=%u"},
 192         {Opt_resgid, "resgid=%u"},
 193         {Opt_resuid, "resuid=%u"},
 194         {Opt_mode, "mode=%s"},
 195         {Opt_io_size_bits, "io_bits=%u"},
 196         {Opt_fault_injection, "fault_injection=%u"},
 197         {Opt_fault_type, "fault_type=%u"},
 198         {Opt_lazytime, "lazytime"},
 199         {Opt_nolazytime, "nolazytime"},
 200         {Opt_quota, "quota"},
 201         {Opt_noquota, "noquota"},
 202         {Opt_usrquota, "usrquota"},
 203         {Opt_grpquota, "grpquota"},
 204         {Opt_prjquota, "prjquota"},
 205         {Opt_usrjquota, "usrjquota=%s"},
 206         {Opt_grpjquota, "grpjquota=%s"},
 207         {Opt_prjjquota, "prjjquota=%s"},
 208         {Opt_offusrjquota, "usrjquota="},
 209         {Opt_offgrpjquota, "grpjquota="},
 210         {Opt_offprjjquota, "prjjquota="},
 211         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 212         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 213         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 214         {Opt_whint, "whint_mode=%s"},
 215         {Opt_alloc, "alloc_mode=%s"},
 216         {Opt_fsync, "fsync_mode=%s"},
 217         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 218         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 219         {Opt_inlinecrypt, "inlinecrypt"},
 220         {Opt_checkpoint_disable, "checkpoint=disable"},
 221         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 222         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 223         {Opt_checkpoint_enable, "checkpoint=enable"},
 224         {Opt_checkpoint_merge, "checkpoint_merge"},
 225         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 226         {Opt_compress_algorithm, "compress_algorithm=%s"},
 227         {Opt_compress_log_size, "compress_log_size=%u"},
 228         {Opt_compress_extension, "compress_extension=%s"},
 229         {Opt_nocompress_extension, "nocompress_extension=%s"},
 230         {Opt_compress_chksum, "compress_chksum"},
 231         {Opt_compress_mode, "compress_mode=%s"},
 232         {Opt_compress_cache, "compress_cache"},
 233         {Opt_atgc, "atgc"},
 234         {Opt_gc_merge, "gc_merge"},
 235         {Opt_nogc_merge, "nogc_merge"},
 236         {Opt_discard_unit, "discard_unit=%s"},
 237         {Opt_err, NULL},
 238 };
 239
 240 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 241 {
 242         struct va_format vaf;
 243         va_list args;
 244         int level;
 245
 246         va_start(args, fmt);
 247
 248         level = printk_get_level(fmt);
 249         vaf.fmt = printk_skip_level(fmt);
 250         vaf.va = &args;
 251         printk("%c%cF2FS-fs (%s): %pV\n",
 252                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 253
 254         va_end(args);
 255 }
 256
 257 #ifdef CONFIG_UNICODE
 258 static const struct f2fs_sb_encodings {
 259         __u16 magic;
 260         char *name;
 261         char *version;
 262 } f2fs_sb_encoding_map[] = {
 263         {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
 264 };
 265
 266 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
 267                                  const struct f2fs_sb_encodings **encoding,
 268                                  __u16 *flags)
 269 {
 270         __u16 magic = le16_to_cpu(sb->s_encoding);
 271         int i;
 272
 273         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 274                 if (magic == f2fs_sb_encoding_map[i].magic)
 275                         break;
 276
 277         if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
 278                 return -EINVAL;
 279
 280         *encoding = &f2fs_sb_encoding_map[i];
 281         *flags = le16_to_cpu(sb->s_encoding_flags);
 282
 283         return 0;
 284 }
 285
 286 struct kmem_cache *f2fs_cf_name_slab;
 287 static int __init f2fs_create_casefold_cache(void)
 288 {
 289         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 290                                                         F2FS_NAME_LEN);
 291         if (!f2fs_cf_name_slab)
 292                 return -ENOMEM;
 293         return 0;
 294 }
 295
 296 static void f2fs_destroy_casefold_cache(void)
 297 {
 298         kmem_cache_destroy(f2fs_cf_name_slab);
 299 }
 300 #else
 301 static int __init f2fs_create_casefold_cache(void) { return 0; }
 302 static void f2fs_destroy_casefold_cache(void) { }
 303 #endif
 304
 305 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 306 {
 307         block_t limit = min((sbi->user_block_count << 1) / 1000,
 308                         sbi->user_block_count - sbi->reserved_blocks);
 309
 310         /* limit is 0.2% */
 311         if (test_opt(sbi, RESERVE_ROOT) &&
 312                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 313                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 314                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 315                           F2FS_OPTION(sbi).root_reserved_blocks);
 316         }
 317         if (!test_opt(sbi, RESERVE_ROOT) &&
 318                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 319                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 320                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 321                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 322                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 323                           from_kuid_munged(&init_user_ns,
 324                                            F2FS_OPTION(sbi).s_resuid),
 325                           from_kgid_munged(&init_user_ns,
 326                                            F2FS_OPTION(sbi).s_resgid));
 327 }
 328
 329 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 330 {
 331         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 332                 return;
 333
 334         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 335                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 336         else
 337                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 338                                         F2FS_OPTION(sbi).unusable_cap_perc;
 339
 340         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 341                         F2FS_OPTION(sbi).unusable_cap,
 342                         F2FS_OPTION(sbi).unusable_cap_perc);
 343 }
 344
 345 static void init_once(void *foo)
 346 {
 347         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 348
 349         inode_init_once(&fi->vfs_inode);
 350 }
 351
 352 #ifdef CONFIG_QUOTA
 353 static const char * const quotatypes[] = INITQFNAMES;
 354 #define QTYPE2NAME(t) (quotatypes[t])
 355 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 356                                                         substring_t *args)
 357 {
 358         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 359         char *qname;
 360         int ret = -EINVAL;
 361
 362         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 363                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 364                 return -EINVAL;
 365         }
 366         if (f2fs_sb_has_quota_ino(sbi)) {
 367                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 368                 return 0;
 369         }
 370
 371         qname = match_strdup(args);
 372         if (!qname) {
 373                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 374                 return -ENOMEM;
 375         }
 376         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 377                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 378                         ret = 0;
 379                 else
 380                         f2fs_err(sbi, "%s quota file already specified",
 381                                  QTYPE2NAME(qtype));
 382                 goto errout;
 383         }
 384         if (strchr(qname, '/')) {
 385                 f2fs_err(sbi, "quotafile must be on filesystem root");
 386                 goto errout;
 387         }
 388         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 389         set_opt(sbi, QUOTA);
 390         return 0;
 391 errout:
 392         kfree(qname);
 393         return ret;
 394 }
 395
 396 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 397 {
 398         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 399
 400         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 401                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 402                 return -EINVAL;
 403         }
 404         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 405         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 406         return 0;
 407 }
 408
 409 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 410 {
 411         /*
 412          * We do the test below only for project quotas. 'usrquota' and
 413          * 'grpquota' mount options are allowed even without quota feature
 414          * to support legacy quotas in quota files.
 415          */
 416         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 417                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 418                 return -1;
 419         }
 420         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 421                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 422                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 423                 if (test_opt(sbi, USRQUOTA) &&
 424                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 425                         clear_opt(sbi, USRQUOTA);
 426
 427                 if (test_opt(sbi, GRPQUOTA) &&
 428                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 429                         clear_opt(sbi, GRPQUOTA);
 430
 431                 if (test_opt(sbi, PRJQUOTA) &&
 432                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 433                         clear_opt(sbi, PRJQUOTA);
 434
 435                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 436                                 test_opt(sbi, PRJQUOTA)) {
 437                         f2fs_err(sbi, "old and new quota format mixing");
 438                         return -1;
 439                 }
 440
 441                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 442                         f2fs_err(sbi, "journaled quota format not specified");
 443                         return -1;
 444                 }
 445         }
 446
 447         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 448                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 449                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 450         }
 451         return 0;
 452 }
 453 #endif
 454
 455 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 456                                           const char *opt,
 457                                           const substring_t *arg,
 458                                           bool is_remount)
 459 {
 460         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 461 #ifdef CONFIG_FS_ENCRYPTION
 462         int err;
 463
 464         if (!f2fs_sb_has_encrypt(sbi)) {
 465                 f2fs_err(sbi, "Encrypt feature is off");
 466                 return -EINVAL;
 467         }
 468
 469         /*
 470          * This mount option is just for testing, and it's not worthwhile to
 471          * implement the extra complexity (e.g. RCU protection) that would be
 472          * needed to allow it to be set or changed during remount.  We do allow
 473          * it to be specified during remount, but only if there is no change.
 474          */
 475         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 476                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 477                 return -EINVAL;
 478         }
 479         err = fscrypt_set_test_dummy_encryption(
 480                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 481         if (err) {
 482                 if (err == -EEXIST)
 483                         f2fs_warn(sbi,
 484                                   "Can't change test_dummy_encryption on remount");
 485                 else if (err == -EINVAL)
 486                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 487                                   opt);
 488                 else
 489                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 490                                   opt, err);
 491                 return -EINVAL;
 492         }
 493         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 494 #else
 495         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 496 #endif
 497         return 0;
 498 }
 499
 500 #ifdef CONFIG_F2FS_FS_COMPRESSION
 501 /*
 502  * 1. The same extension name cannot not appear in both compress and non-compress extension
 503  * at the same time.
 504  * 2. If the compress extension specifies all files, the types specified by the non-compress
 505  * extension will be treated as special cases and will not be compressed.
 506  * 3. Don't allow the non-compress extension specifies all files.
 507  */
 508 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 509 {
 510         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 511         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 512         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 513
 514         ext = F2FS_OPTION(sbi).extensions;
 515         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 516         noext = F2FS_OPTION(sbi).noextensions;
 517         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 518
 519         if (!noext_cnt)
 520                 return 0;
 521
 522         for (no_index = 0; no_index < noext_cnt; no_index++) {
 523                 if (!strcasecmp("*", noext[no_index])) {
 524                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 525                         return -EINVAL;
 526                 }
 527                 for (index = 0; index < ext_cnt; index++) {
 528                         if (!strcasecmp(ext[index], noext[no_index])) {
 529                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 530                                                 ext[index]);
 531                                 return -EINVAL;
 532                         }
 533                 }
 534         }
 535         return 0;
 536 }
 537
 538 #ifdef CONFIG_F2FS_FS_LZ4
 539 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 540 {
 541 #ifdef CONFIG_F2FS_FS_LZ4HC
 542         unsigned int level;
 543 #endif
 544
 545         if (strlen(str) == 3) {
 546                 F2FS_OPTION(sbi).compress_level = 0;
 547                 return 0;
 548         }
 549
 550 #ifdef CONFIG_F2FS_FS_LZ4HC
 551         str += 3;
 552
 553         if (str[0] != ':') {
 554                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 555                 return -EINVAL;
 556         }
 557         if (kstrtouint(str + 1, 10, &level))
 558                 return -EINVAL;
 559
 560         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 561                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 562                 return -EINVAL;
 563         }
 564
 565         F2FS_OPTION(sbi).compress_level = level;
 566         return 0;
 567 #else
 568         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 569         return -EINVAL;
 570 #endif
 571 }
 572 #endif
 573
 574 #ifdef CONFIG_F2FS_FS_ZSTD
 575 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 576 {
 577         unsigned int level;
 578         int len = 4;
 579
 580         if (strlen(str) == len) {
 581                 F2FS_OPTION(sbi).compress_level = 0;
 582                 return 0;
 583         }
 584
 585         str += len;
 586
 587         if (str[0] != ':') {
 588                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 589                 return -EINVAL;
 590         }
 591         if (kstrtouint(str + 1, 10, &level))
 592                 return -EINVAL;
 593
 594         if (!level || level > ZSTD_maxCLevel()) {
 595                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 596                 return -EINVAL;
 597         }
 598
 599         F2FS_OPTION(sbi).compress_level = level;
 600         return 0;
 601 }
 602 #endif
 603 #endif
 604
 605 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 606 {
 607         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 608         substring_t args[MAX_OPT_ARGS];
 609 #ifdef CONFIG_F2FS_FS_COMPRESSION
 610         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 611         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 612         int ext_cnt, noext_cnt;
 613 #endif
 614         char *p, *name;
 615         int arg = 0;
 616         kuid_t uid;
 617         kgid_t gid;
 618         int ret;
 619
 620         if (!options)
 621                 goto default_check;
 622
 623         while ((p = strsep(&options, ",")) != NULL) {
 624                 int token;
 625
 626                 if (!*p)
 627                         continue;
 628                 /*
 629                  * Initialize args struct so we know whether arg was
 630                  * found; some options take optional arguments.
