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 >> 3),
 305                         sbi->user_block_count - sbi->reserved_blocks);
 306
 307         /* limit is 12.5% */
 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 (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1346                 f2fs_err(sbi, "LFS not compatible with ATGC");
1347                 return -EINVAL;
1348         }
1349
1350         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1351                 f2fs_err(sbi, "Allow to mount readonly mode only");
1352                 return -EROFS;
1353         }
1354         return 0;
1355 }
1356
1357 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1358 {
1359         struct f2fs_inode_info *fi;
1360
1361         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC)) {
1362                 f2fs_show_injection_info(F2FS_SB(sb), FAULT_SLAB_ALLOC);
1363                 return NULL;
1364         }
1365
1366         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1367         if (!fi)
1368                 return NULL;
1369
1370         init_once((void *) fi);
1371
1372         /* Initialize f2fs-specific inode info */
1373         atomic_set(&fi->dirty_pages, 0);
1374         atomic_set(&fi->i_compr_blocks, 0);
1375         init_f2fs_rwsem(&fi->i_sem);
1376         spin_lock_init(&fi->i_size_lock);
1377         INIT_LIST_HEAD(&fi->dirty_list);
1378         INIT_LIST_HEAD(&fi->gdirty_list);
1379         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1380         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1381         init_f2fs_rwsem(&fi->i_xattr_sem);
1382
1383         /* Will be used by directory only */
1384         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1385
1386         return &fi->vfs_inode;
1387 }
1388
1389 static int f2fs_drop_inode(struct inode *inode)
1390 {
1391         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1392         int ret;
1393
1394         /*
1395          * during filesystem shutdown, if checkpoint is disabled,
1396          * drop useless meta/node dirty pages.
1397          */
1398         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1399                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1400                         inode->i_ino == F2FS_META_INO(sbi)) {
1401                         trace_f2fs_drop_inode(inode, 1);
1402                         return 1;
1403                 }
1404         }
1405
1406         /*
1407          * This is to avoid a deadlock condition like below.
1408          * writeback_single_inode(inode)
1409          *  - f2fs_write_data_page
1410          *    - f2fs_gc -> iput -> evict
1411          *       - inode_wait_for_writeback(inode)
1412          */
1413         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1414                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1415                         /* to avoid evict_inode call simultaneously */
1416                         atomic_inc(&inode->i_count);
1417                         spin_unlock(&inode->i_lock);
1418
1419                         f2fs_abort_atomic_write(inode, true);
1420
1421                         /* should remain fi->extent_tree for writepage */
1422                         f2fs_destroy_extent_node(inode);
1423
1424                         sb_start_intwrite(inode->i_sb);
1425                         f2fs_i_size_write(inode, 0);
1426
1427                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1428                                         inode, NULL, 0, DATA);
1429                         truncate_inode_pages_final(inode->i_mapping);
1430
1431                         if (F2FS_HAS_BLOCKS(inode))
1432                                 f2fs_truncate(inode);
1433
1434                         sb_end_intwrite(inode->i_sb);
1435
1436                         spin_lock(&inode->i_lock);
1437                         atomic_dec(&inode->i_count);
1438                 }
1439                 trace_f2fs_drop_inode(inode, 0);
1440                 return 0;
1441         }
1442         ret = generic_drop_inode(inode);
1443         if (!ret)
1444                 ret = fscrypt_drop_inode(inode);
1445         trace_f2fs_drop_inode(inode, ret);
1446         return ret;
1447 }
1448
1449 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1450 {
1451         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1452         int ret = 0;
1453
1454         spin_lock(&sbi->inode_lock[DIRTY_META]);
1455         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1456                 ret = 1;
1457         } else {
1458                 set_inode_flag(inode, FI_DIRTY_INODE);
1459                 stat_inc_dirty_inode(sbi, DIRTY_META);
1460         }
1461         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1462                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1463                                 &sbi->inode_list[DIRTY_META]);
1464                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1465         }
1466         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1467         return ret;
1468 }
1469
1470 void f2fs_inode_synced(struct inode *inode)
1471 {
1472         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1473
1474         spin_lock(&sbi->inode_lock[DIRTY_META]);
1475         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1476                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1477                 return;
1478         }
1479         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1480                 list_del_init(&F2FS_I(inode)->gdirty_list);
1481                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1482         }
1483         clear_inode_flag(inode, FI_DIRTY_INODE);
1484         clear_inode_flag(inode, FI_AUTO_RECOVER);
1485         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1486         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1487 }
1488
1489 /*
1490  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1491  *
1492  * We should call set_dirty_inode to write the dirty inode through write_inode.
1493  */
1494 static void f2fs_dirty_inode(struct inode *inode, int flags)
1495 {
1496         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1497
1498         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1499                         inode->i_ino == F2FS_META_INO(sbi))
1500                 return;
1501
1502         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1503                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1504
1505         f2fs_inode_dirtied(inode, false);
1506 }
1507
1508 static void f2fs_free_inode(struct inode *inode)
1509 {
1510         fscrypt_free_inode(inode);
1511         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1512 }
1513
1514 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1515 {
1516         percpu_counter_destroy(&sbi->total_valid_inode_count);
1517         percpu_counter_destroy(&sbi->rf_node_block_count);
1518         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1519 }
1520
1521 static void destroy_device_list(struct f2fs_sb_info *sbi)
1522 {
1523         int i;
1524
1525         for (i = 0; i < sbi->s_ndevs; i++) {
1526                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1527 #ifdef CONFIG_BLK_DEV_ZONED
1528                 kvfree(FDEV(i).blkz_seq);
1529 #endif
1530         }
1531         kvfree(sbi->devs);
1532 }
1533
1534 static void f2fs_put_super(struct super_block *sb)
1535 {
1536         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1537         int i;
1538         bool dropped;
1539
1540         /* unregister procfs/sysfs entries in advance to avoid race case */
1541         f2fs_unregister_sysfs(sbi);
1542
1543         f2fs_quota_off_umount(sb);
1544
1545         /* prevent remaining shrinker jobs */
1546         mutex_lock(&sbi->umount_mutex);
1547
1548         /*
1549          * flush all issued checkpoints and stop checkpoint issue thread.
1550          * after then, all checkpoints should be done by each process context.
1551          */
1552         f2fs_stop_ckpt_thread(sbi);
1553
1554         /*
1555          * We don't need to do checkpoint when superblock is clean.
1556          * But, the previous checkpoint was not done by umount, it needs to do
1557          * clean checkpoint again.
1558          */
1559         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1560                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1561                 struct cp_control cpc = {
1562                         .reason = CP_UMOUNT,
1563                 };
1564                 f2fs_write_checkpoint(sbi, &cpc);
1565         }
1566
1567         /* be sure to wait for any on-going discard commands */
1568         dropped = f2fs_issue_discard_timeout(sbi);
1569
1570         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1571                                         !sbi->discard_blks && !dropped) {
1572                 struct cp_control cpc = {
1573                         .reason = CP_UMOUNT | CP_TRIMMED,
1574                 };
1575                 f2fs_write_checkpoint(sbi, &cpc);
1576         }
1577
1578         /*
1579          * normally superblock is clean, so we need to release this.
1580          * In addition, EIO will skip do checkpoint, we need this as well.
1581          */
1582         f2fs_release_ino_entry(sbi, true);
1583
1584         f2fs_leave_shrinker(sbi);
1585         mutex_unlock(&sbi->umount_mutex);
1586
1587         /* our cp_error case, we can wait for any writeback page */
1588         f2fs_flush_merged_writes(sbi);
1589
1590         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1591
1592         f2fs_bug_on(sbi, sbi->fsync_node_num);
1593
1594         f2fs_destroy_compress_inode(sbi);
1595
1596         iput(sbi->node_inode);
1597         sbi->node_inode = NULL;
1598
1599         iput(sbi->meta_inode);
1600         sbi->meta_inode = NULL;
1601
1602         /*
1603          * iput() can update stat information, if f2fs_write_checkpoint()
1604          * above failed with error.
