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]         = "invalid blkaddr",
  65 };
  66
  67 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  68                                                         unsigned int type)
  69 {
  70         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  71
  72         if (rate) {
  73                 atomic_set(&ffi->inject_ops, 0);
  74                 ffi->inject_rate = rate;
  75         }
  76
  77         if (type)
  78                 ffi->inject_type = type;
  79
  80         if (!rate && !type)
  81                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  82 }
  83 #endif
  84
  85 /* f2fs-wide shrinker description */
  86 static struct shrinker *f2fs_shrinker_info;
  87
  88 static int __init f2fs_init_shrinker(void)
  89 {
  90         f2fs_shrinker_info = shrinker_alloc(0, "f2fs-shrinker");
  91         if (!f2fs_shrinker_info)
  92                 return -ENOMEM;
  93
  94         f2fs_shrinker_info->count_objects = f2fs_shrink_count;
  95         f2fs_shrinker_info->scan_objects = f2fs_shrink_scan;
  96
  97         shrinker_register(f2fs_shrinker_info);
  98
  99         return 0;
 100 }
 101
 102 static void f2fs_exit_shrinker(void)
 103 {
 104         shrinker_free(f2fs_shrinker_info);
 105 }
 106
 107 enum {
 108         Opt_gc_background,
 109         Opt_disable_roll_forward,
 110         Opt_norecovery,
 111         Opt_discard,
 112         Opt_nodiscard,
 113         Opt_noheap,
 114         Opt_heap,
 115         Opt_user_xattr,
 116         Opt_nouser_xattr,
 117         Opt_acl,
 118         Opt_noacl,
 119         Opt_active_logs,
 120         Opt_disable_ext_identify,
 121         Opt_inline_xattr,
 122         Opt_noinline_xattr,
 123         Opt_inline_xattr_size,
 124         Opt_inline_data,
 125         Opt_inline_dentry,
 126         Opt_noinline_dentry,
 127         Opt_flush_merge,
 128         Opt_noflush_merge,
 129         Opt_barrier,
 130         Opt_nobarrier,
 131         Opt_fastboot,
 132         Opt_extent_cache,
 133         Opt_noextent_cache,
 134         Opt_noinline_data,
 135         Opt_data_flush,
 136         Opt_reserve_root,
 137         Opt_resgid,
 138         Opt_resuid,
 139         Opt_mode,
 140         Opt_io_size_bits,
 141         Opt_fault_injection,
 142         Opt_fault_type,
 143         Opt_lazytime,
 144         Opt_nolazytime,
 145         Opt_quota,
 146         Opt_noquota,
 147         Opt_usrquota,
 148         Opt_grpquota,
 149         Opt_prjquota,
 150         Opt_usrjquota,
 151         Opt_grpjquota,
 152         Opt_prjjquota,
 153         Opt_offusrjquota,
 154         Opt_offgrpjquota,
 155         Opt_offprjjquota,
 156         Opt_jqfmt_vfsold,
 157         Opt_jqfmt_vfsv0,
 158         Opt_jqfmt_vfsv1,
 159         Opt_alloc,
 160         Opt_fsync,
 161         Opt_test_dummy_encryption,
 162         Opt_inlinecrypt,
 163         Opt_checkpoint_disable,
 164         Opt_checkpoint_disable_cap,
 165         Opt_checkpoint_disable_cap_perc,
 166         Opt_checkpoint_enable,
 167         Opt_checkpoint_merge,
 168         Opt_nocheckpoint_merge,
 169         Opt_compress_algorithm,
 170         Opt_compress_log_size,
 171         Opt_compress_extension,
 172         Opt_nocompress_extension,
 173         Opt_compress_chksum,
 174         Opt_compress_mode,
 175         Opt_compress_cache,
 176         Opt_atgc,
 177         Opt_gc_merge,
 178         Opt_nogc_merge,
 179         Opt_discard_unit,
 180         Opt_memory_mode,
 181         Opt_age_extent_cache,
 182         Opt_errors,
 183         Opt_err,
 184 };
 185
 186 static match_table_t f2fs_tokens = {
 187         {Opt_gc_background, "background_gc=%s"},
 188         {Opt_disable_roll_forward, "disable_roll_forward"},
 189         {Opt_norecovery, "norecovery"},
 190         {Opt_discard, "discard"},
 191         {Opt_nodiscard, "nodiscard"},
 192         {Opt_noheap, "no_heap"},
 193         {Opt_heap, "heap"},
 194         {Opt_user_xattr, "user_xattr"},
 195         {Opt_nouser_xattr, "nouser_xattr"},
 196         {Opt_acl, "acl"},
 197         {Opt_noacl, "noacl"},
 198         {Opt_active_logs, "active_logs=%u"},
 199         {Opt_disable_ext_identify, "disable_ext_identify"},
 200         {Opt_inline_xattr, "inline_xattr"},
 201         {Opt_noinline_xattr, "noinline_xattr"},
 202         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 203         {Opt_inline_data, "inline_data"},
 204         {Opt_inline_dentry, "inline_dentry"},
 205         {Opt_noinline_dentry, "noinline_dentry"},
 206         {Opt_flush_merge, "flush_merge"},
 207         {Opt_noflush_merge, "noflush_merge"},
 208         {Opt_barrier, "barrier"},
 209         {Opt_nobarrier, "nobarrier"},
 210         {Opt_fastboot, "fastboot"},
 211         {Opt_extent_cache, "extent_cache"},
 212         {Opt_noextent_cache, "noextent_cache"},
 213         {Opt_noinline_data, "noinline_data"},
 214         {Opt_data_flush, "data_flush"},
 215         {Opt_reserve_root, "reserve_root=%u"},
 216         {Opt_resgid, "resgid=%u"},
 217         {Opt_resuid, "resuid=%u"},
 218         {Opt_mode, "mode=%s"},
 219         {Opt_io_size_bits, "io_bits=%u"},
 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, const char *fmt, ...)
 267 {
 268         struct va_format vaf;
 269         va_list args;
 270         int level;
 271
 272         va_start(args, fmt);
 273
 274         level = printk_get_level(fmt);
 275         vaf.fmt = printk_skip_level(fmt);
 276         vaf.va = &args;
 277         printk("%c%cF2FS-fs (%s): %pV\n",
 278                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 279
 280         va_end(args);
 281 }
 282
 283 #if IS_ENABLED(CONFIG_UNICODE)
 284 static const struct f2fs_sb_encodings {
 285         __u16 magic;
 286         char *name;
 287         unsigned int version;
 288 } f2fs_sb_encoding_map[] = {
 289         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 290 };
 291
 292 static const struct f2fs_sb_encodings *
 293 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 294 {
 295         __u16 magic = le16_to_cpu(sb->s_encoding);
 296         int i;
 297
 298         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 299                 if (magic == f2fs_sb_encoding_map[i].magic)
 300                         return &f2fs_sb_encoding_map[i];
 301
 302         return NULL;
 303 }
 304
 305 struct kmem_cache *f2fs_cf_name_slab;
 306 static int __init f2fs_create_casefold_cache(void)
 307 {
 308         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 309                                                         F2FS_NAME_LEN);
 310         return f2fs_cf_name_slab ? 0 : -ENOMEM;
 311 }
 312
 313 static void f2fs_destroy_casefold_cache(void)
 314 {
 315         kmem_cache_destroy(f2fs_cf_name_slab);
 316 }
 317 #else
 318 static int __init f2fs_create_casefold_cache(void) { return 0; }
 319 static void f2fs_destroy_casefold_cache(void) { }
 320 #endif
 321
 322 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 323 {
 324         block_t limit = min((sbi->user_block_count >> 3),
 325                         sbi->user_block_count - sbi->reserved_blocks);
 326
 327         /* limit is 12.5% */
 328         if (test_opt(sbi, RESERVE_ROOT) &&
 329                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 330                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 331                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 332                           F2FS_OPTION(sbi).root_reserved_blocks);
 333         }
 334         if (!test_opt(sbi, RESERVE_ROOT) &&
 335                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 336                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 337                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 338                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 339                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 340                           from_kuid_munged(&init_user_ns,
 341                                            F2FS_OPTION(sbi).s_resuid),
 342                           from_kgid_munged(&init_user_ns,
 343                                            F2FS_OPTION(sbi).s_resgid));
 344 }
 345
 346 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 347 {
 348         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 349         unsigned int avg_vblocks;
 350         unsigned int wanted_reserved_segments;
 351         block_t avail_user_block_count;
 352
 353         if (!F2FS_IO_ALIGNED(sbi))
 354                 return 0;
 355
 356         /* average valid block count in section in worst case */
 357         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 358
 359         /*
 360          * we need enough free space when migrating one section in worst case
 361          */
 362         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 363                                                 reserved_segments(sbi);
 364         wanted_reserved_segments -= reserved_segments(sbi);
 365
 366         avail_user_block_count = sbi->user_block_count -
 367                                 sbi->current_reserved_blocks -
 368                                 F2FS_OPTION(sbi).root_reserved_blocks;
 369
 370         if (wanted_reserved_segments * sbi->blocks_per_seg >
 371                                         avail_user_block_count) {
 372                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 373                         wanted_reserved_segments,
 374                         avail_user_block_count >> sbi->log_blocks_per_seg);
 375                 return -ENOSPC;
 376         }
 377
 378         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 379
 380         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 381                          wanted_reserved_segments);
 382
 383         return 0;
 384 }
 385
 386 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 387 {
 388         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 389                 return;
 390
 391         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 392                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 393         else
 394                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 395                                         F2FS_OPTION(sbi).unusable_cap_perc;
 396
 397         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 398                         F2FS_OPTION(sbi).unusable_cap,
 399                         F2FS_OPTION(sbi).unusable_cap_perc);
 400 }
 401
 402 static void init_once(void *foo)
 403 {
 404         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 405
 406         inode_init_once(&fi->vfs_inode);
 407 }
 408
 409 #ifdef CONFIG_QUOTA
 410 static const char * const quotatypes[] = INITQFNAMES;
 411 #define QTYPE2NAME(t) (quotatypes[t])
 412 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 413                                                         substring_t *args)
 414 {
 415         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 416         char *qname;
 417         int ret = -EINVAL;
 418
 419         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 420                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 421                 return -EINVAL;
 422         }
 423         if (f2fs_sb_has_quota_ino(sbi)) {
 424                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 425                 return 0;
 426         }
 427
 428         qname = match_strdup(args);
 429         if (!qname) {
 430                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 431                 return -ENOMEM;
 432         }
 433         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 434                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 435                         ret = 0;
 436                 else
 437                         f2fs_err(sbi, "%s quota file already specified",
 438                                  QTYPE2NAME(qtype));
 439                 goto errout;
 440         }
 441         if (strchr(qname, '/')) {
 442                 f2fs_err(sbi, "quotafile must be on filesystem root");
 443                 goto errout;
 444         }
 445         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 446         set_opt(sbi, QUOTA);
 447         return 0;
 448 errout:
 449         kfree(qname);
 450         return ret;
 451 }
 452
 453 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 454 {
 455         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 456
 457         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 458                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 459                 return -EINVAL;
 460         }
 461         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 462         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 463         return 0;
 464 }
 465
 466 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 467 {
 468         /*
 469          * We do the test below only for project quotas. 'usrquota' and
 470          * 'grpquota' mount options are allowed even without quota feature
 471          * to support legacy quotas in quota files.
 472          */
 473         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 474                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 475                 return -1;
 476         }
 477         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 478                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 479                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 480                 if (test_opt(sbi, USRQUOTA) &&
 481                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 482                         clear_opt(sbi, USRQUOTA);
 483
 484                 if (test_opt(sbi, GRPQUOTA) &&
 485                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 486                         clear_opt(sbi, GRPQUOTA);
 487
 488                 if (test_opt(sbi, PRJQUOTA) &&
 489                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 490                         clear_opt(sbi, PRJQUOTA);
 491
 492                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 493                                 test_opt(sbi, PRJQUOTA)) {
 494                         f2fs_err(sbi, "old and new quota format mixing");
 495                         return -1;
 496                 }
 497
 498                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 499                         f2fs_err(sbi, "journaled quota format not specified");
 500                         return -1;
 501                 }
 502         }
 503
 504         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 505                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 506                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 507         }
 508         return 0;
 509 }
 510 #endif
 511
 512 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 513                                           const char *opt,
 514                                           const substring_t *arg,
 515                                           bool is_remount)
 516 {
 517         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 518         struct fs_parameter param = {
 519                 .type = fs_value_is_string,
 520                 .string = arg->from ? arg->from : "",
 521         };
 522         struct fscrypt_dummy_policy *policy =
 523                 &F2FS_OPTION(sbi).dummy_enc_policy;
 524         int err;
 525
 526         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 527                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 528                 return -EINVAL;
 529         }
 530
 531         if (!f2fs_sb_has_encrypt(sbi)) {
 532                 f2fs_err(sbi, "Encrypt feature is off");
 533                 return -EINVAL;
 534         }
 535
 536         /*
 537          * This mount option is just for testing, and it's not worthwhile to
 538          * implement the extra complexity (e.g. RCU protection) that would be
 539          * needed to allow it to be set or changed during remount.  We do allow
 540          * it to be specified during remount, but only if there is no change.
 541          */
 542         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 543                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 544                 return -EINVAL;
 545         }
 546
 547         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 548         if (err) {
 549                 if (err == -EEXIST)
 550                         f2fs_warn(sbi,
 551                                   "Can't change test_dummy_encryption on remount");
 552                 else if (err == -EINVAL)
 553                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 554                                   opt);
 555                 else
 556                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 557                                   opt, err);
 558                 return -EINVAL;
 559         }
 560         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 561         return 0;
 562 }
 563
 564 #ifdef CONFIG_F2FS_FS_COMPRESSION
 565 static bool is_compress_extension_exist(struct f2fs_sb_info *sbi,
 566                                         const char *new_ext, bool is_ext)
 567 {
 568         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 569         int ext_cnt;
 570         int i;
 571
 572         if (is_ext) {
 573                 ext = F2FS_OPTION(sbi).extensions;
 574                 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 575         } else {
 576                 ext = F2FS_OPTION(sbi).noextensions;
 577                 ext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 578         }
 579
 580         for (i = 0; i < ext_cnt; i++) {
 581                 if (!strcasecmp(new_ext, ext[i]))
 582                         return true;
 583         }
 584
 585         return false;
 586 }
 587
 588 /*
 589  * 1. The same extension name cannot not appear in both compress and non-compress extension
 590  * at the same time.
 591  * 2. If the compress extension specifies all files, the types specified by the non-compress
 592  * extension will be treated as special cases and will not be compressed.
 593  * 3. Don't allow the non-compress extension specifies all files.
 594  */
 595 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 596 {
 597         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 598         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 599         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 600
 601         ext = F2FS_OPTION(sbi).extensions;
 602         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 603         noext = F2FS_OPTION(sbi).noextensions;
 604         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 605
 606         if (!noext_cnt)
 607                 return 0;
 608
 609         for (no_index = 0; no_index < noext_cnt; no_index++) {
 610                 if (!strcasecmp("*", noext[no_index])) {
 611                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 612                         return -EINVAL;
 613                 }
 614                 for (index = 0; index < ext_cnt; index++) {
 615                         if (!strcasecmp(ext[index], noext[no_index])) {
 616                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 617                                                 ext[index]);
 618                                 return -EINVAL;
 619                         }
 620                 }
 621         }
 622         return 0;
 623 }
 624
 625 #ifdef CONFIG_F2FS_FS_LZ4
 626 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 627 {
 628 #ifdef CONFIG_F2FS_FS_LZ4HC
 629         unsigned int level;
 630
 631         if (strlen(str) == 3) {
 632                 F2FS_OPTION(sbi).compress_level = 0;
 633                 return 0;
 634         }
 635
 636         str += 3;
 637
 638         if (str[0] != ':') {
 639                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 640                 return -EINVAL;
 641         }
 642         if (kstrtouint(str + 1, 10, &level))
 643                 return -EINVAL;
 644
 645         if (!f2fs_is_compress_level_valid(COMPRESS_LZ4, level)) {
 646                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 647                 return -EINVAL;
 648         }
 649
 650         F2FS_OPTION(sbi).compress_level = level;
 651         return 0;
 652 #else
 653         if (strlen(str) == 3) {
 654                 F2FS_OPTION(sbi).compress_level = 0;
 655                 return 0;
 656         }
 657         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 658         return -EINVAL;
 659 #endif
 660 }
 661 #endif
 662
 663 #ifdef CONFIG_F2FS_FS_ZSTD
 664 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 665 {
 666         unsigned int level;
 667         int len = 4;
 668
 669         if (strlen(str) == len) {
 670                 F2FS_OPTION(sbi).compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
 671                 return 0;
 672         }
 673
 674         str += len;
 675
 676         if (str[0] != ':') {
 677                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 678                 return -EINVAL;
 679         }
 680         if (kstrtouint(str + 1, 10, &level))
 681                 return -EINVAL;
 682
 683         if (!f2fs_is_compress_level_valid(COMPRESS_ZSTD, level)) {
 684                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 685                 return -EINVAL;
 686         }
 687
 688         F2FS_OPTION(sbi).compress_level = level;
 689         return 0;
 690 }
 691 #endif
 692 #endif
 693
 694 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 695 {
 696         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 697         substring_t args[MAX_OPT_ARGS];
 698 #ifdef CONFIG_F2FS_FS_COMPRESSION
 699         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 700         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 701         int ext_cnt, noext_cnt;
 702 #endif
 703         char *p, *name;
 704         int arg = 0;
 705         kuid_t uid;
 706         kgid_t gid;
 707         int ret;
 708
 709         if (!options)
 710                 goto default_check;
 711
 712         while ((p = strsep(&options, ",")) != NULL) {
 713                 int token;
 714
 715                 if (!*p)
 716                         continue;
 717                 /*
 718                  * Initialize args struct so we know whether arg was
 719                  * found; some options take optional arguments.