 631                  */
 632                 args[0].to = args[0].from = NULL;
 633                 token = match_token(p, f2fs_tokens, args);
 634
 635                 switch (token) {
 636                 case Opt_gc_background:
 637                         name = match_strdup(&args[0]);
 638
 639                         if (!name)
 640                                 return -ENOMEM;
 641                         if (!strcmp(name, "on")) {
 642                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 643                         } else if (!strcmp(name, "off")) {
 644                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 645                         } else if (!strcmp(name, "sync")) {
 646                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 647                         } else {
 648                                 kfree(name);
 649                                 return -EINVAL;
 650                         }
 651                         kfree(name);
 652                         break;
 653                 case Opt_disable_roll_forward:
 654                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 655                         break;
 656                 case Opt_norecovery:
 657                         /* this option mounts f2fs with ro */
 658                         set_opt(sbi, NORECOVERY);
 659                         if (!f2fs_readonly(sb))
 660                                 return -EINVAL;
 661                         break;
 662                 case Opt_discard:
 663                         set_opt(sbi, DISCARD);
 664                         break;
 665                 case Opt_nodiscard:
 666                         if (f2fs_sb_has_blkzoned(sbi)) {
 667                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 668                                 return -EINVAL;
 669                         }
 670                         clear_opt(sbi, DISCARD);
 671                         break;
 672                 case Opt_noheap:
 673                         set_opt(sbi, NOHEAP);
 674                         break;
 675                 case Opt_heap:
 676                         clear_opt(sbi, NOHEAP);
 677                         break;
 678 #ifdef CONFIG_F2FS_FS_XATTR
 679                 case Opt_user_xattr:
 680                         set_opt(sbi, XATTR_USER);
 681                         break;
 682                 case Opt_nouser_xattr:
 683                         clear_opt(sbi, XATTR_USER);
 684                         break;
 685                 case Opt_inline_xattr:
 686                         set_opt(sbi, INLINE_XATTR);
 687                         break;
 688                 case Opt_noinline_xattr:
 689                         clear_opt(sbi, INLINE_XATTR);
 690                         break;
 691                 case Opt_inline_xattr_size:
 692                         if (args->from && match_int(args, &arg))
 693                                 return -EINVAL;
 694                         set_opt(sbi, INLINE_XATTR_SIZE);
 695                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 696                         break;
 697 #else
 698                 case Opt_user_xattr:
 699                         f2fs_info(sbi, "user_xattr options not supported");
 700                         break;
 701                 case Opt_nouser_xattr:
 702                         f2fs_info(sbi, "nouser_xattr options not supported");
 703                         break;
 704                 case Opt_inline_xattr:
 705                         f2fs_info(sbi, "inline_xattr options not supported");
 706                         break;
 707                 case Opt_noinline_xattr:
 708                         f2fs_info(sbi, "noinline_xattr options not supported");
 709                         break;
 710 #endif
 711 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 712                 case Opt_acl:
 713                         set_opt(sbi, POSIX_ACL);
 714                         break;
 715                 case Opt_noacl:
 716                         clear_opt(sbi, POSIX_ACL);
 717                         break;
 718 #else
 719                 case Opt_acl:
 720                         f2fs_info(sbi, "acl options not supported");
 721                         break;
 722                 case Opt_noacl:
 723                         f2fs_info(sbi, "noacl options not supported");
 724                         break;
 725 #endif
 726                 case Opt_active_logs:
 727                         if (args->from && match_int(args, &arg))
 728                                 return -EINVAL;
 729                         if (arg != 2 && arg != 4 &&
 730                                 arg != NR_CURSEG_PERSIST_TYPE)
 731                                 return -EINVAL;
 732                         F2FS_OPTION(sbi).active_logs = arg;
 733                         break;
 734                 case Opt_disable_ext_identify:
 735                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 736                         break;
 737                 case Opt_inline_data:
 738                         set_opt(sbi, INLINE_DATA);
 739                         break;
 740                 case Opt_inline_dentry:
 741                         set_opt(sbi, INLINE_DENTRY);
 742                         break;
 743                 case Opt_noinline_dentry:
 744                         clear_opt(sbi, INLINE_DENTRY);
 745                         break;
 746                 case Opt_flush_merge:
 747                         set_opt(sbi, FLUSH_MERGE);
 748                         break;
 749                 case Opt_noflush_merge:
 750                         clear_opt(sbi, FLUSH_MERGE);
 751                         break;
 752                 case Opt_nobarrier:
 753                         set_opt(sbi, NOBARRIER);
 754                         break;
 755                 case Opt_fastboot:
 756                         set_opt(sbi, FASTBOOT);
 757                         break;
 758                 case Opt_extent_cache:
 759                         set_opt(sbi, EXTENT_CACHE);
 760                         break;
 761                 case Opt_noextent_cache:
 762                         clear_opt(sbi, EXTENT_CACHE);
 763                         break;
 764                 case Opt_noinline_data:
 765                         clear_opt(sbi, INLINE_DATA);
 766                         break;
 767                 case Opt_data_flush:
 768                         set_opt(sbi, DATA_FLUSH);
 769                         break;
 770                 case Opt_reserve_root:
 771                         if (args->from && match_int(args, &arg))
 772                                 return -EINVAL;
 773                         if (test_opt(sbi, RESERVE_ROOT)) {
 774                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 775                                           F2FS_OPTION(sbi).root_reserved_blocks);
 776                         } else {
 777                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 778                                 set_opt(sbi, RESERVE_ROOT);
 779                         }
 780                         break;
 781                 case Opt_resuid:
 782                         if (args->from && match_int(args, &arg))
 783                                 return -EINVAL;
 784                         uid = make_kuid(current_user_ns(), arg);
 785                         if (!uid_valid(uid)) {
 786                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 787                                 return -EINVAL;
 788                         }
 789                         F2FS_OPTION(sbi).s_resuid = uid;
 790                         break;
 791                 case Opt_resgid:
 792                         if (args->from && match_int(args, &arg))
 793                                 return -EINVAL;
 794                         gid = make_kgid(current_user_ns(), arg);
 795                         if (!gid_valid(gid)) {
 796                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 797                                 return -EINVAL;
 798                         }
 799                         F2FS_OPTION(sbi).s_resgid = gid;
 800                         break;
 801                 case Opt_mode:
 802                         name = match_strdup(&args[0]);
 803
 804                         if (!name)
 805                                 return -ENOMEM;
 806                         if (!strcmp(name, "adaptive")) {
 807                                 if (f2fs_sb_has_blkzoned(sbi)) {
 808                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 809                                         kfree(name);
 810                                         return -EINVAL;
 811                                 }
 812                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 813                         } else if (!strcmp(name, "lfs")) {
 814                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 815                         } else {
 816                                 kfree(name);
 817                                 return -EINVAL;
 818                         }
 819                         kfree(name);
 820                         break;
 821                 case Opt_io_size_bits:
 822                         if (args->from && match_int(args, &arg))
 823                                 return -EINVAL;
 824                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 825                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 826                                           1 << arg, BIO_MAX_VECS);
 827                                 return -EINVAL;
 828                         }
 829                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 830                         break;
 831 #ifdef CONFIG_F2FS_FAULT_INJECTION
 832                 case Opt_fault_injection:
 833                         if (args->from && match_int(args, &arg))
 834                                 return -EINVAL;
 835                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 836                         set_opt(sbi, FAULT_INJECTION);
 837                         break;
 838
 839                 case Opt_fault_type:
 840                         if (args->from && match_int(args, &arg))
 841                                 return -EINVAL;
 842                         f2fs_build_fault_attr(sbi, 0, arg);
 843                         set_opt(sbi, FAULT_INJECTION);
 844                         break;
 845 #else
 846                 case Opt_fault_injection:
 847                         f2fs_info(sbi, "fault_injection options not supported");
 848                         break;
 849
 850                 case Opt_fault_type:
 851                         f2fs_info(sbi, "fault_type options not supported");
 852                         break;
 853 #endif
 854                 case Opt_lazytime:
 855                         sb->s_flags |= SB_LAZYTIME;
 856                         break;
 857                 case Opt_nolazytime:
 858                         sb->s_flags &= ~SB_LAZYTIME;
 859                         break;
 860 #ifdef CONFIG_QUOTA
 861                 case Opt_quota:
 862                 case Opt_usrquota:
 863                         set_opt(sbi, USRQUOTA);
 864                         break;
 865                 case Opt_grpquota:
 866                         set_opt(sbi, GRPQUOTA);
 867                         break;
 868                 case Opt_prjquota:
 869                         set_opt(sbi, PRJQUOTA);
 870                         break;
 871                 case Opt_usrjquota:
 872                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 873                         if (ret)
 874                                 return ret;
 875                         break;
 876                 case Opt_grpjquota:
 877                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 878                         if (ret)
 879                                 return ret;
 880                         break;
 881                 case Opt_prjjquota:
 882                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 883                         if (ret)
 884                                 return ret;
 885                         break;
 886                 case Opt_offusrjquota:
 887                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 888                         if (ret)
 889                                 return ret;
 890                         break;
 891                 case Opt_offgrpjquota:
 892                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 893                         if (ret)
 894                                 return ret;
 895                         break;
 896                 case Opt_offprjjquota:
 897                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 898                         if (ret)
 899                                 return ret;
 900                         break;
 901                 case Opt_jqfmt_vfsold:
 902                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 903                         break;
 904                 case Opt_jqfmt_vfsv0:
 905                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 906                         break;
 907                 case Opt_jqfmt_vfsv1:
 908                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 909                         break;
 910                 case Opt_noquota:
 911                         clear_opt(sbi, QUOTA);
 912                         clear_opt(sbi, USRQUOTA);
 913                         clear_opt(sbi, GRPQUOTA);
 914                         clear_opt(sbi, PRJQUOTA);
 915                         break;
 916 #else
 917                 case Opt_quota:
 918                 case Opt_usrquota:
 919                 case Opt_grpquota:
 920                 case Opt_prjquota:
 921                 case Opt_usrjquota:
 922                 case Opt_grpjquota:
 923                 case Opt_prjjquota:
 924                 case Opt_offusrjquota:
 925                 case Opt_offgrpjquota:
 926                 case Opt_offprjjquota:
 927                 case Opt_jqfmt_vfsold:
 928                 case Opt_jqfmt_vfsv0:
 929                 case Opt_jqfmt_vfsv1:
 930                 case Opt_noquota:
 931                         f2fs_info(sbi, "quota operations not supported");
 932                         break;
 933 #endif
 934                 case Opt_whint:
 935                         name = match_strdup(&args[0]);
 936                         if (!name)
 937                                 return -ENOMEM;
 938                         if (!strcmp(name, "user-based")) {
 939                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 940                         } else if (!strcmp(name, "off")) {
 941                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 942                         } else if (!strcmp(name, "fs-based")) {
 943                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 944                         } else {
 945                                 kfree(name);
 946                                 return -EINVAL;
 947                         }
 948                         kfree(name);
 949                         break;
 950                 case Opt_alloc:
 951                         name = match_strdup(&args[0]);
 952                         if (!name)
 953                                 return -ENOMEM;
 954
 955                         if (!strcmp(name, "default")) {
 956                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 957                         } else if (!strcmp(name, "reuse")) {
 958                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 959                         } else {
 960                                 kfree(name);
 961                                 return -EINVAL;
 962                         }
 963                         kfree(name);
 964                         break;
 965                 case Opt_fsync:
 966                         name = match_strdup(&args[0]);
 967                         if (!name)
 968                                 return -ENOMEM;
 969                         if (!strcmp(name, "posix")) {
 970                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 971                         } else if (!strcmp(name, "strict")) {
 972                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 973                         } else if (!strcmp(name, "nobarrier")) {
 974                                 F2FS_OPTION(sbi).fsync_mode =
 975                                                         FSYNC_MODE_NOBARRIER;
 976                         } else {
 977                                 kfree(name);
 978                                 return -EINVAL;
 979                         }
 980                         kfree(name);
 981                         break;
 982                 case Opt_test_dummy_encryption:
 983                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 984                                                              is_remount);
 985                         if (ret)
 986                                 return ret;
 987                         break;
 988                 case Opt_inlinecrypt:
 989 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
 990                         sb->s_flags |= SB_INLINECRYPT;
 991 #else
 992                         f2fs_info(sbi, "inline encryption not supported");
 993 #endif
 994                         break;
 995                 case Opt_checkpoint_disable_cap_perc:
 996                         if (args->from && match_int(args, &arg))
 997                                 return -EINVAL;
 998                         if (arg < 0 || arg > 100)
 999                                 return -EINVAL;
1000                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1001                         set_opt(sbi, DISABLE_CHECKPOINT);
1002                         break;
1003                 case Opt_checkpoint_disable_cap:
1004                         if (args->from && match_int(args, &arg))
1005                                 return -EINVAL;
1006                         F2FS_OPTION(sbi).unusable_cap = arg;
1007                         set_opt(sbi, DISABLE_CHECKPOINT);
1008                         break;
1009                 case Opt_checkpoint_disable:
1010                         set_opt(sbi, DISABLE_CHECKPOINT);
1011                         break;
1012                 case Opt_checkpoint_enable:
1013                         clear_opt(sbi, DISABLE_CHECKPOINT);
1014                         break;
1015                 case Opt_checkpoint_merge:
1016                         set_opt(sbi, MERGE_CHECKPOINT);
1017                         break;
1018                 case Opt_nocheckpoint_merge:
1019                         clear_opt(sbi, MERGE_CHECKPOINT);
1020                         break;
1021 #ifdef CONFIG_F2FS_FS_COMPRESSION
1022                 case Opt_compress_algorithm:
1023                         if (!f2fs_sb_has_compression(sbi)) {
1024                                 f2fs_info(sbi, "Image doesn't support compression");
1025                                 break;
1026                         }
1027                         name = match_strdup(&args[0]);
1028                         if (!name)
1029                                 return -ENOMEM;
1030                         if (!strcmp(name, "lzo")) {
1031 #ifdef CONFIG_F2FS_FS_LZO
1032                                 F2FS_OPTION(sbi).compress_level = 0;
1033                                 F2FS_OPTION(sbi).compress_algorithm =
1034                                                                 COMPRESS_LZO;
1035 #else
1036                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1037 #endif
1038                         } else if (!strncmp(name, "lz4", 3)) {
1039 #ifdef CONFIG_F2FS_FS_LZ4
1040                                 ret = f2fs_set_lz4hc_level(sbi, name);
1041                                 if (ret) {
1042                                         kfree(name);
1043                                         return -EINVAL;
1044                                 }
1045                                 F2FS_OPTION(sbi).compress_algorithm =
1046                                                                 COMPRESS_LZ4;
1047 #else
1048                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1049 #endif
1050                         } else if (!strncmp(name, "zstd", 4)) {
1051 #ifdef CONFIG_F2FS_FS_ZSTD
1052                                 ret = f2fs_set_zstd_level(sbi, name);
1053                                 if (ret) {
1054                                         kfree(name);
1055                                         return -EINVAL;
1056                                 }
1057                                 F2FS_OPTION(sbi).compress_algorithm =
1058                                                                 COMPRESS_ZSTD;
1059 #else
1060                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1061 #endif
1062                         } else if (!strcmp(name, "lzo-rle")) {
1063 #ifdef CONFIG_F2FS_FS_LZORLE
1064                                 F2FS_OPTION(sbi).compress_level = 0;
1065                                 F2FS_OPTION(sbi).compress_algorithm =
1066                                                                 COMPRESS_LZORLE;
1067 #else
1068                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1069 #endif
1070                         } else {
1071                                 kfree(name);
1072                                 return -EINVAL;
1073                         }
1074                         kfree(name);
1075                         break;
1076                 case Opt_compress_log_size:
1077                         if (!f2fs_sb_has_compression(sbi)) {
1078                                 f2fs_info(sbi, "Image doesn't support compression");
1079                                 break;
1080                         }
1081                         if (args->from && match_int(args, &arg))
1082                                 return -EINVAL;
1083                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1084                                 arg > MAX_COMPRESS_LOG_SIZE) {
1085                                 f2fs_err(sbi,
1086                                         "Compress cluster log size is out of range");
1087                                 return -EINVAL;
1088                         }
1089                         F2FS_OPTION(sbi).compress_log_size = arg;
1090                         break;
1091                 case Opt_compress_extension:
1092                         if (!f2fs_sb_has_compression(sbi)) {
1093                                 f2fs_info(sbi, "Image doesn't support compression");
1094                                 break;
1095                         }
1096                         name = match_strdup(&args[0]);
1097                         if (!name)
1098                                 return -ENOMEM;
1099
1100                         ext = F2FS_OPTION(sbi).extensions;
1101                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1102
1103                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1104                                 ext_cnt >= COMPRESS_EXT_NUM) {
1105                                 f2fs_err(sbi,
1106                                         "invalid extension length/number");
1107                                 kfree(name);
1108                                 return -EINVAL;
1109                         }
1110
1111                         strcpy(ext[ext_cnt], name);
1112                         F2FS_OPTION(sbi).compress_ext_cnt++;
1113                         kfree(name);
1114                         break;
1115                 case Opt_nocompress_extension:
1116                         if (!f2fs_sb_has_compression(sbi)) {
1117                                 f2fs_info(sbi, "Image doesn't support compression");
1118                                 break;
1119                         }
1120                         name = match_strdup(&args[0]);
1121                         if (!name)
1122                                 return -ENOMEM;
1123
1124                         noext = F2FS_OPTION(sbi).noextensions;
1125                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1126
1127                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1128                                 noext_cnt >= COMPRESS_EXT_NUM) {
1129                                 f2fs_err(sbi,
1130                                         "invalid extension length/number");
1131                                 kfree(name);
1132                                 return -EINVAL;
1133                         }
1134
1135                         strcpy(noext[noext_cnt], name);
1136                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1137                         kfree(name);
1138                         break;
1139                 case Opt_compress_chksum:
1140                         F2FS_OPTION(sbi).compress_chksum = true;
1141                         break;
1142                 case Opt_compress_mode:
1143                         name = match_strdup(&args[0]);
1144                         if (!name)
1145                                 return -ENOMEM;
1146                         if (!strcmp(name, "fs")) {
1147                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1148                         } else if (!strcmp(name, "user")) {
1149                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1150                         } else {
1151                                 kfree(name);
1152                                 return -EINVAL;
1153                         }
1154                         kfree(name);
1155                         break;
1156                 case Opt_compress_cache:
1157                         set_opt(sbi, COMPRESS_CACHE);
1158                         break;
1159 #else
1160                 case Opt_compress_algorithm:
1161                 case Opt_compress_log_size:
1162                 case Opt_compress_extension:
1163                 case Opt_nocompress_extension:
1164                 case Opt_compress_chksum:
1165                 case Opt_compress_mode:
1166                 case Opt_compress_cache:
1167                         f2fs_info(sbi, "compression options not supported");
1168                         break;
1169 #endif
1170                 case Opt_atgc:
1171                         set_opt(sbi, ATGC);
1172                         break;
1173                 case Opt_gc_merge:
1174                         set_opt(sbi, GC_MERGE);
1175                         break;
1176                 case Opt_nogc_merge:
1177                         clear_opt(sbi, GC_MERGE);
1178                         break;
1179                 case Opt_discard_unit:
1180                         name = match_strdup(&args[0]);
1181                         if (!name)
1182                                 return -ENOMEM;
1183                         if (!strcmp(name, "block")) {
1184                                 F2FS_OPTION(sbi).discard_unit =
1185                                                 DISCARD_UNIT_BLOCK;
1186                         } else if (!strcmp(name, "segment")) {
1187                                 F2FS_OPTION(sbi).discard_unit =
1188                                                 DISCARD_UNIT_SEGMENT;
1189                         } else if (!strcmp(name, "section")) {
1190                                 F2FS_OPTION(sbi).discard_unit =
1191                                                 DISCARD_UNIT_SECTION;
1192                         } else {
1193                                 kfree(name);
1194                                 return -EINVAL;
1195                         }
1196                         kfree(name);
1197                         break;
1198                 default:
1199                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1200                                  p);
1201                         return -EINVAL;
1202                 }
1203         }
1204 default_check:
1205 #ifdef CONFIG_QUOTA
1206         if (f2fs_check_quota_options(sbi))
1207                 return -EINVAL;
1208 #else
1209         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1210                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1211                 return -EINVAL;
1212         }
1213         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1214                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1215                 return -EINVAL;
1216         }
1217 #endif
1218 #ifndef CONFIG_UNICODE
1219         if (f2fs_sb_has_casefold(sbi)) {
1220                 f2fs_err(sbi,
1221                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1222                 return -EINVAL;
1223         }
1224 #endif
1225         /*
1226          * The BLKZONED feature indicates that the drive was formatted with
1227          * zone alignment optimization. This is optional for host-aware
1228          * devices, but mandatory for host-managed zoned block devices.