1605          */
1606         f2fs_destroy_stats(sbi);
1607
1608         /* destroy f2fs internal modules */
1609         f2fs_destroy_node_manager(sbi);
1610         f2fs_destroy_segment_manager(sbi);
1611
1612         f2fs_destroy_post_read_wq(sbi);
1613
1614         kvfree(sbi->ckpt);
1615
1616         sb->s_fs_info = NULL;
1617         if (sbi->s_chksum_driver)
1618                 crypto_free_shash(sbi->s_chksum_driver);
1619         kfree(sbi->raw_super);
1620
1621         destroy_device_list(sbi);
1622         f2fs_destroy_page_array_cache(sbi);
1623         f2fs_destroy_xattr_caches(sbi);
1624         mempool_destroy(sbi->write_io_dummy);
1625 #ifdef CONFIG_QUOTA
1626         for (i = 0; i < MAXQUOTAS; i++)
1627                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1628 #endif
1629         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1630         destroy_percpu_info(sbi);
1631         f2fs_destroy_iostat(sbi);
1632         for (i = 0; i < NR_PAGE_TYPE; i++)
1633                 kvfree(sbi->write_io[i]);
1634 #if IS_ENABLED(CONFIG_UNICODE)
1635         utf8_unload(sb->s_encoding);
1636 #endif
1637         kfree(sbi);
1638 }
1639
1640 int f2fs_sync_fs(struct super_block *sb, int sync)
1641 {
1642         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1643         int err = 0;
1644
1645         if (unlikely(f2fs_cp_error(sbi)))
1646                 return 0;
1647         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1648                 return 0;
1649
1650         trace_f2fs_sync_fs(sb, sync);
1651
1652         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1653                 return -EAGAIN;
1654
1655         if (sync)
1656                 err = f2fs_issue_checkpoint(sbi);
1657
1658         return err;
1659 }
1660
1661 static int f2fs_freeze(struct super_block *sb)
1662 {
1663         if (f2fs_readonly(sb))
1664                 return 0;
1665
1666         /* IO error happened before */
1667         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1668                 return -EIO;
1669
1670         /* must be clean, since sync_filesystem() was already called */
1671         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1672                 return -EINVAL;
1673
1674         /* Let's flush checkpoints and stop the thread. */
1675         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1676
1677         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1678         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1679         return 0;
1680 }
1681
1682 static int f2fs_unfreeze(struct super_block *sb)
1683 {
1684         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1685         return 0;
1686 }
1687
1688 #ifdef CONFIG_QUOTA
1689 static int f2fs_statfs_project(struct super_block *sb,
1690                                 kprojid_t projid, struct kstatfs *buf)
1691 {
1692         struct kqid qid;
1693         struct dquot *dquot;
1694         u64 limit;
1695         u64 curblock;
1696
1697         qid = make_kqid_projid(projid);
1698         dquot = dqget(sb, qid);
1699         if (IS_ERR(dquot))
1700                 return PTR_ERR(dquot);
1701         spin_lock(&dquot->dq_dqb_lock);
1702
1703         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1704                                         dquot->dq_dqb.dqb_bhardlimit);
1705         if (limit)
1706                 limit >>= sb->s_blocksize_bits;
1707
1708         if (limit && buf->f_blocks > limit) {
1709                 curblock = (dquot->dq_dqb.dqb_curspace +
1710                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1711                 buf->f_blocks = limit;
1712                 buf->f_bfree = buf->f_bavail =
1713                         (buf->f_blocks > curblock) ?
1714                          (buf->f_blocks - curblock) : 0;
1715         }
1716
1717         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1718                                         dquot->dq_dqb.dqb_ihardlimit);
1719
1720         if (limit && buf->f_files > limit) {
1721                 buf->f_files = limit;
1722                 buf->f_ffree =
1723                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1724                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1725         }
1726
1727         spin_unlock(&dquot->dq_dqb_lock);
1728         dqput(dquot);
1729         return 0;
1730 }
1731 #endif
1732
1733 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1734 {
1735         struct super_block *sb = dentry->d_sb;
1736         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1737         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1738         block_t total_count, user_block_count, start_count;
1739         u64 avail_node_count;
1740         unsigned int total_valid_node_count;
1741
1742         total_count = le64_to_cpu(sbi->raw_super->block_count);
1743         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1744         buf->f_type = F2FS_SUPER_MAGIC;
1745         buf->f_bsize = sbi->blocksize;
1746
1747         buf->f_blocks = total_count - start_count;
1748
1749         spin_lock(&sbi->stat_lock);
1750
1751         user_block_count = sbi->user_block_count;
1752         total_valid_node_count = valid_node_count(sbi);
1753         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1754         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1755                                                 sbi->current_reserved_blocks;
1756
1757         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1758                 buf->f_bfree = 0;
1759         else
1760                 buf->f_bfree -= sbi->unusable_block_count;
1761         spin_unlock(&sbi->stat_lock);
1762
1763         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1764                 buf->f_bavail = buf->f_bfree -
1765                                 F2FS_OPTION(sbi).root_reserved_blocks;
1766         else
1767                 buf->f_bavail = 0;
1768
1769         if (avail_node_count > user_block_count) {
1770                 buf->f_files = user_block_count;
1771                 buf->f_ffree = buf->f_bavail;
1772         } else {
1773                 buf->f_files = avail_node_count;
1774                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1775                                         buf->f_bavail);
1776         }
1777
1778         buf->f_namelen = F2FS_NAME_LEN;
1779         buf->f_fsid    = u64_to_fsid(id);
1780
1781 #ifdef CONFIG_QUOTA
1782         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1783                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1784                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1785         }
1786 #endif
1787         return 0;
1788 }
1789
1790 static inline void f2fs_show_quota_options(struct seq_file *seq,
1791                                            struct super_block *sb)
1792 {
1793 #ifdef CONFIG_QUOTA
1794         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1795
1796         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1797                 char *fmtname = "";
1798
1799                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1800                 case QFMT_VFS_OLD:
1801                         fmtname = "vfsold";
1802                         break;
1803                 case QFMT_VFS_V0:
1804                         fmtname = "vfsv0";
1805                         break;
1806                 case QFMT_VFS_V1:
1807                         fmtname = "vfsv1";
1808                         break;
1809                 }
1810                 seq_printf(seq, ",jqfmt=%s", fmtname);
1811         }
1812
1813         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1814                 seq_show_option(seq, "usrjquota",
1815                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1816
1817         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1818                 seq_show_option(seq, "grpjquota",
1819                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1820
1821         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1822                 seq_show_option(seq, "prjjquota",
1823                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1824 #endif
1825 }
1826
1827 #ifdef CONFIG_F2FS_FS_COMPRESSION
1828 static inline void f2fs_show_compress_options(struct seq_file *seq,
1829                                                         struct super_block *sb)
1830 {
1831         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1832         char *algtype = "";
1833         int i;
1834
1835         if (!f2fs_sb_has_compression(sbi))
1836                 return;
1837
1838         switch (F2FS_OPTION(sbi).compress_algorithm) {
1839         case COMPRESS_LZO:
1840                 algtype = "lzo";
1841                 break;
1842         case COMPRESS_LZ4:
1843                 algtype = "lz4";
1844                 break;
1845         case COMPRESS_ZSTD:
1846                 algtype = "zstd";
1847                 break;
1848         case COMPRESS_LZORLE:
1849                 algtype = "lzo-rle";
1850                 break;
1851         }
1852         seq_printf(seq, ",compress_algorithm=%s", algtype);
1853
1854         if (F2FS_OPTION(sbi).compress_level)
1855                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1856
1857         seq_printf(seq, ",compress_log_size=%u",
1858                         F2FS_OPTION(sbi).compress_log_size);
1859
1860         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1861                 seq_printf(seq, ",compress_extension=%s",
1862                         F2FS_OPTION(sbi).extensions[i]);
1863         }
1864
1865         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1866                 seq_printf(seq, ",nocompress_extension=%s",
1867                         F2FS_OPTION(sbi).noextensions[i]);
1868         }
1869
1870         if (F2FS_OPTION(sbi).compress_chksum)
1871                 seq_puts(seq, ",compress_chksum");
1872
1873         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1874                 seq_printf(seq, ",compress_mode=%s", "fs");
1875         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1876                 seq_printf(seq, ",compress_mode=%s", "user");
1877
1878         if (test_opt(sbi, COMPRESS_CACHE))
1879                 seq_puts(seq, ",compress_cache");
1880 }
1881 #endif
1882
1883 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1884 {
1885         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1886
1887         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1888                 seq_printf(seq, ",background_gc=%s", "sync");
1889         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1890                 seq_printf(seq, ",background_gc=%s", "on");
1891         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1892                 seq_printf(seq, ",background_gc=%s", "off");
1893
1894         if (test_opt(sbi, GC_MERGE))
1895                 seq_puts(seq, ",gc_merge");
1896
1897         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1898                 seq_puts(seq, ",disable_roll_forward");
1899         if (test_opt(sbi, NORECOVERY))
1900                 seq_puts(seq, ",norecovery");
1901         if (test_opt(sbi, DISCARD))
1902                 seq_puts(seq, ",discard");
1903         else
1904                 seq_puts(seq, ",nodiscard");
1905         if (test_opt(sbi, NOHEAP))
1906                 seq_puts(seq, ",no_heap");
1907         else
1908                 seq_puts(seq, ",heap");
1909 #ifdef CONFIG_F2FS_FS_XATTR
1910         if (test_opt(sbi, XATTR_USER))
1911                 seq_puts(seq, ",user_xattr");
1912         else
1913                 seq_puts(seq, ",nouser_xattr");
1914         if (test_opt(sbi, INLINE_XATTR))
1915                 seq_puts(seq, ",inline_xattr");
1916         else
1917                 seq_puts(seq, ",noinline_xattr");
1918         if (test_opt(sbi, INLINE_XATTR_SIZE))
1919                 seq_printf(seq, ",inline_xattr_size=%u",
1920                                         F2FS_OPTION(sbi).inline_xattr_size);
1921 #endif
1922 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1923         if (test_opt(sbi, POSIX_ACL))
1924                 seq_puts(seq, ",acl");
1925         else
