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/fs_context.h>
  12 #include <linux/sched/mm.h>
  13 #include <linux/statfs.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/kthread.h>
  16 #include <linux/parser.h>
  17 #include <linux/mount.h>
  18 #include <linux/seq_file.h>
  19 #include <linux/proc_fs.h>
  20 #include <linux/random.h>
  21 #include <linux/exportfs.h>
  22 #include <linux/blkdev.h>
  23 #include <linux/quotaops.h>
  24 #include <linux/f2fs_fs.h>
  25 #include <linux/sysfs.h>
  26 #include <linux/quota.h>
  27 #include <linux/unicode.h>
  28 #include <linux/part_stat.h>
  29 #include <linux/zstd.h>
  30 #include <linux/lz4.h>
  31
  32 #include "f2fs.h"
  33 #include "node.h"
  34 #include "segment.h"
  35 #include "xattr.h"
  36 #include "gc.h"
  37 #include "iostat.h"
  38
  39 #define CREATE_TRACE_POINTS
  40 #include <trace/events/f2fs.h>
  41
  42 static struct kmem_cache *f2fs_inode_cachep;
  43
  44 #ifdef CONFIG_F2FS_FAULT_INJECTION
  45
  46 const char *f2fs_fault_name[FAULT_MAX] = {
  47         [FAULT_KMALLOC]                 = "kmalloc",
  48         [FAULT_KVMALLOC]                = "kvmalloc",
  49         [FAULT_PAGE_ALLOC]              = "page alloc",
  50         [FAULT_PAGE_GET]                = "page get",
  51         [FAULT_ALLOC_NID]               = "alloc nid",
  52         [FAULT_ORPHAN]                  = "orphan",
  53         [FAULT_BLOCK]                   = "no more block",
  54         [FAULT_DIR_DEPTH]               = "too big dir depth",
  55         [FAULT_EVICT_INODE]             = "evict_inode fail",
  56         [FAULT_TRUNCATE]                = "truncate fail",
  57         [FAULT_READ_IO]                 = "read IO error",
  58         [FAULT_CHECKPOINT]              = "checkpoint error",
  59         [FAULT_DISCARD]                 = "discard error",
  60         [FAULT_WRITE_IO]                = "write IO error",
  61         [FAULT_SLAB_ALLOC]              = "slab alloc",
  62         [FAULT_DQUOT_INIT]              = "dquot initialize",
  63         [FAULT_LOCK_OP]                 = "lock_op",
  64         [FAULT_BLKADDR_VALIDITY]        = "invalid blkaddr",
  65         [FAULT_BLKADDR_CONSISTENCE]     = "inconsistent blkaddr",
  66         [FAULT_NO_SEGMENT]              = "no free segment",
  67 };
  68
  69 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  70                                                         unsigned int type)
  71 {
  72         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  73
  74         if (rate) {
  75                 atomic_set(&ffi->inject_ops, 0);
  76                 ffi->inject_rate = rate;
  77         }
  78
  79         if (type)
  80                 ffi->inject_type = type;
  81
  82         if (!rate && !type)
  83                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  84 }
  85 #endif
  86
  87 /* f2fs-wide shrinker description */
  88 static struct shrinker *f2fs_shrinker_info;
  89
  90 static int __init f2fs_init_shrinker(void)
  91 {
  92         f2fs_shrinker_info = shrinker_alloc(0, "f2fs-shrinker");
  93         if (!f2fs_shrinker_info)
  94                 return -ENOMEM;
  95
  96         f2fs_shrinker_info->count_objects = f2fs_shrink_count;
  97         f2fs_shrinker_info->scan_objects = f2fs_shrink_scan;
  98
  99         shrinker_register(f2fs_shrinker_info);
 100
 101         return 0;
 102 }
 103
 104 static void f2fs_exit_shrinker(void)
 105 {
 106         shrinker_free(f2fs_shrinker_info);
 107 }
 108
 109 enum {
 110         Opt_gc_background,
 111         Opt_disable_roll_forward,
 112         Opt_norecovery,
 113         Opt_discard,
 114         Opt_nodiscard,
 115         Opt_noheap,
 116         Opt_heap,
 117         Opt_user_xattr,
 118         Opt_nouser_xattr,
 119         Opt_acl,
 120         Opt_noacl,
 121         Opt_active_logs,
 122         Opt_disable_ext_identify,
 123         Opt_inline_xattr,
 124         Opt_noinline_xattr,
 125         Opt_inline_xattr_size,
 126         Opt_inline_data,
 127         Opt_inline_dentry,
 128         Opt_noinline_dentry,
 129         Opt_flush_merge,
 130         Opt_noflush_merge,
 131         Opt_barrier,
 132         Opt_nobarrier,
 133         Opt_fastboot,
 134         Opt_extent_cache,
 135         Opt_noextent_cache,
 136         Opt_noinline_data,
 137         Opt_data_flush,
 138         Opt_reserve_root,
 139         Opt_resgid,
 140         Opt_resuid,
 141         Opt_mode,
 142         Opt_fault_injection,
 143         Opt_fault_type,
 144         Opt_lazytime,
 145         Opt_nolazytime,
 146         Opt_quota,
 147         Opt_noquota,
 148         Opt_usrquota,
 149         Opt_grpquota,
 150         Opt_prjquota,
 151         Opt_usrjquota,
 152         Opt_grpjquota,
 153         Opt_prjjquota,
 154         Opt_offusrjquota,
 155         Opt_offgrpjquota,
 156         Opt_offprjjquota,
 157         Opt_jqfmt_vfsold,
 158         Opt_jqfmt_vfsv0,
 159         Opt_jqfmt_vfsv1,
 160         Opt_alloc,
 161         Opt_fsync,
 162         Opt_test_dummy_encryption,
 163         Opt_inlinecrypt,
 164         Opt_checkpoint_disable,
 165         Opt_checkpoint_disable_cap,
 166         Opt_checkpoint_disable_cap_perc,
 167         Opt_checkpoint_enable,
 168         Opt_checkpoint_merge,
 169         Opt_nocheckpoint_merge,
 170         Opt_compress_algorithm,
 171         Opt_compress_log_size,
 172         Opt_compress_extension,
 173         Opt_nocompress_extension,
 174         Opt_compress_chksum,
 175         Opt_compress_mode,
 176         Opt_compress_cache,
 177         Opt_atgc,
 178         Opt_gc_merge,
 179         Opt_nogc_merge,
 180         Opt_discard_unit,
 181         Opt_memory_mode,
 182         Opt_age_extent_cache,
 183         Opt_errors,
 184         Opt_err,
 185 };
 186
 187 static match_table_t f2fs_tokens = {
 188         {Opt_gc_background, "background_gc=%s"},
 189         {Opt_disable_roll_forward, "disable_roll_forward"},
 190         {Opt_norecovery, "norecovery"},
 191         {Opt_discard, "discard"},
 192         {Opt_nodiscard, "nodiscard"},
 193         {Opt_noheap, "no_heap"},
 194         {Opt_heap, "heap"},
 195         {Opt_user_xattr, "user_xattr"},
 196         {Opt_nouser_xattr, "nouser_xattr"},
 197         {Opt_acl, "acl"},
 198         {Opt_noacl, "noacl"},
 199         {Opt_active_logs, "active_logs=%u"},
 200         {Opt_disable_ext_identify, "disable_ext_identify"},
 201         {Opt_inline_xattr, "inline_xattr"},
 202         {Opt_noinline_xattr, "noinline_xattr"},
 203         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 204         {Opt_inline_data, "inline_data"},
 205         {Opt_inline_dentry, "inline_dentry"},
 206         {Opt_noinline_dentry, "noinline_dentry"},
 207         {Opt_flush_merge, "flush_merge"},
 208         {Opt_noflush_merge, "noflush_merge"},
 209         {Opt_barrier, "barrier"},
 210         {Opt_nobarrier, "nobarrier"},
 211         {Opt_fastboot, "fastboot"},
 212         {Opt_extent_cache, "extent_cache"},
 213         {Opt_noextent_cache, "noextent_cache"},
 214         {Opt_noinline_data, "noinline_data"},
 215         {Opt_data_flush, "data_flush"},
 216         {Opt_reserve_root, "reserve_root=%u"},
 217         {Opt_resgid, "resgid=%u"},
 218         {Opt_resuid, "resuid=%u"},
 219         {Opt_mode, "mode=%s"},
 220         {Opt_fault_injection, "fault_injection=%u"},
 221         {Opt_fault_type, "fault_type=%u"},
 222         {Opt_lazytime, "lazytime"},
 223         {Opt_nolazytime, "nolazytime"},
 224         {Opt_quota, "quota"},
 225         {Opt_noquota, "noquota"},
 226         {Opt_usrquota, "usrquota"},
 227         {Opt_grpquota, "grpquota"},
 228         {Opt_prjquota, "prjquota"},
 229         {Opt_usrjquota, "usrjquota=%s"},
 230         {Opt_grpjquota, "grpjquota=%s"},
 231         {Opt_prjjquota, "prjjquota=%s"},
 232         {Opt_offusrjquota, "usrjquota="},
 233         {Opt_offgrpjquota, "grpjquota="},
 234         {Opt_offprjjquota, "prjjquota="},
 235         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 236         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 237         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 238         {Opt_alloc, "alloc_mode=%s"},
 239         {Opt_fsync, "fsync_mode=%s"},
 240         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 241         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 242         {Opt_inlinecrypt, "inlinecrypt"},
 243         {Opt_checkpoint_disable, "checkpoint=disable"},
 244         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 245         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 246         {Opt_checkpoint_enable, "checkpoint=enable"},
 247         {Opt_checkpoint_merge, "checkpoint_merge"},
 248         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 249         {Opt_compress_algorithm, "compress_algorithm=%s"},
 250         {Opt_compress_log_size, "compress_log_size=%u"},
 251         {Opt_compress_extension, "compress_extension=%s"},
 252         {Opt_nocompress_extension, "nocompress_extension=%s"},
 253         {Opt_compress_chksum, "compress_chksum"},
 254         {Opt_compress_mode, "compress_mode=%s"},
 255         {Opt_compress_cache, "compress_cache"},
 256         {Opt_atgc, "atgc"},
 257         {Opt_gc_merge, "gc_merge"},
 258         {Opt_nogc_merge, "nogc_merge"},
 259         {Opt_discard_unit, "discard_unit=%s"},
 260         {Opt_memory_mode, "memory=%s"},
 261         {Opt_age_extent_cache, "age_extent_cache"},
 262         {Opt_errors, "errors=%s"},
 263         {Opt_err, NULL},
 264 };
 265
 266 void f2fs_printk(struct f2fs_sb_info *sbi, bool limit_rate,
 267                                                 const char *fmt, ...)
 268 {
 269         struct va_format vaf;
 270         va_list args;
 271         int level;
 272
 273         va_start(args, fmt);
 274
 275         level = printk_get_level(fmt);
 276         vaf.fmt = printk_skip_level(fmt);
 277         vaf.va = &args;
 278         if (limit_rate)
 279                 printk_ratelimited("%c%cF2FS-fs (%s): %pV\n",
 280                         KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 281         else
 282                 printk("%c%cF2FS-fs (%s): %pV\n",
 283                         KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 284
 285         va_end(args);
 286 }
 287
 288 #if IS_ENABLED(CONFIG_UNICODE)
 289 static const struct f2fs_sb_encodings {
 290         __u16 magic;
 291         char *name;
 292         unsigned int version;
 293 } f2fs_sb_encoding_map[] = {
 294         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 295 };
 296
 297 static const struct f2fs_sb_encodings *
 298 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 299 {
 300         __u16 magic = le16_to_cpu(sb->s_encoding);
 301         int i;
 302
 303         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 304                 if (magic == f2fs_sb_encoding_map[i].magic)
 305                         return &f2fs_sb_encoding_map[i];
 306
 307         return NULL;
 308 }
 309
 310 struct kmem_cache *f2fs_cf_name_slab;
 311 static int __init f2fs_create_casefold_cache(void)
 312 {
 313         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 314                                                         F2FS_NAME_LEN);
 315         return f2fs_cf_name_slab ? 0 : -ENOMEM;
 316 }
 317
 318 static void f2fs_destroy_casefold_cache(void)
 319 {
 320         kmem_cache_destroy(f2fs_cf_name_slab);
 321 }
 322 #else
 323 static int __init f2fs_create_casefold_cache(void) { return 0; }
 324 static void f2fs_destroy_casefold_cache(void) { }
 325 #endif
 326
 327 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 328 {
 329         block_t limit = min((sbi->user_block_count >> 3),
 330                         sbi->user_block_count - sbi->reserved_blocks);
 331
 332         /* limit is 12.5% */
 333         if (test_opt(sbi, RESERVE_ROOT) &&
 334                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 335                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 336                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 337                           F2FS_OPTION(sbi).root_reserved_blocks);
 338         }
 339         if (!test_opt(sbi, RESERVE_ROOT) &&
 340                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 341                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 342                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 343                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 344                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 345                           from_kuid_munged(&init_user_ns,
 346                                            F2FS_OPTION(sbi).s_resuid),
 347                           from_kgid_munged(&init_user_ns,
 348                                            F2FS_OPTION(sbi).s_resgid));
 349 }
 350
 351 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 352 {
 353         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 354                 return;
 355
 356         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 357                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 358         else
 359                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 360                                         F2FS_OPTION(sbi).unusable_cap_perc;
 361
 362         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 363                         F2FS_OPTION(sbi).unusable_cap,
 364                         F2FS_OPTION(sbi).unusable_cap_perc);
 365 }
 366
 367 static void init_once(void *foo)
 368 {
 369         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 370
 371         inode_init_once(&fi->vfs_inode);
 372 }
 373
 374 #ifdef CONFIG_QUOTA
 375 static const char * const quotatypes[] = INITQFNAMES;
 376 #define QTYPE2NAME(t) (quotatypes[t])
 377 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 378                                                         substring_t *args)
 379 {
 380         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 381         char *qname;
 382         int ret = -EINVAL;
 383
 384         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 385                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 386                 return -EINVAL;
 387         }
 388         if (f2fs_sb_has_quota_ino(sbi)) {
 389                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 390                 return 0;
 391         }
 392
 393         qname = match_strdup(args);
 394         if (!qname) {
 395                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 396                 return -ENOMEM;
 397         }
 398         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 399                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 400                         ret = 0;
 401                 else
 402                         f2fs_err(sbi, "%s quota file already specified",
 403                                  QTYPE2NAME(qtype));
 404                 goto errout;
 405         }
 406         if (strchr(qname, '/')) {
 407                 f2fs_err(sbi, "quotafile must be on filesystem root");
 408                 goto errout;
 409         }
 410         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 411         set_opt(sbi, QUOTA);
 412         return 0;
 413 errout:
 414         kfree(qname);
 415         return ret;
 416 }
 417
 418 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 419 {
 420         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 421
 422         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 423                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 424                 return -EINVAL;
 425         }
 426         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 427         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 428         return 0;
 429 }
 430
 431 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 432 {
 433         /*
 434          * We do the test below only for project quotas. 'usrquota' and
 435          * 'grpquota' mount options are allowed even without quota feature
 436          * to support legacy quotas in quota files.
 437          */
 438         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 439                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 440                 return -1;
 441         }
 442         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 443                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 444                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 445                 if (test_opt(sbi, USRQUOTA) &&
 446                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 447                         clear_opt(sbi, USRQUOTA);
 448
 449                 if (test_opt(sbi, GRPQUOTA) &&
 450                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 451                         clear_opt(sbi, GRPQUOTA);
 452
 453                 if (test_opt(sbi, PRJQUOTA) &&
 454                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 455                         clear_opt(sbi, PRJQUOTA);
 456
 457                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 458                                 test_opt(sbi, PRJQUOTA)) {
 459                         f2fs_err(sbi, "old and new quota format mixing");
 460                         return -1;
 461                 }
 462
 463                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 464                         f2fs_err(sbi, "journaled quota format not specified");
 465                         return -1;
 466                 }
 467         }
 468
 469         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 470                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 471                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 472         }
 473         return 0;
 474 }
 475 #endif
 476
 477 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 478                                           const char *opt,
 479                                           const substring_t *arg,
 480                                           bool is_remount)
 481 {
 482         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 483         struct fs_parameter param = {
 484                 .type = fs_value_is_string,
 485                 .string = arg->from ? arg->from : "",
 486         };
 487         struct fscrypt_dummy_policy *policy =
 488                 &F2FS_OPTION(sbi).dummy_enc_policy;
 489         int err;
 490
 491         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 492                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 493                 return -EINVAL;
 494         }
 495
 496         if (!f2fs_sb_has_encrypt(sbi)) {
 497                 f2fs_err(sbi, "Encrypt feature is off");
 498                 return -EINVAL;
 499         }
 500
 501         /*
 502          * This mount option is just for testing, and it's not worthwhile to
 503          * implement the extra complexity (e.g. RCU protection) that would be
 504          * needed to allow it to be set or changed during remount.  We do allow
 505          * it to be specified during remount, but only if there is no change.
 506          */
 507         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 508                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 509                 return -EINVAL;
 510         }
 511
 512         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 513         if (err) {
 514                 if (err == -EEXIST)
 515                         f2fs_warn(sbi,
 516                                   "Can't change test_dummy_encryption on remount");
 517                 else if (err == -EINVAL)
 518                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 519                                   opt);
 520                 else
 521                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 522                                   opt, err);
 523                 return -EINVAL;
 524         }
 525         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 526         return 0;
 527 }
 528
 529 #ifdef CONFIG_F2FS_FS_COMPRESSION
 530 static bool is_compress_extension_exist(struct f2fs_sb_info *sbi,
 531                                         const char *new_ext, bool is_ext)
 532 {
 533         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 534         int ext_cnt;
 535         int i;
 536
 537         if (is_ext) {
 538                 ext = F2FS_OPTION(sbi).extensions;
 539                 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 540         } else {
 541                 ext = F2FS_OPTION(sbi).noextensions;
 542                 ext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 543         }
 544
 545         for (i = 0; i < ext_cnt; i++) {
 546                 if (!strcasecmp(new_ext, ext[i]))
 547                         return true;
 548         }
 549
 550         return false;
 551 }
 552
 553 /*
 554  * 1. The same extension name cannot not appear in both compress and non-compress extension
 555  * at the same time.
 556  * 2. If the compress extension specifies all files, the types specified by the non-compress
 557  * extension will be treated as special cases and will not be compressed.
 558  * 3. Don't allow the non-compress extension specifies all files.
