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 };
  65
  66 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  67                                                         unsigned int type)
  68 {
  69         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  70
  71         if (rate) {
  72                 atomic_set(&ffi->inject_ops, 0);
  73                 ffi->inject_rate = rate;
  74         }
  75
  76         if (type)
  77                 ffi->inject_type = type;
  78
  79         if (!rate && !type)
  80                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  81 }
  82 #endif
  83
  84 /* f2fs-wide shrinker description */
  85 static struct shrinker f2fs_shrinker_info = {
  86         .scan_objects = f2fs_shrink_scan,
  87         .count_objects = f2fs_shrink_count,
  88         .seeks = DEFAULT_SEEKS,
  89 };
  90
  91 enum {
  92         Opt_gc_background,
  93         Opt_disable_roll_forward,
  94         Opt_norecovery,
  95         Opt_discard,
  96         Opt_nodiscard,
  97         Opt_noheap,
  98         Opt_heap,
  99         Opt_user_xattr,
 100         Opt_nouser_xattr,
 101         Opt_acl,
 102         Opt_noacl,
 103         Opt_active_logs,
 104         Opt_disable_ext_identify,
 105         Opt_inline_xattr,
 106         Opt_noinline_xattr,
 107         Opt_inline_xattr_size,
 108         Opt_inline_data,
 109         Opt_inline_dentry,
 110         Opt_noinline_dentry,
 111         Opt_flush_merge,
 112         Opt_noflush_merge,
 113         Opt_nobarrier,
 114         Opt_fastboot,
 115         Opt_extent_cache,
 116         Opt_noextent_cache,
 117         Opt_noinline_data,
 118         Opt_data_flush,
 119         Opt_reserve_root,
 120         Opt_resgid,
 121         Opt_resuid,
 122         Opt_mode,
 123         Opt_io_size_bits,
 124         Opt_fault_injection,
 125         Opt_fault_type,
 126         Opt_lazytime,
 127         Opt_nolazytime,
 128         Opt_quota,
 129         Opt_noquota,
 130         Opt_usrquota,
 131         Opt_grpquota,
 132         Opt_prjquota,
 133         Opt_usrjquota,
 134         Opt_grpjquota,
 135         Opt_prjjquota,
 136         Opt_offusrjquota,
 137         Opt_offgrpjquota,
 138         Opt_offprjjquota,
 139         Opt_jqfmt_vfsold,
 140         Opt_jqfmt_vfsv0,
 141         Opt_jqfmt_vfsv1,
 142         Opt_alloc,
 143         Opt_fsync,
 144         Opt_test_dummy_encryption,
 145         Opt_inlinecrypt,
 146         Opt_checkpoint_disable,
 147         Opt_checkpoint_disable_cap,
 148         Opt_checkpoint_disable_cap_perc,
 149         Opt_checkpoint_enable,
 150         Opt_checkpoint_merge,
 151         Opt_nocheckpoint_merge,
 152         Opt_compress_algorithm,
 153         Opt_compress_log_size,
 154         Opt_compress_extension,
 155         Opt_nocompress_extension,
 156         Opt_compress_chksum,
 157         Opt_compress_mode,
 158         Opt_compress_cache,
 159         Opt_atgc,
 160         Opt_gc_merge,
 161         Opt_nogc_merge,
 162         Opt_discard_unit,
 163         Opt_memory_mode,
 164         Opt_err,
 165 };
 166
 167 static match_table_t f2fs_tokens = {
 168         {Opt_gc_background, "background_gc=%s"},
 169         {Opt_disable_roll_forward, "disable_roll_forward"},
 170         {Opt_norecovery, "norecovery"},
 171         {Opt_discard, "discard"},
 172         {Opt_nodiscard, "nodiscard"},
 173         {Opt_noheap, "no_heap"},
 174         {Opt_heap, "heap"},
 175         {Opt_user_xattr, "user_xattr"},
 176         {Opt_nouser_xattr, "nouser_xattr"},
 177         {Opt_acl, "acl"},
 178         {Opt_noacl, "noacl"},
 179         {Opt_active_logs, "active_logs=%u"},
 180         {Opt_disable_ext_identify, "disable_ext_identify"},
 181         {Opt_inline_xattr, "inline_xattr"},
 182         {Opt_noinline_xattr, "noinline_xattr"},
 183         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 184         {Opt_inline_data, "inline_data"},
 185         {Opt_inline_dentry, "inline_dentry"},
 186         {Opt_noinline_dentry, "noinline_dentry"},
 187         {Opt_flush_merge, "flush_merge"},
 188         {Opt_noflush_merge, "noflush_merge"},
 189         {Opt_nobarrier, "nobarrier"},
 190         {Opt_fastboot, "fastboot"},
 191         {Opt_extent_cache, "extent_cache"},
 192         {Opt_noextent_cache, "noextent_cache"},
 193         {Opt_noinline_data, "noinline_data"},
 194         {Opt_data_flush, "data_flush"},
 195         {Opt_reserve_root, "reserve_root=%u"},
 196         {Opt_resgid, "resgid=%u"},
 197         {Opt_resuid, "resuid=%u"},
 198         {Opt_mode, "mode=%s"},
 199         {Opt_io_size_bits, "io_bits=%u"},
 200         {Opt_fault_injection, "fault_injection=%u"},
 201         {Opt_fault_type, "fault_type=%u"},
 202         {Opt_lazytime, "lazytime"},
 203         {Opt_nolazytime, "nolazytime"},
 204         {Opt_quota, "quota"},
 205         {Opt_noquota, "noquota"},
 206         {Opt_usrquota, "usrquota"},
 207         {Opt_grpquota, "grpquota"},
 208         {Opt_prjquota, "prjquota"},
 209         {Opt_usrjquota, "usrjquota=%s"},
 210         {Opt_grpjquota, "grpjquota=%s"},
 211         {Opt_prjjquota, "prjjquota=%s"},
 212         {Opt_offusrjquota, "usrjquota="},
 213         {Opt_offgrpjquota, "grpjquota="},
 214         {Opt_offprjjquota, "prjjquota="},
 215         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 216         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 217         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 218         {Opt_alloc, "alloc_mode=%s"},
 219         {Opt_fsync, "fsync_mode=%s"},
 220         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 221         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 222         {Opt_inlinecrypt, "inlinecrypt"},
 223         {Opt_checkpoint_disable, "checkpoint=disable"},
 224         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 225         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 226         {Opt_checkpoint_enable, "checkpoint=enable"},
 227         {Opt_checkpoint_merge, "checkpoint_merge"},
 228         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 229         {Opt_compress_algorithm, "compress_algorithm=%s"},
 230         {Opt_compress_log_size, "compress_log_size=%u"},
 231         {Opt_compress_extension, "compress_extension=%s"},
 232         {Opt_nocompress_extension, "nocompress_extension=%s"},
 233         {Opt_compress_chksum, "compress_chksum"},
 234         {Opt_compress_mode, "compress_mode=%s"},
 235         {Opt_compress_cache, "compress_cache"},
 236         {Opt_atgc, "atgc"},
 237         {Opt_gc_merge, "gc_merge"},
 238         {Opt_nogc_merge, "nogc_merge"},
 239         {Opt_discard_unit, "discard_unit=%s"},
 240         {Opt_memory_mode, "memory=%s"},
 241         {Opt_err, NULL},
 242 };
 243
 244 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 245 {
 246         struct va_format vaf;
 247         va_list args;
 248         int level;
 249
 250         va_start(args, fmt);
 251
 252         level = printk_get_level(fmt);
 253         vaf.fmt = printk_skip_level(fmt);
 254         vaf.va = &args;
 255         printk("%c%cF2FS-fs (%s): %pV\n",
 256                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 257
 258         va_end(args);
 259 }
 260
 261 #if IS_ENABLED(CONFIG_UNICODE)
 262 static const struct f2fs_sb_encodings {
 263         __u16 magic;
 264         char *name;
 265         unsigned int version;
 266 } f2fs_sb_encoding_map[] = {
 267         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 268 };
 269
 270 static const struct f2fs_sb_encodings *
 271 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 272 {
 273         __u16 magic = le16_to_cpu(sb->s_encoding);
 274         int i;
 275
 276         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 277                 if (magic == f2fs_sb_encoding_map[i].magic)
 278                         return &f2fs_sb_encoding_map[i];
 279
 280         return NULL;
 281 }
 282
 283 struct kmem_cache *f2fs_cf_name_slab;
 284 static int __init f2fs_create_casefold_cache(void)
 285 {
 286         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 287                                                         F2FS_NAME_LEN);
 288         if (!f2fs_cf_name_slab)
 289                 return -ENOMEM;
 290         return 0;
 291 }
 292
 293 static void f2fs_destroy_casefold_cache(void)
 294 {
 295         kmem_cache_destroy(f2fs_cf_name_slab);
 296 }
 297 #else
 298 static int __init f2fs_create_casefold_cache(void) { return 0; }
 299 static void f2fs_destroy_casefold_cache(void) { }
 300 #endif
 301
 302 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 303 {
 304         block_t limit = min((sbi->user_block_count << 1) / 1000,
 305                         sbi->user_block_count - sbi->reserved_blocks);
 306
 307         /* limit is 0.2% */
 308         if (test_opt(sbi, RESERVE_ROOT) &&
 309                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 310                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 311                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 312                           F2FS_OPTION(sbi).root_reserved_blocks);
 313         }
 314         if (!test_opt(sbi, RESERVE_ROOT) &&
 315                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 316                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 317                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 318                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 319                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 320                           from_kuid_munged(&init_user_ns,
 321                                            F2FS_OPTION(sbi).s_resuid),
 322                           from_kgid_munged(&init_user_ns,
 323                                            F2FS_OPTION(sbi).s_resgid));
 324 }
 325
 326 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 327 {
 328         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 329         unsigned int avg_vblocks;
 330         unsigned int wanted_reserved_segments;
 331         block_t avail_user_block_count;
 332
 333         if (!F2FS_IO_ALIGNED(sbi))
 334                 return 0;
 335
 336         /* average valid block count in section in worst case */
 337         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 338
 339         /*
 340          * we need enough free space when migrating one section in worst case
 341          */
 342         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 343                                                 reserved_segments(sbi);
 344         wanted_reserved_segments -= reserved_segments(sbi);
 345
 346         avail_user_block_count = sbi->user_block_count -
 347                                 sbi->current_reserved_blocks -
 348                                 F2FS_OPTION(sbi).root_reserved_blocks;
 349
 350         if (wanted_reserved_segments * sbi->blocks_per_seg >
 351                                         avail_user_block_count) {
 352                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 353                         wanted_reserved_segments,
 354                         avail_user_block_count >> sbi->log_blocks_per_seg);
 355                 return -ENOSPC;
 356         }
 357
 358         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 359
 360         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 361                          wanted_reserved_segments);
 362
 363         return 0;
 364 }
 365
 366 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 367 {
 368         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 369                 return;
 370
 371         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 372                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 373         else
 374                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 375                                         F2FS_OPTION(sbi).unusable_cap_perc;
 376
 377         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 378                         F2FS_OPTION(sbi).unusable_cap,
 379                         F2FS_OPTION(sbi).unusable_cap_perc);
 380 }
 381
 382 static void init_once(void *foo)
 383 {
 384         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 385
 386         inode_init_once(&fi->vfs_inode);
 387 }
 388
 389 #ifdef CONFIG_QUOTA
 390 static const char * const quotatypes[] = INITQFNAMES;
 391 #define QTYPE2NAME(t) (quotatypes[t])
 392 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 393                                                         substring_t *args)
 394 {
 395         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 396         char *qname;
 397         int ret = -EINVAL;
 398
 399         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 400                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 401                 return -EINVAL;
 402         }
 403         if (f2fs_sb_has_quota_ino(sbi)) {
 404                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 405                 return 0;
 406         }
 407
 408         qname = match_strdup(args);
 409         if (!qname) {
 410                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 411                 return -ENOMEM;
 412         }
 413         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 414                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 415                         ret = 0;
 416                 else
 417                         f2fs_err(sbi, "%s quota file already specified",
 418                                  QTYPE2NAME(qtype));
 419                 goto errout;
 420         }
 421         if (strchr(qname, '/')) {
 422                 f2fs_err(sbi, "quotafile must be on filesystem root");
 423                 goto errout;
 424         }
 425         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 426         set_opt(sbi, QUOTA);
 427         return 0;
 428 errout:
 429         kfree(qname);
 430         return ret;
 431 }
 432
 433 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 434 {
 435         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 436
 437         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 438                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 439                 return -EINVAL;
 440         }
 441         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 442         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 443         return 0;
 444 }
 445
 446 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 447 {
 448         /*
 449          * We do the test below only for project quotas. 'usrquota' and
 450          * 'grpquota' mount options are allowed even without quota feature
 451          * to support legacy quotas in quota files.
 452          */
 453         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 454                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 455                 return -1;
 456         }
 457         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 458                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 459                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 460                 if (test_opt(sbi, USRQUOTA) &&
 461                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 462                         clear_opt(sbi, USRQUOTA);
 463
 464                 if (test_opt(sbi, GRPQUOTA) &&
 465                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 466                         clear_opt(sbi, GRPQUOTA);
 467
 468                 if (test_opt(sbi, PRJQUOTA) &&
 469                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 470                         clear_opt(sbi, PRJQUOTA);
 471
 472                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 473                                 test_opt(sbi, PRJQUOTA)) {
 474                         f2fs_err(sbi, "old and new quota format mixing");
 475                         return -1;
 476                 }
 477
 478                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 479                         f2fs_err(sbi, "journaled quota format not specified");
 480                         return -1;
 481                 }
 482         }
 483
 484         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 485                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 486                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 487         }
 488         return 0;
 489 }
 490 #endif
 491
 492 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 493                                           const char *opt,
 494                                           const substring_t *arg,
 495                                           bool is_remount)
 496 {
 497         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 498         struct fs_parameter param = {
 499                 .type = fs_value_is_string,
 500                 .string = arg->from ? arg->from : "",
 501         };
 502         struct fscrypt_dummy_policy *policy =
 503                 &F2FS_OPTION(sbi).dummy_enc_policy;
 504         int err;
 505
 506         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 507                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 508                 return -EINVAL;
 509         }
 510
 511         if (!f2fs_sb_has_encrypt(sbi)) {
 512                 f2fs_err(sbi, "Encrypt feature is off");
 513                 return -EINVAL;
 514         }
 515
 516         /*
 517          * This mount option is just for testing, and it's not worthwhile to
 518          * implement the extra complexity (e.g. RCU protection) that would be
 519          * needed to allow it to be set or changed during remount.  We do allow
 520          * it to be specified during remount, but only if there is no change.
 521          */
 522         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 523                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 524                 return -EINVAL;
 525         }
 526
 527         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 528         if (err) {
 529                 if (err == -EEXIST)
 530                         f2fs_warn(sbi,
 531                                   "Can't change test_dummy_encryption on remount");
 532                 else if (err == -EINVAL)
 533                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 534                                   opt);
 535                 else
 536                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 537                                   opt, err);
 538                 return -EINVAL;
 539         }
 540         err = fscrypt_add_test_dummy_key(sb, policy);
 541         if (err) {
 542                 f2fs_warn(sbi, "Error adding test dummy encryption key [%d]",
 543                           err);
 544                 return err;
 545         }
 546         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 547         return 0;
 548 }
 549
 550 #ifdef CONFIG_F2FS_FS_COMPRESSION
 551 /*
 552  * 1. The same extension name cannot not appear in both compress and non-compress extension
 553  * at the same time.
 554  * 2. If the compress extension specifies all files, the types specified by the non-compress
 555  * extension will be treated as special cases and will not be compressed.
 556  * 3. Don't allow the non-compress extension specifies all files.
 557  */
 558 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 559 {
 560         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 561         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 562         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 563
 564         ext = F2FS_OPTION(sbi).extensions;
 565         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 566         noext = F2FS_OPTION(sbi).noextensions;
 567         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 568
 569         if (!noext_cnt)
 570                 return 0;
 571
 572         for (no_index = 0; no_index < noext_cnt; no_index++) {
 573                 if (!strcasecmp("*", noext[no_index])) {
 574                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 575                         return -EINVAL;
 576                 }
 577                 for (index = 0; index < ext_cnt; index++) {
 578                         if (!strcasecmp(ext[index], noext[no_index])) {
 579                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 580                                                 ext[index]);
 581                                 return -EINVAL;
 582                         }
 583                 }
 584         }
 585         return 0;
 586 }
 587
 588 #ifdef CONFIG_F2FS_FS_LZ4
 589 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 590 {
 591 #ifdef CONFIG_F2FS_FS_LZ4HC
 592         unsigned int level;
 593 #endif
 594
 595         if (strlen(str) == 3) {
 596                 F2FS_OPTION(sbi).compress_level = 0;
 597                 return 0;
 598         }
 599
 600 #ifdef CONFIG_F2FS_FS_LZ4HC
 601         str += 3;
 602
 603         if (str[0] != ':') {
 604                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 605                 return -EINVAL;
 606         }
 607         if (kstrtouint(str + 1, 10, &level))
 608                 return -EINVAL;
 609
 610         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 611                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 612                 return -EINVAL;
 613         }
 614
 615         F2FS_OPTION(sbi).compress_level = level;
 616         return 0;
 617 #else
 618         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 619         return -EINVAL;
 620 #endif
 621 }
 622 #endif
 623
 624 #ifdef CONFIG_F2FS_FS_ZSTD
 625 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 626 {
 627         unsigned int level;
 628         int len = 4;
 629
 630         if (strlen(str) == len) {
 631                 F2FS_OPTION(sbi).compress_level = 0;
 632                 return 0;
 633         }
 634
 635         str += len;
 636
 637         if (str[0] != ':') {
 638                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 639                 return -EINVAL;
 640         }
 641         if (kstrtouint(str + 1, 10, &level))
 642                 return -EINVAL;
 643
 644         if (!level || level > zstd_max_clevel()) {
 645                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 646                 return -EINVAL;
 647         }
 648
 649         F2FS_OPTION(sbi).compress_level = level;
 650         return 0;
 651 }
 652 #endif
 653 #endif
 654
 655 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 656 {
 657         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 658         substring_t args[MAX_OPT_ARGS];
 659 #ifdef CONFIG_F2FS_FS_COMPRESSION
 660         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 661         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 662         int ext_cnt, noext_cnt;
 663 #endif
 664         char *p, *name;
 665         int arg = 0;
 666         kuid_t uid;
 667         kgid_t gid;
 668         int ret;
 669
 670         if (!options)
 671                 goto default_check;
 672
 673         while ((p = strsep(&options, ",")) != NULL) {
 674                 int token;
 675
 676                 if (!*p)
 677                         continue;
 678                 /*
 679                  * Initialize args struct so we know whether arg was
 680                  * found; some options take optional arguments.
