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, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1426                 f2fs_err(sbi, "LFS is not compatible with checkpoint=disable");
1427                 return -EINVAL;
1428         }
1429
1430         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1431                 f2fs_err(sbi, "LFS is not compatible with ATGC");
1432                 return -EINVAL;
1433         }
1434
1435         if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1436                 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1437                 return -EINVAL;
1438         }
1439
1440         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1441                 f2fs_err(sbi, "Allow to mount readonly mode only");
1442                 return -EROFS;
1443         }
1444         return 0;
1445 }
1446
1447 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1448 {
1449         struct f2fs_inode_info *fi;
1450
1451         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC))
1452                 return NULL;
1453
1454         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1455         if (!fi)
1456                 return NULL;
1457
1458         init_once((void *) fi);
1459
1460         /* Initialize f2fs-specific inode info */
1461         atomic_set(&fi->dirty_pages, 0);
1462         atomic_set(&fi->i_compr_blocks, 0);
1463         init_f2fs_rwsem(&fi->i_sem);
1464         spin_lock_init(&fi->i_size_lock);
1465         INIT_LIST_HEAD(&fi->dirty_list);
1466         INIT_LIST_HEAD(&fi->gdirty_list);
1467         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1468         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1469         init_f2fs_rwsem(&fi->i_xattr_sem);
1470
1471         /* Will be used by directory only */
1472         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1473
1474         return &fi->vfs_inode;
1475 }
1476
1477 static int f2fs_drop_inode(struct inode *inode)
1478 {
1479         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1480         int ret;
1481
1482         /*
1483          * during filesystem shutdown, if checkpoint is disabled,
1484          * drop useless meta/node dirty pages.
1485          */
1486         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1487                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1488                         inode->i_ino == F2FS_META_INO(sbi)) {
1489                         trace_f2fs_drop_inode(inode, 1);
1490                         return 1;
1491                 }
1492         }
1493
1494         /*
1495          * This is to avoid a deadlock condition like below.
1496          * writeback_single_inode(inode)
1497          *  - f2fs_write_data_page
1498          *    - f2fs_gc -> iput -> evict
1499          *       - inode_wait_for_writeback(inode)
1500          */
1501         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1502                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1503                         /* to avoid evict_inode call simultaneously */
1504                         atomic_inc(&inode->i_count);
1505                         spin_unlock(&inode->i_lock);
1506
1507                         /* should remain fi->extent_tree for writepage */
1508                         f2fs_destroy_extent_node(inode);
1509
1510                         sb_start_intwrite(inode->i_sb);
1511                         f2fs_i_size_write(inode, 0);
1512
1513                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1514                                         inode, NULL, 0, DATA);
1515                         truncate_inode_pages_final(inode->i_mapping);
1516
1517                         if (F2FS_HAS_BLOCKS(inode))
1518                                 f2fs_truncate(inode);
1519
1520                         sb_end_intwrite(inode->i_sb);
1521
1522                         spin_lock(&inode->i_lock);
1523                         atomic_dec(&inode->i_count);
1524                 }
1525                 trace_f2fs_drop_inode(inode, 0);
1526                 return 0;
1527         }
1528         ret = generic_drop_inode(inode);
1529         if (!ret)
1530                 ret = fscrypt_drop_inode(inode);
1531         trace_f2fs_drop_inode(inode, ret);
1532         return ret;
1533 }
1534
1535 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1536 {
1537         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1538         int ret = 0;
1539
1540         spin_lock(&sbi->inode_lock[DIRTY_META]);
1541         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1542                 ret = 1;
1543         } else {
1544                 set_inode_flag(inode, FI_DIRTY_INODE);
1545                 stat_inc_dirty_inode(sbi, DIRTY_META);
1546         }
1547         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1548                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1549                                 &sbi->inode_list[DIRTY_META]);
1550                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1551         }
1552         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1553         return ret;
1554 }
1555
1556 void f2fs_inode_synced(struct inode *inode)
1557 {
1558         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1559
1560         spin_lock(&sbi->inode_lock[DIRTY_META]);
1561         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1562                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1563                 return;
1564         }
1565         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1566                 list_del_init(&F2FS_I(inode)->gdirty_list);
1567                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1568         }
1569         clear_inode_flag(inode, FI_DIRTY_INODE);
1570         clear_inode_flag(inode, FI_AUTO_RECOVER);
1571         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1572         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1573 }
1574
1575 /*
1576  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1577  *
1578  * We should call set_dirty_inode to write the dirty inode through write_inode.
1579  */
1580 static void f2fs_dirty_inode(struct inode *inode, int flags)
1581 {
1582         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1583
1584         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1585                         inode->i_ino == F2FS_META_INO(sbi))
1586                 return;
1587
1588         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1589                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1590
1591         f2fs_inode_dirtied(inode, false);
1592 }
1593
1594 static void f2fs_free_inode(struct inode *inode)
1595 {
1596         fscrypt_free_inode(inode);
1597         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1598 }
1599
1600 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1601 {
1602         percpu_counter_destroy(&sbi->total_valid_inode_count);
1603         percpu_counter_destroy(&sbi->rf_node_block_count);
1604         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1605 }
1606
1607 static void destroy_device_list(struct f2fs_sb_info *sbi)
1608 {
1609         int i;
1610
1611         for (i = 0; i < sbi->s_ndevs; i++) {
1612                 if (i > 0)
1613                         bdev_release(FDEV(i).bdev_handle);
1614 #ifdef CONFIG_BLK_DEV_ZONED
1615                 kvfree(FDEV(i).blkz_seq);
1616 #endif
1617         }
1618         kvfree(sbi->devs);
1619 }
1620
1621 static void f2fs_put_super(struct super_block *sb)
1622 {
1623         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1624         int i;
1625         int err = 0;
1626         bool done;
1627
1628         /* unregister procfs/sysfs entries in advance to avoid race case */
1629         f2fs_unregister_sysfs(sbi);
1630
1631         f2fs_quota_off_umount(sb);
1632
1633         /* prevent remaining shrinker jobs */
1634         mutex_lock(&sbi->umount_mutex);
1635
1636         /*
1637          * flush all issued checkpoints and stop checkpoint issue thread.
1638          * after then, all checkpoints should be done by each process context.
1639          */
1640         f2fs_stop_ckpt_thread(sbi);
1641
1642         /*
1643          * We don't need to do checkpoint when superblock is clean.
1644          * But, the previous checkpoint was not done by umount, it needs to do
1645          * clean checkpoint again.
1646          */
1647         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1648                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1649                 struct cp_control cpc = {
1650                         .reason = CP_UMOUNT,
1651                 };
1652                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1653                 err = f2fs_write_checkpoint(sbi, &cpc);
1654         }
1655
1656         /* be sure to wait for any on-going discard commands */
1657         done = f2fs_issue_discard_timeout(sbi);
1658         if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && done) {
1659                 struct cp_control cpc = {
1660                         .reason = CP_UMOUNT | CP_TRIMMED,
1661                 };
1662                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1663                 err = f2fs_write_checkpoint(sbi, &cpc);
1664         }
1665
1666         /*
1667          * normally superblock is clean, so we need to release this.
1668          * In addition, EIO will skip do checkpoint, we need this as well.
1669          */
1670         f2fs_release_ino_entry(sbi, true);
1671
1672         f2fs_leave_shrinker(sbi);
1673         mutex_unlock(&sbi->umount_mutex);
1674
1675         /* our cp_error case, we can wait for any writeback page */
1676         f2fs_flush_merged_writes(sbi);
1677
1678         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1679
1680         if (err || f2fs_cp_error(sbi)) {
1681                 truncate_inode_pages_final(NODE_MAPPING(sbi));
1682                 truncate_inode_pages_final(META_MAPPING(sbi));
1683         }
1684
1685         for (i = 0; i < NR_COUNT_TYPE; i++) {
1686                 if (!get_pages(sbi, i))
1687                         continue;
1688                 f2fs_err(sbi, "detect filesystem reference count leak during "
1689                         "umount, type: %d, count: %lld", i, get_pages(sbi, i));
1690                 f2fs_bug_on(sbi, 1);
1691         }
1692
1693         f2fs_bug_on(sbi, sbi->fsync_node_num);
1694
1695         f2fs_destroy_compress_inode(sbi);
1696
1697         iput(sbi->node_inode);
1698         sbi->node_inode = NULL;
1699
1700         iput(sbi->meta_inode);
1701         sbi->meta_inode = NULL;
1702
1703         /*
1704          * iput() can update stat information, if f2fs_write_checkpoint()
1705          * above failed with error.
1706          */
1707         f2fs_destroy_stats(sbi);
1708
1709         /* destroy f2fs internal modules */
1710         f2fs_destroy_node_manager(sbi);
1711         f2fs_destroy_segment_manager(sbi);
1712
1713         /* flush s_error_work before sbi destroy */
1714         flush_work(&sbi->s_error_work);
1715
1716         f2fs_destroy_post_read_wq(sbi);
1717
1718         kvfree(sbi->ckpt);
1719
1720         sb->s_fs_info = NULL;
1721         if (sbi->s_chksum_driver)
1722                 crypto_free_shash(sbi->s_chksum_driver);
1723         kfree(sbi->raw_super);
1724
1725         destroy_device_list(sbi);
1726         f2fs_destroy_page_array_cache(sbi);
1727         f2fs_destroy_xattr_caches(sbi);
1728         mempool_destroy(sbi->write_io_dummy);
1729 #ifdef CONFIG_QUOTA
1730         for (i = 0; i < MAXQUOTAS; i++)
1731                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1732 #endif
1733         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1734         destroy_percpu_info(sbi);
1735         f2fs_destroy_iostat(sbi);
1736         for (i = 0; i < NR_PAGE_TYPE; i++)
1737                 kvfree(sbi->write_io[i]);
1738 #if IS_ENABLED(CONFIG_UNICODE)
1739         utf8_unload(sb->s_encoding);
1740 #endif
1741         kfree(sbi);
1742 }
1743
1744 int f2fs_sync_fs(struct super_block *sb, int sync)
1745 {
1746         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1747         int err = 0;
1748
1749         if (unlikely(f2fs_cp_error(sbi)))
1750                 return 0;
1751         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1752                 return 0;
1753
1754         trace_f2fs_sync_fs(sb, sync);
1755
1756         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1757                 return -EAGAIN;
1758
1759         if (sync) {
1760                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1761                 err = f2fs_issue_checkpoint(sbi);
1762         }
1763
1764         return err;
1765 }
1766
1767 static int f2fs_freeze(struct super_block *sb)
1768 {
1769         if (f2fs_readonly(sb))
1770                 return 0;
1771
1772         /* IO error happened before */
1773         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1774                 return -EIO;
1775
1776         /* must be clean, since sync_filesystem() was already called */
1777         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1778                 return -EINVAL;
1779
1780         /* Let's flush checkpoints and stop the thread. */
1781         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1782
1783         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1784         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1785         return 0;
1786 }
1787
1788 static int f2fs_unfreeze(struct super_block *sb)
1789 {
1790         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1791         return 0;
1792 }
1793
1794 #ifdef CONFIG_QUOTA
1795 static int f2fs_statfs_project(struct super_block *sb,
1796                                 kprojid_t projid, struct kstatfs *buf)
1797 {
1798         struct kqid qid;
1799         struct dquot *dquot;
1800         u64 limit;
1801         u64 curblock;
1802
1803         qid = make_kqid_projid(projid);
1804         dquot = dqget(sb, qid);
1805         if (IS_ERR(dquot))
1806                 return PTR_ERR(dquot);
1807         spin_lock(&dquot->dq_dqb_lock);
1808
1809         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1810                                         dquot->dq_dqb.dqb_bhardlimit);
1811         if (limit)
1812                 limit >>= sb->s_blocksize_bits;
1813
1814         if (limit && buf->f_blocks > limit) {
1815                 curblock = (dquot->dq_dqb.dqb_curspace +
1816                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1817                 buf->f_blocks = limit;
1818                 buf->f_bfree = buf->f_bavail =
1819                         (buf->f_blocks > curblock) ?