 559  */
 560 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 561 {
 562         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 563         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 564         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 565
 566         ext = F2FS_OPTION(sbi).extensions;
 567         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 568         noext = F2FS_OPTION(sbi).noextensions;
 569         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 570
 571         if (!noext_cnt)
 572                 return 0;
 573
 574         for (no_index = 0; no_index < noext_cnt; no_index++) {
 575                 if (!strcasecmp("*", noext[no_index])) {
 576                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 577                         return -EINVAL;
 578                 }
 579                 for (index = 0; index < ext_cnt; index++) {
 580                         if (!strcasecmp(ext[index], noext[no_index])) {
 581                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 582                                                 ext[index]);
 583                                 return -EINVAL;
 584                         }
 585                 }
 586         }
 587         return 0;
 588 }
 589
 590 #ifdef CONFIG_F2FS_FS_LZ4
 591 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 592 {
 593 #ifdef CONFIG_F2FS_FS_LZ4HC
 594         unsigned int level;
 595
 596         if (strlen(str) == 3) {
 597                 F2FS_OPTION(sbi).compress_level = 0;
 598                 return 0;
 599         }
 600
 601         str += 3;
 602
 603         if (str[0] != ':') {
 604                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 605                 return -EINVAL;
 606         }
 607         if (kstrtouint(str + 1, 10, &level))
 608                 return -EINVAL;
 609
 610         if (!f2fs_is_compress_level_valid(COMPRESS_LZ4, level)) {
 611                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 612                 return -EINVAL;
 613         }
 614
 615         F2FS_OPTION(sbi).compress_level = level;
 616         return 0;
 617 #else
 618         if (strlen(str) == 3) {
 619                 F2FS_OPTION(sbi).compress_level = 0;
 620                 return 0;
 621         }
 622         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 623         return -EINVAL;
 624 #endif
 625 }
 626 #endif
 627
 628 #ifdef CONFIG_F2FS_FS_ZSTD
 629 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 630 {
 631         int level;
 632         int len = 4;
 633
 634         if (strlen(str) == len) {
 635                 F2FS_OPTION(sbi).compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
 636                 return 0;
 637         }
 638
 639         str += len;
 640
 641         if (str[0] != ':') {
 642                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 643                 return -EINVAL;
 644         }
 645         if (kstrtoint(str + 1, 10, &level))
 646                 return -EINVAL;
 647
 648         /* f2fs does not support negative compress level now */
 649         if (level < 0) {
 650                 f2fs_info(sbi, "do not support negative compress level: %d", level);
 651                 return -ERANGE;
 652         }
 653
 654         if (!f2fs_is_compress_level_valid(COMPRESS_ZSTD, level)) {
 655                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 656                 return -EINVAL;
 657         }
 658
 659         F2FS_OPTION(sbi).compress_level = level;
 660         return 0;
 661 }
 662 #endif
 663 #endif
 664
 665 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 666 {
 667         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 668         substring_t args[MAX_OPT_ARGS];
 669 #ifdef CONFIG_F2FS_FS_COMPRESSION
 670         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 671         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 672         int ext_cnt, noext_cnt;
 673 #endif
 674         char *p, *name;
 675         int arg = 0;
 676         kuid_t uid;
 677         kgid_t gid;
 678         int ret;
 679
 680         if (!options)
 681                 goto default_check;
 682
 683         while ((p = strsep(&options, ",")) != NULL) {
 684                 int token;
 685
 686                 if (!*p)
 687                         continue;
 688                 /*
 689                  * Initialize args struct so we know whether arg was
 690                  * found; some options take optional arguments.
 691                  */
 692                 args[0].to = args[0].from = NULL;
 693                 token = match_token(p, f2fs_tokens, args);
 694
 695                 switch (token) {
 696                 case Opt_gc_background:
 697                         name = match_strdup(&args[0]);
 698
 699                         if (!name)
 700                                 return -ENOMEM;
 701                         if (!strcmp(name, "on")) {
 702                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 703                         } else if (!strcmp(name, "off")) {
 704                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 705                         } else if (!strcmp(name, "sync")) {
 706                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 707                         } else {
 708                                 kfree(name);
 709                                 return -EINVAL;
 710                         }
 711                         kfree(name);
 712                         break;
 713                 case Opt_disable_roll_forward:
 714                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 715                         break;
 716                 case Opt_norecovery:
 717                         /* this option mounts f2fs with ro */
 718                         set_opt(sbi, NORECOVERY);
 719                         if (!f2fs_readonly(sb))
 720                                 return -EINVAL;
 721                         break;
 722                 case Opt_discard:
 723                         if (!f2fs_hw_support_discard(sbi)) {
 724                                 f2fs_warn(sbi, "device does not support discard");
 725                                 break;
 726                         }
 727                         set_opt(sbi, DISCARD);
 728                         break;
 729                 case Opt_nodiscard:
 730                         if (f2fs_hw_should_discard(sbi)) {
 731                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 732                                 return -EINVAL;
 733                         }
 734                         clear_opt(sbi, DISCARD);
 735                         break;
 736                 case Opt_noheap:
 737                 case Opt_heap:
 738                         f2fs_warn(sbi, "heap/no_heap options were deprecated");
 739                         break;
 740 #ifdef CONFIG_F2FS_FS_XATTR
 741                 case Opt_user_xattr:
 742                         set_opt(sbi, XATTR_USER);
 743                         break;
 744                 case Opt_nouser_xattr:
 745                         clear_opt(sbi, XATTR_USER);
 746                         break;
 747                 case Opt_inline_xattr:
 748                         set_opt(sbi, INLINE_XATTR);
 749                         break;
 750                 case Opt_noinline_xattr:
 751                         clear_opt(sbi, INLINE_XATTR);
 752                         break;
 753                 case Opt_inline_xattr_size:
 754                         if (args->from && match_int(args, &arg))
 755                                 return -EINVAL;
 756                         set_opt(sbi, INLINE_XATTR_SIZE);
 757                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 758                         break;
 759 #else
 760                 case Opt_user_xattr:
 761                         f2fs_info(sbi, "user_xattr options not supported");
 762                         break;
 763                 case Opt_nouser_xattr:
 764                         f2fs_info(sbi, "nouser_xattr options not supported");
 765                         break;
 766                 case Opt_inline_xattr:
 767                         f2fs_info(sbi, "inline_xattr options not supported");
 768                         break;
 769                 case Opt_noinline_xattr:
 770                         f2fs_info(sbi, "noinline_xattr options not supported");
 771                         break;
 772 #endif
 773 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 774                 case Opt_acl:
 775                         set_opt(sbi, POSIX_ACL);
 776                         break;
 777                 case Opt_noacl:
 778                         clear_opt(sbi, POSIX_ACL);
 779                         break;
 780 #else
 781                 case Opt_acl:
 782                         f2fs_info(sbi, "acl options not supported");
 783                         break;
 784                 case Opt_noacl:
 785                         f2fs_info(sbi, "noacl options not supported");
 786                         break;
 787 #endif
 788                 case Opt_active_logs:
 789                         if (args->from && match_int(args, &arg))
 790                                 return -EINVAL;
 791                         if (arg != 2 && arg != 4 &&
 792                                 arg != NR_CURSEG_PERSIST_TYPE)
 793                                 return -EINVAL;
 794                         F2FS_OPTION(sbi).active_logs = arg;
 795                         break;
 796                 case Opt_disable_ext_identify:
 797                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 798                         break;
 799                 case Opt_inline_data:
 800                         set_opt(sbi, INLINE_DATA);
 801                         break;
 802                 case Opt_inline_dentry:
 803                         set_opt(sbi, INLINE_DENTRY);
 804                         break;
 805                 case Opt_noinline_dentry:
 806                         clear_opt(sbi, INLINE_DENTRY);
 807                         break;
 808                 case Opt_flush_merge:
 809                         set_opt(sbi, FLUSH_MERGE);
 810                         break;
 811                 case Opt_noflush_merge:
 812                         clear_opt(sbi, FLUSH_MERGE);
 813                         break;
 814                 case Opt_nobarrier:
 815                         set_opt(sbi, NOBARRIER);
 816                         break;
 817                 case Opt_barrier:
 818                         clear_opt(sbi, NOBARRIER);
 819                         break;
 820                 case Opt_fastboot:
 821                         set_opt(sbi, FASTBOOT);
 822                         break;
 823                 case Opt_extent_cache:
 824                         set_opt(sbi, READ_EXTENT_CACHE);
 825                         break;
 826                 case Opt_noextent_cache:
 827                         clear_opt(sbi, READ_EXTENT_CACHE);
 828                         break;
 829                 case Opt_noinline_data:
 830                         clear_opt(sbi, INLINE_DATA);
 831                         break;
 832                 case Opt_data_flush:
 833                         set_opt(sbi, DATA_FLUSH);
 834                         break;
 835                 case Opt_reserve_root:
 836                         if (args->from && match_int(args, &arg))
 837                                 return -EINVAL;
 838                         if (test_opt(sbi, RESERVE_ROOT)) {
 839                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 840                                           F2FS_OPTION(sbi).root_reserved_blocks);
 841                         } else {
 842                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 843                                 set_opt(sbi, RESERVE_ROOT);
 844                         }
 845                         break;
 846                 case Opt_resuid:
 847                         if (args->from && match_int(args, &arg))
 848                                 return -EINVAL;
 849                         uid = make_kuid(current_user_ns(), arg);
 850                         if (!uid_valid(uid)) {
 851                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 852                                 return -EINVAL;
 853                         }
 854                         F2FS_OPTION(sbi).s_resuid = uid;
 855                         break;
 856                 case Opt_resgid:
 857                         if (args->from && match_int(args, &arg))
 858                                 return -EINVAL;
 859                         gid = make_kgid(current_user_ns(), arg);
 860                         if (!gid_valid(gid)) {
 861                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 862                                 return -EINVAL;
 863                         }
 864                         F2FS_OPTION(sbi).s_resgid = gid;
 865                         break;
 866                 case Opt_mode:
 867                         name = match_strdup(&args[0]);
 868
 869                         if (!name)
 870                                 return -ENOMEM;
 871                         if (!strcmp(name, "adaptive")) {
 872                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 873                         } else if (!strcmp(name, "lfs")) {
 874                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 875                         } else if (!strcmp(name, "fragment:segment")) {
 876                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 877                         } else if (!strcmp(name, "fragment:block")) {
 878                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 879                         } else {
 880                                 kfree(name);
 881                                 return -EINVAL;
 882                         }
 883                         kfree(name);
 884                         break;
 885 #ifdef CONFIG_F2FS_FAULT_INJECTION
 886                 case Opt_fault_injection:
 887                         if (args->from && match_int(args, &arg))
 888                                 return -EINVAL;
 889                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 890                         set_opt(sbi, FAULT_INJECTION);
 891                         break;
 892
 893                 case Opt_fault_type:
 894                         if (args->from && match_int(args, &arg))
 895                                 return -EINVAL;
 896                         f2fs_build_fault_attr(sbi, 0, arg);
 897                         set_opt(sbi, FAULT_INJECTION);
 898                         break;
 899 #else
 900                 case Opt_fault_injection:
 901                         f2fs_info(sbi, "fault_injection options not supported");
 902                         break;
 903
 904                 case Opt_fault_type:
 905                         f2fs_info(sbi, "fault_type options not supported");
 906                         break;
 907 #endif
 908                 case Opt_lazytime:
 909                         sb->s_flags |= SB_LAZYTIME;
 910                         break;
 911                 case Opt_nolazytime:
 912                         sb->s_flags &= ~SB_LAZYTIME;
 913                         break;
 914 #ifdef CONFIG_QUOTA
 915                 case Opt_quota:
 916                 case Opt_usrquota:
 917                         set_opt(sbi, USRQUOTA);
 918                         break;
 919                 case Opt_grpquota:
 920                         set_opt(sbi, GRPQUOTA);
 921                         break;
 922                 case Opt_prjquota:
 923                         set_opt(sbi, PRJQUOTA);
 924                         break;
 925                 case Opt_usrjquota:
 926                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 927                         if (ret)
 928                                 return ret;
 929                         break;
 930                 case Opt_grpjquota:
 931                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 932                         if (ret)
 933                                 return ret;
 934                         break;
 935                 case Opt_prjjquota:
 936                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 937                         if (ret)
 938                                 return ret;
 939                         break;
 940                 case Opt_offusrjquota:
 941                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 942                         if (ret)
 943                                 return ret;
 944                         break;
 945                 case Opt_offgrpjquota:
 946                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 947                         if (ret)
 948                                 return ret;
 949                         break;
 950                 case Opt_offprjjquota:
 951                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 952                         if (ret)
 953                                 return ret;
 954                         break;
 955                 case Opt_jqfmt_vfsold:
 956                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 957                         break;
 958                 case Opt_jqfmt_vfsv0:
 959                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 960                         break;
 961                 case Opt_jqfmt_vfsv1:
 962                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 963                         break;
 964                 case Opt_noquota:
 965                         clear_opt(sbi, QUOTA);
 966                         clear_opt(sbi, USRQUOTA);
 967                         clear_opt(sbi, GRPQUOTA);
 968                         clear_opt(sbi, PRJQUOTA);
 969                         break;
 970 #else
 971                 case Opt_quota:
 972                 case Opt_usrquota:
 973                 case Opt_grpquota:
 974                 case Opt_prjquota:
 975                 case Opt_usrjquota:
 976                 case Opt_grpjquota:
 977                 case Opt_prjjquota:
 978                 case Opt_offusrjquota:
 979                 case Opt_offgrpjquota:
 980                 case Opt_offprjjquota:
 981                 case Opt_jqfmt_vfsold:
 982                 case Opt_jqfmt_vfsv0:
 983                 case Opt_jqfmt_vfsv1:
 984                 case Opt_noquota:
 985                         f2fs_info(sbi, "quota operations not supported");
 986                         break;
 987 #endif
 988                 case Opt_alloc:
 989                         name = match_strdup(&args[0]);
 990                         if (!name)
 991                                 return -ENOMEM;
 992
 993                         if (!strcmp(name, "default")) {
 994                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 995                         } else if (!strcmp(name, "reuse")) {
 996                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 997                         } else {
 998                                 kfree(name);
 999                                 return -EINVAL;
1000                         }
1001                         kfree(name);
1002                         break;
1003                 case Opt_fsync:
1004                         name = match_strdup(&args[0]);
1005                         if (!name)
1006                                 return -ENOMEM;
1007                         if (!strcmp(name, "posix")) {
1008                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1009                         } else if (!strcmp(name, "strict")) {
1010                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1011                         } else if (!strcmp(name, "nobarrier")) {
1012                                 F2FS_OPTION(sbi).fsync_mode =
1013                                                         FSYNC_MODE_NOBARRIER;
1014                         } else {
1015                                 kfree(name);
1016                                 return -EINVAL;
1017                         }
1018                         kfree(name);
1019                         break;
1020                 case Opt_test_dummy_encryption:
1021                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1022                                                              is_remount);
1023                         if (ret)
1024                                 return ret;
1025                         break;
1026                 case Opt_inlinecrypt:
1027 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1028                         sb->s_flags |= SB_INLINECRYPT;
1029 #else
1030                         f2fs_info(sbi, "inline encryption not supported");
1031 #endif
1032                         break;
1033                 case Opt_checkpoint_disable_cap_perc:
1034                         if (args->from && match_int(args, &arg))
1035                                 return -EINVAL;
1036                         if (arg < 0 || arg > 100)
1037                                 return -EINVAL;
1038                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1039                         set_opt(sbi, DISABLE_CHECKPOINT);
1040                         break;
1041                 case Opt_checkpoint_disable_cap:
1042                         if (args->from && match_int(args, &arg))
1043                                 return -EINVAL;
1044                         F2FS_OPTION(sbi).unusable_cap = arg;
1045                         set_opt(sbi, DISABLE_CHECKPOINT);
1046                         break;
1047                 case Opt_checkpoint_disable:
1048                         set_opt(sbi, DISABLE_CHECKPOINT);
1049                         break;
1050                 case Opt_checkpoint_enable:
1051                         clear_opt(sbi, DISABLE_CHECKPOINT);
1052                         break;
1053                 case Opt_checkpoint_merge:
1054                         set_opt(sbi, MERGE_CHECKPOINT);
1055                         break;
1056                 case Opt_nocheckpoint_merge:
1057                         clear_opt(sbi, MERGE_CHECKPOINT);
1058                         break;
1059 #ifdef CONFIG_F2FS_FS_COMPRESSION
1060                 case Opt_compress_algorithm:
1061                         if (!f2fs_sb_has_compression(sbi)) {
1062                                 f2fs_info(sbi, "Image doesn't support compression");
1063                                 break;
1064                         }
1065                         name = match_strdup(&args[0]);
1066                         if (!name)
1067                                 return -ENOMEM;
1068                         if (!strcmp(name, "lzo")) {
1069 #ifdef CONFIG_F2FS_FS_LZO
1070                                 F2FS_OPTION(sbi).compress_level = 0;
1071                                 F2FS_OPTION(sbi).compress_algorithm =
1072                                                                 COMPRESS_LZO;
1073 #else
1074                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1075 #endif
1076                         } else if (!strncmp(name, "lz4", 3)) {
1077 #ifdef CONFIG_F2FS_FS_LZ4
1078                                 ret = f2fs_set_lz4hc_level(sbi, name);
1079                                 if (ret) {
1080                                         kfree(name);
1081                                         return -EINVAL;
1082                                 }
1083                                 F2FS_OPTION(sbi).compress_algorithm =
1084                                                                 COMPRESS_LZ4;
1085 #else
1086                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1087 #endif
1088                         } else if (!strncmp(name, "zstd", 4)) {
1089 #ifdef CONFIG_F2FS_FS_ZSTD
1090                                 ret = f2fs_set_zstd_level(sbi, name);
1091                                 if (ret) {
1092                                         kfree(name);
1093                                         return -EINVAL;
1094                                 }
1095                                 F2FS_OPTION(sbi).compress_algorithm =
1096                                                                 COMPRESS_ZSTD;
1097 #else
1098                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1099 #endif
1100                         } else if (!strcmp(name, "lzo-rle")) {
1101 #ifdef CONFIG_F2FS_FS_LZORLE
1102                                 F2FS_OPTION(sbi).compress_level = 0;
1103                                 F2FS_OPTION(sbi).compress_algorithm =
1104                                                                 COMPRESS_LZORLE;
1105 #else
1106                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1107 #endif
1108                         } else {
1109                                 kfree(name);
1110                                 return -EINVAL;
1111                         }
1112                         kfree(name);
1113                         break;
1114                 case Opt_compress_log_size:
1115                         if (!f2fs_sb_has_compression(sbi)) {
1116                                 f2fs_info(sbi, "Image doesn't support compression");
1117                                 break;
1118                         }
1119                         if (args->from && match_int(args, &arg))
1120                                 return -EINVAL;
1121                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1122                                 arg > MAX_COMPRESS_LOG_SIZE) {
1123                                 f2fs_err(sbi,
1124                                         "Compress cluster log size is out of range");
1125                                 return -EINVAL;
1126                         }
1127                         F2FS_OPTION(sbi).compress_log_size = arg;
1128                         break;
1129                 case Opt_compress_extension:
1130                         if (!f2fs_sb_has_compression(sbi)) {
1131                                 f2fs_info(sbi, "Image doesn't support compression");
1132                                 break;
1133                         }
1134                         name = match_strdup(&args[0]);
1135                         if (!name)
1136                                 return -ENOMEM;
1137
1138                         ext = F2FS_OPTION(sbi).extensions;
1139                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1140
1141                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1142                                 ext_cnt >= COMPRESS_EXT_NUM) {
1143                                 f2fs_err(sbi,
1144                                         "invalid extension length/number");
1145                                 kfree(name);
1146                                 return -EINVAL;
1147                         }
1148
1149                         if (is_compress_extension_exist(sbi, name, true)) {
1150                                 kfree(name);
1151                                 break;
1152                         }
1153
1154                         strcpy(ext[ext_cnt], name);
1155                         F2FS_OPTION(sbi).compress_ext_cnt++;
1156                         kfree(name);
1157                         break;
1158                 case Opt_nocompress_extension:
1159                         if (!f2fs_sb_has_compression(sbi)) {
1160                                 f2fs_info(sbi, "Image doesn't support compression");
1161                                 break;
1162                         }
1163                         name = match_strdup(&args[0]);
1164                         if (!name)
1165                                 return -ENOMEM;
1166
1167                         noext = F2FS_OPTION(sbi).noextensions;
1168                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1169
1170                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1171                                 noext_cnt >= COMPRESS_EXT_NUM) {
1172                                 f2fs_err(sbi,
1173                                         "invalid extension length/number");
1174                                 kfree(name);
1175                                 return -EINVAL;
1176                         }
1177
1178                         if (is_compress_extension_exist(sbi, name, false)) {
1179                                 kfree(name);
1180                                 break;
1181                         }
1182
1183                         strcpy(noext[noext_cnt], name);
1184                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1185                         kfree(name);
1186                         break;
1187                 case Opt_compress_chksum:
1188                         if (!f2fs_sb_has_compression(sbi)) {
1189                                 f2fs_info(sbi, "Image doesn't support compression");
1190                                 break;
1191                         }
1192                         F2FS_OPTION(sbi).compress_chksum = true;
1193                         break;
1194                 case Opt_compress_mode:
1195                         if (!f2fs_sb_has_compression(sbi)) {
1196                                 f2fs_info(sbi, "Image doesn't support compression");
1197                                 break;
1198                         }
1199                         name = match_strdup(&args[0]);
1200                         if (!name)
1201                                 return -ENOMEM;
1202                         if (!strcmp(name, "fs")) {
1203                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1204                         } else if (!strcmp(name, "user")) {
1205                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1206                         } else {
1207                                 kfree(name);
1208                                 return -EINVAL;
1209                         }
1210                         kfree(name);
1211                         break;
1212                 case Opt_compress_cache:
1213                         if (!f2fs_sb_has_compression(sbi)) {
1214                                 f2fs_info(sbi, "Image doesn't support compression");
1215                                 break;
1216                         }
1217                         set_opt(sbi, COMPRESS_CACHE);
1218                         break;
1219 #else
1220                 case Opt_compress_algorithm:
1221                 case Opt_compress_log_size:
1222                 case Opt_compress_extension:
1223                 case Opt_nocompress_extension:
1224                 case Opt_compress_chksum:
1225                 case Opt_compress_mode:
1226                 case Opt_compress_cache:
1227                         f2fs_info(sbi, "compression options not supported");
1228                         break;
1229 #endif
1230                 case Opt_atgc:
1231                         set_opt(sbi, ATGC);
1232                         break;
1233                 case Opt_gc_merge:
1234                         set_opt(sbi, GC_MERGE);
1235                         break;
1236                 case Opt_nogc_merge:
1237                         clear_opt(sbi, GC_MERGE);
1238                         break;
1239                 case Opt_discard_unit:
1240                         name = match_strdup(&args[0]);
1241                         if (!name)
1242                                 return -ENOMEM;
1243                         if (!strcmp(name, "block")) {
1244                                 F2FS_OPTION(sbi).discard_unit =
1245                                                 DISCARD_UNIT_BLOCK;
1246                         } else if (!strcmp(name, "segment")) {
1247                                 F2FS_OPTION(sbi).discard_unit =
1248                                                 DISCARD_UNIT_SEGMENT;
1249                         } else if (!strcmp(name, "section")) {
1250                                 F2FS_OPTION(sbi).discard_unit =
1251                                                 DISCARD_UNIT_SECTION;
1252                         } else {
1253                                 kfree(name);
1254                                 return -EINVAL;
1255                         }
1256                         kfree(name);
1257                         break;
1258                 case Opt_memory_mode:
1259                         name = match_strdup(&args[0]);
1260                         if (!name)
1261                                 return -ENOMEM;
1262                         if (!strcmp(name, "normal")) {
1263                                 F2FS_OPTION(sbi).memory_mode =
1264                                                 MEMORY_MODE_NORMAL;
1265                         } else if (!strcmp(name, "low")) {
1266                                 F2FS_OPTION(sbi).memory_mode =
1267                                                 MEMORY_MODE_LOW;
1268                         } else {
1269                                 kfree(name);
1270                                 return -EINVAL;
1271                         }
1272                         kfree(name);
1273                         break;
1274                 case Opt_age_extent_cache:
1275                         set_opt(sbi, AGE_EXTENT_CACHE);
1276                         break;
1277                 case Opt_errors:
1278                         name = match_strdup(&args[0]);
1279                         if (!name)
1280                                 return -ENOMEM;
1281                         if (!strcmp(name, "remount-ro")) {
1282                                 F2FS_OPTION(sbi).errors =
1283                                                 MOUNT_ERRORS_READONLY;
1284                         } else if (!strcmp(name, "continue")) {
1285                                 F2FS_OPTION(sbi).errors =
1286                                                 MOUNT_ERRORS_CONTINUE;
1287                         } else if (!strcmp(name, "panic")) {
1288                                 F2FS_OPTION(sbi).errors =
1289                                                 MOUNT_ERRORS_PANIC;
1290                         } else {
1291                                 kfree(name);
1292                                 return -EINVAL;
1293                         }
1294                         kfree(name);
1295                         break;
1296                 default:
1297                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1298                                  p);
1299                         return -EINVAL;
1300                 }
1301         }
1302 default_check:
1303 #ifdef CONFIG_QUOTA
1304         if (f2fs_check_quota_options(sbi))
1305                 return -EINVAL;
1306 #else
1307         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1308                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1309                 return -EINVAL;
1310         }
1311         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1312                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1313                 return -EINVAL;
1314         }
1315 #endif
1316 #if !IS_ENABLED(CONFIG_UNICODE)
1317         if (f2fs_sb_has_casefold(sbi)) {
1318                 f2fs_err(sbi,
1319                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1320                 return -EINVAL;
1321         }
1322 #endif
1323         /*
1324          * The BLKZONED feature indicates that the drive was formatted with
1325          * zone alignment optimization. This is optional for host-aware
1326          * devices, but mandatory for host-managed zoned block devices.