1926                 seq_puts(seq, ",noacl");
1927 #endif
1928         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1929                 seq_puts(seq, ",disable_ext_identify");
1930         if (test_opt(sbi, INLINE_DATA))
1931                 seq_puts(seq, ",inline_data");
1932         else
1933                 seq_puts(seq, ",noinline_data");
1934         if (test_opt(sbi, INLINE_DENTRY))
1935                 seq_puts(seq, ",inline_dentry");
1936         else
1937                 seq_puts(seq, ",noinline_dentry");
1938         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1939                 seq_puts(seq, ",flush_merge");
1940         if (test_opt(sbi, NOBARRIER))
1941                 seq_puts(seq, ",nobarrier");
1942         if (test_opt(sbi, FASTBOOT))
1943                 seq_puts(seq, ",fastboot");
1944         if (test_opt(sbi, EXTENT_CACHE))
1945                 seq_puts(seq, ",extent_cache");
1946         else
1947                 seq_puts(seq, ",noextent_cache");
1948         if (test_opt(sbi, DATA_FLUSH))
1949                 seq_puts(seq, ",data_flush");
1950
1951         seq_puts(seq, ",mode=");
1952         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1953                 seq_puts(seq, "adaptive");
1954         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1955                 seq_puts(seq, "lfs");
1956         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
1957                 seq_puts(seq, "fragment:segment");
1958         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
1959                 seq_puts(seq, "fragment:block");
1960         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1961         if (test_opt(sbi, RESERVE_ROOT))
1962                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1963                                 F2FS_OPTION(sbi).root_reserved_blocks,
1964                                 from_kuid_munged(&init_user_ns,
1965                                         F2FS_OPTION(sbi).s_resuid),
1966                                 from_kgid_munged(&init_user_ns,
1967                                         F2FS_OPTION(sbi).s_resgid));
1968         if (F2FS_IO_SIZE_BITS(sbi))
1969                 seq_printf(seq, ",io_bits=%u",
1970                                 F2FS_OPTION(sbi).write_io_size_bits);
1971 #ifdef CONFIG_F2FS_FAULT_INJECTION
1972         if (test_opt(sbi, FAULT_INJECTION)) {
1973                 seq_printf(seq, ",fault_injection=%u",
1974                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1975                 seq_printf(seq, ",fault_type=%u",
1976                                 F2FS_OPTION(sbi).fault_info.inject_type);
1977         }
1978 #endif
1979 #ifdef CONFIG_QUOTA
1980         if (test_opt(sbi, QUOTA))
1981                 seq_puts(seq, ",quota");
1982         if (test_opt(sbi, USRQUOTA))
1983                 seq_puts(seq, ",usrquota");
1984         if (test_opt(sbi, GRPQUOTA))
1985                 seq_puts(seq, ",grpquota");
1986         if (test_opt(sbi, PRJQUOTA))
1987                 seq_puts(seq, ",prjquota");
1988 #endif
1989         f2fs_show_quota_options(seq, sbi->sb);
1990
1991         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1992
1993         if (sbi->sb->s_flags & SB_INLINECRYPT)
1994                 seq_puts(seq, ",inlinecrypt");
1995
1996         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1997                 seq_printf(seq, ",alloc_mode=%s", "default");
1998         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1999                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2000
2001         if (test_opt(sbi, DISABLE_CHECKPOINT))
2002                 seq_printf(seq, ",checkpoint=disable:%u",
2003                                 F2FS_OPTION(sbi).unusable_cap);
2004         if (test_opt(sbi, MERGE_CHECKPOINT))
2005                 seq_puts(seq, ",checkpoint_merge");
2006         else
2007                 seq_puts(seq, ",nocheckpoint_merge");
2008         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2009                 seq_printf(seq, ",fsync_mode=%s", "posix");
2010         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2011                 seq_printf(seq, ",fsync_mode=%s", "strict");
2012         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2013                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2014
2015 #ifdef CONFIG_F2FS_FS_COMPRESSION
2016         f2fs_show_compress_options(seq, sbi->sb);
2017 #endif
2018
2019         if (test_opt(sbi, ATGC))
2020                 seq_puts(seq, ",atgc");
2021
2022         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2023                 seq_printf(seq, ",discard_unit=%s", "block");
2024         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2025                 seq_printf(seq, ",discard_unit=%s", "segment");
2026         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2027                 seq_printf(seq, ",discard_unit=%s", "section");
2028
2029         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2030                 seq_printf(seq, ",memory=%s", "normal");
2031         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2032                 seq_printf(seq, ",memory=%s", "low");
2033
2034         return 0;
2035 }
2036
2037 static void default_options(struct f2fs_sb_info *sbi)
2038 {
2039         /* init some FS parameters */
2040         if (f2fs_sb_has_readonly(sbi))
2041                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2042         else
2043                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2044
2045         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2046         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2047         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2048         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2049         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2050         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2051         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2052         F2FS_OPTION(sbi).compress_ext_cnt = 0;
2053         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2054         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2055         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2056
2057         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2058
2059         set_opt(sbi, INLINE_XATTR);
2060         set_opt(sbi, INLINE_DATA);
2061         set_opt(sbi, INLINE_DENTRY);
2062         set_opt(sbi, EXTENT_CACHE);
2063         set_opt(sbi, NOHEAP);
2064         clear_opt(sbi, DISABLE_CHECKPOINT);
2065         set_opt(sbi, MERGE_CHECKPOINT);
2066         F2FS_OPTION(sbi).unusable_cap = 0;
2067         sbi->sb->s_flags |= SB_LAZYTIME;
2068         set_opt(sbi, FLUSH_MERGE);
2069         if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2070                 set_opt(sbi, DISCARD);
2071         if (f2fs_sb_has_blkzoned(sbi)) {
2072                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2073                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2074         } else {
2075                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2076                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2077         }
2078
2079 #ifdef CONFIG_F2FS_FS_XATTR
2080         set_opt(sbi, XATTR_USER);
2081 #endif
2082 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2083         set_opt(sbi, POSIX_ACL);
2084 #endif
2085
2086         f2fs_build_fault_attr(sbi, 0, 0);
2087 }
2088
2089 #ifdef CONFIG_QUOTA
2090 static int f2fs_enable_quotas(struct super_block *sb);
2091 #endif
2092
2093 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2094 {
2095         unsigned int s_flags = sbi->sb->s_flags;
2096         struct cp_control cpc;
2097         unsigned int gc_mode = sbi->gc_mode;
2098         int err = 0;
2099         int ret;
2100         block_t unusable;
2101
2102         if (s_flags & SB_RDONLY) {
2103                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2104                 return -EINVAL;
2105         }
2106         sbi->sb->s_flags |= SB_ACTIVE;
2107
2108         /* check if we need more GC first */
2109         unusable = f2fs_get_unusable_blocks(sbi);
2110         if (!f2fs_disable_cp_again(sbi, unusable))
2111                 goto skip_gc;
2112
2113         f2fs_update_time(sbi, DISABLE_TIME);
2114
2115         sbi->gc_mode = GC_URGENT_HIGH;
2116
2117         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2118                 struct f2fs_gc_control gc_control = {
2119                         .victim_segno = NULL_SEGNO,
2120                         .init_gc_type = FG_GC,
2121                         .should_migrate_blocks = false,
2122                         .err_gc_skipped = true,
2123                         .nr_free_secs = 1 };
2124
2125                 f2fs_down_write(&sbi->gc_lock);
2126                 err = f2fs_gc(sbi, &gc_control);
2127                 if (err == -ENODATA) {
2128                         err = 0;
2129                         break;
2130                 }
2131                 if (err && err != -EAGAIN)
2132                         break;
2133         }
2134
2135         ret = sync_filesystem(sbi->sb);
2136         if (ret || err) {
2137                 err = ret ? ret : err;
2138                 goto restore_flag;
2139         }
2140
2141         unusable = f2fs_get_unusable_blocks(sbi);
2142         if (f2fs_disable_cp_again(sbi, unusable)) {
2143                 err = -EAGAIN;
2144                 goto restore_flag;
2145         }
2146
2147 skip_gc:
2148         f2fs_down_write(&sbi->gc_lock);
2149         cpc.reason = CP_PAUSE;
2150         set_sbi_flag(sbi, SBI_CP_DISABLED);
2151         err = f2fs_write_checkpoint(sbi, &cpc);
2152         if (err)
2153                 goto out_unlock;
2154
2155         spin_lock(&sbi->stat_lock);
2156         sbi->unusable_block_count = unusable;
2157         spin_unlock(&sbi->stat_lock);
2158
2159 out_unlock:
2160         f2fs_up_write(&sbi->gc_lock);
2161 restore_flag:
2162         sbi->gc_mode = gc_mode;
2163         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2164         return err;
2165 }
2166
2167 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2168 {
2169         int retry = DEFAULT_RETRY_IO_COUNT;
2170
2171         /* we should flush all the data to keep data consistency */
2172         do {
2173                 sync_inodes_sb(sbi->sb);
2174                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2175         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2176
2177         if (unlikely(retry < 0))
2178                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2179
2180         f2fs_down_write(&sbi->gc_lock);
2181         f2fs_dirty_to_prefree(sbi);
2182
2183         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2184         set_sbi_flag(sbi, SBI_IS_DIRTY);
2185         f2fs_up_write(&sbi->gc_lock);
2186
2187         f2fs_sync_fs(sbi->sb, 1);
2188
2189         /* Let's ensure there's no pending checkpoint anymore */
2190         f2fs_flush_ckpt_thread(sbi);
2191 }
2192
2193 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2194 {
2195         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2196         struct f2fs_mount_info org_mount_opt;
2197         unsigned long old_sb_flags;
2198         int err;
2199         bool need_restart_gc = false, need_stop_gc = false;
2200         bool need_restart_ckpt = false, need_stop_ckpt = false;
2201         bool need_restart_flush = false, need_stop_flush = false;
2202         bool need_restart_discard = false, need_stop_discard = false;
2203         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2204         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2205         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2206         bool no_atgc = !test_opt(sbi, ATGC);
2207         bool no_discard = !test_opt(sbi, DISCARD);
2208         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2209         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2210         struct discard_cmd_control *dcc;
2211 #ifdef CONFIG_QUOTA
2212         int i, j;
2213 #endif
2214
2215         /*
2216          * Save the old mount options in case we
2217          * need to restore them.