1820                          (buf->f_blocks - curblock) : 0;
1821         }
1822
1823         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1824                                         dquot->dq_dqb.dqb_ihardlimit);
1825
1826         if (limit && buf->f_files > limit) {
1827                 buf->f_files = limit;
1828                 buf->f_ffree =
1829                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1830                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1831         }
1832
1833         spin_unlock(&dquot->dq_dqb_lock);
1834         dqput(dquot);
1835         return 0;
1836 }
1837 #endif
1838
1839 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1840 {
1841         struct super_block *sb = dentry->d_sb;
1842         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1843         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1844         block_t total_count, user_block_count, start_count;
1845         u64 avail_node_count;
1846         unsigned int total_valid_node_count;
1847
1848         total_count = le64_to_cpu(sbi->raw_super->block_count);
1849         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1850         buf->f_type = F2FS_SUPER_MAGIC;
1851         buf->f_bsize = sbi->blocksize;
1852
1853         buf->f_blocks = total_count - start_count;
1854
1855         spin_lock(&sbi->stat_lock);
1856
1857         user_block_count = sbi->user_block_count;
1858         total_valid_node_count = valid_node_count(sbi);
1859         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1860         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1861                                                 sbi->current_reserved_blocks;
1862
1863         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1864                 buf->f_bfree = 0;
1865         else
1866                 buf->f_bfree -= sbi->unusable_block_count;
1867         spin_unlock(&sbi->stat_lock);
1868
1869         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1870                 buf->f_bavail = buf->f_bfree -
1871                                 F2FS_OPTION(sbi).root_reserved_blocks;
1872         else
1873                 buf->f_bavail = 0;
1874
1875         if (avail_node_count > user_block_count) {
1876                 buf->f_files = user_block_count;
1877                 buf->f_ffree = buf->f_bavail;
1878         } else {
1879                 buf->f_files = avail_node_count;
1880                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1881                                         buf->f_bavail);
1882         }
1883
1884         buf->f_namelen = F2FS_NAME_LEN;
1885         buf->f_fsid    = u64_to_fsid(id);
1886
1887 #ifdef CONFIG_QUOTA
1888         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1889                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1890                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1891         }
1892 #endif
1893         return 0;
1894 }
1895
1896 static inline void f2fs_show_quota_options(struct seq_file *seq,
1897                                            struct super_block *sb)
1898 {
1899 #ifdef CONFIG_QUOTA
1900         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1901
1902         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1903                 char *fmtname = "";
1904
1905                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1906                 case QFMT_VFS_OLD:
1907                         fmtname = "vfsold";
1908                         break;
1909                 case QFMT_VFS_V0:
1910                         fmtname = "vfsv0";
1911                         break;
1912                 case QFMT_VFS_V1:
1913                         fmtname = "vfsv1";
1914                         break;
1915                 }
1916                 seq_printf(seq, ",jqfmt=%s", fmtname);
1917         }
1918
1919         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1920                 seq_show_option(seq, "usrjquota",
1921                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1922
1923         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1924                 seq_show_option(seq, "grpjquota",
1925                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1926
1927         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1928                 seq_show_option(seq, "prjjquota",
1929                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1930 #endif
1931 }
1932
1933 #ifdef CONFIG_F2FS_FS_COMPRESSION
1934 static inline void f2fs_show_compress_options(struct seq_file *seq,
1935                                                         struct super_block *sb)
1936 {
1937         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1938         char *algtype = "";
1939         int i;
1940
1941         if (!f2fs_sb_has_compression(sbi))
1942                 return;
1943
1944         switch (F2FS_OPTION(sbi).compress_algorithm) {
1945         case COMPRESS_LZO:
1946                 algtype = "lzo";
1947                 break;
1948         case COMPRESS_LZ4:
1949                 algtype = "lz4";
1950                 break;
1951         case COMPRESS_ZSTD:
1952                 algtype = "zstd";
1953                 break;
1954         case COMPRESS_LZORLE:
1955                 algtype = "lzo-rle";
1956                 break;
1957         }
1958         seq_printf(seq, ",compress_algorithm=%s", algtype);
1959
1960         if (F2FS_OPTION(sbi).compress_level)
1961                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1962
1963         seq_printf(seq, ",compress_log_size=%u",
1964                         F2FS_OPTION(sbi).compress_log_size);
1965
1966         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1967                 seq_printf(seq, ",compress_extension=%s",
1968                         F2FS_OPTION(sbi).extensions[i]);
1969         }
1970
1971         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1972                 seq_printf(seq, ",nocompress_extension=%s",
1973                         F2FS_OPTION(sbi).noextensions[i]);
1974         }
1975
1976         if (F2FS_OPTION(sbi).compress_chksum)
1977                 seq_puts(seq, ",compress_chksum");
1978
1979         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1980                 seq_printf(seq, ",compress_mode=%s", "fs");
1981         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1982                 seq_printf(seq, ",compress_mode=%s", "user");
1983
1984         if (test_opt(sbi, COMPRESS_CACHE))
1985                 seq_puts(seq, ",compress_cache");
1986 }
1987 #endif
1988
1989 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1990 {
1991         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1992
1993         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1994                 seq_printf(seq, ",background_gc=%s", "sync");
1995         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1996                 seq_printf(seq, ",background_gc=%s", "on");
1997         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1998                 seq_printf(seq, ",background_gc=%s", "off");
1999
2000         if (test_opt(sbi, GC_MERGE))
2001                 seq_puts(seq, ",gc_merge");
2002         else
2003                 seq_puts(seq, ",nogc_merge");
2004
2005         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2006                 seq_puts(seq, ",disable_roll_forward");
2007         if (test_opt(sbi, NORECOVERY))
2008                 seq_puts(seq, ",norecovery");
2009         if (test_opt(sbi, DISCARD)) {
2010                 seq_puts(seq, ",discard");
2011                 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2012                         seq_printf(seq, ",discard_unit=%s", "block");
2013                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2014                         seq_printf(seq, ",discard_unit=%s", "segment");
2015                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2016                         seq_printf(seq, ",discard_unit=%s", "section");
2017         } else {
2018                 seq_puts(seq, ",nodiscard");
2019         }
2020         if (test_opt(sbi, NOHEAP))
2021                 seq_puts(seq, ",no_heap");
2022         else
2023                 seq_puts(seq, ",heap");
2024 #ifdef CONFIG_F2FS_FS_XATTR
2025         if (test_opt(sbi, XATTR_USER))
2026                 seq_puts(seq, ",user_xattr");
2027         else
2028                 seq_puts(seq, ",nouser_xattr");
2029         if (test_opt(sbi, INLINE_XATTR))
2030                 seq_puts(seq, ",inline_xattr");
2031         else
2032                 seq_puts(seq, ",noinline_xattr");
2033         if (test_opt(sbi, INLINE_XATTR_SIZE))
2034                 seq_printf(seq, ",inline_xattr_size=%u",
2035                                         F2FS_OPTION(sbi).inline_xattr_size);
2036 #endif
2037 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2038         if (test_opt(sbi, POSIX_ACL))
2039                 seq_puts(seq, ",acl");
2040         else
2041                 seq_puts(seq, ",noacl");
2042 #endif
2043         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
2044                 seq_puts(seq, ",disable_ext_identify");
2045         if (test_opt(sbi, INLINE_DATA))
2046                 seq_puts(seq, ",inline_data");
2047         else
2048                 seq_puts(seq, ",noinline_data");
2049         if (test_opt(sbi, INLINE_DENTRY))
2050                 seq_puts(seq, ",inline_dentry");
2051         else
2052                 seq_puts(seq, ",noinline_dentry");
2053         if (test_opt(sbi, FLUSH_MERGE))
2054                 seq_puts(seq, ",flush_merge");
2055         else
2056                 seq_puts(seq, ",noflush_merge");
2057         if (test_opt(sbi, NOBARRIER))
2058                 seq_puts(seq, ",nobarrier");
2059         else
2060                 seq_puts(seq, ",barrier");
2061         if (test_opt(sbi, FASTBOOT))
2062                 seq_puts(seq, ",fastboot");
2063         if (test_opt(sbi, READ_EXTENT_CACHE))
2064                 seq_puts(seq, ",extent_cache");
2065         else
2066                 seq_puts(seq, ",noextent_cache");
2067         if (test_opt(sbi, AGE_EXTENT_CACHE))
2068                 seq_puts(seq, ",age_extent_cache");
2069         if (test_opt(sbi, DATA_FLUSH))
2070                 seq_puts(seq, ",data_flush");
2071
2072         seq_puts(seq, ",mode=");
2073         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
2074                 seq_puts(seq, "adaptive");
2075         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
2076                 seq_puts(seq, "lfs");
2077         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
2078                 seq_puts(seq, "fragment:segment");
2079         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2080                 seq_puts(seq, "fragment:block");
2081         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
2082         if (test_opt(sbi, RESERVE_ROOT))
2083                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
2084                                 F2FS_OPTION(sbi).root_reserved_blocks,
2085                                 from_kuid_munged(&init_user_ns,
2086                                         F2FS_OPTION(sbi).s_resuid),
2087                                 from_kgid_munged(&init_user_ns,
2088                                         F2FS_OPTION(sbi).s_resgid));
2089         if (F2FS_IO_SIZE_BITS(sbi))
2090                 seq_printf(seq, ",io_bits=%u",
2091                                 F2FS_OPTION(sbi).write_io_size_bits);
2092 #ifdef CONFIG_F2FS_FAULT_INJECTION
2093         if (test_opt(sbi, FAULT_INJECTION)) {
2094                 seq_printf(seq, ",fault_injection=%u",
2095                                 F2FS_OPTION(sbi).fault_info.inject_rate);
2096                 seq_printf(seq, ",fault_type=%u",
2097                                 F2FS_OPTION(sbi).fault_info.inject_type);
2098         }
2099 #endif
2100 #ifdef CONFIG_QUOTA
2101         if (test_opt(sbi, QUOTA))
2102                 seq_puts(seq, ",quota");
2103         if (test_opt(sbi, USRQUOTA))
2104                 seq_puts(seq, ",usrquota");
2105         if (test_opt(sbi, GRPQUOTA))
2106                 seq_puts(seq, ",grpquota");
2107         if (test_opt(sbi, PRJQUOTA))
2108                 seq_puts(seq, ",prjquota");
2109 #endif
2110         f2fs_show_quota_options(seq, sbi->sb);
2111
2112         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2113
2114         if (sbi->sb->s_flags & SB_INLINECRYPT)
2115                 seq_puts(seq, ",inlinecrypt");
2116
2117         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2118                 seq_printf(seq, ",alloc_mode=%s", "default");
2119         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2120                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2121
2122         if (test_opt(sbi, DISABLE_CHECKPOINT))
2123                 seq_printf(seq, ",checkpoint=disable:%u",
2124                                 F2FS_OPTION(sbi).unusable_cap);
2125         if (test_opt(sbi, MERGE_CHECKPOINT))
2126                 seq_puts(seq, ",checkpoint_merge");
2127         else
2128                 seq_puts(seq, ",nocheckpoint_merge");
2129         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2130                 seq_printf(seq, ",fsync_mode=%s", "posix");
2131         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2132                 seq_printf(seq, ",fsync_mode=%s", "strict");
2133         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2134                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2135
2136 #ifdef CONFIG_F2FS_FS_COMPRESSION
2137         f2fs_show_compress_options(seq, sbi->sb);
2138 #endif
2139
2140         if (test_opt(sbi, ATGC))
2141                 seq_puts(seq, ",atgc");
2142
2143         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2144                 seq_printf(seq, ",memory=%s", "normal");
2145         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2146                 seq_printf(seq, ",memory=%s", "low");
2147
2148         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
2149                 seq_printf(seq, ",errors=%s", "remount-ro");
2150         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
2151                 seq_printf(seq, ",errors=%s", "continue");
2152         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
2153                 seq_printf(seq, ",errors=%s", "panic");
2154
2155         return 0;
2156 }
2157
2158 static void default_options(struct f2fs_sb_info *sbi, bool remount)
2159 {
2160         /* init some FS parameters */
2161         if (!remount) {
2162                 set_opt(sbi, READ_EXTENT_CACHE);
2163                 clear_opt(sbi, DISABLE_CHECKPOINT);
2164
2165                 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2166                         set_opt(sbi, DISCARD);
2167
2168                 if (f2fs_sb_has_blkzoned(sbi))
2169                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2170                 else
2171                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2172         }
2173
2174         if (f2fs_sb_has_readonly(sbi))
2175                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2176         else
2177                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2178
2179         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2180         if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2181                                                         SMALL_VOLUME_SEGMENTS)
2182                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2183         else
2184                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2185         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2186         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2187         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2188         if (f2fs_sb_has_compression(sbi)) {
2189                 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2190                 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2191                 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2192                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2193         }
2194         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2195         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2196         F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
2197
2198         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2199
2200         set_opt(sbi, INLINE_XATTR);
2201         set_opt(sbi, INLINE_DATA);
2202         set_opt(sbi, INLINE_DENTRY);
2203         set_opt(sbi, NOHEAP);
2204         set_opt(sbi, MERGE_CHECKPOINT);
2205         F2FS_OPTION(sbi).unusable_cap = 0;
2206         sbi->sb->s_flags |= SB_LAZYTIME;
2207         if (!f2fs_is_readonly(sbi))
2208                 set_opt(sbi, FLUSH_MERGE);
2209         if (f2fs_sb_has_blkzoned(sbi))
2210                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2211         else
2212                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2213
2214 #ifdef CONFIG_F2FS_FS_XATTR
2215         set_opt(sbi, XATTR_USER);
2216 #endif
2217 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2218         set_opt(sbi, POSIX_ACL);
2219 #endif
2220
2221         f2fs_build_fault_attr(sbi, 0, 0);
2222 }
2223
2224 #ifdef CONFIG_QUOTA
2225 static int f2fs_enable_quotas(struct super_block *sb);
2226 #endif
2227
2228 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2229 {
2230         unsigned int s_flags = sbi->sb->s_flags;
2231         struct cp_control cpc;
2232         unsigned int gc_mode = sbi->gc_mode;
2233         int err = 0;
2234         int ret;
2235         block_t unusable;
2236
2237         if (s_flags & SB_RDONLY) {
2238                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2239                 return -EINVAL;
2240         }
2241         sbi->sb->s_flags |= SB_ACTIVE;
2242
2243         /* check if we need more GC first */
2244         unusable = f2fs_get_unusable_blocks(sbi);
2245         if (!f2fs_disable_cp_again(sbi, unusable))
2246                 goto skip_gc;
2247
2248         f2fs_update_time(sbi, DISABLE_TIME);
2249
2250         sbi->gc_mode = GC_URGENT_HIGH;
2251
2252         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2253                 struct f2fs_gc_control gc_control = {
2254                         .victim_segno = NULL_SEGNO,
2255                         .init_gc_type = FG_GC,
2256                         .should_migrate_blocks = false,
2257                         .err_gc_skipped = true,
2258                         .nr_free_secs = 1 };
2259
2260                 f2fs_down_write(&sbi->gc_lock);
2261                 stat_inc_gc_call_count(sbi, FOREGROUND);
2262                 err = f2fs_gc(sbi, &gc_control);
2263                 if (err == -ENODATA) {
2264                         err = 0;
2265                         break;
2266                 }
2267                 if (err && err != -EAGAIN)
2268                         break;
2269         }
2270
2271         ret = sync_filesystem(sbi->sb);
2272         if (ret || err) {
2273                 err = ret ? ret : err;
2274                 goto restore_flag;
2275         }
2276
2277         unusable = f2fs_get_unusable_blocks(sbi);
2278         if (f2fs_disable_cp_again(sbi, unusable)) {
2279                 err = -EAGAIN;
2280                 goto restore_flag;
2281         }
2282
2283 skip_gc:
2284         f2fs_down_write(&sbi->gc_lock);
2285         cpc.reason = CP_PAUSE;
2286         set_sbi_flag(sbi, SBI_CP_DISABLED);
2287         stat_inc_cp_call_count(sbi, TOTAL_CALL);
2288         err = f2fs_write_checkpoint(sbi, &cpc);
2289         if (err)
2290                 goto out_unlock;
2291
2292         spin_lock(&sbi->stat_lock);
2293         sbi->unusable_block_count = unusable;
2294         spin_unlock(&sbi->stat_lock);
2295
2296 out_unlock:
2297         f2fs_up_write(&sbi->gc_lock);
2298 restore_flag:
2299         sbi->gc_mode = gc_mode;
2300         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2301         return err;
2302 }
2303
2304 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2305 {
2306         int retry = DEFAULT_RETRY_IO_COUNT;
2307
2308         /* we should flush all the data to keep data consistency */
2309         do {
2310                 sync_inodes_sb(sbi->sb);
2311                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2312         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2313
2314         if (unlikely(retry < 0))
2315                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2316
2317         f2fs_down_write(&sbi->gc_lock);
2318         f2fs_dirty_to_prefree(sbi);
2319
2320         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2321         set_sbi_flag(sbi, SBI_IS_DIRTY);
2322         f2fs_up_write(&sbi->gc_lock);
2323
2324         f2fs_sync_fs(sbi->sb, 1);
2325
2326         /* Let's ensure there's no pending checkpoint anymore */
2327         f2fs_flush_ckpt_thread(sbi);
2328 }
2329
2330 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2331 {
2332         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2333         struct f2fs_mount_info org_mount_opt;
2334         unsigned long old_sb_flags;
2335         int err;
2336         bool need_restart_gc = false, need_stop_gc = false;
2337         bool need_restart_flush = false, need_stop_flush = false;
2338         bool need_restart_discard = false, need_stop_discard = false;
2339         bool need_enable_checkpoint = false, need_disable_checkpoint = false;
2340         bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2341         bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2342         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2343         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2344         bool no_atgc = !test_opt(sbi, ATGC);
2345         bool no_discard = !test_opt(sbi, DISCARD);
2346         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2347         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2348 #ifdef CONFIG_QUOTA
2349         int i, j;
2350 #endif
2351
2352         /*
2353          * Save the old mount options in case we
2354          * need to restore them.