1327          */
1328         if (f2fs_sb_has_blkzoned(sbi)) {
1329 #ifdef CONFIG_BLK_DEV_ZONED
1330                 if (F2FS_OPTION(sbi).discard_unit !=
1331                                                 DISCARD_UNIT_SECTION) {
1332                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1333                         F2FS_OPTION(sbi).discard_unit =
1334                                         DISCARD_UNIT_SECTION;
1335                 }
1336
1337                 if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) {
1338                         f2fs_info(sbi, "Only lfs mode is allowed with zoned block device feature");
1339                         return -EINVAL;
1340                 }
1341 #else
1342                 f2fs_err(sbi, "Zoned block device support is not enabled");
1343                 return -EINVAL;
1344 #endif
1345         }
1346
1347 #ifdef CONFIG_F2FS_FS_COMPRESSION
1348         if (f2fs_test_compress_extension(sbi)) {
1349                 f2fs_err(sbi, "invalid compress or nocompress extension");
1350                 return -EINVAL;
1351         }
1352 #endif
1353
1354         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1355                 int min_size, max_size;
1356
1357                 if (!f2fs_sb_has_extra_attr(sbi) ||
1358                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1359                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1360                         return -EINVAL;
1361                 }
1362                 if (!test_opt(sbi, INLINE_XATTR)) {
1363                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1364                         return -EINVAL;
1365                 }
1366
1367                 min_size = MIN_INLINE_XATTR_SIZE;
1368                 max_size = MAX_INLINE_XATTR_SIZE;
1369
1370                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1371                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1372                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1373                                  min_size, max_size);
1374                         return -EINVAL;
1375                 }
1376         }
1377
1378         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1379                 f2fs_err(sbi, "LFS is not compatible with ATGC");
1380                 return -EINVAL;
1381         }
1382
1383         if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1384                 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1385                 return -EINVAL;
1386         }
1387
1388         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1389                 f2fs_err(sbi, "Allow to mount readonly mode only");
1390                 return -EROFS;
1391         }
1392         return 0;
1393 }
1394
1395 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1396 {
1397         struct f2fs_inode_info *fi;
1398
1399         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC))
1400                 return NULL;
1401
1402         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1403         if (!fi)
1404                 return NULL;
1405
1406         init_once((void *) fi);
1407
1408         /* Initialize f2fs-specific inode info */
1409         atomic_set(&fi->dirty_pages, 0);
1410         atomic_set(&fi->i_compr_blocks, 0);
1411         init_f2fs_rwsem(&fi->i_sem);
1412         spin_lock_init(&fi->i_size_lock);
1413         INIT_LIST_HEAD(&fi->dirty_list);
1414         INIT_LIST_HEAD(&fi->gdirty_list);
1415         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1416         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1417         init_f2fs_rwsem(&fi->i_xattr_sem);
1418
1419         /* Will be used by directory only */
1420         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1421
1422         return &fi->vfs_inode;
1423 }
1424
1425 static int f2fs_drop_inode(struct inode *inode)
1426 {
1427         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1428         int ret;
1429
1430         /*
1431          * during filesystem shutdown, if checkpoint is disabled,
1432          * drop useless meta/node dirty pages.
1433          */
1434         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1435                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1436                         inode->i_ino == F2FS_META_INO(sbi)) {
1437                         trace_f2fs_drop_inode(inode, 1);
1438                         return 1;
1439                 }
1440         }
1441
1442         /*
1443          * This is to avoid a deadlock condition like below.
1444          * writeback_single_inode(inode)
1445          *  - f2fs_write_data_page
1446          *    - f2fs_gc -> iput -> evict
1447          *       - inode_wait_for_writeback(inode)
1448          */
1449         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1450                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1451                         /* to avoid evict_inode call simultaneously */
1452                         atomic_inc(&inode->i_count);
1453                         spin_unlock(&inode->i_lock);
1454
1455                         /* should remain fi->extent_tree for writepage */
1456                         f2fs_destroy_extent_node(inode);
1457
1458                         sb_start_intwrite(inode->i_sb);
1459                         f2fs_i_size_write(inode, 0);
1460
1461                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1462                                         inode, NULL, 0, DATA);
1463                         truncate_inode_pages_final(inode->i_mapping);
1464
1465                         if (F2FS_HAS_BLOCKS(inode))
1466                                 f2fs_truncate(inode);
1467
1468                         sb_end_intwrite(inode->i_sb);
1469
1470                         spin_lock(&inode->i_lock);
1471                         atomic_dec(&inode->i_count);
1472                 }
1473                 trace_f2fs_drop_inode(inode, 0);
1474                 return 0;
1475         }
1476         ret = generic_drop_inode(inode);
1477         if (!ret)
1478                 ret = fscrypt_drop_inode(inode);
1479         trace_f2fs_drop_inode(inode, ret);
1480         return ret;
1481 }
1482
1483 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1484 {
1485         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1486         int ret = 0;
1487
1488         spin_lock(&sbi->inode_lock[DIRTY_META]);
1489         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1490                 ret = 1;
1491         } else {
1492                 set_inode_flag(inode, FI_DIRTY_INODE);
1493                 stat_inc_dirty_inode(sbi, DIRTY_META);
1494         }
1495         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1496                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1497                                 &sbi->inode_list[DIRTY_META]);
1498                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1499         }
1500         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1501         return ret;
1502 }
1503
1504 void f2fs_inode_synced(struct inode *inode)
1505 {
1506         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1507
1508         spin_lock(&sbi->inode_lock[DIRTY_META]);
1509         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1510                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1511                 return;
1512         }
1513         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1514                 list_del_init(&F2FS_I(inode)->gdirty_list);
1515                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1516         }
1517         clear_inode_flag(inode, FI_DIRTY_INODE);
1518         clear_inode_flag(inode, FI_AUTO_RECOVER);
1519         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1520         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1521 }
1522
1523 /*
1524  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1525  *
1526  * We should call set_dirty_inode to write the dirty inode through write_inode.
1527  */
1528 static void f2fs_dirty_inode(struct inode *inode, int flags)
1529 {
1530         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1531
1532         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1533                         inode->i_ino == F2FS_META_INO(sbi))
1534                 return;
1535
1536         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1537                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1538
1539         f2fs_inode_dirtied(inode, false);
1540 }
1541
1542 static void f2fs_free_inode(struct inode *inode)
1543 {
1544         fscrypt_free_inode(inode);
1545         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1546 }
1547
1548 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1549 {
1550         percpu_counter_destroy(&sbi->total_valid_inode_count);
1551         percpu_counter_destroy(&sbi->rf_node_block_count);
1552         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1553 }
1554
1555 static void destroy_device_list(struct f2fs_sb_info *sbi)
1556 {
1557         int i;
1558
1559         for (i = 0; i < sbi->s_ndevs; i++) {
1560                 if (i > 0)
1561                         fput(FDEV(i).bdev_file);
1562 #ifdef CONFIG_BLK_DEV_ZONED
1563                 kvfree(FDEV(i).blkz_seq);
1564 #endif
1565         }
1566         kvfree(sbi->devs);
1567 }
1568
1569 static void f2fs_put_super(struct super_block *sb)
1570 {
1571         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1572         int i;
1573         int err = 0;
1574         bool done;
1575
1576         /* unregister procfs/sysfs entries in advance to avoid race case */
1577         f2fs_unregister_sysfs(sbi);
1578
1579         f2fs_quota_off_umount(sb);
1580
1581         /* prevent remaining shrinker jobs */
1582         mutex_lock(&sbi->umount_mutex);
1583
1584         /*
1585          * flush all issued checkpoints and stop checkpoint issue thread.
1586          * after then, all checkpoints should be done by each process context.
1587          */
1588         f2fs_stop_ckpt_thread(sbi);
1589
1590         /*
1591          * We don't need to do checkpoint when superblock is clean.
1592          * But, the previous checkpoint was not done by umount, it needs to do
1593          * clean checkpoint again.
1594          */
1595         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1596                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1597                 struct cp_control cpc = {
1598                         .reason = CP_UMOUNT,
1599                 };
1600                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1601                 err = f2fs_write_checkpoint(sbi, &cpc);
1602         }
1603
1604         /* be sure to wait for any on-going discard commands */
1605         done = f2fs_issue_discard_timeout(sbi);
1606         if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && done) {
1607                 struct cp_control cpc = {
1608                         .reason = CP_UMOUNT | CP_TRIMMED,
1609                 };
1610                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1611                 err = f2fs_write_checkpoint(sbi, &cpc);
1612         }
1613
1614         /*
1615          * normally superblock is clean, so we need to release this.
1616          * In addition, EIO will skip do checkpoint, we need this as well.
1617          */
1618         f2fs_release_ino_entry(sbi, true);
1619
1620         f2fs_leave_shrinker(sbi);
1621         mutex_unlock(&sbi->umount_mutex);
1622
1623         /* our cp_error case, we can wait for any writeback page */
1624         f2fs_flush_merged_writes(sbi);
1625
1626         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1627
1628         if (err || f2fs_cp_error(sbi)) {
1629                 truncate_inode_pages_final(NODE_MAPPING(sbi));
1630                 truncate_inode_pages_final(META_MAPPING(sbi));
1631         }
1632
1633         for (i = 0; i < NR_COUNT_TYPE; i++) {
1634                 if (!get_pages(sbi, i))
1635                         continue;
1636                 f2fs_err(sbi, "detect filesystem reference count leak during "
1637                         "umount, type: %d, count: %lld", i, get_pages(sbi, i));
1638                 f2fs_bug_on(sbi, 1);
1639         }
1640
1641         f2fs_bug_on(sbi, sbi->fsync_node_num);
1642
1643         f2fs_destroy_compress_inode(sbi);
1644
1645         iput(sbi->node_inode);
1646         sbi->node_inode = NULL;
1647
1648         iput(sbi->meta_inode);
1649         sbi->meta_inode = NULL;
1650
1651         /*
1652          * iput() can update stat information, if f2fs_write_checkpoint()
1653          * above failed with error.
1654          */
1655         f2fs_destroy_stats(sbi);
1656
1657         /* destroy f2fs internal modules */
1658         f2fs_destroy_node_manager(sbi);
1659         f2fs_destroy_segment_manager(sbi);
1660
1661         /* flush s_error_work before sbi destroy */
1662         flush_work(&sbi->s_error_work);
1663
1664         f2fs_destroy_post_read_wq(sbi);
1665
1666         kvfree(sbi->ckpt);
1667
1668         if (sbi->s_chksum_driver)
1669                 crypto_free_shash(sbi->s_chksum_driver);
1670         kfree(sbi->raw_super);
1671
1672         f2fs_destroy_page_array_cache(sbi);
1673         f2fs_destroy_xattr_caches(sbi);
1674 #ifdef CONFIG_QUOTA
1675         for (i = 0; i < MAXQUOTAS; i++)
1676                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1677 #endif
1678         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1679         destroy_percpu_info(sbi);
1680         f2fs_destroy_iostat(sbi);
1681         for (i = 0; i < NR_PAGE_TYPE; i++)
1682                 kvfree(sbi->write_io[i]);
1683 #if IS_ENABLED(CONFIG_UNICODE)
1684         utf8_unload(sb->s_encoding);
1685 #endif
1686 }
1687
1688 int f2fs_sync_fs(struct super_block *sb, int sync)
1689 {
1690         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1691         int err = 0;
1692
1693         if (unlikely(f2fs_cp_error(sbi)))
1694                 return 0;
1695         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1696                 return 0;
1697
1698         trace_f2fs_sync_fs(sb, sync);
1699
1700         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1701                 return -EAGAIN;
1702
1703         if (sync) {
1704                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1705                 err = f2fs_issue_checkpoint(sbi);
1706         }
1707
1708         return err;
1709 }
1710
1711 static int f2fs_freeze(struct super_block *sb)
1712 {
1713         if (f2fs_readonly(sb))
1714                 return 0;
1715
1716         /* IO error happened before */
1717         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1718                 return -EIO;
1719
1720         /* must be clean, since sync_filesystem() was already called */
1721         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1722                 return -EINVAL;
1723
1724         /* Let's flush checkpoints and stop the thread. */
1725         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1726
1727         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1728         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1729         return 0;
1730 }
1731
1732 static int f2fs_unfreeze(struct super_block *sb)
1733 {
1734         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1735         return 0;
1736 }
1737
1738 #ifdef CONFIG_QUOTA
1739 static int f2fs_statfs_project(struct super_block *sb,
1740                                 kprojid_t projid, struct kstatfs *buf)
1741 {
1742         struct kqid qid;
1743         struct dquot *dquot;
1744         u64 limit;
1745         u64 curblock;
1746
1747         qid = make_kqid_projid(projid);
1748         dquot = dqget(sb, qid);
1749         if (IS_ERR(dquot))
1750                 return PTR_ERR(dquot);
1751         spin_lock(&dquot->dq_dqb_lock);
1752
1753         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1754                                         dquot->dq_dqb.dqb_bhardlimit);
1755         if (limit)
1756                 limit >>= sb->s_blocksize_bits;
1757
1758         if (limit && buf->f_blocks > limit) {
1759                 curblock = (dquot->dq_dqb.dqb_curspace +
1760                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1761                 buf->f_blocks = limit;
1762                 buf->f_bfree = buf->f_bavail =
1763                         (buf->f_blocks > curblock) ?