 681                  */
 682                 args[0].to = args[0].from = NULL;
 683                 token = match_token(p, f2fs_tokens, args);
 684
 685                 switch (token) {
 686                 case Opt_gc_background:
 687                         name = match_strdup(&args[0]);
 688
 689                         if (!name)
 690                                 return -ENOMEM;
 691                         if (!strcmp(name, "on")) {
 692                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 693                         } else if (!strcmp(name, "off")) {
 694                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 695                         } else if (!strcmp(name, "sync")) {
 696                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 697                         } else {
 698                                 kfree(name);
 699                                 return -EINVAL;
 700                         }
 701                         kfree(name);
 702                         break;
 703                 case Opt_disable_roll_forward:
 704                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 705                         break;
 706                 case Opt_norecovery:
 707                         /* this option mounts f2fs with ro */
 708                         set_opt(sbi, NORECOVERY);
 709                         if (!f2fs_readonly(sb))
 710                                 return -EINVAL;
 711                         break;
 712                 case Opt_discard:
 713                         if (!f2fs_hw_support_discard(sbi)) {
 714                                 f2fs_warn(sbi, "device does not support discard");
 715                                 break;
 716                         }
 717                         set_opt(sbi, DISCARD);
 718                         break;
 719                 case Opt_nodiscard:
 720                         if (f2fs_hw_should_discard(sbi)) {
 721                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 722                                 return -EINVAL;
 723                         }
 724                         clear_opt(sbi, DISCARD);
 725                         break;
 726                 case Opt_noheap:
 727                         set_opt(sbi, NOHEAP);
 728                         break;
 729                 case Opt_heap:
 730                         clear_opt(sbi, NOHEAP);
 731                         break;
 732 #ifdef CONFIG_F2FS_FS_XATTR
 733                 case Opt_user_xattr:
 734                         set_opt(sbi, XATTR_USER);
 735                         break;
 736                 case Opt_nouser_xattr:
 737                         clear_opt(sbi, XATTR_USER);
 738                         break;
 739                 case Opt_inline_xattr:
 740                         set_opt(sbi, INLINE_XATTR);
 741                         break;
 742                 case Opt_noinline_xattr:
 743                         clear_opt(sbi, INLINE_XATTR);
 744                         break;
 745                 case Opt_inline_xattr_size:
 746                         if (args->from && match_int(args, &arg))
 747                                 return -EINVAL;
 748                         set_opt(sbi, INLINE_XATTR_SIZE);
 749                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 750                         break;
 751 #else
 752                 case Opt_user_xattr:
 753                         f2fs_info(sbi, "user_xattr options not supported");
 754                         break;
 755                 case Opt_nouser_xattr:
 756                         f2fs_info(sbi, "nouser_xattr options not supported");
 757                         break;
 758                 case Opt_inline_xattr:
 759                         f2fs_info(sbi, "inline_xattr options not supported");
 760                         break;
 761                 case Opt_noinline_xattr:
 762                         f2fs_info(sbi, "noinline_xattr options not supported");
 763                         break;
 764 #endif
 765 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 766                 case Opt_acl:
 767                         set_opt(sbi, POSIX_ACL);
 768                         break;
 769                 case Opt_noacl:
 770                         clear_opt(sbi, POSIX_ACL);
 771                         break;
 772 #else
 773                 case Opt_acl:
 774                         f2fs_info(sbi, "acl options not supported");
 775                         break;
 776                 case Opt_noacl:
 777                         f2fs_info(sbi, "noacl options not supported");
 778                         break;
 779 #endif
 780                 case Opt_active_logs:
 781                         if (args->from && match_int(args, &arg))
 782                                 return -EINVAL;
 783                         if (arg != 2 && arg != 4 &&
 784                                 arg != NR_CURSEG_PERSIST_TYPE)
 785                                 return -EINVAL;
 786                         F2FS_OPTION(sbi).active_logs = arg;
 787                         break;
 788                 case Opt_disable_ext_identify:
 789                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 790                         break;
 791                 case Opt_inline_data:
 792                         set_opt(sbi, INLINE_DATA);
 793                         break;
 794                 case Opt_inline_dentry:
 795                         set_opt(sbi, INLINE_DENTRY);
 796                         break;
 797                 case Opt_noinline_dentry:
 798                         clear_opt(sbi, INLINE_DENTRY);
 799                         break;
 800                 case Opt_flush_merge:
 801                         set_opt(sbi, FLUSH_MERGE);
 802                         break;
 803                 case Opt_noflush_merge:
 804                         clear_opt(sbi, FLUSH_MERGE);
 805                         break;
 806                 case Opt_nobarrier:
 807                         set_opt(sbi, NOBARRIER);
 808                         break;
 809                 case Opt_fastboot:
 810                         set_opt(sbi, FASTBOOT);
 811                         break;
 812                 case Opt_extent_cache:
 813                         set_opt(sbi, EXTENT_CACHE);
 814                         break;
 815                 case Opt_noextent_cache:
 816                         clear_opt(sbi, EXTENT_CACHE);
 817                         break;
 818                 case Opt_noinline_data:
 819                         clear_opt(sbi, INLINE_DATA);
 820                         break;
 821                 case Opt_data_flush:
 822                         set_opt(sbi, DATA_FLUSH);
 823                         break;
 824                 case Opt_reserve_root:
 825                         if (args->from && match_int(args, &arg))
 826                                 return -EINVAL;
 827                         if (test_opt(sbi, RESERVE_ROOT)) {
 828                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 829                                           F2FS_OPTION(sbi).root_reserved_blocks);
 830                         } else {
 831                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 832                                 set_opt(sbi, RESERVE_ROOT);
 833                         }
 834                         break;
 835                 case Opt_resuid:
 836                         if (args->from && match_int(args, &arg))
 837                                 return -EINVAL;
 838                         uid = make_kuid(current_user_ns(), arg);
 839                         if (!uid_valid(uid)) {
 840                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 841                                 return -EINVAL;
 842                         }
 843                         F2FS_OPTION(sbi).s_resuid = uid;
 844                         break;
 845                 case Opt_resgid:
 846                         if (args->from && match_int(args, &arg))
 847                                 return -EINVAL;
 848                         gid = make_kgid(current_user_ns(), arg);
 849                         if (!gid_valid(gid)) {
 850                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 851                                 return -EINVAL;
 852                         }
 853                         F2FS_OPTION(sbi).s_resgid = gid;
 854                         break;
 855                 case Opt_mode:
 856                         name = match_strdup(&args[0]);
 857
 858                         if (!name)
 859                                 return -ENOMEM;
 860                         if (!strcmp(name, "adaptive")) {
 861                                 if (f2fs_sb_has_blkzoned(sbi)) {
 862                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 863                                         kfree(name);
 864                                         return -EINVAL;
 865                                 }
 866                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 867                         } else if (!strcmp(name, "lfs")) {
 868                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 869                         } else if (!strcmp(name, "fragment:segment")) {
 870                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 871                         } else if (!strcmp(name, "fragment:block")) {
 872                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 873                         } else {
 874                                 kfree(name);
 875                                 return -EINVAL;
 876                         }
 877                         kfree(name);
 878                         break;
 879                 case Opt_io_size_bits:
 880                         if (args->from && match_int(args, &arg))
 881                                 return -EINVAL;
 882                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 883                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 884                                           1 << arg, BIO_MAX_VECS);
 885                                 return -EINVAL;
 886                         }
 887                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 888                         break;
 889 #ifdef CONFIG_F2FS_FAULT_INJECTION
 890                 case Opt_fault_injection:
 891                         if (args->from && match_int(args, &arg))
 892                                 return -EINVAL;
 893                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 894                         set_opt(sbi, FAULT_INJECTION);
 895                         break;
 896
 897                 case Opt_fault_type:
 898                         if (args->from && match_int(args, &arg))
 899                                 return -EINVAL;
 900                         f2fs_build_fault_attr(sbi, 0, arg);
 901                         set_opt(sbi, FAULT_INJECTION);
 902                         break;
 903 #else
 904                 case Opt_fault_injection:
 905                         f2fs_info(sbi, "fault_injection options not supported");
 906                         break;
 907
 908                 case Opt_fault_type:
 909                         f2fs_info(sbi, "fault_type options not supported");
 910                         break;
 911 #endif
 912                 case Opt_lazytime:
 913                         sb->s_flags |= SB_LAZYTIME;
 914                         break;
 915                 case Opt_nolazytime:
 916                         sb->s_flags &= ~SB_LAZYTIME;
 917                         break;
 918 #ifdef CONFIG_QUOTA
 919                 case Opt_quota:
 920                 case Opt_usrquota:
 921                         set_opt(sbi, USRQUOTA);
 922                         break;
 923                 case Opt_grpquota:
 924                         set_opt(sbi, GRPQUOTA);
 925                         break;
 926                 case Opt_prjquota:
 927                         set_opt(sbi, PRJQUOTA);
 928                         break;
 929                 case Opt_usrjquota:
 930                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 931                         if (ret)
 932                                 return ret;
 933                         break;
 934                 case Opt_grpjquota:
 935                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 936                         if (ret)
 937                                 return ret;
 938                         break;
 939                 case Opt_prjjquota:
 940                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 941                         if (ret)
 942                                 return ret;
 943                         break;
 944                 case Opt_offusrjquota:
 945                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 946                         if (ret)
 947                                 return ret;
 948                         break;
 949                 case Opt_offgrpjquota:
 950                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 951                         if (ret)
 952                                 return ret;
 953                         break;
 954                 case Opt_offprjjquota:
 955                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 956                         if (ret)
 957                                 return ret;
 958                         break;
 959                 case Opt_jqfmt_vfsold:
 960                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 961                         break;
 962                 case Opt_jqfmt_vfsv0:
 963                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 964                         break;
 965                 case Opt_jqfmt_vfsv1:
 966                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 967                         break;
 968                 case Opt_noquota:
 969                         clear_opt(sbi, QUOTA);
 970                         clear_opt(sbi, USRQUOTA);
 971                         clear_opt(sbi, GRPQUOTA);
 972                         clear_opt(sbi, PRJQUOTA);
 973                         break;
 974 #else
 975                 case Opt_quota:
 976                 case Opt_usrquota:
 977                 case Opt_grpquota:
 978                 case Opt_prjquota:
 979                 case Opt_usrjquota:
 980                 case Opt_grpjquota:
 981                 case Opt_prjjquota:
 982                 case Opt_offusrjquota:
 983                 case Opt_offgrpjquota:
 984                 case Opt_offprjjquota:
 985                 case Opt_jqfmt_vfsold:
 986                 case Opt_jqfmt_vfsv0:
 987                 case Opt_jqfmt_vfsv1:
 988                 case Opt_noquota:
 989                         f2fs_info(sbi, "quota operations not supported");
 990                         break;
 991 #endif
 992                 case Opt_alloc:
 993                         name = match_strdup(&args[0]);
 994                         if (!name)
 995                                 return -ENOMEM;
 996
 997                         if (!strcmp(name, "default")) {
 998                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 999                         } else if (!strcmp(name, "reuse")) {
1000                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1001                         } else {
1002                                 kfree(name);
1003                                 return -EINVAL;
1004                         }
1005                         kfree(name);
1006                         break;
1007                 case Opt_fsync:
1008                         name = match_strdup(&args[0]);
1009                         if (!name)
1010                                 return -ENOMEM;
1011                         if (!strcmp(name, "posix")) {
1012                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1013                         } else if (!strcmp(name, "strict")) {
1014                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1015                         } else if (!strcmp(name, "nobarrier")) {
1016                                 F2FS_OPTION(sbi).fsync_mode =
1017                                                         FSYNC_MODE_NOBARRIER;
1018                         } else {
1019                                 kfree(name);
1020                                 return -EINVAL;
1021                         }
1022                         kfree(name);
1023                         break;
1024                 case Opt_test_dummy_encryption:
1025                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1026                                                              is_remount);
1027                         if (ret)
1028                                 return ret;
1029                         break;
1030                 case Opt_inlinecrypt:
1031 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1032                         sb->s_flags |= SB_INLINECRYPT;
1033 #else
1034                         f2fs_info(sbi, "inline encryption not supported");
1035 #endif
1036                         break;
1037                 case Opt_checkpoint_disable_cap_perc:
1038                         if (args->from && match_int(args, &arg))
1039                                 return -EINVAL;
1040                         if (arg < 0 || arg > 100)
1041                                 return -EINVAL;
1042                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1043                         set_opt(sbi, DISABLE_CHECKPOINT);
1044                         break;
1045                 case Opt_checkpoint_disable_cap:
1046                         if (args->from && match_int(args, &arg))
1047                                 return -EINVAL;
1048                         F2FS_OPTION(sbi).unusable_cap = arg;
1049                         set_opt(sbi, DISABLE_CHECKPOINT);
1050                         break;
1051                 case Opt_checkpoint_disable:
1052                         set_opt(sbi, DISABLE_CHECKPOINT);
1053                         break;
1054                 case Opt_checkpoint_enable:
1055                         clear_opt(sbi, DISABLE_CHECKPOINT);
1056                         break;
1057                 case Opt_checkpoint_merge:
1058                         set_opt(sbi, MERGE_CHECKPOINT);
1059                         break;
1060                 case Opt_nocheckpoint_merge:
1061                         clear_opt(sbi, MERGE_CHECKPOINT);
1062                         break;
1063 #ifdef CONFIG_F2FS_FS_COMPRESSION
1064                 case Opt_compress_algorithm:
1065                         if (!f2fs_sb_has_compression(sbi)) {
1066                                 f2fs_info(sbi, "Image doesn't support compression");
1067                                 break;
1068                         }
1069                         name = match_strdup(&args[0]);
1070                         if (!name)
1071                                 return -ENOMEM;
1072                         if (!strcmp(name, "lzo")) {
1073 #ifdef CONFIG_F2FS_FS_LZO
1074                                 F2FS_OPTION(sbi).compress_level = 0;
1075                                 F2FS_OPTION(sbi).compress_algorithm =
1076                                                                 COMPRESS_LZO;
1077 #else
1078                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1079 #endif
1080                         } else if (!strncmp(name, "lz4", 3)) {
1081 #ifdef CONFIG_F2FS_FS_LZ4
1082                                 ret = f2fs_set_lz4hc_level(sbi, name);
1083                                 if (ret) {
1084                                         kfree(name);
1085                                         return -EINVAL;
1086                                 }
1087                                 F2FS_OPTION(sbi).compress_algorithm =
1088                                                                 COMPRESS_LZ4;
1089 #else
1090                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1091 #endif
1092                         } else if (!strncmp(name, "zstd", 4)) {
1093 #ifdef CONFIG_F2FS_FS_ZSTD
1094                                 ret = f2fs_set_zstd_level(sbi, name);
1095                                 if (ret) {
1096                                         kfree(name);
1097                                         return -EINVAL;
1098                                 }
1099                                 F2FS_OPTION(sbi).compress_algorithm =
1100                                                                 COMPRESS_ZSTD;
1101 #else
1102                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1103 #endif
1104                         } else if (!strcmp(name, "lzo-rle")) {
1105 #ifdef CONFIG_F2FS_FS_LZORLE
1106                                 F2FS_OPTION(sbi).compress_level = 0;
1107                                 F2FS_OPTION(sbi).compress_algorithm =
1108                                                                 COMPRESS_LZORLE;
1109 #else
1110                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1111 #endif
1112                         } else {
1113                                 kfree(name);
1114                                 return -EINVAL;
1115                         }
1116                         kfree(name);
1117                         break;
1118                 case Opt_compress_log_size:
1119                         if (!f2fs_sb_has_compression(sbi)) {
1120                                 f2fs_info(sbi, "Image doesn't support compression");
1121                                 break;
1122                         }
1123                         if (args->from && match_int(args, &arg))
1124                                 return -EINVAL;
1125                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1126                                 arg > MAX_COMPRESS_LOG_SIZE) {
1127                                 f2fs_err(sbi,
1128                                         "Compress cluster log size is out of range");
1129                                 return -EINVAL;
1130                         }
1131                         F2FS_OPTION(sbi).compress_log_size = arg;
1132                         break;
1133                 case Opt_compress_extension:
1134                         if (!f2fs_sb_has_compression(sbi)) {
1135                                 f2fs_info(sbi, "Image doesn't support compression");
1136                                 break;
1137                         }
1138                         name = match_strdup(&args[0]);
1139                         if (!name)
1140                                 return -ENOMEM;
1141
1142                         ext = F2FS_OPTION(sbi).extensions;
1143                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1144
1145                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1146                                 ext_cnt >= COMPRESS_EXT_NUM) {
1147                                 f2fs_err(sbi,
1148                                         "invalid extension length/number");
1149                                 kfree(name);
1150                                 return -EINVAL;
1151                         }
1152
1153                         strcpy(ext[ext_cnt], name);
1154                         F2FS_OPTION(sbi).compress_ext_cnt++;
1155                         kfree(name);
1156                         break;
1157                 case Opt_nocompress_extension:
1158                         if (!f2fs_sb_has_compression(sbi)) {
1159                                 f2fs_info(sbi, "Image doesn't support compression");
1160                                 break;
1161                         }
1162                         name = match_strdup(&args[0]);
1163                         if (!name)
1164                                 return -ENOMEM;
1165
1166                         noext = F2FS_OPTION(sbi).noextensions;
1167                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1168
1169                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1170                                 noext_cnt >= COMPRESS_EXT_NUM) {
1171                                 f2fs_err(sbi,
1172                                         "invalid extension length/number");
1173                                 kfree(name);
1174                                 return -EINVAL;
1175                         }
1176
1177                         strcpy(noext[noext_cnt], name);
1178                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1179                         kfree(name);
1180                         break;
1181                 case Opt_compress_chksum:
1182                         F2FS_OPTION(sbi).compress_chksum = true;
1183                         break;
1184                 case Opt_compress_mode:
1185                         name = match_strdup(&args[0]);
1186                         if (!name)
1187                                 return -ENOMEM;
1188                         if (!strcmp(name, "fs")) {
1189                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1190                         } else if (!strcmp(name, "user")) {
1191                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1192                         } else {
1193                                 kfree(name);
1194                                 return -EINVAL;
1195                         }
1196                         kfree(name);
1197                         break;
1198                 case Opt_compress_cache:
1199                         set_opt(sbi, COMPRESS_CACHE);
1200                         break;
1201 #else
1202                 case Opt_compress_algorithm:
1203                 case Opt_compress_log_size:
1204                 case Opt_compress_extension:
1205                 case Opt_nocompress_extension:
1206                 case Opt_compress_chksum:
1207                 case Opt_compress_mode:
1208                 case Opt_compress_cache:
1209                         f2fs_info(sbi, "compression options not supported");
1210                         break;
1211 #endif
1212                 case Opt_atgc:
1213                         set_opt(sbi, ATGC);
1214                         break;
1215                 case Opt_gc_merge:
1216                         set_opt(sbi, GC_MERGE);
1217                         break;
1218                 case Opt_nogc_merge:
1219                         clear_opt(sbi, GC_MERGE);
1220                         break;
1221                 case Opt_discard_unit:
1222                         name = match_strdup(&args[0]);
1223                         if (!name)
1224                                 return -ENOMEM;
1225                         if (!strcmp(name, "block")) {
1226                                 F2FS_OPTION(sbi).discard_unit =
1227                                                 DISCARD_UNIT_BLOCK;
1228                         } else if (!strcmp(name, "segment")) {
1229                                 F2FS_OPTION(sbi).discard_unit =
1230                                                 DISCARD_UNIT_SEGMENT;
1231                         } else if (!strcmp(name, "section")) {
1232                                 F2FS_OPTION(sbi).discard_unit =
1233                                                 DISCARD_UNIT_SECTION;
1234                         } else {
1235                                 kfree(name);
1236                                 return -EINVAL;
1237                         }
1238                         kfree(name);
1239                         break;
1240                 case Opt_memory_mode:
1241                         name = match_strdup(&args[0]);
1242                         if (!name)
1243                                 return -ENOMEM;
1244                         if (!strcmp(name, "normal")) {
1245                                 F2FS_OPTION(sbi).memory_mode =
1246                                                 MEMORY_MODE_NORMAL;
1247                         } else if (!strcmp(name, "low")) {
1248                                 F2FS_OPTION(sbi).memory_mode =
1249                                                 MEMORY_MODE_LOW;
1250                         } else {
1251                                 kfree(name);
1252                                 return -EINVAL;
1253                         }
1254                         kfree(name);
1255                         break;
1256                 default:
1257                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1258                                  p);
1259                         return -EINVAL;
1260                 }
1261         }
1262 default_check:
1263 #ifdef CONFIG_QUOTA
1264         if (f2fs_check_quota_options(sbi))
1265                 return -EINVAL;
1266 #else
1267         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1268                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1269                 return -EINVAL;
1270         }
1271         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1272                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1273                 return -EINVAL;
1274         }
1275 #endif
1276 #if !IS_ENABLED(CONFIG_UNICODE)
1277         if (f2fs_sb_has_casefold(sbi)) {
1278                 f2fs_err(sbi,
1279                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1280                 return -EINVAL;
1281         }
1282 #endif
1283         /*
1284          * The BLKZONED feature indicates that the drive was formatted with
1285          * zone alignment optimization. This is optional for host-aware
1286          * devices, but mandatory for host-managed zoned block devices.