 720                  */
 721                 args[0].to = args[0].from = NULL;
 722                 token = match_token(p, f2fs_tokens, args);
 723
 724                 switch (token) {
 725                 case Opt_gc_background:
 726                         name = match_strdup(&args[0]);
 727
 728                         if (!name)
 729                                 return -ENOMEM;
 730                         if (!strcmp(name, "on")) {
 731                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 732                         } else if (!strcmp(name, "off")) {
 733                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 734                         } else if (!strcmp(name, "sync")) {
 735                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 736                         } else {
 737                                 kfree(name);
 738                                 return -EINVAL;
 739                         }
 740                         kfree(name);
 741                         break;
 742                 case Opt_disable_roll_forward:
 743                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 744                         break;
 745                 case Opt_norecovery:
 746                         /* this option mounts f2fs with ro */
 747                         set_opt(sbi, NORECOVERY);
 748                         if (!f2fs_readonly(sb))
 749                                 return -EINVAL;
 750                         break;
 751                 case Opt_discard:
 752                         if (!f2fs_hw_support_discard(sbi)) {
 753                                 f2fs_warn(sbi, "device does not support discard");
 754                                 break;
 755                         }
 756                         set_opt(sbi, DISCARD);
 757                         break;
 758                 case Opt_nodiscard:
 759                         if (f2fs_hw_should_discard(sbi)) {
 760                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 761                                 return -EINVAL;
 762                         }
 763                         clear_opt(sbi, DISCARD);
 764                         break;
 765                 case Opt_noheap:
 766                         set_opt(sbi, NOHEAP);
 767                         break;
 768                 case Opt_heap:
 769                         clear_opt(sbi, NOHEAP);
 770                         break;
 771 #ifdef CONFIG_F2FS_FS_XATTR
 772                 case Opt_user_xattr:
 773                         set_opt(sbi, XATTR_USER);
 774                         break;
 775                 case Opt_nouser_xattr:
 776                         clear_opt(sbi, XATTR_USER);
 777                         break;
 778                 case Opt_inline_xattr:
 779                         set_opt(sbi, INLINE_XATTR);
 780                         break;
 781                 case Opt_noinline_xattr:
 782                         clear_opt(sbi, INLINE_XATTR);
 783                         break;
 784                 case Opt_inline_xattr_size:
 785                         if (args->from && match_int(args, &arg))
 786                                 return -EINVAL;
 787                         set_opt(sbi, INLINE_XATTR_SIZE);
 788                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 789                         break;
 790 #else
 791                 case Opt_user_xattr:
 792                         f2fs_info(sbi, "user_xattr options not supported");
 793                         break;
 794                 case Opt_nouser_xattr:
 795                         f2fs_info(sbi, "nouser_xattr options not supported");
 796                         break;
 797                 case Opt_inline_xattr:
 798                         f2fs_info(sbi, "inline_xattr options not supported");
 799                         break;
 800                 case Opt_noinline_xattr:
 801                         f2fs_info(sbi, "noinline_xattr options not supported");
 802                         break;
 803 #endif
 804 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 805                 case Opt_acl:
 806                         set_opt(sbi, POSIX_ACL);
 807                         break;
 808                 case Opt_noacl:
 809                         clear_opt(sbi, POSIX_ACL);
 810                         break;
 811 #else
 812                 case Opt_acl:
 813                         f2fs_info(sbi, "acl options not supported");
 814                         break;
 815                 case Opt_noacl:
 816                         f2fs_info(sbi, "noacl options not supported");
 817                         break;
 818 #endif
 819                 case Opt_active_logs:
 820                         if (args->from && match_int(args, &arg))
 821                                 return -EINVAL;
 822                         if (arg != 2 && arg != 4 &&
 823                                 arg != NR_CURSEG_PERSIST_TYPE)
 824                                 return -EINVAL;
 825                         F2FS_OPTION(sbi).active_logs = arg;
 826                         break;
 827                 case Opt_disable_ext_identify:
 828                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 829                         break;
 830                 case Opt_inline_data:
 831                         set_opt(sbi, INLINE_DATA);
 832                         break;
 833                 case Opt_inline_dentry:
 834                         set_opt(sbi, INLINE_DENTRY);
 835                         break;
 836                 case Opt_noinline_dentry:
 837                         clear_opt(sbi, INLINE_DENTRY);
 838                         break;
 839                 case Opt_flush_merge:
 840                         set_opt(sbi, FLUSH_MERGE);
 841                         break;
 842                 case Opt_noflush_merge:
 843                         clear_opt(sbi, FLUSH_MERGE);
 844                         break;
 845                 case Opt_nobarrier:
 846                         set_opt(sbi, NOBARRIER);
 847                         break;
 848                 case Opt_barrier:
 849                         clear_opt(sbi, NOBARRIER);
 850                         break;
 851                 case Opt_fastboot:
 852                         set_opt(sbi, FASTBOOT);
 853                         break;
 854                 case Opt_extent_cache:
 855                         set_opt(sbi, READ_EXTENT_CACHE);
 856                         break;
 857                 case Opt_noextent_cache:
 858                         clear_opt(sbi, READ_EXTENT_CACHE);
 859                         break;
 860                 case Opt_noinline_data:
 861                         clear_opt(sbi, INLINE_DATA);
 862                         break;
 863                 case Opt_data_flush:
 864                         set_opt(sbi, DATA_FLUSH);
 865                         break;
 866                 case Opt_reserve_root:
 867                         if (args->from && match_int(args, &arg))
 868                                 return -EINVAL;
 869                         if (test_opt(sbi, RESERVE_ROOT)) {
 870                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 871                                           F2FS_OPTION(sbi).root_reserved_blocks);
 872                         } else {
 873                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 874                                 set_opt(sbi, RESERVE_ROOT);
 875                         }
 876                         break;
 877                 case Opt_resuid:
 878                         if (args->from && match_int(args, &arg))
 879                                 return -EINVAL;
 880                         uid = make_kuid(current_user_ns(), arg);
 881                         if (!uid_valid(uid)) {
 882                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 883                                 return -EINVAL;
 884                         }
 885                         F2FS_OPTION(sbi).s_resuid = uid;
 886                         break;
 887                 case Opt_resgid:
 888                         if (args->from && match_int(args, &arg))
 889                                 return -EINVAL;
 890                         gid = make_kgid(current_user_ns(), arg);
 891                         if (!gid_valid(gid)) {
 892                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 893                                 return -EINVAL;
 894                         }
 895                         F2FS_OPTION(sbi).s_resgid = gid;
 896                         break;
 897                 case Opt_mode:
 898                         name = match_strdup(&args[0]);
 899
 900                         if (!name)
 901                                 return -ENOMEM;
 902                         if (!strcmp(name, "adaptive")) {
 903                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 904                         } else if (!strcmp(name, "lfs")) {
 905                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 906                         } else if (!strcmp(name, "fragment:segment")) {
 907                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 908                         } else if (!strcmp(name, "fragment:block")) {
 909                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 910                         } else {
 911                                 kfree(name);
 912                                 return -EINVAL;
 913                         }
 914                         kfree(name);
 915                         break;
 916                 case Opt_io_size_bits:
 917                         if (args->from && match_int(args, &arg))
 918                                 return -EINVAL;
 919                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 920                                 f2fs_warn(sbi, "Not support %ld, larger than %d",
 921                                         BIT(arg), BIO_MAX_VECS);
 922                                 return -EINVAL;
 923                         }
 924                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 925                         break;
 926 #ifdef CONFIG_F2FS_FAULT_INJECTION
 927                 case Opt_fault_injection:
 928                         if (args->from && match_int(args, &arg))
 929                                 return -EINVAL;
 930                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 931                         set_opt(sbi, FAULT_INJECTION);
 932                         break;
 933
 934                 case Opt_fault_type:
 935                         if (args->from && match_int(args, &arg))
 936                                 return -EINVAL;
 937                         f2fs_build_fault_attr(sbi, 0, arg);
 938                         set_opt(sbi, FAULT_INJECTION);
 939                         break;
 940 #else
 941                 case Opt_fault_injection:
 942                         f2fs_info(sbi, "fault_injection options not supported");
 943                         break;
 944
 945                 case Opt_fault_type:
 946                         f2fs_info(sbi, "fault_type options not supported");
 947                         break;
 948 #endif
 949                 case Opt_lazytime:
 950                         sb->s_flags |= SB_LAZYTIME;
 951                         break;
 952                 case Opt_nolazytime:
 953                         sb->s_flags &= ~SB_LAZYTIME;
 954                         break;
 955 #ifdef CONFIG_QUOTA
 956                 case Opt_quota:
 957                 case Opt_usrquota:
 958                         set_opt(sbi, USRQUOTA);
 959                         break;
 960                 case Opt_grpquota:
 961                         set_opt(sbi, GRPQUOTA);
 962                         break;
 963                 case Opt_prjquota:
 964                         set_opt(sbi, PRJQUOTA);
 965                         break;
 966                 case Opt_usrjquota:
 967                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 968                         if (ret)
 969                                 return ret;
 970                         break;
 971                 case Opt_grpjquota:
 972                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 973                         if (ret)
 974                                 return ret;
 975                         break;
 976                 case Opt_prjjquota:
 977                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 978                         if (ret)
 979                                 return ret;
 980                         break;
 981                 case Opt_offusrjquota:
 982                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 983                         if (ret)
 984                                 return ret;
 985                         break;
 986                 case Opt_offgrpjquota:
 987                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 988                         if (ret)
 989                                 return ret;
 990                         break;
 991                 case Opt_offprjjquota:
 992                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 993                         if (ret)
 994                                 return ret;
 995                         break;
 996                 case Opt_jqfmt_vfsold:
 997                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 998                         break;
 999                 case Opt_jqfmt_vfsv0:
1000                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
1001                         break;
1002                 case Opt_jqfmt_vfsv1:
1003                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
1004                         break;
1005                 case Opt_noquota:
1006                         clear_opt(sbi, QUOTA);
1007                         clear_opt(sbi, USRQUOTA);
1008                         clear_opt(sbi, GRPQUOTA);
1009                         clear_opt(sbi, PRJQUOTA);
1010                         break;
1011 #else
1012                 case Opt_quota:
1013                 case Opt_usrquota:
1014                 case Opt_grpquota:
1015                 case Opt_prjquota:
1016                 case Opt_usrjquota:
1017                 case Opt_grpjquota:
1018                 case Opt_prjjquota:
1019                 case Opt_offusrjquota:
1020                 case Opt_offgrpjquota:
1021                 case Opt_offprjjquota:
1022                 case Opt_jqfmt_vfsold:
1023                 case Opt_jqfmt_vfsv0:
1024                 case Opt_jqfmt_vfsv1:
1025                 case Opt_noquota:
1026                         f2fs_info(sbi, "quota operations not supported");
1027                         break;
1028 #endif
1029                 case Opt_alloc:
1030                         name = match_strdup(&args[0]);
1031                         if (!name)
1032                                 return -ENOMEM;
1033
1034                         if (!strcmp(name, "default")) {
1035                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1036                         } else if (!strcmp(name, "reuse")) {
1037                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1038                         } else {
1039                                 kfree(name);
1040                                 return -EINVAL;
1041                         }
1042                         kfree(name);
1043                         break;
1044                 case Opt_fsync:
1045                         name = match_strdup(&args[0]);
1046                         if (!name)
1047                                 return -ENOMEM;
1048                         if (!strcmp(name, "posix")) {
1049                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1050                         } else if (!strcmp(name, "strict")) {
1051                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1052                         } else if (!strcmp(name, "nobarrier")) {
1053                                 F2FS_OPTION(sbi).fsync_mode =
1054                                                         FSYNC_MODE_NOBARRIER;
1055                         } else {
1056                                 kfree(name);
1057                                 return -EINVAL;
1058                         }
1059                         kfree(name);
1060                         break;
1061                 case Opt_test_dummy_encryption:
1062                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1063                                                              is_remount);
1064                         if (ret)
1065                                 return ret;
1066                         break;
1067                 case Opt_inlinecrypt:
1068 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1069                         sb->s_flags |= SB_INLINECRYPT;
1070 #else
1071                         f2fs_info(sbi, "inline encryption not supported");
1072 #endif
1073                         break;
1074                 case Opt_checkpoint_disable_cap_perc:
1075                         if (args->from && match_int(args, &arg))
1076                                 return -EINVAL;
1077                         if (arg < 0 || arg > 100)
1078                                 return -EINVAL;
1079                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1080                         set_opt(sbi, DISABLE_CHECKPOINT);
1081                         break;
1082                 case Opt_checkpoint_disable_cap:
1083                         if (args->from && match_int(args, &arg))
1084                                 return -EINVAL;
1085                         F2FS_OPTION(sbi).unusable_cap = arg;
1086                         set_opt(sbi, DISABLE_CHECKPOINT);
1087                         break;
1088                 case Opt_checkpoint_disable:
1089                         set_opt(sbi, DISABLE_CHECKPOINT);
1090                         break;
1091                 case Opt_checkpoint_enable:
1092                         clear_opt(sbi, DISABLE_CHECKPOINT);
1093                         break;
1094                 case Opt_checkpoint_merge:
1095                         set_opt(sbi, MERGE_CHECKPOINT);
1096                         break;
1097                 case Opt_nocheckpoint_merge:
1098                         clear_opt(sbi, MERGE_CHECKPOINT);
1099                         break;
1100 #ifdef CONFIG_F2FS_FS_COMPRESSION
1101                 case Opt_compress_algorithm:
1102                         if (!f2fs_sb_has_compression(sbi)) {
1103                                 f2fs_info(sbi, "Image doesn't support compression");
1104                                 break;
1105                         }
1106                         name = match_strdup(&args[0]);
1107                         if (!name)
1108                                 return -ENOMEM;
1109                         if (!strcmp(name, "lzo")) {
1110 #ifdef CONFIG_F2FS_FS_LZO
1111                                 F2FS_OPTION(sbi).compress_level = 0;
1112                                 F2FS_OPTION(sbi).compress_algorithm =
1113                                                                 COMPRESS_LZO;
1114 #else
1115                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1116 #endif
1117                         } else if (!strncmp(name, "lz4", 3)) {
1118 #ifdef CONFIG_F2FS_FS_LZ4
1119                                 ret = f2fs_set_lz4hc_level(sbi, name);
1120                                 if (ret) {
1121                                         kfree(name);
1122                                         return -EINVAL;
1123                                 }
1124                                 F2FS_OPTION(sbi).compress_algorithm =
1125                                                                 COMPRESS_LZ4;
1126 #else
1127                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1128 #endif
1129                         } else if (!strncmp(name, "zstd", 4)) {
1130 #ifdef CONFIG_F2FS_FS_ZSTD
1131                                 ret = f2fs_set_zstd_level(sbi, name);
1132                                 if (ret) {
1133                                         kfree(name);
1134                                         return -EINVAL;
1135                                 }
1136                                 F2FS_OPTION(sbi).compress_algorithm =
1137                                                                 COMPRESS_ZSTD;
1138 #else
1139                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1140 #endif
1141                         } else if (!strcmp(name, "lzo-rle")) {
1142 #ifdef CONFIG_F2FS_FS_LZORLE
1143                                 F2FS_OPTION(sbi).compress_level = 0;
1144                                 F2FS_OPTION(sbi).compress_algorithm =
1145                                                                 COMPRESS_LZORLE;
1146 #else
1147                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1148 #endif
1149                         } else {
1150                                 kfree(name);
1151                                 return -EINVAL;
1152                         }
1153                         kfree(name);
1154                         break;
1155                 case Opt_compress_log_size:
1156                         if (!f2fs_sb_has_compression(sbi)) {
1157                                 f2fs_info(sbi, "Image doesn't support compression");
1158                                 break;
1159                         }
1160                         if (args->from && match_int(args, &arg))
1161                                 return -EINVAL;
1162                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1163                                 arg > MAX_COMPRESS_LOG_SIZE) {
1164                                 f2fs_err(sbi,
1165                                         "Compress cluster log size is out of range");
1166                                 return -EINVAL;
1167                         }
1168                         F2FS_OPTION(sbi).compress_log_size = arg;
1169                         break;
1170                 case Opt_compress_extension:
1171                         if (!f2fs_sb_has_compression(sbi)) {
1172                                 f2fs_info(sbi, "Image doesn't support compression");
1173                                 break;
1174                         }
1175                         name = match_strdup(&args[0]);
1176                         if (!name)
1177                                 return -ENOMEM;
1178
1179                         ext = F2FS_OPTION(sbi).extensions;
1180                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1181
1182                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1183                                 ext_cnt >= COMPRESS_EXT_NUM) {
1184                                 f2fs_err(sbi,
1185                                         "invalid extension length/number");
1186                                 kfree(name);
1187                                 return -EINVAL;
1188                         }
1189
1190                         if (is_compress_extension_exist(sbi, name, true)) {
1191                                 kfree(name);
1192                                 break;
1193                         }
1194
1195                         strcpy(ext[ext_cnt], name);
1196                         F2FS_OPTION(sbi).compress_ext_cnt++;
1197                         kfree(name);
1198                         break;
1199                 case Opt_nocompress_extension:
1200                         if (!f2fs_sb_has_compression(sbi)) {
1201                                 f2fs_info(sbi, "Image doesn't support compression");
1202                                 break;
1203                         }
1204                         name = match_strdup(&args[0]);
1205                         if (!name)
1206                                 return -ENOMEM;
1207
1208                         noext = F2FS_OPTION(sbi).noextensions;
1209                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1210
1211                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1212                                 noext_cnt >= COMPRESS_EXT_NUM) {
1213                                 f2fs_err(sbi,
1214                                         "invalid extension length/number");
1215                                 kfree(name);
1216                                 return -EINVAL;
1217                         }
1218
1219                         if (is_compress_extension_exist(sbi, name, false)) {
1220                                 kfree(name);
1221                                 break;
1222                         }
1223
1224                         strcpy(noext[noext_cnt], name);
1225                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1226                         kfree(name);
1227                         break;
1228                 case Opt_compress_chksum:
1229                         if (!f2fs_sb_has_compression(sbi)) {
1230                                 f2fs_info(sbi, "Image doesn't support compression");
1231                                 break;
1232                         }
1233                         F2FS_OPTION(sbi).compress_chksum = true;
1234                         break;
1235                 case Opt_compress_mode:
1236                         if (!f2fs_sb_has_compression(sbi)) {
1237                                 f2fs_info(sbi, "Image doesn't support compression");
1238                                 break;
1239                         }
1240                         name = match_strdup(&args[0]);
1241                         if (!name)
1242                                 return -ENOMEM;
1243                         if (!strcmp(name, "fs")) {
1244                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1245                         } else if (!strcmp(name, "user")) {
1246                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1247                         } else {
1248                                 kfree(name);
1249                                 return -EINVAL;
1250                         }
1251                         kfree(name);
1252                         break;
1253                 case Opt_compress_cache:
1254                         if (!f2fs_sb_has_compression(sbi)) {
1255                                 f2fs_info(sbi, "Image doesn't support compression");
1256                                 break;
1257                         }
1258                         set_opt(sbi, COMPRESS_CACHE);
1259                         break;
1260 #else
1261                 case Opt_compress_algorithm:
1262                 case Opt_compress_log_size:
1263                 case Opt_compress_extension:
1264                 case Opt_nocompress_extension:
1265                 case Opt_compress_chksum:
1266                 case Opt_compress_mode:
1267                 case Opt_compress_cache:
1268                         f2fs_info(sbi, "compression options not supported");
1269                         break;
1270 #endif
1271                 case Opt_atgc:
1272                         set_opt(sbi, ATGC);
1273                         break;
1274                 case Opt_gc_merge:
1275                         set_opt(sbi, GC_MERGE);
1276                         break;
1277                 case Opt_nogc_merge:
1278                         clear_opt(sbi, GC_MERGE);
1279                         break;
1280                 case Opt_discard_unit:
1281                         name = match_strdup(&args[0]);
1282                         if (!name)
1283                                 return -ENOMEM;
1284                         if (!strcmp(name, "block")) {
1285                                 F2FS_OPTION(sbi).discard_unit =
1286                                                 DISCARD_UNIT_BLOCK;
1287                         } else if (!strcmp(name, "segment")) {
1288                                 F2FS_OPTION(sbi).discard_unit =
1289                                                 DISCARD_UNIT_SEGMENT;
1290                         } else if (!strcmp(name, "section")) {
1291                                 F2FS_OPTION(sbi).discard_unit =
1292                                                 DISCARD_UNIT_SECTION;
1293                         } else {
1294                                 kfree(name);
1295                                 return -EINVAL;
1296                         }
1297                         kfree(name);
1298                         break;
1299                 case Opt_memory_mode:
1300                         name = match_strdup(&args[0]);
1301                         if (!name)
1302                                 return -ENOMEM;
1303                         if (!strcmp(name, "normal")) {
1304                                 F2FS_OPTION(sbi).memory_mode =
1305                                                 MEMORY_MODE_NORMAL;
1306                         } else if (!strcmp(name, "low")) {
1307                                 F2FS_OPTION(sbi).memory_mode =
1308                                                 MEMORY_MODE_LOW;
1309                         } else {
1310                                 kfree(name);
1311                                 return -EINVAL;
1312                         }
1313                         kfree(name);
1314                         break;
1315                 case Opt_age_extent_cache:
1316                         set_opt(sbi, AGE_EXTENT_CACHE);
1317                         break;
1318                 case Opt_errors:
1319                         name = match_strdup(&args[0]);
1320                         if (!name)
1321                                 return -ENOMEM;
1322                         if (!strcmp(name, "remount-ro")) {
1323                                 F2FS_OPTION(sbi).errors =
1324                                                 MOUNT_ERRORS_READONLY;
1325                         } else if (!strcmp(name, "continue")) {
1326                                 F2FS_OPTION(sbi).errors =
1327                                                 MOUNT_ERRORS_CONTINUE;
1328                         } else if (!strcmp(name, "panic")) {
1329                                 F2FS_OPTION(sbi).errors =
1330                                                 MOUNT_ERRORS_PANIC;
1331                         } else {
1332                                 kfree(name);
1333                                 return -EINVAL;
1334                         }
1335                         kfree(name);
1336                         break;
1337                 default:
1338                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1339                                  p);
1340                         return -EINVAL;
1341                 }
1342         }
1343 default_check:
1344 #ifdef CONFIG_QUOTA
1345         if (f2fs_check_quota_options(sbi))
1346                 return -EINVAL;
1347 #else
1348         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1349                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1350                 return -EINVAL;
1351         }
1352         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1353                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1354                 return -EINVAL;
1355         }
1356 #endif
1357 #if !IS_ENABLED(CONFIG_UNICODE)
1358         if (f2fs_sb_has_casefold(sbi)) {
1359                 f2fs_err(sbi,
1360                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1361                 return -EINVAL;
1362         }
1363 #endif
1364         /*
1365          * The BLKZONED feature indicates that the drive was formatted with
1366          * zone alignment optimization. This is optional for host-aware
1367          * devices, but mandatory for host-managed zoned block devices.