2355          */
2356         org_mount_opt = sbi->mount_opt;
2357         old_sb_flags = sb->s_flags;
2358
2359 #ifdef CONFIG_QUOTA
2360         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2361         for (i = 0; i < MAXQUOTAS; i++) {
2362                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2363                         org_mount_opt.s_qf_names[i] =
2364                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2365                                 GFP_KERNEL);
2366                         if (!org_mount_opt.s_qf_names[i]) {
2367                                 for (j = 0; j < i; j++)
2368                                         kfree(org_mount_opt.s_qf_names[j]);
2369                                 return -ENOMEM;
2370                         }
2371                 } else {
2372                         org_mount_opt.s_qf_names[i] = NULL;
2373                 }
2374         }
2375 #endif
2376
2377         /* recover superblocks we couldn't write due to previous RO mount */
2378         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2379                 err = f2fs_commit_super(sbi, false);
2380                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2381                           err);
2382                 if (!err)
2383                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2384         }
2385
2386         default_options(sbi, true);
2387
2388         /* parse mount options */
2389         err = parse_options(sb, data, true);
2390         if (err)
2391                 goto restore_opts;
2392
2393         /* flush outstanding errors before changing fs state */
2394         flush_work(&sbi->s_error_work);
2395
2396         /*
2397          * Previous and new state of filesystem is RO,
2398          * so skip checking GC and FLUSH_MERGE conditions.
2399          */
2400         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2401                 goto skip;
2402
2403         if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
2404                 err = -EROFS;
2405                 goto restore_opts;
2406         }
2407
2408 #ifdef CONFIG_QUOTA
2409         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2410                 err = dquot_suspend(sb, -1);
2411                 if (err < 0)
2412                         goto restore_opts;
2413         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2414                 /* dquot_resume needs RW */
2415                 sb->s_flags &= ~SB_RDONLY;
2416                 if (sb_any_quota_suspended(sb)) {
2417                         dquot_resume(sb, -1);
2418                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2419                         err = f2fs_enable_quotas(sb);
2420                         if (err)
2421                                 goto restore_opts;
2422                 }
2423         }
2424 #endif
2425         if (f2fs_lfs_mode(sbi) && !IS_F2FS_IPU_DISABLE(sbi)) {
2426                 err = -EINVAL;
2427                 f2fs_warn(sbi, "LFS is not compatible with IPU");
2428                 goto restore_opts;
2429         }
2430
2431         /* disallow enable atgc dynamically */
2432         if (no_atgc == !!test_opt(sbi, ATGC)) {
2433                 err = -EINVAL;
2434                 f2fs_warn(sbi, "switch atgc option is not allowed");
2435                 goto restore_opts;
2436         }
2437
2438         /* disallow enable/disable extent_cache dynamically */
2439         if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2440                 err = -EINVAL;
2441                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2442                 goto restore_opts;
2443         }
2444         /* disallow enable/disable age extent_cache dynamically */
2445         if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2446                 err = -EINVAL;
2447                 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2448                 goto restore_opts;
2449         }
2450
2451         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2452                 err = -EINVAL;
2453                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2454                 goto restore_opts;
2455         }
2456
2457         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2458                 err = -EINVAL;
2459                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2460                 goto restore_opts;
2461         }
2462
2463         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2464                 err = -EINVAL;
2465                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2466                 goto restore_opts;
2467         }
2468
2469         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2470                 err = -EINVAL;
2471                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2472                 goto restore_opts;
2473         }
2474
2475         /*
2476          * We stop the GC thread if FS is mounted as RO
2477          * or if background_gc = off is passed in mount
2478          * option. Also sync the filesystem.
2479          */
2480         if ((*flags & SB_RDONLY) ||
2481                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2482                         !test_opt(sbi, GC_MERGE))) {
2483                 if (sbi->gc_thread) {
2484                         f2fs_stop_gc_thread(sbi);
2485                         need_restart_gc = true;
2486                 }
2487         } else if (!sbi->gc_thread) {
2488                 err = f2fs_start_gc_thread(sbi);
2489                 if (err)
2490                         goto restore_opts;
2491                 need_stop_gc = true;
2492         }
2493
2494         if (*flags & SB_RDONLY) {
2495                 sync_inodes_sb(sb);
2496
2497                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2498                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2499                 f2fs_sync_fs(sb, 1);
2500                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2501         }
2502
2503         /*
2504          * We stop issue flush thread if FS is mounted as RO
2505          * or if flush_merge is not passed in mount option.
2506          */
2507         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2508                 clear_opt(sbi, FLUSH_MERGE);
2509                 f2fs_destroy_flush_cmd_control(sbi, false);
2510                 need_restart_flush = true;
2511         } else {
2512                 err = f2fs_create_flush_cmd_control(sbi);
2513                 if (err)
2514                         goto restore_gc;
2515                 need_stop_flush = true;
2516         }
2517
2518         if (no_discard == !!test_opt(sbi, DISCARD)) {
2519                 if (test_opt(sbi, DISCARD)) {
2520                         err = f2fs_start_discard_thread(sbi);
2521                         if (err)
2522                                 goto restore_flush;
2523                         need_stop_discard = true;
2524                 } else {
2525                         f2fs_stop_discard_thread(sbi);
2526                         f2fs_issue_discard_timeout(sbi);
2527                         need_restart_discard = true;
2528                 }
2529         }
2530
2531         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2532                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2533                         err = f2fs_disable_checkpoint(sbi);
2534                         if (err)
2535                                 goto restore_discard;
2536                         need_enable_checkpoint = true;
2537                 } else {
2538                         f2fs_enable_checkpoint(sbi);
2539                         need_disable_checkpoint = true;
2540                 }
2541         }
2542
2543         /*
2544          * Place this routine at the end, since a new checkpoint would be
2545          * triggered while remount and we need to take care of it before
2546          * returning from remount.
2547          */
2548         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2549                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2550                 f2fs_stop_ckpt_thread(sbi);
2551         } else {
2552                 /* Flush if the prevous checkpoint, if exists. */
2553                 f2fs_flush_ckpt_thread(sbi);
2554
2555                 err = f2fs_start_ckpt_thread(sbi);
2556                 if (err) {
2557                         f2fs_err(sbi,
2558                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2559                             err);
2560                         goto restore_checkpoint;
2561                 }
2562         }
2563
2564 skip:
2565 #ifdef CONFIG_QUOTA
2566         /* Release old quota file names */
2567         for (i = 0; i < MAXQUOTAS; i++)
2568                 kfree(org_mount_opt.s_qf_names[i]);
2569 #endif
2570         /* Update the POSIXACL Flag */
2571         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2572                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2573
2574         limit_reserve_root(sbi);
2575         adjust_unusable_cap_perc(sbi);
2576         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2577         return 0;
2578 restore_checkpoint:
2579         if (need_enable_checkpoint) {
2580                 f2fs_enable_checkpoint(sbi);
2581         } else if (need_disable_checkpoint) {
2582                 if (f2fs_disable_checkpoint(sbi))
2583                         f2fs_warn(sbi, "checkpoint has not been disabled");
2584         }
2585 restore_discard:
2586         if (need_restart_discard) {
2587                 if (f2fs_start_discard_thread(sbi))
2588                         f2fs_warn(sbi, "discard has been stopped");
2589         } else if (need_stop_discard) {
2590                 f2fs_stop_discard_thread(sbi);
2591         }
2592 restore_flush:
2593         if (need_restart_flush) {
2594                 if (f2fs_create_flush_cmd_control(sbi))
2595                         f2fs_warn(sbi, "background flush thread has stopped");
2596         } else if (need_stop_flush) {
2597                 clear_opt(sbi, FLUSH_MERGE);
2598                 f2fs_destroy_flush_cmd_control(sbi, false);
2599         }
2600 restore_gc:
2601         if (need_restart_gc) {
2602                 if (f2fs_start_gc_thread(sbi))
2603                         f2fs_warn(sbi, "background gc thread has stopped");
2604         } else if (need_stop_gc) {
2605                 f2fs_stop_gc_thread(sbi);
2606         }
2607 restore_opts:
2608 #ifdef CONFIG_QUOTA
2609         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2610         for (i = 0; i < MAXQUOTAS; i++) {
2611                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2612                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2613         }
2614 #endif
2615         sbi->mount_opt = org_mount_opt;
2616         sb->s_flags = old_sb_flags;
2617         return err;
2618 }
2619
2620 #ifdef CONFIG_QUOTA
2621 static bool f2fs_need_recovery(struct f2fs_sb_info *sbi)
2622 {
2623         /* need to recovery orphan */
2624         if (is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
2625                 return true;
2626         /* need to recovery data */
2627         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2628                 return false;
2629         if (test_opt(sbi, NORECOVERY))
2630                 return false;
2631         return !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG);
2632 }
2633
2634 static bool f2fs_recover_quota_begin(struct f2fs_sb_info *sbi)
2635 {
2636         bool readonly = f2fs_readonly(sbi->sb);
2637
2638         if (!f2fs_need_recovery(sbi))
2639                 return false;
2640
2641         /* it doesn't need to check f2fs_sb_has_readonly() */
2642         if (f2fs_hw_is_readonly(sbi))
2643                 return false;
2644
2645         if (readonly) {
2646                 sbi->sb->s_flags &= ~SB_RDONLY;
2647                 set_sbi_flag(sbi, SBI_IS_WRITABLE);
2648         }
2649
2650         /*
2651          * Turn on quotas which were not enabled for read-only mounts if
2652          * filesystem has quota feature, so that they are updated correctly.