1764                          (buf->f_blocks - curblock) : 0;
1765         }
1766
1767         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1768                                         dquot->dq_dqb.dqb_ihardlimit);
1769
1770         if (limit && buf->f_files > limit) {
1771                 buf->f_files = limit;
1772                 buf->f_ffree =
1773                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1774                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1775         }
1776
1777         spin_unlock(&dquot->dq_dqb_lock);
1778         dqput(dquot);
1779         return 0;
1780 }
1781 #endif
1782
1783 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1784 {
1785         struct super_block *sb = dentry->d_sb;
1786         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1787         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1788         block_t total_count, user_block_count, start_count;
1789         u64 avail_node_count;
1790         unsigned int total_valid_node_count;
1791
1792         total_count = le64_to_cpu(sbi->raw_super->block_count);
1793         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1794         buf->f_type = F2FS_SUPER_MAGIC;
1795         buf->f_bsize = sbi->blocksize;
1796
1797         buf->f_blocks = total_count - start_count;
1798
1799         spin_lock(&sbi->stat_lock);
1800
1801         user_block_count = sbi->user_block_count;
1802         total_valid_node_count = valid_node_count(sbi);
1803         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1804         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1805                                                 sbi->current_reserved_blocks;
1806
1807         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1808                 buf->f_bfree = 0;
1809         else
1810                 buf->f_bfree -= sbi->unusable_block_count;
1811         spin_unlock(&sbi->stat_lock);
1812
1813         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1814                 buf->f_bavail = buf->f_bfree -
1815                                 F2FS_OPTION(sbi).root_reserved_blocks;
1816         else
1817                 buf->f_bavail = 0;
1818
1819         if (avail_node_count > user_block_count) {
1820                 buf->f_files = user_block_count;
1821                 buf->f_ffree = buf->f_bavail;
1822         } else {
1823                 buf->f_files = avail_node_count;
1824                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1825                                         buf->f_bavail);
1826         }
1827
1828         buf->f_namelen = F2FS_NAME_LEN;
1829         buf->f_fsid    = u64_to_fsid(id);
1830
1831 #ifdef CONFIG_QUOTA
1832         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1833                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1834                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1835         }
1836 #endif
1837         return 0;
1838 }
1839
1840 static inline void f2fs_show_quota_options(struct seq_file *seq,
1841                                            struct super_block *sb)
1842 {
1843 #ifdef CONFIG_QUOTA
1844         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1845
1846         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1847                 char *fmtname = "";
1848
1849                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1850                 case QFMT_VFS_OLD:
1851                         fmtname = "vfsold";
1852                         break;
1853                 case QFMT_VFS_V0:
1854                         fmtname = "vfsv0";
1855                         break;
1856                 case QFMT_VFS_V1:
1857                         fmtname = "vfsv1";
1858                         break;
1859                 }
1860                 seq_printf(seq, ",jqfmt=%s", fmtname);
1861         }
1862
1863         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1864                 seq_show_option(seq, "usrjquota",
1865                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1866
1867         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1868                 seq_show_option(seq, "grpjquota",
1869                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1870
1871         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1872                 seq_show_option(seq, "prjjquota",
1873                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1874 #endif
1875 }
1876
1877 #ifdef CONFIG_F2FS_FS_COMPRESSION
1878 static inline void f2fs_show_compress_options(struct seq_file *seq,
1879                                                         struct super_block *sb)
1880 {
1881         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1882         char *algtype = "";
1883         int i;
1884
1885         if (!f2fs_sb_has_compression(sbi))
1886                 return;
1887
1888         switch (F2FS_OPTION(sbi).compress_algorithm) {
1889         case COMPRESS_LZO:
1890                 algtype = "lzo";
1891                 break;
1892         case COMPRESS_LZ4:
1893                 algtype = "lz4";
1894                 break;
1895         case COMPRESS_ZSTD:
1896                 algtype = "zstd";
1897                 break;
1898         case COMPRESS_LZORLE:
1899                 algtype = "lzo-rle";
1900                 break;
1901         }
1902         seq_printf(seq, ",compress_algorithm=%s", algtype);
1903
1904         if (F2FS_OPTION(sbi).compress_level)
1905                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1906
1907         seq_printf(seq, ",compress_log_size=%u",
1908                         F2FS_OPTION(sbi).compress_log_size);
1909
1910         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1911                 seq_printf(seq, ",compress_extension=%s",
1912                         F2FS_OPTION(sbi).extensions[i]);
1913         }
1914
1915         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1916                 seq_printf(seq, ",nocompress_extension=%s",
1917                         F2FS_OPTION(sbi).noextensions[i]);
1918         }
1919
1920         if (F2FS_OPTION(sbi).compress_chksum)
1921                 seq_puts(seq, ",compress_chksum");
1922
1923         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1924                 seq_printf(seq, ",compress_mode=%s", "fs");
1925         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1926                 seq_printf(seq, ",compress_mode=%s", "user");
1927
1928         if (test_opt(sbi, COMPRESS_CACHE))
1929                 seq_puts(seq, ",compress_cache");
1930 }
1931 #endif
1932
1933 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1934 {
1935         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1936
1937         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1938                 seq_printf(seq, ",background_gc=%s", "sync");
1939         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1940                 seq_printf(seq, ",background_gc=%s", "on");
1941         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1942                 seq_printf(seq, ",background_gc=%s", "off");
1943
1944         if (test_opt(sbi, GC_MERGE))
1945                 seq_puts(seq, ",gc_merge");
1946         else
1947                 seq_puts(seq, ",nogc_merge");
1948
1949         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1950                 seq_puts(seq, ",disable_roll_forward");
1951         if (test_opt(sbi, NORECOVERY))
1952                 seq_puts(seq, ",norecovery");
1953         if (test_opt(sbi, DISCARD)) {
1954                 seq_puts(seq, ",discard");
1955                 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
1956                         seq_printf(seq, ",discard_unit=%s", "block");
1957                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
1958                         seq_printf(seq, ",discard_unit=%s", "segment");
1959                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
1960                         seq_printf(seq, ",discard_unit=%s", "section");
1961         } else {
1962                 seq_puts(seq, ",nodiscard");
1963         }
1964 #ifdef CONFIG_F2FS_FS_XATTR
1965         if (test_opt(sbi, XATTR_USER))
1966                 seq_puts(seq, ",user_xattr");
1967         else
1968                 seq_puts(seq, ",nouser_xattr");
1969         if (test_opt(sbi, INLINE_XATTR))
1970                 seq_puts(seq, ",inline_xattr");
1971         else
1972                 seq_puts(seq, ",noinline_xattr");
1973         if (test_opt(sbi, INLINE_XATTR_SIZE))
1974                 seq_printf(seq, ",inline_xattr_size=%u",
1975                                         F2FS_OPTION(sbi).inline_xattr_size);
1976 #endif
1977 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1978         if (test_opt(sbi, POSIX_ACL))
1979                 seq_puts(seq, ",acl");
1980         else
1981                 seq_puts(seq, ",noacl");
1982 #endif
1983         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1984                 seq_puts(seq, ",disable_ext_identify");
1985         if (test_opt(sbi, INLINE_DATA))
1986                 seq_puts(seq, ",inline_data");
1987         else
1988                 seq_puts(seq, ",noinline_data");
1989         if (test_opt(sbi, INLINE_DENTRY))
1990                 seq_puts(seq, ",inline_dentry");
1991         else
1992                 seq_puts(seq, ",noinline_dentry");
1993         if (test_opt(sbi, FLUSH_MERGE))
1994                 seq_puts(seq, ",flush_merge");
1995         else
1996                 seq_puts(seq, ",noflush_merge");
1997         if (test_opt(sbi, NOBARRIER))
1998                 seq_puts(seq, ",nobarrier");
1999         else
2000                 seq_puts(seq, ",barrier");
2001         if (test_opt(sbi, FASTBOOT))
2002                 seq_puts(seq, ",fastboot");
2003         if (test_opt(sbi, READ_EXTENT_CACHE))
2004                 seq_puts(seq, ",extent_cache");
2005         else
2006                 seq_puts(seq, ",noextent_cache");
2007         if (test_opt(sbi, AGE_EXTENT_CACHE))
2008                 seq_puts(seq, ",age_extent_cache");
2009         if (test_opt(sbi, DATA_FLUSH))
2010                 seq_puts(seq, ",data_flush");
2011
2012         seq_puts(seq, ",mode=");
2013         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
2014                 seq_puts(seq, "adaptive");
2015         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
2016                 seq_puts(seq, "lfs");
2017         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
2018                 seq_puts(seq, "fragment:segment");
2019         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2020                 seq_puts(seq, "fragment:block");
2021         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
2022         if (test_opt(sbi, RESERVE_ROOT))
2023                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
2024                                 F2FS_OPTION(sbi).root_reserved_blocks,
2025                                 from_kuid_munged(&init_user_ns,
2026                                         F2FS_OPTION(sbi).s_resuid),
2027                                 from_kgid_munged(&init_user_ns,
2028                                         F2FS_OPTION(sbi).s_resgid));
2029 #ifdef CONFIG_F2FS_FAULT_INJECTION
2030         if (test_opt(sbi, FAULT_INJECTION)) {
2031                 seq_printf(seq, ",fault_injection=%u",
2032                                 F2FS_OPTION(sbi).fault_info.inject_rate);
2033                 seq_printf(seq, ",fault_type=%u",
2034                                 F2FS_OPTION(sbi).fault_info.inject_type);
2035         }
2036 #endif
2037 #ifdef CONFIG_QUOTA
2038         if (test_opt(sbi, QUOTA))
2039                 seq_puts(seq, ",quota");
2040         if (test_opt(sbi, USRQUOTA))
2041                 seq_puts(seq, ",usrquota");
2042         if (test_opt(sbi, GRPQUOTA))
2043                 seq_puts(seq, ",grpquota");
2044         if (test_opt(sbi, PRJQUOTA))
2045                 seq_puts(seq, ",prjquota");
2046 #endif
2047         f2fs_show_quota_options(seq, sbi->sb);
2048
2049         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2050
2051         if (sbi->sb->s_flags & SB_INLINECRYPT)
2052                 seq_puts(seq, ",inlinecrypt");
2053
2054         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2055                 seq_printf(seq, ",alloc_mode=%s", "default");
2056         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2057                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2058
2059         if (test_opt(sbi, DISABLE_CHECKPOINT))
2060                 seq_printf(seq, ",checkpoint=disable:%u",
2061                                 F2FS_OPTION(sbi).unusable_cap);
2062         if (test_opt(sbi, MERGE_CHECKPOINT))
2063                 seq_puts(seq, ",checkpoint_merge");
2064         else
2065                 seq_puts(seq, ",nocheckpoint_merge");
2066         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2067                 seq_printf(seq, ",fsync_mode=%s", "posix");
2068         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2069                 seq_printf(seq, ",fsync_mode=%s", "strict");
2070         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2071                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2072
2073 #ifdef CONFIG_F2FS_FS_COMPRESSION
2074         f2fs_show_compress_options(seq, sbi->sb);
2075 #endif
2076
2077         if (test_opt(sbi, ATGC))
2078                 seq_puts(seq, ",atgc");
2079
2080         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2081                 seq_printf(seq, ",memory=%s", "normal");
2082         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2083                 seq_printf(seq, ",memory=%s", "low");
2084
2085         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
2086                 seq_printf(seq, ",errors=%s", "remount-ro");
2087         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
2088                 seq_printf(seq, ",errors=%s", "continue");
2089         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
2090                 seq_printf(seq, ",errors=%s", "panic");
2091
2092         return 0;
2093 }
2094
2095 static void default_options(struct f2fs_sb_info *sbi, bool remount)
2096 {
2097         /* init some FS parameters */
2098         if (!remount) {
2099                 set_opt(sbi, READ_EXTENT_CACHE);
2100                 clear_opt(sbi, DISABLE_CHECKPOINT);
2101
2102                 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2103                         set_opt(sbi, DISCARD);
2104
2105                 if (f2fs_sb_has_blkzoned(sbi))
2106                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2107                 else
2108                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2109         }
2110
2111         if (f2fs_sb_has_readonly(sbi))
2112                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2113         else
2114                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2115
2116         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2117         if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2118                                                         SMALL_VOLUME_SEGMENTS)
2119                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2120         else
2121                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2122         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2123         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2124         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2125         if (f2fs_sb_has_compression(sbi)) {
2126                 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2127                 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2128                 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2129                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2130         }
2131         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2132         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2133         F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
2134
2135         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2136
2137         set_opt(sbi, INLINE_XATTR);
2138         set_opt(sbi, INLINE_DATA);
2139         set_opt(sbi, INLINE_DENTRY);
2140         set_opt(sbi, MERGE_CHECKPOINT);
2141         F2FS_OPTION(sbi).unusable_cap = 0;
2142         sbi->sb->s_flags |= SB_LAZYTIME;
2143         if (!f2fs_is_readonly(sbi))
2144                 set_opt(sbi, FLUSH_MERGE);
2145         if (f2fs_sb_has_blkzoned(sbi))
2146                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2147         else
2148                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2149
2150 #ifdef CONFIG_F2FS_FS_XATTR
2151         set_opt(sbi, XATTR_USER);
2152 #endif
2153 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2154         set_opt(sbi, POSIX_ACL);
2155 #endif
2156
2157         f2fs_build_fault_attr(sbi, 0, 0);
2158 }
2159
2160 #ifdef CONFIG_QUOTA
2161 static int f2fs_enable_quotas(struct super_block *sb);
2162 #endif
2163
2164 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2165 {
2166         unsigned int s_flags = sbi->sb->s_flags;
2167         struct cp_control cpc;
2168         unsigned int gc_mode = sbi->gc_mode;
2169         int err = 0;
2170         int ret;
2171         block_t unusable;
2172
2173         if (s_flags & SB_RDONLY) {
2174                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2175                 return -EINVAL;
2176         }
2177         sbi->sb->s_flags |= SB_ACTIVE;
2178
2179         /* check if we need more GC first */
2180         unusable = f2fs_get_unusable_blocks(sbi);
2181         if (!f2fs_disable_cp_again(sbi, unusable))
2182                 goto skip_gc;
2183
2184         f2fs_update_time(sbi, DISABLE_TIME);
2185
2186         sbi->gc_mode = GC_URGENT_HIGH;
2187
2188         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2189                 struct f2fs_gc_control gc_control = {
2190                         .victim_segno = NULL_SEGNO,
2191                         .init_gc_type = FG_GC,
2192                         .should_migrate_blocks = false,
2193                         .err_gc_skipped = true,
2194                         .no_bg_gc = true,
2195                         .nr_free_secs = 1 };
2196
2197                 f2fs_down_write(&sbi->gc_lock);
2198                 stat_inc_gc_call_count(sbi, FOREGROUND);
2199                 err = f2fs_gc(sbi, &gc_control);
2200                 if (err == -ENODATA) {
2201                         err = 0;
2202                         break;
2203                 }
2204                 if (err && err != -EAGAIN)
2205                         break;
2206         }
2207
2208         ret = sync_filesystem(sbi->sb);
2209         if (ret || err) {
2210                 err = ret ? ret : err;
2211                 goto restore_flag;
2212         }
2213
2214         unusable = f2fs_get_unusable_blocks(sbi);
2215         if (f2fs_disable_cp_again(sbi, unusable)) {
2216                 err = -EAGAIN;
2217                 goto restore_flag;
2218         }
2219
2220 skip_gc:
2221         f2fs_down_write(&sbi->gc_lock);
2222         cpc.reason = CP_PAUSE;
2223         set_sbi_flag(sbi, SBI_CP_DISABLED);
2224         stat_inc_cp_call_count(sbi, TOTAL_CALL);
2225         err = f2fs_write_checkpoint(sbi, &cpc);
2226         if (err)
2227                 goto out_unlock;
2228
2229         spin_lock(&sbi->stat_lock);
2230         sbi->unusable_block_count = unusable;
2231         spin_unlock(&sbi->stat_lock);
2232
2233 out_unlock:
2234         f2fs_up_write(&sbi->gc_lock);
2235 restore_flag:
2236         sbi->gc_mode = gc_mode;
2237         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2238         return err;
2239 }
2240
2241 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2242 {
2243         int retry = DEFAULT_RETRY_IO_COUNT;
2244
2245         /* we should flush all the data to keep data consistency */
2246         do {
2247                 sync_inodes_sb(sbi->sb);
2248                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2249         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2250
2251         if (unlikely(retry < 0))
2252                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2253
2254         f2fs_down_write(&sbi->gc_lock);
2255         f2fs_dirty_to_prefree(sbi);
2256
2257         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2258         set_sbi_flag(sbi, SBI_IS_DIRTY);
2259         f2fs_up_write(&sbi->gc_lock);
2260
2261         f2fs_sync_fs(sbi->sb, 1);
2262
2263         /* Let's ensure there's no pending checkpoint anymore */
2264         f2fs_flush_ckpt_thread(sbi);
2265 }
2266
2267 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2268 {
2269         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2270         struct f2fs_mount_info org_mount_opt;
2271         unsigned long old_sb_flags;
2272         int err;
2273         bool need_restart_gc = false, need_stop_gc = false;
2274         bool need_restart_flush = false, need_stop_flush = false;
2275         bool need_restart_discard = false, need_stop_discard = false;
2276         bool need_enable_checkpoint = false, need_disable_checkpoint = false;
2277         bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2278         bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2279         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2280         bool no_atgc = !test_opt(sbi, ATGC);
2281         bool no_discard = !test_opt(sbi, DISCARD);
2282         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2283         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2284 #ifdef CONFIG_QUOTA
2285         int i, j;
2286 #endif
2287
2288         /*
2289          * Save the old mount options in case we
2290          * need to restore them.
2291          */
2292         org_mount_opt = sbi->mount_opt;
2293         old_sb_flags = sb->s_flags;
2294
2295 #ifdef CONFIG_QUOTA
2296         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2297         for (i = 0; i < MAXQUOTAS; i++) {
2298                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2299                         org_mount_opt.s_qf_names[i] =
2300                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2301                                 GFP_KERNEL);
2302                         if (!org_mount_opt.s_qf_names[i]) {
2303                                 for (j = 0; j < i; j++)
2304                                         kfree(org_mount_opt.s_qf_names[j]);
2305                                 return -ENOMEM;
2306                         }
2307                 } else {
2308                         org_mount_opt.s_qf_names[i] = NULL;
2309                 }
2310         }
2311 #endif
2312
2313         /* recover superblocks we couldn't write due to previous RO mount */
2314         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2315                 err = f2fs_commit_super(sbi, false);
2316                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2317                           err);
2318                 if (!err)
2319                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2320         }
2321
2322         default_options(sbi, true);
2323
2324         /* parse mount options */
2325         err = parse_options(sb, data, true);
2326         if (err)
2327                 goto restore_opts;
2328
2329         /* flush outstanding errors before changing fs state */
2330         flush_work(&sbi->s_error_work);
2331
2332         /*
2333          * Previous and new state of filesystem is RO,
2334          * so skip checking GC and FLUSH_MERGE conditions.
2335          */
2336         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2337                 goto skip;
2338
2339         if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
2340                 err = -EROFS;
2341                 goto restore_opts;
2342         }
2343
2344 #ifdef CONFIG_QUOTA
2345         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2346                 err = dquot_suspend(sb, -1);
2347                 if (err < 0)
2348                         goto restore_opts;
2349         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2350                 /* dquot_resume needs RW */
2351                 sb->s_flags &= ~SB_RDONLY;
2352                 if (sb_any_quota_suspended(sb)) {
2353                         dquot_resume(sb, -1);
2354                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2355                         err = f2fs_enable_quotas(sb);
2356                         if (err)
2357                                 goto restore_opts;
2358                 }
2359         }
2360 #endif
2361         if (f2fs_lfs_mode(sbi) && !IS_F2FS_IPU_DISABLE(sbi)) {
2362                 err = -EINVAL;
2363                 f2fs_warn(sbi, "LFS is not compatible with IPU");
2364                 goto restore_opts;
2365         }
2366
2367         /* disallow enable atgc dynamically */
2368         if (no_atgc == !!test_opt(sbi, ATGC)) {
2369                 err = -EINVAL;
2370                 f2fs_warn(sbi, "switch atgc option is not allowed");
2371                 goto restore_opts;
2372         }
2373
2374         /* disallow enable/disable extent_cache dynamically */
2375         if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2376                 err = -EINVAL;
2377                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2378                 goto restore_opts;
2379         }
2380         /* disallow enable/disable age extent_cache dynamically */
2381         if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2382                 err = -EINVAL;
2383                 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2384                 goto restore_opts;
2385         }
2386
2387         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2388                 err = -EINVAL;
2389                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2390                 goto restore_opts;
2391         }
2392
2393         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2394                 err = -EINVAL;
2395                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2396                 goto restore_opts;
2397         }
2398
2399         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2400                 err = -EINVAL;
2401                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2402                 goto restore_opts;
2403         }
2404
2405         /*
2406          * We stop the GC thread if FS is mounted as RO
2407          * or if background_gc = off is passed in mount
2408          * option. Also sync the filesystem.
2409          */
2410         if ((*flags & SB_RDONLY) ||
2411                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2412                         !test_opt(sbi, GC_MERGE))) {
2413                 if (sbi->gc_thread) {
2414                         f2fs_stop_gc_thread(sbi);
2415                         need_restart_gc = true;
2416                 }
2417         } else if (!sbi->gc_thread) {
2418                 err = f2fs_start_gc_thread(sbi);
2419                 if (err)
2420                         goto restore_opts;
2421                 need_stop_gc = true;
2422         }
2423
2424         if (*flags & SB_RDONLY) {
2425                 sync_inodes_sb(sb);
2426
2427                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2428                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2429                 f2fs_sync_fs(sb, 1);
2430                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2431         }
2432
2433         /*
2434          * We stop issue flush thread if FS is mounted as RO
2435          * or if flush_merge is not passed in mount option.
