fs/f2fs/super.c

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