1368          */
1369         if (f2fs_sb_has_blkzoned(sbi)) {
1370 #ifdef CONFIG_BLK_DEV_ZONED
1371                 if (F2FS_OPTION(sbi).discard_unit !=
1372                                                 DISCARD_UNIT_SECTION) {
1373                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1374                         F2FS_OPTION(sbi).discard_unit =
1375                                         DISCARD_UNIT_SECTION;
1376                 }
1377
1378                 if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) {
1379                         f2fs_info(sbi, "Only lfs mode is allowed with zoned block device feature");
1380                         return -EINVAL;
1381                 }
1382 #else
1383                 f2fs_err(sbi, "Zoned block device support is not enabled");
1384                 return -EINVAL;
1385 #endif
1386         }
1387
1388 #ifdef CONFIG_F2FS_FS_COMPRESSION
1389         if (f2fs_test_compress_extension(sbi)) {
1390                 f2fs_err(sbi, "invalid compress or nocompress extension");
1391                 return -EINVAL;
1392         }
1393 #endif
1394
1395         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1396                 f2fs_err(sbi, "Should set mode=lfs with %luKB-sized IO",
1397                          F2FS_IO_SIZE_KB(sbi));
1398                 return -EINVAL;
1399         }
1400
1401         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1402                 int min_size, max_size;
1403
1404                 if (!f2fs_sb_has_extra_attr(sbi) ||
1405                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1406                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1407                         return -EINVAL;
1408                 }
1409                 if (!test_opt(sbi, INLINE_XATTR)) {
1410                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1411                         return -EINVAL;
1412                 }
1413
1414                 min_size = MIN_INLINE_XATTR_SIZE;
1415                 max_size = MAX_INLINE_XATTR_SIZE;
1416
1417                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1418                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1419                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1420                                  min_size, max_size);
1421                         return -EINVAL;
1422                 }
1423         }
1424
1425         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1426                 f2fs_err(sbi, "LFS is not compatible with ATGC");
1427                 return -EINVAL;
1428         }
1429
1430         if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1431                 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1432                 return -EINVAL;
1433         }
1434
1435         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1436                 f2fs_err(sbi, "Allow to mount readonly mode only");
1437                 return -EROFS;
1438         }
1439         return 0;
1440 }
1441
1442 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1443 {
1444         struct f2fs_inode_info *fi;
1445
1446         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC))
1447                 return NULL;
1448
1449         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1450         if (!fi)
1451                 return NULL;
1452
1453         init_once((void *) fi);
1454
1455         /* Initialize f2fs-specific inode info */
1456         atomic_set(&fi->dirty_pages, 0);
1457         atomic_set(&fi->i_compr_blocks, 0);
1458         init_f2fs_rwsem(&fi->i_sem);
1459         spin_lock_init(&fi->i_size_lock);
1460         INIT_LIST_HEAD(&fi->dirty_list);
1461         INIT_LIST_HEAD(&fi->gdirty_list);
1462         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1463         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1464         init_f2fs_rwsem(&fi->i_xattr_sem);
1465
1466         /* Will be used by directory only */
1467         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1468
1469         return &fi->vfs_inode;
1470 }
1471
1472 static int f2fs_drop_inode(struct inode *inode)
1473 {
1474         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1475         int ret;
1476
1477         /*
1478          * during filesystem shutdown, if checkpoint is disabled,
1479          * drop useless meta/node dirty pages.
1480          */
1481         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1482                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1483                         inode->i_ino == F2FS_META_INO(sbi)) {
1484                         trace_f2fs_drop_inode(inode, 1);
1485                         return 1;
1486                 }
1487         }
1488
1489         /*
1490          * This is to avoid a deadlock condition like below.
1491          * writeback_single_inode(inode)
1492          *  - f2fs_write_data_page
1493          *    - f2fs_gc -> iput -> evict
1494          *       - inode_wait_for_writeback(inode)
1495          */
1496         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1497                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1498                         /* to avoid evict_inode call simultaneously */
1499                         atomic_inc(&inode->i_count);
1500                         spin_unlock(&inode->i_lock);
1501
1502                         /* should remain fi->extent_tree for writepage */
1503                         f2fs_destroy_extent_node(inode);
1504
1505                         sb_start_intwrite(inode->i_sb);
1506                         f2fs_i_size_write(inode, 0);
1507
1508                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1509                                         inode, NULL, 0, DATA);
1510                         truncate_inode_pages_final(inode->i_mapping);
1511
1512                         if (F2FS_HAS_BLOCKS(inode))
1513                                 f2fs_truncate(inode);
1514
1515                         sb_end_intwrite(inode->i_sb);
1516
1517                         spin_lock(&inode->i_lock);
1518                         atomic_dec(&inode->i_count);
1519                 }
1520                 trace_f2fs_drop_inode(inode, 0);
1521                 return 0;
1522         }
1523         ret = generic_drop_inode(inode);
1524         if (!ret)
1525                 ret = fscrypt_drop_inode(inode);
1526         trace_f2fs_drop_inode(inode, ret);
1527         return ret;
1528 }
1529
1530 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1531 {
1532         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1533         int ret = 0;
1534
1535         spin_lock(&sbi->inode_lock[DIRTY_META]);
1536         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1537                 ret = 1;
1538         } else {
1539                 set_inode_flag(inode, FI_DIRTY_INODE);
1540                 stat_inc_dirty_inode(sbi, DIRTY_META);
1541         }
1542         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1543                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1544                                 &sbi->inode_list[DIRTY_META]);
1545                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1546         }
1547         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1548         return ret;
1549 }
1550
1551 void f2fs_inode_synced(struct inode *inode)
1552 {
1553         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1554
1555         spin_lock(&sbi->inode_lock[DIRTY_META]);
1556         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1557                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1558                 return;
1559         }
1560         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1561                 list_del_init(&F2FS_I(inode)->gdirty_list);
1562                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1563         }
1564         clear_inode_flag(inode, FI_DIRTY_INODE);
1565         clear_inode_flag(inode, FI_AUTO_RECOVER);
1566         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1567         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1568 }
1569
1570 /*
1571  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1572  *
1573  * We should call set_dirty_inode to write the dirty inode through write_inode.
1574  */
1575 static void f2fs_dirty_inode(struct inode *inode, int flags)
1576 {
1577         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1578
1579         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1580                         inode->i_ino == F2FS_META_INO(sbi))
1581                 return;
1582
1583         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1584                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1585
1586         f2fs_inode_dirtied(inode, false);
1587 }
1588
1589 static void f2fs_free_inode(struct inode *inode)
1590 {
1591         fscrypt_free_inode(inode);
1592         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1593 }
1594
1595 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1596 {
1597         percpu_counter_destroy(&sbi->total_valid_inode_count);
1598         percpu_counter_destroy(&sbi->rf_node_block_count);
1599         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1600 }
1601
1602 static void destroy_device_list(struct f2fs_sb_info *sbi)
1603 {
1604         int i;
1605
1606         for (i = 0; i < sbi->s_ndevs; i++) {
1607                 if (i > 0)
1608                         fput(FDEV(i).bdev_file);
1609 #ifdef CONFIG_BLK_DEV_ZONED
1610                 kvfree(FDEV(i).blkz_seq);
1611 #endif
1612         }
1613         kvfree(sbi->devs);
1614 }
1615
1616 static void f2fs_put_super(struct super_block *sb)
1617 {
1618         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1619         int i;
1620         int err = 0;
1621         bool done;
1622
1623         /* unregister procfs/sysfs entries in advance to avoid race case */
1624         f2fs_unregister_sysfs(sbi);
1625
1626         f2fs_quota_off_umount(sb);
1627
1628         /* prevent remaining shrinker jobs */
1629         mutex_lock(&sbi->umount_mutex);
1630
1631         /*
1632          * flush all issued checkpoints and stop checkpoint issue thread.
1633          * after then, all checkpoints should be done by each process context.
1634          */
1635         f2fs_stop_ckpt_thread(sbi);
1636
1637         /*
1638          * We don't need to do checkpoint when superblock is clean.
1639          * But, the previous checkpoint was not done by umount, it needs to do
1640          * clean checkpoint again.
1641          */
1642         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1643                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1644                 struct cp_control cpc = {
1645                         .reason = CP_UMOUNT,
1646                 };
1647                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1648                 err = f2fs_write_checkpoint(sbi, &cpc);
1649         }
1650
1651         /* be sure to wait for any on-going discard commands */
1652         done = f2fs_issue_discard_timeout(sbi);
1653         if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && done) {
1654                 struct cp_control cpc = {
1655                         .reason = CP_UMOUNT | CP_TRIMMED,
1656                 };
1657                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1658                 err = f2fs_write_checkpoint(sbi, &cpc);
1659         }
1660
1661         /*
1662          * normally superblock is clean, so we need to release this.
1663          * In addition, EIO will skip do checkpoint, we need this as well.
1664          */
1665         f2fs_release_ino_entry(sbi, true);
1666
1667         f2fs_leave_shrinker(sbi);
1668         mutex_unlock(&sbi->umount_mutex);
1669
1670         /* our cp_error case, we can wait for any writeback page */
1671         f2fs_flush_merged_writes(sbi);
1672
1673         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1674
1675         if (err || f2fs_cp_error(sbi)) {
1676                 truncate_inode_pages_final(NODE_MAPPING(sbi));
1677                 truncate_inode_pages_final(META_MAPPING(sbi));
1678         }
1679
1680         for (i = 0; i < NR_COUNT_TYPE; i++) {
1681                 if (!get_pages(sbi, i))
1682                         continue;
1683                 f2fs_err(sbi, "detect filesystem reference count leak during "
1684                         "umount, type: %d, count: %lld", i, get_pages(sbi, i));
1685                 f2fs_bug_on(sbi, 1);
1686         }
1687
1688         f2fs_bug_on(sbi, sbi->fsync_node_num);
1689
1690         f2fs_destroy_compress_inode(sbi);
1691
1692         iput(sbi->node_inode);
1693         sbi->node_inode = NULL;
1694
1695         iput(sbi->meta_inode);
1696         sbi->meta_inode = NULL;
1697
1698         /*
1699          * iput() can update stat information, if f2fs_write_checkpoint()
1700          * above failed with error.
1701          */
1702         f2fs_destroy_stats(sbi);
1703
1704         /* destroy f2fs internal modules */
1705         f2fs_destroy_node_manager(sbi);
1706         f2fs_destroy_segment_manager(sbi);
1707
1708         /* flush s_error_work before sbi destroy */
1709         flush_work(&sbi->s_error_work);
1710
1711         f2fs_destroy_post_read_wq(sbi);
1712
1713         kvfree(sbi->ckpt);
1714
1715         if (sbi->s_chksum_driver)
1716                 crypto_free_shash(sbi->s_chksum_driver);
1717         kfree(sbi->raw_super);
1718
1719         f2fs_destroy_page_array_cache(sbi);
1720         f2fs_destroy_xattr_caches(sbi);
1721         mempool_destroy(sbi->write_io_dummy);
1722 #ifdef CONFIG_QUOTA
1723         for (i = 0; i < MAXQUOTAS; i++)
1724                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1725 #endif
1726         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1727         destroy_percpu_info(sbi);
1728         f2fs_destroy_iostat(sbi);
1729         for (i = 0; i < NR_PAGE_TYPE; i++)
1730                 kvfree(sbi->write_io[i]);
1731 #if IS_ENABLED(CONFIG_UNICODE)
1732         utf8_unload(sb->s_encoding);
1733 #endif
1734 }
1735
1736 int f2fs_sync_fs(struct super_block *sb, int sync)
1737 {
1738         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1739         int err = 0;
1740
1741         if (unlikely(f2fs_cp_error(sbi)))
1742                 return 0;
1743         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1744                 return 0;
1745
1746         trace_f2fs_sync_fs(sb, sync);
1747
1748         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1749                 return -EAGAIN;
1750
1751         if (sync) {
1752                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1753                 err = f2fs_issue_checkpoint(sbi);
1754         }
1755
1756         return err;
1757 }
1758
1759 static int f2fs_freeze(struct super_block *sb)
1760 {
1761         if (f2fs_readonly(sb))
1762                 return 0;
1763
1764         /* IO error happened before */
1765         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1766                 return -EIO;
1767
1768         /* must be clean, since sync_filesystem() was already called */
1769         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1770                 return -EINVAL;
1771
1772         /* Let's flush checkpoints and stop the thread. */
1773         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1774
1775         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1776         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1777         return 0;
1778 }
1779
1780 static int f2fs_unfreeze(struct super_block *sb)
1781 {
1782         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1783         return 0;
1784 }
1785
1786 #ifdef CONFIG_QUOTA
1787 static int f2fs_statfs_project(struct super_block *sb,
1788                                 kprojid_t projid, struct kstatfs *buf)
1789 {
1790         struct kqid qid;
1791         struct dquot *dquot;
1792         u64 limit;
1793         u64 curblock;
1794
1795         qid = make_kqid_projid(projid);
1796         dquot = dqget(sb, qid);
1797         if (IS_ERR(dquot))
1798                 return PTR_ERR(dquot);
1799         spin_lock(&dquot->dq_dqb_lock);
1800
1801         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1802                                         dquot->dq_dqb.dqb_bhardlimit);
1803         if (limit)
1804                 limit >>= sb->s_blocksize_bits;
1805
1806         if (limit && buf->f_blocks > limit) {
1807                 curblock = (dquot->dq_dqb.dqb_curspace +
1808                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1809                 buf->f_blocks = limit;
1810                 buf->f_bfree = buf->f_bavail =
1811                         (buf->f_blocks > curblock) ?