2436          */
2437         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2438                 clear_opt(sbi, FLUSH_MERGE);
2439                 f2fs_destroy_flush_cmd_control(sbi, false);
2440                 need_restart_flush = true;
2441         } else {
2442                 err = f2fs_create_flush_cmd_control(sbi);
2443                 if (err)
2444                         goto restore_gc;
2445                 need_stop_flush = true;
2446         }
2447
2448         if (no_discard == !!test_opt(sbi, DISCARD)) {
2449                 if (test_opt(sbi, DISCARD)) {
2450                         err = f2fs_start_discard_thread(sbi);
2451                         if (err)
2452                                 goto restore_flush;
2453                         need_stop_discard = true;
2454                 } else {
2455                         f2fs_stop_discard_thread(sbi);
2456                         f2fs_issue_discard_timeout(sbi);
2457                         need_restart_discard = true;
2458                 }
2459         }
2460
2461         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2462                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2463                         err = f2fs_disable_checkpoint(sbi);
2464                         if (err)
2465                                 goto restore_discard;
2466                         need_enable_checkpoint = true;
2467                 } else {
2468                         f2fs_enable_checkpoint(sbi);
2469                         need_disable_checkpoint = true;
2470                 }
2471         }
2472
2473         /*
2474          * Place this routine at the end, since a new checkpoint would be
2475          * triggered while remount and we need to take care of it before
2476          * returning from remount.
2477          */
2478         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2479                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2480                 f2fs_stop_ckpt_thread(sbi);
2481         } else {
2482                 /* Flush if the prevous checkpoint, if exists. */
2483                 f2fs_flush_ckpt_thread(sbi);
2484
2485                 err = f2fs_start_ckpt_thread(sbi);
2486                 if (err) {
2487                         f2fs_err(sbi,
2488                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2489                             err);
2490                         goto restore_checkpoint;
2491                 }
2492         }
2493
2494 skip:
2495 #ifdef CONFIG_QUOTA
2496         /* Release old quota file names */
2497         for (i = 0; i < MAXQUOTAS; i++)
2498                 kfree(org_mount_opt.s_qf_names[i]);
2499 #endif
2500         /* Update the POSIXACL Flag */
2501         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2502                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2503
2504         limit_reserve_root(sbi);
2505         adjust_unusable_cap_perc(sbi);
2506         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2507         return 0;
2508 restore_checkpoint:
2509         if (need_enable_checkpoint) {
2510                 f2fs_enable_checkpoint(sbi);
2511         } else if (need_disable_checkpoint) {
2512                 if (f2fs_disable_checkpoint(sbi))
2513                         f2fs_warn(sbi, "checkpoint has not been disabled");
2514         }
2515 restore_discard:
2516         if (need_restart_discard) {
2517                 if (f2fs_start_discard_thread(sbi))
2518                         f2fs_warn(sbi, "discard has been stopped");
2519         } else if (need_stop_discard) {
2520                 f2fs_stop_discard_thread(sbi);
2521         }
2522 restore_flush:
2523         if (need_restart_flush) {
2524                 if (f2fs_create_flush_cmd_control(sbi))
2525                         f2fs_warn(sbi, "background flush thread has stopped");
2526         } else if (need_stop_flush) {
2527                 clear_opt(sbi, FLUSH_MERGE);
2528                 f2fs_destroy_flush_cmd_control(sbi, false);
2529         }
2530 restore_gc:
2531         if (need_restart_gc) {
2532                 if (f2fs_start_gc_thread(sbi))
2533                         f2fs_warn(sbi, "background gc thread has stopped");
2534         } else if (need_stop_gc) {
2535                 f2fs_stop_gc_thread(sbi);
2536         }
2537 restore_opts:
2538 #ifdef CONFIG_QUOTA
2539         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2540         for (i = 0; i < MAXQUOTAS; i++) {
2541                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2542                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2543         }
2544 #endif
2545         sbi->mount_opt = org_mount_opt;
2546         sb->s_flags = old_sb_flags;
2547         return err;
2548 }
2549
2550 #ifdef CONFIG_QUOTA
2551 static bool f2fs_need_recovery(struct f2fs_sb_info *sbi)
2552 {
2553         /* need to recovery orphan */
2554         if (is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
2555                 return true;
2556         /* need to recovery data */
2557         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2558                 return false;
2559         if (test_opt(sbi, NORECOVERY))
2560                 return false;
2561         return !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG);
2562 }
2563
2564 static bool f2fs_recover_quota_begin(struct f2fs_sb_info *sbi)
2565 {
2566         bool readonly = f2fs_readonly(sbi->sb);
2567
2568         if (!f2fs_need_recovery(sbi))
2569                 return false;
2570
2571         /* it doesn't need to check f2fs_sb_has_readonly() */
2572         if (f2fs_hw_is_readonly(sbi))
2573                 return false;
2574
2575         if (readonly) {
2576                 sbi->sb->s_flags &= ~SB_RDONLY;
2577                 set_sbi_flag(sbi, SBI_IS_WRITABLE);
2578         }
2579
2580         /*
2581          * Turn on quotas which were not enabled for read-only mounts if
2582          * filesystem has quota feature, so that they are updated correctly.
2583          */
2584         return f2fs_enable_quota_files(sbi, readonly);
2585 }
2586
2587 static void f2fs_recover_quota_end(struct f2fs_sb_info *sbi,
2588                                                 bool quota_enabled)
2589 {
2590         if (quota_enabled)
2591                 f2fs_quota_off_umount(sbi->sb);
2592
2593         if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE)) {
2594                 clear_sbi_flag(sbi, SBI_IS_WRITABLE);
2595                 sbi->sb->s_flags |= SB_RDONLY;
2596         }
2597 }
2598
2599 /* Read data from quotafile */
2600 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2601                                size_t len, loff_t off)
2602 {
2603         struct inode *inode = sb_dqopt(sb)->files[type];
2604         struct address_space *mapping = inode->i_mapping;
2605         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2606         int offset = off & (sb->s_blocksize - 1);
2607         int tocopy;
2608         size_t toread;
2609         loff_t i_size = i_size_read(inode);
2610         struct page *page;
2611
2612         if (off > i_size)
2613                 return 0;
2614
2615         if (off + len > i_size)
2616                 len = i_size - off;
2617         toread = len;
2618         while (toread > 0) {
2619                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2620 repeat:
2621                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2622                 if (IS_ERR(page)) {
2623                         if (PTR_ERR(page) == -ENOMEM) {
2624                                 memalloc_retry_wait(GFP_NOFS);
2625                                 goto repeat;
2626                         }
2627                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2628                         return PTR_ERR(page);
2629                 }
2630
2631                 lock_page(page);
2632
2633                 if (unlikely(page->mapping != mapping)) {
2634                         f2fs_put_page(page, 1);
2635                         goto repeat;
2636                 }
2637                 if (unlikely(!PageUptodate(page))) {
2638                         f2fs_put_page(page, 1);
2639                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2640                         return -EIO;
2641                 }
2642
2643                 memcpy_from_page(data, page, offset, tocopy);
2644                 f2fs_put_page(page, 1);
2645
2646                 offset = 0;
2647                 toread -= tocopy;
2648                 data += tocopy;
2649                 blkidx++;
2650         }
2651         return len;
2652 }
2653
2654 /* Write to quotafile */
2655 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2656                                 const char *data, size_t len, loff_t off)
2657 {
2658         struct inode *inode = sb_dqopt(sb)->files[type];
2659         struct address_space *mapping = inode->i_mapping;
2660         const struct address_space_operations *a_ops = mapping->a_ops;
2661         int offset = off & (sb->s_blocksize - 1);
2662         size_t towrite = len;
2663         struct page *page;
2664         void *fsdata = NULL;
2665         int err = 0;
2666         int tocopy;
2667
2668         while (towrite > 0) {
2669                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2670                                                                 towrite);
2671 retry:
2672                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2673                                                         &page, &fsdata);
2674                 if (unlikely(err)) {
2675                         if (err == -ENOMEM) {
2676                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2677                                 goto retry;
2678                         }
2679                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2680                         break;
2681                 }
2682
2683                 memcpy_to_page(page, offset, data, tocopy);
2684
2685                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2686                                                 page, fsdata);
2687                 offset = 0;
2688                 towrite -= tocopy;
2689                 off += tocopy;
2690                 data += tocopy;
2691                 cond_resched();
2692         }
2693
2694         if (len == towrite)
2695                 return err;
2696         inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
2697         f2fs_mark_inode_dirty_sync(inode, false);
2698         return len - towrite;
2699 }
2700
2701 int f2fs_dquot_initialize(struct inode *inode)
2702 {
2703         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT))
2704                 return -ESRCH;
2705
2706         return dquot_initialize(inode);
2707 }
2708
2709 static struct dquot __rcu **f2fs_get_dquots(struct inode *inode)
2710 {
2711         return F2FS_I(inode)->i_dquot;
2712 }
2713
2714 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2715 {
2716         return &F2FS_I(inode)->i_reserved_quota;
2717 }
2718
2719 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2720 {
2721         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2722                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2723                 return 0;
2724         }
2725
2726         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2727                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2728 }
2729
2730 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2731 {
2732         int enabled = 0;
2733         int i, err;
2734
2735         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2736                 err = f2fs_enable_quotas(sbi->sb);
2737                 if (err) {
2738                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2739                         return 0;
2740                 }
2741                 return 1;
2742         }
2743
2744         for (i = 0; i < MAXQUOTAS; i++) {
2745                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2746                         err = f2fs_quota_on_mount(sbi, i);
2747                         if (!err) {
2748                                 enabled = 1;
2749                                 continue;
2750                         }
2751                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2752                                  err, i);
2753                 }
2754         }
2755         return enabled;
2756 }
2757
2758 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2759                              unsigned int flags)
2760 {
2761         struct inode *qf_inode;
2762         unsigned long qf_inum;
2763         unsigned long qf_flag = F2FS_QUOTA_DEFAULT_FL;
2764         int err;
2765
2766         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2767
2768         qf_inum = f2fs_qf_ino(sb, type);
2769         if (!qf_inum)
2770                 return -EPERM;
2771
2772         qf_inode = f2fs_iget(sb, qf_inum);
2773         if (IS_ERR(qf_inode)) {
2774                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2775                 return PTR_ERR(qf_inode);
2776         }
2777
2778         /* Don't account quota for quota files to avoid recursion */
2779         inode_lock(qf_inode);
2780         qf_inode->i_flags |= S_NOQUOTA;
2781
2782         if ((F2FS_I(qf_inode)->i_flags & qf_flag) != qf_flag) {
2783                 F2FS_I(qf_inode)->i_flags |= qf_flag;
2784                 f2fs_set_inode_flags(qf_inode);
2785         }
2786         inode_unlock(qf_inode);
2787
2788         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2789         iput(qf_inode);
2790         return err;
2791 }
2792
2793 static int f2fs_enable_quotas(struct super_block *sb)
2794 {
2795         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2796         int type, err = 0;
2797         unsigned long qf_inum;
2798         bool quota_mopt[MAXQUOTAS] = {
2799                 test_opt(sbi, USRQUOTA),
2800                 test_opt(sbi, GRPQUOTA),
2801                 test_opt(sbi, PRJQUOTA),
2802         };
2803
2804         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2805                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2806                 return 0;
2807         }
2808
2809         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2810
2811         for (type = 0; type < MAXQUOTAS; type++) {
2812                 qf_inum = f2fs_qf_ino(sb, type);
2813                 if (qf_inum) {
2814                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2815                                 DQUOT_USAGE_ENABLED |
2816                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2817                         if (err) {
2818                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2819                                          type, err);
2820                                 for (type--; type >= 0; type--)
2821                                         dquot_quota_off(sb, type);
2822                                 set_sbi_flag(F2FS_SB(sb),
2823                                                 SBI_QUOTA_NEED_REPAIR);
2824                                 return err;
2825                         }
2826                 }
2827         }
2828         return 0;
2829 }
2830
2831 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2832 {
2833         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2834         struct address_space *mapping = dqopt->files[type]->i_mapping;
2835         int ret = 0;
2836
2837         ret = dquot_writeback_dquots(sbi->sb, type);
2838         if (ret)
2839                 goto out;
2840
2841         ret = filemap_fdatawrite(mapping);
2842         if (ret)
2843                 goto out;
2844
2845         /* if we are using journalled quota */
2846         if (is_journalled_quota(sbi))
2847                 goto out;
2848
2849         ret = filemap_fdatawait(mapping);
2850
2851         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2852 out:
2853         if (ret)
2854                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2855         return ret;
2856 }
2857
2858 int f2fs_quota_sync(struct super_block *sb, int type)
2859 {
2860         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2861         struct quota_info *dqopt = sb_dqopt(sb);
2862         int cnt;
2863         int ret = 0;
2864
2865         /*
2866          * Now when everything is written we can discard the pagecache so
2867          * that userspace sees the changes.
2868          */
2869         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2870
2871                 if (type != -1 && cnt != type)
2872                         continue;
2873
2874                 if (!sb_has_quota_active(sb, cnt))
2875                         continue;
2876
2877                 if (!f2fs_sb_has_quota_ino(sbi))
2878                         inode_lock(dqopt->files[cnt]);
2879
2880                 /*
2881                  * do_quotactl
2882                  *  f2fs_quota_sync
2883                  *  f2fs_down_read(quota_sem)
2884                  *  dquot_writeback_dquots()
2885                  *  f2fs_dquot_commit
2886                  *                            block_operation
2887                  *                            f2fs_down_read(quota_sem)
2888                  */
2889                 f2fs_lock_op(sbi);
2890                 f2fs_down_read(&sbi->quota_sem);
2891
2892                 ret = f2fs_quota_sync_file(sbi, cnt);
2893
2894                 f2fs_up_read(&sbi->quota_sem);
2895                 f2fs_unlock_op(sbi);
2896
2897                 if (!f2fs_sb_has_quota_ino(sbi))
2898                         inode_unlock(dqopt->files[cnt]);
2899
2900                 if (ret)
2901                         break;
2902         }
2903         return ret;
2904 }
2905
2906 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2907                                                         const struct path *path)
2908 {
2909         struct inode *inode;
2910         int err;
2911
2912         /* if quota sysfile exists, deny enabling quota with specific file */
2913         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2914                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2915                 return -EBUSY;
2916         }
2917
2918         if (path->dentry->d_sb != sb)
2919                 return -EXDEV;
2920
2921         err = f2fs_quota_sync(sb, type);
2922         if (err)
2923                 return err;
2924
2925         inode = d_inode(path->dentry);
2926
2927         err = filemap_fdatawrite(inode->i_mapping);
2928         if (err)
2929                 return err;
2930
2931         err = filemap_fdatawait(inode->i_mapping);
2932         if (err)
2933                 return err;
2934
2935         err = dquot_quota_on(sb, type, format_id, path);
2936         if (err)
2937                 return err;
2938
2939         inode_lock(inode);
2940         F2FS_I(inode)->i_flags |= F2FS_QUOTA_DEFAULT_FL;
2941         f2fs_set_inode_flags(inode);
2942         inode_unlock(inode);
2943         f2fs_mark_inode_dirty_sync(inode, false);
2944
2945         return 0;
2946 }
2947
2948 static int __f2fs_quota_off(struct super_block *sb, int type)
2949 {
2950         struct inode *inode = sb_dqopt(sb)->files[type];
2951         int err;
2952
2953         if (!inode || !igrab(inode))
2954                 return dquot_quota_off(sb, type);
2955
2956         err = f2fs_quota_sync(sb, type);
2957         if (err)
2958                 goto out_put;
2959
2960         err = dquot_quota_off(sb, type);
2961         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2962                 goto out_put;
2963
2964         inode_lock(inode);
2965         F2FS_I(inode)->i_flags &= ~F2FS_QUOTA_DEFAULT_FL;
2966         f2fs_set_inode_flags(inode);
2967         inode_unlock(inode);
2968         f2fs_mark_inode_dirty_sync(inode, false);
2969 out_put:
2970         iput(inode);
2971         return err;
2972 }
2973
2974 static int f2fs_quota_off(struct super_block *sb, int type)
2975 {
2976         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2977         int err;
2978
2979         err = __f2fs_quota_off(sb, type);
2980
2981         /*
2982          * quotactl can shutdown journalled quota, result in inconsistence
2983          * between quota record and fs data by following updates, tag the
2984          * flag to let fsck be aware of it.
2985          */
2986         if (is_journalled_quota(sbi))
2987                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2988         return err;
2989 }
2990
2991 void f2fs_quota_off_umount(struct super_block *sb)
2992 {
2993         int type;
2994         int err;
2995
2996         for (type = 0; type < MAXQUOTAS; type++) {
2997                 err = __f2fs_quota_off(sb, type);
2998                 if (err) {
2999                         int ret = dquot_quota_off(sb, type);
3000
3001                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
3002                                  type, err, ret);
3003                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
3004                 }
3005         }
3006         /*
3007          * In case of checkpoint=disable, we must flush quota blocks.
3008          * This can cause NULL exception for node_inode in end_io, since
3009          * put_super already dropped it.
3010          */
3011         sync_filesystem(sb);
3012 }
3013
3014 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
3015 {
3016         struct quota_info *dqopt = sb_dqopt(sb);
3017         int type;
3018
3019         for (type = 0; type < MAXQUOTAS; type++) {
3020                 if (!dqopt->files[type])
3021                         continue;
3022                 f2fs_inode_synced(dqopt->files[type]);
3023         }
3024 }
3025
3026 static int f2fs_dquot_commit(struct dquot *dquot)
3027 {
3028         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3029         int ret;
3030
3031         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
3032         ret = dquot_commit(dquot);
3033         if (ret < 0)
3034                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3035         f2fs_up_read(&sbi->quota_sem);
3036         return ret;
3037 }
3038
3039 static int f2fs_dquot_acquire(struct dquot *dquot)
3040 {
3041         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3042         int ret;
3043
3044         f2fs_down_read(&sbi->quota_sem);
3045         ret = dquot_acquire(dquot);
3046         if (ret < 0)
3047                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3048         f2fs_up_read(&sbi->quota_sem);
3049         return ret;
3050 }
3051
3052 static int f2fs_dquot_release(struct dquot *dquot)
3053 {
3054         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3055         int ret = dquot_release(dquot);
3056
3057         if (ret < 0)
3058                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3059         return ret;
3060 }
3061
3062 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
3063 {
3064         struct super_block *sb = dquot->dq_sb;
3065         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3066         int ret = dquot_mark_dquot_dirty(dquot);
3067
3068         /* if we are using journalled quota */
3069         if (is_journalled_quota(sbi))
3070                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
3071
3072         return ret;
3073 }
3074
3075 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
3076 {
3077         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3078         int ret = dquot_commit_info(sb, type);
3079
3080         if (ret < 0)
3081                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3082         return ret;
3083 }
3084
3085 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
3086 {
3087         *projid = F2FS_I(inode)->i_projid;
3088         return 0;
3089 }
3090
3091 static const struct dquot_operations f2fs_quota_operations = {
3092         .get_reserved_space = f2fs_get_reserved_space,
3093         .write_dquot    = f2fs_dquot_commit,
3094         .acquire_dquot  = f2fs_dquot_acquire,
3095         .release_dquot  = f2fs_dquot_release,
3096         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
3097         .write_info     = f2fs_dquot_commit_info,
3098         .alloc_dquot    = dquot_alloc,
3099         .destroy_dquot  = dquot_destroy,
3100         .get_projid     = f2fs_get_projid,
3101         .get_next_id    = dquot_get_next_id,
3102 };
3103
3104 static const struct quotactl_ops f2fs_quotactl_ops = {
3105         .quota_on       = f2fs_quota_on,
3106         .quota_off      = f2fs_quota_off,
3107         .quota_sync     = f2fs_quota_sync,
3108         .get_state      = dquot_get_state,
3109         .set_info       = dquot_set_dqinfo,
3110         .get_dqblk      = dquot_get_dqblk,
3111         .set_dqblk      = dquot_set_dqblk,
3112         .get_nextdqblk  = dquot_get_next_dqblk,
3113 };
3114 #else
3115 int f2fs_dquot_initialize(struct inode *inode)
3116 {
3117         return 0;
3118 }
3119
3120 int f2fs_quota_sync(struct super_block *sb, int type)
3121 {
3122         return 0;
3123 }
3124
3125 void f2fs_quota_off_umount(struct super_block *sb)
3126 {
3127 }
3128 #endif
3129
3130 static const struct super_operations f2fs_sops = {
3131         .alloc_inode    = f2fs_alloc_inode,
3132         .free_inode     = f2fs_free_inode,
3133         .drop_inode     = f2fs_drop_inode,
3134         .write_inode    = f2fs_write_inode,
3135         .dirty_inode    = f2fs_dirty_inode,
3136         .show_options   = f2fs_show_options,
3137 #ifdef CONFIG_QUOTA
3138         .quota_read     = f2fs_quota_read,
3139         .quota_write    = f2fs_quota_write,
3140         .get_dquots     = f2fs_get_dquots,
3141 #endif
3142         .evict_inode    = f2fs_evict_inode,
3143         .put_super      = f2fs_put_super,
3144         .sync_fs        = f2fs_sync_fs,
3145         .freeze_fs      = f2fs_freeze,
3146         .unfreeze_fs    = f2fs_unfreeze,
3147         .statfs         = f2fs_statfs,
3148         .remount_fs     = f2fs_remount,
3149 };
3150
3151 #ifdef CONFIG_FS_ENCRYPTION
3152 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3153 {
3154         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3155                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3156                                 ctx, len, NULL);
3157 }
3158
3159 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3160                                                         void *fs_data)
3161 {
3162         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3163
3164         /*
3165          * Encrypting the root directory is not allowed because fsck
3166          * expects lost+found directory to exist and remain unencrypted
3167          * if LOST_FOUND feature is enabled.