1229          */
1230 #ifndef CONFIG_BLK_DEV_ZONED
1231         if (f2fs_sb_has_blkzoned(sbi)) {
1232                 f2fs_err(sbi, "Zoned block device support is not enabled");
1233                 return -EINVAL;
1234         }
1235 #endif
1236         if (f2fs_sb_has_blkzoned(sbi)) {
1237                 if (F2FS_OPTION(sbi).discard_unit !=
1238                                                 DISCARD_UNIT_SECTION) {
1239                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1240                         F2FS_OPTION(sbi).discard_unit =
1241                                         DISCARD_UNIT_SECTION;
1242                 }
1243         }
1244
1245 #ifdef CONFIG_F2FS_FS_COMPRESSION
1246         if (f2fs_test_compress_extension(sbi)) {
1247                 f2fs_err(sbi, "invalid compress or nocompress extension");
1248                 return -EINVAL;
1249         }
1250 #endif
1251
1252         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1253                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1254                          F2FS_IO_SIZE_KB(sbi));
1255                 return -EINVAL;
1256         }
1257
1258         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1259                 int min_size, max_size;
1260
1261                 if (!f2fs_sb_has_extra_attr(sbi) ||
1262                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1263                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1264                         return -EINVAL;
1265                 }
1266                 if (!test_opt(sbi, INLINE_XATTR)) {
1267                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1268                         return -EINVAL;
1269                 }
1270
1271                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1272                 max_size = MAX_INLINE_XATTR_SIZE;
1273
1274                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1275                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1276                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1277                                  min_size, max_size);
1278                         return -EINVAL;
1279                 }
1280         }
1281
1282         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1283                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1284                 return -EINVAL;
1285         }
1286
1287         /* Not pass down write hints if the number of active logs is lesser
1288          * than NR_CURSEG_PERSIST_TYPE.
1289          */
1290         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
1291                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1292
1293         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1294                 f2fs_err(sbi, "Allow to mount readonly mode only");
1295                 return -EROFS;
1296         }
1297         return 0;
1298 }
1299
1300 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1301 {
1302         struct f2fs_inode_info *fi;
1303
1304         fi = f2fs_kmem_cache_alloc(f2fs_inode_cachep,
1305                                 GFP_F2FS_ZERO, false, F2FS_SB(sb));
1306         if (!fi)
1307                 return NULL;
1308
1309         init_once((void *) fi);
1310
1311         /* Initialize f2fs-specific inode info */
1312         atomic_set(&fi->dirty_pages, 0);
1313         atomic_set(&fi->i_compr_blocks, 0);
1314         init_rwsem(&fi->i_sem);
1315         spin_lock_init(&fi->i_size_lock);
1316         INIT_LIST_HEAD(&fi->dirty_list);
1317         INIT_LIST_HEAD(&fi->gdirty_list);
1318         INIT_LIST_HEAD(&fi->inmem_ilist);
1319         INIT_LIST_HEAD(&fi->inmem_pages);
1320         mutex_init(&fi->inmem_lock);
1321         init_rwsem(&fi->i_gc_rwsem[READ]);
1322         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1323         init_rwsem(&fi->i_mmap_sem);
1324         init_rwsem(&fi->i_xattr_sem);
1325
1326         /* Will be used by directory only */
1327         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1328
1329         return &fi->vfs_inode;
1330 }
1331
1332 static int f2fs_drop_inode(struct inode *inode)
1333 {
1334         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1335         int ret;
1336
1337         /*
1338          * during filesystem shutdown, if checkpoint is disabled,
1339          * drop useless meta/node dirty pages.
1340          */
1341         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1342                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1343                         inode->i_ino == F2FS_META_INO(sbi)) {
1344                         trace_f2fs_drop_inode(inode, 1);
1345                         return 1;
1346                 }
1347         }
1348
1349         /*
1350          * This is to avoid a deadlock condition like below.
1351          * writeback_single_inode(inode)
1352          *  - f2fs_write_data_page
1353          *    - f2fs_gc -> iput -> evict
1354          *       - inode_wait_for_writeback(inode)
1355          */
1356         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1357                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1358                         /* to avoid evict_inode call simultaneously */
1359                         atomic_inc(&inode->i_count);
1360                         spin_unlock(&inode->i_lock);
1361
1362                         /* some remained atomic pages should discarded */
1363                         if (f2fs_is_atomic_file(inode))
1364                                 f2fs_drop_inmem_pages(inode);
1365
1366                         /* should remain fi->extent_tree for writepage */
1367                         f2fs_destroy_extent_node(inode);
1368
1369                         sb_start_intwrite(inode->i_sb);
1370                         f2fs_i_size_write(inode, 0);
1371
1372                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1373                                         inode, NULL, 0, DATA);
1374                         truncate_inode_pages_final(inode->i_mapping);
1375
1376                         if (F2FS_HAS_BLOCKS(inode))
1377                                 f2fs_truncate(inode);
1378
1379                         sb_end_intwrite(inode->i_sb);
1380
1381                         spin_lock(&inode->i_lock);
1382                         atomic_dec(&inode->i_count);
1383                 }
1384                 trace_f2fs_drop_inode(inode, 0);
1385                 return 0;
1386         }
1387         ret = generic_drop_inode(inode);
1388         if (!ret)
1389                 ret = fscrypt_drop_inode(inode);
1390         trace_f2fs_drop_inode(inode, ret);
1391         return ret;
1392 }
1393
1394 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1395 {
1396         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1397         int ret = 0;
1398
1399         spin_lock(&sbi->inode_lock[DIRTY_META]);
1400         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1401                 ret = 1;
1402         } else {
1403                 set_inode_flag(inode, FI_DIRTY_INODE);
1404                 stat_inc_dirty_inode(sbi, DIRTY_META);
1405         }
1406         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1407                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1408                                 &sbi->inode_list[DIRTY_META]);
1409                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1410         }
1411         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1412         return ret;
1413 }
1414
1415 void f2fs_inode_synced(struct inode *inode)
1416 {
1417         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1418
1419         spin_lock(&sbi->inode_lock[DIRTY_META]);
1420         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1421                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1422                 return;
1423         }
1424         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1425                 list_del_init(&F2FS_I(inode)->gdirty_list);
1426                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1427         }
1428         clear_inode_flag(inode, FI_DIRTY_INODE);
1429         clear_inode_flag(inode, FI_AUTO_RECOVER);
1430         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1431         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1432 }
1433
1434 /*
1435  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1436  *
1437  * We should call set_dirty_inode to write the dirty inode through write_inode.
1438  */
1439 static void f2fs_dirty_inode(struct inode *inode, int flags)
1440 {
1441         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1442
1443         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1444                         inode->i_ino == F2FS_META_INO(sbi))
1445                 return;
1446
1447         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1448                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1449
1450         f2fs_inode_dirtied(inode, false);
1451 }
1452
1453 static void f2fs_free_inode(struct inode *inode)
1454 {
1455         fscrypt_free_inode(inode);
1456         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1457 }
1458
1459 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1460 {
1461         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1462         percpu_counter_destroy(&sbi->total_valid_inode_count);
1463 }
1464
1465 static void destroy_device_list(struct f2fs_sb_info *sbi)
1466 {
1467         int i;
1468
1469         for (i = 0; i < sbi->s_ndevs; i++) {
1470                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1471 #ifdef CONFIG_BLK_DEV_ZONED
1472                 kvfree(FDEV(i).blkz_seq);
1473                 kfree(FDEV(i).zone_capacity_blocks);
1474 #endif
1475         }
1476         kvfree(sbi->devs);
1477 }
1478
1479 static void f2fs_put_super(struct super_block *sb)
1480 {
1481         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1482         int i;
1483         bool dropped;
1484
1485         /* unregister procfs/sysfs entries in advance to avoid race case */
1486         f2fs_unregister_sysfs(sbi);
1487
1488         f2fs_quota_off_umount(sb);
1489
1490         /* prevent remaining shrinker jobs */
1491         mutex_lock(&sbi->umount_mutex);
1492
1493         /*
1494          * flush all issued checkpoints and stop checkpoint issue thread.
1495          * after then, all checkpoints should be done by each process context.
1496          */
1497         f2fs_stop_ckpt_thread(sbi);
1498
1499         /*
1500          * We don't need to do checkpoint when superblock is clean.
1501          * But, the previous checkpoint was not done by umount, it needs to do
1502          * clean checkpoint again.
1503          */
1504         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1505                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1506                 struct cp_control cpc = {
1507                         .reason = CP_UMOUNT,
1508                 };
1509                 f2fs_write_checkpoint(sbi, &cpc);
1510         }
1511
1512         /* be sure to wait for any on-going discard commands */
1513         dropped = f2fs_issue_discard_timeout(sbi);
1514
1515         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1516                                         !sbi->discard_blks && !dropped) {
1517                 struct cp_control cpc = {
1518                         .reason = CP_UMOUNT | CP_TRIMMED,
1519                 };
1520                 f2fs_write_checkpoint(sbi, &cpc);
1521         }
1522
1523         /*
1524          * normally superblock is clean, so we need to release this.
1525          * In addition, EIO will skip do checkpoint, we need this as well.
1526          */
1527         f2fs_release_ino_entry(sbi, true);
1528
1529         f2fs_leave_shrinker(sbi);
1530         mutex_unlock(&sbi->umount_mutex);
1531
1532         /* our cp_error case, we can wait for any writeback page */
1533         f2fs_flush_merged_writes(sbi);
1534
1535         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1536
1537         f2fs_bug_on(sbi, sbi->fsync_node_num);
1538
1539         f2fs_destroy_compress_inode(sbi);
1540
1541         iput(sbi->node_inode);
1542         sbi->node_inode = NULL;
1543
1544         iput(sbi->meta_inode);
1545         sbi->meta_inode = NULL;
1546
1547         /*
1548          * iput() can update stat information, if f2fs_write_checkpoint()
1549          * above failed with error.
1550          */
1551         f2fs_destroy_stats(sbi);
1552
1553         /* destroy f2fs internal modules */
1554         f2fs_destroy_node_manager(sbi);
1555         f2fs_destroy_segment_manager(sbi);
1556
1557         f2fs_destroy_post_read_wq(sbi);
1558
1559         kvfree(sbi->ckpt);
1560
1561         sb->s_fs_info = NULL;
1562         if (sbi->s_chksum_driver)
1563                 crypto_free_shash(sbi->s_chksum_driver);
1564         kfree(sbi->raw_super);
1565
1566         destroy_device_list(sbi);
1567         f2fs_destroy_page_array_cache(sbi);
1568         f2fs_destroy_xattr_caches(sbi);
1569         mempool_destroy(sbi->write_io_dummy);
1570 #ifdef CONFIG_QUOTA
1571         for (i = 0; i < MAXQUOTAS; i++)
1572                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1573 #endif
1574         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1575         destroy_percpu_info(sbi);
1576         for (i = 0; i < NR_PAGE_TYPE; i++)
1577                 kvfree(sbi->write_io[i]);
1578 #ifdef CONFIG_UNICODE
1579         utf8_unload(sb->s_encoding);
1580 #endif
1581         kfree(sbi);
1582 }
1583
1584 int f2fs_sync_fs(struct super_block *sb, int sync)
1585 {
1586         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1587         int err = 0;
1588
1589         if (unlikely(f2fs_cp_error(sbi)))
1590                 return 0;
1591         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1592                 return 0;
1593
1594         trace_f2fs_sync_fs(sb, sync);
1595
1596         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1597                 return -EAGAIN;
1598
1599         if (sync)
1600                 err = f2fs_issue_checkpoint(sbi);
1601
1602         return err;
1603 }
1604
1605 static int f2fs_freeze(struct super_block *sb)
1606 {
1607         if (f2fs_readonly(sb))
1608                 return 0;
1609
1610         /* IO error happened before */
1611         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1612                 return -EIO;
1613
1614         /* must be clean, since sync_filesystem() was already called */
1615         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1616                 return -EINVAL;
1617
1618         /* ensure no checkpoint required */
1619         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1620                 return -EINVAL;
1621         return 0;
1622 }
1623
1624 static int f2fs_unfreeze(struct super_block *sb)
1625 {
1626         return 0;
1627 }
1628
1629 #ifdef CONFIG_QUOTA
1630 static int f2fs_statfs_project(struct super_block *sb,
1631                                 kprojid_t projid, struct kstatfs *buf)
1632 {
1633         struct kqid qid;
1634         struct dquot *dquot;
1635         u64 limit;
1636         u64 curblock;
1637
1638         qid = make_kqid_projid(projid);
1639         dquot = dqget(sb, qid);
1640         if (IS_ERR(dquot))
1641                 return PTR_ERR(dquot);
1642         spin_lock(&dquot->dq_dqb_lock);
1643
1644         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1645                                         dquot->dq_dqb.dqb_bhardlimit);
1646         if (limit)
1647                 limit >>= sb->s_blocksize_bits;
1648
1649         if (limit && buf->f_blocks > limit) {
1650                 curblock = (dquot->dq_dqb.dqb_curspace +
1651                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1652                 buf->f_blocks = limit;
1653                 buf->f_bfree = buf->f_bavail =
1654                         (buf->f_blocks > curblock) ?