2218          */
2219         org_mount_opt = sbi->mount_opt;
2220         old_sb_flags = sb->s_flags;
2221
2222 #ifdef CONFIG_QUOTA
2223         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2224         for (i = 0; i < MAXQUOTAS; i++) {
2225                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2226                         org_mount_opt.s_qf_names[i] =
2227                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2228                                 GFP_KERNEL);
2229                         if (!org_mount_opt.s_qf_names[i]) {
2230                                 for (j = 0; j < i; j++)
2231                                         kfree(org_mount_opt.s_qf_names[j]);
2232                                 return -ENOMEM;
2233                         }
2234                 } else {
2235                         org_mount_opt.s_qf_names[i] = NULL;
2236                 }
2237         }
2238 #endif
2239
2240         /* recover superblocks we couldn't write due to previous RO mount */
2241         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2242                 err = f2fs_commit_super(sbi, false);
2243                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2244                           err);
2245                 if (!err)
2246                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2247         }
2248
2249         default_options(sbi);
2250
2251         /* parse mount options */
2252         err = parse_options(sb, data, true);
2253         if (err)
2254                 goto restore_opts;
2255
2256         /*
2257          * Previous and new state of filesystem is RO,
2258          * so skip checking GC and FLUSH_MERGE conditions.
2259          */
2260         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2261                 goto skip;
2262
2263         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2264                 err = -EROFS;
2265                 goto restore_opts;
2266         }
2267
2268 #ifdef CONFIG_QUOTA
2269         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2270                 err = dquot_suspend(sb, -1);
2271                 if (err < 0)
2272                         goto restore_opts;
2273         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2274                 /* dquot_resume needs RW */
2275                 sb->s_flags &= ~SB_RDONLY;
2276                 if (sb_any_quota_suspended(sb)) {
2277                         dquot_resume(sb, -1);
2278                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2279                         err = f2fs_enable_quotas(sb);
2280                         if (err)
2281                                 goto restore_opts;
2282                 }
2283         }
2284 #endif
2285         /* disallow enable atgc dynamically */
2286         if (no_atgc == !!test_opt(sbi, ATGC)) {
2287                 err = -EINVAL;
2288                 f2fs_warn(sbi, "switch atgc option is not allowed");
2289                 goto restore_opts;
2290         }
2291
2292         /* disallow enable/disable extent_cache dynamically */
2293         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2294                 err = -EINVAL;
2295                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2296                 goto restore_opts;
2297         }
2298
2299         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2300                 err = -EINVAL;
2301                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2302                 goto restore_opts;
2303         }
2304
2305         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2306                 err = -EINVAL;
2307                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2308                 goto restore_opts;
2309         }
2310
2311         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2312                 err = -EINVAL;
2313                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2314                 goto restore_opts;
2315         }
2316
2317         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2318                 err = -EINVAL;
2319                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2320                 goto restore_opts;
2321         }
2322
2323         /*
2324          * We stop the GC thread if FS is mounted as RO
2325          * or if background_gc = off is passed in mount
2326          * option. Also sync the filesystem.
2327          */
2328         if ((*flags & SB_RDONLY) ||
2329                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2330                         !test_opt(sbi, GC_MERGE))) {
2331                 if (sbi->gc_thread) {
2332                         f2fs_stop_gc_thread(sbi);
2333                         need_restart_gc = true;
2334                 }
2335         } else if (!sbi->gc_thread) {
2336                 err = f2fs_start_gc_thread(sbi);
2337                 if (err)
2338                         goto restore_opts;
2339                 need_stop_gc = true;
2340         }
2341
2342         if (*flags & SB_RDONLY) {
2343                 sync_inodes_sb(sb);
2344
2345                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2346                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2347                 f2fs_sync_fs(sb, 1);
2348                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2349         }
2350
2351         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2352                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2353                 f2fs_stop_ckpt_thread(sbi);
2354                 need_restart_ckpt = true;
2355         } else {
2356                 /* Flush if the prevous checkpoint, if exists. */
2357                 f2fs_flush_ckpt_thread(sbi);
2358
2359                 err = f2fs_start_ckpt_thread(sbi);
2360                 if (err) {
2361                         f2fs_err(sbi,
2362                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2363                             err);
2364                         goto restore_gc;
2365                 }
2366                 need_stop_ckpt = true;
2367         }
2368
2369         /*
2370          * We stop issue flush thread if FS is mounted as RO
2371          * or if flush_merge is not passed in mount option.
2372          */
2373         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2374                 clear_opt(sbi, FLUSH_MERGE);
2375                 f2fs_destroy_flush_cmd_control(sbi, false);
2376                 need_restart_flush = true;
2377         } else {
2378                 err = f2fs_create_flush_cmd_control(sbi);
2379                 if (err)
2380                         goto restore_ckpt;
2381                 need_stop_flush = true;
2382         }
2383
2384         if (no_discard == !!test_opt(sbi, DISCARD)) {
2385                 if (test_opt(sbi, DISCARD)) {
2386                         err = f2fs_start_discard_thread(sbi);
2387                         if (err)
2388                                 goto restore_flush;
2389                         need_stop_discard = true;
2390                 } else {
2391                         dcc = SM_I(sbi)->dcc_info;
2392                         f2fs_stop_discard_thread(sbi);
2393                         if (atomic_read(&dcc->discard_cmd_cnt))
2394                                 f2fs_issue_discard_timeout(sbi);
2395                         need_restart_discard = true;
2396                 }
2397         }
2398
2399         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2400                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2401                         err = f2fs_disable_checkpoint(sbi);
2402                         if (err)
2403                                 goto restore_discard;
2404                 } else {
2405                         f2fs_enable_checkpoint(sbi);
2406                 }
2407         }
2408
2409 skip:
2410 #ifdef CONFIG_QUOTA
2411         /* Release old quota file names */
2412         for (i = 0; i < MAXQUOTAS; i++)
2413                 kfree(org_mount_opt.s_qf_names[i]);
2414 #endif
2415         /* Update the POSIXACL Flag */
2416         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2417                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2418
2419         limit_reserve_root(sbi);
2420         adjust_unusable_cap_perc(sbi);
2421         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2422         return 0;
2423 restore_discard:
2424         if (need_restart_discard) {
2425                 if (f2fs_start_discard_thread(sbi))
2426                         f2fs_warn(sbi, "discard has been stopped");
2427         } else if (need_stop_discard) {
2428                 f2fs_stop_discard_thread(sbi);
2429         }
2430 restore_flush:
2431         if (need_restart_flush) {
2432                 if (f2fs_create_flush_cmd_control(sbi))
2433                         f2fs_warn(sbi, "background flush thread has stopped");
2434         } else if (need_stop_flush) {
2435                 clear_opt(sbi, FLUSH_MERGE);
2436                 f2fs_destroy_flush_cmd_control(sbi, false);
2437         }
2438 restore_ckpt:
2439         if (need_restart_ckpt) {
2440                 if (f2fs_start_ckpt_thread(sbi))
2441                         f2fs_warn(sbi, "background ckpt thread has stopped");
2442         } else if (need_stop_ckpt) {
2443                 f2fs_stop_ckpt_thread(sbi);
2444         }
2445 restore_gc:
2446         if (need_restart_gc) {
2447                 if (f2fs_start_gc_thread(sbi))
2448                         f2fs_warn(sbi, "background gc thread has stopped");
2449         } else if (need_stop_gc) {
2450                 f2fs_stop_gc_thread(sbi);
2451         }
2452 restore_opts:
2453 #ifdef CONFIG_QUOTA
2454         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2455         for (i = 0; i < MAXQUOTAS; i++) {
2456                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2457                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2458         }
2459 #endif
2460         sbi->mount_opt = org_mount_opt;
2461         sb->s_flags = old_sb_flags;
2462         return err;
2463 }
2464
2465 #ifdef CONFIG_QUOTA
2466 /* Read data from quotafile */
2467 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2468                                size_t len, loff_t off)
2469 {
2470         struct inode *inode = sb_dqopt(sb)->files[type];
2471         struct address_space *mapping = inode->i_mapping;
2472         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2473         int offset = off & (sb->s_blocksize - 1);
2474         int tocopy;
2475         size_t toread;
2476         loff_t i_size = i_size_read(inode);
2477         struct page *page;
2478
2479         if (off > i_size)
2480                 return 0;
2481
2482         if (off + len > i_size)
2483                 len = i_size - off;
2484         toread = len;
2485         while (toread > 0) {
2486                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2487 repeat:
2488                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2489                 if (IS_ERR(page)) {
2490                         if (PTR_ERR(page) == -ENOMEM) {
2491                                 memalloc_retry_wait(GFP_NOFS);
2492                                 goto repeat;
2493                         }
2494                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2495                         return PTR_ERR(page);
2496                 }
2497
2498                 lock_page(page);
2499
2500                 if (unlikely(page->mapping != mapping)) {
2501                         f2fs_put_page(page, 1);
2502                         goto repeat;
2503                 }
2504                 if (unlikely(!PageUptodate(page))) {
2505                         f2fs_put_page(page, 1);
2506                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2507                         return -EIO;
2508                 }
2509
2510                 memcpy_from_page(data, page, offset, tocopy);
2511                 f2fs_put_page(page, 1);
2512
2513                 offset = 0;
2514                 toread -= tocopy;
2515                 data += tocopy;
2516                 blkidx++;