1812                          (buf->f_blocks - curblock) : 0;
1813         }
1814
1815         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1816                                         dquot->dq_dqb.dqb_ihardlimit);
1817
1818         if (limit && buf->f_files > limit) {
1819                 buf->f_files = limit;
1820                 buf->f_ffree =
1821                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1822                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1823         }
1824
1825         spin_unlock(&dquot->dq_dqb_lock);
1826         dqput(dquot);
1827         return 0;
1828 }
1829 #endif
1830
1831 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1832 {
1833         struct super_block *sb = dentry->d_sb;
1834         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1835         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1836         block_t total_count, user_block_count, start_count;
1837         u64 avail_node_count;
1838         unsigned int total_valid_node_count;
1839
1840         total_count = le64_to_cpu(sbi->raw_super->block_count);
1841         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1842         buf->f_type = F2FS_SUPER_MAGIC;
1843         buf->f_bsize = sbi->blocksize;
1844
1845         buf->f_blocks = total_count - start_count;
1846
1847         spin_lock(&sbi->stat_lock);
1848
1849         user_block_count = sbi->user_block_count;
1850         total_valid_node_count = valid_node_count(sbi);
1851         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1852         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1853                                                 sbi->current_reserved_blocks;
1854
1855         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1856                 buf->f_bfree = 0;
1857         else
1858                 buf->f_bfree -= sbi->unusable_block_count;
1859         spin_unlock(&sbi->stat_lock);
1860
1861         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1862                 buf->f_bavail = buf->f_bfree -
1863                                 F2FS_OPTION(sbi).root_reserved_blocks;
1864         else
1865                 buf->f_bavail = 0;
1866
1867         if (avail_node_count > user_block_count) {
1868                 buf->f_files = user_block_count;
1869                 buf->f_ffree = buf->f_bavail;
1870         } else {
1871                 buf->f_files = avail_node_count;
1872                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1873                                         buf->f_bavail);
1874         }
1875
1876         buf->f_namelen = F2FS_NAME_LEN;
1877         buf->f_fsid    = u64_to_fsid(id);
1878
1879 #ifdef CONFIG_QUOTA
1880         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1881                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1882                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1883         }
1884 #endif
1885         return 0;
1886 }
1887
1888 static inline void f2fs_show_quota_options(struct seq_file *seq,
1889                                            struct super_block *sb)
1890 {
1891 #ifdef CONFIG_QUOTA
1892         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1893
1894         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1895                 char *fmtname = "";
1896
1897                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1898                 case QFMT_VFS_OLD:
1899                         fmtname = "vfsold";
1900                         break;
1901                 case QFMT_VFS_V0:
1902                         fmtname = "vfsv0";
1903                         break;
1904                 case QFMT_VFS_V1:
1905                         fmtname = "vfsv1";
1906                         break;
1907                 }
1908                 seq_printf(seq, ",jqfmt=%s", fmtname);
1909         }
1910
1911         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1912                 seq_show_option(seq, "usrjquota",
1913                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1914
1915         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1916                 seq_show_option(seq, "grpjquota",
1917                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1918
1919         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1920                 seq_show_option(seq, "prjjquota",
1921                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1922 #endif
1923 }
1924
1925 #ifdef CONFIG_F2FS_FS_COMPRESSION
1926 static inline void f2fs_show_compress_options(struct seq_file *seq,
1927                                                         struct super_block *sb)
1928 {
1929         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1930         char *algtype = "";
1931         int i;
1932
1933         if (!f2fs_sb_has_compression(sbi))
1934                 return;
1935
1936         switch (F2FS_OPTION(sbi).compress_algorithm) {
1937         case COMPRESS_LZO:
1938                 algtype = "lzo";
1939                 break;
1940         case COMPRESS_LZ4:
1941                 algtype = "lz4";
1942                 break;
1943         case COMPRESS_ZSTD:
1944                 algtype = "zstd";
1945                 break;
1946         case COMPRESS_LZORLE:
1947                 algtype = "lzo-rle";
1948                 break;
1949         }
1950         seq_printf(seq, ",compress_algorithm=%s", algtype);
1951
1952         if (F2FS_OPTION(sbi).compress_level)
1953                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1954
1955         seq_printf(seq, ",compress_log_size=%u",
1956                         F2FS_OPTION(sbi).compress_log_size);
1957
1958         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1959                 seq_printf(seq, ",compress_extension=%s",
1960                         F2FS_OPTION(sbi).extensions[i]);
1961         }
1962
1963         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1964                 seq_printf(seq, ",nocompress_extension=%s",
1965                         F2FS_OPTION(sbi).noextensions[i]);
1966         }
1967
1968         if (F2FS_OPTION(sbi).compress_chksum)
1969                 seq_puts(seq, ",compress_chksum");
1970
1971         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1972                 seq_printf(seq, ",compress_mode=%s", "fs");
1973         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1974                 seq_printf(seq, ",compress_mode=%s", "user");
1975
1976         if (test_opt(sbi, COMPRESS_CACHE))
1977                 seq_puts(seq, ",compress_cache");
1978 }
1979 #endif
1980
1981 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1982 {
1983         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1984
1985         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1986                 seq_printf(seq, ",background_gc=%s", "sync");
1987         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1988                 seq_printf(seq, ",background_gc=%s", "on");
1989         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1990                 seq_printf(seq, ",background_gc=%s", "off");
1991
1992         if (test_opt(sbi, GC_MERGE))
1993                 seq_puts(seq, ",gc_merge");
1994         else
1995                 seq_puts(seq, ",nogc_merge");
1996
1997         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1998                 seq_puts(seq, ",disable_roll_forward");
1999         if (test_opt(sbi, NORECOVERY))
2000                 seq_puts(seq, ",norecovery");
2001         if (test_opt(sbi, DISCARD)) {
2002                 seq_puts(seq, ",discard");
2003                 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2004                         seq_printf(seq, ",discard_unit=%s", "block");
2005                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2006                         seq_printf(seq, ",discard_unit=%s", "segment");
2007                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2008                         seq_printf(seq, ",discard_unit=%s", "section");
2009         } else {
2010                 seq_puts(seq, ",nodiscard");
2011         }
2012         if (test_opt(sbi, NOHEAP))
2013                 seq_puts(seq, ",no_heap");
2014         else
2015                 seq_puts(seq, ",heap");
2016 #ifdef CONFIG_F2FS_FS_XATTR
2017         if (test_opt(sbi, XATTR_USER))
2018                 seq_puts(seq, ",user_xattr");
2019         else
2020                 seq_puts(seq, ",nouser_xattr");
2021         if (test_opt(sbi, INLINE_XATTR))
2022                 seq_puts(seq, ",inline_xattr");
2023         else
2024                 seq_puts(seq, ",noinline_xattr");
2025         if (test_opt(sbi, INLINE_XATTR_SIZE))
2026                 seq_printf(seq, ",inline_xattr_size=%u",
2027                                         F2FS_OPTION(sbi).inline_xattr_size);
2028 #endif
2029 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2030         if (test_opt(sbi, POSIX_ACL))
2031                 seq_puts(seq, ",acl");
2032         else
2033                 seq_puts(seq, ",noacl");
2034 #endif
2035         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
2036                 seq_puts(seq, ",disable_ext_identify");
2037         if (test_opt(sbi, INLINE_DATA))
2038                 seq_puts(seq, ",inline_data");
2039         else
2040                 seq_puts(seq, ",noinline_data");
2041         if (test_opt(sbi, INLINE_DENTRY))
2042                 seq_puts(seq, ",inline_dentry");
2043         else
2044                 seq_puts(seq, ",noinline_dentry");
2045         if (test_opt(sbi, FLUSH_MERGE))
2046                 seq_puts(seq, ",flush_merge");
2047         else
2048                 seq_puts(seq, ",noflush_merge");
2049         if (test_opt(sbi, NOBARRIER))
2050                 seq_puts(seq, ",nobarrier");
2051         else
2052                 seq_puts(seq, ",barrier");
2053         if (test_opt(sbi, FASTBOOT))
2054                 seq_puts(seq, ",fastboot");
2055         if (test_opt(sbi, READ_EXTENT_CACHE))
2056                 seq_puts(seq, ",extent_cache");
2057         else
2058                 seq_puts(seq, ",noextent_cache");
2059         if (test_opt(sbi, AGE_EXTENT_CACHE))
2060                 seq_puts(seq, ",age_extent_cache");
2061         if (test_opt(sbi, DATA_FLUSH))
2062                 seq_puts(seq, ",data_flush");
2063
2064         seq_puts(seq, ",mode=");
2065         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
2066                 seq_puts(seq, "adaptive");
2067         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
2068                 seq_puts(seq, "lfs");
2069         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
2070                 seq_puts(seq, "fragment:segment");
2071         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2072                 seq_puts(seq, "fragment:block");
2073         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
2074         if (test_opt(sbi, RESERVE_ROOT))
2075                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
2076                                 F2FS_OPTION(sbi).root_reserved_blocks,
2077                                 from_kuid_munged(&init_user_ns,
2078                                         F2FS_OPTION(sbi).s_resuid),
2079                                 from_kgid_munged(&init_user_ns,
2080                                         F2FS_OPTION(sbi).s_resgid));
2081         if (F2FS_IO_SIZE_BITS(sbi))
2082                 seq_printf(seq, ",io_bits=%u",
2083                                 F2FS_OPTION(sbi).write_io_size_bits);
2084 #ifdef CONFIG_F2FS_FAULT_INJECTION
2085         if (test_opt(sbi, FAULT_INJECTION)) {
2086                 seq_printf(seq, ",fault_injection=%u",
2087                                 F2FS_OPTION(sbi).fault_info.inject_rate);
2088                 seq_printf(seq, ",fault_type=%u",
2089                                 F2FS_OPTION(sbi).fault_info.inject_type);
2090         }
2091 #endif
2092 #ifdef CONFIG_QUOTA
2093         if (test_opt(sbi, QUOTA))
2094                 seq_puts(seq, ",quota");
2095         if (test_opt(sbi, USRQUOTA))
2096                 seq_puts(seq, ",usrquota");
2097         if (test_opt(sbi, GRPQUOTA))
2098                 seq_puts(seq, ",grpquota");
2099         if (test_opt(sbi, PRJQUOTA))
2100                 seq_puts(seq, ",prjquota");
2101 #endif
2102         f2fs_show_quota_options(seq, sbi->sb);
2103
2104         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2105
2106         if (sbi->sb->s_flags & SB_INLINECRYPT)
2107                 seq_puts(seq, ",inlinecrypt");
2108
2109         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2110                 seq_printf(seq, ",alloc_mode=%s", "default");
2111         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2112                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2113
2114         if (test_opt(sbi, DISABLE_CHECKPOINT))
2115                 seq_printf(seq, ",checkpoint=disable:%u",
2116                                 F2FS_OPTION(sbi).unusable_cap);
2117         if (test_opt(sbi, MERGE_CHECKPOINT))
2118                 seq_puts(seq, ",checkpoint_merge");
2119         else
2120                 seq_puts(seq, ",nocheckpoint_merge");
2121         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2122                 seq_printf(seq, ",fsync_mode=%s", "posix");
2123         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2124                 seq_printf(seq, ",fsync_mode=%s", "strict");
2125         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2126                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2127
2128 #ifdef CONFIG_F2FS_FS_COMPRESSION
2129         f2fs_show_compress_options(seq, sbi->sb);
2130 #endif
2131
2132         if (test_opt(sbi, ATGC))
2133                 seq_puts(seq, ",atgc");
2134
2135         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2136                 seq_printf(seq, ",memory=%s", "normal");
2137         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2138                 seq_printf(seq, ",memory=%s", "low");
2139
2140         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
2141                 seq_printf(seq, ",errors=%s", "remount-ro");
2142         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
2143                 seq_printf(seq, ",errors=%s", "continue");
2144         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
2145                 seq_printf(seq, ",errors=%s", "panic");
2146
2147         return 0;
2148 }
2149
2150 static void default_options(struct f2fs_sb_info *sbi, bool remount)
2151 {
2152         /* init some FS parameters */
2153         if (!remount) {
2154                 set_opt(sbi, READ_EXTENT_CACHE);
2155                 clear_opt(sbi, DISABLE_CHECKPOINT);
2156
2157                 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2158                         set_opt(sbi, DISCARD);
2159
2160                 if (f2fs_sb_has_blkzoned(sbi))
2161                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2162                 else
2163                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2164         }
2165
2166         if (f2fs_sb_has_readonly(sbi))
2167                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2168         else
2169                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2170
2171         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2172         if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2173                                                         SMALL_VOLUME_SEGMENTS)
2174                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2175         else
2176                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2177         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2178         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2179         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2180         if (f2fs_sb_has_compression(sbi)) {
2181                 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2182                 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2183                 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2184                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2185         }
2186         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2187         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2188         F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
2189
2190         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2191
2192         set_opt(sbi, INLINE_XATTR);
2193         set_opt(sbi, INLINE_DATA);
2194         set_opt(sbi, INLINE_DENTRY);
2195         set_opt(sbi, NOHEAP);
2196         set_opt(sbi, MERGE_CHECKPOINT);
2197         F2FS_OPTION(sbi).unusable_cap = 0;
2198         sbi->sb->s_flags |= SB_LAZYTIME;
2199         if (!f2fs_is_readonly(sbi))
2200                 set_opt(sbi, FLUSH_MERGE);
2201         if (f2fs_sb_has_blkzoned(sbi))
2202                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2203         else
2204                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2205
2206 #ifdef CONFIG_F2FS_FS_XATTR
2207         set_opt(sbi, XATTR_USER);
2208 #endif
2209 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2210         set_opt(sbi, POSIX_ACL);
2211 #endif
2212
2213         f2fs_build_fault_attr(sbi, 0, 0);
2214 }
2215
2216 #ifdef CONFIG_QUOTA
2217 static int f2fs_enable_quotas(struct super_block *sb);
2218 #endif
2219
2220 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2221 {
2222         unsigned int s_flags = sbi->sb->s_flags;
2223         struct cp_control cpc;
2224         unsigned int gc_mode = sbi->gc_mode;
2225         int err = 0;
2226         int ret;
2227         block_t unusable;
2228
2229         if (s_flags & SB_RDONLY) {
2230                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2231                 return -EINVAL;
2232         }
2233         sbi->sb->s_flags |= SB_ACTIVE;
2234
2235         /* check if we need more GC first */
2236         unusable = f2fs_get_unusable_blocks(sbi);
2237         if (!f2fs_disable_cp_again(sbi, unusable))
2238                 goto skip_gc;
2239
2240         f2fs_update_time(sbi, DISABLE_TIME);
2241
2242         sbi->gc_mode = GC_URGENT_HIGH;
2243
2244         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2245                 struct f2fs_gc_control gc_control = {
2246                         .victim_segno = NULL_SEGNO,
2247                         .init_gc_type = FG_GC,
2248                         .should_migrate_blocks = false,
2249                         .err_gc_skipped = true,
2250                         .nr_free_secs = 1 };
2251
2252                 f2fs_down_write(&sbi->gc_lock);
2253                 stat_inc_gc_call_count(sbi, FOREGROUND);
2254                 err = f2fs_gc(sbi, &gc_control);
2255                 if (err == -ENODATA) {
2256                         err = 0;
2257                         break;
2258                 }
2259                 if (err && err != -EAGAIN)
2260                         break;
2261         }
2262
2263         ret = sync_filesystem(sbi->sb);
2264         if (ret || err) {
2265                 err = ret ? ret : err;
2266                 goto restore_flag;
2267         }
2268
2269         unusable = f2fs_get_unusable_blocks(sbi);
2270         if (f2fs_disable_cp_again(sbi, unusable)) {
2271                 err = -EAGAIN;
2272                 goto restore_flag;
2273         }
2274
2275 skip_gc:
2276         f2fs_down_write(&sbi->gc_lock);
2277         cpc.reason = CP_PAUSE;
2278         set_sbi_flag(sbi, SBI_CP_DISABLED);
2279         stat_inc_cp_call_count(sbi, TOTAL_CALL);
2280         err = f2fs_write_checkpoint(sbi, &cpc);
2281         if (err)
2282                 goto out_unlock;
2283
2284         spin_lock(&sbi->stat_lock);
2285         sbi->unusable_block_count = unusable;
2286         spin_unlock(&sbi->stat_lock);
2287
2288 out_unlock:
2289         f2fs_up_write(&sbi->gc_lock);
2290 restore_flag:
2291         sbi->gc_mode = gc_mode;
2292         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2293         return err;
2294 }
2295
2296 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2297 {
2298         int retry = DEFAULT_RETRY_IO_COUNT;
2299
2300         /* we should flush all the data to keep data consistency */
2301         do {
2302                 sync_inodes_sb(sbi->sb);
2303                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2304         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2305
2306         if (unlikely(retry < 0))
2307                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2308
2309         f2fs_down_write(&sbi->gc_lock);
2310         f2fs_dirty_to_prefree(sbi);
2311
2312         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2313         set_sbi_flag(sbi, SBI_IS_DIRTY);
2314         f2fs_up_write(&sbi->gc_lock);
2315
2316         f2fs_sync_fs(sbi->sb, 1);
2317
2318         /* Let's ensure there's no pending checkpoint anymore */
2319         f2fs_flush_ckpt_thread(sbi);
2320 }
2321
2322 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2323 {
2324         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2325         struct f2fs_mount_info org_mount_opt;
2326         unsigned long old_sb_flags;
2327         int err;
2328         bool need_restart_gc = false, need_stop_gc = false;
2329         bool need_restart_flush = false, need_stop_flush = false;
2330         bool need_restart_discard = false, need_stop_discard = false;
2331         bool need_enable_checkpoint = false, need_disable_checkpoint = false;
2332         bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2333         bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2334         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2335         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2336         bool no_atgc = !test_opt(sbi, ATGC);
2337         bool no_discard = !test_opt(sbi, DISCARD);
2338         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2339         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2340 #ifdef CONFIG_QUOTA
2341         int i, j;
2342 #endif
2343
2344         /*
2345          * Save the old mount options in case we
2346          * need to restore them.
2347          */
2348         org_mount_opt = sbi->mount_opt;
2349         old_sb_flags = sb->s_flags;
2350
2351 #ifdef CONFIG_QUOTA
2352         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2353         for (i = 0; i < MAXQUOTAS; i++) {
2354                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2355                         org_mount_opt.s_qf_names[i] =
2356                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2357                                 GFP_KERNEL);
2358                         if (!org_mount_opt.s_qf_names[i]) {
2359                                 for (j = 0; j < i; j++)
2360                                         kfree(org_mount_opt.s_qf_names[j]);
2361                                 return -ENOMEM;
2362                         }
2363                 } else {
2364                         org_mount_opt.s_qf_names[i] = NULL;
2365                 }
2366         }
2367 #endif
2368
2369         /* recover superblocks we couldn't write due to previous RO mount */
2370         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2371                 err = f2fs_commit_super(sbi, false);
2372                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2373                           err);
2374                 if (!err)
2375                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2376         }
2377
2378         default_options(sbi, true);
2379
2380         /* parse mount options */
2381         err = parse_options(sb, data, true);
2382         if (err)
2383                 goto restore_opts;
2384
2385         /* flush outstanding errors before changing fs state */
2386         flush_work(&sbi->s_error_work);
2387
2388         /*
2389          * Previous and new state of filesystem is RO,
2390          * so skip checking GC and FLUSH_MERGE conditions.
2391          */
2392         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2393                 goto skip;
2394
2395         if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
2396                 err = -EROFS;
2397                 goto restore_opts;
2398         }
2399
2400 #ifdef CONFIG_QUOTA
2401         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2402                 err = dquot_suspend(sb, -1);
2403                 if (err < 0)
2404                         goto restore_opts;
2405         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2406                 /* dquot_resume needs RW */
2407                 sb->s_flags &= ~SB_RDONLY;
2408                 if (sb_any_quota_suspended(sb)) {
2409                         dquot_resume(sb, -1);
2410                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2411                         err = f2fs_enable_quotas(sb);
2412                         if (err)
2413                                 goto restore_opts;
2414                 }
2415         }
2416 #endif
2417         if (f2fs_lfs_mode(sbi) && !IS_F2FS_IPU_DISABLE(sbi)) {
2418                 err = -EINVAL;
2419                 f2fs_warn(sbi, "LFS is not compatible with IPU");
2420                 goto restore_opts;
2421         }
2422
2423         /* disallow enable atgc dynamically */
2424         if (no_atgc == !!test_opt(sbi, ATGC)) {
2425                 err = -EINVAL;
2426                 f2fs_warn(sbi, "switch atgc option is not allowed");
2427                 goto restore_opts;
2428         }
2429
2430         /* disallow enable/disable extent_cache dynamically */
2431         if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2432                 err = -EINVAL;
2433                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2434                 goto restore_opts;
2435         }
2436         /* disallow enable/disable age extent_cache dynamically */
2437         if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2438                 err = -EINVAL;
2439                 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2440                 goto restore_opts;
2441         }
2442
2443         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2444                 err = -EINVAL;
2445                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2446                 goto restore_opts;
2447         }
2448
2449         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2450                 err = -EINVAL;
2451                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2452                 goto restore_opts;
2453         }
2454
2455         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2456                 err = -EINVAL;
2457                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2458                 goto restore_opts;
2459         }
2460
2461         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2462                 err = -EINVAL;
2463                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2464                 goto restore_opts;
2465         }
2466
2467         /*
2468          * We stop the GC thread if FS is mounted as RO
2469          * or if background_gc = off is passed in mount
2470          * option. Also sync the filesystem.
2471          */
2472         if ((*flags & SB_RDONLY) ||
2473                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2474                         !test_opt(sbi, GC_MERGE))) {
2475                 if (sbi->gc_thread) {
2476                         f2fs_stop_gc_thread(sbi);
2477                         need_restart_gc = true;
2478                 }
2479         } else if (!sbi->gc_thread) {
2480                 err = f2fs_start_gc_thread(sbi);
2481                 if (err)
2482                         goto restore_opts;
2483                 need_stop_gc = true;
2484         }
2485
2486         if (*flags & SB_RDONLY) {
2487                 sync_inodes_sb(sb);
2488
2489                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2490                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2491                 f2fs_sync_fs(sb, 1);
2492                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2493         }
2494
2495         /*
2496          * We stop issue flush thread if FS is mounted as RO
2497          * or if flush_merge is not passed in mount option.
2498          */
2499         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2500                 clear_opt(sbi, FLUSH_MERGE);
2501                 f2fs_destroy_flush_cmd_control(sbi, false);
2502                 need_restart_flush = true;
2503         } else {
2504                 err = f2fs_create_flush_cmd_control(sbi);
2505                 if (err)
2506                         goto restore_gc;
2507                 need_stop_flush = true;
2508         }
2509
2510         if (no_discard == !!test_opt(sbi, DISCARD)) {
2511                 if (test_opt(sbi, DISCARD)) {
2512                         err = f2fs_start_discard_thread(sbi);
2513                         if (err)
2514                                 goto restore_flush;
2515                         need_stop_discard = true;
2516                 } else {
2517                         f2fs_stop_discard_thread(sbi);
2518                         f2fs_issue_discard_timeout(sbi);
2519                         need_restart_discard = true;
2520                 }
2521         }
2522
2523         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2524                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2525                         err = f2fs_disable_checkpoint(sbi);
2526                         if (err)
2527                                 goto restore_discard;
2528                         need_enable_checkpoint = true;
2529                 } else {
2530                         f2fs_enable_checkpoint(sbi);
2531                         need_disable_checkpoint = true;
2532                 }
2533         }
2534
2535         /*
2536          * Place this routine at the end, since a new checkpoint would be
2537          * triggered while remount and we need to take care of it before
2538          * returning from remount.