1655                          (buf->f_blocks - curblock) : 0;
1656         }
1657
1658         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1659                                         dquot->dq_dqb.dqb_ihardlimit);
1660
1661         if (limit && buf->f_files > limit) {
1662                 buf->f_files = limit;
1663                 buf->f_ffree =
1664                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1665                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1666         }
1667
1668         spin_unlock(&dquot->dq_dqb_lock);
1669         dqput(dquot);
1670         return 0;
1671 }
1672 #endif
1673
1674 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1675 {
1676         struct super_block *sb = dentry->d_sb;
1677         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1678         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1679         block_t total_count, user_block_count, start_count;
1680         u64 avail_node_count;
1681
1682         total_count = le64_to_cpu(sbi->raw_super->block_count);
1683         user_block_count = sbi->user_block_count;
1684         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1685         buf->f_type = F2FS_SUPER_MAGIC;
1686         buf->f_bsize = sbi->blocksize;
1687
1688         buf->f_blocks = total_count - start_count;
1689         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1690                                                 sbi->current_reserved_blocks;
1691
1692         spin_lock(&sbi->stat_lock);
1693         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1694                 buf->f_bfree = 0;
1695         else
1696                 buf->f_bfree -= sbi->unusable_block_count;
1697         spin_unlock(&sbi->stat_lock);
1698
1699         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1700                 buf->f_bavail = buf->f_bfree -
1701                                 F2FS_OPTION(sbi).root_reserved_blocks;
1702         else
1703                 buf->f_bavail = 0;
1704
1705         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1706
1707         if (avail_node_count > user_block_count) {
1708                 buf->f_files = user_block_count;
1709                 buf->f_ffree = buf->f_bavail;
1710         } else {
1711                 buf->f_files = avail_node_count;
1712                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1713                                         buf->f_bavail);
1714         }
1715
1716         buf->f_namelen = F2FS_NAME_LEN;
1717         buf->f_fsid    = u64_to_fsid(id);
1718
1719 #ifdef CONFIG_QUOTA
1720         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1721                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1722                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1723         }
1724 #endif
1725         return 0;
1726 }
1727
1728 static inline void f2fs_show_quota_options(struct seq_file *seq,
1729                                            struct super_block *sb)
1730 {
1731 #ifdef CONFIG_QUOTA
1732         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1733
1734         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1735                 char *fmtname = "";
1736
1737                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1738                 case QFMT_VFS_OLD:
1739                         fmtname = "vfsold";
1740                         break;
1741                 case QFMT_VFS_V0:
1742                         fmtname = "vfsv0";
1743                         break;
1744                 case QFMT_VFS_V1:
1745                         fmtname = "vfsv1";
1746                         break;
1747                 }
1748                 seq_printf(seq, ",jqfmt=%s", fmtname);
1749         }
1750
1751         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1752                 seq_show_option(seq, "usrjquota",
1753                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1754
1755         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1756                 seq_show_option(seq, "grpjquota",
1757                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1758
1759         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1760                 seq_show_option(seq, "prjjquota",
1761                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1762 #endif
1763 }
1764
1765 #ifdef CONFIG_F2FS_FS_COMPRESSION
1766 static inline void f2fs_show_compress_options(struct seq_file *seq,
1767                                                         struct super_block *sb)
1768 {
1769         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1770         char *algtype = "";
1771         int i;
1772
1773         if (!f2fs_sb_has_compression(sbi))
1774                 return;
1775
1776         switch (F2FS_OPTION(sbi).compress_algorithm) {
1777         case COMPRESS_LZO:
1778                 algtype = "lzo";
1779                 break;
1780         case COMPRESS_LZ4:
1781                 algtype = "lz4";
1782                 break;
1783         case COMPRESS_ZSTD:
1784                 algtype = "zstd";
1785                 break;
1786         case COMPRESS_LZORLE:
1787                 algtype = "lzo-rle";
1788                 break;
1789         }
1790         seq_printf(seq, ",compress_algorithm=%s", algtype);
1791
1792         if (F2FS_OPTION(sbi).compress_level)
1793                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1794
1795         seq_printf(seq, ",compress_log_size=%u",
1796                         F2FS_OPTION(sbi).compress_log_size);
1797
1798         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1799                 seq_printf(seq, ",compress_extension=%s",
1800                         F2FS_OPTION(sbi).extensions[i]);
1801         }
1802
1803         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1804                 seq_printf(seq, ",nocompress_extension=%s",
1805                         F2FS_OPTION(sbi).noextensions[i]);
1806         }
1807
1808         if (F2FS_OPTION(sbi).compress_chksum)
1809                 seq_puts(seq, ",compress_chksum");
1810
1811         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1812                 seq_printf(seq, ",compress_mode=%s", "fs");
1813         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1814                 seq_printf(seq, ",compress_mode=%s", "user");
1815
1816         if (test_opt(sbi, COMPRESS_CACHE))
1817                 seq_puts(seq, ",compress_cache");
1818 }
1819 #endif
1820
1821 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1822 {
1823         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1824
1825         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1826                 seq_printf(seq, ",background_gc=%s", "sync");
1827         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1828                 seq_printf(seq, ",background_gc=%s", "on");
1829         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1830                 seq_printf(seq, ",background_gc=%s", "off");
1831
1832         if (test_opt(sbi, GC_MERGE))
1833                 seq_puts(seq, ",gc_merge");
1834
1835         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1836                 seq_puts(seq, ",disable_roll_forward");
1837         if (test_opt(sbi, NORECOVERY))
1838                 seq_puts(seq, ",norecovery");
1839         if (test_opt(sbi, DISCARD))
1840                 seq_puts(seq, ",discard");
1841         else
1842                 seq_puts(seq, ",nodiscard");
1843         if (test_opt(sbi, NOHEAP))
1844                 seq_puts(seq, ",no_heap");
1845         else
1846                 seq_puts(seq, ",heap");
1847 #ifdef CONFIG_F2FS_FS_XATTR
1848         if (test_opt(sbi, XATTR_USER))
1849                 seq_puts(seq, ",user_xattr");
1850         else
1851                 seq_puts(seq, ",nouser_xattr");
1852         if (test_opt(sbi, INLINE_XATTR))
1853                 seq_puts(seq, ",inline_xattr");
1854         else
1855                 seq_puts(seq, ",noinline_xattr");
1856         if (test_opt(sbi, INLINE_XATTR_SIZE))
1857                 seq_printf(seq, ",inline_xattr_size=%u",
1858                                         F2FS_OPTION(sbi).inline_xattr_size);
1859 #endif
1860 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1861         if (test_opt(sbi, POSIX_ACL))
1862                 seq_puts(seq, ",acl");
1863         else
1864                 seq_puts(seq, ",noacl");
1865 #endif
1866         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1867                 seq_puts(seq, ",disable_ext_identify");
1868         if (test_opt(sbi, INLINE_DATA))
1869                 seq_puts(seq, ",inline_data");
1870         else
1871                 seq_puts(seq, ",noinline_data");
1872         if (test_opt(sbi, INLINE_DENTRY))
1873                 seq_puts(seq, ",inline_dentry");
1874         else
1875                 seq_puts(seq, ",noinline_dentry");
1876         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1877                 seq_puts(seq, ",flush_merge");
1878         if (test_opt(sbi, NOBARRIER))
1879                 seq_puts(seq, ",nobarrier");
1880         if (test_opt(sbi, FASTBOOT))
1881                 seq_puts(seq, ",fastboot");
1882         if (test_opt(sbi, EXTENT_CACHE))
1883                 seq_puts(seq, ",extent_cache");
1884         else
1885                 seq_puts(seq, ",noextent_cache");
1886         if (test_opt(sbi, DATA_FLUSH))
1887                 seq_puts(seq, ",data_flush");
1888
1889         seq_puts(seq, ",mode=");
1890         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1891                 seq_puts(seq, "adaptive");
1892         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1893                 seq_puts(seq, "lfs");
1894         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1895         if (test_opt(sbi, RESERVE_ROOT))
1896                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1897                                 F2FS_OPTION(sbi).root_reserved_blocks,
1898                                 from_kuid_munged(&init_user_ns,
1899                                         F2FS_OPTION(sbi).s_resuid),
1900                                 from_kgid_munged(&init_user_ns,
1901                                         F2FS_OPTION(sbi).s_resgid));
1902         if (F2FS_IO_SIZE_BITS(sbi))
1903                 seq_printf(seq, ",io_bits=%u",
1904                                 F2FS_OPTION(sbi).write_io_size_bits);
1905 #ifdef CONFIG_F2FS_FAULT_INJECTION
1906         if (test_opt(sbi, FAULT_INJECTION)) {
1907                 seq_printf(seq, ",fault_injection=%u",
1908                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1909                 seq_printf(seq, ",fault_type=%u",
1910                                 F2FS_OPTION(sbi).fault_info.inject_type);
1911         }
1912 #endif
1913 #ifdef CONFIG_QUOTA
1914         if (test_opt(sbi, QUOTA))
1915                 seq_puts(seq, ",quota");
1916         if (test_opt(sbi, USRQUOTA))
1917                 seq_puts(seq, ",usrquota");
1918         if (test_opt(sbi, GRPQUOTA))
1919                 seq_puts(seq, ",grpquota");
1920         if (test_opt(sbi, PRJQUOTA))
1921                 seq_puts(seq, ",prjquota");
1922 #endif
1923         f2fs_show_quota_options(seq, sbi->sb);
1924         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1925                 seq_printf(seq, ",whint_mode=%s", "user-based");
1926         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1927                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1928
1929         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1930
1931         if (sbi->sb->s_flags & SB_INLINECRYPT)
1932                 seq_puts(seq, ",inlinecrypt");
1933
1934         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1935                 seq_printf(seq, ",alloc_mode=%s", "default");
1936         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1937                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1938
1939         if (test_opt(sbi, DISABLE_CHECKPOINT))
1940                 seq_printf(seq, ",checkpoint=disable:%u",
1941                                 F2FS_OPTION(sbi).unusable_cap);
1942         if (test_opt(sbi, MERGE_CHECKPOINT))
1943                 seq_puts(seq, ",checkpoint_merge");
1944         else
1945                 seq_puts(seq, ",nocheckpoint_merge");
1946         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1947                 seq_printf(seq, ",fsync_mode=%s", "posix");
1948         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1949                 seq_printf(seq, ",fsync_mode=%s", "strict");
1950         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1951                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1952
1953 #ifdef CONFIG_F2FS_FS_COMPRESSION
1954         f2fs_show_compress_options(seq, sbi->sb);
1955 #endif
1956
1957         if (test_opt(sbi, ATGC))
1958                 seq_puts(seq, ",atgc");
1959
1960         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
1961                 seq_printf(seq, ",discard_unit=%s", "block");
1962         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
1963                 seq_printf(seq, ",discard_unit=%s", "segment");
1964         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
1965                 seq_printf(seq, ",discard_unit=%s", "section");
1966
1967         return 0;
1968 }
1969
1970 static void default_options(struct f2fs_sb_info *sbi)
1971 {
1972         /* init some FS parameters */
1973         if (f2fs_sb_has_readonly(sbi))
1974                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
1975         else
1976                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
1977
1978         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1979         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1980         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1981         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1982         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1983         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1984         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1985         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1986         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1987         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1988         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1989
1990         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1991
1992         set_opt(sbi, INLINE_XATTR);
1993         set_opt(sbi, INLINE_DATA);
1994         set_opt(sbi, INLINE_DENTRY);
1995         set_opt(sbi, EXTENT_CACHE);
1996         set_opt(sbi, NOHEAP);
1997         clear_opt(sbi, DISABLE_CHECKPOINT);
1998         set_opt(sbi, MERGE_CHECKPOINT);
1999         F2FS_OPTION(sbi).unusable_cap = 0;
2000         sbi->sb->s_flags |= SB_LAZYTIME;
2001         set_opt(sbi, FLUSH_MERGE);
2002         set_opt(sbi, DISCARD);
2003         if (f2fs_sb_has_blkzoned(sbi)) {
2004                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2005                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2006         } else {
2007                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2008                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2009         }
2010
2011 #ifdef CONFIG_F2FS_FS_XATTR
2012         set_opt(sbi, XATTR_USER);
2013 #endif
2014 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2015         set_opt(sbi, POSIX_ACL);
2016 #endif
2017
2018         f2fs_build_fault_attr(sbi, 0, 0);
2019 }
2020
2021 #ifdef CONFIG_QUOTA
2022 static int f2fs_enable_quotas(struct super_block *sb);
2023 #endif
2024
2025 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2026 {
2027         unsigned int s_flags = sbi->sb->s_flags;
2028         struct cp_control cpc;
2029         int err = 0;
2030         int ret;
2031         block_t unusable;
2032
2033         if (s_flags & SB_RDONLY) {
2034                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2035                 return -EINVAL;
2036         }
2037         sbi->sb->s_flags |= SB_ACTIVE;
2038
2039         f2fs_update_time(sbi, DISABLE_TIME);
2040
2041         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2042                 down_write(&sbi->gc_lock);
2043                 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
2044                 if (err == -ENODATA) {
2045                         err = 0;
2046                         break;
2047                 }
2048                 if (err && err != -EAGAIN)
2049                         break;
2050         }
2051
2052         ret = sync_filesystem(sbi->sb);
2053         if (ret || err) {
2054                 err = ret ? ret : err;
2055                 goto restore_flag;
2056         }
2057
2058         unusable = f2fs_get_unusable_blocks(sbi);
2059         if (f2fs_disable_cp_again(sbi, unusable)) {
2060                 err = -EAGAIN;
2061                 goto restore_flag;
2062         }
2063
2064         down_write(&sbi->gc_lock);
2065         cpc.reason = CP_PAUSE;
2066         set_sbi_flag(sbi, SBI_CP_DISABLED);
2067         err = f2fs_write_checkpoint(sbi, &cpc);
2068         if (err)
2069                 goto out_unlock;
2070
2071         spin_lock(&sbi->stat_lock);
2072         sbi->unusable_block_count = unusable;
2073         spin_unlock(&sbi->stat_lock);
2074
2075 out_unlock:
2076         up_write(&sbi->gc_lock);
2077 restore_flag:
2078         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2079         return err;
2080 }
2081
2082 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2083 {
2084         /* we should flush all the data to keep data consistency */
2085         sync_inodes_sb(sbi->sb);
2086
2087         down_write(&sbi->gc_lock);
2088         f2fs_dirty_to_prefree(sbi);
2089
2090         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2091         set_sbi_flag(sbi, SBI_IS_DIRTY);
2092         up_write(&sbi->gc_lock);
2093
2094         f2fs_sync_fs(sbi->sb, 1);
2095 }
2096
2097 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2098 {
2099         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2100         struct f2fs_mount_info org_mount_opt;
2101         unsigned long old_sb_flags;
2102         int err;
2103         bool need_restart_gc = false, need_stop_gc = false;
2104         bool need_restart_ckpt = false, need_stop_ckpt = false;
2105         bool need_restart_flush = false, need_stop_flush = false;
2106         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2107         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2108         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2109         bool no_atgc = !test_opt(sbi, ATGC);
2110         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2111         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2112 #ifdef CONFIG_QUOTA
2113         int i, j;
2114 #endif
2115
2116         /*
2117          * Save the old mount options in case we
2118          * need to restore them.
2119          */
2120         org_mount_opt = sbi->mount_opt;
2121         old_sb_flags = sb->s_flags;
2122
2123 #ifdef CONFIG_QUOTA
2124         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2125         for (i = 0; i < MAXQUOTAS; i++) {
2126                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2127                         org_mount_opt.s_qf_names[i] =
2128                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2129                                 GFP_KERNEL);
2130                         if (!org_mount_opt.s_qf_names[i]) {
2131                                 for (j = 0; j < i; j++)
2132                                         kfree(org_mount_opt.s_qf_names[j]);
2133                                 return -ENOMEM;
2134                         }
2135                 } else {
2136                         org_mount_opt.s_qf_names[i] = NULL;
2137                 }
2138         }
2139 #endif
2140
2141         /* recover superblocks we couldn't write due to previous RO mount */
2142         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2143                 err = f2fs_commit_super(sbi, false);
2144                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2145                           err);
2146                 if (!err)
2147                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2148         }
2149
2150         default_options(sbi);
2151
2152         /* parse mount options */
2153         err = parse_options(sb, data, true);
2154         if (err)
2155                 goto restore_opts;
2156
2157         /*
2158          * Previous and new state of filesystem is RO,
2159          * so skip checking GC and FLUSH_MERGE conditions.
2160          */
2161         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2162                 goto skip;
2163
2164         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2165                 err = -EROFS;
2166                 goto restore_opts;
2167         }
2168
2169 #ifdef CONFIG_QUOTA
2170         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2171                 err = dquot_suspend(sb, -1);
2172                 if (err < 0)
2173                         goto restore_opts;
2174         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2175                 /* dquot_resume needs RW */
2176                 sb->s_flags &= ~SB_RDONLY;
2177                 if (sb_any_quota_suspended(sb)) {
2178                         dquot_resume(sb, -1);
2179                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2180                         err = f2fs_enable_quotas(sb);
2181                         if (err)
2182                                 goto restore_opts;
2183                 }
2184         }
2185 #endif
2186         /* disallow enable atgc dynamically */
2187         if (no_atgc == !!test_opt(sbi, ATGC)) {
2188                 err = -EINVAL;
2189                 f2fs_warn(sbi, "switch atgc option is not allowed");
2190                 goto restore_opts;
2191         }
2192
2193         /* disallow enable/disable extent_cache dynamically */
2194         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2195                 err = -EINVAL;
2196                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2197                 goto restore_opts;
2198         }
2199
2200         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2201                 err = -EINVAL;
2202                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2203                 goto restore_opts;
2204         }
2205
2206         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2207                 err = -EINVAL;
2208                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2209                 goto restore_opts;
2210         }
2211
2212         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2213                 err = -EINVAL;
2214                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2215                 goto restore_opts;
2216         }
2217
2218         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2219                 err = -EINVAL;
2220                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2221                 goto restore_opts;
2222         }
2223
2224         /*
2225          * We stop the GC thread if FS is mounted as RO
2226          * or if background_gc = off is passed in mount
2227          * option. Also sync the filesystem.
2228          */
2229         if ((*flags & SB_RDONLY) ||
2230                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2231                         !test_opt(sbi, GC_MERGE))) {
2232                 if (sbi->gc_thread) {
2233                         f2fs_stop_gc_thread(sbi);
2234                         need_restart_gc = true;
2235                 }
2236         } else if (!sbi->gc_thread) {
2237                 err = f2fs_start_gc_thread(sbi);
2238                 if (err)
2239                         goto restore_opts;
2240                 need_stop_gc = true;
2241         }
2242
2243         if (*flags & SB_RDONLY ||
2244                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
2245                 sync_inodes_sb(sb);
2246
2247                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2248                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2249                 f2fs_sync_fs(sb, 1);
2250                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2251         }
2252
2253         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2254                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2255                 f2fs_stop_ckpt_thread(sbi);
2256                 need_restart_ckpt = true;
2257         } else {
2258                 err = f2fs_start_ckpt_thread(sbi);
2259                 if (err) {
2260                         f2fs_err(sbi,
2261                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2262                             err);
2263                         goto restore_gc;
2264                 }
2265                 need_stop_ckpt = true;
2266         }
2267
2268         /*
2269          * We stop issue flush thread if FS is mounted as RO
2270          * or if flush_merge is not passed in mount option.