1287          */
1288 #ifndef CONFIG_BLK_DEV_ZONED
1289         if (f2fs_sb_has_blkzoned(sbi)) {
1290                 f2fs_err(sbi, "Zoned block device support is not enabled");
1291                 return -EINVAL;
1292         }
1293 #endif
1294         if (f2fs_sb_has_blkzoned(sbi)) {
1295                 if (F2FS_OPTION(sbi).discard_unit !=
1296                                                 DISCARD_UNIT_SECTION) {
1297                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1298                         F2FS_OPTION(sbi).discard_unit =
1299                                         DISCARD_UNIT_SECTION;
1300                 }
1301         }
1302
1303 #ifdef CONFIG_F2FS_FS_COMPRESSION
1304         if (f2fs_test_compress_extension(sbi)) {
1305                 f2fs_err(sbi, "invalid compress or nocompress extension");
1306                 return -EINVAL;
1307         }
1308 #endif
1309
1310         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1311                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1312                          F2FS_IO_SIZE_KB(sbi));
1313                 return -EINVAL;
1314         }
1315
1316         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1317                 int min_size, max_size;
1318
1319                 if (!f2fs_sb_has_extra_attr(sbi) ||
1320                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1321                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1322                         return -EINVAL;
1323                 }
1324                 if (!test_opt(sbi, INLINE_XATTR)) {
1325                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1326                         return -EINVAL;
1327                 }
1328
1329                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1330                 max_size = MAX_INLINE_XATTR_SIZE;
1331
1332                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1333                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1334                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1335                                  min_size, max_size);
1336                         return -EINVAL;
1337                 }
1338         }
1339
1340         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1341                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1342                 return -EINVAL;
1343         }
1344
1345         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1346                 f2fs_err(sbi, "Allow to mount readonly mode only");
1347                 return -EROFS;
1348         }
1349         return 0;
1350 }
1351
1352 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1353 {
1354         struct f2fs_inode_info *fi;
1355
1356         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC)) {
1357                 f2fs_show_injection_info(F2FS_SB(sb), FAULT_SLAB_ALLOC);
1358                 return NULL;
1359         }
1360
1361         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1362         if (!fi)
1363                 return NULL;
1364
1365         init_once((void *) fi);
1366
1367         /* Initialize f2fs-specific inode info */
1368         atomic_set(&fi->dirty_pages, 0);
1369         atomic_set(&fi->i_compr_blocks, 0);
1370         init_f2fs_rwsem(&fi->i_sem);
1371         spin_lock_init(&fi->i_size_lock);
1372         INIT_LIST_HEAD(&fi->dirty_list);
1373         INIT_LIST_HEAD(&fi->gdirty_list);
1374         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1375         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1376         init_f2fs_rwsem(&fi->i_xattr_sem);
1377
1378         /* Will be used by directory only */
1379         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1380
1381         return &fi->vfs_inode;
1382 }
1383
1384 static int f2fs_drop_inode(struct inode *inode)
1385 {
1386         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1387         int ret;
1388
1389         /*
1390          * during filesystem shutdown, if checkpoint is disabled,
1391          * drop useless meta/node dirty pages.
1392          */
1393         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1394                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1395                         inode->i_ino == F2FS_META_INO(sbi)) {
1396                         trace_f2fs_drop_inode(inode, 1);
1397                         return 1;
1398                 }
1399         }
1400
1401         /*
1402          * This is to avoid a deadlock condition like below.
1403          * writeback_single_inode(inode)
1404          *  - f2fs_write_data_page
1405          *    - f2fs_gc -> iput -> evict
1406          *       - inode_wait_for_writeback(inode)
1407          */
1408         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1409                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1410                         /* to avoid evict_inode call simultaneously */
1411                         atomic_inc(&inode->i_count);
1412                         spin_unlock(&inode->i_lock);
1413
1414                         f2fs_abort_atomic_write(inode, true);
1415
1416                         /* should remain fi->extent_tree for writepage */
1417                         f2fs_destroy_extent_node(inode);
1418
1419                         sb_start_intwrite(inode->i_sb);
1420                         f2fs_i_size_write(inode, 0);
1421
1422                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1423                                         inode, NULL, 0, DATA);
1424                         truncate_inode_pages_final(inode->i_mapping);
1425
1426                         if (F2FS_HAS_BLOCKS(inode))
1427                                 f2fs_truncate(inode);
1428
1429                         sb_end_intwrite(inode->i_sb);
1430
1431                         spin_lock(&inode->i_lock);
1432                         atomic_dec(&inode->i_count);
1433                 }
1434                 trace_f2fs_drop_inode(inode, 0);
1435                 return 0;
1436         }
1437         ret = generic_drop_inode(inode);
1438         if (!ret)
1439                 ret = fscrypt_drop_inode(inode);
1440         trace_f2fs_drop_inode(inode, ret);
1441         return ret;
1442 }
1443
1444 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1445 {
1446         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1447         int ret = 0;
1448
1449         spin_lock(&sbi->inode_lock[DIRTY_META]);
1450         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1451                 ret = 1;
1452         } else {
1453                 set_inode_flag(inode, FI_DIRTY_INODE);
1454                 stat_inc_dirty_inode(sbi, DIRTY_META);
1455         }
1456         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1457                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1458                                 &sbi->inode_list[DIRTY_META]);
1459                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1460         }
1461         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1462         return ret;
1463 }
1464
1465 void f2fs_inode_synced(struct inode *inode)
1466 {
1467         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1468
1469         spin_lock(&sbi->inode_lock[DIRTY_META]);
1470         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1471                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1472                 return;
1473         }
1474         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1475                 list_del_init(&F2FS_I(inode)->gdirty_list);
1476                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1477         }
1478         clear_inode_flag(inode, FI_DIRTY_INODE);
1479         clear_inode_flag(inode, FI_AUTO_RECOVER);
1480         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1481         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1482 }
1483
1484 /*
1485  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1486  *
1487  * We should call set_dirty_inode to write the dirty inode through write_inode.
1488  */
1489 static void f2fs_dirty_inode(struct inode *inode, int flags)
1490 {
1491         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1492
1493         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1494                         inode->i_ino == F2FS_META_INO(sbi))
1495                 return;
1496
1497         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1498                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1499
1500         f2fs_inode_dirtied(inode, false);
1501 }
1502
1503 static void f2fs_free_inode(struct inode *inode)
1504 {
1505         fscrypt_free_inode(inode);
1506         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1507 }
1508
1509 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1510 {
1511         percpu_counter_destroy(&sbi->total_valid_inode_count);
1512         percpu_counter_destroy(&sbi->rf_node_block_count);
1513         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1514 }
1515
1516 static void destroy_device_list(struct f2fs_sb_info *sbi)
1517 {
1518         int i;
1519
1520         for (i = 0; i < sbi->s_ndevs; i++) {
1521                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1522 #ifdef CONFIG_BLK_DEV_ZONED
1523                 kvfree(FDEV(i).blkz_seq);
1524 #endif
1525         }
1526         kvfree(sbi->devs);
1527 }
1528
1529 static void f2fs_put_super(struct super_block *sb)
1530 {
1531         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1532         int i;
1533         bool dropped;
1534
1535         /* unregister procfs/sysfs entries in advance to avoid race case */
1536         f2fs_unregister_sysfs(sbi);
1537
1538         f2fs_quota_off_umount(sb);
1539
1540         /* prevent remaining shrinker jobs */
1541         mutex_lock(&sbi->umount_mutex);
1542
1543         /*
1544          * flush all issued checkpoints and stop checkpoint issue thread.
1545          * after then, all checkpoints should be done by each process context.
1546          */
1547         f2fs_stop_ckpt_thread(sbi);
1548
1549         /*
1550          * We don't need to do checkpoint when superblock is clean.
1551          * But, the previous checkpoint was not done by umount, it needs to do
1552          * clean checkpoint again.
1553          */
1554         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1555                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1556                 struct cp_control cpc = {
1557                         .reason = CP_UMOUNT,
1558                 };
1559                 f2fs_write_checkpoint(sbi, &cpc);
1560         }
1561
1562         /* be sure to wait for any on-going discard commands */
1563         dropped = f2fs_issue_discard_timeout(sbi);
1564
1565         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1566                                         !sbi->discard_blks && !dropped) {
1567                 struct cp_control cpc = {
1568                         .reason = CP_UMOUNT | CP_TRIMMED,
1569                 };
1570                 f2fs_write_checkpoint(sbi, &cpc);
1571         }
1572
1573         /*
1574          * normally superblock is clean, so we need to release this.
1575          * In addition, EIO will skip do checkpoint, we need this as well.
1576          */
1577         f2fs_release_ino_entry(sbi, true);
1578
1579         f2fs_leave_shrinker(sbi);
1580         mutex_unlock(&sbi->umount_mutex);
1581
1582         /* our cp_error case, we can wait for any writeback page */
1583         f2fs_flush_merged_writes(sbi);
1584
1585         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1586
1587         f2fs_bug_on(sbi, sbi->fsync_node_num);
1588
1589         f2fs_destroy_compress_inode(sbi);
1590
1591         iput(sbi->node_inode);
1592         sbi->node_inode = NULL;
1593
1594         iput(sbi->meta_inode);
1595         sbi->meta_inode = NULL;
1596
1597         /*
1598          * iput() can update stat information, if f2fs_write_checkpoint()
1599          * above failed with error.
1600          */
1601         f2fs_destroy_stats(sbi);
1602
1603         /* destroy f2fs internal modules */
1604         f2fs_destroy_node_manager(sbi);
1605         f2fs_destroy_segment_manager(sbi);
1606
1607         f2fs_destroy_post_read_wq(sbi);
1608
1609         kvfree(sbi->ckpt);
1610
1611         sb->s_fs_info = NULL;
1612         if (sbi->s_chksum_driver)
1613                 crypto_free_shash(sbi->s_chksum_driver);
1614         kfree(sbi->raw_super);
1615
1616         destroy_device_list(sbi);
1617         f2fs_destroy_page_array_cache(sbi);
1618         f2fs_destroy_xattr_caches(sbi);
1619         mempool_destroy(sbi->write_io_dummy);
1620 #ifdef CONFIG_QUOTA
1621         for (i = 0; i < MAXQUOTAS; i++)
1622                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1623 #endif
1624         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1625         destroy_percpu_info(sbi);
1626         f2fs_destroy_iostat(sbi);
1627         for (i = 0; i < NR_PAGE_TYPE; i++)
1628                 kvfree(sbi->write_io[i]);
1629 #if IS_ENABLED(CONFIG_UNICODE)
1630         utf8_unload(sb->s_encoding);
1631 #endif
1632         kfree(sbi);
1633 }
1634
1635 int f2fs_sync_fs(struct super_block *sb, int sync)
1636 {
1637         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1638         int err = 0;
1639
1640         if (unlikely(f2fs_cp_error(sbi)))
1641                 return 0;
1642         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1643                 return 0;
1644
1645         trace_f2fs_sync_fs(sb, sync);
1646
1647         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1648                 return -EAGAIN;
1649
1650         if (sync)
1651                 err = f2fs_issue_checkpoint(sbi);
1652
1653         return err;
1654 }
1655
1656 static int f2fs_freeze(struct super_block *sb)
1657 {
1658         if (f2fs_readonly(sb))
1659                 return 0;
1660
1661         /* IO error happened before */
1662         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1663                 return -EIO;
1664
1665         /* must be clean, since sync_filesystem() was already called */
1666         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1667                 return -EINVAL;
1668
1669         /* ensure no checkpoint required */
1670         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1671                 return -EINVAL;
1672
1673         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1674         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1675         return 0;
1676 }
1677
1678 static int f2fs_unfreeze(struct super_block *sb)
1679 {
1680         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1681         return 0;
1682 }
1683
1684 #ifdef CONFIG_QUOTA
1685 static int f2fs_statfs_project(struct super_block *sb,
1686                                 kprojid_t projid, struct kstatfs *buf)
1687 {
1688         struct kqid qid;
1689         struct dquot *dquot;
1690         u64 limit;
1691         u64 curblock;
1692
1693         qid = make_kqid_projid(projid);
1694         dquot = dqget(sb, qid);
1695         if (IS_ERR(dquot))
1696                 return PTR_ERR(dquot);
1697         spin_lock(&dquot->dq_dqb_lock);
1698
1699         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1700                                         dquot->dq_dqb.dqb_bhardlimit);
1701         if (limit)
1702                 limit >>= sb->s_blocksize_bits;
1703
1704         if (limit && buf->f_blocks > limit) {
1705                 curblock = (dquot->dq_dqb.dqb_curspace +
1706                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1707                 buf->f_blocks = limit;
1708                 buf->f_bfree = buf->f_bavail =
1709                         (buf->f_blocks > curblock) ?