2653          */
2654         return f2fs_enable_quota_files(sbi, readonly);
2655 }
2656
2657 static void f2fs_recover_quota_end(struct f2fs_sb_info *sbi,
2658                                                 bool quota_enabled)
2659 {
2660         if (quota_enabled)
2661                 f2fs_quota_off_umount(sbi->sb);
2662
2663         if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE)) {
2664                 clear_sbi_flag(sbi, SBI_IS_WRITABLE);
2665                 sbi->sb->s_flags |= SB_RDONLY;
2666         }
2667 }
2668
2669 /* Read data from quotafile */
2670 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2671                                size_t len, loff_t off)
2672 {
2673         struct inode *inode = sb_dqopt(sb)->files[type];
2674         struct address_space *mapping = inode->i_mapping;
2675         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2676         int offset = off & (sb->s_blocksize - 1);
2677         int tocopy;
2678         size_t toread;
2679         loff_t i_size = i_size_read(inode);
2680         struct page *page;
2681
2682         if (off > i_size)
2683                 return 0;
2684
2685         if (off + len > i_size)
2686                 len = i_size - off;
2687         toread = len;
2688         while (toread > 0) {
2689                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2690 repeat:
2691                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2692                 if (IS_ERR(page)) {
2693                         if (PTR_ERR(page) == -ENOMEM) {
2694                                 memalloc_retry_wait(GFP_NOFS);
2695                                 goto repeat;
2696                         }
2697                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2698                         return PTR_ERR(page);
2699                 }
2700
2701                 lock_page(page);
2702
2703                 if (unlikely(page->mapping != mapping)) {
2704                         f2fs_put_page(page, 1);
2705                         goto repeat;
2706                 }
2707                 if (unlikely(!PageUptodate(page))) {
2708                         f2fs_put_page(page, 1);
2709                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2710                         return -EIO;
2711                 }
2712
2713                 memcpy_from_page(data, page, offset, tocopy);
2714                 f2fs_put_page(page, 1);
2715
2716                 offset = 0;
2717                 toread -= tocopy;
2718                 data += tocopy;
2719                 blkidx++;
2720         }
2721         return len;
2722 }
2723
2724 /* Write to quotafile */
2725 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2726                                 const char *data, size_t len, loff_t off)
2727 {
2728         struct inode *inode = sb_dqopt(sb)->files[type];
2729         struct address_space *mapping = inode->i_mapping;
2730         const struct address_space_operations *a_ops = mapping->a_ops;
2731         int offset = off & (sb->s_blocksize - 1);
2732         size_t towrite = len;
2733         struct page *page;
2734         void *fsdata = NULL;
2735         int err = 0;
2736         int tocopy;
2737
2738         while (towrite > 0) {
2739                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2740                                                                 towrite);
2741 retry:
2742                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2743                                                         &page, &fsdata);
2744                 if (unlikely(err)) {
2745                         if (err == -ENOMEM) {
2746                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2747                                 goto retry;
2748                         }
2749                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2750                         break;
2751                 }
2752
2753                 memcpy_to_page(page, offset, data, tocopy);
2754
2755                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2756                                                 page, fsdata);
2757                 offset = 0;
2758                 towrite -= tocopy;
2759                 off += tocopy;
2760                 data += tocopy;
2761                 cond_resched();
2762         }
2763
2764         if (len == towrite)
2765                 return err;
2766         inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
2767         f2fs_mark_inode_dirty_sync(inode, false);
2768         return len - towrite;
2769 }
2770
2771 int f2fs_dquot_initialize(struct inode *inode)
2772 {
2773         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT))
2774                 return -ESRCH;
2775
2776         return dquot_initialize(inode);
2777 }
2778
2779 static struct dquot **f2fs_get_dquots(struct inode *inode)
2780 {
2781         return F2FS_I(inode)->i_dquot;
2782 }
2783
2784 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2785 {
2786         return &F2FS_I(inode)->i_reserved_quota;
2787 }
2788
2789 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2790 {
2791         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2792                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2793                 return 0;
2794         }
2795
2796         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2797                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2798 }
2799
2800 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2801 {
2802         int enabled = 0;
2803         int i, err;
2804
2805         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2806                 err = f2fs_enable_quotas(sbi->sb);
2807                 if (err) {
2808                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2809                         return 0;
2810                 }
2811                 return 1;
2812         }
2813
2814         for (i = 0; i < MAXQUOTAS; i++) {
2815                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2816                         err = f2fs_quota_on_mount(sbi, i);
2817                         if (!err) {
2818                                 enabled = 1;
2819                                 continue;
2820                         }
2821                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2822                                  err, i);
2823                 }
2824         }
2825         return enabled;
2826 }
2827
2828 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2829                              unsigned int flags)
2830 {
2831         struct inode *qf_inode;
2832         unsigned long qf_inum;
2833         unsigned long qf_flag = F2FS_QUOTA_DEFAULT_FL;
2834         int err;
2835
2836         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2837
2838         qf_inum = f2fs_qf_ino(sb, type);
2839         if (!qf_inum)
2840                 return -EPERM;
2841
2842         qf_inode = f2fs_iget(sb, qf_inum);
2843         if (IS_ERR(qf_inode)) {
2844                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2845                 return PTR_ERR(qf_inode);
2846         }
2847
2848         /* Don't account quota for quota files to avoid recursion */
2849         inode_lock(qf_inode);
2850         qf_inode->i_flags |= S_NOQUOTA;
2851
2852         if ((F2FS_I(qf_inode)->i_flags & qf_flag) != qf_flag) {
2853                 F2FS_I(qf_inode)->i_flags |= qf_flag;
2854                 f2fs_set_inode_flags(qf_inode);
2855         }
2856         inode_unlock(qf_inode);
2857
2858         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2859         iput(qf_inode);
2860         return err;
2861 }
2862
2863 static int f2fs_enable_quotas(struct super_block *sb)
2864 {
2865         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2866         int type, err = 0;
2867         unsigned long qf_inum;
2868         bool quota_mopt[MAXQUOTAS] = {
2869                 test_opt(sbi, USRQUOTA),
2870                 test_opt(sbi, GRPQUOTA),
2871                 test_opt(sbi, PRJQUOTA),
2872         };
2873
2874         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2875                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2876                 return 0;
2877         }
2878
2879         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2880
2881         for (type = 0; type < MAXQUOTAS; type++) {
2882                 qf_inum = f2fs_qf_ino(sb, type);
2883                 if (qf_inum) {
2884                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2885                                 DQUOT_USAGE_ENABLED |
2886                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2887                         if (err) {
2888                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2889                                          type, err);
2890                                 for (type--; type >= 0; type--)
2891                                         dquot_quota_off(sb, type);
2892                                 set_sbi_flag(F2FS_SB(sb),
2893                                                 SBI_QUOTA_NEED_REPAIR);
2894                                 return err;
2895                         }
2896                 }
2897         }
2898         return 0;
2899 }
2900
2901 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2902 {
2903         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2904         struct address_space *mapping = dqopt->files[type]->i_mapping;
2905         int ret = 0;
2906
2907         ret = dquot_writeback_dquots(sbi->sb, type);
2908         if (ret)
2909                 goto out;
2910
2911         ret = filemap_fdatawrite(mapping);
2912         if (ret)
2913                 goto out;
2914
2915         /* if we are using journalled quota */
2916         if (is_journalled_quota(sbi))
2917                 goto out;
2918
2919         ret = filemap_fdatawait(mapping);
2920
2921         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2922 out:
2923         if (ret)
2924                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2925         return ret;
2926 }
2927
2928 int f2fs_quota_sync(struct super_block *sb, int type)
2929 {
2930         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2931         struct quota_info *dqopt = sb_dqopt(sb);
2932         int cnt;
2933         int ret = 0;
2934
2935         /*
2936          * Now when everything is written we can discard the pagecache so
2937          * that userspace sees the changes.
2938          */
2939         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2940
2941                 if (type != -1 && cnt != type)
2942                         continue;
2943
2944                 if (!sb_has_quota_active(sb, cnt))
2945                         continue;
2946
2947                 if (!f2fs_sb_has_quota_ino(sbi))
2948                         inode_lock(dqopt->files[cnt]);
2949
2950                 /*
2951                  * do_quotactl
2952                  *  f2fs_quota_sync
2953                  *  f2fs_down_read(quota_sem)
2954                  *  dquot_writeback_dquots()
2955                  *  f2fs_dquot_commit
2956                  *                            block_operation
2957                  *                            f2fs_down_read(quota_sem)
2958                  */
2959                 f2fs_lock_op(sbi);
2960                 f2fs_down_read(&sbi->quota_sem);
2961
2962                 ret = f2fs_quota_sync_file(sbi, cnt);
2963
2964                 f2fs_up_read(&sbi->quota_sem);
2965                 f2fs_unlock_op(sbi);
2966
2967                 if (!f2fs_sb_has_quota_ino(sbi))
2968                         inode_unlock(dqopt->files[cnt]);
2969
2970                 if (ret)
2971                         break;
2972         }
2973         return ret;
2974 }
2975
2976 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2977                                                         const struct path *path)
2978 {
2979         struct inode *inode;
2980         int err;
2981
2982         /* if quota sysfile exists, deny enabling quota with specific file */
2983         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2984                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2985                 return -EBUSY;
2986         }
2987
2988         if (path->dentry->d_sb != sb)
2989                 return -EXDEV;
2990
2991         err = f2fs_quota_sync(sb, type);
2992         if (err)
2993                 return err;
2994
2995         inode = d_inode(path->dentry);
2996
2997         err = filemap_fdatawrite(inode->i_mapping);
2998         if (err)
2999                 return err;
3000
3001         err = filemap_fdatawait(inode->i_mapping);
3002         if (err)
3003                 return err;
3004
3005         err = dquot_quota_on(sb, type, format_id, path);
3006         if (err)
3007                 return err;
3008
3009         inode_lock(inode);
3010         F2FS_I(inode)->i_flags |= F2FS_QUOTA_DEFAULT_FL;
3011         f2fs_set_inode_flags(inode);
3012         inode_unlock(inode);
3013         f2fs_mark_inode_dirty_sync(inode, false);
3014
3015         return 0;
3016 }
3017
3018 static int __f2fs_quota_off(struct super_block *sb, int type)
3019 {
3020         struct inode *inode = sb_dqopt(sb)->files[type];
3021         int err;
3022
3023         if (!inode || !igrab(inode))
3024                 return dquot_quota_off(sb, type);
3025
3026         err = f2fs_quota_sync(sb, type);
3027         if (err)
3028                 goto out_put;
3029
3030         err = dquot_quota_off(sb, type);
3031         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
3032                 goto out_put;
3033
3034         inode_lock(inode);
3035         F2FS_I(inode)->i_flags &= ~F2FS_QUOTA_DEFAULT_FL;
3036         f2fs_set_inode_flags(inode);
3037         inode_unlock(inode);
3038         f2fs_mark_inode_dirty_sync(inode, false);
3039 out_put:
3040         iput(inode);
3041         return err;
3042 }
3043
3044 static int f2fs_quota_off(struct super_block *sb, int type)
3045 {
3046         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3047         int err;
3048
3049         err = __f2fs_quota_off(sb, type);
3050
3051         /*
3052          * quotactl can shutdown journalled quota, result in inconsistence
3053          * between quota record and fs data by following updates, tag the
3054          * flag to let fsck be aware of it.
3055          */
3056         if (is_journalled_quota(sbi))
3057                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3058         return err;
3059 }
3060
3061 void f2fs_quota_off_umount(struct super_block *sb)
3062 {
3063         int type;
3064         int err;
3065
3066         for (type = 0; type < MAXQUOTAS; type++) {
3067                 err = __f2fs_quota_off(sb, type);
3068                 if (err) {
3069                         int ret = dquot_quota_off(sb, type);
3070
3071                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
3072                                  type, err, ret);
3073                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
3074                 }
3075         }
3076         /*
3077          * In case of checkpoint=disable, we must flush quota blocks.
3078          * This can cause NULL exception for node_inode in end_io, since
3079          * put_super already dropped it.
3080          */
3081         sync_filesystem(sb);
3082 }
3083
3084 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
3085 {
3086         struct quota_info *dqopt = sb_dqopt(sb);
3087         int type;
3088
3089         for (type = 0; type < MAXQUOTAS; type++) {
3090                 if (!dqopt->files[type])
3091                         continue;
3092                 f2fs_inode_synced(dqopt->files[type]);
3093         }
3094 }
3095
3096 static int f2fs_dquot_commit(struct dquot *dquot)
3097 {
3098         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3099         int ret;
3100
3101         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
3102         ret = dquot_commit(dquot);
3103         if (ret < 0)
3104                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3105         f2fs_up_read(&sbi->quota_sem);
3106         return ret;
3107 }
3108
3109 static int f2fs_dquot_acquire(struct dquot *dquot)
3110 {
3111         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3112         int ret;
3113
3114         f2fs_down_read(&sbi->quota_sem);
3115         ret = dquot_acquire(dquot);
3116         if (ret < 0)
3117                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3118         f2fs_up_read(&sbi->quota_sem);
3119         return ret;
3120 }
3121
3122 static int f2fs_dquot_release(struct dquot *dquot)
3123 {
3124         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3125         int ret = dquot_release(dquot);
3126
3127         if (ret < 0)
3128                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3129         return ret;
3130 }
3131
3132 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
3133 {
3134         struct super_block *sb = dquot->dq_sb;
3135         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3136         int ret = dquot_mark_dquot_dirty(dquot);
3137
3138         /* if we are using journalled quota */
3139         if (is_journalled_quota(sbi))
3140                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
3141
3142         return ret;
3143 }
3144
3145 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
3146 {
3147         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3148         int ret = dquot_commit_info(sb, type);
3149
3150         if (ret < 0)
3151                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3152         return ret;
3153 }
3154
3155 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
3156 {
3157         *projid = F2FS_I(inode)->i_projid;
3158         return 0;
3159 }
3160
3161 static const struct dquot_operations f2fs_quota_operations = {
3162         .get_reserved_space = f2fs_get_reserved_space,
3163         .write_dquot    = f2fs_dquot_commit,
3164         .acquire_dquot  = f2fs_dquot_acquire,
3165         .release_dquot  = f2fs_dquot_release,
3166         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
3167         .write_info     = f2fs_dquot_commit_info,
3168         .alloc_dquot    = dquot_alloc,
3169         .destroy_dquot  = dquot_destroy,
3170         .get_projid     = f2fs_get_projid,
3171         .get_next_id    = dquot_get_next_id,
3172 };
3173
3174 static const struct quotactl_ops f2fs_quotactl_ops = {
3175         .quota_on       = f2fs_quota_on,
3176         .quota_off      = f2fs_quota_off,
3177         .quota_sync     = f2fs_quota_sync,
3178         .get_state      = dquot_get_state,
3179         .set_info       = dquot_set_dqinfo,
3180         .get_dqblk      = dquot_get_dqblk,
3181         .set_dqblk      = dquot_set_dqblk,
3182         .get_nextdqblk  = dquot_get_next_dqblk,
3183 };
3184 #else
3185 int f2fs_dquot_initialize(struct inode *inode)
3186 {
3187         return 0;
3188 }
3189
3190 int f2fs_quota_sync(struct super_block *sb, int type)
3191 {
3192         return 0;
3193 }
3194
3195 void f2fs_quota_off_umount(struct super_block *sb)
3196 {
3197 }
3198 #endif
3199
3200 static const struct super_operations f2fs_sops = {
3201         .alloc_inode    = f2fs_alloc_inode,
3202         .free_inode     = f2fs_free_inode,
3203         .drop_inode     = f2fs_drop_inode,
3204         .write_inode    = f2fs_write_inode,
3205         .dirty_inode    = f2fs_dirty_inode,
3206         .show_options   = f2fs_show_options,
3207 #ifdef CONFIG_QUOTA
3208         .quota_read     = f2fs_quota_read,
3209         .quota_write    = f2fs_quota_write,
3210         .get_dquots     = f2fs_get_dquots,
3211 #endif
3212         .evict_inode    = f2fs_evict_inode,
3213         .put_super      = f2fs_put_super,
3214         .sync_fs        = f2fs_sync_fs,
3215         .freeze_fs      = f2fs_freeze,
3216         .unfreeze_fs    = f2fs_unfreeze,
3217         .statfs         = f2fs_statfs,
3218         .remount_fs     = f2fs_remount,
3219 };
3220
3221 #ifdef CONFIG_FS_ENCRYPTION
3222 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3223 {
3224         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3225                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3226                                 ctx, len, NULL);
3227 }
3228
3229 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3230                                                         void *fs_data)
3231 {
3232         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3233
3234         /*
3235          * Encrypting the root directory is not allowed because fsck
3236          * expects lost+found directory to exist and remain unencrypted
3237          * if LOST_FOUND feature is enabled.