2271          */
2272         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2273                 clear_opt(sbi, FLUSH_MERGE);
2274                 f2fs_destroy_flush_cmd_control(sbi, false);
2275                 need_restart_flush = true;
2276         } else {
2277                 err = f2fs_create_flush_cmd_control(sbi);
2278                 if (err)
2279                         goto restore_ckpt;
2280                 need_stop_flush = true;
2281         }
2282
2283         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2284                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2285                         err = f2fs_disable_checkpoint(sbi);
2286                         if (err)
2287                                 goto restore_flush;
2288                 } else {
2289                         f2fs_enable_checkpoint(sbi);
2290                 }
2291         }
2292
2293 skip:
2294 #ifdef CONFIG_QUOTA
2295         /* Release old quota file names */
2296         for (i = 0; i < MAXQUOTAS; i++)
2297                 kfree(org_mount_opt.s_qf_names[i]);
2298 #endif
2299         /* Update the POSIXACL Flag */
2300         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2301                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2302
2303         limit_reserve_root(sbi);
2304         adjust_unusable_cap_perc(sbi);
2305         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2306         return 0;
2307 restore_flush:
2308         if (need_restart_flush) {
2309                 if (f2fs_create_flush_cmd_control(sbi))
2310                         f2fs_warn(sbi, "background flush thread has stopped");
2311         } else if (need_stop_flush) {
2312                 clear_opt(sbi, FLUSH_MERGE);
2313                 f2fs_destroy_flush_cmd_control(sbi, false);
2314         }
2315 restore_ckpt:
2316         if (need_restart_ckpt) {
2317                 if (f2fs_start_ckpt_thread(sbi))
2318                         f2fs_warn(sbi, "background ckpt thread has stopped");
2319         } else if (need_stop_ckpt) {
2320                 f2fs_stop_ckpt_thread(sbi);
2321         }
2322 restore_gc:
2323         if (need_restart_gc) {
2324                 if (f2fs_start_gc_thread(sbi))
2325                         f2fs_warn(sbi, "background gc thread has stopped");
2326         } else if (need_stop_gc) {
2327                 f2fs_stop_gc_thread(sbi);
2328         }
2329 restore_opts:
2330 #ifdef CONFIG_QUOTA
2331         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2332         for (i = 0; i < MAXQUOTAS; i++) {
2333                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2334                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2335         }
2336 #endif
2337         sbi->mount_opt = org_mount_opt;
2338         sb->s_flags = old_sb_flags;
2339         return err;
2340 }
2341
2342 #ifdef CONFIG_QUOTA
2343 /* Read data from quotafile */
2344 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2345                                size_t len, loff_t off)
2346 {
2347         struct inode *inode = sb_dqopt(sb)->files[type];
2348         struct address_space *mapping = inode->i_mapping;
2349         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2350         int offset = off & (sb->s_blocksize - 1);
2351         int tocopy;
2352         size_t toread;
2353         loff_t i_size = i_size_read(inode);
2354         struct page *page;
2355         char *kaddr;
2356
2357         if (off > i_size)
2358                 return 0;
2359
2360         if (off + len > i_size)
2361                 len = i_size - off;
2362         toread = len;
2363         while (toread > 0) {
2364                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2365 repeat:
2366                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2367                 if (IS_ERR(page)) {
2368                         if (PTR_ERR(page) == -ENOMEM) {
2369                                 congestion_wait(BLK_RW_ASYNC,
2370                                                 DEFAULT_IO_TIMEOUT);
2371                                 goto repeat;
2372                         }
2373                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2374                         return PTR_ERR(page);
2375                 }
2376
2377                 lock_page(page);
2378
2379                 if (unlikely(page->mapping != mapping)) {
2380                         f2fs_put_page(page, 1);
2381                         goto repeat;
2382                 }
2383                 if (unlikely(!PageUptodate(page))) {
2384                         f2fs_put_page(page, 1);
2385                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2386                         return -EIO;
2387                 }
2388
2389                 kaddr = kmap_atomic(page);
2390                 memcpy(data, kaddr + offset, tocopy);
2391                 kunmap_atomic(kaddr);
2392                 f2fs_put_page(page, 1);
2393
2394                 offset = 0;
2395                 toread -= tocopy;
2396                 data += tocopy;
2397                 blkidx++;
2398         }
2399         return len;
2400 }
2401
2402 /* Write to quotafile */
2403 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2404                                 const char *data, size_t len, loff_t off)
2405 {
2406         struct inode *inode = sb_dqopt(sb)->files[type];
2407         struct address_space *mapping = inode->i_mapping;
2408         const struct address_space_operations *a_ops = mapping->a_ops;
2409         int offset = off & (sb->s_blocksize - 1);
2410         size_t towrite = len;
2411         struct page *page;
2412         void *fsdata = NULL;
2413         char *kaddr;
2414         int err = 0;
2415         int tocopy;
2416
2417         while (towrite > 0) {
2418                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2419                                                                 towrite);
2420 retry:
2421                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2422                                                         &page, &fsdata);
2423                 if (unlikely(err)) {
2424                         if (err == -ENOMEM) {
2425                                 congestion_wait(BLK_RW_ASYNC,
2426                                                 DEFAULT_IO_TIMEOUT);
2427                                 goto retry;
2428                         }
2429                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2430                         break;
2431                 }
2432
2433                 kaddr = kmap_atomic(page);
2434                 memcpy(kaddr + offset, data, tocopy);
2435                 kunmap_atomic(kaddr);
2436                 flush_dcache_page(page);
2437
2438                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2439                                                 page, fsdata);
2440                 offset = 0;
2441                 towrite -= tocopy;
2442                 off += tocopy;
2443                 data += tocopy;
2444                 cond_resched();
2445         }
2446
2447         if (len == towrite)
2448                 return err;
2449         inode->i_mtime = inode->i_ctime = current_time(inode);
2450         f2fs_mark_inode_dirty_sync(inode, false);
2451         return len - towrite;
2452 }
2453
2454 static struct dquot **f2fs_get_dquots(struct inode *inode)
2455 {
2456         return F2FS_I(inode)->i_dquot;
2457 }
2458
2459 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2460 {
2461         return &F2FS_I(inode)->i_reserved_quota;
2462 }
2463
2464 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2465 {
2466         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2467                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2468                 return 0;
2469         }
2470
2471         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2472                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2473 }
2474
2475 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2476 {
2477         int enabled = 0;
2478         int i, err;
2479
2480         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2481                 err = f2fs_enable_quotas(sbi->sb);
2482                 if (err) {
2483                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2484                         return 0;
2485                 }
2486                 return 1;
2487         }
2488
2489         for (i = 0; i < MAXQUOTAS; i++) {
2490                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2491                         err = f2fs_quota_on_mount(sbi, i);
2492                         if (!err) {
2493                                 enabled = 1;
2494                                 continue;
2495                         }
2496                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2497                                  err, i);
2498                 }
2499         }
2500         return enabled;
2501 }
2502
2503 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2504                              unsigned int flags)
2505 {
2506         struct inode *qf_inode;
2507         unsigned long qf_inum;
2508         int err;
2509
2510         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2511
2512         qf_inum = f2fs_qf_ino(sb, type);
2513         if (!qf_inum)
2514                 return -EPERM;
2515
2516         qf_inode = f2fs_iget(sb, qf_inum);
2517         if (IS_ERR(qf_inode)) {
2518                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2519                 return PTR_ERR(qf_inode);
2520         }
2521
2522         /* Don't account quota for quota files to avoid recursion */
2523         qf_inode->i_flags |= S_NOQUOTA;
2524         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2525         iput(qf_inode);
2526         return err;
2527 }
2528
2529 static int f2fs_enable_quotas(struct super_block *sb)
2530 {
2531         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2532         int type, err = 0;
2533         unsigned long qf_inum;
2534         bool quota_mopt[MAXQUOTAS] = {
2535                 test_opt(sbi, USRQUOTA),
2536                 test_opt(sbi, GRPQUOTA),
2537                 test_opt(sbi, PRJQUOTA),
2538         };
2539
2540         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2541                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2542                 return 0;
2543         }
2544
2545         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2546
2547         for (type = 0; type < MAXQUOTAS; type++) {
2548                 qf_inum = f2fs_qf_ino(sb, type);
2549                 if (qf_inum) {
2550                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2551                                 DQUOT_USAGE_ENABLED |
2552                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2553                         if (err) {
2554                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2555                                          type, err);
2556                                 for (type--; type >= 0; type--)
2557                                         dquot_quota_off(sb, type);
2558                                 set_sbi_flag(F2FS_SB(sb),
2559                                                 SBI_QUOTA_NEED_REPAIR);
2560                                 return err;
2561                         }
2562                 }
2563         }
2564         return 0;
2565 }
2566
2567 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2568 {
2569         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2570         struct address_space *mapping = dqopt->files[type]->i_mapping;
2571         int ret = 0;
2572
2573         ret = dquot_writeback_dquots(sbi->sb, type);
2574         if (ret)
2575                 goto out;
2576
2577         ret = filemap_fdatawrite(mapping);
2578         if (ret)
2579                 goto out;
2580
2581         /* if we are using journalled quota */
2582         if (is_journalled_quota(sbi))
2583                 goto out;
2584
2585         ret = filemap_fdatawait(mapping);
2586
2587         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2588 out:
2589         if (ret)
2590                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2591         return ret;
2592 }
2593
2594 int f2fs_quota_sync(struct super_block *sb, int type)
2595 {
2596         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2597         struct quota_info *dqopt = sb_dqopt(sb);
2598         int cnt;
2599         int ret;
2600
2601         /*
2602          * Now when everything is written we can discard the pagecache so
2603          * that userspace sees the changes.
2604          */
2605         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2606
2607                 if (type != -1 && cnt != type)
2608                         continue;
2609
2610                 if (!sb_has_quota_active(sb, type))
2611                         return 0;
2612
2613                 inode_lock(dqopt->files[cnt]);
2614
2615                 /*
2616                  * do_quotactl
2617                  *  f2fs_quota_sync
2618                  *  down_read(quota_sem)
2619                  *  dquot_writeback_dquots()
2620                  *  f2fs_dquot_commit
2621                  *                            block_operation
2622                  *                            down_read(quota_sem)
2623                  */
2624                 f2fs_lock_op(sbi);
2625                 down_read(&sbi->quota_sem);
2626
2627                 ret = f2fs_quota_sync_file(sbi, cnt);
2628
2629                 up_read(&sbi->quota_sem);
2630                 f2fs_unlock_op(sbi);
2631
2632                 inode_unlock(dqopt->files[cnt]);
2633
2634                 if (ret)
2635                         break;
2636         }
2637         return ret;
2638 }
2639
2640 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2641                                                         const struct path *path)
2642 {
2643         struct inode *inode;
2644         int err;
2645
2646         /* if quota sysfile exists, deny enabling quota with specific file */
2647         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2648                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2649                 return -EBUSY;
2650         }
2651
2652         err = f2fs_quota_sync(sb, type);
2653         if (err)
2654                 return err;
2655
2656         err = dquot_quota_on(sb, type, format_id, path);
2657         if (err)
2658                 return err;
2659
2660         inode = d_inode(path->dentry);
2661
2662         inode_lock(inode);
2663         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2664         f2fs_set_inode_flags(inode);
2665         inode_unlock(inode);
2666         f2fs_mark_inode_dirty_sync(inode, false);
2667
2668         return 0;
2669 }
2670
2671 static int __f2fs_quota_off(struct super_block *sb, int type)
2672 {
2673         struct inode *inode = sb_dqopt(sb)->files[type];
2674         int err;
2675
2676         if (!inode || !igrab(inode))
2677                 return dquot_quota_off(sb, type);
2678
2679         err = f2fs_quota_sync(sb, type);
2680         if (err)
2681                 goto out_put;
2682
2683         err = dquot_quota_off(sb, type);
2684         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2685                 goto out_put;
2686
2687         inode_lock(inode);
2688         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2689         f2fs_set_inode_flags(inode);
2690         inode_unlock(inode);
2691         f2fs_mark_inode_dirty_sync(inode, false);
2692 out_put:
2693         iput(inode);
2694         return err;
2695 }
2696
2697 static int f2fs_quota_off(struct super_block *sb, int type)
2698 {
2699         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2700         int err;
2701
2702         err = __f2fs_quota_off(sb, type);
2703
2704         /*
2705          * quotactl can shutdown journalled quota, result in inconsistence
2706          * between quota record and fs data by following updates, tag the
2707          * flag to let fsck be aware of it.
2708          */
2709         if (is_journalled_quota(sbi))
2710                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2711         return err;
2712 }
2713
2714 void f2fs_quota_off_umount(struct super_block *sb)
2715 {
2716         int type;
2717         int err;
2718
2719         for (type = 0; type < MAXQUOTAS; type++) {
2720                 err = __f2fs_quota_off(sb, type);
2721                 if (err) {
2722                         int ret = dquot_quota_off(sb, type);
2723
2724                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2725                                  type, err, ret);
2726                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2727                 }
2728         }
2729         /*
2730          * In case of checkpoint=disable, we must flush quota blocks.
2731          * This can cause NULL exception for node_inode in end_io, since
2732          * put_super already dropped it.
2733          */
2734         sync_filesystem(sb);
2735 }
2736
2737 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2738 {
2739         struct quota_info *dqopt = sb_dqopt(sb);
2740         int type;
2741
2742         for (type = 0; type < MAXQUOTAS; type++) {
2743                 if (!dqopt->files[type])
2744                         continue;
2745                 f2fs_inode_synced(dqopt->files[type]);
2746         }
2747 }
2748
2749 static int f2fs_dquot_commit(struct dquot *dquot)
2750 {
2751         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2752         int ret;
2753
2754         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2755         ret = dquot_commit(dquot);
2756         if (ret < 0)
2757                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2758         up_read(&sbi->quota_sem);
2759         return ret;
2760 }
2761
2762 static int f2fs_dquot_acquire(struct dquot *dquot)
2763 {
2764         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2765         int ret;
2766
2767         down_read(&sbi->quota_sem);
2768         ret = dquot_acquire(dquot);
2769         if (ret < 0)
2770                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2771         up_read(&sbi->quota_sem);
2772         return ret;
2773 }
2774
2775 static int f2fs_dquot_release(struct dquot *dquot)
2776 {
2777         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2778         int ret = dquot_release(dquot);
2779
2780         if (ret < 0)
2781                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2782         return ret;
2783 }
2784
2785 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2786 {
2787         struct super_block *sb = dquot->dq_sb;
2788         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2789         int ret = dquot_mark_dquot_dirty(dquot);
2790
2791         /* if we are using journalled quota */
2792         if (is_journalled_quota(sbi))
2793                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2794
2795         return ret;
2796 }
2797
2798 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2799 {
2800         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2801         int ret = dquot_commit_info(sb, type);
2802
2803         if (ret < 0)
2804                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2805         return ret;
2806 }
2807
2808 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2809 {
2810         *projid = F2FS_I(inode)->i_projid;
2811         return 0;
2812 }
2813
2814 static const struct dquot_operations f2fs_quota_operations = {
2815         .get_reserved_space = f2fs_get_reserved_space,
2816         .write_dquot    = f2fs_dquot_commit,
2817         .acquire_dquot  = f2fs_dquot_acquire,
2818         .release_dquot  = f2fs_dquot_release,
2819         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2820         .write_info     = f2fs_dquot_commit_info,
2821         .alloc_dquot    = dquot_alloc,
2822         .destroy_dquot  = dquot_destroy,
2823         .get_projid     = f2fs_get_projid,
2824         .get_next_id    = dquot_get_next_id,
2825 };
2826
2827 static const struct quotactl_ops f2fs_quotactl_ops = {
2828         .quota_on       = f2fs_quota_on,
2829         .quota_off      = f2fs_quota_off,
2830         .quota_sync     = f2fs_quota_sync,
2831         .get_state      = dquot_get_state,
2832         .set_info       = dquot_set_dqinfo,
2833         .get_dqblk      = dquot_get_dqblk,
2834         .set_dqblk      = dquot_set_dqblk,
2835         .get_nextdqblk  = dquot_get_next_dqblk,
2836 };
2837 #else
2838 int f2fs_quota_sync(struct super_block *sb, int type)
2839 {
2840         return 0;
2841 }
2842
2843 void f2fs_quota_off_umount(struct super_block *sb)
2844 {
2845 }
2846 #endif
2847
2848 static const struct super_operations f2fs_sops = {
2849         .alloc_inode    = f2fs_alloc_inode,
2850         .free_inode     = f2fs_free_inode,
2851         .drop_inode     = f2fs_drop_inode,
2852         .write_inode    = f2fs_write_inode,
2853         .dirty_inode    = f2fs_dirty_inode,
2854         .show_options   = f2fs_show_options,
2855 #ifdef CONFIG_QUOTA
2856         .quota_read     = f2fs_quota_read,
2857         .quota_write    = f2fs_quota_write,
2858         .get_dquots     = f2fs_get_dquots,
2859 #endif
2860         .evict_inode    = f2fs_evict_inode,
2861         .put_super      = f2fs_put_super,
2862         .sync_fs        = f2fs_sync_fs,
2863         .freeze_fs      = f2fs_freeze,
2864         .unfreeze_fs    = f2fs_unfreeze,
2865         .statfs         = f2fs_statfs,
2866         .remount_fs     = f2fs_remount,
2867 };
2868
2869 #ifdef CONFIG_FS_ENCRYPTION
2870 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2871 {
2872         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2873                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2874                                 ctx, len, NULL);
2875 }
2876
2877 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2878                                                         void *fs_data)
2879 {
2880         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2881
2882         /*
2883          * Encrypting the root directory is not allowed because fsck
2884          * expects lost+found directory to exist and remain unencrypted
2885          * if LOST_FOUND feature is enabled.