3168          *
3169          */
3170         if (f2fs_sb_has_lost_found(sbi) &&
3171                         inode->i_ino == F2FS_ROOT_INO(sbi))
3172                 return -EPERM;
3173
3174         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3175                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3176                                 ctx, len, fs_data, XATTR_CREATE);
3177 }
3178
3179 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3180 {
3181         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3182 }
3183
3184 static bool f2fs_has_stable_inodes(struct super_block *sb)
3185 {
3186         return true;
3187 }
3188
3189 static struct block_device **f2fs_get_devices(struct super_block *sb,
3190                                               unsigned int *num_devs)
3191 {
3192         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3193         struct block_device **devs;
3194         int i;
3195
3196         if (!f2fs_is_multi_device(sbi))
3197                 return NULL;
3198
3199         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3200         if (!devs)
3201                 return ERR_PTR(-ENOMEM);
3202
3203         for (i = 0; i < sbi->s_ndevs; i++)
3204                 devs[i] = FDEV(i).bdev;
3205         *num_devs = sbi->s_ndevs;
3206         return devs;
3207 }
3208
3209 static const struct fscrypt_operations f2fs_cryptops = {
3210         .needs_bounce_pages     = 1,
3211         .has_32bit_inodes       = 1,
3212         .supports_subblock_data_units = 1,
3213         .legacy_key_prefix      = "f2fs:",
3214         .get_context            = f2fs_get_context,
3215         .set_context            = f2fs_set_context,
3216         .get_dummy_policy       = f2fs_get_dummy_policy,
3217         .empty_dir              = f2fs_empty_dir,
3218         .has_stable_inodes      = f2fs_has_stable_inodes,
3219         .get_devices            = f2fs_get_devices,
3220 };
3221 #endif
3222
3223 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3224                 u64 ino, u32 generation)
3225 {
3226         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3227         struct inode *inode;
3228
3229         if (f2fs_check_nid_range(sbi, ino))
3230                 return ERR_PTR(-ESTALE);
3231
3232         /*
3233          * f2fs_iget isn't quite right if the inode is currently unallocated!
3234          * However f2fs_iget currently does appropriate checks to handle stale
3235          * inodes so everything is OK.
3236          */
3237         inode = f2fs_iget(sb, ino);
3238         if (IS_ERR(inode))
3239                 return ERR_CAST(inode);
3240         if (unlikely(generation && inode->i_generation != generation)) {
3241                 /* we didn't find the right inode.. */
3242                 iput(inode);
3243                 return ERR_PTR(-ESTALE);
3244         }
3245         return inode;
3246 }
3247
3248 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3249                 int fh_len, int fh_type)
3250 {
3251         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3252                                     f2fs_nfs_get_inode);
3253 }
3254
3255 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3256                 int fh_len, int fh_type)
3257 {
3258         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3259                                     f2fs_nfs_get_inode);
3260 }
3261
3262 static const struct export_operations f2fs_export_ops = {
3263         .encode_fh = generic_encode_ino32_fh,
3264         .fh_to_dentry = f2fs_fh_to_dentry,
3265         .fh_to_parent = f2fs_fh_to_parent,
3266         .get_parent = f2fs_get_parent,
3267 };
3268
3269 loff_t max_file_blocks(struct inode *inode)
3270 {
3271         loff_t result = 0;
3272         loff_t leaf_count;
3273
3274         /*
3275          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3276          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3277          * space in inode.i_addr, it will be more safe to reassign
3278          * result as zero.
3279          */
3280
3281         if (inode && f2fs_compressed_file(inode))
3282                 leaf_count = ADDRS_PER_BLOCK(inode);
3283         else
3284                 leaf_count = DEF_ADDRS_PER_BLOCK;
3285
3286         /* two direct node blocks */
3287         result += (leaf_count * 2);
3288
3289         /* two indirect node blocks */
3290         leaf_count *= NIDS_PER_BLOCK;
3291         result += (leaf_count * 2);
3292
3293         /* one double indirect node block */
3294         leaf_count *= NIDS_PER_BLOCK;
3295         result += leaf_count;
3296
3297         /*
3298          * For compatibility with FSCRYPT_POLICY_FLAG_IV_INO_LBLK_{64,32} with
3299          * a 4K crypto data unit, we must restrict the max filesize to what can
3300          * fit within U32_MAX + 1 data units.
3301          */
3302
3303         result = min(result, (((loff_t)U32_MAX + 1) * 4096) >> F2FS_BLKSIZE_BITS);
3304
3305         return result;
3306 }
3307
3308 static int __f2fs_commit_super(struct buffer_head *bh,
3309                         struct f2fs_super_block *super)
3310 {
3311         lock_buffer(bh);
3312         if (super)
3313                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3314         set_buffer_dirty(bh);
3315         unlock_buffer(bh);
3316
3317         /* it's rare case, we can do fua all the time */
3318         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3319 }
3320
3321 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3322                                         struct buffer_head *bh)
3323 {
3324         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3325                                         (bh->b_data + F2FS_SUPER_OFFSET);
3326         struct super_block *sb = sbi->sb;
3327         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3328         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3329         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3330         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3331         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3332         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3333         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3334         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3335         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3336         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3337         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3338         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3339         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3340         u64 main_end_blkaddr = main_blkaddr +
3341                                 (segment_count_main << log_blocks_per_seg);
3342         u64 seg_end_blkaddr = segment0_blkaddr +
3343                                 (segment_count << log_blocks_per_seg);
3344
3345         if (segment0_blkaddr != cp_blkaddr) {
3346                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3347                           segment0_blkaddr, cp_blkaddr);
3348                 return true;
3349         }
3350
3351         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3352                                                         sit_blkaddr) {
3353                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3354                           cp_blkaddr, sit_blkaddr,
3355                           segment_count_ckpt << log_blocks_per_seg);
3356                 return true;
3357         }
3358
3359         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3360                                                         nat_blkaddr) {
3361                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3362                           sit_blkaddr, nat_blkaddr,
3363                           segment_count_sit << log_blocks_per_seg);
3364                 return true;
3365         }
3366
3367         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3368                                                         ssa_blkaddr) {
3369                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3370                           nat_blkaddr, ssa_blkaddr,
3371                           segment_count_nat << log_blocks_per_seg);
3372                 return true;
3373         }
3374
3375         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3376                                                         main_blkaddr) {
3377                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3378                           ssa_blkaddr, main_blkaddr,
3379                           segment_count_ssa << log_blocks_per_seg);
3380                 return true;
3381         }
3382
3383         if (main_end_blkaddr > seg_end_blkaddr) {
3384                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3385                           main_blkaddr, seg_end_blkaddr,
3386                           segment_count_main << log_blocks_per_seg);
3387                 return true;
3388         } else if (main_end_blkaddr < seg_end_blkaddr) {
3389                 int err = 0;
3390                 char *res;
3391
3392                 /* fix in-memory information all the time */
3393                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3394                                 segment0_blkaddr) >> log_blocks_per_seg);
3395
3396                 if (f2fs_readonly(sb) || f2fs_hw_is_readonly(sbi)) {
3397                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3398                         res = "internally";
3399                 } else {
3400                         err = __f2fs_commit_super(bh, NULL);
3401                         res = err ? "failed" : "done";
3402                 }
3403                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3404                           res, main_blkaddr, seg_end_blkaddr,
3405                           segment_count_main << log_blocks_per_seg);
3406                 if (err)
3407                         return true;
3408         }
3409         return false;
3410 }
3411
3412 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3413                                 struct buffer_head *bh)
3414 {
3415         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3416         block_t total_sections, blocks_per_seg;
3417         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3418                                         (bh->b_data + F2FS_SUPER_OFFSET);
3419         size_t crc_offset = 0;
3420         __u32 crc = 0;
3421
3422         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3423                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3424                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3425                 return -EINVAL;
3426         }
3427
3428         /* Check checksum_offset and crc in superblock */
3429         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3430                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3431                 if (crc_offset !=
3432                         offsetof(struct f2fs_super_block, crc)) {
3433                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3434                                   crc_offset);
3435                         return -EFSCORRUPTED;
3436                 }
3437                 crc = le32_to_cpu(raw_super->crc);
3438                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3439                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3440                         return -EFSCORRUPTED;
3441                 }
3442         }
3443
3444         /* Currently, support only 4KB block size */
3445         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3446                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3447                           le32_to_cpu(raw_super->log_blocksize),
3448                           F2FS_BLKSIZE_BITS);
3449                 return -EFSCORRUPTED;
3450         }
3451
3452         /* check log blocks per segment */
3453         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3454                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3455                           le32_to_cpu(raw_super->log_blocks_per_seg));
3456                 return -EFSCORRUPTED;
3457         }
3458
3459         /* Currently, support 512/1024/2048/4096/16K bytes sector size */
3460         if (le32_to_cpu(raw_super->log_sectorsize) >
3461                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3462                 le32_to_cpu(raw_super->log_sectorsize) <
3463                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3464                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3465                           le32_to_cpu(raw_super->log_sectorsize));
3466                 return -EFSCORRUPTED;
3467         }
3468         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3469                 le32_to_cpu(raw_super->log_sectorsize) !=
3470                         F2FS_MAX_LOG_SECTOR_SIZE) {
3471                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3472                           le32_to_cpu(raw_super->log_sectors_per_block),
3473                           le32_to_cpu(raw_super->log_sectorsize));
3474                 return -EFSCORRUPTED;
3475         }
3476
3477         segment_count = le32_to_cpu(raw_super->segment_count);
3478         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3479         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3480         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3481         total_sections = le32_to_cpu(raw_super->section_count);
3482
3483         /* blocks_per_seg should be 512, given the above check */
3484         blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg));
3485
3486         if (segment_count > F2FS_MAX_SEGMENT ||
3487                                 segment_count < F2FS_MIN_SEGMENTS) {
3488                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3489                 return -EFSCORRUPTED;
3490         }
3491
3492         if (total_sections > segment_count_main || total_sections < 1 ||
3493                         segs_per_sec > segment_count || !segs_per_sec) {
3494                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3495                           segment_count, total_sections, segs_per_sec);
3496                 return -EFSCORRUPTED;
3497         }
3498
3499         if (segment_count_main != total_sections * segs_per_sec) {
3500                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3501                           segment_count_main, total_sections, segs_per_sec);
3502                 return -EFSCORRUPTED;
3503         }
3504
3505         if ((segment_count / segs_per_sec) < total_sections) {
3506                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3507                           segment_count, segs_per_sec, total_sections);
3508                 return -EFSCORRUPTED;
3509         }
3510
3511         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3512                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3513                           segment_count, le64_to_cpu(raw_super->block_count));
3514                 return -EFSCORRUPTED;
3515         }
3516
3517         if (RDEV(0).path[0]) {
3518                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3519                 int i = 1;
3520
3521                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3522                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3523                         i++;
3524                 }
3525                 if (segment_count != dev_seg_count) {
3526                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3527                                         segment_count, dev_seg_count);
3528                         return -EFSCORRUPTED;
3529                 }
3530         } else {
3531                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3532                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3533                         f2fs_info(sbi, "Zoned block device path is missing");
3534                         return -EFSCORRUPTED;
3535                 }
3536         }
3537
3538         if (secs_per_zone > total_sections || !secs_per_zone) {
3539                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3540                           secs_per_zone, total_sections);
3541                 return -EFSCORRUPTED;
3542         }
3543         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3544                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3545                         (le32_to_cpu(raw_super->extension_count) +
3546                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3547                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3548                           le32_to_cpu(raw_super->extension_count),
3549                           raw_super->hot_ext_count,
3550                           F2FS_MAX_EXTENSION);
3551                 return -EFSCORRUPTED;
3552         }
3553
3554         if (le32_to_cpu(raw_super->cp_payload) >=
3555                                 (blocks_per_seg - F2FS_CP_PACKS -
3556                                 NR_CURSEG_PERSIST_TYPE)) {
3557                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3558                           le32_to_cpu(raw_super->cp_payload),
3559                           blocks_per_seg - F2FS_CP_PACKS -
3560                           NR_CURSEG_PERSIST_TYPE);
3561                 return -EFSCORRUPTED;
3562         }
3563
3564         /* check reserved ino info */
3565         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3566                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3567                 le32_to_cpu(raw_super->root_ino) != 3) {
3568                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3569                           le32_to_cpu(raw_super->node_ino),
3570                           le32_to_cpu(raw_super->meta_ino),
3571                           le32_to_cpu(raw_super->root_ino));
3572                 return -EFSCORRUPTED;
3573         }
3574
3575         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3576         if (sanity_check_area_boundary(sbi, bh))
3577                 return -EFSCORRUPTED;
3578
3579         return 0;
3580 }
3581
3582 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3583 {
3584         unsigned int total, fsmeta;
3585         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3586         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3587         unsigned int ovp_segments, reserved_segments;
3588         unsigned int main_segs, blocks_per_seg;
3589         unsigned int sit_segs, nat_segs;
3590         unsigned int sit_bitmap_size, nat_bitmap_size;
3591         unsigned int log_blocks_per_seg;
3592         unsigned int segment_count_main;
3593         unsigned int cp_pack_start_sum, cp_payload;
3594         block_t user_block_count, valid_user_blocks;
3595         block_t avail_node_count, valid_node_count;
3596         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3597         int i, j;
3598
3599         total = le32_to_cpu(raw_super->segment_count);
3600         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3601         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3602         fsmeta += sit_segs;
3603         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3604         fsmeta += nat_segs;
3605         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3606         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3607
3608         if (unlikely(fsmeta >= total))
3609                 return 1;
3610
3611         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3612         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3613
3614         if (!f2fs_sb_has_readonly(sbi) &&
3615                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3616                         ovp_segments == 0 || reserved_segments == 0)) {
3617                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3618                 return 1;
3619         }
3620         user_block_count = le64_to_cpu(ckpt->user_block_count);
3621         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3622                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3623         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3624         if (!user_block_count || user_block_count >=
3625                         segment_count_main << log_blocks_per_seg) {
3626                 f2fs_err(sbi, "Wrong user_block_count: %u",
3627                          user_block_count);
3628                 return 1;
3629         }
3630
3631         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3632         if (valid_user_blocks > user_block_count) {
3633                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3634                          valid_user_blocks, user_block_count);
3635                 return 1;
3636         }
3637
3638         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3639         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3640         if (valid_node_count > avail_node_count) {
3641                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3642                          valid_node_count, avail_node_count);
3643                 return 1;
3644         }
3645
3646         main_segs = le32_to_cpu(raw_super->segment_count_main);
3647         blocks_per_seg = BLKS_PER_SEG(sbi);
3648
3649         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3650                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3651                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3652                         return 1;
3653
3654                 if (f2fs_sb_has_readonly(sbi))
3655                         goto check_data;
3656
3657                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3658                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3659                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3660                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3661                                          i, j,
3662                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3663                                 return 1;
3664                         }
3665                 }
3666         }
3667 check_data:
3668         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3669                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3670                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3671                         return 1;
3672
3673                 if (f2fs_sb_has_readonly(sbi))
3674                         goto skip_cross;
3675
3676                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3677                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3678                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3679                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3680                                          i, j,
3681                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3682                                 return 1;
3683                         }
3684                 }
3685         }
3686         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3687                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3688                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3689                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3690                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3691                                          i, j,
3692                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3693                                 return 1;
3694                         }
3695                 }
3696         }
3697 skip_cross:
3698         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3699         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3700
3701         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3702                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3703                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3704                          sit_bitmap_size, nat_bitmap_size);
3705                 return 1;
3706         }
3707
3708         cp_pack_start_sum = __start_sum_addr(sbi);
3709         cp_payload = __cp_payload(sbi);
3710         if (cp_pack_start_sum < cp_payload + 1 ||
3711                 cp_pack_start_sum > blocks_per_seg - 1 -
3712                         NR_CURSEG_PERSIST_TYPE) {
3713                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3714                          cp_pack_start_sum);
3715                 return 1;
3716         }
3717
3718         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3719                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3720                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3721                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3722                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3723                           le32_to_cpu(ckpt->checksum_offset));
3724                 return 1;
3725         }
3726
3727         nat_blocks = nat_segs << log_blocks_per_seg;
3728         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3729         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3730         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3731                 (cp_payload + F2FS_CP_PACKS +
3732                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3733                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3734                           cp_payload, nat_bits_blocks);
3735                 return 1;
3736         }
3737
3738         if (unlikely(f2fs_cp_error(sbi))) {
3739                 f2fs_err(sbi, "A bug case: need to run fsck");
3740                 return 1;
3741         }
3742         return 0;
3743 }
3744
3745 static void init_sb_info(struct f2fs_sb_info *sbi)
3746 {
3747         struct f2fs_super_block *raw_super = sbi->raw_super;
3748         int i;
3749
3750         sbi->log_sectors_per_block =
3751                 le32_to_cpu(raw_super->log_sectors_per_block);
3752         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3753         sbi->blocksize = BIT(sbi->log_blocksize);
3754         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3755         sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg);
3756         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3757         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3758         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3759         sbi->total_node_count = SEGS_TO_BLKS(sbi,
3760                         ((le32_to_cpu(raw_super->segment_count_nat) / 2) *
3761                         NAT_ENTRY_PER_BLOCK));
3762         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3763         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3764         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3765         sbi->cur_victim_sec = NULL_SECNO;
3766         sbi->gc_mode = GC_NORMAL;
3767         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3768         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3769         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3770         sbi->migration_granularity = SEGS_PER_SEC(sbi);
3771         sbi->seq_file_ra_mul = MIN_RA_MUL;
3772         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3773         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3774         spin_lock_init(&sbi->gc_remaining_trials_lock);
3775         atomic64_set(&sbi->current_atomic_write, 0);
3776
3777         sbi->dir_level = DEF_DIR_LEVEL;
3778         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3779         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3780         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3781         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3782         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3783         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3784                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3785         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3786
3787         for (i = 0; i < NR_COUNT_TYPE; i++)
3788                 atomic_set(&sbi->nr_pages[i], 0);
3789
3790         for (i = 0; i < META; i++)
3791                 atomic_set(&sbi->wb_sync_req[i], 0);
3792
3793         INIT_LIST_HEAD(&sbi->s_list);
3794         mutex_init(&sbi->umount_mutex);
3795         init_f2fs_rwsem(&sbi->io_order_lock);
3796         spin_lock_init(&sbi->cp_lock);
3797
3798         sbi->dirty_device = 0;
3799         spin_lock_init(&sbi->dev_lock);
3800
3801         init_f2fs_rwsem(&sbi->sb_lock);
3802         init_f2fs_rwsem(&sbi->pin_sem);
3803 }
3804
3805 static int init_percpu_info(struct f2fs_sb_info *sbi)
3806 {
3807         int err;
3808
3809         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3810         if (err)
3811                 return err;
3812
3813         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3814         if (err)
3815                 goto err_valid_block;
3816
3817         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3818                                                                 GFP_KERNEL);
3819         if (err)
3820                 goto err_node_block;
3821         return 0;
3822
3823 err_node_block:
3824         percpu_counter_destroy(&sbi->rf_node_block_count);
3825 err_valid_block:
3826         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3827         return err;
3828 }
3829
3830 #ifdef CONFIG_BLK_DEV_ZONED
3831
3832 struct f2fs_report_zones_args {
3833         struct f2fs_sb_info *sbi;
3834         struct f2fs_dev_info *dev;
3835 };
3836
3837 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3838                               void *data)
3839 {
3840         struct f2fs_report_zones_args *rz_args = data;
3841         block_t unusable_blocks = (zone->len - zone->capacity) >>
3842                                         F2FS_LOG_SECTORS_PER_BLOCK;
3843
3844         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3845                 return 0;
3846
3847         set_bit(idx, rz_args->dev->blkz_seq);
3848         if (!rz_args->sbi->unusable_blocks_per_sec) {
3849                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3850                 return 0;
3851         }
3852         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3853                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3854                 return -EINVAL;
3855         }
3856         return 0;
3857 }
3858
3859 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3860 {
3861         struct block_device *bdev = FDEV(devi).bdev;
3862         sector_t nr_sectors = bdev_nr_sectors(bdev);
3863         struct f2fs_report_zones_args rep_zone_arg;
3864         u64 zone_sectors;
3865         int ret;
3866
3867         if (!f2fs_sb_has_blkzoned(sbi))
3868                 return 0;
3869
3870         zone_sectors = bdev_zone_sectors(bdev);
3871         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3872                                 SECTOR_TO_BLOCK(zone_sectors))
3873                 return -EINVAL;
3874         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3875         FDEV(devi).nr_blkz = div_u64(SECTOR_TO_BLOCK(nr_sectors),
3876                                         sbi->blocks_per_blkz);
3877         if (nr_sectors & (zone_sectors - 1))
3878                 FDEV(devi).nr_blkz++;
3879
3880         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3881                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3882                                         * sizeof(unsigned long),
3883                                         GFP_KERNEL);
3884         if (!FDEV(devi).blkz_seq)
3885                 return -ENOMEM;
3886
3887         rep_zone_arg.sbi = sbi;
3888         rep_zone_arg.dev = &FDEV(devi);
3889
3890         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3891                                   &rep_zone_arg);
3892         if (ret < 0)
3893                 return ret;
3894         return 0;
3895 }
3896 #endif
3897
3898 /*
3899  * Read f2fs raw super block.