3238          *
3239          */
3240         if (f2fs_sb_has_lost_found(sbi) &&
3241                         inode->i_ino == F2FS_ROOT_INO(sbi))
3242                 return -EPERM;
3243
3244         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3245                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3246                                 ctx, len, fs_data, XATTR_CREATE);
3247 }
3248
3249 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3250 {
3251         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3252 }
3253
3254 static bool f2fs_has_stable_inodes(struct super_block *sb)
3255 {
3256         return true;
3257 }
3258
3259 static struct block_device **f2fs_get_devices(struct super_block *sb,
3260                                               unsigned int *num_devs)
3261 {
3262         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3263         struct block_device **devs;
3264         int i;
3265
3266         if (!f2fs_is_multi_device(sbi))
3267                 return NULL;
3268
3269         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3270         if (!devs)
3271                 return ERR_PTR(-ENOMEM);
3272
3273         for (i = 0; i < sbi->s_ndevs; i++)
3274                 devs[i] = FDEV(i).bdev;
3275         *num_devs = sbi->s_ndevs;
3276         return devs;
3277 }
3278
3279 static const struct fscrypt_operations f2fs_cryptops = {
3280         .needs_bounce_pages     = 1,
3281         .has_32bit_inodes       = 1,
3282         .supports_subblock_data_units = 1,
3283         .legacy_key_prefix      = "f2fs:",
3284         .get_context            = f2fs_get_context,
3285         .set_context            = f2fs_set_context,
3286         .get_dummy_policy       = f2fs_get_dummy_policy,
3287         .empty_dir              = f2fs_empty_dir,
3288         .has_stable_inodes      = f2fs_has_stable_inodes,
3289         .get_devices            = f2fs_get_devices,
3290 };
3291 #endif
3292
3293 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3294                 u64 ino, u32 generation)
3295 {
3296         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3297         struct inode *inode;
3298
3299         if (f2fs_check_nid_range(sbi, ino))
3300                 return ERR_PTR(-ESTALE);
3301
3302         /*
3303          * f2fs_iget isn't quite right if the inode is currently unallocated!
3304          * However f2fs_iget currently does appropriate checks to handle stale
3305          * inodes so everything is OK.
3306          */
3307         inode = f2fs_iget(sb, ino);
3308         if (IS_ERR(inode))
3309                 return ERR_CAST(inode);
3310         if (unlikely(generation && inode->i_generation != generation)) {
3311                 /* we didn't find the right inode.. */
3312                 iput(inode);
3313                 return ERR_PTR(-ESTALE);
3314         }
3315         return inode;
3316 }
3317
3318 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3319                 int fh_len, int fh_type)
3320 {
3321         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3322                                     f2fs_nfs_get_inode);
3323 }
3324
3325 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3326                 int fh_len, int fh_type)
3327 {
3328         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3329                                     f2fs_nfs_get_inode);
3330 }
3331
3332 static const struct export_operations f2fs_export_ops = {
3333         .fh_to_dentry = f2fs_fh_to_dentry,
3334         .fh_to_parent = f2fs_fh_to_parent,
3335         .get_parent = f2fs_get_parent,
3336 };
3337
3338 loff_t max_file_blocks(struct inode *inode)
3339 {
3340         loff_t result = 0;
3341         loff_t leaf_count;
3342
3343         /*
3344          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3345          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3346          * space in inode.i_addr, it will be more safe to reassign
3347          * result as zero.
3348          */
3349
3350         if (inode && f2fs_compressed_file(inode))
3351                 leaf_count = ADDRS_PER_BLOCK(inode);
3352         else
3353                 leaf_count = DEF_ADDRS_PER_BLOCK;
3354
3355         /* two direct node blocks */
3356         result += (leaf_count * 2);
3357
3358         /* two indirect node blocks */
3359         leaf_count *= NIDS_PER_BLOCK;
3360         result += (leaf_count * 2);
3361
3362         /* one double indirect node block */
3363         leaf_count *= NIDS_PER_BLOCK;
3364         result += leaf_count;
3365
3366         return result;
3367 }
3368
3369 static int __f2fs_commit_super(struct buffer_head *bh,
3370                         struct f2fs_super_block *super)
3371 {
3372         lock_buffer(bh);
3373         if (super)
3374                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3375         set_buffer_dirty(bh);
3376         unlock_buffer(bh);
3377
3378         /* it's rare case, we can do fua all the time */
3379         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3380 }
3381
3382 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3383                                         struct buffer_head *bh)
3384 {
3385         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3386                                         (bh->b_data + F2FS_SUPER_OFFSET);
3387         struct super_block *sb = sbi->sb;
3388         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3389         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3390         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3391         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3392         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3393         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3394         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3395         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3396         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3397         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3398         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3399         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3400         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3401         u64 main_end_blkaddr = main_blkaddr +
3402                                 (segment_count_main << log_blocks_per_seg);
3403         u64 seg_end_blkaddr = segment0_blkaddr +
3404                                 (segment_count << log_blocks_per_seg);
3405
3406         if (segment0_blkaddr != cp_blkaddr) {
3407                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3408                           segment0_blkaddr, cp_blkaddr);
3409                 return true;
3410         }
3411
3412         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3413                                                         sit_blkaddr) {
3414                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3415                           cp_blkaddr, sit_blkaddr,
3416                           segment_count_ckpt << log_blocks_per_seg);
3417                 return true;
3418         }
3419
3420         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3421                                                         nat_blkaddr) {
3422                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3423                           sit_blkaddr, nat_blkaddr,
3424                           segment_count_sit << log_blocks_per_seg);
3425                 return true;
3426         }
3427
3428         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3429                                                         ssa_blkaddr) {
3430                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3431                           nat_blkaddr, ssa_blkaddr,
3432                           segment_count_nat << log_blocks_per_seg);
3433                 return true;
3434         }
3435
3436         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3437                                                         main_blkaddr) {
3438                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3439                           ssa_blkaddr, main_blkaddr,
3440                           segment_count_ssa << log_blocks_per_seg);
3441                 return true;
3442         }
3443
3444         if (main_end_blkaddr > seg_end_blkaddr) {
3445                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3446                           main_blkaddr, seg_end_blkaddr,
3447                           segment_count_main << log_blocks_per_seg);
3448                 return true;
3449         } else if (main_end_blkaddr < seg_end_blkaddr) {
3450                 int err = 0;
3451                 char *res;
3452
3453                 /* fix in-memory information all the time */
3454                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3455                                 segment0_blkaddr) >> log_blocks_per_seg);
3456
3457                 if (f2fs_readonly(sb) || f2fs_hw_is_readonly(sbi)) {
3458                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3459                         res = "internally";
3460                 } else {
3461                         err = __f2fs_commit_super(bh, NULL);
3462                         res = err ? "failed" : "done";
3463                 }
3464                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3465                           res, main_blkaddr, seg_end_blkaddr,
3466                           segment_count_main << log_blocks_per_seg);
3467                 if (err)
3468                         return true;
3469         }
3470         return false;
3471 }
3472
3473 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3474                                 struct buffer_head *bh)
3475 {
3476         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3477         block_t total_sections, blocks_per_seg;
3478         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3479                                         (bh->b_data + F2FS_SUPER_OFFSET);
3480         size_t crc_offset = 0;
3481         __u32 crc = 0;
3482
3483         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3484                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3485                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3486                 return -EINVAL;
3487         }
3488
3489         /* Check checksum_offset and crc in superblock */
3490         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3491                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3492                 if (crc_offset !=
3493                         offsetof(struct f2fs_super_block, crc)) {
3494                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3495                                   crc_offset);
3496                         return -EFSCORRUPTED;
3497                 }
3498                 crc = le32_to_cpu(raw_super->crc);
3499                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3500                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3501                         return -EFSCORRUPTED;
3502                 }
3503         }
3504
3505         /* Currently, support only 4KB block size */
3506         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3507                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3508                           le32_to_cpu(raw_super->log_blocksize),
3509                           F2FS_BLKSIZE_BITS);
3510                 return -EFSCORRUPTED;
3511         }
3512
3513         /* check log blocks per segment */
3514         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3515                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3516                           le32_to_cpu(raw_super->log_blocks_per_seg));
3517                 return -EFSCORRUPTED;
3518         }
3519
3520         /* Currently, support 512/1024/2048/4096/16K bytes sector size */
3521         if (le32_to_cpu(raw_super->log_sectorsize) >
3522                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3523                 le32_to_cpu(raw_super->log_sectorsize) <
3524                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3525                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3526                           le32_to_cpu(raw_super->log_sectorsize));
3527                 return -EFSCORRUPTED;
3528         }
3529         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3530                 le32_to_cpu(raw_super->log_sectorsize) !=
3531                         F2FS_MAX_LOG_SECTOR_SIZE) {
3532                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3533                           le32_to_cpu(raw_super->log_sectors_per_block),
3534                           le32_to_cpu(raw_super->log_sectorsize));
3535                 return -EFSCORRUPTED;
3536         }
3537
3538         segment_count = le32_to_cpu(raw_super->segment_count);
3539         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3540         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3541         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3542         total_sections = le32_to_cpu(raw_super->section_count);
3543
3544         /* blocks_per_seg should be 512, given the above check */
3545         blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg));
3546
3547         if (segment_count > F2FS_MAX_SEGMENT ||
3548                                 segment_count < F2FS_MIN_SEGMENTS) {
3549                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3550                 return -EFSCORRUPTED;
3551         }
3552
3553         if (total_sections > segment_count_main || total_sections < 1 ||
3554                         segs_per_sec > segment_count || !segs_per_sec) {
3555                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3556                           segment_count, total_sections, segs_per_sec);
3557                 return -EFSCORRUPTED;
3558         }
3559
3560         if (segment_count_main != total_sections * segs_per_sec) {
3561                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3562                           segment_count_main, total_sections, segs_per_sec);
3563                 return -EFSCORRUPTED;
3564         }
3565
3566         if ((segment_count / segs_per_sec) < total_sections) {
3567                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3568                           segment_count, segs_per_sec, total_sections);
3569                 return -EFSCORRUPTED;
3570         }
3571
3572         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3573                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3574                           segment_count, le64_to_cpu(raw_super->block_count));
3575                 return -EFSCORRUPTED;
3576         }
3577
3578         if (RDEV(0).path[0]) {
3579                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3580                 int i = 1;
3581
3582                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3583                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3584                         i++;
3585                 }
3586                 if (segment_count != dev_seg_count) {
3587                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3588                                         segment_count, dev_seg_count);
3589                         return -EFSCORRUPTED;
3590                 }
3591         } else {
3592                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3593                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3594                         f2fs_info(sbi, "Zoned block device path is missing");
3595                         return -EFSCORRUPTED;
3596                 }
3597         }
3598
3599         if (secs_per_zone > total_sections || !secs_per_zone) {
3600                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3601                           secs_per_zone, total_sections);
3602                 return -EFSCORRUPTED;
3603         }
3604         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3605                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3606                         (le32_to_cpu(raw_super->extension_count) +
3607                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3608                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3609                           le32_to_cpu(raw_super->extension_count),
3610                           raw_super->hot_ext_count,
3611                           F2FS_MAX_EXTENSION);
3612                 return -EFSCORRUPTED;
3613         }
3614
3615         if (le32_to_cpu(raw_super->cp_payload) >=
3616                                 (blocks_per_seg - F2FS_CP_PACKS -
3617                                 NR_CURSEG_PERSIST_TYPE)) {
3618                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3619                           le32_to_cpu(raw_super->cp_payload),
3620                           blocks_per_seg - F2FS_CP_PACKS -
3621                           NR_CURSEG_PERSIST_TYPE);
3622                 return -EFSCORRUPTED;
3623         }
3624
3625         /* check reserved ino info */
3626         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3627                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3628                 le32_to_cpu(raw_super->root_ino) != 3) {
3629                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3630                           le32_to_cpu(raw_super->node_ino),
3631                           le32_to_cpu(raw_super->meta_ino),
3632                           le32_to_cpu(raw_super->root_ino));
3633                 return -EFSCORRUPTED;
3634         }
3635
3636         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3637         if (sanity_check_area_boundary(sbi, bh))
3638                 return -EFSCORRUPTED;
3639
3640         return 0;
3641 }
3642
3643 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3644 {
3645         unsigned int total, fsmeta;
3646         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3647         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3648         unsigned int ovp_segments, reserved_segments;
3649         unsigned int main_segs, blocks_per_seg;
3650         unsigned int sit_segs, nat_segs;
3651         unsigned int sit_bitmap_size, nat_bitmap_size;
3652         unsigned int log_blocks_per_seg;
3653         unsigned int segment_count_main;
3654         unsigned int cp_pack_start_sum, cp_payload;
3655         block_t user_block_count, valid_user_blocks;
3656         block_t avail_node_count, valid_node_count;
3657         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3658         int i, j;
3659
3660         total = le32_to_cpu(raw_super->segment_count);
3661         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3662         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3663         fsmeta += sit_segs;
3664         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3665         fsmeta += nat_segs;
3666         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3667         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3668
3669         if (unlikely(fsmeta >= total))
3670                 return 1;
3671
3672         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3673         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3674
3675         if (!f2fs_sb_has_readonly(sbi) &&
3676                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3677                         ovp_segments == 0 || reserved_segments == 0)) {
3678                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3679                 return 1;
3680         }
3681         user_block_count = le64_to_cpu(ckpt->user_block_count);
3682         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3683                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3684         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3685         if (!user_block_count || user_block_count >=
3686                         segment_count_main << log_blocks_per_seg) {
3687                 f2fs_err(sbi, "Wrong user_block_count: %u",
3688                          user_block_count);
3689                 return 1;
3690         }
3691
3692         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3693         if (valid_user_blocks > user_block_count) {
3694                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3695                          valid_user_blocks, user_block_count);
3696                 return 1;
3697         }
3698
3699         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3700         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3701         if (valid_node_count > avail_node_count) {
3702                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3703                          valid_node_count, avail_node_count);
3704                 return 1;
3705         }
3706
3707         main_segs = le32_to_cpu(raw_super->segment_count_main);