2886          *
2887          */
2888         if (f2fs_sb_has_lost_found(sbi) &&
2889                         inode->i_ino == F2FS_ROOT_INO(sbi))
2890                 return -EPERM;
2891
2892         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2893                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2894                                 ctx, len, fs_data, XATTR_CREATE);
2895 }
2896
2897 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2898 {
2899         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2900 }
2901
2902 static bool f2fs_has_stable_inodes(struct super_block *sb)
2903 {
2904         return true;
2905 }
2906
2907 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2908                                        int *ino_bits_ret, int *lblk_bits_ret)
2909 {
2910         *ino_bits_ret = 8 * sizeof(nid_t);
2911         *lblk_bits_ret = 8 * sizeof(block_t);
2912 }
2913
2914 static int f2fs_get_num_devices(struct super_block *sb)
2915 {
2916         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2917
2918         if (f2fs_is_multi_device(sbi))
2919                 return sbi->s_ndevs;
2920         return 1;
2921 }
2922
2923 static void f2fs_get_devices(struct super_block *sb,
2924                              struct request_queue **devs)
2925 {
2926         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2927         int i;
2928
2929         for (i = 0; i < sbi->s_ndevs; i++)
2930                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2931 }
2932
2933 static const struct fscrypt_operations f2fs_cryptops = {
2934         .key_prefix             = "f2fs:",
2935         .get_context            = f2fs_get_context,
2936         .set_context            = f2fs_set_context,
2937         .get_dummy_policy       = f2fs_get_dummy_policy,
2938         .empty_dir              = f2fs_empty_dir,
2939         .max_namelen            = F2FS_NAME_LEN,
2940         .has_stable_inodes      = f2fs_has_stable_inodes,
2941         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2942         .get_num_devices        = f2fs_get_num_devices,
2943         .get_devices            = f2fs_get_devices,
2944 };
2945 #endif
2946
2947 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2948                 u64 ino, u32 generation)
2949 {
2950         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2951         struct inode *inode;
2952
2953         if (f2fs_check_nid_range(sbi, ino))
2954                 return ERR_PTR(-ESTALE);
2955
2956         /*
2957          * f2fs_iget isn't quite right if the inode is currently unallocated!
2958          * However f2fs_iget currently does appropriate checks to handle stale
2959          * inodes so everything is OK.
2960          */
2961         inode = f2fs_iget(sb, ino);
2962         if (IS_ERR(inode))
2963                 return ERR_CAST(inode);
2964         if (unlikely(generation && inode->i_generation != generation)) {
2965                 /* we didn't find the right inode.. */
2966                 iput(inode);
2967                 return ERR_PTR(-ESTALE);
2968         }
2969         return inode;
2970 }
2971
2972 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2973                 int fh_len, int fh_type)
2974 {
2975         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2976                                     f2fs_nfs_get_inode);
2977 }
2978
2979 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2980                 int fh_len, int fh_type)
2981 {
2982         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2983                                     f2fs_nfs_get_inode);
2984 }
2985
2986 static const struct export_operations f2fs_export_ops = {
2987         .fh_to_dentry = f2fs_fh_to_dentry,
2988         .fh_to_parent = f2fs_fh_to_parent,
2989         .get_parent = f2fs_get_parent,
2990 };
2991
2992 loff_t max_file_blocks(struct inode *inode)
2993 {
2994         loff_t result = 0;
2995         loff_t leaf_count;
2996
2997         /*
2998          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2999          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3000          * space in inode.i_addr, it will be more safe to reassign
3001          * result as zero.
3002          */
3003
3004         if (inode && f2fs_compressed_file(inode))
3005                 leaf_count = ADDRS_PER_BLOCK(inode);
3006         else
3007                 leaf_count = DEF_ADDRS_PER_BLOCK;
3008
3009         /* two direct node blocks */
3010         result += (leaf_count * 2);
3011
3012         /* two indirect node blocks */
3013         leaf_count *= NIDS_PER_BLOCK;
3014         result += (leaf_count * 2);
3015
3016         /* one double indirect node block */
3017         leaf_count *= NIDS_PER_BLOCK;
3018         result += leaf_count;
3019
3020         return result;
3021 }
3022
3023 static int __f2fs_commit_super(struct buffer_head *bh,
3024                         struct f2fs_super_block *super)
3025 {
3026         lock_buffer(bh);
3027         if (super)
3028                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3029         set_buffer_dirty(bh);
3030         unlock_buffer(bh);
3031
3032         /* it's rare case, we can do fua all the time */
3033         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3034 }
3035
3036 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3037                                         struct buffer_head *bh)
3038 {
3039         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3040                                         (bh->b_data + F2FS_SUPER_OFFSET);
3041         struct super_block *sb = sbi->sb;
3042         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3043         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3044         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3045         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3046         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3047         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3048         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3049         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3050         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3051         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3052         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3053         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3054         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3055         u64 main_end_blkaddr = main_blkaddr +
3056                                 (segment_count_main << log_blocks_per_seg);
3057         u64 seg_end_blkaddr = segment0_blkaddr +
3058                                 (segment_count << log_blocks_per_seg);
3059
3060         if (segment0_blkaddr != cp_blkaddr) {
3061                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3062                           segment0_blkaddr, cp_blkaddr);
3063                 return true;
3064         }
3065
3066         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3067                                                         sit_blkaddr) {
3068                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3069                           cp_blkaddr, sit_blkaddr,
3070                           segment_count_ckpt << log_blocks_per_seg);
3071                 return true;
3072         }
3073
3074         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3075                                                         nat_blkaddr) {
3076                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3077                           sit_blkaddr, nat_blkaddr,
3078                           segment_count_sit << log_blocks_per_seg);
3079                 return true;
3080         }
3081
3082         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3083                                                         ssa_blkaddr) {
3084                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3085                           nat_blkaddr, ssa_blkaddr,
3086                           segment_count_nat << log_blocks_per_seg);
3087                 return true;
3088         }
3089
3090         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3091                                                         main_blkaddr) {
3092                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3093                           ssa_blkaddr, main_blkaddr,
3094                           segment_count_ssa << log_blocks_per_seg);
3095                 return true;
3096         }
3097
3098         if (main_end_blkaddr > seg_end_blkaddr) {
3099                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3100                           main_blkaddr, seg_end_blkaddr,
3101                           segment_count_main << log_blocks_per_seg);
3102                 return true;
3103         } else if (main_end_blkaddr < seg_end_blkaddr) {
3104                 int err = 0;
3105                 char *res;
3106
3107                 /* fix in-memory information all the time */
3108                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3109                                 segment0_blkaddr) >> log_blocks_per_seg);
3110
3111                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3112                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3113                         res = "internally";
3114                 } else {
3115                         err = __f2fs_commit_super(bh, NULL);
3116                         res = err ? "failed" : "done";
3117                 }
3118                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3119                           res, main_blkaddr, seg_end_blkaddr,
3120                           segment_count_main << log_blocks_per_seg);
3121                 if (err)
3122                         return true;
3123         }
3124         return false;
3125 }
3126
3127 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3128                                 struct buffer_head *bh)
3129 {
3130         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3131         block_t total_sections, blocks_per_seg;
3132         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3133                                         (bh->b_data + F2FS_SUPER_OFFSET);
3134         size_t crc_offset = 0;
3135         __u32 crc = 0;
3136
3137         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3138                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3139                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3140                 return -EINVAL;
3141         }
3142
3143         /* Check checksum_offset and crc in superblock */
3144         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3145                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3146                 if (crc_offset !=
3147                         offsetof(struct f2fs_super_block, crc)) {
3148                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3149                                   crc_offset);
3150                         return -EFSCORRUPTED;
3151                 }
3152                 crc = le32_to_cpu(raw_super->crc);
3153                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3154                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3155                         return -EFSCORRUPTED;
3156                 }
3157         }
3158
3159         /* Currently, support only 4KB block size */
3160         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3161                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3162                           le32_to_cpu(raw_super->log_blocksize),
3163                           F2FS_BLKSIZE_BITS);
3164                 return -EFSCORRUPTED;
3165         }
3166
3167         /* check log blocks per segment */
3168         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3169                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3170                           le32_to_cpu(raw_super->log_blocks_per_seg));
3171                 return -EFSCORRUPTED;
3172         }
3173
3174         /* Currently, support 512/1024/2048/4096 bytes sector size */
3175         if (le32_to_cpu(raw_super->log_sectorsize) >
3176                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3177                 le32_to_cpu(raw_super->log_sectorsize) <
3178                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3179                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3180                           le32_to_cpu(raw_super->log_sectorsize));
3181                 return -EFSCORRUPTED;
3182         }
3183         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3184                 le32_to_cpu(raw_super->log_sectorsize) !=
3185                         F2FS_MAX_LOG_SECTOR_SIZE) {
3186                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3187                           le32_to_cpu(raw_super->log_sectors_per_block),
3188                           le32_to_cpu(raw_super->log_sectorsize));
3189                 return -EFSCORRUPTED;
3190         }
3191
3192         segment_count = le32_to_cpu(raw_super->segment_count);
3193         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3194         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3195         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3196         total_sections = le32_to_cpu(raw_super->section_count);
3197
3198         /* blocks_per_seg should be 512, given the above check */
3199         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3200
3201         if (segment_count > F2FS_MAX_SEGMENT ||
3202                                 segment_count < F2FS_MIN_SEGMENTS) {
3203                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3204                 return -EFSCORRUPTED;
3205         }
3206
3207         if (total_sections > segment_count_main || total_sections < 1 ||
3208                         segs_per_sec > segment_count || !segs_per_sec) {
3209                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3210                           segment_count, total_sections, segs_per_sec);
3211                 return -EFSCORRUPTED;
3212         }
3213
3214         if (segment_count_main != total_sections * segs_per_sec) {
3215                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3216                           segment_count_main, total_sections, segs_per_sec);
3217                 return -EFSCORRUPTED;
3218         }
3219
3220         if ((segment_count / segs_per_sec) < total_sections) {
3221                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3222                           segment_count, segs_per_sec, total_sections);
3223                 return -EFSCORRUPTED;
3224         }
3225
3226         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3227                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3228                           segment_count, le64_to_cpu(raw_super->block_count));
3229                 return -EFSCORRUPTED;
3230         }
3231
3232         if (RDEV(0).path[0]) {
3233                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3234                 int i = 1;
3235
3236                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3237                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3238                         i++;
3239                 }
3240                 if (segment_count != dev_seg_count) {
3241                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3242                                         segment_count, dev_seg_count);
3243                         return -EFSCORRUPTED;
3244                 }
3245         } else {
3246                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3247                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3248                         f2fs_info(sbi, "Zoned block device path is missing");
3249                         return -EFSCORRUPTED;
3250                 }
3251         }
3252
3253         if (secs_per_zone > total_sections || !secs_per_zone) {
3254                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3255                           secs_per_zone, total_sections);
3256                 return -EFSCORRUPTED;
3257         }
3258         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3259                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3260                         (le32_to_cpu(raw_super->extension_count) +
3261                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3262                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3263                           le32_to_cpu(raw_super->extension_count),
3264                           raw_super->hot_ext_count,
3265                           F2FS_MAX_EXTENSION);
3266                 return -EFSCORRUPTED;
3267         }
3268
3269         if (le32_to_cpu(raw_super->cp_payload) >=
3270                                 (blocks_per_seg - F2FS_CP_PACKS -
3271                                 NR_CURSEG_PERSIST_TYPE)) {
3272                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3273                           le32_to_cpu(raw_super->cp_payload),
3274                           blocks_per_seg - F2FS_CP_PACKS -
3275                           NR_CURSEG_PERSIST_TYPE);
3276                 return -EFSCORRUPTED;
3277         }
3278
3279         /* check reserved ino info */
3280         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3281                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3282                 le32_to_cpu(raw_super->root_ino) != 3) {
3283                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3284                           le32_to_cpu(raw_super->node_ino),
3285                           le32_to_cpu(raw_super->meta_ino),
3286                           le32_to_cpu(raw_super->root_ino));
3287                 return -EFSCORRUPTED;
3288         }
3289
3290         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3291         if (sanity_check_area_boundary(sbi, bh))
3292                 return -EFSCORRUPTED;
3293
3294         return 0;
3295 }
3296
3297 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3298 {
3299         unsigned int total, fsmeta;
3300         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3301         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3302         unsigned int ovp_segments, reserved_segments;
3303         unsigned int main_segs, blocks_per_seg;
3304         unsigned int sit_segs, nat_segs;
3305         unsigned int sit_bitmap_size, nat_bitmap_size;
3306         unsigned int log_blocks_per_seg;
3307         unsigned int segment_count_main;
3308         unsigned int cp_pack_start_sum, cp_payload;
3309         block_t user_block_count, valid_user_blocks;
3310         block_t avail_node_count, valid_node_count;
3311         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3312         int i, j;
3313
3314         total = le32_to_cpu(raw_super->segment_count);
3315         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3316         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3317         fsmeta += sit_segs;
3318         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3319         fsmeta += nat_segs;
3320         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3321         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3322
3323         if (unlikely(fsmeta >= total))
3324                 return 1;
3325
3326         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3327         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3328
3329         if (!f2fs_sb_has_readonly(sbi) &&
3330                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3331                         ovp_segments == 0 || reserved_segments == 0)) {
3332                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3333                 return 1;
3334         }
3335         user_block_count = le64_to_cpu(ckpt->user_block_count);
3336         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3337                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3338         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3339         if (!user_block_count || user_block_count >=
3340                         segment_count_main << log_blocks_per_seg) {
3341                 f2fs_err(sbi, "Wrong user_block_count: %u",
3342                          user_block_count);
3343                 return 1;
3344         }
3345
3346         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3347         if (valid_user_blocks > user_block_count) {
3348                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3349                          valid_user_blocks, user_block_count);
3350                 return 1;
3351         }
3352
3353         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3354         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3355         if (valid_node_count > avail_node_count) {
3356                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3357                          valid_node_count, avail_node_count);
3358                 return 1;
3359         }
3360
3361         main_segs = le32_to_cpu(raw_super->segment_count_main);
3362         blocks_per_seg = sbi->blocks_per_seg;
3363
3364         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3365                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3366                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3367                         return 1;
3368
3369                 if (f2fs_sb_has_readonly(sbi))
3370                         goto check_data;
3371
3372                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3373                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3374                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3375                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3376                                          i, j,
3377                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3378                                 return 1;
3379                         }
3380                 }
3381         }
3382 check_data:
3383         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3384                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3385                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3386                         return 1;
3387
3388                 if (f2fs_sb_has_readonly(sbi))
3389                         goto skip_cross;
3390
3391                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3392                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3393                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3394                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3395                                          i, j,
3396                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3397                                 return 1;
3398                         }
3399                 }
3400         }
3401         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3402                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3403                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3404                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3405                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3406                                          i, j,
3407                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3408                                 return 1;
3409                         }
3410                 }
3411         }
3412 skip_cross:
3413         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3414         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3415
3416         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3417                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3418                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3419                          sit_bitmap_size, nat_bitmap_size);
3420                 return 1;
3421         }
3422
3423         cp_pack_start_sum = __start_sum_addr(sbi);
3424         cp_payload = __cp_payload(sbi);
3425         if (cp_pack_start_sum < cp_payload + 1 ||
3426                 cp_pack_start_sum > blocks_per_seg - 1 -
3427                         NR_CURSEG_PERSIST_TYPE) {
3428                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3429                          cp_pack_start_sum);
3430                 return 1;
3431         }
3432
3433         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3434                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3435                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3436                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3437                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3438                           le32_to_cpu(ckpt->checksum_offset));
3439                 return 1;
3440         }
3441
3442         nat_blocks = nat_segs << log_blocks_per_seg;
3443         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3444         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3445         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3446                 (cp_payload + F2FS_CP_PACKS +
3447                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3448                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3449                           cp_payload, nat_bits_blocks);
3450                 return -EFSCORRUPTED;
3451         }
3452
3453         if (unlikely(f2fs_cp_error(sbi))) {
3454                 f2fs_err(sbi, "A bug case: need to run fsck");
3455                 return 1;
3456         }
3457         return 0;
3458 }
3459
3460 static void init_sb_info(struct f2fs_sb_info *sbi)
3461 {
3462         struct f2fs_super_block *raw_super = sbi->raw_super;
3463         int i;
3464
3465         sbi->log_sectors_per_block =
3466                 le32_to_cpu(raw_super->log_sectors_per_block);
3467         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3468         sbi->blocksize = 1 << sbi->log_blocksize;
3469         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3470         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3471         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3472         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3473         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3474         sbi->total_node_count =
3475                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3476                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3477         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3478         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3479         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3480         sbi->cur_victim_sec = NULL_SECNO;
3481         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3482         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3483         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3484         sbi->migration_granularity = sbi->segs_per_sec;
3485         sbi->seq_file_ra_mul = MIN_RA_MUL;
3486
3487         sbi->dir_level = DEF_DIR_LEVEL;
3488         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3489         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3490         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3491         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3492         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3493         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3494                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3495         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3496
3497         for (i = 0; i < NR_COUNT_TYPE; i++)
3498                 atomic_set(&sbi->nr_pages[i], 0);
3499
3500         for (i = 0; i < META; i++)
3501                 atomic_set(&sbi->wb_sync_req[i], 0);
3502
3503         INIT_LIST_HEAD(&sbi->s_list);
3504         mutex_init(&sbi->umount_mutex);
3505         init_rwsem(&sbi->io_order_lock);
3506         spin_lock_init(&sbi->cp_lock);
3507
3508         sbi->dirty_device = 0;
3509         spin_lock_init(&sbi->dev_lock);
3510
3511         init_rwsem(&sbi->sb_lock);
3512         init_rwsem(&sbi->pin_sem);
3513 }
3514
3515 static int init_percpu_info(struct f2fs_sb_info *sbi)
3516 {
3517         int err;
3518
3519         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3520         if (err)
3521                 return err;
3522
3523         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3524                                                                 GFP_KERNEL);
3525         if (err)
3526                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3527
3528         return err;
3529 }
3530
3531 #ifdef CONFIG_BLK_DEV_ZONED
3532
3533 struct f2fs_report_zones_args {
3534         struct f2fs_dev_info *dev;
3535         bool zone_cap_mismatch;
3536 };
3537
3538 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3539                               void *data)
3540 {
3541         struct f2fs_report_zones_args *rz_args = data;
3542
3543         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3544                 return 0;
3545
3546         set_bit(idx, rz_args->dev->blkz_seq);
3547         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3548                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3549         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3550                 rz_args->zone_cap_mismatch = true;
3551
3552         return 0;
3553 }
3554
3555 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3556 {
3557         struct block_device *bdev = FDEV(devi).bdev;
3558         sector_t nr_sectors = bdev_nr_sectors(bdev);
3559         struct f2fs_report_zones_args rep_zone_arg;
3560         int ret;
3561
3562         if (!f2fs_sb_has_blkzoned(sbi))
3563                 return 0;
3564
3565         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3566                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3567                 return -EINVAL;
3568         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3569         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3570                                 __ilog2_u32(sbi->blocks_per_blkz))
3571                 return -EINVAL;
3572         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3573         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3574                                         sbi->log_blocks_per_blkz;
3575         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3576                 FDEV(devi).nr_blkz++;
3577
3578         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3579                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3580                                         * sizeof(unsigned long),
3581                                         GFP_KERNEL);
3582         if (!FDEV(devi).blkz_seq)
3583                 return -ENOMEM;
3584
3585         /* Get block zones type and zone-capacity */
3586         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3587                                         FDEV(devi).nr_blkz * sizeof(block_t),
3588                                         GFP_KERNEL);
3589         if (!FDEV(devi).zone_capacity_blocks)
3590                 return -ENOMEM;
3591
3592         rep_zone_arg.dev = &FDEV(devi);
3593         rep_zone_arg.zone_cap_mismatch = false;
3594
3595         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3596                                   &rep_zone_arg);
3597         if (ret < 0)
3598                 return ret;
3599
3600         if (!rep_zone_arg.zone_cap_mismatch) {
3601                 kfree(FDEV(devi).zone_capacity_blocks);
3602                 FDEV(devi).zone_capacity_blocks = NULL;
3603         }
3604
3605         return 0;
3606 }
3607 #endif
3608
3609 /*
3610  * Read f2fs raw super block.