2517         }
2518         return len;
2519 }
2520
2521 /* Write to quotafile */
2522 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2523                                 const char *data, size_t len, loff_t off)
2524 {
2525         struct inode *inode = sb_dqopt(sb)->files[type];
2526         struct address_space *mapping = inode->i_mapping;
2527         const struct address_space_operations *a_ops = mapping->a_ops;
2528         int offset = off & (sb->s_blocksize - 1);
2529         size_t towrite = len;
2530         struct page *page;
2531         void *fsdata = NULL;
2532         int err = 0;
2533         int tocopy;
2534
2535         while (towrite > 0) {
2536                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2537                                                                 towrite);
2538 retry:
2539                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2540                                                         &page, &fsdata);
2541                 if (unlikely(err)) {
2542                         if (err == -ENOMEM) {
2543                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2544                                 goto retry;
2545                         }
2546                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2547                         break;
2548                 }
2549
2550                 memcpy_to_page(page, offset, data, tocopy);
2551
2552                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2553                                                 page, fsdata);
2554                 offset = 0;
2555                 towrite -= tocopy;
2556                 off += tocopy;
2557                 data += tocopy;
2558                 cond_resched();
2559         }
2560
2561         if (len == towrite)
2562                 return err;
2563         inode->i_mtime = inode->i_ctime = current_time(inode);
2564         f2fs_mark_inode_dirty_sync(inode, false);
2565         return len - towrite;
2566 }
2567
2568 int f2fs_dquot_initialize(struct inode *inode)
2569 {
2570         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2571                 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2572                 return -ESRCH;
2573         }
2574
2575         return dquot_initialize(inode);
2576 }
2577
2578 static struct dquot **f2fs_get_dquots(struct inode *inode)
2579 {
2580         return F2FS_I(inode)->i_dquot;
2581 }
2582
2583 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2584 {
2585         return &F2FS_I(inode)->i_reserved_quota;
2586 }
2587
2588 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2589 {
2590         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2591                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2592                 return 0;
2593         }
2594
2595         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2596                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2597 }
2598
2599 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2600 {
2601         int enabled = 0;
2602         int i, err;
2603
2604         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2605                 err = f2fs_enable_quotas(sbi->sb);
2606                 if (err) {
2607                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2608                         return 0;
2609                 }
2610                 return 1;
2611         }
2612
2613         for (i = 0; i < MAXQUOTAS; i++) {
2614                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2615                         err = f2fs_quota_on_mount(sbi, i);
2616                         if (!err) {
2617                                 enabled = 1;
2618                                 continue;
2619                         }
2620                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2621                                  err, i);
2622                 }
2623         }
2624         return enabled;
2625 }
2626
2627 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2628                              unsigned int flags)
2629 {
2630         struct inode *qf_inode;
2631         unsigned long qf_inum;
2632         int err;
2633
2634         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2635
2636         qf_inum = f2fs_qf_ino(sb, type);
2637         if (!qf_inum)
2638                 return -EPERM;
2639
2640         qf_inode = f2fs_iget(sb, qf_inum);
2641         if (IS_ERR(qf_inode)) {
2642                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2643                 return PTR_ERR(qf_inode);
2644         }
2645
2646         /* Don't account quota for quota files to avoid recursion */
2647         qf_inode->i_flags |= S_NOQUOTA;
2648         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2649         iput(qf_inode);
2650         return err;
2651 }
2652
2653 static int f2fs_enable_quotas(struct super_block *sb)
2654 {
2655         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2656         int type, err = 0;
2657         unsigned long qf_inum;
2658         bool quota_mopt[MAXQUOTAS] = {
2659                 test_opt(sbi, USRQUOTA),
2660                 test_opt(sbi, GRPQUOTA),
2661                 test_opt(sbi, PRJQUOTA),
2662         };
2663
2664         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2665                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2666                 return 0;
2667         }
2668
2669         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2670
2671         for (type = 0; type < MAXQUOTAS; type++) {
2672                 qf_inum = f2fs_qf_ino(sb, type);
2673                 if (qf_inum) {
2674                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2675                                 DQUOT_USAGE_ENABLED |
2676                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2677                         if (err) {
2678                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2679                                          type, err);
2680                                 for (type--; type >= 0; type--)
2681                                         dquot_quota_off(sb, type);
2682                                 set_sbi_flag(F2FS_SB(sb),
2683                                                 SBI_QUOTA_NEED_REPAIR);
2684                                 return err;
2685                         }
2686                 }
2687         }
2688         return 0;
2689 }
2690
2691 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2692 {
2693         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2694         struct address_space *mapping = dqopt->files[type]->i_mapping;
2695         int ret = 0;
2696
2697         ret = dquot_writeback_dquots(sbi->sb, type);
2698         if (ret)
2699                 goto out;
2700
2701         ret = filemap_fdatawrite(mapping);
2702         if (ret)
2703                 goto out;
2704
2705         /* if we are using journalled quota */
2706         if (is_journalled_quota(sbi))
2707                 goto out;
2708
2709         ret = filemap_fdatawait(mapping);
2710
2711         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2712 out:
2713         if (ret)
2714                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2715         return ret;
2716 }
2717
2718 int f2fs_quota_sync(struct super_block *sb, int type)
2719 {
2720         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2721         struct quota_info *dqopt = sb_dqopt(sb);
2722         int cnt;
2723         int ret = 0;
2724
2725         /*
2726          * Now when everything is written we can discard the pagecache so
2727          * that userspace sees the changes.
2728          */
2729         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2730
2731                 if (type != -1 && cnt != type)
2732                         continue;
2733
2734                 if (!sb_has_quota_active(sb, cnt))
2735                         continue;
2736
2737                 if (!f2fs_sb_has_quota_ino(sbi))
2738                         inode_lock(dqopt->files[cnt]);
2739
2740                 /*
2741                  * do_quotactl
2742                  *  f2fs_quota_sync
2743                  *  f2fs_down_read(quota_sem)
2744                  *  dquot_writeback_dquots()
2745                  *  f2fs_dquot_commit
2746                  *                            block_operation
2747                  *                            f2fs_down_read(quota_sem)
2748                  */
2749                 f2fs_lock_op(sbi);
2750                 f2fs_down_read(&sbi->quota_sem);
2751
2752                 ret = f2fs_quota_sync_file(sbi, cnt);
2753
2754                 f2fs_up_read(&sbi->quota_sem);
2755                 f2fs_unlock_op(sbi);
2756
2757                 if (!f2fs_sb_has_quota_ino(sbi))
2758                         inode_unlock(dqopt->files[cnt]);
2759
2760                 if (ret)
2761                         break;
2762         }
2763         return ret;
2764 }
2765
2766 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2767                                                         const struct path *path)
2768 {
2769         struct inode *inode;
2770         int err;
2771
2772         /* if quota sysfile exists, deny enabling quota with specific file */
2773         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2774                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2775                 return -EBUSY;
2776         }
2777
2778         err = f2fs_quota_sync(sb, type);
2779         if (err)
2780                 return err;
2781
2782         err = dquot_quota_on(sb, type, format_id, path);
2783         if (err)
2784                 return err;
2785
2786         inode = d_inode(path->dentry);
2787
2788         inode_lock(inode);
2789         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2790         f2fs_set_inode_flags(inode);
2791         inode_unlock(inode);
2792         f2fs_mark_inode_dirty_sync(inode, false);
2793
2794         return 0;
2795 }
2796
2797 static int __f2fs_quota_off(struct super_block *sb, int type)
2798 {
2799         struct inode *inode = sb_dqopt(sb)->files[type];
2800         int err;
2801
2802         if (!inode || !igrab(inode))
2803                 return dquot_quota_off(sb, type);
2804
2805         err = f2fs_quota_sync(sb, type);
2806         if (err)
2807                 goto out_put;
2808
2809         err = dquot_quota_off(sb, type);
2810         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2811                 goto out_put;
2812
2813         inode_lock(inode);
2814         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2815         f2fs_set_inode_flags(inode);
2816         inode_unlock(inode);
2817         f2fs_mark_inode_dirty_sync(inode, false);
2818 out_put:
2819         iput(inode);
2820         return err;
2821 }
2822
2823 static int f2fs_quota_off(struct super_block *sb, int type)
2824 {
2825         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2826         int err;
2827
2828         err = __f2fs_quota_off(sb, type);
2829
2830         /*
2831          * quotactl can shutdown journalled quota, result in inconsistence
2832          * between quota record and fs data by following updates, tag the
2833          * flag to let fsck be aware of it.
2834          */
2835         if (is_journalled_quota(sbi))
2836                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2837         return err;
2838 }
2839
2840 void f2fs_quota_off_umount(struct super_block *sb)
2841 {
2842         int type;
2843         int err;
2844
2845         for (type = 0; type < MAXQUOTAS; type++) {
2846                 err = __f2fs_quota_off(sb, type);
2847                 if (err) {
2848                         int ret = dquot_quota_off(sb, type);
2849
2850                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2851                                  type, err, ret);
2852                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2853                 }
2854         }
2855         /*
2856          * In case of checkpoint=disable, we must flush quota blocks.
2857          * This can cause NULL exception for node_inode in end_io, since
2858          * put_super already dropped it.