3708         blocks_per_seg = sbi->blocks_per_seg;
3709
3710         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3711                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3712                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3713                         return 1;
3714
3715                 if (f2fs_sb_has_readonly(sbi))
3716                         goto check_data;
3717
3718                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3719                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3720                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3721                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3722                                          i, j,
3723                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3724                                 return 1;
3725                         }
3726                 }
3727         }
3728 check_data:
3729         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3730                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3731                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3732                         return 1;
3733
3734                 if (f2fs_sb_has_readonly(sbi))
3735                         goto skip_cross;
3736
3737                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3738                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3739                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3740                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3741                                          i, j,
3742                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3743                                 return 1;
3744                         }
3745                 }
3746         }
3747         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3748                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3749                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3750                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3751                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3752                                          i, j,
3753                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3754                                 return 1;
3755                         }
3756                 }
3757         }
3758 skip_cross:
3759         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3760         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3761
3762         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3763                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3764                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3765                          sit_bitmap_size, nat_bitmap_size);
3766                 return 1;
3767         }
3768
3769         cp_pack_start_sum = __start_sum_addr(sbi);
3770         cp_payload = __cp_payload(sbi);
3771         if (cp_pack_start_sum < cp_payload + 1 ||
3772                 cp_pack_start_sum > blocks_per_seg - 1 -
3773                         NR_CURSEG_PERSIST_TYPE) {
3774                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3775                          cp_pack_start_sum);
3776                 return 1;
3777         }
3778
3779         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3780                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3781                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3782                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3783                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3784                           le32_to_cpu(ckpt->checksum_offset));
3785                 return 1;
3786         }
3787
3788         nat_blocks = nat_segs << log_blocks_per_seg;
3789         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3790         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3791         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3792                 (cp_payload + F2FS_CP_PACKS +
3793                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3794                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3795                           cp_payload, nat_bits_blocks);
3796                 return 1;
3797         }
3798
3799         if (unlikely(f2fs_cp_error(sbi))) {
3800                 f2fs_err(sbi, "A bug case: need to run fsck");
3801                 return 1;
3802         }
3803         return 0;
3804 }
3805
3806 static void init_sb_info(struct f2fs_sb_info *sbi)
3807 {
3808         struct f2fs_super_block *raw_super = sbi->raw_super;
3809         int i;
3810
3811         sbi->log_sectors_per_block =
3812                 le32_to_cpu(raw_super->log_sectors_per_block);
3813         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3814         sbi->blocksize = BIT(sbi->log_blocksize);
3815         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3816         sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg);
3817         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3818         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3819         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3820         sbi->total_node_count =
3821                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3822                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3823         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3824         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3825         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3826         sbi->cur_victim_sec = NULL_SECNO;
3827         sbi->gc_mode = GC_NORMAL;
3828         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3829         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3830         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3831         sbi->migration_granularity = sbi->segs_per_sec;
3832         sbi->seq_file_ra_mul = MIN_RA_MUL;
3833         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3834         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3835         spin_lock_init(&sbi->gc_remaining_trials_lock);
3836         atomic64_set(&sbi->current_atomic_write, 0);
3837
3838         sbi->dir_level = DEF_DIR_LEVEL;
3839         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3840         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3841         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3842         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3843         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3844         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3845                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3846         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3847
3848         for (i = 0; i < NR_COUNT_TYPE; i++)
3849                 atomic_set(&sbi->nr_pages[i], 0);
3850
3851         for (i = 0; i < META; i++)
3852                 atomic_set(&sbi->wb_sync_req[i], 0);
3853
3854         INIT_LIST_HEAD(&sbi->s_list);
3855         mutex_init(&sbi->umount_mutex);
3856         init_f2fs_rwsem(&sbi->io_order_lock);
3857         spin_lock_init(&sbi->cp_lock);
3858
3859         sbi->dirty_device = 0;
3860         spin_lock_init(&sbi->dev_lock);
3861
3862         init_f2fs_rwsem(&sbi->sb_lock);
3863         init_f2fs_rwsem(&sbi->pin_sem);
3864 }
3865
3866 static int init_percpu_info(struct f2fs_sb_info *sbi)
3867 {
3868         int err;
3869
3870         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3871         if (err)
3872                 return err;
3873
3874         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3875         if (err)
3876                 goto err_valid_block;
3877
3878         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3879                                                                 GFP_KERNEL);
3880         if (err)
3881                 goto err_node_block;
3882         return 0;
3883
3884 err_node_block:
3885         percpu_counter_destroy(&sbi->rf_node_block_count);
3886 err_valid_block:
3887         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3888         return err;
3889 }
3890
3891 #ifdef CONFIG_BLK_DEV_ZONED
3892
3893 struct f2fs_report_zones_args {
3894         struct f2fs_sb_info *sbi;
3895         struct f2fs_dev_info *dev;
3896 };
3897
3898 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3899                               void *data)
3900 {
3901         struct f2fs_report_zones_args *rz_args = data;
3902         block_t unusable_blocks = (zone->len - zone->capacity) >>
3903                                         F2FS_LOG_SECTORS_PER_BLOCK;
3904
3905         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3906                 return 0;
3907
3908         set_bit(idx, rz_args->dev->blkz_seq);
3909         if (!rz_args->sbi->unusable_blocks_per_sec) {
3910                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3911                 return 0;
3912         }
3913         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3914                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3915                 return -EINVAL;
3916         }
3917         return 0;
3918 }
3919
3920 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3921 {
3922         struct block_device *bdev = FDEV(devi).bdev;
3923         sector_t nr_sectors = bdev_nr_sectors(bdev);
3924         struct f2fs_report_zones_args rep_zone_arg;
3925         u64 zone_sectors;
3926         int ret;
3927
3928         if (!f2fs_sb_has_blkzoned(sbi))
3929                 return 0;
3930
3931         zone_sectors = bdev_zone_sectors(bdev);
3932         if (!is_power_of_2(zone_sectors)) {
3933                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3934                 return -EINVAL;
3935         }
3936
3937         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3938                                 SECTOR_TO_BLOCK(zone_sectors))
3939                 return -EINVAL;
3940         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3941         FDEV(devi).nr_blkz = div_u64(SECTOR_TO_BLOCK(nr_sectors),
3942                                         sbi->blocks_per_blkz);
3943         if (nr_sectors & (zone_sectors - 1))
3944                 FDEV(devi).nr_blkz++;
3945
3946         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3947                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3948                                         * sizeof(unsigned long),
3949                                         GFP_KERNEL);
3950         if (!FDEV(devi).blkz_seq)
3951                 return -ENOMEM;
3952
3953         rep_zone_arg.sbi = sbi;
3954         rep_zone_arg.dev = &FDEV(devi);
3955
3956         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3957                                   &rep_zone_arg);
3958         if (ret < 0)
3959                 return ret;
3960         return 0;
3961 }
3962 #endif
3963
3964 /*
3965  * Read f2fs raw super block.
3966  * Because we have two copies of super block, so read both of them
3967  * to get the first valid one. If any one of them is broken, we pass
3968  * them recovery flag back to the caller.
3969  */
3970 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3971                         struct f2fs_super_block **raw_super,
3972                         int *valid_super_block, int *recovery)
3973 {
3974         struct super_block *sb = sbi->sb;
3975         int block;
3976         struct buffer_head *bh;
3977         struct f2fs_super_block *super;
3978         int err = 0;
3979
3980         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3981         if (!super)
3982                 return -ENOMEM;
3983
3984         for (block = 0; block < 2; block++) {
3985                 bh = sb_bread(sb, block);
3986                 if (!bh) {
3987                         f2fs_err(sbi, "Unable to read %dth superblock",
3988                                  block + 1);
3989                         err = -EIO;
3990                         *recovery = 1;
3991                         continue;
3992                 }
3993
3994                 /* sanity checking of raw super */
3995                 err = sanity_check_raw_super(sbi, bh);
3996                 if (err) {
3997                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3998                                  block + 1);
3999                         brelse(bh);
4000                         *recovery = 1;
4001                         continue;
4002                 }
4003
4004                 if (!*raw_super) {
4005                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
4006                                                         sizeof(*super));
4007                         *valid_super_block = block;
4008                         *raw_super = super;
4009                 }
4010                 brelse(bh);
4011         }
4012
4013         /* No valid superblock */
4014         if (!*raw_super)
4015                 kfree(super);
4016         else
4017                 err = 0;
4018
4019         return err;
4020 }
4021
4022 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
4023 {
4024         struct buffer_head *bh;
4025         __u32 crc = 0;
4026         int err;
4027
4028         if ((recover && f2fs_readonly(sbi->sb)) ||
4029                                 f2fs_hw_is_readonly(sbi)) {
4030                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
4031                 return -EROFS;
4032         }
4033
4034         /* we should update superblock crc here */
4035         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
4036                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
4037                                 offsetof(struct f2fs_super_block, crc));
4038                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
4039         }
4040
4041         /* write back-up superblock first */
4042         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
4043         if (!bh)
4044                 return -EIO;
4045         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
4046         brelse(bh);
4047
4048         /* if we are in recovery path, skip writing valid superblock */
4049         if (recover || err)
4050                 return err;
4051
4052         /* write current valid superblock */
4053         bh = sb_bread(sbi->sb, sbi->valid_super_block);
4054         if (!bh)
4055                 return -EIO;
4056         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
4057         brelse(bh);
4058         return err;
4059 }
4060
4061 static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
4062 {
4063         unsigned long flags;
4064
4065         spin_lock_irqsave(&sbi->error_lock, flags);
4066         if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
4067                 sbi->stop_reason[reason]++;
4068         spin_unlock_irqrestore(&sbi->error_lock, flags);
4069 }
4070
4071 static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
4072 {
4073         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4074         unsigned long flags;
4075         int err;
4076
4077         f2fs_down_write(&sbi->sb_lock);
4078
4079         spin_lock_irqsave(&sbi->error_lock, flags);
4080         if (sbi->error_dirty) {
4081                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4082                                                         MAX_F2FS_ERRORS);
4083                 sbi->error_dirty = false;
4084         }
4085         memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
4086         spin_unlock_irqrestore(&sbi->error_lock, flags);
4087
4088         err = f2fs_commit_super(sbi, false);
4089
4090         f2fs_up_write(&sbi->sb_lock);
4091         if (err)
4092                 f2fs_err(sbi, "f2fs_commit_super fails to record err:%d", err);
4093 }
4094
4095 void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
4096 {
4097         unsigned long flags;
4098
4099         spin_lock_irqsave(&sbi->error_lock, flags);
4100         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
4101                 set_bit(flag, (unsigned long *)sbi->errors);
4102                 sbi->error_dirty = true;
4103         }
4104         spin_unlock_irqrestore(&sbi->error_lock, flags);
4105 }
4106
4107 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
4108 {
4109         unsigned long flags;
4110         bool need_update = false;
4111
4112         spin_lock_irqsave(&sbi->error_lock, flags);
4113         if (sbi->error_dirty) {
4114                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4115                                                         MAX_F2FS_ERRORS);
4116                 sbi->error_dirty = false;
4117                 need_update = true;
4118         }
4119         spin_unlock_irqrestore(&sbi->error_lock, flags);
4120
4121         return need_update;
4122 }
4123
4124 static void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error)
4125 {
4126         int err;
4127
4128         f2fs_down_write(&sbi->sb_lock);
4129
4130         if (!f2fs_update_errors(sbi))
4131                 goto out_unlock;
4132
4133         err = f2fs_commit_super(sbi, false);
4134         if (err)
4135                 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d",
4136                                                                 error, err);
4137 out_unlock:
4138         f2fs_up_write(&sbi->sb_lock);
4139 }
4140
4141 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
4142 {
4143         f2fs_save_errors(sbi, error);
4144         f2fs_record_errors(sbi, error);
4145 }
4146
4147 void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error)
4148 {
4149         f2fs_save_errors(sbi, error);
4150
4151         if (!sbi->error_dirty)
4152                 return;
4153         if (!test_bit(error, (unsigned long *)sbi->errors))
4154                 return;
4155         schedule_work(&sbi->s_error_work);
4156 }
4157
4158 static bool system_going_down(void)
4159 {
4160         return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
4161                 || system_state == SYSTEM_RESTART;
4162 }
4163
4164 void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
4165                                                         bool irq_context)
4166 {
4167         struct super_block *sb = sbi->sb;
4168         bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
4169         bool continue_fs = !shutdown &&
4170                         F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
4171
4172         set_ckpt_flags(sbi, CP_ERROR_FLAG);
4173
4174         if (!f2fs_hw_is_readonly(sbi)) {
4175                 save_stop_reason(sbi, reason);
4176
4177                 if (irq_context && !shutdown)
4178                         schedule_work(&sbi->s_error_work);
4179                 else
4180                         f2fs_record_stop_reason(sbi);
4181         }
4182
4183         /*
4184          * We force ERRORS_RO behavior when system is rebooting. Otherwise we
4185          * could panic during 'reboot -f' as the underlying device got already
4186          * disabled.
4187          */
4188         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
4189                                 !shutdown && !system_going_down() &&
4190                                 !is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN))
4191                 panic("F2FS-fs (device %s): panic forced after error\n",
4192                                                         sb->s_id);
4193
4194         if (shutdown)
4195                 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
4196
4197         /* continue filesystem operators if errors=continue */
4198         if (continue_fs || f2fs_readonly(sb))
4199                 return;
4200
4201         f2fs_warn(sbi, "Remounting filesystem read-only");
4202         /*
4203          * Make sure updated value of ->s_mount_flags will be visible before
4204          * ->s_flags update
4205          */
4206         smp_wmb();
4207         sb->s_flags |= SB_RDONLY;
4208 }
4209
4210 static void f2fs_record_error_work(struct work_struct *work)
4211 {
4212         struct f2fs_sb_info *sbi = container_of(work,
4213                                         struct f2fs_sb_info, s_error_work);
4214
4215         f2fs_record_stop_reason(sbi);
4216 }
4217
4218 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
4219 {
4220         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4221         unsigned int max_devices = MAX_DEVICES;
4222         unsigned int logical_blksize;
4223         blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
4224         int i;
4225
4226         /* Initialize single device information */
4227         if (!RDEV(0).path[0]) {
4228                 if (!bdev_is_zoned(sbi->sb->s_bdev))
4229                         return 0;
4230                 max_devices = 1;
4231         }
4232
4233         /*
4234          * Initialize multiple devices information, or single
4235          * zoned block device information.