3611  * Because we have two copies of super block, so read both of them
3612  * to get the first valid one. If any one of them is broken, we pass
3613  * them recovery flag back to the caller.
3614  */
3615 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3616                         struct f2fs_super_block **raw_super,
3617                         int *valid_super_block, int *recovery)
3618 {
3619         struct super_block *sb = sbi->sb;
3620         int block;
3621         struct buffer_head *bh;
3622         struct f2fs_super_block *super;
3623         int err = 0;
3624
3625         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3626         if (!super)
3627                 return -ENOMEM;
3628
3629         for (block = 0; block < 2; block++) {
3630                 bh = sb_bread(sb, block);
3631                 if (!bh) {
3632                         f2fs_err(sbi, "Unable to read %dth superblock",
3633                                  block + 1);
3634                         err = -EIO;
3635                         *recovery = 1;
3636                         continue;
3637                 }
3638
3639                 /* sanity checking of raw super */
3640                 err = sanity_check_raw_super(sbi, bh);
3641                 if (err) {
3642                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3643                                  block + 1);
3644                         brelse(bh);
3645                         *recovery = 1;
3646                         continue;
3647                 }
3648
3649                 if (!*raw_super) {
3650                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3651                                                         sizeof(*super));
3652                         *valid_super_block = block;
3653                         *raw_super = super;
3654                 }
3655                 brelse(bh);
3656         }
3657
3658         /* No valid superblock */
3659         if (!*raw_super)
3660                 kfree(super);
3661         else
3662                 err = 0;
3663
3664         return err;
3665 }
3666
3667 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3668 {
3669         struct buffer_head *bh;
3670         __u32 crc = 0;
3671         int err;
3672
3673         if ((recover && f2fs_readonly(sbi->sb)) ||
3674                                 bdev_read_only(sbi->sb->s_bdev)) {
3675                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3676                 return -EROFS;
3677         }
3678
3679         /* we should update superblock crc here */
3680         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3681                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3682                                 offsetof(struct f2fs_super_block, crc));
3683                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3684         }
3685
3686         /* write back-up superblock first */
3687         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3688         if (!bh)
3689                 return -EIO;
3690         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3691         brelse(bh);
3692
3693         /* if we are in recovery path, skip writing valid superblock */
3694         if (recover || err)
3695                 return err;
3696
3697         /* write current valid superblock */
3698         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3699         if (!bh)
3700                 return -EIO;
3701         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3702         brelse(bh);
3703         return err;
3704 }
3705
3706 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3707 {
3708         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3709         unsigned int max_devices = MAX_DEVICES;
3710         int i;
3711
3712         /* Initialize single device information */
3713         if (!RDEV(0).path[0]) {
3714                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3715                         return 0;
3716                 max_devices = 1;
3717         }
3718
3719         /*
3720          * Initialize multiple devices information, or single
3721          * zoned block device information.
3722          */
3723         sbi->devs = f2fs_kzalloc(sbi,
3724                                  array_size(max_devices,
3725                                             sizeof(struct f2fs_dev_info)),
3726                                  GFP_KERNEL);
3727         if (!sbi->devs)
3728                 return -ENOMEM;
3729
3730         for (i = 0; i < max_devices; i++) {
3731
3732                 if (i > 0 && !RDEV(i).path[0])
3733                         break;
3734
3735                 if (max_devices == 1) {
3736                         /* Single zoned block device mount */
3737                         FDEV(0).bdev =
3738                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3739                                         sbi->sb->s_mode, sbi->sb->s_type);
3740                 } else {
3741                         /* Multi-device mount */
3742                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3743                         FDEV(i).total_segments =
3744                                 le32_to_cpu(RDEV(i).total_segments);
3745                         if (i == 0) {
3746                                 FDEV(i).start_blk = 0;
3747                                 FDEV(i).end_blk = FDEV(i).start_blk +
3748                                     (FDEV(i).total_segments <<
3749                                     sbi->log_blocks_per_seg) - 1 +
3750                                     le32_to_cpu(raw_super->segment0_blkaddr);
3751                         } else {
3752                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3753                                 FDEV(i).end_blk = FDEV(i).start_blk +
3754                                         (FDEV(i).total_segments <<
3755                                         sbi->log_blocks_per_seg) - 1;
3756                         }
3757                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3758                                         sbi->sb->s_mode, sbi->sb->s_type);
3759                 }
3760                 if (IS_ERR(FDEV(i).bdev))
3761                         return PTR_ERR(FDEV(i).bdev);
3762
3763                 /* to release errored devices */
3764                 sbi->s_ndevs = i + 1;
3765
3766 #ifdef CONFIG_BLK_DEV_ZONED
3767                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3768                                 !f2fs_sb_has_blkzoned(sbi)) {
3769                         f2fs_err(sbi, "Zoned block device feature not enabled");
3770                         return -EINVAL;
3771                 }
3772                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3773                         if (init_blkz_info(sbi, i)) {
3774                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3775                                 return -EINVAL;
3776                         }
3777                         if (max_devices == 1)
3778                                 break;
3779                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3780                                   i, FDEV(i).path,
3781                                   FDEV(i).total_segments,
3782                                   FDEV(i).start_blk, FDEV(i).end_blk,
3783                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3784                                   "Host-aware" : "Host-managed");
3785                         continue;
3786                 }
3787 #endif
3788                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3789                           i, FDEV(i).path,
3790                           FDEV(i).total_segments,
3791                           FDEV(i).start_blk, FDEV(i).end_blk);
3792         }
3793         f2fs_info(sbi,
3794                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3795         return 0;
3796 }
3797
3798 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3799 {
3800 #ifdef CONFIG_UNICODE
3801         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3802                 const struct f2fs_sb_encodings *encoding_info;
3803                 struct unicode_map *encoding;
3804                 __u16 encoding_flags;
3805
3806                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3807                                           &encoding_flags)) {
3808                         f2fs_err(sbi,
3809                                  "Encoding requested by superblock is unknown");
3810                         return -EINVAL;
3811                 }
3812
3813                 encoding = utf8_load(encoding_info->version);
3814                 if (IS_ERR(encoding)) {
3815                         f2fs_err(sbi,
3816                                  "can't mount with superblock charset: %s-%s "
3817                                  "not supported by the kernel. flags: 0x%x.",
3818                                  encoding_info->name, encoding_info->version,
3819                                  encoding_flags);
3820                         return PTR_ERR(encoding);
3821                 }
3822                 f2fs_info(sbi, "Using encoding defined by superblock: "
3823                          "%s-%s with flags 0x%hx", encoding_info->name,
3824                          encoding_info->version?:"\b", encoding_flags);
3825
3826                 sbi->sb->s_encoding = encoding;
3827                 sbi->sb->s_encoding_flags = encoding_flags;
3828         }
3829 #else
3830         if (f2fs_sb_has_casefold(sbi)) {
3831                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3832                 return -EINVAL;
3833         }
3834 #endif
3835         return 0;
3836 }
3837
3838 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3839 {
3840         struct f2fs_sm_info *sm_i = SM_I(sbi);
3841
3842         /* adjust parameters according to the volume size */
3843         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3844                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3845                 if (f2fs_block_unit_discard(sbi))
3846                         sm_i->dcc_info->discard_granularity = 1;
3847                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3848         }
3849
3850         sbi->readdir_ra = 1;
3851 }
3852
3853 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3854 {
3855         struct f2fs_sb_info *sbi;
3856         struct f2fs_super_block *raw_super;
3857         struct inode *root;
3858         int err;
3859         bool skip_recovery = false, need_fsck = false;
3860         char *options = NULL;
3861         int recovery, i, valid_super_block;
3862         struct curseg_info *seg_i;
3863         int retry_cnt = 1;
3864
3865 try_onemore:
3866         err = -EINVAL;
3867         raw_super = NULL;
3868         valid_super_block = -1;
3869         recovery = 0;
3870
3871         /* allocate memory for f2fs-specific super block info */
3872         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3873         if (!sbi)
3874                 return -ENOMEM;
3875
3876         sbi->sb = sb;
3877
3878         /* Load the checksum driver */
3879         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3880         if (IS_ERR(sbi->s_chksum_driver)) {
3881                 f2fs_err(sbi, "Cannot load crc32 driver.");
3882                 err = PTR_ERR(sbi->s_chksum_driver);
3883                 sbi->s_chksum_driver = NULL;
3884                 goto free_sbi;
3885         }
3886
3887         /* set a block size */
3888         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3889                 f2fs_err(sbi, "unable to set blocksize");
3890                 goto free_sbi;
3891         }
3892
3893         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3894                                                                 &recovery);
3895         if (err)
3896                 goto free_sbi;
3897
3898         sb->s_fs_info = sbi;
3899         sbi->raw_super = raw_super;
3900
3901         /* precompute checksum seed for metadata */
3902         if (f2fs_sb_has_inode_chksum(sbi))
3903                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3904                                                 sizeof(raw_super->uuid));
3905
3906         default_options(sbi);
3907         /* parse mount options */
3908         options = kstrdup((const char *)data, GFP_KERNEL);
3909         if (data && !options) {
3910                 err = -ENOMEM;
3911                 goto free_sb_buf;
3912         }
3913
3914         err = parse_options(sb, options, false);
3915         if (err)
3916                 goto free_options;
3917
3918         sb->s_maxbytes = max_file_blocks(NULL) <<
3919                                 le32_to_cpu(raw_super->log_blocksize);
3920         sb->s_max_links = F2FS_LINK_MAX;
3921
3922         err = f2fs_setup_casefold(sbi);
3923         if (err)
3924                 goto free_options;
3925
3926 #ifdef CONFIG_QUOTA
3927         sb->dq_op = &f2fs_quota_operations;
3928         sb->s_qcop = &f2fs_quotactl_ops;
3929         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3930
3931         if (f2fs_sb_has_quota_ino(sbi)) {
3932                 for (i = 0; i < MAXQUOTAS; i++) {
3933                         if (f2fs_qf_ino(sbi->sb, i))
3934                                 sbi->nquota_files++;
3935                 }
3936         }
3937 #endif
3938
3939         sb->s_op = &f2fs_sops;
3940 #ifdef CONFIG_FS_ENCRYPTION
3941         sb->s_cop = &f2fs_cryptops;
3942 #endif
3943 #ifdef CONFIG_FS_VERITY
3944         sb->s_vop = &f2fs_verityops;
3945 #endif
3946         sb->s_xattr = f2fs_xattr_handlers;
3947         sb->s_export_op = &f2fs_export_ops;
3948         sb->s_magic = F2FS_SUPER_MAGIC;
3949         sb->s_time_gran = 1;
3950         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3951                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3952         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3953         sb->s_iflags |= SB_I_CGROUPWB;
3954
3955         /* init f2fs-specific super block info */
3956         sbi->valid_super_block = valid_super_block;
3957         init_rwsem(&sbi->gc_lock);
3958         mutex_init(&sbi->writepages);
3959         init_rwsem(&sbi->cp_global_sem);
3960         init_rwsem(&sbi->node_write);
3961         init_rwsem(&sbi->node_change);
3962
3963         /* disallow all the data/node/meta page writes */
3964         set_sbi_flag(sbi, SBI_POR_DOING);
3965         spin_lock_init(&sbi->stat_lock);
3966
3967         /* init iostat info */
3968         spin_lock_init(&sbi->iostat_lock);
3969         sbi->iostat_enable = false;
3970         sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
3971
3972         for (i = 0; i < NR_PAGE_TYPE; i++) {
3973                 int n = (i == META) ? 1 : NR_TEMP_TYPE;
3974                 int j;
3975
3976                 sbi->write_io[i] =
3977                         f2fs_kmalloc(sbi,
3978                                      array_size(n,
3979                                                 sizeof(struct f2fs_bio_info)),
3980                                      GFP_KERNEL);
3981                 if (!sbi->write_io[i]) {
3982                         err = -ENOMEM;
3983                         goto free_bio_info;
3984                 }
3985
3986                 for (j = HOT; j < n; j++) {
3987                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
3988                         sbi->write_io[i][j].sbi = sbi;
3989                         sbi->write_io[i][j].bio = NULL;
3990                         spin_lock_init(&sbi->write_io[i][j].io_lock);
3991                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3992                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3993                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3994                 }
3995         }
3996
3997         init_rwsem(&sbi->cp_rwsem);
3998         init_rwsem(&sbi->quota_sem);
3999         init_waitqueue_head(&sbi->cp_wait);
4000         init_sb_info(sbi);
4001
4002         err = init_percpu_info(sbi);
4003         if (err)
4004                 goto free_bio_info;
4005
4006         if (F2FS_IO_ALIGNED(sbi)) {
4007                 sbi->write_io_dummy =
4008                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4009                 if (!sbi->write_io_dummy) {
4010                         err = -ENOMEM;
4011                         goto free_percpu;
4012                 }
4013         }
4014
4015         /* init per sbi slab cache */
4016         err = f2fs_init_xattr_caches(sbi);
4017         if (err)
4018                 goto free_io_dummy;
4019         err = f2fs_init_page_array_cache(sbi);
4020         if (err)
4021                 goto free_xattr_cache;
4022
4023         /* get an inode for meta space */
4024         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4025         if (IS_ERR(sbi->meta_inode)) {
4026                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4027                 err = PTR_ERR(sbi->meta_inode);
4028                 goto free_page_array_cache;
4029         }
4030
4031         err = f2fs_get_valid_checkpoint(sbi);
4032         if (err) {
4033                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4034                 goto free_meta_inode;
4035         }
4036
4037         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4038                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4039         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4040                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4041                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4042         }
4043
4044         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4045                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4046
4047         /* Initialize device list */
4048         err = f2fs_scan_devices(sbi);
4049         if (err) {
4050                 f2fs_err(sbi, "Failed to find devices");
4051                 goto free_devices;
4052         }
4053
4054         err = f2fs_init_post_read_wq(sbi);
4055         if (err) {
4056                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4057                 goto free_devices;
4058         }
4059
4060         sbi->total_valid_node_count =
4061                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4062         percpu_counter_set(&sbi->total_valid_inode_count,
4063                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4064         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4065         sbi->total_valid_block_count =
4066                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4067         sbi->last_valid_block_count = sbi->total_valid_block_count;
4068         sbi->reserved_blocks = 0;
4069         sbi->current_reserved_blocks = 0;
4070         limit_reserve_root(sbi);
4071         adjust_unusable_cap_perc(sbi);
4072
4073         for (i = 0; i < NR_INODE_TYPE; i++) {
4074                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4075                 spin_lock_init(&sbi->inode_lock[i]);
4076         }
4077         mutex_init(&sbi->flush_lock);
4078
4079         f2fs_init_extent_cache_info(sbi);
4080
4081         f2fs_init_ino_entry_info(sbi);
4082
4083         f2fs_init_fsync_node_info(sbi);
4084
4085         /* setup checkpoint request control and start checkpoint issue thread */
4086         f2fs_init_ckpt_req_control(sbi);
4087         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4088                         test_opt(sbi, MERGE_CHECKPOINT)) {
4089                 err = f2fs_start_ckpt_thread(sbi);
4090                 if (err) {
4091                         f2fs_err(sbi,
4092                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4093                             err);
4094                         goto stop_ckpt_thread;
4095                 }
4096         }
4097
4098         /* setup f2fs internal modules */
4099         err = f2fs_build_segment_manager(sbi);
4100         if (err) {
4101                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4102                          err);
4103                 goto free_sm;
4104         }
4105         err = f2fs_build_node_manager(sbi);
4106         if (err) {
4107                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4108                          err);
4109                 goto free_nm;
4110         }
4111
4112         /* For write statistics */
4113         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4114
4115         /* Read accumulated write IO statistics if exists */
4116         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4117         if (__exist_node_summaries(sbi))
4118                 sbi->kbytes_written =
4119                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4120
4121         f2fs_build_gc_manager(sbi);
4122
4123         err = f2fs_build_stats(sbi);
4124         if (err)
4125                 goto free_nm;
4126
4127         /* get an inode for node space */
4128         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4129         if (IS_ERR(sbi->node_inode)) {
4130                 f2fs_err(sbi, "Failed to read node inode");
4131                 err = PTR_ERR(sbi->node_inode);
4132                 goto free_stats;
4133         }
4134
4135         /* read root inode and dentry */
4136         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4137         if (IS_ERR(root)) {
4138                 f2fs_err(sbi, "Failed to read root inode");
4139                 err = PTR_ERR(root);
4140                 goto free_node_inode;
4141         }
4142         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4143                         !root->i_size || !root->i_nlink) {
4144                 iput(root);
4145                 err = -EINVAL;
4146                 goto free_node_inode;
4147         }
4148
4149         sb->s_root = d_make_root(root); /* allocate root dentry */
4150         if (!sb->s_root) {
4151                 err = -ENOMEM;
4152                 goto free_node_inode;
4153         }
4154
4155         err = f2fs_init_compress_inode(sbi);
4156         if (err)
4157                 goto free_root_inode;
4158
4159         err = f2fs_register_sysfs(sbi);
4160         if (err)
4161                 goto free_compress_inode;
4162
4163 #ifdef CONFIG_QUOTA
4164         /* Enable quota usage during mount */
4165         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4166                 err = f2fs_enable_quotas(sb);
4167                 if (err)
4168                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4169         }
4170 #endif
4171         /* if there are any orphan inodes, free them */
4172         err = f2fs_recover_orphan_inodes(sbi);
4173         if (err)
4174                 goto free_meta;
4175
4176         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4177                 goto reset_checkpoint;
4178
4179         /* recover fsynced data */
4180         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4181                         !test_opt(sbi, NORECOVERY)) {
4182                 /*
4183                  * mount should be failed, when device has readonly mode, and
4184                  * previous checkpoint was not done by clean system shutdown.