3900  * Because we have two copies of super block, so read both of them
3901  * to get the first valid one. If any one of them is broken, we pass
3902  * them recovery flag back to the caller.
3903  */
3904 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3905                         struct f2fs_super_block **raw_super,
3906                         int *valid_super_block, int *recovery)
3907 {
3908         struct super_block *sb = sbi->sb;
3909         int block;
3910         struct buffer_head *bh;
3911         struct f2fs_super_block *super;
3912         int err = 0;
3913
3914         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3915         if (!super)
3916                 return -ENOMEM;
3917
3918         for (block = 0; block < 2; block++) {
3919                 bh = sb_bread(sb, block);
3920                 if (!bh) {
3921                         f2fs_err(sbi, "Unable to read %dth superblock",
3922                                  block + 1);
3923                         err = -EIO;
3924                         *recovery = 1;
3925                         continue;
3926                 }
3927
3928                 /* sanity checking of raw super */
3929                 err = sanity_check_raw_super(sbi, bh);
3930                 if (err) {
3931                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3932                                  block + 1);
3933                         brelse(bh);
3934                         *recovery = 1;
3935                         continue;
3936                 }
3937
3938                 if (!*raw_super) {
3939                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3940                                                         sizeof(*super));
3941                         *valid_super_block = block;
3942                         *raw_super = super;
3943                 }
3944                 brelse(bh);
3945         }
3946
3947         /* No valid superblock */
3948         if (!*raw_super)
3949                 kfree(super);
3950         else
3951                 err = 0;
3952
3953         return err;
3954 }
3955
3956 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3957 {
3958         struct buffer_head *bh;
3959         __u32 crc = 0;
3960         int err;
3961
3962         if ((recover && f2fs_readonly(sbi->sb)) ||
3963                                 f2fs_hw_is_readonly(sbi)) {
3964                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3965                 return -EROFS;
3966         }
3967
3968         /* we should update superblock crc here */
3969         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3970                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3971                                 offsetof(struct f2fs_super_block, crc));
3972                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3973         }
3974
3975         /* write back-up superblock first */
3976         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3977         if (!bh)
3978                 return -EIO;
3979         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3980         brelse(bh);
3981
3982         /* if we are in recovery path, skip writing valid superblock */
3983         if (recover || err)
3984                 return err;
3985
3986         /* write current valid superblock */
3987         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3988         if (!bh)
3989                 return -EIO;
3990         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3991         brelse(bh);
3992         return err;
3993 }
3994
3995 static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
3996 {
3997         unsigned long flags;
3998
3999         spin_lock_irqsave(&sbi->error_lock, flags);
4000         if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
4001                 sbi->stop_reason[reason]++;
4002         spin_unlock_irqrestore(&sbi->error_lock, flags);
4003 }
4004
4005 static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
4006 {
4007         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4008         unsigned long flags;
4009         int err;
4010
4011         f2fs_down_write(&sbi->sb_lock);
4012
4013         spin_lock_irqsave(&sbi->error_lock, flags);
4014         if (sbi->error_dirty) {
4015                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4016                                                         MAX_F2FS_ERRORS);
4017                 sbi->error_dirty = false;
4018         }
4019         memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
4020         spin_unlock_irqrestore(&sbi->error_lock, flags);
4021
4022         err = f2fs_commit_super(sbi, false);
4023
4024         f2fs_up_write(&sbi->sb_lock);
4025         if (err)
4026                 f2fs_err_ratelimited(sbi,
4027                         "f2fs_commit_super fails to record stop_reason, err:%d",
4028                         err);
4029 }
4030
4031 void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
4032 {
4033         unsigned long flags;
4034
4035         spin_lock_irqsave(&sbi->error_lock, flags);
4036         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
4037                 set_bit(flag, (unsigned long *)sbi->errors);
4038                 sbi->error_dirty = true;
4039         }
4040         spin_unlock_irqrestore(&sbi->error_lock, flags);
4041 }
4042
4043 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
4044 {
4045         unsigned long flags;
4046         bool need_update = false;
4047
4048         spin_lock_irqsave(&sbi->error_lock, flags);
4049         if (sbi->error_dirty) {
4050                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4051                                                         MAX_F2FS_ERRORS);
4052                 sbi->error_dirty = false;
4053                 need_update = true;
4054         }
4055         spin_unlock_irqrestore(&sbi->error_lock, flags);
4056
4057         return need_update;
4058 }
4059
4060 static void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error)
4061 {
4062         int err;
4063
4064         f2fs_down_write(&sbi->sb_lock);
4065
4066         if (!f2fs_update_errors(sbi))
4067                 goto out_unlock;
4068
4069         err = f2fs_commit_super(sbi, false);
4070         if (err)
4071                 f2fs_err_ratelimited(sbi,
4072                         "f2fs_commit_super fails to record errors:%u, err:%d",
4073                         error, err);
4074 out_unlock:
4075         f2fs_up_write(&sbi->sb_lock);
4076 }
4077
4078 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
4079 {
4080         f2fs_save_errors(sbi, error);
4081         f2fs_record_errors(sbi, error);
4082 }
4083
4084 void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error)
4085 {
4086         f2fs_save_errors(sbi, error);
4087
4088         if (!sbi->error_dirty)
4089                 return;
4090         if (!test_bit(error, (unsigned long *)sbi->errors))
4091                 return;
4092         schedule_work(&sbi->s_error_work);
4093 }
4094
4095 static bool system_going_down(void)
4096 {
4097         return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
4098                 || system_state == SYSTEM_RESTART;
4099 }
4100
4101 void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
4102                                                         bool irq_context)
4103 {
4104         struct super_block *sb = sbi->sb;
4105         bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
4106         bool continue_fs = !shutdown &&
4107                         F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
4108
4109         set_ckpt_flags(sbi, CP_ERROR_FLAG);
4110
4111         if (!f2fs_hw_is_readonly(sbi)) {
4112                 save_stop_reason(sbi, reason);
4113
4114                 if (irq_context && !shutdown)
4115                         schedule_work(&sbi->s_error_work);
4116                 else
4117                         f2fs_record_stop_reason(sbi);
4118         }
4119
4120         /*
4121          * We force ERRORS_RO behavior when system is rebooting. Otherwise we
4122          * could panic during 'reboot -f' as the underlying device got already
4123          * disabled.
4124          */
4125         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
4126                                 !shutdown && !system_going_down() &&
4127                                 !is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN))
4128                 panic("F2FS-fs (device %s): panic forced after error\n",
4129                                                         sb->s_id);
4130
4131         if (shutdown)
4132                 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
4133
4134         /* continue filesystem operators if errors=continue */
4135         if (continue_fs || f2fs_readonly(sb))
4136                 return;
4137
4138         f2fs_warn(sbi, "Remounting filesystem read-only");
4139         /*
4140          * Make sure updated value of ->s_mount_flags will be visible before
4141          * ->s_flags update
4142          */
4143         smp_wmb();
4144         sb->s_flags |= SB_RDONLY;
4145 }
4146
4147 static void f2fs_record_error_work(struct work_struct *work)
4148 {
4149         struct f2fs_sb_info *sbi = container_of(work,
4150                                         struct f2fs_sb_info, s_error_work);
4151
4152         f2fs_record_stop_reason(sbi);
4153 }
4154
4155 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
4156 {
4157         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4158         unsigned int max_devices = MAX_DEVICES;
4159         unsigned int logical_blksize;
4160         blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
4161         int i;
4162
4163         /* Initialize single device information */
4164         if (!RDEV(0).path[0]) {
4165                 if (!bdev_is_zoned(sbi->sb->s_bdev))
4166                         return 0;
4167                 max_devices = 1;
4168         }
4169
4170         /*
4171          * Initialize multiple devices information, or single
4172          * zoned block device information.
4173          */
4174         sbi->devs = f2fs_kzalloc(sbi,
4175                                  array_size(max_devices,
4176                                             sizeof(struct f2fs_dev_info)),
4177                                  GFP_KERNEL);
4178         if (!sbi->devs)
4179                 return -ENOMEM;
4180
4181         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
4182         sbi->aligned_blksize = true;
4183
4184         for (i = 0; i < max_devices; i++) {
4185                 if (i == 0)
4186                         FDEV(0).bdev_file = sbi->sb->s_bdev_file;
4187                 else if (!RDEV(i).path[0])
4188                         break;
4189
4190                 if (max_devices > 1) {
4191                         /* Multi-device mount */
4192                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
4193                         FDEV(i).total_segments =
4194                                 le32_to_cpu(RDEV(i).total_segments);
4195                         if (i == 0) {
4196                                 FDEV(i).start_blk = 0;
4197                                 FDEV(i).end_blk = FDEV(i).start_blk +
4198                                         SEGS_TO_BLKS(sbi,
4199                                         FDEV(i).total_segments) - 1 +
4200                                         le32_to_cpu(raw_super->segment0_blkaddr);
4201                         } else {
4202                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
4203                                 FDEV(i).end_blk = FDEV(i).start_blk +
4204                                                 SEGS_TO_BLKS(sbi,
4205                                                 FDEV(i).total_segments) - 1;
4206                                 FDEV(i).bdev_file = bdev_file_open_by_path(
4207                                         FDEV(i).path, mode, sbi->sb, NULL);
4208                         }
4209                 }
4210                 if (IS_ERR(FDEV(i).bdev_file))
4211                         return PTR_ERR(FDEV(i).bdev_file);
4212
4213                 FDEV(i).bdev = file_bdev(FDEV(i).bdev_file);
4214                 /* to release errored devices */
4215                 sbi->s_ndevs = i + 1;
4216
4217                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4218                         sbi->aligned_blksize = false;
4219
4220 #ifdef CONFIG_BLK_DEV_ZONED
4221                 if (bdev_is_zoned(FDEV(i).bdev)) {
4222                         if (!f2fs_sb_has_blkzoned(sbi)) {
4223                                 f2fs_err(sbi, "Zoned block device feature not enabled");
4224                                 return -EINVAL;
4225                         }
4226                         if (init_blkz_info(sbi, i)) {
4227                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
4228                                 return -EINVAL;
4229                         }
4230                         if (max_devices == 1)
4231                                 break;
4232                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: Host-managed)",
4233                                   i, FDEV(i).path,
4234                                   FDEV(i).total_segments,
4235                                   FDEV(i).start_blk, FDEV(i).end_blk);
4236                         continue;
4237                 }
4238 #endif
4239                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4240                           i, FDEV(i).path,
4241                           FDEV(i).total_segments,
4242                           FDEV(i).start_blk, FDEV(i).end_blk);
4243         }
4244         return 0;
4245 }
4246
4247 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4248 {
4249 #if IS_ENABLED(CONFIG_UNICODE)
4250         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4251                 const struct f2fs_sb_encodings *encoding_info;
4252                 struct unicode_map *encoding;
4253                 __u16 encoding_flags;
4254
4255                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4256                 if (!encoding_info) {
4257                         f2fs_err(sbi,
4258                                  "Encoding requested by superblock is unknown");
4259                         return -EINVAL;
4260                 }
4261
4262                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4263                 encoding = utf8_load(encoding_info->version);
4264                 if (IS_ERR(encoding)) {
4265                         f2fs_err(sbi,
4266                                  "can't mount with superblock charset: %s-%u.%u.%u "
4267                                  "not supported by the kernel. flags: 0x%x.",
4268                                  encoding_info->name,
4269                                  unicode_major(encoding_info->version),
4270                                  unicode_minor(encoding_info->version),
4271                                  unicode_rev(encoding_info->version),
4272                                  encoding_flags);
4273                         return PTR_ERR(encoding);
4274                 }
4275                 f2fs_info(sbi, "Using encoding defined by superblock: "
4276                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4277                          unicode_major(encoding_info->version),
4278                          unicode_minor(encoding_info->version),
4279                          unicode_rev(encoding_info->version),
4280                          encoding_flags);
4281
4282                 sbi->sb->s_encoding = encoding;
4283                 sbi->sb->s_encoding_flags = encoding_flags;
4284         }
4285 #else
4286         if (f2fs_sb_has_casefold(sbi)) {
4287                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4288                 return -EINVAL;
4289         }
4290 #endif
4291         return 0;
4292 }
4293
4294 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4295 {
4296         /* adjust parameters according to the volume size */
4297         if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4298                 if (f2fs_block_unit_discard(sbi))
4299                         SM_I(sbi)->dcc_info->discard_granularity =
4300                                                 MIN_DISCARD_GRANULARITY;
4301                 if (!f2fs_lfs_mode(sbi))
4302                         SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4303                                                 BIT(F2FS_IPU_HONOR_OPU_WRITE);
4304         }
4305
4306         sbi->readdir_ra = true;
4307 }
4308
4309 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4310 {
4311         struct f2fs_sb_info *sbi;
4312         struct f2fs_super_block *raw_super;
4313         struct inode *root;
4314         int err;
4315         bool skip_recovery = false, need_fsck = false;
4316         char *options = NULL;
4317         int recovery, i, valid_super_block;
4318         struct curseg_info *seg_i;
4319         int retry_cnt = 1;
4320 #ifdef CONFIG_QUOTA
4321         bool quota_enabled = false;
4322 #endif
4323
4324 try_onemore:
4325         err = -EINVAL;
4326         raw_super = NULL;
4327         valid_super_block = -1;
4328         recovery = 0;
4329
4330         /* allocate memory for f2fs-specific super block info */
4331         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4332         if (!sbi)
4333                 return -ENOMEM;
4334
4335         sbi->sb = sb;
4336
4337         /* initialize locks within allocated memory */
4338         init_f2fs_rwsem(&sbi->gc_lock);
4339         mutex_init(&sbi->writepages);
4340         init_f2fs_rwsem(&sbi->cp_global_sem);
4341         init_f2fs_rwsem(&sbi->node_write);
4342         init_f2fs_rwsem(&sbi->node_change);
4343         spin_lock_init(&sbi->stat_lock);
4344         init_f2fs_rwsem(&sbi->cp_rwsem);
4345         init_f2fs_rwsem(&sbi->quota_sem);
4346         init_waitqueue_head(&sbi->cp_wait);
4347         spin_lock_init(&sbi->error_lock);
4348
4349         for (i = 0; i < NR_INODE_TYPE; i++) {
4350                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4351                 spin_lock_init(&sbi->inode_lock[i]);
4352         }
4353         mutex_init(&sbi->flush_lock);
4354
4355         /* Load the checksum driver */
4356         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4357         if (IS_ERR(sbi->s_chksum_driver)) {
4358                 f2fs_err(sbi, "Cannot load crc32 driver.");
4359                 err = PTR_ERR(sbi->s_chksum_driver);
4360                 sbi->s_chksum_driver = NULL;
4361                 goto free_sbi;
4362         }
4363
4364         /* set a block size */
4365         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4366                 f2fs_err(sbi, "unable to set blocksize");
4367                 goto free_sbi;
4368         }
4369
4370         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4371                                                                 &recovery);
4372         if (err)
4373                 goto free_sbi;
4374
4375         sb->s_fs_info = sbi;
4376         sbi->raw_super = raw_super;
4377
4378         INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
4379         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4380         memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
4381
4382         /* precompute checksum seed for metadata */
4383         if (f2fs_sb_has_inode_chksum(sbi))
4384                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4385                                                 sizeof(raw_super->uuid));
4386
4387         default_options(sbi, false);
4388         /* parse mount options */
4389         options = kstrdup((const char *)data, GFP_KERNEL);
4390         if (data && !options) {
4391                 err = -ENOMEM;
4392                 goto free_sb_buf;
4393         }
4394
4395         err = parse_options(sb, options, false);
4396         if (err)
4397                 goto free_options;
4398
4399         sb->s_maxbytes = max_file_blocks(NULL) <<
4400                                 le32_to_cpu(raw_super->log_blocksize);
4401         sb->s_max_links = F2FS_LINK_MAX;
4402
4403         err = f2fs_setup_casefold(sbi);
4404         if (err)
4405                 goto free_options;
4406
4407 #ifdef CONFIG_QUOTA
4408         sb->dq_op = &f2fs_quota_operations;
4409         sb->s_qcop = &f2fs_quotactl_ops;
4410         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4411
4412         if (f2fs_sb_has_quota_ino(sbi)) {
4413                 for (i = 0; i < MAXQUOTAS; i++) {
4414                         if (f2fs_qf_ino(sbi->sb, i))
4415                                 sbi->nquota_files++;
4416                 }
4417         }
4418 #endif
4419
4420         sb->s_op = &f2fs_sops;
4421 #ifdef CONFIG_FS_ENCRYPTION
4422         sb->s_cop = &f2fs_cryptops;
4423 #endif
4424 #ifdef CONFIG_FS_VERITY
4425         sb->s_vop = &f2fs_verityops;
4426 #endif
4427         sb->s_xattr = f2fs_xattr_handlers;
4428         sb->s_export_op = &f2fs_export_ops;
4429         sb->s_magic = F2FS_SUPER_MAGIC;
4430         sb->s_time_gran = 1;
4431         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4432                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4433         super_set_uuid(sb, (void *) raw_super->uuid, sizeof(raw_super->uuid));
4434         sb->s_iflags |= SB_I_CGROUPWB;
4435
4436         /* init f2fs-specific super block info */
4437         sbi->valid_super_block = valid_super_block;
4438
4439         /* disallow all the data/node/meta page writes */
4440         set_sbi_flag(sbi, SBI_POR_DOING);
4441
4442         err = f2fs_init_write_merge_io(sbi);
4443         if (err)
4444                 goto free_bio_info;
4445
4446         init_sb_info(sbi);