4236          */
4237         sbi->devs = f2fs_kzalloc(sbi,
4238                                  array_size(max_devices,
4239                                             sizeof(struct f2fs_dev_info)),
4240                                  GFP_KERNEL);
4241         if (!sbi->devs)
4242                 return -ENOMEM;
4243
4244         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
4245         sbi->aligned_blksize = true;
4246
4247         for (i = 0; i < max_devices; i++) {
4248                 if (i == 0)
4249                         FDEV(0).bdev_handle = sbi->sb->s_bdev_handle;
4250                 else if (!RDEV(i).path[0])
4251                         break;
4252
4253                 if (max_devices > 1) {
4254                         /* Multi-device mount */
4255                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
4256                         FDEV(i).total_segments =
4257                                 le32_to_cpu(RDEV(i).total_segments);
4258                         if (i == 0) {
4259                                 FDEV(i).start_blk = 0;
4260                                 FDEV(i).end_blk = FDEV(i).start_blk +
4261                                     (FDEV(i).total_segments <<
4262                                     sbi->log_blocks_per_seg) - 1 +
4263                                     le32_to_cpu(raw_super->segment0_blkaddr);
4264                         } else {
4265                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
4266                                 FDEV(i).end_blk = FDEV(i).start_blk +
4267                                         (FDEV(i).total_segments <<
4268                                         sbi->log_blocks_per_seg) - 1;
4269                                 FDEV(i).bdev_handle = bdev_open_by_path(
4270                                         FDEV(i).path, mode, sbi->sb, NULL);
4271                         }
4272                 }
4273                 if (IS_ERR(FDEV(i).bdev_handle))
4274                         return PTR_ERR(FDEV(i).bdev_handle);
4275
4276                 FDEV(i).bdev = FDEV(i).bdev_handle->bdev;
4277                 /* to release errored devices */
4278                 sbi->s_ndevs = i + 1;
4279
4280                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4281                         sbi->aligned_blksize = false;
4282
4283 #ifdef CONFIG_BLK_DEV_ZONED
4284                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
4285                                 !f2fs_sb_has_blkzoned(sbi)) {
4286                         f2fs_err(sbi, "Zoned block device feature not enabled");
4287                         return -EINVAL;
4288                 }
4289                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
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: %s)",
4297                                   i, FDEV(i).path,
4298                                   FDEV(i).total_segments,
4299                                   FDEV(i).start_blk, FDEV(i).end_blk,
4300                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
4301                                   "Host-aware" : "Host-managed");
4302                         continue;
4303                 }
4304 #endif
4305                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4306                           i, FDEV(i).path,
4307                           FDEV(i).total_segments,
4308                           FDEV(i).start_blk, FDEV(i).end_blk);
4309         }
4310         f2fs_info(sbi,
4311                   "IO Block Size: %8ld KB", F2FS_IO_SIZE_KB(sbi));
4312         return 0;
4313 }
4314
4315 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4316 {
4317 #if IS_ENABLED(CONFIG_UNICODE)
4318         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4319                 const struct f2fs_sb_encodings *encoding_info;
4320                 struct unicode_map *encoding;
4321                 __u16 encoding_flags;
4322
4323                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4324                 if (!encoding_info) {
4325                         f2fs_err(sbi,
4326                                  "Encoding requested by superblock is unknown");
4327                         return -EINVAL;
4328                 }
4329
4330                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4331                 encoding = utf8_load(encoding_info->version);
4332                 if (IS_ERR(encoding)) {
4333                         f2fs_err(sbi,
4334                                  "can't mount with superblock charset: %s-%u.%u.%u "
4335                                  "not supported by the kernel. flags: 0x%x.",
4336                                  encoding_info->name,
4337                                  unicode_major(encoding_info->version),
4338                                  unicode_minor(encoding_info->version),
4339                                  unicode_rev(encoding_info->version),
4340                                  encoding_flags);
4341                         return PTR_ERR(encoding);
4342                 }
4343                 f2fs_info(sbi, "Using encoding defined by superblock: "
4344                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4345                          unicode_major(encoding_info->version),
4346                          unicode_minor(encoding_info->version),
4347                          unicode_rev(encoding_info->version),
4348                          encoding_flags);
4349
4350                 sbi->sb->s_encoding = encoding;
4351                 sbi->sb->s_encoding_flags = encoding_flags;
4352         }
4353 #else
4354         if (f2fs_sb_has_casefold(sbi)) {
4355                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4356                 return -EINVAL;
4357         }
4358 #endif
4359         return 0;
4360 }
4361
4362 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4363 {
4364         /* adjust parameters according to the volume size */
4365         if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4366                 if (f2fs_block_unit_discard(sbi))
4367                         SM_I(sbi)->dcc_info->discard_granularity =
4368                                                 MIN_DISCARD_GRANULARITY;
4369                 if (!f2fs_lfs_mode(sbi))
4370                         SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4371                                                 BIT(F2FS_IPU_HONOR_OPU_WRITE);
4372         }
4373
4374         sbi->readdir_ra = true;
4375 }
4376
4377 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4378 {
4379         struct f2fs_sb_info *sbi;
4380         struct f2fs_super_block *raw_super;
4381         struct inode *root;
4382         int err;
4383         bool skip_recovery = false, need_fsck = false;
4384         char *options = NULL;
4385         int recovery, i, valid_super_block;
4386         struct curseg_info *seg_i;
4387         int retry_cnt = 1;
4388 #ifdef CONFIG_QUOTA
4389         bool quota_enabled = false;
4390 #endif
4391
4392 try_onemore:
4393         err = -EINVAL;
4394         raw_super = NULL;
4395         valid_super_block = -1;
4396         recovery = 0;
4397
4398         /* allocate memory for f2fs-specific super block info */
4399         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4400         if (!sbi)
4401                 return -ENOMEM;
4402
4403         sbi->sb = sb;
4404
4405         /* initialize locks within allocated memory */
4406         init_f2fs_rwsem(&sbi->gc_lock);
4407         mutex_init(&sbi->writepages);
4408         init_f2fs_rwsem(&sbi->cp_global_sem);
4409         init_f2fs_rwsem(&sbi->node_write);
4410         init_f2fs_rwsem(&sbi->node_change);
4411         spin_lock_init(&sbi->stat_lock);
4412         init_f2fs_rwsem(&sbi->cp_rwsem);
4413         init_f2fs_rwsem(&sbi->quota_sem);
4414         init_waitqueue_head(&sbi->cp_wait);
4415         spin_lock_init(&sbi->error_lock);
4416
4417         for (i = 0; i < NR_INODE_TYPE; i++) {
4418                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4419                 spin_lock_init(&sbi->inode_lock[i]);
4420         }
4421         mutex_init(&sbi->flush_lock);
4422
4423         /* Load the checksum driver */
4424         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4425         if (IS_ERR(sbi->s_chksum_driver)) {
4426                 f2fs_err(sbi, "Cannot load crc32 driver.");
4427                 err = PTR_ERR(sbi->s_chksum_driver);
4428                 sbi->s_chksum_driver = NULL;
4429                 goto free_sbi;
4430         }
4431
4432         /* set a block size */
4433         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4434                 f2fs_err(sbi, "unable to set blocksize");
4435                 goto free_sbi;
4436         }
4437
4438         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4439                                                                 &recovery);
4440         if (err)
4441                 goto free_sbi;
4442
4443         sb->s_fs_info = sbi;
4444         sbi->raw_super = raw_super;
4445
4446         INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
4447         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4448         memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
4449
4450         /* precompute checksum seed for metadata */
4451         if (f2fs_sb_has_inode_chksum(sbi))
4452                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4453                                                 sizeof(raw_super->uuid));
4454
4455         default_options(sbi, false);
4456         /* parse mount options */
4457         options = kstrdup((const char *)data, GFP_KERNEL);
4458         if (data && !options) {
4459                 err = -ENOMEM;
4460                 goto free_sb_buf;
4461         }
4462
4463         err = parse_options(sb, options, false);
4464         if (err)
4465                 goto free_options;
4466
4467         sb->s_maxbytes = max_file_blocks(NULL) <<
4468                                 le32_to_cpu(raw_super->log_blocksize);
4469         sb->s_max_links = F2FS_LINK_MAX;
4470
4471         err = f2fs_setup_casefold(sbi);
4472         if (err)
4473                 goto free_options;
4474
4475 #ifdef CONFIG_QUOTA
4476         sb->dq_op = &f2fs_quota_operations;
4477         sb->s_qcop = &f2fs_quotactl_ops;
4478         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4479
4480         if (f2fs_sb_has_quota_ino(sbi)) {
4481                 for (i = 0; i < MAXQUOTAS; i++) {
4482                         if (f2fs_qf_ino(sbi->sb, i))
4483                                 sbi->nquota_files++;
4484                 }
4485         }
4486 #endif
4487
4488         sb->s_op = &f2fs_sops;
4489 #ifdef CONFIG_FS_ENCRYPTION
4490         sb->s_cop = &f2fs_cryptops;
4491 #endif
4492 #ifdef CONFIG_FS_VERITY
4493         sb->s_vop = &f2fs_verityops;
4494 #endif
4495         sb->s_xattr = f2fs_xattr_handlers;
4496         sb->s_export_op = &f2fs_export_ops;
4497         sb->s_magic = F2FS_SUPER_MAGIC;
4498         sb->s_time_gran = 1;
4499         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4500                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4501         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4502         sb->s_iflags |= SB_I_CGROUPWB;
4503
4504         /* init f2fs-specific super block info */
4505         sbi->valid_super_block = valid_super_block;
4506
4507         /* disallow all the data/node/meta page writes */
4508         set_sbi_flag(sbi, SBI_POR_DOING);
4509
4510         err = f2fs_init_write_merge_io(sbi);
4511         if (err)
4512                 goto free_bio_info;
4513
4514         init_sb_info(sbi);
4515
4516         err = f2fs_init_iostat(sbi);
4517         if (err)
4518                 goto free_bio_info;
4519
4520         err = init_percpu_info(sbi);
4521         if (err)
4522                 goto free_iostat;
4523
4524         if (F2FS_IO_ALIGNED(sbi)) {
4525                 sbi->write_io_dummy =
4526                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4527                 if (!sbi->write_io_dummy) {
4528                         err = -ENOMEM;
4529                         goto free_percpu;
4530                 }
4531         }
4532
4533         /* init per sbi slab cache */
4534         err = f2fs_init_xattr_caches(sbi);
4535         if (err)
4536                 goto free_io_dummy;
4537         err = f2fs_init_page_array_cache(sbi);
4538         if (err)
4539                 goto free_xattr_cache;
4540
4541         /* get an inode for meta space */
4542         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4543         if (IS_ERR(sbi->meta_inode)) {
4544                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4545                 err = PTR_ERR(sbi->meta_inode);
4546                 goto free_page_array_cache;
4547         }
4548
4549         err = f2fs_get_valid_checkpoint(sbi);
4550         if (err) {
4551                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4552                 goto free_meta_inode;
4553         }
4554
4555         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4556                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4557         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4558                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4559                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4560         }
4561
4562         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4563                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4564
4565         /* Initialize device list */
4566         err = f2fs_scan_devices(sbi);
4567         if (err) {
4568                 f2fs_err(sbi, "Failed to find devices");
4569                 goto free_devices;
4570         }
4571
4572         err = f2fs_init_post_read_wq(sbi);
4573         if (err) {
4574                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4575                 goto free_devices;
4576         }
4577
4578         sbi->total_valid_node_count =
4579                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4580         percpu_counter_set(&sbi->total_valid_inode_count,
4581                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4582         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4583         sbi->total_valid_block_count =
4584                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4585         sbi->last_valid_block_count = sbi->total_valid_block_count;
4586         sbi->reserved_blocks = 0;
4587         sbi->current_reserved_blocks = 0;
4588         limit_reserve_root(sbi);
4589         adjust_unusable_cap_perc(sbi);
4590
4591         f2fs_init_extent_cache_info(sbi);
4592
4593         f2fs_init_ino_entry_info(sbi);
4594
4595         f2fs_init_fsync_node_info(sbi);
4596
4597         /* setup checkpoint request control and start checkpoint issue thread */
4598         f2fs_init_ckpt_req_control(sbi);
4599         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4600                         test_opt(sbi, MERGE_CHECKPOINT)) {
4601                 err = f2fs_start_ckpt_thread(sbi);
4602                 if (err) {
4603                         f2fs_err(sbi,
4604                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4605                             err);
4606                         goto stop_ckpt_thread;
4607                 }
4608         }
4609
4610         /* setup f2fs internal modules */
4611         err = f2fs_build_segment_manager(sbi);
4612         if (err) {
4613                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4614                          err);
4615                 goto free_sm;
4616         }
4617         err = f2fs_build_node_manager(sbi);
4618         if (err) {
4619                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4620                          err);
4621                 goto free_nm;
4622         }
4623
4624         err = adjust_reserved_segment(sbi);
4625         if (err)
4626                 goto free_nm;
4627
4628         /* For write statistics */
4629         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4630
4631         /* Read accumulated write IO statistics if exists */
4632         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4633         if (__exist_node_summaries(sbi))
4634                 sbi->kbytes_written =
4635                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4636
4637         f2fs_build_gc_manager(sbi);
4638
4639         err = f2fs_build_stats(sbi);
4640         if (err)
4641                 goto free_nm;
4642
4643         /* get an inode for node space */
4644         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4645         if (IS_ERR(sbi->node_inode)) {
4646                 f2fs_err(sbi, "Failed to read node inode");
4647                 err = PTR_ERR(sbi->node_inode);
4648                 goto free_stats;
4649         }
4650
4651         /* read root inode and dentry */
4652         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4653         if (IS_ERR(root)) {
4654                 f2fs_err(sbi, "Failed to read root inode");
4655                 err = PTR_ERR(root);
4656                 goto free_node_inode;
4657         }
4658         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4659                         !root->i_size || !root->i_nlink) {
4660                 iput(root);
4661                 err = -EINVAL;
4662                 goto free_node_inode;
4663         }
4664
4665         sb->s_root = d_make_root(root); /* allocate root dentry */
4666         if (!sb->s_root) {
4667                 err = -ENOMEM;
4668                 goto free_node_inode;
4669         }
4670
4671         err = f2fs_init_compress_inode(sbi);
4672         if (err)
4673                 goto free_root_inode;
4674
4675         err = f2fs_register_sysfs(sbi);
4676         if (err)
4677                 goto free_compress_inode;
4678
4679 #ifdef CONFIG_QUOTA
4680         /* Enable quota usage during mount */
4681         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4682                 err = f2fs_enable_quotas(sb);
4683                 if (err)
4684                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4685         }
4686
4687         quota_enabled = f2fs_recover_quota_begin(sbi);
4688 #endif
4689         /* if there are any orphan inodes, free them */
4690         err = f2fs_recover_orphan_inodes(sbi);
4691         if (err)
4692                 goto free_meta;
4693
4694         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4695                 goto reset_checkpoint;
4696
4697         /* recover fsynced data */
4698         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4699                         !test_opt(sbi, NORECOVERY)) {
4700                 /*
4701                  * mount should be failed, when device has readonly mode, and
4702                  * previous checkpoint was not done by clean system shutdown.