2859          */
2860         sync_filesystem(sb);
2861 }
2862
2863 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2864 {
2865         struct quota_info *dqopt = sb_dqopt(sb);
2866         int type;
2867
2868         for (type = 0; type < MAXQUOTAS; type++) {
2869                 if (!dqopt->files[type])
2870                         continue;
2871                 f2fs_inode_synced(dqopt->files[type]);
2872         }
2873 }
2874
2875 static int f2fs_dquot_commit(struct dquot *dquot)
2876 {
2877         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2878         int ret;
2879
2880         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2881         ret = dquot_commit(dquot);
2882         if (ret < 0)
2883                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2884         f2fs_up_read(&sbi->quota_sem);
2885         return ret;
2886 }
2887
2888 static int f2fs_dquot_acquire(struct dquot *dquot)
2889 {
2890         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2891         int ret;
2892
2893         f2fs_down_read(&sbi->quota_sem);
2894         ret = dquot_acquire(dquot);
2895         if (ret < 0)
2896                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2897         f2fs_up_read(&sbi->quota_sem);
2898         return ret;
2899 }
2900
2901 static int f2fs_dquot_release(struct dquot *dquot)
2902 {
2903         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2904         int ret = dquot_release(dquot);
2905
2906         if (ret < 0)
2907                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2908         return ret;
2909 }
2910
2911 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2912 {
2913         struct super_block *sb = dquot->dq_sb;
2914         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2915         int ret = dquot_mark_dquot_dirty(dquot);
2916
2917         /* if we are using journalled quota */
2918         if (is_journalled_quota(sbi))
2919                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2920
2921         return ret;
2922 }
2923
2924 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2925 {
2926         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2927         int ret = dquot_commit_info(sb, type);
2928
2929         if (ret < 0)
2930                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2931         return ret;
2932 }
2933
2934 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2935 {
2936         *projid = F2FS_I(inode)->i_projid;
2937         return 0;
2938 }
2939
2940 static const struct dquot_operations f2fs_quota_operations = {
2941         .get_reserved_space = f2fs_get_reserved_space,
2942         .write_dquot    = f2fs_dquot_commit,
2943         .acquire_dquot  = f2fs_dquot_acquire,
2944         .release_dquot  = f2fs_dquot_release,
2945         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2946         .write_info     = f2fs_dquot_commit_info,
2947         .alloc_dquot    = dquot_alloc,
2948         .destroy_dquot  = dquot_destroy,
2949         .get_projid     = f2fs_get_projid,
2950         .get_next_id    = dquot_get_next_id,
2951 };
2952
2953 static const struct quotactl_ops f2fs_quotactl_ops = {
2954         .quota_on       = f2fs_quota_on,
2955         .quota_off      = f2fs_quota_off,
2956         .quota_sync     = f2fs_quota_sync,
2957         .get_state      = dquot_get_state,
2958         .set_info       = dquot_set_dqinfo,
2959         .get_dqblk      = dquot_get_dqblk,
2960         .set_dqblk      = dquot_set_dqblk,
2961         .get_nextdqblk  = dquot_get_next_dqblk,
2962 };
2963 #else
2964 int f2fs_dquot_initialize(struct inode *inode)
2965 {
2966         return 0;
2967 }
2968
2969 int f2fs_quota_sync(struct super_block *sb, int type)
2970 {
2971         return 0;
2972 }
2973
2974 void f2fs_quota_off_umount(struct super_block *sb)
2975 {
2976 }
2977 #endif
2978
2979 static const struct super_operations f2fs_sops = {
2980         .alloc_inode    = f2fs_alloc_inode,
2981         .free_inode     = f2fs_free_inode,
2982         .drop_inode     = f2fs_drop_inode,
2983         .write_inode    = f2fs_write_inode,
2984         .dirty_inode    = f2fs_dirty_inode,
2985         .show_options   = f2fs_show_options,
2986 #ifdef CONFIG_QUOTA
2987         .quota_read     = f2fs_quota_read,
2988         .quota_write    = f2fs_quota_write,
2989         .get_dquots     = f2fs_get_dquots,
2990 #endif
2991         .evict_inode    = f2fs_evict_inode,
2992         .put_super      = f2fs_put_super,
2993         .sync_fs        = f2fs_sync_fs,
2994         .freeze_fs      = f2fs_freeze,
2995         .unfreeze_fs    = f2fs_unfreeze,
2996         .statfs         = f2fs_statfs,
2997         .remount_fs     = f2fs_remount,
2998 };
2999
3000 #ifdef CONFIG_FS_ENCRYPTION
3001 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3002 {
3003         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3004                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3005                                 ctx, len, NULL);
3006 }
3007
3008 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3009                                                         void *fs_data)
3010 {
3011         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3012
3013         /*
3014          * Encrypting the root directory is not allowed because fsck
3015          * expects lost+found directory to exist and remain unencrypted
3016          * if LOST_FOUND feature is enabled.
3017          *
3018          */
3019         if (f2fs_sb_has_lost_found(sbi) &&
3020                         inode->i_ino == F2FS_ROOT_INO(sbi))
3021                 return -EPERM;
3022
3023         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3024                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3025                                 ctx, len, fs_data, XATTR_CREATE);
3026 }
3027
3028 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3029 {
3030         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3031 }
3032
3033 static bool f2fs_has_stable_inodes(struct super_block *sb)
3034 {
3035         return true;
3036 }
3037
3038 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3039                                        int *ino_bits_ret, int *lblk_bits_ret)
3040 {
3041         *ino_bits_ret = 8 * sizeof(nid_t);
3042         *lblk_bits_ret = 8 * sizeof(block_t);
3043 }
3044
3045 static struct block_device **f2fs_get_devices(struct super_block *sb,
3046                                               unsigned int *num_devs)
3047 {
3048         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3049         struct block_device **devs;
3050         int i;
3051
3052         if (!f2fs_is_multi_device(sbi))
3053                 return NULL;
3054
3055         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3056         if (!devs)
3057                 return ERR_PTR(-ENOMEM);
3058
3059         for (i = 0; i < sbi->s_ndevs; i++)
3060                 devs[i] = FDEV(i).bdev;
3061         *num_devs = sbi->s_ndevs;
3062         return devs;
3063 }
3064
3065 static const struct fscrypt_operations f2fs_cryptops = {
3066         .key_prefix             = "f2fs:",
3067         .get_context            = f2fs_get_context,
3068         .set_context            = f2fs_set_context,
3069         .get_dummy_policy       = f2fs_get_dummy_policy,
3070         .empty_dir              = f2fs_empty_dir,
3071         .has_stable_inodes      = f2fs_has_stable_inodes,
3072         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3073         .get_devices            = f2fs_get_devices,
3074 };
3075 #endif
3076
3077 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3078                 u64 ino, u32 generation)
3079 {
3080         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3081         struct inode *inode;
3082
3083         if (f2fs_check_nid_range(sbi, ino))
3084                 return ERR_PTR(-ESTALE);
3085
3086         /*
3087          * f2fs_iget isn't quite right if the inode is currently unallocated!
3088          * However f2fs_iget currently does appropriate checks to handle stale
3089          * inodes so everything is OK.
3090          */
3091         inode = f2fs_iget(sb, ino);
3092         if (IS_ERR(inode))
3093                 return ERR_CAST(inode);
3094         if (unlikely(generation && inode->i_generation != generation)) {
3095                 /* we didn't find the right inode.. */
3096                 iput(inode);
3097                 return ERR_PTR(-ESTALE);
3098         }
3099         return inode;
3100 }
3101
3102 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3103                 int fh_len, int fh_type)
3104 {
3105         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3106                                     f2fs_nfs_get_inode);
3107 }
3108
3109 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3110                 int fh_len, int fh_type)
3111 {
3112         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3113                                     f2fs_nfs_get_inode);
3114 }
3115
3116 static const struct export_operations f2fs_export_ops = {
3117         .fh_to_dentry = f2fs_fh_to_dentry,
3118         .fh_to_parent = f2fs_fh_to_parent,
3119         .get_parent = f2fs_get_parent,
3120 };
3121
3122 loff_t max_file_blocks(struct inode *inode)
3123 {
3124         loff_t result = 0;
3125         loff_t leaf_count;
3126
3127         /*
3128          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3129          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3130          * space in inode.i_addr, it will be more safe to reassign
3131          * result as zero.