1710                          (buf->f_blocks - curblock) : 0;
1711         }
1712
1713         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1714                                         dquot->dq_dqb.dqb_ihardlimit);
1715
1716         if (limit && buf->f_files > limit) {
1717                 buf->f_files = limit;
1718                 buf->f_ffree =
1719                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1720                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1721         }
1722
1723         spin_unlock(&dquot->dq_dqb_lock);
1724         dqput(dquot);
1725         return 0;
1726 }
1727 #endif
1728
1729 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1730 {
1731         struct super_block *sb = dentry->d_sb;
1732         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1733         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1734         block_t total_count, user_block_count, start_count;
1735         u64 avail_node_count;
1736         unsigned int total_valid_node_count;
1737
1738         total_count = le64_to_cpu(sbi->raw_super->block_count);
1739         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1740         buf->f_type = F2FS_SUPER_MAGIC;
1741         buf->f_bsize = sbi->blocksize;
1742
1743         buf->f_blocks = total_count - start_count;
1744
1745         spin_lock(&sbi->stat_lock);
1746
1747         user_block_count = sbi->user_block_count;
1748         total_valid_node_count = valid_node_count(sbi);
1749         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1750         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1751                                                 sbi->current_reserved_blocks;
1752
1753         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1754                 buf->f_bfree = 0;
1755         else
1756                 buf->f_bfree -= sbi->unusable_block_count;
1757         spin_unlock(&sbi->stat_lock);
1758
1759         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1760                 buf->f_bavail = buf->f_bfree -
1761                                 F2FS_OPTION(sbi).root_reserved_blocks;
1762         else
1763                 buf->f_bavail = 0;
1764
1765         if (avail_node_count > user_block_count) {
1766                 buf->f_files = user_block_count;
1767                 buf->f_ffree = buf->f_bavail;
1768         } else {
1769                 buf->f_files = avail_node_count;
1770                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1771                                         buf->f_bavail);
1772         }
1773
1774         buf->f_namelen = F2FS_NAME_LEN;
1775         buf->f_fsid    = u64_to_fsid(id);
1776
1777 #ifdef CONFIG_QUOTA
1778         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1779                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1780                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1781         }
1782 #endif
1783         return 0;
1784 }
1785
1786 static inline void f2fs_show_quota_options(struct seq_file *seq,
1787                                            struct super_block *sb)
1788 {
1789 #ifdef CONFIG_QUOTA
1790         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1791
1792         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1793                 char *fmtname = "";
1794
1795                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1796                 case QFMT_VFS_OLD:
1797                         fmtname = "vfsold";
1798                         break;
1799                 case QFMT_VFS_V0:
1800                         fmtname = "vfsv0";
1801                         break;
1802                 case QFMT_VFS_V1:
1803                         fmtname = "vfsv1";
1804                         break;
1805                 }
1806                 seq_printf(seq, ",jqfmt=%s", fmtname);
1807         }
1808
1809         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1810                 seq_show_option(seq, "usrjquota",
1811                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1812
1813         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1814                 seq_show_option(seq, "grpjquota",
1815                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1816
1817         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1818                 seq_show_option(seq, "prjjquota",
1819                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1820 #endif
1821 }
1822
1823 #ifdef CONFIG_F2FS_FS_COMPRESSION
1824 static inline void f2fs_show_compress_options(struct seq_file *seq,
1825                                                         struct super_block *sb)
1826 {
1827         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1828         char *algtype = "";
1829         int i;
1830
1831         if (!f2fs_sb_has_compression(sbi))
1832                 return;
1833
1834         switch (F2FS_OPTION(sbi).compress_algorithm) {
1835         case COMPRESS_LZO:
1836                 algtype = "lzo";
1837                 break;
1838         case COMPRESS_LZ4:
1839                 algtype = "lz4";
1840                 break;
1841         case COMPRESS_ZSTD:
1842                 algtype = "zstd";
1843                 break;
1844         case COMPRESS_LZORLE:
1845                 algtype = "lzo-rle";
1846                 break;
1847         }
1848         seq_printf(seq, ",compress_algorithm=%s", algtype);
1849
1850         if (F2FS_OPTION(sbi).compress_level)
1851                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1852
1853         seq_printf(seq, ",compress_log_size=%u",
1854                         F2FS_OPTION(sbi).compress_log_size);
1855
1856         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1857                 seq_printf(seq, ",compress_extension=%s",
1858                         F2FS_OPTION(sbi).extensions[i]);
1859         }
1860
1861         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1862                 seq_printf(seq, ",nocompress_extension=%s",
1863                         F2FS_OPTION(sbi).noextensions[i]);
1864         }
1865
1866         if (F2FS_OPTION(sbi).compress_chksum)
1867                 seq_puts(seq, ",compress_chksum");
1868
1869         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1870                 seq_printf(seq, ",compress_mode=%s", "fs");
1871         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1872                 seq_printf(seq, ",compress_mode=%s", "user");
1873
1874         if (test_opt(sbi, COMPRESS_CACHE))
1875                 seq_puts(seq, ",compress_cache");
1876 }
1877 #endif
1878
1879 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1880 {
1881         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1882
1883         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1884                 seq_printf(seq, ",background_gc=%s", "sync");
1885         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1886                 seq_printf(seq, ",background_gc=%s", "on");
1887         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1888                 seq_printf(seq, ",background_gc=%s", "off");
1889
1890         if (test_opt(sbi, GC_MERGE))
1891                 seq_puts(seq, ",gc_merge");
1892
1893         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1894                 seq_puts(seq, ",disable_roll_forward");
1895         if (test_opt(sbi, NORECOVERY))
1896                 seq_puts(seq, ",norecovery");
1897         if (test_opt(sbi, DISCARD))
1898                 seq_puts(seq, ",discard");
1899         else
1900                 seq_puts(seq, ",nodiscard");
1901         if (test_opt(sbi, NOHEAP))
1902                 seq_puts(seq, ",no_heap");
1903         else
1904                 seq_puts(seq, ",heap");
1905 #ifdef CONFIG_F2FS_FS_XATTR
1906         if (test_opt(sbi, XATTR_USER))
1907                 seq_puts(seq, ",user_xattr");
1908         else
1909                 seq_puts(seq, ",nouser_xattr");
1910         if (test_opt(sbi, INLINE_XATTR))
1911                 seq_puts(seq, ",inline_xattr");
1912         else
1913                 seq_puts(seq, ",noinline_xattr");
1914         if (test_opt(sbi, INLINE_XATTR_SIZE))
1915                 seq_printf(seq, ",inline_xattr_size=%u",
1916                                         F2FS_OPTION(sbi).inline_xattr_size);
1917 #endif
1918 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1919         if (test_opt(sbi, POSIX_ACL))
1920                 seq_puts(seq, ",acl");
1921         else
1922                 seq_puts(seq, ",noacl");
1923 #endif
1924         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1925                 seq_puts(seq, ",disable_ext_identify");
1926         if (test_opt(sbi, INLINE_DATA))
1927                 seq_puts(seq, ",inline_data");
1928         else
1929                 seq_puts(seq, ",noinline_data");
1930         if (test_opt(sbi, INLINE_DENTRY))
1931                 seq_puts(seq, ",inline_dentry");
1932         else
1933                 seq_puts(seq, ",noinline_dentry");
1934         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1935                 seq_puts(seq, ",flush_merge");
1936         if (test_opt(sbi, NOBARRIER))
1937                 seq_puts(seq, ",nobarrier");
1938         if (test_opt(sbi, FASTBOOT))
1939                 seq_puts(seq, ",fastboot");
1940         if (test_opt(sbi, EXTENT_CACHE))
1941                 seq_puts(seq, ",extent_cache");
1942         else
1943                 seq_puts(seq, ",noextent_cache");
1944         if (test_opt(sbi, DATA_FLUSH))
1945                 seq_puts(seq, ",data_flush");
1946
1947         seq_puts(seq, ",mode=");
1948         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1949                 seq_puts(seq, "adaptive");
1950         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1951                 seq_puts(seq, "lfs");
1952         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
1953                 seq_puts(seq, "fragment:segment");
1954         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
1955                 seq_puts(seq, "fragment:block");
1956         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1957         if (test_opt(sbi, RESERVE_ROOT))
1958                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1959                                 F2FS_OPTION(sbi).root_reserved_blocks,
1960                                 from_kuid_munged(&init_user_ns,
1961                                         F2FS_OPTION(sbi).s_resuid),
1962                                 from_kgid_munged(&init_user_ns,
1963                                         F2FS_OPTION(sbi).s_resgid));
1964         if (F2FS_IO_SIZE_BITS(sbi))
1965                 seq_printf(seq, ",io_bits=%u",
1966                                 F2FS_OPTION(sbi).write_io_size_bits);
1967 #ifdef CONFIG_F2FS_FAULT_INJECTION
1968         if (test_opt(sbi, FAULT_INJECTION)) {
1969                 seq_printf(seq, ",fault_injection=%u",
1970                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1971                 seq_printf(seq, ",fault_type=%u",
1972                                 F2FS_OPTION(sbi).fault_info.inject_type);
1973         }
1974 #endif
1975 #ifdef CONFIG_QUOTA
1976         if (test_opt(sbi, QUOTA))
1977                 seq_puts(seq, ",quota");
1978         if (test_opt(sbi, USRQUOTA))
1979                 seq_puts(seq, ",usrquota");
1980         if (test_opt(sbi, GRPQUOTA))
1981                 seq_puts(seq, ",grpquota");
1982         if (test_opt(sbi, PRJQUOTA))
1983                 seq_puts(seq, ",prjquota");
1984 #endif
1985         f2fs_show_quota_options(seq, sbi->sb);
1986
1987         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1988
1989         if (sbi->sb->s_flags & SB_INLINECRYPT)
1990                 seq_puts(seq, ",inlinecrypt");
1991
1992         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1993                 seq_printf(seq, ",alloc_mode=%s", "default");
1994         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1995                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1996
1997         if (test_opt(sbi, DISABLE_CHECKPOINT))
1998                 seq_printf(seq, ",checkpoint=disable:%u",
1999                                 F2FS_OPTION(sbi).unusable_cap);
2000         if (test_opt(sbi, MERGE_CHECKPOINT))
2001                 seq_puts(seq, ",checkpoint_merge");
2002         else
2003                 seq_puts(seq, ",nocheckpoint_merge");
2004         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2005                 seq_printf(seq, ",fsync_mode=%s", "posix");
2006         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2007                 seq_printf(seq, ",fsync_mode=%s", "strict");
2008         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2009                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2010
2011 #ifdef CONFIG_F2FS_FS_COMPRESSION
2012         f2fs_show_compress_options(seq, sbi->sb);
2013 #endif
2014
2015         if (test_opt(sbi, ATGC))
2016                 seq_puts(seq, ",atgc");
2017
2018         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2019                 seq_printf(seq, ",discard_unit=%s", "block");
2020         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2021                 seq_printf(seq, ",discard_unit=%s", "segment");
2022         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2023                 seq_printf(seq, ",discard_unit=%s", "section");
2024
2025         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2026                 seq_printf(seq, ",memory=%s", "normal");
2027         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2028                 seq_printf(seq, ",memory=%s", "low");
2029
2030         return 0;
2031 }
2032
2033 static void default_options(struct f2fs_sb_info *sbi)
2034 {
2035         /* init some FS parameters */
2036         if (f2fs_sb_has_readonly(sbi))
2037                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2038         else
2039                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2040
2041         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2042         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2043         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2044         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2045         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2046         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2047         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2048         F2FS_OPTION(sbi).compress_ext_cnt = 0;
2049         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2050         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2051         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2052
2053         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2054
2055         set_opt(sbi, INLINE_XATTR);
2056         set_opt(sbi, INLINE_DATA);
2057         set_opt(sbi, INLINE_DENTRY);
2058         set_opt(sbi, EXTENT_CACHE);
2059         set_opt(sbi, NOHEAP);
2060         clear_opt(sbi, DISABLE_CHECKPOINT);
2061         set_opt(sbi, MERGE_CHECKPOINT);
2062         F2FS_OPTION(sbi).unusable_cap = 0;
2063         sbi->sb->s_flags |= SB_LAZYTIME;
2064         set_opt(sbi, FLUSH_MERGE);
2065         if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2066                 set_opt(sbi, DISCARD);
2067         if (f2fs_sb_has_blkzoned(sbi)) {
2068                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2069                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2070         } else {
2071                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2072                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2073         }
2074
2075 #ifdef CONFIG_F2FS_FS_XATTR
2076         set_opt(sbi, XATTR_USER);
2077 #endif
2078 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2079         set_opt(sbi, POSIX_ACL);
2080 #endif
2081
2082         f2fs_build_fault_attr(sbi, 0, 0);
2083 }
2084
2085 #ifdef CONFIG_QUOTA
2086 static int f2fs_enable_quotas(struct super_block *sb);
2087 #endif
2088
2089 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2090 {
2091         unsigned int s_flags = sbi->sb->s_flags;
2092         struct cp_control cpc;
2093         unsigned int gc_mode = sbi->gc_mode;
2094         int err = 0;
2095         int ret;
2096         block_t unusable;
2097
2098         if (s_flags & SB_RDONLY) {
2099                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2100                 return -EINVAL;
2101         }
2102         sbi->sb->s_flags |= SB_ACTIVE;
2103
2104         /* check if we need more GC first */
2105         unusable = f2fs_get_unusable_blocks(sbi);
2106         if (!f2fs_disable_cp_again(sbi, unusable))
2107                 goto skip_gc;
2108
2109         f2fs_update_time(sbi, DISABLE_TIME);
2110
2111         sbi->gc_mode = GC_URGENT_HIGH;
2112
2113         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2114                 struct f2fs_gc_control gc_control = {
2115                         .victim_segno = NULL_SEGNO,
2116                         .init_gc_type = FG_GC,
2117                         .should_migrate_blocks = false,
2118                         .err_gc_skipped = true,
2119                         .nr_free_secs = 1 };
2120
2121                 f2fs_down_write(&sbi->gc_lock);
2122                 err = f2fs_gc(sbi, &gc_control);
2123                 if (err == -ENODATA) {
2124                         err = 0;
2125                         break;
2126                 }
2127                 if (err && err != -EAGAIN)
2128                         break;
2129         }
2130
2131         ret = sync_filesystem(sbi->sb);
2132         if (ret || err) {
2133                 err = ret ? ret : err;
2134                 goto restore_flag;
2135         }
2136
2137         unusable = f2fs_get_unusable_blocks(sbi);
2138         if (f2fs_disable_cp_again(sbi, unusable)) {
2139                 err = -EAGAIN;
2140                 goto restore_flag;
2141         }
2142
2143 skip_gc:
2144         f2fs_down_write(&sbi->gc_lock);
2145         cpc.reason = CP_PAUSE;
2146         set_sbi_flag(sbi, SBI_CP_DISABLED);
2147         err = f2fs_write_checkpoint(sbi, &cpc);
2148         if (err)
2149                 goto out_unlock;
2150
2151         spin_lock(&sbi->stat_lock);
2152         sbi->unusable_block_count = unusable;
2153         spin_unlock(&sbi->stat_lock);
2154
2155 out_unlock:
2156         f2fs_up_write(&sbi->gc_lock);
2157 restore_flag:
2158         sbi->gc_mode = gc_mode;
2159         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2160         return err;
2161 }
2162
2163 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2164 {
2165         int retry = DEFAULT_RETRY_IO_COUNT;
2166
2167         /* we should flush all the data to keep data consistency */
2168         do {
2169                 sync_inodes_sb(sbi->sb);
2170                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2171         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2172
2173         if (unlikely(retry < 0))
2174                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2175
2176         f2fs_down_write(&sbi->gc_lock);
2177         f2fs_dirty_to_prefree(sbi);
2178
2179         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2180         set_sbi_flag(sbi, SBI_IS_DIRTY);
2181         f2fs_up_write(&sbi->gc_lock);
2182
2183         f2fs_sync_fs(sbi->sb, 1);
2184 }
2185
2186 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2187 {
2188         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2189         struct f2fs_mount_info org_mount_opt;
2190         unsigned long old_sb_flags;
2191         int err;
2192         bool need_restart_gc = false, need_stop_gc = false;
2193         bool need_restart_ckpt = false, need_stop_ckpt = false;
2194         bool need_restart_flush = false, need_stop_flush = false;
2195         bool need_restart_discard = false, need_stop_discard = false;
2196         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2197         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2198         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2199         bool no_atgc = !test_opt(sbi, ATGC);
2200         bool no_discard = !test_opt(sbi, DISCARD);
2201         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2202         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2203         struct discard_cmd_control *dcc;
2204 #ifdef CONFIG_QUOTA
2205         int i, j;
2206 #endif
2207
2208         /*
2209          * Save the old mount options in case we
2210          * need to restore them.
2211          */
2212         org_mount_opt = sbi->mount_opt;
2213         old_sb_flags = sb->s_flags;
2214
2215 #ifdef CONFIG_QUOTA
2216         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2217         for (i = 0; i < MAXQUOTAS; i++) {
2218                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2219                         org_mount_opt.s_qf_names[i] =
2220                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2221                                 GFP_KERNEL);
2222                         if (!org_mount_opt.s_qf_names[i]) {
2223                                 for (j = 0; j < i; j++)
2224                                         kfree(org_mount_opt.s_qf_names[j]);
2225                                 return -ENOMEM;
2226                         }
2227                 } else {
2228                         org_mount_opt.s_qf_names[i] = NULL;
2229                 }
2230         }
2231 #endif
2232
2233         /* recover superblocks we couldn't write due to previous RO mount */
2234         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2235                 err = f2fs_commit_super(sbi, false);
2236                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2237                           err);
2238                 if (!err)
2239                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2240         }
2241
2242         default_options(sbi);
2243
2244         /* parse mount options */
2245         err = parse_options(sb, data, true);
2246         if (err)
2247                 goto restore_opts;
2248
2249         /*
2250          * Previous and new state of filesystem is RO,
2251          * so skip checking GC and FLUSH_MERGE conditions.
2252          */
2253         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2254                 goto skip;
2255
2256         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2257                 err = -EROFS;
2258                 goto restore_opts;
2259         }
2260
2261 #ifdef CONFIG_QUOTA
2262         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2263                 err = dquot_suspend(sb, -1);
2264                 if (err < 0)
2265                         goto restore_opts;
2266         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2267                 /* dquot_resume needs RW */
2268                 sb->s_flags &= ~SB_RDONLY;
2269                 if (sb_any_quota_suspended(sb)) {
2270                         dquot_resume(sb, -1);
2271                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2272                         err = f2fs_enable_quotas(sb);
2273                         if (err)
2274                                 goto restore_opts;
2275                 }
2276         }
2277 #endif
2278         /* disallow enable atgc dynamically */
2279         if (no_atgc == !!test_opt(sbi, ATGC)) {
2280                 err = -EINVAL;
2281                 f2fs_warn(sbi, "switch atgc option is not allowed");
2282                 goto restore_opts;
2283         }
2284
2285         /* disallow enable/disable extent_cache dynamically */
2286         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2287                 err = -EINVAL;
2288                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2289                 goto restore_opts;
2290         }
2291
2292         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2293                 err = -EINVAL;
2294                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2295                 goto restore_opts;
2296         }
2297
2298         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2299                 err = -EINVAL;
2300                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2301                 goto restore_opts;
2302         }
2303
2304         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2305                 err = -EINVAL;
2306                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2307                 goto restore_opts;
2308         }
2309
2310         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2311                 err = -EINVAL;
2312                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2313                 goto restore_opts;
2314         }
2315
2316         /*
2317          * We stop the GC thread if FS is mounted as RO
2318          * or if background_gc = off is passed in mount
2319          * option. Also sync the filesystem.