2539          */
2540         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2541                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2542                 f2fs_stop_ckpt_thread(sbi);
2543         } else {
2544                 /* Flush if the prevous checkpoint, if exists. */
2545                 f2fs_flush_ckpt_thread(sbi);
2546
2547                 err = f2fs_start_ckpt_thread(sbi);
2548                 if (err) {
2549                         f2fs_err(sbi,
2550                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2551                             err);
2552                         goto restore_checkpoint;
2553                 }
2554         }
2555
2556 skip:
2557 #ifdef CONFIG_QUOTA
2558         /* Release old quota file names */
2559         for (i = 0; i < MAXQUOTAS; i++)
2560                 kfree(org_mount_opt.s_qf_names[i]);
2561 #endif
2562         /* Update the POSIXACL Flag */
2563         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2564                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2565
2566         limit_reserve_root(sbi);
2567         adjust_unusable_cap_perc(sbi);
2568         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2569         return 0;
2570 restore_checkpoint:
2571         if (need_enable_checkpoint) {
2572                 f2fs_enable_checkpoint(sbi);
2573         } else if (need_disable_checkpoint) {
2574                 if (f2fs_disable_checkpoint(sbi))
2575                         f2fs_warn(sbi, "checkpoint has not been disabled");
2576         }
2577 restore_discard:
2578         if (need_restart_discard) {
2579                 if (f2fs_start_discard_thread(sbi))
2580                         f2fs_warn(sbi, "discard has been stopped");
2581         } else if (need_stop_discard) {
2582                 f2fs_stop_discard_thread(sbi);
2583         }
2584 restore_flush:
2585         if (need_restart_flush) {
2586                 if (f2fs_create_flush_cmd_control(sbi))
2587                         f2fs_warn(sbi, "background flush thread has stopped");
2588         } else if (need_stop_flush) {
2589                 clear_opt(sbi, FLUSH_MERGE);
2590                 f2fs_destroy_flush_cmd_control(sbi, false);
2591         }
2592 restore_gc:
2593         if (need_restart_gc) {
2594                 if (f2fs_start_gc_thread(sbi))
2595                         f2fs_warn(sbi, "background gc thread has stopped");
2596         } else if (need_stop_gc) {
2597                 f2fs_stop_gc_thread(sbi);
2598         }
2599 restore_opts:
2600 #ifdef CONFIG_QUOTA
2601         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2602         for (i = 0; i < MAXQUOTAS; i++) {
2603                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2604                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2605         }
2606 #endif
2607         sbi->mount_opt = org_mount_opt;
2608         sb->s_flags = old_sb_flags;
2609         return err;
2610 }
2611
2612 #ifdef CONFIG_QUOTA
2613 static bool f2fs_need_recovery(struct f2fs_sb_info *sbi)
2614 {
2615         /* need to recovery orphan */
2616         if (is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
2617                 return true;
2618         /* need to recovery data */
2619         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2620                 return false;
2621         if (test_opt(sbi, NORECOVERY))
2622                 return false;
2623         return !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG);
2624 }
2625
2626 static bool f2fs_recover_quota_begin(struct f2fs_sb_info *sbi)
2627 {
2628         bool readonly = f2fs_readonly(sbi->sb);
2629
2630         if (!f2fs_need_recovery(sbi))
2631                 return false;
2632
2633         /* it doesn't need to check f2fs_sb_has_readonly() */
2634         if (f2fs_hw_is_readonly(sbi))
2635                 return false;
2636
2637         if (readonly) {
2638                 sbi->sb->s_flags &= ~SB_RDONLY;
2639                 set_sbi_flag(sbi, SBI_IS_WRITABLE);
2640         }
2641
2642         /*
2643          * Turn on quotas which were not enabled for read-only mounts if
2644          * filesystem has quota feature, so that they are updated correctly.
2645          */
2646         return f2fs_enable_quota_files(sbi, readonly);
2647 }
2648
2649 static void f2fs_recover_quota_end(struct f2fs_sb_info *sbi,
2650                                                 bool quota_enabled)
2651 {
2652         if (quota_enabled)
2653                 f2fs_quota_off_umount(sbi->sb);
2654
2655         if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE)) {
2656                 clear_sbi_flag(sbi, SBI_IS_WRITABLE);
2657                 sbi->sb->s_flags |= SB_RDONLY;
2658         }
2659 }
2660
2661 /* Read data from quotafile */
2662 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2663                                size_t len, loff_t off)
2664 {
2665         struct inode *inode = sb_dqopt(sb)->files[type];
2666         struct address_space *mapping = inode->i_mapping;
2667         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2668         int offset = off & (sb->s_blocksize - 1);
2669         int tocopy;
2670         size_t toread;
2671         loff_t i_size = i_size_read(inode);
2672         struct page *page;
2673
2674         if (off > i_size)
2675                 return 0;
2676
2677         if (off + len > i_size)
2678                 len = i_size - off;
2679         toread = len;
2680         while (toread > 0) {
2681                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2682 repeat:
2683                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2684                 if (IS_ERR(page)) {
2685                         if (PTR_ERR(page) == -ENOMEM) {
2686                                 memalloc_retry_wait(GFP_NOFS);
2687                                 goto repeat;
2688                         }
2689                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2690                         return PTR_ERR(page);
2691                 }
2692
2693                 lock_page(page);
2694
2695                 if (unlikely(page->mapping != mapping)) {
2696                         f2fs_put_page(page, 1);
2697                         goto repeat;
2698                 }
2699                 if (unlikely(!PageUptodate(page))) {
2700                         f2fs_put_page(page, 1);
2701                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2702                         return -EIO;
2703                 }
2704
2705                 memcpy_from_page(data, page, offset, tocopy);
2706                 f2fs_put_page(page, 1);
2707
2708                 offset = 0;
2709                 toread -= tocopy;
2710                 data += tocopy;
2711                 blkidx++;
2712         }
2713         return len;
2714 }
2715
2716 /* Write to quotafile */
2717 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2718                                 const char *data, size_t len, loff_t off)
2719 {
2720         struct inode *inode = sb_dqopt(sb)->files[type];
2721         struct address_space *mapping = inode->i_mapping;
2722         const struct address_space_operations *a_ops = mapping->a_ops;
2723         int offset = off & (sb->s_blocksize - 1);
2724         size_t towrite = len;
2725         struct page *page;
2726         void *fsdata = NULL;
2727         int err = 0;
2728         int tocopy;
2729
2730         while (towrite > 0) {
2731                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2732                                                                 towrite);
2733 retry:
2734                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2735                                                         &page, &fsdata);
2736                 if (unlikely(err)) {
2737                         if (err == -ENOMEM) {
2738                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2739                                 goto retry;
2740                         }
2741                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2742                         break;
2743                 }
2744
2745                 memcpy_to_page(page, offset, data, tocopy);
2746
2747                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2748                                                 page, fsdata);
2749                 offset = 0;
2750                 towrite -= tocopy;
2751                 off += tocopy;
2752                 data += tocopy;
2753                 cond_resched();
2754         }
2755
2756         if (len == towrite)
2757                 return err;
2758         inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
2759         f2fs_mark_inode_dirty_sync(inode, false);
2760         return len - towrite;
2761 }
2762
2763 int f2fs_dquot_initialize(struct inode *inode)
2764 {
2765         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT))
2766                 return -ESRCH;
2767
2768         return dquot_initialize(inode);
2769 }
2770
2771 static struct dquot __rcu **f2fs_get_dquots(struct inode *inode)
2772 {
2773         return F2FS_I(inode)->i_dquot;
2774 }
2775
2776 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2777 {
2778         return &F2FS_I(inode)->i_reserved_quota;
2779 }
2780
2781 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2782 {
2783         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2784                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2785                 return 0;
2786         }
2787
2788         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2789                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2790 }
2791
2792 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2793 {
2794         int enabled = 0;
2795         int i, err;
2796
2797         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2798                 err = f2fs_enable_quotas(sbi->sb);
2799                 if (err) {
2800                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2801                         return 0;
2802                 }
2803                 return 1;
2804         }
2805
2806         for (i = 0; i < MAXQUOTAS; i++) {
2807                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2808                         err = f2fs_quota_on_mount(sbi, i);
2809                         if (!err) {
2810                                 enabled = 1;
2811                                 continue;
2812                         }
2813                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2814                                  err, i);
2815                 }
2816         }
2817         return enabled;
2818 }
2819
2820 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2821                              unsigned int flags)
2822 {
2823         struct inode *qf_inode;
2824         unsigned long qf_inum;
2825         unsigned long qf_flag = F2FS_QUOTA_DEFAULT_FL;
2826         int err;
2827
2828         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2829
2830         qf_inum = f2fs_qf_ino(sb, type);
2831         if (!qf_inum)
2832                 return -EPERM;
2833
2834         qf_inode = f2fs_iget(sb, qf_inum);
2835         if (IS_ERR(qf_inode)) {
2836                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2837                 return PTR_ERR(qf_inode);
2838         }
2839
2840         /* Don't account quota for quota files to avoid recursion */
2841         inode_lock(qf_inode);
2842         qf_inode->i_flags |= S_NOQUOTA;
2843
2844         if ((F2FS_I(qf_inode)->i_flags & qf_flag) != qf_flag) {
2845                 F2FS_I(qf_inode)->i_flags |= qf_flag;
2846                 f2fs_set_inode_flags(qf_inode);
2847         }
2848         inode_unlock(qf_inode);
2849
2850         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2851         iput(qf_inode);
2852         return err;
2853 }
2854
2855 static int f2fs_enable_quotas(struct super_block *sb)
2856 {
2857         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2858         int type, err = 0;
2859         unsigned long qf_inum;
2860         bool quota_mopt[MAXQUOTAS] = {
2861                 test_opt(sbi, USRQUOTA),
2862                 test_opt(sbi, GRPQUOTA),
2863                 test_opt(sbi, PRJQUOTA),
2864         };
2865
2866         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2867                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2868                 return 0;
2869         }
2870
2871         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2872
2873         for (type = 0; type < MAXQUOTAS; type++) {
2874                 qf_inum = f2fs_qf_ino(sb, type);
2875                 if (qf_inum) {
2876                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2877                                 DQUOT_USAGE_ENABLED |
2878                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2879                         if (err) {
2880                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2881                                          type, err);
2882                                 for (type--; type >= 0; type--)
2883                                         dquot_quota_off(sb, type);
2884                                 set_sbi_flag(F2FS_SB(sb),
2885                                                 SBI_QUOTA_NEED_REPAIR);
2886                                 return err;
2887                         }
2888                 }
2889         }
2890         return 0;
2891 }
2892
2893 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2894 {
2895         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2896         struct address_space *mapping = dqopt->files[type]->i_mapping;
2897         int ret = 0;
2898
2899         ret = dquot_writeback_dquots(sbi->sb, type);
2900         if (ret)
2901                 goto out;
2902
2903         ret = filemap_fdatawrite(mapping);
2904         if (ret)
2905                 goto out;
2906
2907         /* if we are using journalled quota */
2908         if (is_journalled_quota(sbi))
2909                 goto out;
2910
2911         ret = filemap_fdatawait(mapping);
2912
2913         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2914 out:
2915         if (ret)
2916                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2917         return ret;
2918 }
2919
2920 int f2fs_quota_sync(struct super_block *sb, int type)
2921 {
2922         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2923         struct quota_info *dqopt = sb_dqopt(sb);
2924         int cnt;
2925         int ret = 0;
2926
2927         /*
2928          * Now when everything is written we can discard the pagecache so
2929          * that userspace sees the changes.
2930          */
2931         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2932
2933                 if (type != -1 && cnt != type)
2934                         continue;
2935
2936                 if (!sb_has_quota_active(sb, cnt))
2937                         continue;
2938
2939                 if (!f2fs_sb_has_quota_ino(sbi))
2940                         inode_lock(dqopt->files[cnt]);
2941
2942                 /*
2943                  * do_quotactl
2944                  *  f2fs_quota_sync
2945                  *  f2fs_down_read(quota_sem)
2946                  *  dquot_writeback_dquots()
2947                  *  f2fs_dquot_commit
2948                  *                            block_operation
2949                  *                            f2fs_down_read(quota_sem)
2950                  */
2951                 f2fs_lock_op(sbi);
2952                 f2fs_down_read(&sbi->quota_sem);
2953
2954                 ret = f2fs_quota_sync_file(sbi, cnt);
2955
2956                 f2fs_up_read(&sbi->quota_sem);
2957                 f2fs_unlock_op(sbi);
2958
2959                 if (!f2fs_sb_has_quota_ino(sbi))
2960                         inode_unlock(dqopt->files[cnt]);
2961
2962                 if (ret)
2963                         break;
2964         }
2965         return ret;
2966 }
2967
2968 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2969                                                         const struct path *path)
2970 {
2971         struct inode *inode;
2972         int err;
2973
2974         /* if quota sysfile exists, deny enabling quota with specific file */
2975         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2976                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2977                 return -EBUSY;
2978         }
2979
2980         if (path->dentry->d_sb != sb)
2981                 return -EXDEV;
2982
2983         err = f2fs_quota_sync(sb, type);
2984         if (err)
2985                 return err;
2986
2987         inode = d_inode(path->dentry);
2988
2989         err = filemap_fdatawrite(inode->i_mapping);
2990         if (err)
2991                 return err;
2992
2993         err = filemap_fdatawait(inode->i_mapping);
2994         if (err)
2995                 return err;
2996
2997         err = dquot_quota_on(sb, type, format_id, path);
2998         if (err)
2999                 return err;
3000
3001         inode_lock(inode);
3002         F2FS_I(inode)->i_flags |= F2FS_QUOTA_DEFAULT_FL;
3003         f2fs_set_inode_flags(inode);
3004         inode_unlock(inode);
3005         f2fs_mark_inode_dirty_sync(inode, false);
3006
3007         return 0;
3008 }
3009
3010 static int __f2fs_quota_off(struct super_block *sb, int type)
3011 {
3012         struct inode *inode = sb_dqopt(sb)->files[type];
3013         int err;
3014
3015         if (!inode || !igrab(inode))
3016                 return dquot_quota_off(sb, type);
3017
3018         err = f2fs_quota_sync(sb, type);
3019         if (err)
3020                 goto out_put;
3021
3022         err = dquot_quota_off(sb, type);
3023         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
3024                 goto out_put;
3025
3026         inode_lock(inode);
3027         F2FS_I(inode)->i_flags &= ~F2FS_QUOTA_DEFAULT_FL;
3028         f2fs_set_inode_flags(inode);
3029         inode_unlock(inode);
3030         f2fs_mark_inode_dirty_sync(inode, false);
3031 out_put:
3032         iput(inode);
3033         return err;
3034 }
3035
3036 static int f2fs_quota_off(struct super_block *sb, int type)
3037 {
3038         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3039         int err;
3040
3041         err = __f2fs_quota_off(sb, type);
3042
3043         /*
3044          * quotactl can shutdown journalled quota, result in inconsistence
3045          * between quota record and fs data by following updates, tag the
3046          * flag to let fsck be aware of it.
3047          */
3048         if (is_journalled_quota(sbi))
3049                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3050         return err;
3051 }
3052
3053 void f2fs_quota_off_umount(struct super_block *sb)
3054 {
3055         int type;
3056         int err;
3057
3058         for (type = 0; type < MAXQUOTAS; type++) {
3059                 err = __f2fs_quota_off(sb, type);
3060                 if (err) {
3061                         int ret = dquot_quota_off(sb, type);
3062
3063                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
3064                                  type, err, ret);
3065                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
3066                 }
3067         }
3068         /*
3069          * In case of checkpoint=disable, we must flush quota blocks.
3070          * This can cause NULL exception for node_inode in end_io, since
3071          * put_super already dropped it.
3072          */
3073         sync_filesystem(sb);
3074 }
3075
3076 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
3077 {
3078         struct quota_info *dqopt = sb_dqopt(sb);
3079         int type;
3080
3081         for (type = 0; type < MAXQUOTAS; type++) {
3082                 if (!dqopt->files[type])
3083                         continue;
3084                 f2fs_inode_synced(dqopt->files[type]);
3085         }
3086 }
3087
3088 static int f2fs_dquot_commit(struct dquot *dquot)
3089 {
3090         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3091         int ret;
3092
3093         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
3094         ret = dquot_commit(dquot);
3095         if (ret < 0)
3096                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3097         f2fs_up_read(&sbi->quota_sem);
3098         return ret;
3099 }
3100
3101 static int f2fs_dquot_acquire(struct dquot *dquot)
3102 {
3103         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3104         int ret;
3105
3106         f2fs_down_read(&sbi->quota_sem);
3107         ret = dquot_acquire(dquot);
3108         if (ret < 0)
3109                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3110         f2fs_up_read(&sbi->quota_sem);
3111         return ret;
3112 }
3113
3114 static int f2fs_dquot_release(struct dquot *dquot)
3115 {
3116         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3117         int ret = dquot_release(dquot);
3118
3119         if (ret < 0)
3120                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3121         return ret;
3122 }
3123
3124 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
3125 {
3126         struct super_block *sb = dquot->dq_sb;
3127         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3128         int ret = dquot_mark_dquot_dirty(dquot);
3129
3130         /* if we are using journalled quota */
3131         if (is_journalled_quota(sbi))
3132                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
3133
3134         return ret;
3135 }
3136
3137 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
3138 {
3139         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3140         int ret = dquot_commit_info(sb, type);
3141
3142         if (ret < 0)
3143                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3144         return ret;
3145 }
3146
3147 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
3148 {
3149         *projid = F2FS_I(inode)->i_projid;
3150         return 0;
3151 }
3152
3153 static const struct dquot_operations f2fs_quota_operations = {
3154         .get_reserved_space = f2fs_get_reserved_space,
3155         .write_dquot    = f2fs_dquot_commit,
3156         .acquire_dquot  = f2fs_dquot_acquire,
3157         .release_dquot  = f2fs_dquot_release,
3158         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
3159         .write_info     = f2fs_dquot_commit_info,
3160         .alloc_dquot    = dquot_alloc,
3161         .destroy_dquot  = dquot_destroy,
3162         .get_projid     = f2fs_get_projid,
3163         .get_next_id    = dquot_get_next_id,
3164 };
3165
3166 static const struct quotactl_ops f2fs_quotactl_ops = {
3167         .quota_on       = f2fs_quota_on,
3168         .quota_off      = f2fs_quota_off,
3169         .quota_sync     = f2fs_quota_sync,
3170         .get_state      = dquot_get_state,
3171         .set_info       = dquot_set_dqinfo,
3172         .get_dqblk      = dquot_get_dqblk,
3173         .set_dqblk      = dquot_set_dqblk,
3174         .get_nextdqblk  = dquot_get_next_dqblk,
3175 };
3176 #else
3177 int f2fs_dquot_initialize(struct inode *inode)
3178 {
3179         return 0;
3180 }
3181
3182 int f2fs_quota_sync(struct super_block *sb, int type)
3183 {
3184         return 0;
3185 }
3186
3187 void f2fs_quota_off_umount(struct super_block *sb)
3188 {
3189 }
3190 #endif
3191
3192 static const struct super_operations f2fs_sops = {
3193         .alloc_inode    = f2fs_alloc_inode,
3194         .free_inode     = f2fs_free_inode,
3195         .drop_inode     = f2fs_drop_inode,
3196         .write_inode    = f2fs_write_inode,
3197         .dirty_inode    = f2fs_dirty_inode,
3198         .show_options   = f2fs_show_options,
3199 #ifdef CONFIG_QUOTA
3200         .quota_read     = f2fs_quota_read,
3201         .quota_write    = f2fs_quota_write,
3202         .get_dquots     = f2fs_get_dquots,
3203 #endif
3204         .evict_inode    = f2fs_evict_inode,
3205         .put_super      = f2fs_put_super,
3206         .sync_fs        = f2fs_sync_fs,
3207         .freeze_fs      = f2fs_freeze,
3208         .unfreeze_fs    = f2fs_unfreeze,
3209         .statfs         = f2fs_statfs,
3210         .remount_fs     = f2fs_remount,
3211 };
3212
3213 #ifdef CONFIG_FS_ENCRYPTION
3214 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3215 {
3216         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3217                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3218                                 ctx, len, NULL);
3219 }
3220
3221 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3222                                                         void *fs_data)
3223 {
3224         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3225
3226         /*
3227          * Encrypting the root directory is not allowed because fsck
3228          * expects lost+found directory to exist and remain unencrypted
3229          * if LOST_FOUND feature is enabled.