3132          */
3133
3134         if (inode && f2fs_compressed_file(inode))
3135                 leaf_count = ADDRS_PER_BLOCK(inode);
3136         else
3137                 leaf_count = DEF_ADDRS_PER_BLOCK;
3138
3139         /* two direct node blocks */
3140         result += (leaf_count * 2);
3141
3142         /* two indirect node blocks */
3143         leaf_count *= NIDS_PER_BLOCK;
3144         result += (leaf_count * 2);
3145
3146         /* one double indirect node block */
3147         leaf_count *= NIDS_PER_BLOCK;
3148         result += leaf_count;
3149
3150         return result;
3151 }
3152
3153 static int __f2fs_commit_super(struct buffer_head *bh,
3154                         struct f2fs_super_block *super)
3155 {
3156         lock_buffer(bh);
3157         if (super)
3158                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3159         set_buffer_dirty(bh);
3160         unlock_buffer(bh);
3161
3162         /* it's rare case, we can do fua all the time */
3163         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3164 }
3165
3166 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3167                                         struct buffer_head *bh)
3168 {
3169         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3170                                         (bh->b_data + F2FS_SUPER_OFFSET);
3171         struct super_block *sb = sbi->sb;
3172         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3173         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3174         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3175         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3176         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3177         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3178         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3179         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3180         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3181         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3182         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3183         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3184         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3185         u64 main_end_blkaddr = main_blkaddr +
3186                                 (segment_count_main << log_blocks_per_seg);
3187         u64 seg_end_blkaddr = segment0_blkaddr +
3188                                 (segment_count << log_blocks_per_seg);
3189
3190         if (segment0_blkaddr != cp_blkaddr) {
3191                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3192                           segment0_blkaddr, cp_blkaddr);
3193                 return true;
3194         }
3195
3196         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3197                                                         sit_blkaddr) {
3198                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3199                           cp_blkaddr, sit_blkaddr,
3200                           segment_count_ckpt << log_blocks_per_seg);
3201                 return true;
3202         }
3203
3204         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3205                                                         nat_blkaddr) {
3206                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3207                           sit_blkaddr, nat_blkaddr,
3208                           segment_count_sit << log_blocks_per_seg);
3209                 return true;
3210         }
3211
3212         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3213                                                         ssa_blkaddr) {
3214                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3215                           nat_blkaddr, ssa_blkaddr,
3216                           segment_count_nat << log_blocks_per_seg);
3217                 return true;
3218         }
3219
3220         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3221                                                         main_blkaddr) {
3222                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3223                           ssa_blkaddr, main_blkaddr,
3224                           segment_count_ssa << log_blocks_per_seg);
3225                 return true;
3226         }
3227
3228         if (main_end_blkaddr > seg_end_blkaddr) {
3229                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3230                           main_blkaddr, seg_end_blkaddr,
3231                           segment_count_main << log_blocks_per_seg);
3232                 return true;
3233         } else if (main_end_blkaddr < seg_end_blkaddr) {
3234                 int err = 0;
3235                 char *res;
3236
3237                 /* fix in-memory information all the time */
3238                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3239                                 segment0_blkaddr) >> log_blocks_per_seg);
3240
3241                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3242                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3243                         res = "internally";
3244                 } else {
3245                         err = __f2fs_commit_super(bh, NULL);
3246                         res = err ? "failed" : "done";
3247                 }
3248                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3249                           res, main_blkaddr, seg_end_blkaddr,
3250                           segment_count_main << log_blocks_per_seg);
3251                 if (err)
3252                         return true;
3253         }
3254         return false;
3255 }
3256
3257 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3258                                 struct buffer_head *bh)
3259 {
3260         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3261         block_t total_sections, blocks_per_seg;
3262         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3263                                         (bh->b_data + F2FS_SUPER_OFFSET);
3264         size_t crc_offset = 0;
3265         __u32 crc = 0;
3266
3267         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3268                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3269                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3270                 return -EINVAL;
3271         }
3272
3273         /* Check checksum_offset and crc in superblock */
3274         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3275                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3276                 if (crc_offset !=
3277                         offsetof(struct f2fs_super_block, crc)) {
3278                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3279                                   crc_offset);
3280                         return -EFSCORRUPTED;
3281                 }
3282                 crc = le32_to_cpu(raw_super->crc);
3283                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3284                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3285                         return -EFSCORRUPTED;
3286                 }
3287         }
3288
3289         /* Currently, support only 4KB block size */
3290         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3291                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3292                           le32_to_cpu(raw_super->log_blocksize),
3293                           F2FS_BLKSIZE_BITS);
3294                 return -EFSCORRUPTED;
3295         }
3296
3297         /* check log blocks per segment */
3298         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3299                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3300                           le32_to_cpu(raw_super->log_blocks_per_seg));
3301                 return -EFSCORRUPTED;
3302         }
3303
3304         /* Currently, support 512/1024/2048/4096 bytes sector size */
3305         if (le32_to_cpu(raw_super->log_sectorsize) >
3306                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3307                 le32_to_cpu(raw_super->log_sectorsize) <
3308                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3309                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3310                           le32_to_cpu(raw_super->log_sectorsize));
3311                 return -EFSCORRUPTED;
3312         }
3313         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3314                 le32_to_cpu(raw_super->log_sectorsize) !=
3315                         F2FS_MAX_LOG_SECTOR_SIZE) {
3316                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3317                           le32_to_cpu(raw_super->log_sectors_per_block),
3318                           le32_to_cpu(raw_super->log_sectorsize));
3319                 return -EFSCORRUPTED;
3320         }
3321
3322         segment_count = le32_to_cpu(raw_super->segment_count);
3323         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3324         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3325         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3326         total_sections = le32_to_cpu(raw_super->section_count);
3327
3328         /* blocks_per_seg should be 512, given the above check */
3329         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3330
3331         if (segment_count > F2FS_MAX_SEGMENT ||
3332                                 segment_count < F2FS_MIN_SEGMENTS) {
3333                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3334                 return -EFSCORRUPTED;
3335         }
3336
3337         if (total_sections > segment_count_main || total_sections < 1 ||
3338                         segs_per_sec > segment_count || !segs_per_sec) {
3339                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3340                           segment_count, total_sections, segs_per_sec);
3341                 return -EFSCORRUPTED;
3342         }
3343
3344         if (segment_count_main != total_sections * segs_per_sec) {
3345                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3346                           segment_count_main, total_sections, segs_per_sec);
3347                 return -EFSCORRUPTED;
3348         }
3349
3350         if ((segment_count / segs_per_sec) < total_sections) {
3351                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3352                           segment_count, segs_per_sec, total_sections);
3353                 return -EFSCORRUPTED;
3354         }
3355
3356         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3357                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3358                           segment_count, le64_to_cpu(raw_super->block_count));
3359                 return -EFSCORRUPTED;
3360         }
3361
3362         if (RDEV(0).path[0]) {
3363                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3364                 int i = 1;
3365
3366                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3367                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3368                         i++;
3369                 }
3370                 if (segment_count != dev_seg_count) {
3371                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3372                                         segment_count, dev_seg_count);
3373                         return -EFSCORRUPTED;
3374                 }
3375         } else {
3376                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3377                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3378                         f2fs_info(sbi, "Zoned block device path is missing");
3379                         return -EFSCORRUPTED;
3380                 }
3381         }
3382
3383         if (secs_per_zone > total_sections || !secs_per_zone) {
3384                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3385                           secs_per_zone, total_sections);
3386                 return -EFSCORRUPTED;
3387         }
3388         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3389                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3390                         (le32_to_cpu(raw_super->extension_count) +
3391                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3392                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3393                           le32_to_cpu(raw_super->extension_count),
3394                           raw_super->hot_ext_count,
3395                           F2FS_MAX_EXTENSION);
3396                 return -EFSCORRUPTED;
3397         }
3398
3399         if (le32_to_cpu(raw_super->cp_payload) >=
3400                                 (blocks_per_seg - F2FS_CP_PACKS -
3401                                 NR_CURSEG_PERSIST_TYPE)) {
3402                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3403                           le32_to_cpu(raw_super->cp_payload),
3404                           blocks_per_seg - F2FS_CP_PACKS -
3405                           NR_CURSEG_PERSIST_TYPE);
3406                 return -EFSCORRUPTED;
3407         }
3408
3409         /* check reserved ino info */
3410         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3411                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3412                 le32_to_cpu(raw_super->root_ino) != 3) {
3413                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3414                           le32_to_cpu(raw_super->node_ino),
3415                           le32_to_cpu(raw_super->meta_ino),
3416                           le32_to_cpu(raw_super->root_ino));
3417                 return -EFSCORRUPTED;
3418         }
3419
3420         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3421         if (sanity_check_area_boundary(sbi, bh))
3422                 return -EFSCORRUPTED;
3423
3424         return 0;
3425 }
3426
3427 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3428 {
3429         unsigned int total, fsmeta;
3430         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3431         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3432         unsigned int ovp_segments, reserved_segments;
3433         unsigned int main_segs, blocks_per_seg;
3434         unsigned int sit_segs, nat_segs;
3435         unsigned int sit_bitmap_size, nat_bitmap_size;
3436         unsigned int log_blocks_per_seg;
3437         unsigned int segment_count_main;
3438         unsigned int cp_pack_start_sum, cp_payload;
3439         block_t user_block_count, valid_user_blocks;
3440         block_t avail_node_count, valid_node_count;
3441         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3442         int i, j;
3443
3444         total = le32_to_cpu(raw_super->segment_count);
3445         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3446         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3447         fsmeta += sit_segs;
3448         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3449         fsmeta += nat_segs;
3450         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3451         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3452
3453         if (unlikely(fsmeta >= total))
3454                 return 1;
3455
3456         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3457         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3458
3459         if (!f2fs_sb_has_readonly(sbi) &&
3460                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3461                         ovp_segments == 0 || reserved_segments == 0)) {
3462                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3463                 return 1;
3464         }
3465         user_block_count = le64_to_cpu(ckpt->user_block_count);
3466         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3467                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3468         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3469         if (!user_block_count || user_block_count >=
3470                         segment_count_main << log_blocks_per_seg) {
3471                 f2fs_err(sbi, "Wrong user_block_count: %u",