4447
4448         err = f2fs_init_iostat(sbi);
4449         if (err)
4450                 goto free_bio_info;
4451
4452         err = init_percpu_info(sbi);
4453         if (err)
4454                 goto free_iostat;
4455
4456         /* init per sbi slab cache */
4457         err = f2fs_init_xattr_caches(sbi);
4458         if (err)
4459                 goto free_percpu;
4460         err = f2fs_init_page_array_cache(sbi);
4461         if (err)
4462                 goto free_xattr_cache;
4463
4464         /* get an inode for meta space */
4465         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4466         if (IS_ERR(sbi->meta_inode)) {
4467                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4468                 err = PTR_ERR(sbi->meta_inode);
4469                 goto free_page_array_cache;
4470         }
4471
4472         err = f2fs_get_valid_checkpoint(sbi);
4473         if (err) {
4474                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4475                 goto free_meta_inode;
4476         }
4477
4478         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4479                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4480         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4481                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4482                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4483         }
4484
4485         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4486                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4487
4488         /* Initialize device list */
4489         err = f2fs_scan_devices(sbi);
4490         if (err) {
4491                 f2fs_err(sbi, "Failed to find devices");
4492                 goto free_devices;
4493         }
4494
4495         err = f2fs_init_post_read_wq(sbi);
4496         if (err) {
4497                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4498                 goto free_devices;
4499         }
4500
4501         sbi->total_valid_node_count =
4502                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4503         percpu_counter_set(&sbi->total_valid_inode_count,
4504                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4505         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4506         sbi->total_valid_block_count =
4507                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4508         sbi->last_valid_block_count = sbi->total_valid_block_count;
4509         sbi->reserved_blocks = 0;
4510         sbi->current_reserved_blocks = 0;
4511         limit_reserve_root(sbi);
4512         adjust_unusable_cap_perc(sbi);
4513
4514         f2fs_init_extent_cache_info(sbi);
4515
4516         f2fs_init_ino_entry_info(sbi);
4517
4518         f2fs_init_fsync_node_info(sbi);
4519
4520         /* setup checkpoint request control and start checkpoint issue thread */
4521         f2fs_init_ckpt_req_control(sbi);
4522         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4523                         test_opt(sbi, MERGE_CHECKPOINT)) {
4524                 err = f2fs_start_ckpt_thread(sbi);
4525                 if (err) {
4526                         f2fs_err(sbi,
4527                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4528                             err);
4529                         goto stop_ckpt_thread;
4530                 }
4531         }
4532
4533         /* setup f2fs internal modules */
4534         err = f2fs_build_segment_manager(sbi);
4535         if (err) {
4536                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4537                          err);
4538                 goto free_sm;
4539         }
4540         err = f2fs_build_node_manager(sbi);
4541         if (err) {
4542                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4543                          err);
4544                 goto free_nm;
4545         }
4546
4547         /* For write statistics */
4548         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4549
4550         /* Read accumulated write IO statistics if exists */
4551         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4552         if (__exist_node_summaries(sbi))
4553                 sbi->kbytes_written =
4554                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4555
4556         f2fs_build_gc_manager(sbi);
4557
4558         err = f2fs_build_stats(sbi);
4559         if (err)
4560                 goto free_nm;
4561
4562         /* get an inode for node space */
4563         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4564         if (IS_ERR(sbi->node_inode)) {
4565                 f2fs_err(sbi, "Failed to read node inode");
4566                 err = PTR_ERR(sbi->node_inode);
4567                 goto free_stats;
4568         }
4569
4570         /* read root inode and dentry */
4571         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4572         if (IS_ERR(root)) {
4573                 f2fs_err(sbi, "Failed to read root inode");
4574                 err = PTR_ERR(root);
4575                 goto free_node_inode;
4576         }
4577         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4578                         !root->i_size || !root->i_nlink) {
4579                 iput(root);
4580                 err = -EINVAL;
4581                 goto free_node_inode;
4582         }
4583
4584         generic_set_sb_d_ops(sb);
4585         sb->s_root = d_make_root(root); /* allocate root dentry */
4586         if (!sb->s_root) {
4587                 err = -ENOMEM;
4588                 goto free_node_inode;
4589         }
4590
4591         err = f2fs_init_compress_inode(sbi);
4592         if (err)
4593                 goto free_root_inode;
4594
4595         err = f2fs_register_sysfs(sbi);
4596         if (err)
4597                 goto free_compress_inode;
4598
4599 #ifdef CONFIG_QUOTA
4600         /* Enable quota usage during mount */
4601         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4602                 err = f2fs_enable_quotas(sb);
4603                 if (err)
4604                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4605         }
4606
4607         quota_enabled = f2fs_recover_quota_begin(sbi);
4608 #endif
4609         /* if there are any orphan inodes, free them */
4610         err = f2fs_recover_orphan_inodes(sbi);
4611         if (err)
4612                 goto free_meta;
4613
4614         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4615                 goto reset_checkpoint;
4616
4617         /* recover fsynced data */
4618         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4619                         !test_opt(sbi, NORECOVERY)) {
4620                 /*
4621                  * mount should be failed, when device has readonly mode, and
4622                  * previous checkpoint was not done by clean system shutdown.
4623                  */
4624                 if (f2fs_hw_is_readonly(sbi)) {
4625                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4626                                 err = f2fs_recover_fsync_data(sbi, true);
4627                                 if (err > 0) {
4628                                         err = -EROFS;
4629                                         f2fs_err(sbi, "Need to recover fsync data, but "
4630                                                 "write access unavailable, please try "
4631                                                 "mount w/ disable_roll_forward or norecovery");
4632                                 }
4633                                 if (err < 0)
4634                                         goto free_meta;
4635                         }
4636                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4637                         goto reset_checkpoint;
4638                 }
4639
4640                 if (need_fsck)
4641                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4642
4643                 if (skip_recovery)
4644                         goto reset_checkpoint;
4645
4646                 err = f2fs_recover_fsync_data(sbi, false);
4647                 if (err < 0) {
4648                         if (err != -ENOMEM)
4649                                 skip_recovery = true;
4650                         need_fsck = true;
4651                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4652                                  err);
4653                         goto free_meta;
4654                 }
4655         } else {
4656                 err = f2fs_recover_fsync_data(sbi, true);
4657
4658                 if (!f2fs_readonly(sb) && err > 0) {
4659                         err = -EINVAL;
4660                         f2fs_err(sbi, "Need to recover fsync data");
4661                         goto free_meta;
4662                 }
4663         }
4664
4665 #ifdef CONFIG_QUOTA
4666         f2fs_recover_quota_end(sbi, quota_enabled);
4667 #endif
4668 reset_checkpoint:
4669         /*
4670          * If the f2fs is not readonly and fsync data recovery succeeds,
4671          * check zoned block devices' write pointer consistency.
4672          */
4673         if (f2fs_sb_has_blkzoned(sbi) && !f2fs_readonly(sb)) {
4674                 int err2;
4675
4676                 f2fs_notice(sbi, "Checking entire write pointers");
4677                 err2 = f2fs_check_write_pointer(sbi);
4678                 if (err2)
4679                         err = err2;
4680         }
4681         if (err)
4682                 goto free_meta;
4683
4684         err = f2fs_init_inmem_curseg(sbi);
4685         if (err)
4686                 goto sync_free_meta;
4687
4688         /* f2fs_recover_fsync_data() cleared this already */
4689         clear_sbi_flag(sbi, SBI_POR_DOING);
4690
4691         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4692                 err = f2fs_disable_checkpoint(sbi);
4693                 if (err)
4694                         goto sync_free_meta;
4695         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4696                 f2fs_enable_checkpoint(sbi);
4697         }
4698
4699         /*
4700          * If filesystem is not mounted as read-only then
4701          * do start the gc_thread.
4702          */
4703         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4704                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4705                 /* After POR, we can run background GC thread.*/
4706                 err = f2fs_start_gc_thread(sbi);
4707                 if (err)
4708                         goto sync_free_meta;
4709         }
4710         kvfree(options);
4711
4712         /* recover broken superblock */
4713         if (recovery) {
4714                 err = f2fs_commit_super(sbi, true);
4715                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4716                           sbi->valid_super_block ? 1 : 2, err);
4717         }
4718
4719         f2fs_join_shrinker(sbi);
4720
4721         f2fs_tuning_parameters(sbi);
4722
4723         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4724                     cur_cp_version(F2FS_CKPT(sbi)));
4725         f2fs_update_time(sbi, CP_TIME);
4726         f2fs_update_time(sbi, REQ_TIME);
4727         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4728         return 0;
4729
4730 sync_free_meta:
4731         /* safe to flush all the data */
4732         sync_filesystem(sbi->sb);
4733         retry_cnt = 0;
4734
4735 free_meta:
4736 #ifdef CONFIG_QUOTA
4737         f2fs_truncate_quota_inode_pages(sb);
4738         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4739                 f2fs_quota_off_umount(sbi->sb);
4740 #endif
4741         /*
4742          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4743          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4744          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4745          * falls into an infinite loop in f2fs_sync_meta_pages().
4746          */
4747         truncate_inode_pages_final(META_MAPPING(sbi));
4748         /* evict some inodes being cached by GC */
4749         evict_inodes(sb);
4750         f2fs_unregister_sysfs(sbi);
4751 free_compress_inode:
4752         f2fs_destroy_compress_inode(sbi);
4753 free_root_inode:
4754         dput(sb->s_root);
4755         sb->s_root = NULL;
4756 free_node_inode:
4757         f2fs_release_ino_entry(sbi, true);
4758         truncate_inode_pages_final(NODE_MAPPING(sbi));
4759         iput(sbi->node_inode);
4760         sbi->node_inode = NULL;
4761 free_stats:
4762         f2fs_destroy_stats(sbi);
4763 free_nm:
4764         /* stop discard thread before destroying node manager */
4765         f2fs_stop_discard_thread(sbi);
4766         f2fs_destroy_node_manager(sbi);
4767 free_sm:
4768         f2fs_destroy_segment_manager(sbi);
4769 stop_ckpt_thread:
4770         f2fs_stop_ckpt_thread(sbi);
4771         /* flush s_error_work before sbi destroy */
4772         flush_work(&sbi->s_error_work);
4773         f2fs_destroy_post_read_wq(sbi);
4774 free_devices:
4775         destroy_device_list(sbi);
4776         kvfree(sbi->ckpt);
4777 free_meta_inode:
4778         make_bad_inode(sbi->meta_inode);
4779         iput(sbi->meta_inode);
4780         sbi->meta_inode = NULL;
4781 free_page_array_cache:
4782         f2fs_destroy_page_array_cache(sbi);
4783 free_xattr_cache:
4784         f2fs_destroy_xattr_caches(sbi);
4785 free_percpu:
4786         destroy_percpu_info(sbi);
4787 free_iostat:
4788         f2fs_destroy_iostat(sbi);
4789 free_bio_info:
4790         for (i = 0; i < NR_PAGE_TYPE; i++)
4791                 kvfree(sbi->write_io[i]);
4792
4793 #if IS_ENABLED(CONFIG_UNICODE)
4794         utf8_unload(sb->s_encoding);
4795         sb->s_encoding = NULL;
4796 #endif
4797 free_options:
4798 #ifdef CONFIG_QUOTA
4799         for (i = 0; i < MAXQUOTAS; i++)
4800                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4801 #endif
4802         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4803         kvfree(options);
4804 free_sb_buf:
4805         kfree(raw_super);
4806 free_sbi:
4807         if (sbi->s_chksum_driver)
4808                 crypto_free_shash(sbi->s_chksum_driver);
4809         kfree(sbi);
4810         sb->s_fs_info = NULL;
4811
4812         /* give only one another chance */
4813         if (retry_cnt > 0 && skip_recovery) {
4814                 retry_cnt--;
4815                 shrink_dcache_sb(sb);
4816                 goto try_onemore;
4817         }
4818         return err;
4819 }
4820
4821 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4822                         const char *dev_name, void *data)
4823 {
4824         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4825 }
4826
4827 static void kill_f2fs_super(struct super_block *sb)
4828 {
4829         struct f2fs_sb_info *sbi = F2FS_SB(sb);
4830
4831         if (sb->s_root) {
4832                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4833                 f2fs_stop_gc_thread(sbi);
4834                 f2fs_stop_discard_thread(sbi);
4835
4836 #ifdef CONFIG_F2FS_FS_COMPRESSION
4837                 /*
4838                  * latter evict_inode() can bypass checking and invalidating
4839                  * compress inode cache.
4840                  */
4841                 if (test_opt(sbi, COMPRESS_CACHE))
4842                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4843 #endif
4844
4845                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4846                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4847                         struct cp_control cpc = {
4848                                 .reason = CP_UMOUNT,
4849                         };
4850                         stat_inc_cp_call_count(sbi, TOTAL_CALL);
4851                         f2fs_write_checkpoint(sbi, &cpc);
4852                 }
4853
4854                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4855                         sb->s_flags &= ~SB_RDONLY;
4856         }
4857         kill_block_super(sb);
4858         /* Release block devices last, after fscrypt_destroy_keyring(). */
4859         if (sbi) {
4860                 destroy_device_list(sbi);
4861                 kfree(sbi);
4862                 sb->s_fs_info = NULL;
4863         }
4864 }
4865
4866 static struct file_system_type f2fs_fs_type = {
4867         .owner          = THIS_MODULE,
4868         .name           = "f2fs",
4869         .mount          = f2fs_mount,
4870         .kill_sb        = kill_f2fs_super,
4871         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4872 };
4873 MODULE_ALIAS_FS("f2fs");
4874
4875 static int __init init_inodecache(void)
4876 {
4877         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4878                         sizeof(struct f2fs_inode_info), 0,
4879                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4880         return f2fs_inode_cachep ? 0 : -ENOMEM;
4881 }
4882
4883 static void destroy_inodecache(void)
4884 {
4885         /*
4886          * Make sure all delayed rcu free inodes are flushed before we
4887          * destroy cache.
4888          */
4889         rcu_barrier();
4890         kmem_cache_destroy(f2fs_inode_cachep);
4891 }
4892
4893 static int __init init_f2fs_fs(void)
4894 {
4895         int err;
4896
4897         if (PAGE_SIZE != F2FS_BLKSIZE) {
4898                 printk("F2FS not supported on PAGE_SIZE(%lu) != BLOCK_SIZE(%lu)\n",
4899                                 PAGE_SIZE, F2FS_BLKSIZE);
4900                 return -EINVAL;
4901         }
4902
4903         err = init_inodecache();
4904         if (err)
4905                 goto fail;
4906         err = f2fs_create_node_manager_caches();
4907         if (err)
4908                 goto free_inodecache;
4909         err = f2fs_create_segment_manager_caches();
4910         if (err)
4911                 goto free_node_manager_caches;
4912         err = f2fs_create_checkpoint_caches();
4913         if (err)
4914                 goto free_segment_manager_caches;
4915         err = f2fs_create_recovery_cache();
4916         if (err)
4917                 goto free_checkpoint_caches;
4918         err = f2fs_create_extent_cache();
4919         if (err)
4920                 goto free_recovery_cache;
4921         err = f2fs_create_garbage_collection_cache();
4922         if (err)
4923                 goto free_extent_cache;
4924         err = f2fs_init_sysfs();
4925         if (err)
4926                 goto free_garbage_collection_cache;
4927         err = f2fs_init_shrinker();
4928         if (err)
4929                 goto free_sysfs;
4930         err = register_filesystem(&f2fs_fs_type);
4931         if (err)
4932                 goto free_shrinker;
4933         f2fs_create_root_stats();
4934         err = f2fs_init_post_read_processing();
4935         if (err)
4936                 goto free_root_stats;
4937         err = f2fs_init_iostat_processing();
4938         if (err)
4939                 goto free_post_read;
4940         err = f2fs_init_bio_entry_cache();
4941         if (err)
4942                 goto free_iostat;
4943         err = f2fs_init_bioset();
4944         if (err)
4945                 goto free_bio_entry_cache;
4946         err = f2fs_init_compress_mempool();
4947         if (err)
4948                 goto free_bioset;
4949         err = f2fs_init_compress_cache();
4950         if (err)
4951                 goto free_compress_mempool;
4952         err = f2fs_create_casefold_cache();
4953         if (err)
4954                 goto free_compress_cache;
4955         return 0;
4956 free_compress_cache:
4957         f2fs_destroy_compress_cache();
4958 free_compress_mempool:
4959         f2fs_destroy_compress_mempool();
4960 free_bioset:
4961         f2fs_destroy_bioset();
4962 free_bio_entry_cache:
4963         f2fs_destroy_bio_entry_cache();
4964 free_iostat:
4965         f2fs_destroy_iostat_processing();
4966 free_post_read:
4967         f2fs_destroy_post_read_processing();
4968 free_root_stats:
4969         f2fs_destroy_root_stats();
4970         unregister_filesystem(&f2fs_fs_type);
4971 free_shrinker:
4972         f2fs_exit_shrinker();
4973 free_sysfs:
4974         f2fs_exit_sysfs();
4975 free_garbage_collection_cache:
4976         f2fs_destroy_garbage_collection_cache();
4977 free_extent_cache:
4978         f2fs_destroy_extent_cache();
4979 free_recovery_cache:
4980         f2fs_destroy_recovery_cache();
4981 free_checkpoint_caches:
4982         f2fs_destroy_checkpoint_caches();
4983 free_segment_manager_caches:
4984         f2fs_destroy_segment_manager_caches();
4985 free_node_manager_caches:
4986         f2fs_destroy_node_manager_caches();
4987 free_inodecache:
4988         destroy_inodecache();
4989 fail:
4990         return err;
4991 }
4992
4993 static void __exit exit_f2fs_fs(void)
4994 {
4995         f2fs_destroy_casefold_cache();
4996         f2fs_destroy_compress_cache();
4997         f2fs_destroy_compress_mempool();
4998         f2fs_destroy_bioset();
4999         f2fs_destroy_bio_entry_cache();
5000         f2fs_destroy_iostat_processing();
5001         f2fs_destroy_post_read_processing();
5002         f2fs_destroy_root_stats();
5003         unregister_filesystem(&f2fs_fs_type);
5004         f2fs_exit_shrinker();
5005         f2fs_exit_sysfs();
5006         f2fs_destroy_garbage_collection_cache();
5007         f2fs_destroy_extent_cache();
5008         f2fs_destroy_recovery_cache();
5009         f2fs_destroy_checkpoint_caches();
5010         f2fs_destroy_segment_manager_caches();
5011         f2fs_destroy_node_manager_caches();
5012         destroy_inodecache();
5013 }
5014
5015 module_init(init_f2fs_fs)
5016 module_exit(exit_f2fs_fs)
5017
5018 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
5019 MODULE_DESCRIPTION("Flash Friendly File System");
5020 MODULE_LICENSE("GPL");
5021 MODULE_SOFTDEP("pre: crc32");
5022