2320          */
2321         if ((*flags & SB_RDONLY) ||
2322                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2323                         !test_opt(sbi, GC_MERGE))) {
2324                 if (sbi->gc_thread) {
2325                         f2fs_stop_gc_thread(sbi);
2326                         need_restart_gc = true;
2327                 }
2328         } else if (!sbi->gc_thread) {
2329                 err = f2fs_start_gc_thread(sbi);
2330                 if (err)
2331                         goto restore_opts;
2332                 need_stop_gc = true;
2333         }
2334
2335         if (*flags & SB_RDONLY) {
2336                 sync_inodes_sb(sb);
2337
2338                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2339                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2340                 f2fs_sync_fs(sb, 1);
2341                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2342         }
2343
2344         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2345                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2346                 f2fs_stop_ckpt_thread(sbi);
2347                 need_restart_ckpt = true;
2348         } else {
2349                 err = f2fs_start_ckpt_thread(sbi);
2350                 if (err) {
2351                         f2fs_err(sbi,
2352                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2353                             err);
2354                         goto restore_gc;
2355                 }
2356                 need_stop_ckpt = true;
2357         }
2358
2359         /*
2360          * We stop issue flush thread if FS is mounted as RO
2361          * or if flush_merge is not passed in mount option.
2362          */
2363         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2364                 clear_opt(sbi, FLUSH_MERGE);
2365                 f2fs_destroy_flush_cmd_control(sbi, false);
2366                 need_restart_flush = true;
2367         } else {
2368                 err = f2fs_create_flush_cmd_control(sbi);
2369                 if (err)
2370                         goto restore_ckpt;
2371                 need_stop_flush = true;
2372         }
2373
2374         if (no_discard == !!test_opt(sbi, DISCARD)) {
2375                 if (test_opt(sbi, DISCARD)) {
2376                         err = f2fs_start_discard_thread(sbi);
2377                         if (err)
2378                                 goto restore_flush;
2379                         need_stop_discard = true;
2380                 } else {
2381                         dcc = SM_I(sbi)->dcc_info;
2382                         f2fs_stop_discard_thread(sbi);
2383                         if (atomic_read(&dcc->discard_cmd_cnt))
2384                                 f2fs_issue_discard_timeout(sbi);
2385                         need_restart_discard = true;
2386                 }
2387         }
2388
2389         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2390                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2391                         err = f2fs_disable_checkpoint(sbi);
2392                         if (err)
2393                                 goto restore_discard;
2394                 } else {
2395                         f2fs_enable_checkpoint(sbi);
2396                 }
2397         }
2398
2399 skip:
2400 #ifdef CONFIG_QUOTA
2401         /* Release old quota file names */
2402         for (i = 0; i < MAXQUOTAS; i++)
2403                 kfree(org_mount_opt.s_qf_names[i]);
2404 #endif
2405         /* Update the POSIXACL Flag */
2406         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2407                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2408
2409         limit_reserve_root(sbi);
2410         adjust_unusable_cap_perc(sbi);
2411         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2412         return 0;
2413 restore_discard:
2414         if (need_restart_discard) {
2415                 if (f2fs_start_discard_thread(sbi))
2416                         f2fs_warn(sbi, "discard has been stopped");
2417         } else if (need_stop_discard) {
2418                 f2fs_stop_discard_thread(sbi);
2419         }
2420 restore_flush:
2421         if (need_restart_flush) {
2422                 if (f2fs_create_flush_cmd_control(sbi))
2423                         f2fs_warn(sbi, "background flush thread has stopped");
2424         } else if (need_stop_flush) {
2425                 clear_opt(sbi, FLUSH_MERGE);
2426                 f2fs_destroy_flush_cmd_control(sbi, false);
2427         }
2428 restore_ckpt:
2429         if (need_restart_ckpt) {
2430                 if (f2fs_start_ckpt_thread(sbi))
2431                         f2fs_warn(sbi, "background ckpt thread has stopped");
2432         } else if (need_stop_ckpt) {
2433                 f2fs_stop_ckpt_thread(sbi);
2434         }
2435 restore_gc:
2436         if (need_restart_gc) {
2437                 if (f2fs_start_gc_thread(sbi))
2438                         f2fs_warn(sbi, "background gc thread has stopped");
2439         } else if (need_stop_gc) {
2440                 f2fs_stop_gc_thread(sbi);
2441         }
2442 restore_opts:
2443 #ifdef CONFIG_QUOTA
2444         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2445         for (i = 0; i < MAXQUOTAS; i++) {
2446                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2447                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2448         }
2449 #endif
2450         sbi->mount_opt = org_mount_opt;
2451         sb->s_flags = old_sb_flags;
2452         return err;
2453 }
2454
2455 #ifdef CONFIG_QUOTA
2456 /* Read data from quotafile */
2457 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2458                                size_t len, loff_t off)
2459 {
2460         struct inode *inode = sb_dqopt(sb)->files[type];
2461         struct address_space *mapping = inode->i_mapping;
2462         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2463         int offset = off & (sb->s_blocksize - 1);
2464         int tocopy;
2465         size_t toread;
2466         loff_t i_size = i_size_read(inode);
2467         struct page *page;
2468         char *kaddr;
2469
2470         if (off > i_size)
2471                 return 0;
2472
2473         if (off + len > i_size)
2474                 len = i_size - off;
2475         toread = len;
2476         while (toread > 0) {
2477                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2478 repeat:
2479                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2480                 if (IS_ERR(page)) {
2481                         if (PTR_ERR(page) == -ENOMEM) {
2482                                 memalloc_retry_wait(GFP_NOFS);
2483                                 goto repeat;
2484                         }
2485                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2486                         return PTR_ERR(page);
2487                 }
2488
2489                 lock_page(page);
2490
2491                 if (unlikely(page->mapping != mapping)) {
2492                         f2fs_put_page(page, 1);
2493                         goto repeat;
2494                 }
2495                 if (unlikely(!PageUptodate(page))) {
2496                         f2fs_put_page(page, 1);
2497                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2498                         return -EIO;
2499                 }
2500
2501                 kaddr = kmap_atomic(page);
2502                 memcpy(data, kaddr + offset, tocopy);
2503                 kunmap_atomic(kaddr);
2504                 f2fs_put_page(page, 1);
2505
2506                 offset = 0;
2507                 toread -= tocopy;
2508                 data += tocopy;
2509                 blkidx++;
2510         }
2511         return len;
2512 }
2513
2514 /* Write to quotafile */
2515 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2516                                 const char *data, size_t len, loff_t off)
2517 {
2518         struct inode *inode = sb_dqopt(sb)->files[type];
2519         struct address_space *mapping = inode->i_mapping;
2520         const struct address_space_operations *a_ops = mapping->a_ops;
2521         int offset = off & (sb->s_blocksize - 1);
2522         size_t towrite = len;
2523         struct page *page;
2524         void *fsdata = NULL;
2525         char *kaddr;
2526         int err = 0;
2527         int tocopy;
2528
2529         while (towrite > 0) {
2530                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2531                                                                 towrite);
2532 retry:
2533                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2534                                                         &page, &fsdata);
2535                 if (unlikely(err)) {
2536                         if (err == -ENOMEM) {
2537                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2538                                 goto retry;
2539                         }
2540                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2541                         break;
2542                 }
2543
2544                 kaddr = kmap_atomic(page);
2545                 memcpy(kaddr + offset, data, tocopy);
2546                 kunmap_atomic(kaddr);
2547                 flush_dcache_page(page);
2548
2549                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2550                                                 page, fsdata);
2551                 offset = 0;
2552                 towrite -= tocopy;
2553                 off += tocopy;
2554                 data += tocopy;
2555                 cond_resched();
2556         }
2557
2558         if (len == towrite)
2559                 return err;
2560         inode->i_mtime = inode->i_ctime = current_time(inode);
2561         f2fs_mark_inode_dirty_sync(inode, false);
2562         return len - towrite;
2563 }
2564
2565 int f2fs_dquot_initialize(struct inode *inode)
2566 {
2567         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2568                 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2569                 return -ESRCH;
2570         }
2571
2572         return dquot_initialize(inode);
2573 }
2574
2575 static struct dquot **f2fs_get_dquots(struct inode *inode)
2576 {
2577         return F2FS_I(inode)->i_dquot;
2578 }
2579
2580 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2581 {
2582         return &F2FS_I(inode)->i_reserved_quota;
2583 }
2584
2585 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2586 {
2587         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2588                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2589                 return 0;
2590         }
2591
2592         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2593                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2594 }
2595
2596 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2597 {
2598         int enabled = 0;
2599         int i, err;
2600
2601         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2602                 err = f2fs_enable_quotas(sbi->sb);
2603                 if (err) {
2604                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2605                         return 0;
2606                 }
2607                 return 1;
2608         }
2609
2610         for (i = 0; i < MAXQUOTAS; i++) {
2611                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2612                         err = f2fs_quota_on_mount(sbi, i);
2613                         if (!err) {
2614                                 enabled = 1;
2615                                 continue;
2616                         }
2617                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2618                                  err, i);
2619                 }
2620         }
2621         return enabled;
2622 }
2623
2624 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2625                              unsigned int flags)
2626 {
2627         struct inode *qf_inode;
2628         unsigned long qf_inum;
2629         int err;
2630
2631         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2632
2633         qf_inum = f2fs_qf_ino(sb, type);
2634         if (!qf_inum)
2635                 return -EPERM;
2636
2637         qf_inode = f2fs_iget(sb, qf_inum);
2638         if (IS_ERR(qf_inode)) {
2639                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2640                 return PTR_ERR(qf_inode);
2641         }
2642
2643         /* Don't account quota for quota files to avoid recursion */
2644         qf_inode->i_flags |= S_NOQUOTA;
2645         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2646         iput(qf_inode);
2647         return err;
2648 }
2649
2650 static int f2fs_enable_quotas(struct super_block *sb)
2651 {
2652         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2653         int type, err = 0;
2654         unsigned long qf_inum;
2655         bool quota_mopt[MAXQUOTAS] = {
2656                 test_opt(sbi, USRQUOTA),
2657                 test_opt(sbi, GRPQUOTA),
2658                 test_opt(sbi, PRJQUOTA),
2659         };
2660
2661         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2662                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2663                 return 0;
2664         }
2665
2666         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2667
2668         for (type = 0; type < MAXQUOTAS; type++) {
2669                 qf_inum = f2fs_qf_ino(sb, type);
2670                 if (qf_inum) {
2671                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2672                                 DQUOT_USAGE_ENABLED |
2673                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2674                         if (err) {
2675                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2676                                          type, err);
2677                                 for (type--; type >= 0; type--)
2678                                         dquot_quota_off(sb, type);
2679                                 set_sbi_flag(F2FS_SB(sb),
2680                                                 SBI_QUOTA_NEED_REPAIR);
2681                                 return err;
2682                         }
2683                 }
2684         }
2685         return 0;
2686 }
2687
2688 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2689 {
2690         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2691         struct address_space *mapping = dqopt->files[type]->i_mapping;
2692         int ret = 0;
2693
2694         ret = dquot_writeback_dquots(sbi->sb, type);
2695         if (ret)
2696                 goto out;
2697
2698         ret = filemap_fdatawrite(mapping);
2699         if (ret)
2700                 goto out;
2701
2702         /* if we are using journalled quota */
2703         if (is_journalled_quota(sbi))
2704                 goto out;
2705
2706         ret = filemap_fdatawait(mapping);
2707
2708         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2709 out:
2710         if (ret)
2711                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2712         return ret;
2713 }
2714
2715 int f2fs_quota_sync(struct super_block *sb, int type)
2716 {
2717         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2718         struct quota_info *dqopt = sb_dqopt(sb);
2719         int cnt;
2720         int ret = 0;
2721
2722         /*
2723          * Now when everything is written we can discard the pagecache so
2724          * that userspace sees the changes.
2725          */
2726         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2727
2728                 if (type != -1 && cnt != type)
2729                         continue;
2730
2731                 if (!sb_has_quota_active(sb, cnt))
2732                         continue;
2733
2734                 if (!f2fs_sb_has_quota_ino(sbi))
2735                         inode_lock(dqopt->files[cnt]);
2736
2737                 /*
2738                  * do_quotactl
2739                  *  f2fs_quota_sync
2740                  *  f2fs_down_read(quota_sem)
2741                  *  dquot_writeback_dquots()
2742                  *  f2fs_dquot_commit
2743                  *                            block_operation
2744                  *                            f2fs_down_read(quota_sem)
2745                  */
2746                 f2fs_lock_op(sbi);
2747                 f2fs_down_read(&sbi->quota_sem);
2748
2749                 ret = f2fs_quota_sync_file(sbi, cnt);
2750
2751                 f2fs_up_read(&sbi->quota_sem);
2752                 f2fs_unlock_op(sbi);
2753
2754                 if (!f2fs_sb_has_quota_ino(sbi))
2755                         inode_unlock(dqopt->files[cnt]);
2756
2757                 if (ret)
2758                         break;
2759         }
2760         return ret;
2761 }
2762
2763 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2764                                                         const struct path *path)
2765 {
2766         struct inode *inode;
2767         int err;
2768
2769         /* if quota sysfile exists, deny enabling quota with specific file */
2770         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2771                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2772                 return -EBUSY;
2773         }
2774
2775         err = f2fs_quota_sync(sb, type);
2776         if (err)
2777                 return err;
2778
2779         err = dquot_quota_on(sb, type, format_id, path);
2780         if (err)
2781                 return err;
2782
2783         inode = d_inode(path->dentry);
2784
2785         inode_lock(inode);
2786         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2787         f2fs_set_inode_flags(inode);
2788         inode_unlock(inode);
2789         f2fs_mark_inode_dirty_sync(inode, false);
2790
2791         return 0;
2792 }
2793
2794 static int __f2fs_quota_off(struct super_block *sb, int type)
2795 {
2796         struct inode *inode = sb_dqopt(sb)->files[type];
2797         int err;
2798
2799         if (!inode || !igrab(inode))
2800                 return dquot_quota_off(sb, type);
2801
2802         err = f2fs_quota_sync(sb, type);
2803         if (err)
2804                 goto out_put;
2805
2806         err = dquot_quota_off(sb, type);
2807         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2808                 goto out_put;
2809
2810         inode_lock(inode);
2811         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2812         f2fs_set_inode_flags(inode);
2813         inode_unlock(inode);
2814         f2fs_mark_inode_dirty_sync(inode, false);
2815 out_put:
2816         iput(inode);
2817         return err;
2818 }
2819
2820 static int f2fs_quota_off(struct super_block *sb, int type)
2821 {
2822         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2823         int err;
2824
2825         err = __f2fs_quota_off(sb, type);
2826
2827         /*
2828          * quotactl can shutdown journalled quota, result in inconsistence
2829          * between quota record and fs data by following updates, tag the
2830          * flag to let fsck be aware of it.
2831          */
2832         if (is_journalled_quota(sbi))
2833                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2834         return err;
2835 }
2836
2837 void f2fs_quota_off_umount(struct super_block *sb)
2838 {
2839         int type;
2840         int err;
2841
2842         for (type = 0; type < MAXQUOTAS; type++) {
2843                 err = __f2fs_quota_off(sb, type);
2844                 if (err) {
2845                         int ret = dquot_quota_off(sb, type);
2846
2847                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2848                                  type, err, ret);
2849                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2850                 }
2851         }
2852         /*
2853          * In case of checkpoint=disable, we must flush quota blocks.
2854          * This can cause NULL exception for node_inode in end_io, since
2855          * put_super already dropped it.
