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