4185                  */
4186                 if (f2fs_hw_is_readonly(sbi)) {
4187                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4188                                 err = f2fs_recover_fsync_data(sbi, true);
4189                                 if (err > 0) {
4190                                         err = -EROFS;
4191                                         f2fs_err(sbi, "Need to recover fsync data, but "
4192                                                 "write access unavailable, please try "
4193                                                 "mount w/ disable_roll_forward or norecovery");
4194                                 }
4195                                 if (err < 0)
4196                                         goto free_meta;
4197                         }
4198                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4199                         goto reset_checkpoint;
4200                 }
4201
4202                 if (need_fsck)
4203                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4204
4205                 if (skip_recovery)
4206                         goto reset_checkpoint;
4207
4208                 err = f2fs_recover_fsync_data(sbi, false);
4209                 if (err < 0) {
4210                         if (err != -ENOMEM)
4211                                 skip_recovery = true;
4212                         need_fsck = true;
4213                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4214                                  err);
4215                         goto free_meta;
4216                 }
4217         } else {
4218                 err = f2fs_recover_fsync_data(sbi, true);
4219
4220                 if (!f2fs_readonly(sb) && err > 0) {
4221                         err = -EINVAL;
4222                         f2fs_err(sbi, "Need to recover fsync data");
4223                         goto free_meta;
4224                 }
4225         }
4226
4227         /*
4228          * If the f2fs is not readonly and fsync data recovery succeeds,
4229          * check zoned block devices' write pointer consistency.
4230          */
4231         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4232                 err = f2fs_check_write_pointer(sbi);
4233                 if (err)
4234                         goto free_meta;
4235         }
4236
4237 reset_checkpoint:
4238         f2fs_init_inmem_curseg(sbi);
4239
4240         /* f2fs_recover_fsync_data() cleared this already */
4241         clear_sbi_flag(sbi, SBI_POR_DOING);
4242
4243         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4244                 err = f2fs_disable_checkpoint(sbi);
4245                 if (err)
4246                         goto sync_free_meta;
4247         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4248                 f2fs_enable_checkpoint(sbi);
4249         }
4250
4251         /*
4252          * If filesystem is not mounted as read-only then
4253          * do start the gc_thread.
4254          */
4255         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4256                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4257                 /* After POR, we can run background GC thread.*/
4258                 err = f2fs_start_gc_thread(sbi);
4259                 if (err)
4260                         goto sync_free_meta;
4261         }
4262         kvfree(options);
4263
4264         /* recover broken superblock */
4265         if (recovery) {
4266                 err = f2fs_commit_super(sbi, true);
4267                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4268                           sbi->valid_super_block ? 1 : 2, err);
4269         }
4270
4271         f2fs_join_shrinker(sbi);
4272
4273         f2fs_tuning_parameters(sbi);
4274
4275         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4276                     cur_cp_version(F2FS_CKPT(sbi)));
4277         f2fs_update_time(sbi, CP_TIME);
4278         f2fs_update_time(sbi, REQ_TIME);
4279         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4280         return 0;
4281
4282 sync_free_meta:
4283         /* safe to flush all the data */
4284         sync_filesystem(sbi->sb);
4285         retry_cnt = 0;
4286
4287 free_meta:
4288 #ifdef CONFIG_QUOTA
4289         f2fs_truncate_quota_inode_pages(sb);
4290         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4291                 f2fs_quota_off_umount(sbi->sb);
4292 #endif
4293         /*
4294          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4295          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4296          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4297          * falls into an infinite loop in f2fs_sync_meta_pages().
4298          */
4299         truncate_inode_pages_final(META_MAPPING(sbi));
4300         /* evict some inodes being cached by GC */
4301         evict_inodes(sb);
4302         f2fs_unregister_sysfs(sbi);
4303 free_compress_inode:
4304         f2fs_destroy_compress_inode(sbi);
4305 free_root_inode:
4306         dput(sb->s_root);
4307         sb->s_root = NULL;
4308 free_node_inode:
4309         f2fs_release_ino_entry(sbi, true);
4310         truncate_inode_pages_final(NODE_MAPPING(sbi));
4311         iput(sbi->node_inode);
4312         sbi->node_inode = NULL;
4313 free_stats:
4314         f2fs_destroy_stats(sbi);
4315 free_nm:
4316         f2fs_destroy_node_manager(sbi);
4317 free_sm:
4318         f2fs_destroy_segment_manager(sbi);
4319         f2fs_destroy_post_read_wq(sbi);
4320 stop_ckpt_thread:
4321         f2fs_stop_ckpt_thread(sbi);
4322 free_devices:
4323         destroy_device_list(sbi);
4324         kvfree(sbi->ckpt);
4325 free_meta_inode:
4326         make_bad_inode(sbi->meta_inode);
4327         iput(sbi->meta_inode);
4328         sbi->meta_inode = NULL;
4329 free_page_array_cache:
4330         f2fs_destroy_page_array_cache(sbi);
4331 free_xattr_cache:
4332         f2fs_destroy_xattr_caches(sbi);
4333 free_io_dummy:
4334         mempool_destroy(sbi->write_io_dummy);
4335 free_percpu:
4336         destroy_percpu_info(sbi);
4337 free_bio_info:
4338         for (i = 0; i < NR_PAGE_TYPE; i++)
4339                 kvfree(sbi->write_io[i]);
4340
4341 #ifdef CONFIG_UNICODE
4342         utf8_unload(sb->s_encoding);
4343         sb->s_encoding = NULL;
4344 #endif
4345 free_options:
4346 #ifdef CONFIG_QUOTA
4347         for (i = 0; i < MAXQUOTAS; i++)
4348                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4349 #endif
4350         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4351         kvfree(options);
4352 free_sb_buf:
4353         kfree(raw_super);
4354 free_sbi:
4355         if (sbi->s_chksum_driver)
4356                 crypto_free_shash(sbi->s_chksum_driver);
4357         kfree(sbi);
4358
4359         /* give only one another chance */
4360         if (retry_cnt > 0 && skip_recovery) {
4361                 retry_cnt--;
4362                 shrink_dcache_sb(sb);
4363                 goto try_onemore;
4364         }
4365         return err;
4366 }
4367
4368 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4369                         const char *dev_name, void *data)
4370 {
4371         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4372 }
4373
4374 static void kill_f2fs_super(struct super_block *sb)
4375 {
4376         if (sb->s_root) {
4377                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4378
4379                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4380                 f2fs_stop_gc_thread(sbi);
4381                 f2fs_stop_discard_thread(sbi);
4382
4383 #ifdef CONFIG_F2FS_FS_COMPRESSION
4384                 /*
4385                  * latter evict_inode() can bypass checking and invalidating
4386                  * compress inode cache.
4387                  */
4388                 if (test_opt(sbi, COMPRESS_CACHE))
4389                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4390 #endif
4391
4392                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4393                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4394                         struct cp_control cpc = {
4395                                 .reason = CP_UMOUNT,
4396                         };
4397                         f2fs_write_checkpoint(sbi, &cpc);
4398                 }
4399
4400                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4401                         sb->s_flags &= ~SB_RDONLY;
4402         }
4403         kill_block_super(sb);
4404 }
4405
4406 static struct file_system_type f2fs_fs_type = {
4407         .owner          = THIS_MODULE,
4408         .name           = "f2fs",
4409         .mount          = f2fs_mount,
4410         .kill_sb        = kill_f2fs_super,
4411         .fs_flags       = FS_REQUIRES_DEV,
4412 };
4413 MODULE_ALIAS_FS("f2fs");
4414
4415 static int __init init_inodecache(void)
4416 {
4417         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4418                         sizeof(struct f2fs_inode_info), 0,
4419                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4420         if (!f2fs_inode_cachep)
4421                 return -ENOMEM;
4422         return 0;
4423 }
4424
4425 static void destroy_inodecache(void)
4426 {
4427         /*
4428          * Make sure all delayed rcu free inodes are flushed before we
4429          * destroy cache.
4430          */
4431         rcu_barrier();
4432         kmem_cache_destroy(f2fs_inode_cachep);
4433 }
4434
4435 static int __init init_f2fs_fs(void)
4436 {
4437         int err;
4438
4439         if (PAGE_SIZE != F2FS_BLKSIZE) {
4440                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4441                                 PAGE_SIZE, F2FS_BLKSIZE);
4442                 return -EINVAL;
4443         }
4444
4445         err = init_inodecache();
4446         if (err)
4447                 goto fail;
4448         err = f2fs_create_node_manager_caches();
4449         if (err)
4450                 goto free_inodecache;
4451         err = f2fs_create_segment_manager_caches();
4452         if (err)
4453                 goto free_node_manager_caches;
4454         err = f2fs_create_checkpoint_caches();
4455         if (err)
4456                 goto free_segment_manager_caches;
4457         err = f2fs_create_recovery_cache();
4458         if (err)
4459                 goto free_checkpoint_caches;
4460         err = f2fs_create_extent_cache();
4461         if (err)
4462                 goto free_recovery_cache;
4463         err = f2fs_create_garbage_collection_cache();
4464         if (err)
4465                 goto free_extent_cache;
4466         err = f2fs_init_sysfs();
4467         if (err)
4468                 goto free_garbage_collection_cache;
4469         err = register_shrinker(&f2fs_shrinker_info);
4470         if (err)
4471                 goto free_sysfs;
4472         err = register_filesystem(&f2fs_fs_type);
4473         if (err)
4474                 goto free_shrinker;
4475         f2fs_create_root_stats();
4476         err = f2fs_init_post_read_processing();
4477         if (err)
4478                 goto free_root_stats;
4479         err = f2fs_init_bio_entry_cache();
4480         if (err)
4481                 goto free_post_read;
4482         err = f2fs_init_bioset();
4483         if (err)
4484                 goto free_bio_enrty_cache;
4485         err = f2fs_init_compress_mempool();
4486         if (err)
4487                 goto free_bioset;
4488         err = f2fs_init_compress_cache();
4489         if (err)
4490                 goto free_compress_mempool;
4491         err = f2fs_create_casefold_cache();
4492         if (err)
4493                 goto free_compress_cache;
4494         return 0;
4495 free_compress_cache:
4496         f2fs_destroy_compress_cache();
4497 free_compress_mempool:
4498         f2fs_destroy_compress_mempool();
4499 free_bioset:
4500         f2fs_destroy_bioset();
4501 free_bio_enrty_cache:
4502         f2fs_destroy_bio_entry_cache();
4503 free_post_read:
4504         f2fs_destroy_post_read_processing();
4505 free_root_stats:
4506         f2fs_destroy_root_stats();
4507         unregister_filesystem(&f2fs_fs_type);
4508 free_shrinker:
4509         unregister_shrinker(&f2fs_shrinker_info);
4510 free_sysfs:
4511         f2fs_exit_sysfs();
4512 free_garbage_collection_cache:
4513         f2fs_destroy_garbage_collection_cache();
4514 free_extent_cache:
4515         f2fs_destroy_extent_cache();
4516 free_recovery_cache:
4517         f2fs_destroy_recovery_cache();
4518 free_checkpoint_caches:
4519         f2fs_destroy_checkpoint_caches();
4520 free_segment_manager_caches:
4521         f2fs_destroy_segment_manager_caches();
4522 free_node_manager_caches:
4523         f2fs_destroy_node_manager_caches();
4524 free_inodecache:
4525         destroy_inodecache();
4526 fail:
4527         return err;
4528 }
4529
4530 static void __exit exit_f2fs_fs(void)
4531 {
4532         f2fs_destroy_casefold_cache();
4533         f2fs_destroy_compress_cache();
4534         f2fs_destroy_compress_mempool();
4535         f2fs_destroy_bioset();
4536         f2fs_destroy_bio_entry_cache();
4537         f2fs_destroy_post_read_processing();
4538         f2fs_destroy_root_stats();
4539         unregister_filesystem(&f2fs_fs_type);
4540         unregister_shrinker(&f2fs_shrinker_info);
4541         f2fs_exit_sysfs();
4542         f2fs_destroy_garbage_collection_cache();
4543         f2fs_destroy_extent_cache();
4544         f2fs_destroy_recovery_cache();
4545         f2fs_destroy_checkpoint_caches();
4546         f2fs_destroy_segment_manager_caches();
4547         f2fs_destroy_node_manager_caches();
4548         destroy_inodecache();
4549 }
4550
4551 module_init(init_f2fs_fs)
4552 module_exit(exit_f2fs_fs)
4553
4554 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4555 MODULE_DESCRIPTION("Flash Friendly File System");
4556 MODULE_LICENSE("GPL");
4557 MODULE_SOFTDEP("pre: crc32");
4558