2856          */
2857         sync_filesystem(sb);
2858 }
2859
2860 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2861 {
2862         struct quota_info *dqopt = sb_dqopt(sb);
2863         int type;
2864
2865         for (type = 0; type < MAXQUOTAS; type++) {
2866                 if (!dqopt->files[type])
2867                         continue;
2868                 f2fs_inode_synced(dqopt->files[type]);
2869         }
2870 }
2871
2872 static int f2fs_dquot_commit(struct dquot *dquot)
2873 {
2874         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2875         int ret;
2876
2877         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2878         ret = dquot_commit(dquot);
2879         if (ret < 0)
2880                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2881         f2fs_up_read(&sbi->quota_sem);
2882         return ret;
2883 }
2884
2885 static int f2fs_dquot_acquire(struct dquot *dquot)
2886 {
2887         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2888         int ret;
2889
2890         f2fs_down_read(&sbi->quota_sem);
2891         ret = dquot_acquire(dquot);
2892         if (ret < 0)
2893                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2894         f2fs_up_read(&sbi->quota_sem);
2895         return ret;
2896 }
2897
2898 static int f2fs_dquot_release(struct dquot *dquot)
2899 {
2900         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2901         int ret = dquot_release(dquot);
2902
2903         if (ret < 0)
2904                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2905         return ret;
2906 }
2907
2908 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2909 {
2910         struct super_block *sb = dquot->dq_sb;
2911         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2912         int ret = dquot_mark_dquot_dirty(dquot);
2913
2914         /* if we are using journalled quota */
2915         if (is_journalled_quota(sbi))
2916                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2917
2918         return ret;
2919 }
2920
2921 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2922 {
2923         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2924         int ret = dquot_commit_info(sb, type);
2925
2926         if (ret < 0)
2927                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2928         return ret;
2929 }
2930
2931 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2932 {
2933         *projid = F2FS_I(inode)->i_projid;
2934         return 0;
2935 }
2936
2937 static const struct dquot_operations f2fs_quota_operations = {
2938         .get_reserved_space = f2fs_get_reserved_space,
2939         .write_dquot    = f2fs_dquot_commit,
2940         .acquire_dquot  = f2fs_dquot_acquire,
2941         .release_dquot  = f2fs_dquot_release,
2942         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2943         .write_info     = f2fs_dquot_commit_info,
2944         .alloc_dquot    = dquot_alloc,
2945         .destroy_dquot  = dquot_destroy,
2946         .get_projid     = f2fs_get_projid,
2947         .get_next_id    = dquot_get_next_id,
2948 };
2949
2950 static const struct quotactl_ops f2fs_quotactl_ops = {
2951         .quota_on       = f2fs_quota_on,
2952         .quota_off      = f2fs_quota_off,
2953         .quota_sync     = f2fs_quota_sync,
2954         .get_state      = dquot_get_state,
2955         .set_info       = dquot_set_dqinfo,
2956         .get_dqblk      = dquot_get_dqblk,
2957         .set_dqblk      = dquot_set_dqblk,
2958         .get_nextdqblk  = dquot_get_next_dqblk,
2959 };
2960 #else
2961 int f2fs_dquot_initialize(struct inode *inode)
2962 {
2963         return 0;
2964 }
2965
2966 int f2fs_quota_sync(struct super_block *sb, int type)
2967 {
2968         return 0;
2969 }
2970
2971 void f2fs_quota_off_umount(struct super_block *sb)
2972 {
2973 }
2974 #endif
2975
2976 static const struct super_operations f2fs_sops = {
2977         .alloc_inode    = f2fs_alloc_inode,
2978         .free_inode     = f2fs_free_inode,
2979         .drop_inode     = f2fs_drop_inode,
2980         .write_inode    = f2fs_write_inode,
2981         .dirty_inode    = f2fs_dirty_inode,
2982         .show_options   = f2fs_show_options,
2983 #ifdef CONFIG_QUOTA
2984         .quota_read     = f2fs_quota_read,
2985         .quota_write    = f2fs_quota_write,
2986         .get_dquots     = f2fs_get_dquots,
2987 #endif
2988         .evict_inode    = f2fs_evict_inode,
2989         .put_super      = f2fs_put_super,
2990         .sync_fs        = f2fs_sync_fs,
2991         .freeze_fs      = f2fs_freeze,
2992         .unfreeze_fs    = f2fs_unfreeze,
2993         .statfs         = f2fs_statfs,
2994         .remount_fs     = f2fs_remount,
2995 };
2996
2997 #ifdef CONFIG_FS_ENCRYPTION
2998 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2999 {
3000         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3001                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3002                                 ctx, len, NULL);
3003 }
3004
3005 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3006                                                         void *fs_data)
3007 {
3008         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3009
3010         /*
3011          * Encrypting the root directory is not allowed because fsck
3012          * expects lost+found directory to exist and remain unencrypted
3013          * if LOST_FOUND feature is enabled.
3014          *
3015          */
3016         if (f2fs_sb_has_lost_found(sbi) &&
3017                         inode->i_ino == F2FS_ROOT_INO(sbi))
3018                 return -EPERM;
3019
3020         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3021                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3022                                 ctx, len, fs_data, XATTR_CREATE);
3023 }
3024
3025 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3026 {
3027         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3028 }
3029
3030 static bool f2fs_has_stable_inodes(struct super_block *sb)
3031 {
3032         return true;
3033 }
3034
3035 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3036                                        int *ino_bits_ret, int *lblk_bits_ret)
3037 {
3038         *ino_bits_ret = 8 * sizeof(nid_t);
3039         *lblk_bits_ret = 8 * sizeof(block_t);
3040 }
3041
3042 static int f2fs_get_num_devices(struct super_block *sb)
3043 {
3044         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3045
3046         if (f2fs_is_multi_device(sbi))
3047                 return sbi->s_ndevs;
3048         return 1;
3049 }
3050
3051 static void f2fs_get_devices(struct super_block *sb,
3052                              struct request_queue **devs)
3053 {
3054         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3055         int i;
3056
3057         for (i = 0; i < sbi->s_ndevs; i++)
3058                 devs[i] = bdev_get_queue(FDEV(i).bdev);
3059 }
3060
3061 static const struct fscrypt_operations f2fs_cryptops = {
3062         .key_prefix             = "f2fs:",
3063         .get_context            = f2fs_get_context,
3064         .set_context            = f2fs_set_context,
3065         .get_dummy_policy       = f2fs_get_dummy_policy,
3066         .empty_dir              = f2fs_empty_dir,
3067         .has_stable_inodes      = f2fs_has_stable_inodes,
3068         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3069         .get_num_devices        = f2fs_get_num_devices,
3070         .get_devices            = f2fs_get_devices,
3071 };
3072 #endif
3073
3074 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3075                 u64 ino, u32 generation)
3076 {
3077         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3078         struct inode *inode;
3079
3080         if (f2fs_check_nid_range(sbi, ino))
3081                 return ERR_PTR(-ESTALE);
3082
3083         /*
3084          * f2fs_iget isn't quite right if the inode is currently unallocated!
3085          * However f2fs_iget currently does appropriate checks to handle stale
3086          * inodes so everything is OK.
3087          */
3088         inode = f2fs_iget(sb, ino);
3089         if (IS_ERR(inode))
3090                 return ERR_CAST(inode);
3091         if (unlikely(generation && inode->i_generation != generation)) {
3092                 /* we didn't find the right inode.. */
3093                 iput(inode);
3094                 return ERR_PTR(-ESTALE);
3095         }
3096         return inode;
3097 }
3098
3099 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3100                 int fh_len, int fh_type)
3101 {
3102         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3103                                     f2fs_nfs_get_inode);
3104 }
3105
3106 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3107                 int fh_len, int fh_type)
3108 {
3109         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3110                                     f2fs_nfs_get_inode);
3111 }
3112
3113 static const struct export_operations f2fs_export_ops = {
3114         .fh_to_dentry = f2fs_fh_to_dentry,
3115         .fh_to_parent = f2fs_fh_to_parent,
3116         .get_parent = f2fs_get_parent,
3117 };
3118
3119 loff_t max_file_blocks(struct inode *inode)
3120 {
3121         loff_t result = 0;
3122         loff_t leaf_count;
3123
3124         /*
3125          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3126          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3127          * space in inode.i_addr, it will be more safe to reassign
3128          * result as zero.
3129          */
3130
3131         if (inode && f2fs_compressed_file(inode))
3132                 leaf_count = ADDRS_PER_BLOCK(inode);
3133         else
3134                 leaf_count = DEF_ADDRS_PER_BLOCK;
3135
3136         /* two direct node blocks */
3137         result += (leaf_count * 2);
3138
3139         /* two indirect node blocks */
3140         leaf_count *= NIDS_PER_BLOCK;
3141         result += (leaf_count * 2);
3142
3143         /* one double indirect node block */
3144         leaf_count *= NIDS_PER_BLOCK;
3145         result += leaf_count;
3146
3147         return result;
3148 }
3149
3150 static int __f2fs_commit_super(struct buffer_head *bh,
3151                         struct f2fs_super_block *super)
3152 {
3153         lock_buffer(bh);
3154         if (super)
3155                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3156         set_buffer_dirty(bh);
3157         unlock_buffer(bh);
3158
3159         /* it's rare case, we can do fua all the time */
3160         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3161 }
3162
3163 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3164                                         struct buffer_head *bh)
3165 {
3166         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3167                                         (bh->b_data + F2FS_SUPER_OFFSET);
3168         struct super_block *sb = sbi->sb;
3169         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3170         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3171         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3172         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3173         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3174         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3175         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3176         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3177         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3178         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3179         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3180         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3181         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3182         u64 main_end_blkaddr = main_blkaddr +
3183                                 (segment_count_main << log_blocks_per_seg);
3184         u64 seg_end_blkaddr = segment0_blkaddr +
3185                                 (segment_count << log_blocks_per_seg);
3186
3187         if (segment0_blkaddr != cp_blkaddr) {
3188                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3189                           segment0_blkaddr, cp_blkaddr);
3190                 return true;
3191         }
3192
3193         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3194                                                         sit_blkaddr) {
3195                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3196                           cp_blkaddr, sit_blkaddr,
3197                           segment_count_ckpt << log_blocks_per_seg);
3198                 return true;
3199         }
3200
3201         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3202                                                         nat_blkaddr) {
3203                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3204                           sit_blkaddr, nat_blkaddr,
3205                           segment_count_sit << log_blocks_per_seg);
3206                 return true;
3207         }
3208
3209         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3210                                                         ssa_blkaddr) {
3211                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3212                           nat_blkaddr, ssa_blkaddr,
3213                           segment_count_nat << log_blocks_per_seg);
3214                 return true;
3215         }
3216
3217         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3218                                                         main_blkaddr) {
3219                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3220                           ssa_blkaddr, main_blkaddr,
3221                           segment_count_ssa << log_blocks_per_seg);
3222                 return true;
3223         }
3224
3225         if (main_end_blkaddr > seg_end_blkaddr) {
3226                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3227                           main_blkaddr, seg_end_blkaddr,
3228                           segment_count_main << log_blocks_per_seg);
3229                 return true;
3230         } else if (main_end_blkaddr < seg_end_blkaddr) {
3231                 int err = 0;
3232                 char *res;
3233
3234                 /* fix in-memory information all the time */
3235                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3236                                 segment0_blkaddr) >> log_blocks_per_seg);
3237
3238                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3239                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3240                         res = "internally";
3241                 } else {
3242                         err = __f2fs_commit_super(bh, NULL);
3243                         res = err ? "failed" : "done";
3244                 }
3245                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3246                           res, main_blkaddr, seg_end_blkaddr,
3247                           segment_count_main << log_blocks_per_seg);
3248                 if (err)
3249                         return true;
3250         }
3251         return false;
3252 }
3253
3254 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3255                                 struct buffer_head *bh)
3256 {
3257         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3258         block_t total_sections, blocks_per_seg;
3259         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3260                                         (bh->b_data + F2FS_SUPER_OFFSET);
3261         size_t crc_offset = 0;
3262         __u32 crc = 0;
3263
3264         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3265                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3266                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3267                 return -EINVAL;
3268         }
3269
3270         /* Check checksum_offset and crc in superblock */
3271         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3272                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3273                 if (crc_offset !=
3274                         offsetof(struct f2fs_super_block, crc)) {
3275                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3276                                   crc_offset);
3277                         return -EFSCORRUPTED;
3278                 }
3279                 crc = le32_to_cpu(raw_super->crc);
3280                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3281                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3282                         return -EFSCORRUPTED;
3283                 }
3284         }
3285
3286         /* Currently, support only 4KB block size */
3287         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3288                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3289                           le32_to_cpu(raw_super->log_blocksize),
3290                           F2FS_BLKSIZE_BITS);
3291                 return -EFSCORRUPTED;
3292         }
3293
3294         /* check log blocks per segment */
3295         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3296                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3297                           le32_to_cpu(raw_super->log_blocks_per_seg));
3298                 return -EFSCORRUPTED;
3299         }
3300
3301         /* Currently, support 512/1024/2048/4096 bytes sector size */
3302         if (le32_to_cpu(raw_super->log_sectorsize) >
3303                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3304                 le32_to_cpu(raw_super->log_sectorsize) <
3305                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3306                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3307                           le32_to_cpu(raw_super->log_sectorsize));
3308                 return -EFSCORRUPTED;
3309         }
3310         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3311                 le32_to_cpu(raw_super->log_sectorsize) !=
3312                         F2FS_MAX_LOG_SECTOR_SIZE) {
3313                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3314                           le32_to_cpu(raw_super->log_sectors_per_block),
3315                           le32_to_cpu(raw_super->log_sectorsize));
3316                 return -EFSCORRUPTED;
3317         }
3318
3319         segment_count = le32_to_cpu(raw_super->segment_count);
3320         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3321         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3322         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3323         total_sections = le32_to_cpu(raw_super->section_count);
3324
3325         /* blocks_per_seg should be 512, given the above check */
3326         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3327
3328         if (segment_count > F2FS_MAX_SEGMENT ||
3329                                 segment_count < F2FS_MIN_SEGMENTS) {
3330                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3331                 return -EFSCORRUPTED;
3332         }
3333
3334         if (total_sections > segment_count_main || total_sections < 1 ||
3335                         segs_per_sec > segment_count || !segs_per_sec) {
3336                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3337                           segment_count, total_sections, segs_per_sec);
3338                 return -EFSCORRUPTED;
3339         }
3340
3341         if (segment_count_main != total_sections * segs_per_sec) {
3342                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3343                           segment_count_main, total_sections, segs_per_sec);
3344                 return -EFSCORRUPTED;
3345         }
3346
3347         if ((segment_count / segs_per_sec) < total_sections) {
3348                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3349                           segment_count, segs_per_sec, total_sections);
3350                 return -EFSCORRUPTED;
3351         }
3352
3353         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3354                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3355                           segment_count, le64_to_cpu(raw_super->block_count));
3356                 return -EFSCORRUPTED;
3357         }
3358
3359         if (RDEV(0).path[0]) {
3360                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3361                 int i = 1;
3362
3363                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3364                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3365                         i++;
3366                 }
3367                 if (segment_count != dev_seg_count) {
3368                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3369                                         segment_count, dev_seg_count);
3370                         return -EFSCORRUPTED;
3371                 }
3372         } else {
3373                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3374                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3375                         f2fs_info(sbi, "Zoned block device path is missing");
3376                         return -EFSCORRUPTED;
3377                 }
3378         }
3379
3380         if (secs_per_zone > total_sections || !secs_per_zone) {
3381                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3382                           secs_per_zone, total_sections);
3383                 return -EFSCORRUPTED;
3384         }
3385         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3386                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3387                         (le32_to_cpu(raw_super->extension_count) +
3388                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3389                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3390                           le32_to_cpu(raw_super->extension_count),
3391                           raw_super->hot_ext_count,
3392                           F2FS_MAX_EXTENSION);
3393                 return -EFSCORRUPTED;
3394         }
3395
3396         if (le32_to_cpu(raw_super->cp_payload) >=
3397                                 (blocks_per_seg - F2FS_CP_PACKS -
3398                                 NR_CURSEG_PERSIST_TYPE)) {
3399                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3400                           le32_to_cpu(raw_super->cp_payload),
3401                           blocks_per_seg - F2FS_CP_PACKS -
3402                           NR_CURSEG_PERSIST_TYPE);
3403                 return -EFSCORRUPTED;
3404         }
3405
3406         /* check reserved ino info */
3407         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3408                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3409                 le32_to_cpu(raw_super->root_ino) != 3) {
3410                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3411                           le32_to_cpu(raw_super->node_ino),
3412                           le32_to_cpu(raw_super->meta_ino),
3413                           le32_to_cpu(raw_super->root_ino));
3414                 return -EFSCORRUPTED;
3415         }
3416
3417         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3418         if (sanity_check_area_boundary(sbi, bh))
3419                 return -EFSCORRUPTED;
3420
3421         return 0;
3422 }
3423
3424 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3425 {
3426         unsigned int total, fsmeta;
3427         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3428         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3429         unsigned int ovp_segments, reserved_segments;
3430         unsigned int main_segs, blocks_per_seg;
3431         unsigned int sit_segs, nat_segs;
3432         unsigned int sit_bitmap_size, nat_bitmap_size;
3433         unsigned int log_blocks_per_seg;
3434         unsigned int segment_count_main;
3435         unsigned int cp_pack_start_sum, cp_payload;
3436         block_t user_block_count, valid_user_blocks;
3437         block_t avail_node_count, valid_node_count;
3438         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3439         int i, j;
3440
3441         total = le32_to_cpu(raw_super->segment_count);
3442         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3443         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3444         fsmeta += sit_segs;
3445         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3446         fsmeta += nat_segs;
3447         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3448         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3449
3450         if (unlikely(fsmeta >= total))
3451                 return 1;
3452
3453         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3454         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3455
3456         if (!f2fs_sb_has_readonly(sbi) &&
3457                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3458                         ovp_segments == 0 || reserved_segments == 0)) {
3459                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3460                 return 1;
3461         }
3462         user_block_count = le64_to_cpu(ckpt->user_block_count);
3463         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3464                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3465         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3466         if (!user_block_count || user_block_count >=
3467                         segment_count_main << log_blocks_per_seg) {
3468                 f2fs_err(sbi, "Wrong user_block_count: %u",
3469                          user_block_count);
3470                 return 1;
3471         }
3472
3473         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3474         if (valid_user_blocks > user_block_count) {
3475                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3476                          valid_user_blocks, user_block_count);
3477                 return 1;
3478         }
3479
3480         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3481         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3482         if (valid_node_count > avail_node_count) {
3483                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3484                          valid_node_count, avail_node_count);
3485                 return 1;
3486         }
3487
3488         main_segs = le32_to_cpu(raw_super->segment_count_main);
3489         blocks_per_seg = sbi->blocks_per_seg;
3490
3491         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3492                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3493                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3494                         return 1;
3495
3496                 if (f2fs_sb_has_readonly(sbi))
3497                         goto check_data;
3498
3499                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3500                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3501                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3502                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3503                                          i, j,
3504                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3505                                 return 1;
3506                         }
3507                 }
3508         }
3509 check_data:
3510         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3511                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3512                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3513                         return 1;
3514
3515                 if (f2fs_sb_has_readonly(sbi))
3516                         goto skip_cross;
3517
3518                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3519                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3520                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3521                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3522                                          i, j,
3523                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3524                                 return 1;
3525                         }
3526                 }
3527         }
3528         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3529                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3530                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3531                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3532                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3533                                          i, j,
3534                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3535                                 return 1;
3536                         }
3537                 }
3538         }
3539 skip_cross:
3540         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3541         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3542
3543         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3544                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3545                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3546                          sit_bitmap_size, nat_bitmap_size);
3547                 return 1;
3548         }
3549
3550         cp_pack_start_sum = __start_sum_addr(sbi);
3551         cp_payload = __cp_payload(sbi);
3552         if (cp_pack_start_sum < cp_payload + 1 ||
3553                 cp_pack_start_sum > blocks_per_seg - 1 -
3554                         NR_CURSEG_PERSIST_TYPE) {
3555                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3556                          cp_pack_start_sum);
3557                 return 1;
3558         }
3559
3560         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3561                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3562                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3563                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3564                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3565                           le32_to_cpu(ckpt->checksum_offset));
3566                 return 1;
3567         }
3568
3569         nat_blocks = nat_segs << log_blocks_per_seg;