3230          *
3231          */
3232         if (f2fs_sb_has_lost_found(sbi) &&
3233                         inode->i_ino == F2FS_ROOT_INO(sbi))
3234                 return -EPERM;
3235
3236         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3237                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3238                                 ctx, len, fs_data, XATTR_CREATE);
3239 }
3240
3241 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3242 {
3243         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3244 }
3245
3246 static bool f2fs_has_stable_inodes(struct super_block *sb)
3247 {
3248         return true;
3249 }
3250
3251 static struct block_device **f2fs_get_devices(struct super_block *sb,
3252                                               unsigned int *num_devs)
3253 {
3254         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3255         struct block_device **devs;
3256         int i;
3257
3258         if (!f2fs_is_multi_device(sbi))
3259                 return NULL;
3260
3261         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3262         if (!devs)
3263                 return ERR_PTR(-ENOMEM);
3264
3265         for (i = 0; i < sbi->s_ndevs; i++)
3266                 devs[i] = FDEV(i).bdev;
3267         *num_devs = sbi->s_ndevs;
3268         return devs;
3269 }
3270
3271 static const struct fscrypt_operations f2fs_cryptops = {
3272         .needs_bounce_pages     = 1,
3273         .has_32bit_inodes       = 1,
3274         .supports_subblock_data_units = 1,
3275         .legacy_key_prefix      = "f2fs:",
3276         .get_context            = f2fs_get_context,
3277         .set_context            = f2fs_set_context,
3278         .get_dummy_policy       = f2fs_get_dummy_policy,
3279         .empty_dir              = f2fs_empty_dir,
3280         .has_stable_inodes      = f2fs_has_stable_inodes,
3281         .get_devices            = f2fs_get_devices,
3282 };
3283 #endif
3284
3285 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3286                 u64 ino, u32 generation)
3287 {
3288         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3289         struct inode *inode;
3290
3291         if (f2fs_check_nid_range(sbi, ino))
3292                 return ERR_PTR(-ESTALE);
3293
3294         /*
3295          * f2fs_iget isn't quite right if the inode is currently unallocated!
3296          * However f2fs_iget currently does appropriate checks to handle stale
3297          * inodes so everything is OK.
3298          */
3299         inode = f2fs_iget(sb, ino);
3300         if (IS_ERR(inode))
3301                 return ERR_CAST(inode);
3302         if (unlikely(generation && inode->i_generation != generation)) {
3303                 /* we didn't find the right inode.. */
3304                 iput(inode);
3305                 return ERR_PTR(-ESTALE);
3306         }
3307         return inode;
3308 }
3309
3310 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3311                 int fh_len, int fh_type)
3312 {
3313         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3314                                     f2fs_nfs_get_inode);
3315 }
3316
3317 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3318                 int fh_len, int fh_type)
3319 {
3320         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3321                                     f2fs_nfs_get_inode);
3322 }
3323
3324 static const struct export_operations f2fs_export_ops = {
3325         .encode_fh = generic_encode_ino32_fh,
3326         .fh_to_dentry = f2fs_fh_to_dentry,
3327         .fh_to_parent = f2fs_fh_to_parent,
3328         .get_parent = f2fs_get_parent,
3329 };
3330
3331 loff_t max_file_blocks(struct inode *inode)
3332 {
3333         loff_t result = 0;
3334         loff_t leaf_count;
3335
3336         /*
3337          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3338          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3339          * space in inode.i_addr, it will be more safe to reassign
3340          * result as zero.
3341          */
3342
3343         if (inode && f2fs_compressed_file(inode))
3344                 leaf_count = ADDRS_PER_BLOCK(inode);
3345         else
3346                 leaf_count = DEF_ADDRS_PER_BLOCK;
3347
3348         /* two direct node blocks */
3349         result += (leaf_count * 2);
3350
3351         /* two indirect node blocks */
3352         leaf_count *= NIDS_PER_BLOCK;
3353         result += (leaf_count * 2);
3354
3355         /* one double indirect node block */
3356         leaf_count *= NIDS_PER_BLOCK;
3357         result += leaf_count;
3358
3359         /*
3360          * For compatibility with FSCRYPT_POLICY_FLAG_IV_INO_LBLK_{64,32} with
3361          * a 4K crypto data unit, we must restrict the max filesize to what can
3362          * fit within U32_MAX + 1 data units.
3363          */
3364
3365         result = min(result, (((loff_t)U32_MAX + 1) * 4096) >> F2FS_BLKSIZE_BITS);
3366
3367         return result;
3368 }
3369
3370 static int __f2fs_commit_super(struct buffer_head *bh,
3371                         struct f2fs_super_block *super)
3372 {
3373         lock_buffer(bh);
3374         if (super)
3375                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3376         set_buffer_dirty(bh);
3377         unlock_buffer(bh);
3378
3379         /* it's rare case, we can do fua all the time */
3380         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3381 }
3382
3383 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3384                                         struct buffer_head *bh)
3385 {
3386         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3387                                         (bh->b_data + F2FS_SUPER_OFFSET);
3388         struct super_block *sb = sbi->sb;
3389         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3390         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3391         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3392         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3393         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3394         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3395         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3396         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3397         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3398         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3399         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3400         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3401         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3402         u64 main_end_blkaddr = main_blkaddr +
3403                                 (segment_count_main << log_blocks_per_seg);
3404         u64 seg_end_blkaddr = segment0_blkaddr +
3405                                 (segment_count << log_blocks_per_seg);
3406
3407         if (segment0_blkaddr != cp_blkaddr) {
3408                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3409                           segment0_blkaddr, cp_blkaddr);
3410                 return true;
3411         }
3412
3413         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3414                                                         sit_blkaddr) {
3415                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3416                           cp_blkaddr, sit_blkaddr,
3417                           segment_count_ckpt << log_blocks_per_seg);
3418                 return true;
3419         }
3420
3421         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3422                                                         nat_blkaddr) {
3423                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3424                           sit_blkaddr, nat_blkaddr,
3425                           segment_count_sit << log_blocks_per_seg);
3426                 return true;
3427         }
3428
3429         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3430                                                         ssa_blkaddr) {
3431                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3432                           nat_blkaddr, ssa_blkaddr,
3433                           segment_count_nat << log_blocks_per_seg);
3434                 return true;
3435         }
3436
3437         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3438                                                         main_blkaddr) {
3439                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3440                           ssa_blkaddr, main_blkaddr,
3441                           segment_count_ssa << log_blocks_per_seg);
3442                 return true;
3443         }
3444
3445         if (main_end_blkaddr > seg_end_blkaddr) {
3446                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3447                           main_blkaddr, seg_end_blkaddr,
3448                           segment_count_main << log_blocks_per_seg);
3449                 return true;
3450         } else if (main_end_blkaddr < seg_end_blkaddr) {
3451                 int err = 0;
3452                 char *res;
3453
3454                 /* fix in-memory information all the time */
3455                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3456                                 segment0_blkaddr) >> log_blocks_per_seg);
3457
3458                 if (f2fs_readonly(sb) || f2fs_hw_is_readonly(sbi)) {
3459                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3460                         res = "internally";
3461                 } else {
3462                         err = __f2fs_commit_super(bh, NULL);
3463                         res = err ? "failed" : "done";
3464                 }
3465                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3466                           res, main_blkaddr, seg_end_blkaddr,
3467                           segment_count_main << log_blocks_per_seg);
3468                 if (err)
3469                         return true;
3470         }
3471         return false;
3472 }
3473
3474 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3475                                 struct buffer_head *bh)
3476 {
3477         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3478         block_t total_sections, blocks_per_seg;
3479         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3480                                         (bh->b_data + F2FS_SUPER_OFFSET);
3481         size_t crc_offset = 0;
3482         __u32 crc = 0;
3483
3484         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3485                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3486                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3487                 return -EINVAL;
3488         }
3489
3490         /* Check checksum_offset and crc in superblock */
3491         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3492                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3493                 if (crc_offset !=
3494                         offsetof(struct f2fs_super_block, crc)) {
3495                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3496                                   crc_offset);
3497                         return -EFSCORRUPTED;
3498                 }
3499                 crc = le32_to_cpu(raw_super->crc);
3500                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3501                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3502                         return -EFSCORRUPTED;
3503                 }
3504         }
3505
3506         /* Currently, support only 4KB block size */
3507         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3508                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3509                           le32_to_cpu(raw_super->log_blocksize),
3510                           F2FS_BLKSIZE_BITS);
3511                 return -EFSCORRUPTED;
3512         }
3513
3514         /* check log blocks per segment */
3515         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3516                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3517                           le32_to_cpu(raw_super->log_blocks_per_seg));
3518                 return -EFSCORRUPTED;
3519         }
3520
3521         /* Currently, support 512/1024/2048/4096/16K bytes sector size */
3522         if (le32_to_cpu(raw_super->log_sectorsize) >
3523                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3524                 le32_to_cpu(raw_super->log_sectorsize) <
3525                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3526                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3527                           le32_to_cpu(raw_super->log_sectorsize));
3528                 return -EFSCORRUPTED;
3529         }
3530         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3531                 le32_to_cpu(raw_super->log_sectorsize) !=
3532                         F2FS_MAX_LOG_SECTOR_SIZE) {
3533                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3534                           le32_to_cpu(raw_super->log_sectors_per_block),
3535                           le32_to_cpu(raw_super->log_sectorsize));
3536                 return -EFSCORRUPTED;
3537         }
3538
3539         segment_count = le32_to_cpu(raw_super->segment_count);
3540         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3541         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3542         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3543         total_sections = le32_to_cpu(raw_super->section_count);
3544
3545         /* blocks_per_seg should be 512, given the above check */
3546         blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg));
3547
3548         if (segment_count > F2FS_MAX_SEGMENT ||
3549                                 segment_count < F2FS_MIN_SEGMENTS) {
3550                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3551                 return -EFSCORRUPTED;
3552         }
3553
3554         if (total_sections > segment_count_main || total_sections < 1 ||
3555                         segs_per_sec > segment_count || !segs_per_sec) {
3556                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3557                           segment_count, total_sections, segs_per_sec);
3558                 return -EFSCORRUPTED;
3559         }
3560
3561         if (segment_count_main != total_sections * segs_per_sec) {
3562                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3563                           segment_count_main, total_sections, segs_per_sec);
3564                 return -EFSCORRUPTED;
3565         }
3566
3567         if ((segment_count / segs_per_sec) < total_sections) {
3568                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3569                           segment_count, segs_per_sec, total_sections);
3570                 return -EFSCORRUPTED;
3571         }
3572
3573         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3574                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3575                           segment_count, le64_to_cpu(raw_super->block_count));
3576                 return -EFSCORRUPTED;
3577         }
3578
3579         if (RDEV(0).path[0]) {
3580                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3581                 int i = 1;
3582
3583                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3584                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3585                         i++;
3586                 }
3587                 if (segment_count != dev_seg_count) {
3588                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3589                                         segment_count, dev_seg_count);
3590                         return -EFSCORRUPTED;
3591                 }
3592         } else {
3593                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3594                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3595                         f2fs_info(sbi, "Zoned block device path is missing");
3596                         return -EFSCORRUPTED;
3597                 }
3598         }
3599
3600         if (secs_per_zone > total_sections || !secs_per_zone) {
3601                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3602                           secs_per_zone, total_sections);
3603                 return -EFSCORRUPTED;
3604         }
3605         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3606                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3607                         (le32_to_cpu(raw_super->extension_count) +
3608                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3609                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3610                           le32_to_cpu(raw_super->extension_count),
3611                           raw_super->hot_ext_count,
3612                           F2FS_MAX_EXTENSION);
3613                 return -EFSCORRUPTED;
3614         }
3615
3616         if (le32_to_cpu(raw_super->cp_payload) >=
3617                                 (blocks_per_seg - F2FS_CP_PACKS -
3618                                 NR_CURSEG_PERSIST_TYPE)) {
3619                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3620                           le32_to_cpu(raw_super->cp_payload),
3621                           blocks_per_seg - F2FS_CP_PACKS -
3622                           NR_CURSEG_PERSIST_TYPE);
3623                 return -EFSCORRUPTED;
3624         }
3625
3626         /* check reserved ino info */
3627         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3628                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3629                 le32_to_cpu(raw_super->root_ino) != 3) {
3630                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3631                           le32_to_cpu(raw_super->node_ino),
3632                           le32_to_cpu(raw_super->meta_ino),
3633                           le32_to_cpu(raw_super->root_ino));
3634                 return -EFSCORRUPTED;
3635         }
3636
3637         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3638         if (sanity_check_area_boundary(sbi, bh))
3639                 return -EFSCORRUPTED;
3640
3641         return 0;
3642 }
3643
3644 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3645 {
3646         unsigned int total, fsmeta;
3647         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3648         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3649         unsigned int ovp_segments, reserved_segments;
3650         unsigned int main_segs, blocks_per_seg;
3651         unsigned int sit_segs, nat_segs;
3652         unsigned int sit_bitmap_size, nat_bitmap_size;
3653         unsigned int log_blocks_per_seg;
3654         unsigned int segment_count_main;
3655         unsigned int cp_pack_start_sum, cp_payload;
3656         block_t user_block_count, valid_user_blocks;
3657         block_t avail_node_count, valid_node_count;
3658         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3659         int i, j;
3660
3661         total = le32_to_cpu(raw_super->segment_count);
3662         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3663         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3664         fsmeta += sit_segs;
3665         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3666         fsmeta += nat_segs;
3667         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3668         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3669
3670         if (unlikely(fsmeta >= total))
3671                 return 1;
3672
3673         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3674         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3675
3676         if (!f2fs_sb_has_readonly(sbi) &&
3677                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3678                         ovp_segments == 0 || reserved_segments == 0)) {
3679                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3680                 return 1;
3681         }
3682         user_block_count = le64_to_cpu(ckpt->user_block_count);
3683         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3684                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3685         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3686         if (!user_block_count || user_block_count >=
3687                         segment_count_main << log_blocks_per_seg) {
3688                 f2fs_err(sbi, "Wrong user_block_count: %u",
3689                          user_block_count);
3690                 return 1;
3691         }
3692
3693         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3694         if (valid_user_blocks > user_block_count) {
3695                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3696                          valid_user_blocks, user_block_count);
3697                 return 1;
3698         }
3699
3700         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3701         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3702         if (valid_node_count > avail_node_count) {
3703                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3704                          valid_node_count, avail_node_count);
3705                 return 1;
3706         }
3707
3708         main_segs = le32_to_cpu(raw_super->segment_count_main);
3709         blocks_per_seg = sbi->blocks_per_seg;
3710
3711         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3712                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3713                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3714                         return 1;
3715
3716                 if (f2fs_sb_has_readonly(sbi))
3717                         goto check_data;
3718
3719                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3720                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3721                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3722                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3723                                          i, j,
3724                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3725                                 return 1;
3726                         }
3727                 }
3728         }
3729 check_data:
3730         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3731                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3732                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3733                         return 1;
3734
3735                 if (f2fs_sb_has_readonly(sbi))
3736                         goto skip_cross;
3737
3738                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3739                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3740                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3741                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3742                                          i, j,
3743                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3744                                 return 1;
3745                         }
3746                 }
3747         }
3748         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3749                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3750                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3751                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3752                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3753                                          i, j,
3754                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3755                                 return 1;
3756                         }
3757                 }
3758         }
3759 skip_cross:
3760         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3761         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3762
3763         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3764                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3765                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3766                          sit_bitmap_size, nat_bitmap_size);
3767                 return 1;
3768         }
3769
3770         cp_pack_start_sum = __start_sum_addr(sbi);
3771         cp_payload = __cp_payload(sbi);
3772         if (cp_pack_start_sum < cp_payload + 1 ||
3773                 cp_pack_start_sum > blocks_per_seg - 1 -
3774                         NR_CURSEG_PERSIST_TYPE) {
3775                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3776                          cp_pack_start_sum);
3777                 return 1;
3778         }
3779
3780         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3781                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3782                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3783                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3784                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3785                           le32_to_cpu(ckpt->checksum_offset));
3786                 return 1;
3787         }
3788
3789         nat_blocks = nat_segs << log_blocks_per_seg;
3790         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3791         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3792         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3793                 (cp_payload + F2FS_CP_PACKS +
3794                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3795                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3796                           cp_payload, nat_bits_blocks);
3797                 return 1;
3798         }
3799
3800         if (unlikely(f2fs_cp_error(sbi))) {
3801                 f2fs_err(sbi, "A bug case: need to run fsck");
3802                 return 1;
3803         }
3804         return 0;
3805 }
3806
3807 static void init_sb_info(struct f2fs_sb_info *sbi)
3808 {
3809         struct f2fs_super_block *raw_super = sbi->raw_super;
3810         int i;
3811
3812         sbi->log_sectors_per_block =
3813                 le32_to_cpu(raw_super->log_sectors_per_block);
3814         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3815         sbi->blocksize = BIT(sbi->log_blocksize);
3816         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3817         sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg);
3818         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3819         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3820         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3821         sbi->total_node_count =
3822                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3823                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3824         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3825         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3826         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3827         sbi->cur_victim_sec = NULL_SECNO;
3828         sbi->gc_mode = GC_NORMAL;
3829         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3830         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3831         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3832         sbi->migration_granularity = sbi->segs_per_sec;
3833         sbi->seq_file_ra_mul = MIN_RA_MUL;
3834         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3835         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3836         spin_lock_init(&sbi->gc_remaining_trials_lock);
3837         atomic64_set(&sbi->current_atomic_write, 0);
3838
3839         sbi->dir_level = DEF_DIR_LEVEL;
3840         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3841         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3842         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3843         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3844         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3845         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3846                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3847         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3848
3849         for (i = 0; i < NR_COUNT_TYPE; i++)
3850                 atomic_set(&sbi->nr_pages[i], 0);
3851
3852         for (i = 0; i < META; i++)
3853                 atomic_set(&sbi->wb_sync_req[i], 0);
3854
3855         INIT_LIST_HEAD(&sbi->s_list);
3856         mutex_init(&sbi->umount_mutex);
3857         init_f2fs_rwsem(&sbi->io_order_lock);
3858         spin_lock_init(&sbi->cp_lock);
3859
3860         sbi->dirty_device = 0;
3861         spin_lock_init(&sbi->dev_lock);
3862
3863         init_f2fs_rwsem(&sbi->sb_lock);
3864         init_f2fs_rwsem(&sbi->pin_sem);
3865 }
3866
3867 static int init_percpu_info(struct f2fs_sb_info *sbi)
3868 {
3869         int err;
3870
3871         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3872         if (err)
3873                 return err;
3874
3875         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3876         if (err)
3877                 goto err_valid_block;
3878
3879         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3880                                                                 GFP_KERNEL);
3881         if (err)
3882                 goto err_node_block;
3883         return 0;
3884
3885 err_node_block:
3886         percpu_counter_destroy(&sbi->rf_node_block_count);
3887 err_valid_block:
3888         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3889         return err;
3890 }
3891
3892 #ifdef CONFIG_BLK_DEV_ZONED
3893
3894 struct f2fs_report_zones_args {
3895         struct f2fs_sb_info *sbi;
3896         struct f2fs_dev_info *dev;
3897 };
3898
3899 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3900                               void *data)
3901 {
3902         struct f2fs_report_zones_args *rz_args = data;
3903         block_t unusable_blocks = (zone->len - zone->capacity) >>
3904                                         F2FS_LOG_SECTORS_PER_BLOCK;
3905
3906         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3907                 return 0;
3908
3909         set_bit(idx, rz_args->dev->blkz_seq);
3910         if (!rz_args->sbi->unusable_blocks_per_sec) {
3911                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3912                 return 0;
3913         }
3914         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3915                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3916                 return -EINVAL;
3917         }
3918         return 0;
3919 }
3920
3921 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3922 {
3923         struct block_device *bdev = FDEV(devi).bdev;
3924         sector_t nr_sectors = bdev_nr_sectors(bdev);
3925         struct f2fs_report_zones_args rep_zone_arg;
3926         u64 zone_sectors;
3927         int ret;
3928
3929         if (!f2fs_sb_has_blkzoned(sbi))
3930                 return 0;
3931
3932         zone_sectors = bdev_zone_sectors(bdev);
3933         if (!is_power_of_2(zone_sectors)) {
3934                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3935                 return -EINVAL;
3936         }
3937
3938         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3939                                 SECTOR_TO_BLOCK(zone_sectors))
3940                 return -EINVAL;
3941         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3942         FDEV(devi).nr_blkz = div_u64(SECTOR_TO_BLOCK(nr_sectors),
3943                                         sbi->blocks_per_blkz);
3944         if (nr_sectors & (zone_sectors - 1))
3945                 FDEV(devi).nr_blkz++;
3946
3947         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3948                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3949                                         * sizeof(unsigned long),
3950                                         GFP_KERNEL);
3951         if (!FDEV(devi).blkz_seq)
3952                 return -ENOMEM;
3953
3954         rep_zone_arg.sbi = sbi;
3955         rep_zone_arg.dev = &FDEV(devi);
3956
3957         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3958                                   &rep_zone_arg);
3959         if (ret < 0)
3960                 return ret;
3961         return 0;
3962 }
3963 #endif
3964
3965 /*
3966  * Read f2fs raw super block.