4703                  */
4704                 if (f2fs_hw_is_readonly(sbi)) {
4705                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4706                                 err = f2fs_recover_fsync_data(sbi, true);
4707                                 if (err > 0) {
4708                                         err = -EROFS;
4709                                         f2fs_err(sbi, "Need to recover fsync data, but "
4710                                                 "write access unavailable, please try "
4711                                                 "mount w/ disable_roll_forward or norecovery");
4712                                 }
4713                                 if (err < 0)
4714                                         goto free_meta;
4715                         }
4716                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4717                         goto reset_checkpoint;
4718                 }
4719
4720                 if (need_fsck)
4721                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4722
4723                 if (skip_recovery)
4724                         goto reset_checkpoint;
4725
4726                 err = f2fs_recover_fsync_data(sbi, false);
4727                 if (err < 0) {
4728                         if (err != -ENOMEM)
4729                                 skip_recovery = true;
4730                         need_fsck = true;
4731                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4732                                  err);
4733                         goto free_meta;
4734                 }
4735         } else {
4736                 err = f2fs_recover_fsync_data(sbi, true);
4737
4738                 if (!f2fs_readonly(sb) && err > 0) {
4739                         err = -EINVAL;
4740                         f2fs_err(sbi, "Need to recover fsync data");
4741                         goto free_meta;
4742                 }
4743         }
4744
4745 #ifdef CONFIG_QUOTA
4746         f2fs_recover_quota_end(sbi, quota_enabled);
4747 #endif
4748
4749         /*
4750          * If the f2fs is not readonly and fsync data recovery succeeds,
4751          * check zoned block devices' write pointer consistency.
4752          */
4753         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4754                 err = f2fs_check_write_pointer(sbi);
4755                 if (err)
4756                         goto free_meta;
4757         }
4758
4759 reset_checkpoint:
4760         f2fs_init_inmem_curseg(sbi);
4761
4762         /* f2fs_recover_fsync_data() cleared this already */
4763         clear_sbi_flag(sbi, SBI_POR_DOING);
4764
4765         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4766                 err = f2fs_disable_checkpoint(sbi);
4767                 if (err)
4768                         goto sync_free_meta;
4769         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4770                 f2fs_enable_checkpoint(sbi);
4771         }
4772
4773         /*
4774          * If filesystem is not mounted as read-only then
4775          * do start the gc_thread.
4776          */
4777         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4778                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4779                 /* After POR, we can run background GC thread.*/
4780                 err = f2fs_start_gc_thread(sbi);
4781                 if (err)
4782                         goto sync_free_meta;
4783         }
4784         kvfree(options);
4785
4786         /* recover broken superblock */
4787         if (recovery) {
4788                 err = f2fs_commit_super(sbi, true);
4789                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4790                           sbi->valid_super_block ? 1 : 2, err);
4791         }
4792
4793         f2fs_join_shrinker(sbi);
4794
4795         f2fs_tuning_parameters(sbi);
4796
4797         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4798                     cur_cp_version(F2FS_CKPT(sbi)));
4799         f2fs_update_time(sbi, CP_TIME);
4800         f2fs_update_time(sbi, REQ_TIME);
4801         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4802         return 0;
4803
4804 sync_free_meta:
4805         /* safe to flush all the data */
4806         sync_filesystem(sbi->sb);
4807         retry_cnt = 0;
4808
4809 free_meta:
4810 #ifdef CONFIG_QUOTA
4811         f2fs_truncate_quota_inode_pages(sb);
4812         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4813                 f2fs_quota_off_umount(sbi->sb);
4814 #endif
4815         /*
4816          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4817          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4818          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4819          * falls into an infinite loop in f2fs_sync_meta_pages().
4820          */
4821         truncate_inode_pages_final(META_MAPPING(sbi));
4822         /* evict some inodes being cached by GC */
4823         evict_inodes(sb);
4824         f2fs_unregister_sysfs(sbi);
4825 free_compress_inode:
4826         f2fs_destroy_compress_inode(sbi);
4827 free_root_inode:
4828         dput(sb->s_root);
4829         sb->s_root = NULL;
4830 free_node_inode:
4831         f2fs_release_ino_entry(sbi, true);
4832         truncate_inode_pages_final(NODE_MAPPING(sbi));
4833         iput(sbi->node_inode);
4834         sbi->node_inode = NULL;
4835 free_stats:
4836         f2fs_destroy_stats(sbi);
4837 free_nm:
4838         /* stop discard thread before destroying node manager */
4839         f2fs_stop_discard_thread(sbi);
4840         f2fs_destroy_node_manager(sbi);
4841 free_sm:
4842         f2fs_destroy_segment_manager(sbi);
4843 stop_ckpt_thread:
4844         f2fs_stop_ckpt_thread(sbi);
4845         /* flush s_error_work before sbi destroy */
4846         flush_work(&sbi->s_error_work);
4847         f2fs_destroy_post_read_wq(sbi);
4848 free_devices:
4849         destroy_device_list(sbi);
4850         kvfree(sbi->ckpt);
4851 free_meta_inode:
4852         make_bad_inode(sbi->meta_inode);
4853         iput(sbi->meta_inode);
4854         sbi->meta_inode = NULL;
4855 free_page_array_cache:
4856         f2fs_destroy_page_array_cache(sbi);
4857 free_xattr_cache:
4858         f2fs_destroy_xattr_caches(sbi);
4859 free_io_dummy:
4860         mempool_destroy(sbi->write_io_dummy);
4861 free_percpu:
4862         destroy_percpu_info(sbi);
4863 free_iostat:
4864         f2fs_destroy_iostat(sbi);
4865 free_bio_info:
4866         for (i = 0; i < NR_PAGE_TYPE; i++)
4867                 kvfree(sbi->write_io[i]);
4868
4869 #if IS_ENABLED(CONFIG_UNICODE)
4870         utf8_unload(sb->s_encoding);
4871         sb->s_encoding = NULL;
4872 #endif
4873 free_options:
4874 #ifdef CONFIG_QUOTA
4875         for (i = 0; i < MAXQUOTAS; i++)
4876                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4877 #endif
4878         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4879         kvfree(options);
4880 free_sb_buf:
4881         kfree(raw_super);
4882 free_sbi:
4883         if (sbi->s_chksum_driver)
4884                 crypto_free_shash(sbi->s_chksum_driver);
4885         kfree(sbi);
4886
4887         /* give only one another chance */
4888         if (retry_cnt > 0 && skip_recovery) {
4889                 retry_cnt--;
4890                 shrink_dcache_sb(sb);
4891                 goto try_onemore;
4892         }
4893         return err;
4894 }
4895
4896 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4897                         const char *dev_name, void *data)
4898 {
4899         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4900 }
4901
4902 static void kill_f2fs_super(struct super_block *sb)
4903 {
4904         if (sb->s_root) {
4905                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4906
4907                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4908                 f2fs_stop_gc_thread(sbi);
4909                 f2fs_stop_discard_thread(sbi);
4910
4911 #ifdef CONFIG_F2FS_FS_COMPRESSION
4912                 /*
4913                  * latter evict_inode() can bypass checking and invalidating
4914                  * compress inode cache.
4915                  */
4916                 if (test_opt(sbi, COMPRESS_CACHE))
4917                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4918 #endif
4919
4920                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4921                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4922                         struct cp_control cpc = {
4923                                 .reason = CP_UMOUNT,
4924                         };
4925                         stat_inc_cp_call_count(sbi, TOTAL_CALL);
4926                         f2fs_write_checkpoint(sbi, &cpc);
4927                 }
4928
4929                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4930                         sb->s_flags &= ~SB_RDONLY;
4931         }
4932         kill_block_super(sb);
4933 }
4934
4935 static struct file_system_type f2fs_fs_type = {
4936         .owner          = THIS_MODULE,
4937         .name           = "f2fs",
4938         .mount          = f2fs_mount,
4939         .kill_sb        = kill_f2fs_super,
4940         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4941 };
4942 MODULE_ALIAS_FS("f2fs");
4943
4944 static int __init init_inodecache(void)
4945 {
4946         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4947                         sizeof(struct f2fs_inode_info), 0,
4948                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4949         return f2fs_inode_cachep ? 0 : -ENOMEM;
4950 }
4951
4952 static void destroy_inodecache(void)
4953 {
4954         /*
4955          * Make sure all delayed rcu free inodes are flushed before we
4956          * destroy cache.
4957          */
4958         rcu_barrier();
4959         kmem_cache_destroy(f2fs_inode_cachep);
4960 }
4961
4962 static int __init init_f2fs_fs(void)
4963 {
4964         int err;
4965
4966         if (PAGE_SIZE != F2FS_BLKSIZE) {
4967                 printk("F2FS not supported on PAGE_SIZE(%lu) != BLOCK_SIZE(%lu)\n",
4968                                 PAGE_SIZE, F2FS_BLKSIZE);
4969                 return -EINVAL;
4970         }
4971
4972         err = init_inodecache();
4973         if (err)
4974                 goto fail;
4975         err = f2fs_create_node_manager_caches();
4976         if (err)
4977                 goto free_inodecache;
4978         err = f2fs_create_segment_manager_caches();
4979         if (err)
4980                 goto free_node_manager_caches;
4981         err = f2fs_create_checkpoint_caches();
4982         if (err)
4983                 goto free_segment_manager_caches;
4984         err = f2fs_create_recovery_cache();
4985         if (err)
4986                 goto free_checkpoint_caches;
4987         err = f2fs_create_extent_cache();
4988         if (err)
4989                 goto free_recovery_cache;
4990         err = f2fs_create_garbage_collection_cache();
4991         if (err)
4992                 goto free_extent_cache;
4993         err = f2fs_init_sysfs();
4994         if (err)
4995                 goto free_garbage_collection_cache;
4996         err = f2fs_init_shrinker();
4997         if (err)
4998                 goto free_sysfs;
4999         err = register_filesystem(&f2fs_fs_type);
5000         if (err)
5001                 goto free_shrinker;
5002         f2fs_create_root_stats();
5003         err = f2fs_init_post_read_processing();
5004         if (err)
5005                 goto free_root_stats;
5006         err = f2fs_init_iostat_processing();
5007         if (err)
5008                 goto free_post_read;
5009         err = f2fs_init_bio_entry_cache();
5010         if (err)
5011                 goto free_iostat;
5012         err = f2fs_init_bioset();
5013         if (err)
5014                 goto free_bio_entry_cache;
5015         err = f2fs_init_compress_mempool();
5016         if (err)
5017                 goto free_bioset;
5018         err = f2fs_init_compress_cache();
5019         if (err)
5020                 goto free_compress_mempool;
5021         err = f2fs_create_casefold_cache();
5022         if (err)
5023                 goto free_compress_cache;
5024         return 0;
5025 free_compress_cache:
5026         f2fs_destroy_compress_cache();
5027 free_compress_mempool:
5028         f2fs_destroy_compress_mempool();
5029 free_bioset:
5030         f2fs_destroy_bioset();
5031 free_bio_entry_cache:
5032         f2fs_destroy_bio_entry_cache();
5033 free_iostat:
5034         f2fs_destroy_iostat_processing();
5035 free_post_read:
5036         f2fs_destroy_post_read_processing();
5037 free_root_stats:
5038         f2fs_destroy_root_stats();
5039         unregister_filesystem(&f2fs_fs_type);
5040 free_shrinker:
5041         f2fs_exit_shrinker();
5042 free_sysfs:
5043         f2fs_exit_sysfs();
5044 free_garbage_collection_cache:
5045         f2fs_destroy_garbage_collection_cache();
5046 free_extent_cache:
5047         f2fs_destroy_extent_cache();
5048 free_recovery_cache:
5049         f2fs_destroy_recovery_cache();
5050 free_checkpoint_caches:
5051         f2fs_destroy_checkpoint_caches();
5052 free_segment_manager_caches:
5053         f2fs_destroy_segment_manager_caches();
5054 free_node_manager_caches:
5055         f2fs_destroy_node_manager_caches();
5056 free_inodecache:
5057         destroy_inodecache();
5058 fail:
5059         return err;
5060 }
5061
5062 static void __exit exit_f2fs_fs(void)
5063 {
5064         f2fs_destroy_casefold_cache();
5065         f2fs_destroy_compress_cache();
5066         f2fs_destroy_compress_mempool();
5067         f2fs_destroy_bioset();
5068         f2fs_destroy_bio_entry_cache();
5069         f2fs_destroy_iostat_processing();
5070         f2fs_destroy_post_read_processing();
5071         f2fs_destroy_root_stats();
5072         unregister_filesystem(&f2fs_fs_type);
5073         f2fs_exit_shrinker();
5074         f2fs_exit_sysfs();
5075         f2fs_destroy_garbage_collection_cache();
5076         f2fs_destroy_extent_cache();
5077         f2fs_destroy_recovery_cache();
5078         f2fs_destroy_checkpoint_caches();
5079         f2fs_destroy_segment_manager_caches();
5080         f2fs_destroy_node_manager_caches();
5081         destroy_inodecache();
5082 }
5083
5084 module_init(init_f2fs_fs)
5085 module_exit(exit_f2fs_fs)
5086
5087 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
5088 MODULE_DESCRIPTION("Flash Friendly File System");
5089 MODULE_LICENSE("GPL");
5090 MODULE_SOFTDEP("pre: crc32");
5091