3570         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3571         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3572         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3573                 (cp_payload + F2FS_CP_PACKS +
3574                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3575                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3576                           cp_payload, nat_bits_blocks);
3577                 return 1;
3578         }
3579
3580         if (unlikely(f2fs_cp_error(sbi))) {
3581                 f2fs_err(sbi, "A bug case: need to run fsck");
3582                 return 1;
3583         }
3584         return 0;
3585 }
3586
3587 static void init_sb_info(struct f2fs_sb_info *sbi)
3588 {
3589         struct f2fs_super_block *raw_super = sbi->raw_super;
3590         int i;
3591
3592         sbi->log_sectors_per_block =
3593                 le32_to_cpu(raw_super->log_sectors_per_block);
3594         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3595         sbi->blocksize = 1 << sbi->log_blocksize;
3596         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3597         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3598         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3599         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3600         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3601         sbi->total_node_count =
3602                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3603                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3604         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3605         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3606         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3607         sbi->cur_victim_sec = NULL_SECNO;
3608         sbi->gc_mode = GC_NORMAL;
3609         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3610         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3611         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3612         sbi->migration_granularity = sbi->segs_per_sec;
3613         sbi->seq_file_ra_mul = MIN_RA_MUL;
3614         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3615         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3616         spin_lock_init(&sbi->gc_urgent_high_lock);
3617         atomic64_set(&sbi->current_atomic_write, 0);
3618
3619         sbi->dir_level = DEF_DIR_LEVEL;
3620         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3621         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3622         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3623         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3624         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3625         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3626                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3627         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3628
3629         for (i = 0; i < NR_COUNT_TYPE; i++)
3630                 atomic_set(&sbi->nr_pages[i], 0);
3631
3632         for (i = 0; i < META; i++)
3633                 atomic_set(&sbi->wb_sync_req[i], 0);
3634
3635         INIT_LIST_HEAD(&sbi->s_list);
3636         mutex_init(&sbi->umount_mutex);
3637         init_f2fs_rwsem(&sbi->io_order_lock);
3638         spin_lock_init(&sbi->cp_lock);
3639
3640         sbi->dirty_device = 0;
3641         spin_lock_init(&sbi->dev_lock);
3642
3643         init_f2fs_rwsem(&sbi->sb_lock);
3644         init_f2fs_rwsem(&sbi->pin_sem);
3645 }
3646
3647 static int init_percpu_info(struct f2fs_sb_info *sbi)
3648 {
3649         int err;
3650
3651         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3652         if (err)
3653                 return err;
3654
3655         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3656         if (err)
3657                 goto err_valid_block;
3658
3659         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3660                                                                 GFP_KERNEL);
3661         if (err)
3662                 goto err_node_block;
3663         return 0;
3664
3665 err_node_block:
3666         percpu_counter_destroy(&sbi->rf_node_block_count);
3667 err_valid_block:
3668         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3669         return err;
3670 }
3671
3672 #ifdef CONFIG_BLK_DEV_ZONED
3673
3674 struct f2fs_report_zones_args {
3675         struct f2fs_sb_info *sbi;
3676         struct f2fs_dev_info *dev;
3677 };
3678
3679 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3680                               void *data)
3681 {
3682         struct f2fs_report_zones_args *rz_args = data;
3683         block_t unusable_blocks = (zone->len - zone->capacity) >>
3684                                         F2FS_LOG_SECTORS_PER_BLOCK;
3685
3686         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3687                 return 0;
3688
3689         set_bit(idx, rz_args->dev->blkz_seq);
3690         if (!rz_args->sbi->unusable_blocks_per_sec) {
3691                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3692                 return 0;
3693         }
3694         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3695                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3696                 return -EINVAL;
3697         }
3698         return 0;
3699 }
3700
3701 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3702 {
3703         struct block_device *bdev = FDEV(devi).bdev;
3704         sector_t nr_sectors = bdev_nr_sectors(bdev);
3705         struct f2fs_report_zones_args rep_zone_arg;
3706         u64 zone_sectors;
3707         int ret;
3708
3709         if (!f2fs_sb_has_blkzoned(sbi))
3710                 return 0;
3711
3712         zone_sectors = bdev_zone_sectors(bdev);
3713         if (!is_power_of_2(zone_sectors)) {
3714                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3715                 return -EINVAL;
3716         }
3717
3718         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3719                                 SECTOR_TO_BLOCK(zone_sectors))
3720                 return -EINVAL;
3721         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3722         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3723                                 __ilog2_u32(sbi->blocks_per_blkz))
3724                 return -EINVAL;
3725         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3726         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3727                                         sbi->log_blocks_per_blkz;
3728         if (nr_sectors & (zone_sectors - 1))
3729                 FDEV(devi).nr_blkz++;
3730
3731         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3732                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3733                                         * sizeof(unsigned long),
3734                                         GFP_KERNEL);
3735         if (!FDEV(devi).blkz_seq)
3736                 return -ENOMEM;
3737
3738         rep_zone_arg.sbi = sbi;
3739         rep_zone_arg.dev = &FDEV(devi);
3740
3741         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3742                                   &rep_zone_arg);
3743         if (ret < 0)
3744                 return ret;
3745         return 0;
3746 }
3747 #endif
3748
3749 /*
3750  * Read f2fs raw super block.
3751  * Because we have two copies of super block, so read both of them
3752  * to get the first valid one. If any one of them is broken, we pass
3753  * them recovery flag back to the caller.
3754  */
3755 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3756                         struct f2fs_super_block **raw_super,
3757                         int *valid_super_block, int *recovery)
3758 {
3759         struct super_block *sb = sbi->sb;
3760         int block;
3761         struct buffer_head *bh;
3762         struct f2fs_super_block *super;
3763         int err = 0;
3764
3765         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3766         if (!super)
3767                 return -ENOMEM;
3768
3769         for (block = 0; block < 2; block++) {
3770                 bh = sb_bread(sb, block);
3771                 if (!bh) {
3772                         f2fs_err(sbi, "Unable to read %dth superblock",
3773                                  block + 1);
3774                         err = -EIO;
3775                         *recovery = 1;
3776                         continue;
3777                 }
3778
3779                 /* sanity checking of raw super */
3780                 err = sanity_check_raw_super(sbi, bh);
3781                 if (err) {
3782                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3783                                  block + 1);
3784                         brelse(bh);
3785                         *recovery = 1;
3786                         continue;
3787                 }
3788
3789                 if (!*raw_super) {
3790                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3791                                                         sizeof(*super));
3792                         *valid_super_block = block;
3793                         *raw_super = super;
3794                 }
3795                 brelse(bh);
3796         }
3797
3798         /* No valid superblock */
3799         if (!*raw_super)
3800                 kfree(super);
3801         else
3802                 err = 0;
3803
3804         return err;
3805 }
3806
3807 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3808 {
3809         struct buffer_head *bh;
3810         __u32 crc = 0;
3811         int err;
3812
3813         if ((recover && f2fs_readonly(sbi->sb)) ||
3814                                 bdev_read_only(sbi->sb->s_bdev)) {
3815                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3816                 return -EROFS;
3817         }
3818
3819         /* we should update superblock crc here */
3820         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3821                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3822                                 offsetof(struct f2fs_super_block, crc));
3823                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3824         }
3825
3826         /* write back-up superblock first */
3827         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3828         if (!bh)
3829                 return -EIO;
3830         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3831         brelse(bh);
3832
3833         /* if we are in recovery path, skip writing valid superblock */
3834         if (recover || err)
3835                 return err;
3836
3837         /* write current valid superblock */
3838         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3839         if (!bh)
3840                 return -EIO;
3841         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3842         brelse(bh);
3843         return err;
3844 }
3845
3846 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3847 {
3848         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3849         unsigned int max_devices = MAX_DEVICES;
3850         unsigned int logical_blksize;
3851         int i;
3852
3853         /* Initialize single device information */
3854         if (!RDEV(0).path[0]) {
3855                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3856                         return 0;
3857                 max_devices = 1;
3858         }
3859
3860         /*
3861          * Initialize multiple devices information, or single
3862          * zoned block device information.
3863          */
3864         sbi->devs = f2fs_kzalloc(sbi,
3865                                  array_size(max_devices,
3866                                             sizeof(struct f2fs_dev_info)),
3867                                  GFP_KERNEL);
3868         if (!sbi->devs)
3869                 return -ENOMEM;
3870
3871         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3872         sbi->aligned_blksize = true;
3873
3874         for (i = 0; i < max_devices; i++) {
3875
3876                 if (i > 0 && !RDEV(i).path[0])
3877                         break;
3878
3879                 if (max_devices == 1) {
3880                         /* Single zoned block device mount */
3881                         FDEV(0).bdev =
3882                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3883                                         sbi->sb->s_mode, sbi->sb->s_type);
3884                 } else {
3885                         /* Multi-device mount */
3886                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3887                         FDEV(i).total_segments =
3888                                 le32_to_cpu(RDEV(i).total_segments);
3889                         if (i == 0) {
3890                                 FDEV(i).start_blk = 0;
3891                                 FDEV(i).end_blk = FDEV(i).start_blk +
3892                                     (FDEV(i).total_segments <<
3893                                     sbi->log_blocks_per_seg) - 1 +
3894                                     le32_to_cpu(raw_super->segment0_blkaddr);
3895                         } else {
3896                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3897                                 FDEV(i).end_blk = FDEV(i).start_blk +
3898                                         (FDEV(i).total_segments <<
3899                                         sbi->log_blocks_per_seg) - 1;
3900                         }
3901                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3902                                         sbi->sb->s_mode, sbi->sb->s_type);
3903                 }
3904                 if (IS_ERR(FDEV(i).bdev))
3905                         return PTR_ERR(FDEV(i).bdev);
3906
3907                 /* to release errored devices */
3908                 sbi->s_ndevs = i + 1;
3909
3910                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
3911                         sbi->aligned_blksize = false;
3912
3913 #ifdef CONFIG_BLK_DEV_ZONED
3914                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3915                                 !f2fs_sb_has_blkzoned(sbi)) {
3916                         f2fs_err(sbi, "Zoned block device feature not enabled");
3917                         return -EINVAL;
3918                 }
3919                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3920                         if (init_blkz_info(sbi, i)) {
3921                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3922                                 return -EINVAL;
3923                         }
3924                         if (max_devices == 1)
3925                                 break;
3926                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3927                                   i, FDEV(i).path,
3928                                   FDEV(i).total_segments,
3929                                   FDEV(i).start_blk, FDEV(i).end_blk,
3930                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3931                                   "Host-aware" : "Host-managed");
3932                         continue;
3933                 }
3934 #endif
3935                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3936                           i, FDEV(i).path,
3937                           FDEV(i).total_segments,
3938                           FDEV(i).start_blk, FDEV(i).end_blk);
3939         }
3940         f2fs_info(sbi,
3941                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3942         return 0;
3943 }
3944
3945 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3946 {
3947 #if IS_ENABLED(CONFIG_UNICODE)
3948         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3949                 const struct f2fs_sb_encodings *encoding_info;
3950                 struct unicode_map *encoding;
3951                 __u16 encoding_flags;
3952
3953                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
3954                 if (!encoding_info) {
3955                         f2fs_err(sbi,
3956                                  "Encoding requested by superblock is unknown");
3957                         return -EINVAL;
3958                 }
3959
3960                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
3961                 encoding = utf8_load(encoding_info->version);
3962                 if (IS_ERR(encoding)) {
3963                         f2fs_err(sbi,
3964                                  "can't mount with superblock charset: %s-%u.%u.%u "
3965                                  "not supported by the kernel. flags: 0x%x.",
3966                                  encoding_info->name,
3967                                  unicode_major(encoding_info->version),
3968                                  unicode_minor(encoding_info->version),
3969                                  unicode_rev(encoding_info->version),
3970                                  encoding_flags);
3971                         return PTR_ERR(encoding);
3972                 }
3973                 f2fs_info(sbi, "Using encoding defined by superblock: "
3974                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
3975                          unicode_major(encoding_info->version),
3976                          unicode_minor(encoding_info->version),
3977                          unicode_rev(encoding_info->version),
3978                          encoding_flags);
3979
3980                 sbi->sb->s_encoding = encoding;
3981                 sbi->sb->s_encoding_flags = encoding_flags;
3982         }
3983 #else
3984         if (f2fs_sb_has_casefold(sbi)) {
3985                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3986                 return -EINVAL;
3987         }
3988 #endif
3989         return 0;
3990 }
3991
3992 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3993 {
3994         struct f2fs_sm_info *sm_i = SM_I(sbi);
3995
3996         /* adjust parameters according to the volume size */
3997         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3998                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3999                 if (f2fs_block_unit_discard(sbi))
4000                         sm_i->dcc_info->discard_granularity = 1;
4001                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE |
4002                                         1 << F2FS_IPU_HONOR_OPU_WRITE;
4003         }
4004
4005         sbi->readdir_ra = 1;
4006 }
4007
4008 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4009 {
4010         struct f2fs_sb_info *sbi;
4011         struct f2fs_super_block *raw_super;
4012         struct inode *root;
4013         int err;
4014         bool skip_recovery = false, need_fsck = false;
4015         char *options = NULL;
4016         int recovery, i, valid_super_block;
4017         struct curseg_info *seg_i;
4018         int retry_cnt = 1;
4019
4020 try_onemore:
4021         err = -EINVAL;
4022         raw_super = NULL;
4023         valid_super_block = -1;
4024         recovery = 0;
4025
4026         /* allocate memory for f2fs-specific super block info */
4027         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4028         if (!sbi)
4029                 return -ENOMEM;
4030
4031         sbi->sb = sb;
4032
4033         /* Load the checksum driver */
4034         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4035         if (IS_ERR(sbi->s_chksum_driver)) {
4036                 f2fs_err(sbi, "Cannot load crc32 driver.");
4037                 err = PTR_ERR(sbi->s_chksum_driver);
4038                 sbi->s_chksum_driver = NULL;
4039                 goto free_sbi;
4040         }
4041
4042         /* set a block size */
4043         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4044                 f2fs_err(sbi, "unable to set blocksize");
4045                 goto free_sbi;
4046         }
4047
4048         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4049                                                                 &recovery);
4050         if (err)
4051                 goto free_sbi;
4052
4053         sb->s_fs_info = sbi;
4054         sbi->raw_super = raw_super;
4055
4056         /* precompute checksum seed for metadata */
4057         if (f2fs_sb_has_inode_chksum(sbi))
4058                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4059                                                 sizeof(raw_super->uuid));
4060
4061         default_options(sbi);
4062         /* parse mount options */
4063         options = kstrdup((const char *)data, GFP_KERNEL);
4064         if (data && !options) {
4065                 err = -ENOMEM;
4066                 goto free_sb_buf;
4067         }
4068
4069         err = parse_options(sb, options, false);
4070         if (err)
4071                 goto free_options;
4072
4073         sb->s_maxbytes = max_file_blocks(NULL) <<
4074                                 le32_to_cpu(raw_super->log_blocksize);
4075         sb->s_max_links = F2FS_LINK_MAX;
4076
4077         err = f2fs_setup_casefold(sbi);
4078         if (err)
4079                 goto free_options;
4080
4081 #ifdef CONFIG_QUOTA
4082         sb->dq_op = &f2fs_quota_operations;
4083         sb->s_qcop = &f2fs_quotactl_ops;
4084         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4085
4086         if (f2fs_sb_has_quota_ino(sbi)) {
4087                 for (i = 0; i < MAXQUOTAS; i++) {
4088                         if (f2fs_qf_ino(sbi->sb, i))
4089                                 sbi->nquota_files++;
4090                 }
4091         }
4092 #endif
4093
4094         sb->s_op = &f2fs_sops;
4095 #ifdef CONFIG_FS_ENCRYPTION
4096         sb->s_cop = &f2fs_cryptops;
4097 #endif
4098 #ifdef CONFIG_FS_VERITY
4099         sb->s_vop = &f2fs_verityops;
4100 #endif
4101         sb->s_xattr = f2fs_xattr_handlers;
4102         sb->s_export_op = &f2fs_export_ops;
4103         sb->s_magic = F2FS_SUPER_MAGIC;
4104         sb->s_time_gran = 1;
4105         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4106                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4107         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4108         sb->s_iflags |= SB_I_CGROUPWB;
4109
4110         /* init f2fs-specific super block info */
4111         sbi->valid_super_block = valid_super_block;
4112         init_f2fs_rwsem(&sbi->gc_lock);
4113         mutex_init(&sbi->writepages);
4114         init_f2fs_rwsem(&sbi->cp_global_sem);
4115         init_f2fs_rwsem(&sbi->node_write);
4116         init_f2fs_rwsem(&sbi->node_change);
4117
4118         /* disallow all the data/node/meta page writes */
4119         set_sbi_flag(sbi, SBI_POR_DOING);
4120         spin_lock_init(&sbi->stat_lock);
4121
4122         err = f2fs_init_write_merge_io(sbi);
4123         if (err)
4124                 goto free_bio_info;
4125
4126         init_f2fs_rwsem(&sbi->cp_rwsem);
4127         init_f2fs_rwsem(&sbi->quota_sem);
4128         init_waitqueue_head(&sbi->cp_wait);
4129         init_sb_info(sbi);
4130
4131         err = f2fs_init_iostat(sbi);
4132         if (err)
4133                 goto free_bio_info;
4134
4135         err = init_percpu_info(sbi);
4136         if (err)
4137                 goto free_iostat;
4138
4139         if (F2FS_IO_ALIGNED(sbi)) {
4140                 sbi->write_io_dummy =
4141                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4142                 if (!sbi->write_io_dummy) {
4143                         err = -ENOMEM;
4144                         goto free_percpu;
4145                 }
4146         }
4147
4148         /* init per sbi slab cache */
4149         err = f2fs_init_xattr_caches(sbi);
4150         if (err)
4151                 goto free_io_dummy;
4152         err = f2fs_init_page_array_cache(sbi);
4153         if (err)
4154                 goto free_xattr_cache;
4155
4156         /* get an inode for meta space */
4157         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4158         if (IS_ERR(sbi->meta_inode)) {
4159                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4160                 err = PTR_ERR(sbi->meta_inode);
4161                 goto free_page_array_cache;
4162         }
4163
4164         err = f2fs_get_valid_checkpoint(sbi);
4165         if (err) {
4166                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4167                 goto free_meta_inode;
4168         }
4169
4170         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4171                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4172         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4173                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4174                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4175         }
4176
4177         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4178                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4179
4180         /* Initialize device list */
4181         err = f2fs_scan_devices(sbi);
4182         if (err) {
4183                 f2fs_err(sbi, "Failed to find devices");
4184                 goto free_devices;
4185         }
4186
4187         err = f2fs_init_post_read_wq(sbi);
4188         if (err) {
4189                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4190                 goto free_devices;
4191         }
4192
4193         sbi->total_valid_node_count =
4194                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4195         percpu_counter_set(&sbi->total_valid_inode_count,
4196                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4197         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4198         sbi->total_valid_block_count =
4199                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4200         sbi->last_valid_block_count = sbi->total_valid_block_count;
4201         sbi->reserved_blocks = 0;
4202         sbi->current_reserved_blocks = 0;
4203         limit_reserve_root(sbi);
4204         adjust_unusable_cap_perc(sbi);
4205
4206         for (i = 0; i < NR_INODE_TYPE; i++) {
4207                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4208                 spin_lock_init(&sbi->inode_lock[i]);
4209         }
4210         mutex_init(&sbi->flush_lock);
4211
4212         f2fs_init_extent_cache_info(sbi);
4213
4214         f2fs_init_ino_entry_info(sbi);
4215
4216         f2fs_init_fsync_node_info(sbi);
4217
4218         /* setup checkpoint request control and start checkpoint issue thread */
4219         f2fs_init_ckpt_req_control(sbi);
4220         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4221                         test_opt(sbi, MERGE_CHECKPOINT)) {
4222                 err = f2fs_start_ckpt_thread(sbi);
4223                 if (err) {
4224                         f2fs_err(sbi,
4225                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4226                             err);
4227                         goto stop_ckpt_thread;
4228                 }
4229         }
4230
4231         /* setup f2fs internal modules */
4232         err = f2fs_build_segment_manager(sbi);
4233         if (err) {
4234                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4235                          err);
4236                 goto free_sm;
4237         }
4238         err = f2fs_build_node_manager(sbi);
4239         if (err) {
4240                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4241                          err);
4242                 goto free_nm;
4243         }
4244
4245         err = adjust_reserved_segment(sbi);
4246         if (err)
4247                 goto free_nm;
4248
4249         /* For write statistics */
4250         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4251
4252         /* Read accumulated write IO statistics if exists */
4253         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4254         if (__exist_node_summaries(sbi))
4255                 sbi->kbytes_written =
4256                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4257
4258         f2fs_build_gc_manager(sbi);
4259
4260         err = f2fs_build_stats(sbi);
4261         if (err)
4262                 goto free_nm;
4263
4264         /* get an inode for node space */
4265         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4266         if (IS_ERR(sbi->node_inode)) {
4267                 f2fs_err(sbi, "Failed to read node inode");
4268                 err = PTR_ERR(sbi->node_inode);
4269                 goto free_stats;
4270         }
4271
4272         /* read root inode and dentry */
4273         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4274         if (IS_ERR(root)) {
4275                 f2fs_err(sbi, "Failed to read root inode");
4276                 err = PTR_ERR(root);
4277                 goto free_node_inode;
4278         }
4279         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4280                         !root->i_size || !root->i_nlink) {
4281                 iput(root);
4282                 err = -EINVAL;
4283                 goto free_node_inode;
4284         }
4285
4286         sb->s_root = d_make_root(root); /* allocate root dentry */
4287         if (!sb->s_root) {
4288                 err = -ENOMEM;
4289                 goto free_node_inode;
4290         }
4291
4292         err = f2fs_init_compress_inode(sbi);
4293         if (err)
4294                 goto free_root_inode;
4295
4296         err = f2fs_register_sysfs(sbi);
4297         if (err)
4298                 goto free_compress_inode;
4299
4300 #ifdef CONFIG_QUOTA
4301         /* Enable quota usage during mount */
4302         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4303                 err = f2fs_enable_quotas(sb);
4304                 if (err)
4305                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4306         }
4307 #endif
4308         /* if there are any orphan inodes, free them */
4309         err = f2fs_recover_orphan_inodes(sbi);
4310         if (err)
4311                 goto free_meta;
4312
4313         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4314                 goto reset_checkpoint;
4315
4316         /* recover fsynced data */
4317         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4318                         !test_opt(sbi, NORECOVERY)) {
4319                 /*
4320                  * mount should be failed, when device has readonly mode, and
4321                  * previous checkpoint was not done by clean system shutdown.