3967  * Because we have two copies of super block, so read both of them
3968  * to get the first valid one. If any one of them is broken, we pass
3969  * them recovery flag back to the caller.
3970  */
3971 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3972                         struct f2fs_super_block **raw_super,
3973                         int *valid_super_block, int *recovery)
3974 {
3975         struct super_block *sb = sbi->sb;
3976         int block;
3977         struct buffer_head *bh;
3978         struct f2fs_super_block *super;
3979         int err = 0;
3980
3981         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3982         if (!super)
3983                 return -ENOMEM;
3984
3985         for (block = 0; block < 2; block++) {
3986                 bh = sb_bread(sb, block);
3987                 if (!bh) {
3988                         f2fs_err(sbi, "Unable to read %dth superblock",
3989                                  block + 1);
3990                         err = -EIO;
3991                         *recovery = 1;
3992                         continue;
3993                 }
3994
3995                 /* sanity checking of raw super */
3996                 err = sanity_check_raw_super(sbi, bh);
3997                 if (err) {
3998                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3999                                  block + 1);
4000                         brelse(bh);
4001                         *recovery = 1;
4002                         continue;
4003                 }
4004
4005                 if (!*raw_super) {
4006                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
4007                                                         sizeof(*super));
4008                         *valid_super_block = block;
4009                         *raw_super = super;
4010                 }
4011                 brelse(bh);
4012         }
4013
4014         /* No valid superblock */
4015         if (!*raw_super)
4016                 kfree(super);
4017         else
4018                 err = 0;
4019
4020         return err;
4021 }
4022
4023 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
4024 {
4025         struct buffer_head *bh;
4026         __u32 crc = 0;
4027         int err;
4028
4029         if ((recover && f2fs_readonly(sbi->sb)) ||
4030                                 f2fs_hw_is_readonly(sbi)) {
4031                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
4032                 return -EROFS;
4033         }
4034
4035         /* we should update superblock crc here */
4036         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
4037                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
4038                                 offsetof(struct f2fs_super_block, crc));
4039                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
4040         }
4041
4042         /* write back-up superblock first */
4043         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
4044         if (!bh)
4045                 return -EIO;
4046         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
4047         brelse(bh);
4048
4049         /* if we are in recovery path, skip writing valid superblock */
4050         if (recover || err)
4051                 return err;
4052
4053         /* write current valid superblock */
4054         bh = sb_bread(sbi->sb, sbi->valid_super_block);
4055         if (!bh)
4056                 return -EIO;
4057         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
4058         brelse(bh);
4059         return err;
4060 }
4061
4062 static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
4063 {
4064         unsigned long flags;
4065
4066         spin_lock_irqsave(&sbi->error_lock, flags);
4067         if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
4068                 sbi->stop_reason[reason]++;
4069         spin_unlock_irqrestore(&sbi->error_lock, flags);
4070 }
4071
4072 static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
4073 {
4074         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4075         unsigned long flags;
4076         int err;
4077
4078         f2fs_down_write(&sbi->sb_lock);
4079
4080         spin_lock_irqsave(&sbi->error_lock, flags);
4081         if (sbi->error_dirty) {
4082                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4083                                                         MAX_F2FS_ERRORS);
4084                 sbi->error_dirty = false;
4085         }
4086         memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
4087         spin_unlock_irqrestore(&sbi->error_lock, flags);
4088
4089         err = f2fs_commit_super(sbi, false);
4090
4091         f2fs_up_write(&sbi->sb_lock);
4092         if (err)
4093                 f2fs_err(sbi, "f2fs_commit_super fails to record err:%d", err);
4094 }
4095
4096 void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
4097 {
4098         unsigned long flags;
4099
4100         spin_lock_irqsave(&sbi->error_lock, flags);
4101         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
4102                 set_bit(flag, (unsigned long *)sbi->errors);
4103                 sbi->error_dirty = true;
4104         }
4105         spin_unlock_irqrestore(&sbi->error_lock, flags);
4106 }
4107
4108 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
4109 {
4110         unsigned long flags;
4111         bool need_update = false;
4112
4113         spin_lock_irqsave(&sbi->error_lock, flags);
4114         if (sbi->error_dirty) {
4115                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4116                                                         MAX_F2FS_ERRORS);
4117                 sbi->error_dirty = false;
4118                 need_update = true;
4119         }
4120         spin_unlock_irqrestore(&sbi->error_lock, flags);
4121
4122         return need_update;
4123 }
4124
4125 static void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error)
4126 {
4127         int err;
4128
4129         f2fs_down_write(&sbi->sb_lock);
4130
4131         if (!f2fs_update_errors(sbi))
4132                 goto out_unlock;
4133
4134         err = f2fs_commit_super(sbi, false);
4135         if (err)
4136                 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d",
4137                                                                 error, err);
4138 out_unlock:
4139         f2fs_up_write(&sbi->sb_lock);
4140 }
4141
4142 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
4143 {
4144         f2fs_save_errors(sbi, error);
4145         f2fs_record_errors(sbi, error);
4146 }
4147
4148 void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error)
4149 {
4150         f2fs_save_errors(sbi, error);
4151
4152         if (!sbi->error_dirty)
4153                 return;
4154         if (!test_bit(error, (unsigned long *)sbi->errors))
4155                 return;
4156         schedule_work(&sbi->s_error_work);
4157 }
4158
4159 static bool system_going_down(void)
4160 {
4161         return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
4162                 || system_state == SYSTEM_RESTART;
4163 }
4164
4165 void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
4166                                                         bool irq_context)
4167 {
4168         struct super_block *sb = sbi->sb;
4169         bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
4170         bool continue_fs = !shutdown &&
4171                         F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
4172
4173         set_ckpt_flags(sbi, CP_ERROR_FLAG);
4174
4175         if (!f2fs_hw_is_readonly(sbi)) {
4176                 save_stop_reason(sbi, reason);
4177
4178                 if (irq_context && !shutdown)
4179                         schedule_work(&sbi->s_error_work);
4180                 else
4181                         f2fs_record_stop_reason(sbi);
4182         }
4183
4184         /*
4185          * We force ERRORS_RO behavior when system is rebooting. Otherwise we
4186          * could panic during 'reboot -f' as the underlying device got already
4187          * disabled.
4188          */
4189         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
4190                                 !shutdown && !system_going_down() &&
4191                                 !is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN))
4192                 panic("F2FS-fs (device %s): panic forced after error\n",
4193                                                         sb->s_id);
4194
4195         if (shutdown)
4196                 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
4197
4198         /* continue filesystem operators if errors=continue */
4199         if (continue_fs || f2fs_readonly(sb))
4200                 return;
4201
4202         f2fs_warn(sbi, "Remounting filesystem read-only");
4203         /*
4204          * Make sure updated value of ->s_mount_flags will be visible before
4205          * ->s_flags update
4206          */
4207         smp_wmb();
4208         sb->s_flags |= SB_RDONLY;
4209 }
4210
4211 static void f2fs_record_error_work(struct work_struct *work)
4212 {
4213         struct f2fs_sb_info *sbi = container_of(work,
4214                                         struct f2fs_sb_info, s_error_work);
4215
4216         f2fs_record_stop_reason(sbi);
4217 }
4218
4219 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
4220 {
4221         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4222         unsigned int max_devices = MAX_DEVICES;
4223         unsigned int logical_blksize;
4224         blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
4225         int i;
4226
4227         /* Initialize single device information */
4228         if (!RDEV(0).path[0]) {
4229                 if (!bdev_is_zoned(sbi->sb->s_bdev))
4230                         return 0;
4231                 max_devices = 1;
4232         }
4233
4234         /*
4235          * Initialize multiple devices information, or single
4236          * zoned block device information.
4237          */
4238         sbi->devs = f2fs_kzalloc(sbi,
4239                                  array_size(max_devices,
4240                                             sizeof(struct f2fs_dev_info)),
4241                                  GFP_KERNEL);
4242         if (!sbi->devs)
4243                 return -ENOMEM;
4244
4245         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
4246         sbi->aligned_blksize = true;
4247
4248         for (i = 0; i < max_devices; i++) {
4249                 if (i == 0)
4250                         FDEV(0).bdev_file = sbi->sb->s_bdev_file;
4251                 else if (!RDEV(i).path[0])
4252                         break;
4253
4254                 if (max_devices > 1) {
4255                         /* Multi-device mount */
4256                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
4257                         FDEV(i).total_segments =
4258                                 le32_to_cpu(RDEV(i).total_segments);
4259                         if (i == 0) {
4260                                 FDEV(i).start_blk = 0;
4261                                 FDEV(i).end_blk = FDEV(i).start_blk +
4262                                     (FDEV(i).total_segments <<
4263                                     sbi->log_blocks_per_seg) - 1 +
4264                                     le32_to_cpu(raw_super->segment0_blkaddr);
4265                         } else {
4266                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
4267                                 FDEV(i).end_blk = FDEV(i).start_blk +
4268                                         (FDEV(i).total_segments <<
4269                                         sbi->log_blocks_per_seg) - 1;
4270                                 FDEV(i).bdev_file = bdev_file_open_by_path(
4271                                         FDEV(i).path, mode, sbi->sb, NULL);
4272                         }
4273                 }
4274                 if (IS_ERR(FDEV(i).bdev_file))
4275                         return PTR_ERR(FDEV(i).bdev_file);
4276
4277                 FDEV(i).bdev = file_bdev(FDEV(i).bdev_file);
4278                 /* to release errored devices */
4279                 sbi->s_ndevs = i + 1;
4280
4281                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4282                         sbi->aligned_blksize = false;
4283
4284 #ifdef CONFIG_BLK_DEV_ZONED
4285                 if (bdev_is_zoned(FDEV(i).bdev)) {
4286                         if (!f2fs_sb_has_blkzoned(sbi)) {
4287                                 f2fs_err(sbi, "Zoned block device feature not enabled");
4288                                 return -EINVAL;
4289                         }
4290                         if (init_blkz_info(sbi, i)) {
4291                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
4292                                 return -EINVAL;
4293                         }
4294                         if (max_devices == 1)
4295                                 break;
4296                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: Host-managed)",
4297                                   i, FDEV(i).path,
4298                                   FDEV(i).total_segments,
4299                                   FDEV(i).start_blk, FDEV(i).end_blk);
4300                         continue;
4301                 }
4302 #endif
4303                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4304                           i, FDEV(i).path,
4305                           FDEV(i).total_segments,
4306                           FDEV(i).start_blk, FDEV(i).end_blk);
4307         }
4308         f2fs_info(sbi,
4309                   "IO Block Size: %8ld KB", F2FS_IO_SIZE_KB(sbi));
4310         return 0;
4311 }
4312
4313 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4314 {
4315 #if IS_ENABLED(CONFIG_UNICODE)
4316         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4317                 const struct f2fs_sb_encodings *encoding_info;
4318                 struct unicode_map *encoding;
4319                 __u16 encoding_flags;
4320
4321                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4322                 if (!encoding_info) {
4323                         f2fs_err(sbi,
4324                                  "Encoding requested by superblock is unknown");
4325                         return -EINVAL;
4326                 }
4327
4328                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4329                 encoding = utf8_load(encoding_info->version);
4330                 if (IS_ERR(encoding)) {
4331                         f2fs_err(sbi,
4332                                  "can't mount with superblock charset: %s-%u.%u.%u "
4333                                  "not supported by the kernel. flags: 0x%x.",
4334                                  encoding_info->name,
4335                                  unicode_major(encoding_info->version),
4336                                  unicode_minor(encoding_info->version),
4337                                  unicode_rev(encoding_info->version),
4338                                  encoding_flags);
4339                         return PTR_ERR(encoding);
4340                 }
4341                 f2fs_info(sbi, "Using encoding defined by superblock: "
4342                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4343                          unicode_major(encoding_info->version),
4344                          unicode_minor(encoding_info->version),
4345                          unicode_rev(encoding_info->version),
4346                          encoding_flags);
4347
4348                 sbi->sb->s_encoding = encoding;
4349                 sbi->sb->s_encoding_flags = encoding_flags;
4350         }
4351 #else
4352         if (f2fs_sb_has_casefold(sbi)) {
4353                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4354                 return -EINVAL;
4355         }
4356 #endif
4357         return 0;
4358 }
4359
4360 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4361 {
4362         /* adjust parameters according to the volume size */
4363         if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4364                 if (f2fs_block_unit_discard(sbi))
4365                         SM_I(sbi)->dcc_info->discard_granularity =
4366                                                 MIN_DISCARD_GRANULARITY;
4367                 if (!f2fs_lfs_mode(sbi))
4368                         SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4369                                                 BIT(F2FS_IPU_HONOR_OPU_WRITE);
4370         }
4371
4372         sbi->readdir_ra = true;
4373 }
4374
4375 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4376 {
4377         struct f2fs_sb_info *sbi;
4378         struct f2fs_super_block *raw_super;
4379         struct inode *root;
4380         int err;
4381         bool skip_recovery = false, need_fsck = false;
4382         char *options = NULL;
4383         int recovery, i, valid_super_block;
4384         struct curseg_info *seg_i;
4385         int retry_cnt = 1;
4386 #ifdef CONFIG_QUOTA
4387         bool quota_enabled = false;
4388 #endif
4389
4390 try_onemore:
4391         err = -EINVAL;
4392         raw_super = NULL;
4393         valid_super_block = -1;
4394         recovery = 0;
4395
4396         /* allocate memory for f2fs-specific super block info */
4397         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4398         if (!sbi)
4399                 return -ENOMEM;
4400
4401         sbi->sb = sb;
4402
4403         /* initialize locks within allocated memory */
4404         init_f2fs_rwsem(&sbi->gc_lock);
4405         mutex_init(&sbi->writepages);
4406         init_f2fs_rwsem(&sbi->cp_global_sem);
4407         init_f2fs_rwsem(&sbi->node_write);
4408         init_f2fs_rwsem(&sbi->node_change);
4409         spin_lock_init(&sbi->stat_lock);
4410         init_f2fs_rwsem(&sbi->cp_rwsem);
4411         init_f2fs_rwsem(&sbi->quota_sem);
4412         init_waitqueue_head(&sbi->cp_wait);
4413         spin_lock_init(&sbi->error_lock);
4414
4415         for (i = 0; i < NR_INODE_TYPE; i++) {
4416                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4417                 spin_lock_init(&sbi->inode_lock[i]);
4418         }
4419         mutex_init(&sbi->flush_lock);
4420
4421         /* Load the checksum driver */
4422         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4423         if (IS_ERR(sbi->s_chksum_driver)) {
4424                 f2fs_err(sbi, "Cannot load crc32 driver.");
4425                 err = PTR_ERR(sbi->s_chksum_driver);
4426                 sbi->s_chksum_driver = NULL;
4427                 goto free_sbi;
4428         }
4429
4430         /* set a block size */
4431         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4432                 f2fs_err(sbi, "unable to set blocksize");
4433                 goto free_sbi;
4434         }
4435
4436         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4437                                                                 &recovery);
4438         if (err)
4439                 goto free_sbi;
4440
4441         sb->s_fs_info = sbi;
4442         sbi->raw_super = raw_super;
4443
4444         INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
4445         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4446         memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
4447
4448         /* precompute checksum seed for metadata */
4449         if (f2fs_sb_has_inode_chksum(sbi))
4450                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4451                                                 sizeof(raw_super->uuid));
4452
4453         default_options(sbi, false);
4454         /* parse mount options */
4455         options = kstrdup((const char *)data, GFP_KERNEL);
4456         if (data && !options) {
4457                 err = -ENOMEM;
4458                 goto free_sb_buf;
4459         }
4460
4461         err = parse_options(sb, options, false);
4462         if (err)
4463                 goto free_options;
4464
4465         sb->s_maxbytes = max_file_blocks(NULL) <<
4466                                 le32_to_cpu(raw_super->log_blocksize);
4467         sb->s_max_links = F2FS_LINK_MAX;
4468
4469         err = f2fs_setup_casefold(sbi);
4470         if (err)
4471                 goto free_options;
4472
4473 #ifdef CONFIG_QUOTA
4474         sb->dq_op = &f2fs_quota_operations;
4475         sb->s_qcop = &f2fs_quotactl_ops;
4476         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4477
4478         if (f2fs_sb_has_quota_ino(sbi)) {
4479                 for (i = 0; i < MAXQUOTAS; i++) {
4480                         if (f2fs_qf_ino(sbi->sb, i))
4481                                 sbi->nquota_files++;
4482                 }
4483         }
4484 #endif
4485
4486         sb->s_op = &f2fs_sops;
4487 #ifdef CONFIG_FS_ENCRYPTION
4488         sb->s_cop = &f2fs_cryptops;
4489 #endif
4490 #ifdef CONFIG_FS_VERITY
4491         sb->s_vop = &f2fs_verityops;
4492 #endif
4493         sb->s_xattr = f2fs_xattr_handlers;
4494         sb->s_export_op = &f2fs_export_ops;
4495         sb->s_magic = F2FS_SUPER_MAGIC;
4496         sb->s_time_gran = 1;
4497         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4498                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4499         super_set_uuid(sb, (void *) raw_super->uuid, sizeof(raw_super->uuid));
4500         sb->s_iflags |= SB_I_CGROUPWB;
4501
4502         /* init f2fs-specific super block info */
4503         sbi->valid_super_block = valid_super_block;
4504
4505         /* disallow all the data/node/meta page writes */
4506         set_sbi_flag(sbi, SBI_POR_DOING);
4507
4508         err = f2fs_init_write_merge_io(sbi);
4509         if (err)
4510                 goto free_bio_info;
4511
4512         init_sb_info(sbi);
4513
4514         err = f2fs_init_iostat(sbi);
4515         if (err)
4516                 goto free_bio_info;
4517
4518         err = init_percpu_info(sbi);