4322                  */
4323                 if (f2fs_hw_is_readonly(sbi)) {
4324                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4325                                 err = f2fs_recover_fsync_data(sbi, true);
4326                                 if (err > 0) {
4327                                         err = -EROFS;
4328                                         f2fs_err(sbi, "Need to recover fsync data, but "
4329                                                 "write access unavailable, please try "
4330                                                 "mount w/ disable_roll_forward or norecovery");
4331                                 }
4332                                 if (err < 0)
4333                                         goto free_meta;
4334                         }
4335                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4336                         goto reset_checkpoint;
4337                 }
4338
4339                 if (need_fsck)
4340                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4341
4342                 if (skip_recovery)
4343                         goto reset_checkpoint;
4344
4345                 err = f2fs_recover_fsync_data(sbi, false);
4346                 if (err < 0) {
4347                         if (err != -ENOMEM)
4348                                 skip_recovery = true;
4349                         need_fsck = true;
4350                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4351                                  err);
4352                         goto free_meta;
4353                 }
4354         } else {
4355                 err = f2fs_recover_fsync_data(sbi, true);
4356
4357                 if (!f2fs_readonly(sb) && err > 0) {
4358                         err = -EINVAL;
4359                         f2fs_err(sbi, "Need to recover fsync data");
4360                         goto free_meta;
4361                 }
4362         }
4363
4364         /*
4365          * If the f2fs is not readonly and fsync data recovery succeeds,
4366          * check zoned block devices' write pointer consistency.
4367          */
4368         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4369                 err = f2fs_check_write_pointer(sbi);
4370                 if (err)
4371                         goto free_meta;
4372         }
4373
4374 reset_checkpoint:
4375         f2fs_init_inmem_curseg(sbi);
4376
4377         /* f2fs_recover_fsync_data() cleared this already */
4378         clear_sbi_flag(sbi, SBI_POR_DOING);
4379
4380         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4381                 err = f2fs_disable_checkpoint(sbi);
4382                 if (err)
4383                         goto sync_free_meta;
4384         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4385                 f2fs_enable_checkpoint(sbi);
4386         }
4387
4388         /*
4389          * If filesystem is not mounted as read-only then
4390          * do start the gc_thread.
4391          */
4392         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4393                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4394                 /* After POR, we can run background GC thread.*/
4395                 err = f2fs_start_gc_thread(sbi);
4396                 if (err)
4397                         goto sync_free_meta;
4398         }
4399         kvfree(options);
4400
4401         /* recover broken superblock */
4402         if (recovery) {
4403                 err = f2fs_commit_super(sbi, true);
4404                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4405                           sbi->valid_super_block ? 1 : 2, err);
4406         }
4407
4408         f2fs_join_shrinker(sbi);
4409
4410         f2fs_tuning_parameters(sbi);
4411
4412         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4413                     cur_cp_version(F2FS_CKPT(sbi)));
4414         f2fs_update_time(sbi, CP_TIME);
4415         f2fs_update_time(sbi, REQ_TIME);
4416         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4417         return 0;
4418
4419 sync_free_meta:
4420         /* safe to flush all the data */
4421         sync_filesystem(sbi->sb);
4422         retry_cnt = 0;
4423
4424 free_meta:
4425 #ifdef CONFIG_QUOTA
4426         f2fs_truncate_quota_inode_pages(sb);
4427         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4428                 f2fs_quota_off_umount(sbi->sb);
4429 #endif
4430         /*
4431          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4432          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4433          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4434          * falls into an infinite loop in f2fs_sync_meta_pages().
4435          */
4436         truncate_inode_pages_final(META_MAPPING(sbi));
4437         /* evict some inodes being cached by GC */
4438         evict_inodes(sb);
4439         f2fs_unregister_sysfs(sbi);
4440 free_compress_inode:
4441         f2fs_destroy_compress_inode(sbi);
4442 free_root_inode:
4443         dput(sb->s_root);
4444         sb->s_root = NULL;
4445 free_node_inode:
4446         f2fs_release_ino_entry(sbi, true);
4447         truncate_inode_pages_final(NODE_MAPPING(sbi));
4448         iput(sbi->node_inode);
4449         sbi->node_inode = NULL;
4450 free_stats:
4451         f2fs_destroy_stats(sbi);
4452 free_nm:
4453         /* stop discard thread before destroying node manager */
4454         f2fs_stop_discard_thread(sbi);
4455         f2fs_destroy_node_manager(sbi);
4456 free_sm:
4457         f2fs_destroy_segment_manager(sbi);
4458         f2fs_destroy_post_read_wq(sbi);
4459 stop_ckpt_thread:
4460         f2fs_stop_ckpt_thread(sbi);
4461 free_devices:
4462         destroy_device_list(sbi);
4463         kvfree(sbi->ckpt);
4464 free_meta_inode:
4465         make_bad_inode(sbi->meta_inode);
4466         iput(sbi->meta_inode);
4467         sbi->meta_inode = NULL;
4468 free_page_array_cache:
4469         f2fs_destroy_page_array_cache(sbi);
4470 free_xattr_cache:
4471         f2fs_destroy_xattr_caches(sbi);
4472 free_io_dummy:
4473         mempool_destroy(sbi->write_io_dummy);
4474 free_percpu:
4475         destroy_percpu_info(sbi);
4476 free_iostat:
4477         f2fs_destroy_iostat(sbi);
4478 free_bio_info:
4479         for (i = 0; i < NR_PAGE_TYPE; i++)
4480                 kvfree(sbi->write_io[i]);
4481
4482 #if IS_ENABLED(CONFIG_UNICODE)
4483         utf8_unload(sb->s_encoding);
4484         sb->s_encoding = NULL;
4485 #endif
4486 free_options:
4487 #ifdef CONFIG_QUOTA
4488         for (i = 0; i < MAXQUOTAS; i++)
4489                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4490 #endif
4491         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4492         kvfree(options);
4493 free_sb_buf:
4494         kfree(raw_super);
4495 free_sbi:
4496         if (sbi->s_chksum_driver)
4497                 crypto_free_shash(sbi->s_chksum_driver);
4498         kfree(sbi);
4499
4500         /* give only one another chance */
4501         if (retry_cnt > 0 && skip_recovery) {
4502                 retry_cnt--;
4503                 shrink_dcache_sb(sb);
4504                 goto try_onemore;
4505         }
4506         return err;
4507 }
4508
4509 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4510                         const char *dev_name, void *data)
4511 {
4512         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4513 }
4514
4515 static void kill_f2fs_super(struct super_block *sb)
4516 {
4517         if (sb->s_root) {
4518                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4519
4520                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4521                 f2fs_stop_gc_thread(sbi);
4522                 f2fs_stop_discard_thread(sbi);
4523
4524 #ifdef CONFIG_F2FS_FS_COMPRESSION
4525                 /*
4526                  * latter evict_inode() can bypass checking and invalidating
4527                  * compress inode cache.
4528                  */
4529                 if (test_opt(sbi, COMPRESS_CACHE))
4530                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4531 #endif
4532
4533                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4534                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4535                         struct cp_control cpc = {
4536                                 .reason = CP_UMOUNT,
4537                         };
4538                         f2fs_write_checkpoint(sbi, &cpc);
4539                 }
4540
4541                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4542                         sb->s_flags &= ~SB_RDONLY;
4543         }
4544         kill_block_super(sb);
4545 }
4546
4547 static struct file_system_type f2fs_fs_type = {
4548         .owner          = THIS_MODULE,
4549         .name           = "f2fs",
4550         .mount          = f2fs_mount,
4551         .kill_sb        = kill_f2fs_super,
4552         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4553 };
4554 MODULE_ALIAS_FS("f2fs");
4555
4556 static int __init init_inodecache(void)
4557 {
4558         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4559                         sizeof(struct f2fs_inode_info), 0,
4560                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4561         if (!f2fs_inode_cachep)
4562                 return -ENOMEM;
4563         return 0;
4564 }
4565
4566 static void destroy_inodecache(void)
4567 {
4568         /*
4569          * Make sure all delayed rcu free inodes are flushed before we
4570          * destroy cache.
4571          */
4572         rcu_barrier();
4573         kmem_cache_destroy(f2fs_inode_cachep);
4574 }
4575
4576 static int __init init_f2fs_fs(void)
4577 {
4578         int err;
4579
4580         if (PAGE_SIZE != F2FS_BLKSIZE) {
4581                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4582                                 PAGE_SIZE, F2FS_BLKSIZE);
4583                 return -EINVAL;
4584         }
4585
4586         err = init_inodecache();
4587         if (err)
4588                 goto fail;
4589         err = f2fs_create_node_manager_caches();
4590         if (err)
4591                 goto free_inodecache;
4592         err = f2fs_create_segment_manager_caches();
4593         if (err)
4594                 goto free_node_manager_caches;
4595         err = f2fs_create_checkpoint_caches();
4596         if (err)
4597                 goto free_segment_manager_caches;
4598         err = f2fs_create_recovery_cache();
4599         if (err)
4600                 goto free_checkpoint_caches;
4601         err = f2fs_create_extent_cache();
4602         if (err)
4603                 goto free_recovery_cache;
4604         err = f2fs_create_garbage_collection_cache();
4605         if (err)
4606                 goto free_extent_cache;
4607         err = f2fs_init_sysfs();
4608         if (err)
4609                 goto free_garbage_collection_cache;
4610         err = register_shrinker(&f2fs_shrinker_info, "f2fs-shrinker");
4611         if (err)
4612                 goto free_sysfs;
4613         err = register_filesystem(&f2fs_fs_type);
4614         if (err)
4615                 goto free_shrinker;
4616         f2fs_create_root_stats();
4617         err = f2fs_init_post_read_processing();
4618         if (err)
4619                 goto free_root_stats;
4620         err = f2fs_init_iostat_processing();
4621         if (err)
4622                 goto free_post_read;
4623         err = f2fs_init_bio_entry_cache();
4624         if (err)
4625                 goto free_iostat;
4626         err = f2fs_init_bioset();
4627         if (err)
4628                 goto free_bio_enrty_cache;
4629         err = f2fs_init_compress_mempool();
4630         if (err)
4631                 goto free_bioset;
4632         err = f2fs_init_compress_cache();
4633         if (err)
4634                 goto free_compress_mempool;
4635         err = f2fs_create_casefold_cache();
4636         if (err)
4637                 goto free_compress_cache;
4638         return 0;
4639 free_compress_cache:
4640         f2fs_destroy_compress_cache();
4641 free_compress_mempool:
4642         f2fs_destroy_compress_mempool();
4643 free_bioset:
4644         f2fs_destroy_bioset();
4645 free_bio_enrty_cache:
4646         f2fs_destroy_bio_entry_cache();
4647 free_iostat:
4648         f2fs_destroy_iostat_processing();
4649 free_post_read:
4650         f2fs_destroy_post_read_processing();
4651 free_root_stats:
4652         f2fs_destroy_root_stats();
4653         unregister_filesystem(&f2fs_fs_type);
4654 free_shrinker:
4655         unregister_shrinker(&f2fs_shrinker_info);
4656 free_sysfs:
4657         f2fs_exit_sysfs();
4658 free_garbage_collection_cache:
4659         f2fs_destroy_garbage_collection_cache();
4660 free_extent_cache:
4661         f2fs_destroy_extent_cache();
4662 free_recovery_cache:
4663         f2fs_destroy_recovery_cache();
4664 free_checkpoint_caches:
4665         f2fs_destroy_checkpoint_caches();
4666 free_segment_manager_caches:
4667         f2fs_destroy_segment_manager_caches();
4668 free_node_manager_caches:
4669         f2fs_destroy_node_manager_caches();
4670 free_inodecache:
4671         destroy_inodecache();
4672 fail:
4673         return err;
4674 }
4675
4676 static void __exit exit_f2fs_fs(void)
4677 {
4678         f2fs_destroy_casefold_cache();
4679         f2fs_destroy_compress_cache();
4680         f2fs_destroy_compress_mempool();
4681         f2fs_destroy_bioset();
4682         f2fs_destroy_bio_entry_cache();
4683         f2fs_destroy_iostat_processing();
4684         f2fs_destroy_post_read_processing();
4685         f2fs_destroy_root_stats();
4686         unregister_filesystem(&f2fs_fs_type);
4687         unregister_shrinker(&f2fs_shrinker_info);
4688         f2fs_exit_sysfs();
4689         f2fs_destroy_garbage_collection_cache();
4690         f2fs_destroy_extent_cache();
4691         f2fs_destroy_recovery_cache();
4692         f2fs_destroy_checkpoint_caches();
4693         f2fs_destroy_segment_manager_caches();
4694         f2fs_destroy_node_manager_caches();
4695         destroy_inodecache();
4696 }
4697
4698 module_init(init_f2fs_fs)
4699 module_exit(exit_f2fs_fs)
4700
4701 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4702 MODULE_DESCRIPTION("Flash Friendly File System");
4703 MODULE_LICENSE("GPL");
4704 MODULE_SOFTDEP("pre: crc32");
4705