4519         if (err)
4520                 goto free_iostat;
4521
4522         if (F2FS_IO_ALIGNED(sbi)) {
4523                 sbi->write_io_dummy =
4524                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4525                 if (!sbi->write_io_dummy) {
4526                         err = -ENOMEM;
4527                         goto free_percpu;
4528                 }
4529         }
4530
4531         /* init per sbi slab cache */
4532         err = f2fs_init_xattr_caches(sbi);
4533         if (err)
4534                 goto free_io_dummy;
4535         err = f2fs_init_page_array_cache(sbi);
4536         if (err)
4537                 goto free_xattr_cache;
4538
4539         /* get an inode for meta space */
4540         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4541         if (IS_ERR(sbi->meta_inode)) {
4542                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4543                 err = PTR_ERR(sbi->meta_inode);
4544                 goto free_page_array_cache;
4545         }
4546
4547         err = f2fs_get_valid_checkpoint(sbi);
4548         if (err) {
4549                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4550                 goto free_meta_inode;
4551         }
4552
4553         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4554                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4555         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4556                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4557                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4558         }
4559
4560         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4561                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4562
4563         /* Initialize device list */
4564         err = f2fs_scan_devices(sbi);
4565         if (err) {
4566                 f2fs_err(sbi, "Failed to find devices");
4567                 goto free_devices;
4568         }
4569
4570         err = f2fs_init_post_read_wq(sbi);
4571         if (err) {
4572                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4573                 goto free_devices;
4574         }
4575
4576         sbi->total_valid_node_count =
4577                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4578         percpu_counter_set(&sbi->total_valid_inode_count,
4579                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4580         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4581         sbi->total_valid_block_count =
4582                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4583         sbi->last_valid_block_count = sbi->total_valid_block_count;
4584         sbi->reserved_blocks = 0;
4585         sbi->current_reserved_blocks = 0;
4586         limit_reserve_root(sbi);
4587         adjust_unusable_cap_perc(sbi);
4588
4589         f2fs_init_extent_cache_info(sbi);
4590
4591         f2fs_init_ino_entry_info(sbi);
4592
4593         f2fs_init_fsync_node_info(sbi);
4594
4595         /* setup checkpoint request control and start checkpoint issue thread */
4596         f2fs_init_ckpt_req_control(sbi);
4597         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4598                         test_opt(sbi, MERGE_CHECKPOINT)) {
4599                 err = f2fs_start_ckpt_thread(sbi);
4600                 if (err) {
4601                         f2fs_err(sbi,
4602                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4603                             err);
4604                         goto stop_ckpt_thread;
4605                 }
4606         }
4607
4608         /* setup f2fs internal modules */
4609         err = f2fs_build_segment_manager(sbi);
4610         if (err) {
4611                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4612                          err);
4613                 goto free_sm;
4614         }
4615         err = f2fs_build_node_manager(sbi);
4616         if (err) {
4617                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4618                          err);
4619                 goto free_nm;
4620         }
4621
4622         err = adjust_reserved_segment(sbi);
4623         if (err)
4624                 goto free_nm;
4625
4626         /* For write statistics */
4627         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4628
4629         /* Read accumulated write IO statistics if exists */
4630         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4631         if (__exist_node_summaries(sbi))
4632                 sbi->kbytes_written =
4633                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4634
4635         f2fs_build_gc_manager(sbi);
4636
4637         err = f2fs_build_stats(sbi);
4638         if (err)
4639                 goto free_nm;
4640
4641         /* get an inode for node space */
4642         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4643         if (IS_ERR(sbi->node_inode)) {
4644                 f2fs_err(sbi, "Failed to read node inode");
4645                 err = PTR_ERR(sbi->node_inode);
4646                 goto free_stats;
4647         }
4648
4649         /* read root inode and dentry */
4650         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4651         if (IS_ERR(root)) {
4652                 f2fs_err(sbi, "Failed to read root inode");
4653                 err = PTR_ERR(root);
4654                 goto free_node_inode;
4655         }
4656         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4657                         !root->i_size || !root->i_nlink) {
4658                 iput(root);
4659                 err = -EINVAL;
4660                 goto free_node_inode;
4661         }
4662
4663         generic_set_sb_d_ops(sb);
4664         sb->s_root = d_make_root(root); /* allocate root dentry */
4665         if (!sb->s_root) {
4666                 err = -ENOMEM;
4667                 goto free_node_inode;
4668         }
4669
4670         err = f2fs_init_compress_inode(sbi);
4671         if (err)
4672                 goto free_root_inode;
4673
4674         err = f2fs_register_sysfs(sbi);
4675         if (err)
4676                 goto free_compress_inode;
4677
4678 #ifdef CONFIG_QUOTA
4679         /* Enable quota usage during mount */
4680         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4681                 err = f2fs_enable_quotas(sb);
4682                 if (err)
4683                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4684         }
4685
4686         quota_enabled = f2fs_recover_quota_begin(sbi);
4687 #endif
4688         /* if there are any orphan inodes, free them */
4689         err = f2fs_recover_orphan_inodes(sbi);
4690         if (err)
4691                 goto free_meta;
4692
4693         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4694                 goto reset_checkpoint;
4695
4696         /* recover fsynced data */
4697         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4698                         !test_opt(sbi, NORECOVERY)) {
4699                 /*
4700                  * mount should be failed, when device has readonly mode, and
4701                  * previous checkpoint was not done by clean system shutdown.
4702                  */
4703                 if (f2fs_hw_is_readonly(sbi)) {
4704                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4705                                 err = f2fs_recover_fsync_data(sbi, true);
4706                                 if (err > 0) {
4707                                         err = -EROFS;
4708                                         f2fs_err(sbi, "Need to recover fsync data, but "
4709                                                 "write access unavailable, please try "
4710                                                 "mount w/ disable_roll_forward or norecovery");
4711                                 }
4712                                 if (err < 0)
4713                                         goto free_meta;
4714                         }
4715                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4716                         goto reset_checkpoint;
4717                 }
4718
4719                 if (need_fsck)
4720                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4721
4722                 if (skip_recovery)
4723                         goto reset_checkpoint;
4724
4725                 err = f2fs_recover_fsync_data(sbi, false);
4726                 if (err < 0) {
4727                         if (err != -ENOMEM)
4728                                 skip_recovery = true;
4729                         need_fsck = true;
4730                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4731                                  err);
4732                         goto free_meta;
4733                 }
4734         } else {
4735                 err = f2fs_recover_fsync_data(sbi, true);
4736
4737                 if (!f2fs_readonly(sb) && err > 0) {
4738                         err = -EINVAL;
4739                         f2fs_err(sbi, "Need to recover fsync data");
4740                         goto free_meta;
4741                 }
4742         }
4743
4744 #ifdef CONFIG_QUOTA
4745         f2fs_recover_quota_end(sbi, quota_enabled);
4746 #endif
4747 reset_checkpoint:
4748         /*
4749          * If the f2fs is not readonly and fsync data recovery succeeds,
4750          * check zoned block devices' write pointer consistency.
4751          */
4752         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4753                 err = f2fs_check_write_pointer(sbi);
4754                 if (err)
4755                         goto free_meta;
4756         }
4757
4758         f2fs_init_inmem_curseg(sbi);
4759
4760         /* f2fs_recover_fsync_data() cleared this already */
4761         clear_sbi_flag(sbi, SBI_POR_DOING);
4762
4763         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4764                 err = f2fs_disable_checkpoint(sbi);
4765                 if (err)
4766                         goto sync_free_meta;
4767         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4768                 f2fs_enable_checkpoint(sbi);
4769         }
4770
4771         /*
4772          * If filesystem is not mounted as read-only then
4773          * do start the gc_thread.
4774          */
4775         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4776                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4777                 /* After POR, we can run background GC thread.*/
4778                 err = f2fs_start_gc_thread(sbi);
4779                 if (err)
4780                         goto sync_free_meta;
4781         }
4782         kvfree(options);
4783
4784         /* recover broken superblock */
4785         if (recovery) {
4786                 err = f2fs_commit_super(sbi, true);
4787                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4788                           sbi->valid_super_block ? 1 : 2, err);
4789         }
4790
4791         f2fs_join_shrinker(sbi);
4792
4793         f2fs_tuning_parameters(sbi);
4794
4795         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4796                     cur_cp_version(F2FS_CKPT(sbi)));
4797         f2fs_update_time(sbi, CP_TIME);
4798         f2fs_update_time(sbi, REQ_TIME);
4799         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4800         return 0;
4801
4802 sync_free_meta:
4803         /* safe to flush all the data */
4804         sync_filesystem(sbi->sb);
4805         retry_cnt = 0;
4806
4807 free_meta:
4808 #ifdef CONFIG_QUOTA
4809         f2fs_truncate_quota_inode_pages(sb);
4810         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4811                 f2fs_quota_off_umount(sbi->sb);
4812 #endif
4813         /*
4814          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4815          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4816          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4817          * falls into an infinite loop in f2fs_sync_meta_pages().
4818          */
4819         truncate_inode_pages_final(META_MAPPING(sbi));
4820         /* evict some inodes being cached by GC */
4821         evict_inodes(sb);
4822         f2fs_unregister_sysfs(sbi);
4823 free_compress_inode:
4824         f2fs_destroy_compress_inode(sbi);
4825 free_root_inode:
4826         dput(sb->s_root);
4827         sb->s_root = NULL;
4828 free_node_inode:
4829         f2fs_release_ino_entry(sbi, true);
4830         truncate_inode_pages_final(NODE_MAPPING(sbi));
4831         iput(sbi->node_inode);
4832         sbi->node_inode = NULL;
4833 free_stats:
4834         f2fs_destroy_stats(sbi);
4835 free_nm:
4836         /* stop discard thread before destroying node manager */
4837         f2fs_stop_discard_thread(sbi);
4838         f2fs_destroy_node_manager(sbi);
4839 free_sm:
4840         f2fs_destroy_segment_manager(sbi);
4841 stop_ckpt_thread:
4842         f2fs_stop_ckpt_thread(sbi);
4843         /* flush s_error_work before sbi destroy */
4844         flush_work(&sbi->s_error_work);
4845         f2fs_destroy_post_read_wq(sbi);
4846 free_devices:
4847         destroy_device_list(sbi);
4848         kvfree(sbi->ckpt);
4849 free_meta_inode:
4850         make_bad_inode(sbi->meta_inode);
4851         iput(sbi->meta_inode);
4852         sbi->meta_inode = NULL;
4853 free_page_array_cache:
4854         f2fs_destroy_page_array_cache(sbi);
4855 free_xattr_cache:
4856         f2fs_destroy_xattr_caches(sbi);
4857 free_io_dummy:
4858         mempool_destroy(sbi->write_io_dummy);
4859 free_percpu:
4860         destroy_percpu_info(sbi);
4861 free_iostat:
4862         f2fs_destroy_iostat(sbi);
4863 free_bio_info:
4864         for (i = 0; i < NR_PAGE_TYPE; i++)
4865                 kvfree(sbi->write_io[i]);
4866
4867 #if IS_ENABLED(CONFIG_UNICODE)
4868         utf8_unload(sb->s_encoding);
4869         sb->s_encoding = NULL;
4870 #endif
4871 free_options:
4872 #ifdef CONFIG_QUOTA
4873         for (i = 0; i < MAXQUOTAS; i++)
4874                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4875 #endif
4876         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4877         kvfree(options);
4878 free_sb_buf:
4879         kfree(raw_super);
4880 free_sbi:
4881         if (sbi->s_chksum_driver)
4882                 crypto_free_shash(sbi->s_chksum_driver);
4883         kfree(sbi);
4884         sb->s_fs_info = NULL;
4885
4886         /* give only one another chance */
4887         if (retry_cnt > 0 && skip_recovery) {
4888                 retry_cnt--;
4889                 shrink_dcache_sb(sb);
4890                 goto try_onemore;
4891         }
4892         return err;
4893 }
4894
4895 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4896                         const char *dev_name, void *data)
4897 {
4898         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4899 }
4900
4901 static void kill_f2fs_super(struct super_block *sb)
4902 {
4903         struct f2fs_sb_info *sbi = F2FS_SB(sb);
4904
4905         if (sb->s_root) {
4906                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4907                 f2fs_stop_gc_thread(sbi);
4908                 f2fs_stop_discard_thread(sbi);
4909
4910 #ifdef CONFIG_F2FS_FS_COMPRESSION
4911                 /*
4912                  * latter evict_inode() can bypass checking and invalidating
4913                  * compress inode cache.
4914                  */
4915                 if (test_opt(sbi, COMPRESS_CACHE))
4916                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4917 #endif
4918
4919                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4920                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4921                         struct cp_control cpc = {
4922                                 .reason = CP_UMOUNT,
4923                         };
4924                         stat_inc_cp_call_count(sbi, TOTAL_CALL);
4925                         f2fs_write_checkpoint(sbi, &cpc);
4926                 }
4927
4928                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4929                         sb->s_flags &= ~SB_RDONLY;
4930         }
4931         kill_block_super(sb);
4932         /* Release block devices last, after fscrypt_destroy_keyring(). */
4933         if (sbi) {
4934                 destroy_device_list(sbi);
4935                 kfree(sbi);
4936                 sb->s_fs_info = NULL;
4937         }
4938 }
4939
4940 static struct file_system_type f2fs_fs_type = {
4941         .owner          = THIS_MODULE,
4942         .name           = "f2fs",
4943         .mount          = f2fs_mount,
4944         .kill_sb        = kill_f2fs_super,
4945         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4946 };
4947 MODULE_ALIAS_FS("f2fs");
4948
4949 static int __init init_inodecache(void)
4950 {
4951         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4952                         sizeof(struct f2fs_inode_info), 0,
4953                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4954         return f2fs_inode_cachep ? 0 : -ENOMEM;
4955 }
4956
4957 static void destroy_inodecache(void)
4958 {
4959         /*
4960          * Make sure all delayed rcu free inodes are flushed before we
4961          * destroy cache.
4962          */
4963         rcu_barrier();
4964         kmem_cache_destroy(f2fs_inode_cachep);
4965 }
4966
4967 static int __init init_f2fs_fs(void)
4968 {
4969         int err;
4970
4971         if (PAGE_SIZE != F2FS_BLKSIZE) {
4972                 printk("F2FS not supported on PAGE_SIZE(%lu) != BLOCK_SIZE(%lu)\n",
4973                                 PAGE_SIZE, F2FS_BLKSIZE);
4974                 return -EINVAL;
4975         }
4976
4977         err = init_inodecache();
4978         if (err)
4979                 goto fail;
4980         err = f2fs_create_node_manager_caches();
4981         if (err)
4982                 goto free_inodecache;
4983         err = f2fs_create_segment_manager_caches();
4984         if (err)
4985                 goto free_node_manager_caches;
4986         err = f2fs_create_checkpoint_caches();
4987         if (err)
4988                 goto free_segment_manager_caches;
4989         err = f2fs_create_recovery_cache();
4990         if (err)
4991                 goto free_checkpoint_caches;
4992         err = f2fs_create_extent_cache();
4993         if (err)
4994                 goto free_recovery_cache;
4995         err = f2fs_create_garbage_collection_cache();
4996         if (err)
4997                 goto free_extent_cache;
4998         err = f2fs_init_sysfs();
4999         if (err)
5000                 goto free_garbage_collection_cache;
5001         err = f2fs_init_shrinker();
5002         if (err)
5003                 goto free_sysfs;
5004         err = register_filesystem(&f2fs_fs_type);
5005         if (err)
5006                 goto free_shrinker;
5007         f2fs_create_root_stats();
5008         err = f2fs_init_post_read_processing();
5009         if (err)
5010                 goto free_root_stats;
5011         err = f2fs_init_iostat_processing();
5012         if (err)
5013                 goto free_post_read;
5014         err = f2fs_init_bio_entry_cache();
5015         if (err)
5016                 goto free_iostat;
5017         err = f2fs_init_bioset();
5018         if (err)
5019                 goto free_bio_entry_cache;
5020         err = f2fs_init_compress_mempool();
5021         if (err)
5022                 goto free_bioset;
5023         err = f2fs_init_compress_cache();
5024         if (err)
5025                 goto free_compress_mempool;
5026         err = f2fs_create_casefold_cache();
5027         if (err)
5028                 goto free_compress_cache;
5029         return 0;
5030 free_compress_cache:
5031         f2fs_destroy_compress_cache();
5032 free_compress_mempool:
5033         f2fs_destroy_compress_mempool();
5034 free_bioset:
5035         f2fs_destroy_bioset();
5036 free_bio_entry_cache:
5037         f2fs_destroy_bio_entry_cache();
5038 free_iostat:
5039         f2fs_destroy_iostat_processing();
5040 free_post_read:
5041         f2fs_destroy_post_read_processing();
5042 free_root_stats:
5043         f2fs_destroy_root_stats();
5044         unregister_filesystem(&f2fs_fs_type);
5045 free_shrinker:
5046         f2fs_exit_shrinker();
5047 free_sysfs:
5048         f2fs_exit_sysfs();
5049 free_garbage_collection_cache:
5050         f2fs_destroy_garbage_collection_cache();
5051 free_extent_cache:
5052         f2fs_destroy_extent_cache();
5053 free_recovery_cache:
5054         f2fs_destroy_recovery_cache();
5055 free_checkpoint_caches:
5056         f2fs_destroy_checkpoint_caches();
5057 free_segment_manager_caches:
5058         f2fs_destroy_segment_manager_caches();
5059 free_node_manager_caches:
5060         f2fs_destroy_node_manager_caches();
5061 free_inodecache:
5062         destroy_inodecache();
5063 fail:
5064         return err;
5065 }
5066
5067 static void __exit exit_f2fs_fs(void)
5068 {
5069         f2fs_destroy_casefold_cache();
5070         f2fs_destroy_compress_cache();
5071         f2fs_destroy_compress_mempool();
5072         f2fs_destroy_bioset();
5073         f2fs_destroy_bio_entry_cache();
5074         f2fs_destroy_iostat_processing();
5075         f2fs_destroy_post_read_processing();
5076         f2fs_destroy_root_stats();
5077         unregister_filesystem(&f2fs_fs_type);
5078         f2fs_exit_shrinker();
5079         f2fs_exit_sysfs();
5080         f2fs_destroy_garbage_collection_cache();
5081         f2fs_destroy_extent_cache();
5082         f2fs_destroy_recovery_cache();
5083         f2fs_destroy_checkpoint_caches();
5084         f2fs_destroy_segment_manager_caches();
5085         f2fs_destroy_node_manager_caches();
5086         destroy_inodecache();
5087 }
5088
5089 module_init(init_f2fs_fs)
5090 module_exit(exit_f2fs_fs)
5091
5092 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
5093 MODULE_DESCRIPTION("Flash Friendly File System");
5094 MODULE_LICENSE("GPL");
5095 MODULE_SOFTDEP("pre: crc32");
5096