3472                          user_block_count);
3473                 return 1;
3474         }
3475
3476         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3477         if (valid_user_blocks > user_block_count) {
3478                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3479                          valid_user_blocks, user_block_count);
3480                 return 1;
3481         }
3482
3483         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3484         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3485         if (valid_node_count > avail_node_count) {
3486                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3487                          valid_node_count, avail_node_count);
3488                 return 1;
3489         }
3490
3491         main_segs = le32_to_cpu(raw_super->segment_count_main);
3492         blocks_per_seg = sbi->blocks_per_seg;
3493
3494         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3495                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3496                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3497                         return 1;
3498
3499                 if (f2fs_sb_has_readonly(sbi))
3500                         goto check_data;
3501
3502                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3503                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3504                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3505                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3506                                          i, j,
3507                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3508                                 return 1;
3509                         }
3510                 }
3511         }
3512 check_data:
3513         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3514                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3515                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3516                         return 1;
3517
3518                 if (f2fs_sb_has_readonly(sbi))
3519                         goto skip_cross;
3520
3521                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3522                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3523                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3524                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3525                                          i, j,
3526                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3527                                 return 1;
3528                         }
3529                 }
3530         }
3531         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3532                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3533                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3534                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3535                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3536                                          i, j,
3537                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3538                                 return 1;
3539                         }
3540                 }
3541         }
3542 skip_cross:
3543         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3544         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3545
3546         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3547                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3548                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3549                          sit_bitmap_size, nat_bitmap_size);
3550                 return 1;
3551         }
3552
3553         cp_pack_start_sum = __start_sum_addr(sbi);
3554         cp_payload = __cp_payload(sbi);
3555         if (cp_pack_start_sum < cp_payload + 1 ||
3556                 cp_pack_start_sum > blocks_per_seg - 1 -
3557                         NR_CURSEG_PERSIST_TYPE) {
3558                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3559                          cp_pack_start_sum);
3560                 return 1;
3561         }
3562
3563         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3564                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3565                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3566                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3567                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3568                           le32_to_cpu(ckpt->checksum_offset));
3569                 return 1;
3570         }
3571
3572         nat_blocks = nat_segs << log_blocks_per_seg;
3573         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3574         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3575         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3576                 (cp_payload + F2FS_CP_PACKS +
3577                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3578                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3579                           cp_payload, nat_bits_blocks);
3580                 return 1;
3581         }
3582
3583         if (unlikely(f2fs_cp_error(sbi))) {
3584                 f2fs_err(sbi, "A bug case: need to run fsck");
3585                 return 1;
3586         }
3587         return 0;
3588 }
3589
3590 static void init_sb_info(struct f2fs_sb_info *sbi)
3591 {
3592         struct f2fs_super_block *raw_super = sbi->raw_super;
3593         int i;
3594
3595         sbi->log_sectors_per_block =
3596                 le32_to_cpu(raw_super->log_sectors_per_block);
3597         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3598         sbi->blocksize = 1 << sbi->log_blocksize;
3599         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3600         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3601         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3602         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3603         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3604         sbi->total_node_count =
3605                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3606                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3607         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3608         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3609         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3610         sbi->cur_victim_sec = NULL_SECNO;
3611         sbi->gc_mode = GC_NORMAL;
3612         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3613         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3614         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3615         sbi->migration_granularity = sbi->segs_per_sec;
3616         sbi->seq_file_ra_mul = MIN_RA_MUL;
3617         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3618         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3619         spin_lock_init(&sbi->gc_urgent_high_lock);
3620         atomic64_set(&sbi->current_atomic_write, 0);
3621
3622         sbi->dir_level = DEF_DIR_LEVEL;
3623         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3624         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3625         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3626         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3627         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3628         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3629                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3630         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3631
3632         for (i = 0; i < NR_COUNT_TYPE; i++)
3633                 atomic_set(&sbi->nr_pages[i], 0);
3634
3635         for (i = 0; i < META; i++)
3636                 atomic_set(&sbi->wb_sync_req[i], 0);
3637
3638         INIT_LIST_HEAD(&sbi->s_list);
3639         mutex_init(&sbi->umount_mutex);
3640         init_f2fs_rwsem(&sbi->io_order_lock);
3641         spin_lock_init(&sbi->cp_lock);
3642
3643         sbi->dirty_device = 0;
3644         spin_lock_init(&sbi->dev_lock);
3645
3646         init_f2fs_rwsem(&sbi->sb_lock);
3647         init_f2fs_rwsem(&sbi->pin_sem);
3648 }
3649
3650 static int init_percpu_info(struct f2fs_sb_info *sbi)
3651 {
3652         int err;
3653
3654         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3655         if (err)
3656                 return err;
3657
3658         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3659         if (err)
3660                 goto err_valid_block;
3661
3662         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3663                                                                 GFP_KERNEL);
3664         if (err)
3665                 goto err_node_block;
3666         return 0;
3667
3668 err_node_block:
3669         percpu_counter_destroy(&sbi->rf_node_block_count);
3670 err_valid_block:
3671         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3672         return err;
3673 }
3674
3675 #ifdef CONFIG_BLK_DEV_ZONED
3676
3677 struct f2fs_report_zones_args {
3678         struct f2fs_sb_info *sbi;
3679         struct f2fs_dev_info *dev;
3680 };
3681
3682 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3683                               void *data)
3684 {
3685         struct f2fs_report_zones_args *rz_args = data;
3686         block_t unusable_blocks = (zone->len - zone->capacity) >>
3687                                         F2FS_LOG_SECTORS_PER_BLOCK;
3688
3689         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3690                 return 0;
3691
3692         set_bit(idx, rz_args->dev->blkz_seq);
3693         if (!rz_args->sbi->unusable_blocks_per_sec) {
3694                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3695                 return 0;
3696         }
3697         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3698                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3699                 return -EINVAL;
3700         }
3701         return 0;
3702 }
3703
3704 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3705 {
3706         struct block_device *bdev = FDEV(devi).bdev;
3707         sector_t nr_sectors = bdev_nr_sectors(bdev);
3708         struct f2fs_report_zones_args rep_zone_arg;
3709         u64 zone_sectors;
3710         int ret;
3711
3712         if (!f2fs_sb_has_blkzoned(sbi))
3713                 return 0;
3714
3715         zone_sectors = bdev_zone_sectors(bdev);
3716         if (!is_power_of_2(zone_sectors)) {
3717                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3718                 return -EINVAL;
3719         }
3720
3721         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3722                                 SECTOR_TO_BLOCK(zone_sectors))
3723                 return -EINVAL;
3724         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3725         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3726                                 __ilog2_u32(sbi->blocks_per_blkz))
3727                 return -EINVAL;
3728         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3729         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3730                                         sbi->log_blocks_per_blkz;
3731         if (nr_sectors & (zone_sectors - 1))
3732                 FDEV(devi).nr_blkz++;
3733
3734         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3735                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3736                                         * sizeof(unsigned long),
3737                                         GFP_KERNEL);
3738         if (!FDEV(devi).blkz_seq)
3739                 return -ENOMEM;
3740
3741         rep_zone_arg.sbi = sbi;
3742         rep_zone_arg.dev = &FDEV(devi);
3743
3744         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3745                                   &rep_zone_arg);
3746         if (ret < 0)
3747                 return ret;
3748         return 0;
3749 }
3750 #endif
3751
3752 /*
3753  * Read f2fs raw super block.
3754  * Because we have two copies of super block, so read both of them
3755  * to get the first valid one. If any one of them is broken, we pass
3756  * them recovery flag back to the caller.
3757  */
3758 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3759                         struct f2fs_super_block **raw_super,
3760                         int *valid_super_block, int *recovery)
3761 {
3762         struct super_block *sb = sbi->sb;
3763         int block;
3764         struct buffer_head *bh;
3765         struct f2fs_super_block *super;
3766         int err = 0;
3767
3768         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3769         if (!super)
3770                 return -ENOMEM;
3771
3772         for (block = 0; block < 2; block++) {
3773                 bh = sb_bread(sb, block);
3774                 if (!bh) {
3775                         f2fs_err(sbi, "Unable to read %dth superblock",
3776                                  block + 1);
3777                         err = -EIO;
3778                         *recovery = 1;
3779                         continue;
3780                 }
3781
3782                 /* sanity checking of raw super */
3783                 err = sanity_check_raw_super(sbi, bh);
3784                 if (err) {
3785                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3786                                  block + 1);
3787                         brelse(bh);
3788                         *recovery = 1;
3789                         continue;
3790                 }
3791
3792                 if (!*raw_super) {
3793                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3794                                                         sizeof(*super));
3795                         *valid_super_block = block;
3796                         *raw_super = super;
3797                 }
3798                 brelse(bh);
3799         }
3800
3801         /* No valid superblock */
3802         if (!*raw_super)
3803                 kfree(super);
3804         else
3805                 err = 0;
3806
3807         return err;
3808 }
3809
3810 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3811 {
3812         struct buffer_head *bh;
3813         __u32 crc = 0;
3814         int err;
3815
3816         if ((recover && f2fs_readonly(sbi->sb)) ||
3817                                 bdev_read_only(sbi->sb->s_bdev)) {
3818                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3819                 return -EROFS;
3820         }
3821
3822         /* we should update superblock crc here */
3823         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3824                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3825                                 offsetof(struct f2fs_super_block, crc));
3826                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3827         }
3828
3829         /* write back-up superblock first */
3830         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3831         if (!bh)
3832                 return -EIO;
3833         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3834         brelse(bh);
3835
3836         /* if we are in recovery path, skip writing valid superblock */
3837         if (recover || err)
3838                 return err;
3839
3840         /* write current valid superblock */
3841         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3842         if (!bh)
3843                 return -EIO;
3844         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3845         brelse(bh);
3846         return err;
3847 }
3848
3849 void f2fs_handle_stop(struct f2fs_sb_info *sbi, unsigned char reason)
3850 {
3851         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3852         int err;
3853
3854         f2fs_down_write(&sbi->sb_lock);
3855
3856         if (raw_super->s_stop_reason[reason] < ((1 << BITS_PER_BYTE) - 1))
3857                 raw_super->s_stop_reason[reason]++;
3858
3859         err = f2fs_commit_super(sbi, false);
3860         if (err)
3861                 f2fs_err(sbi, "f2fs_commit_super fails to record reason:%u err:%d",
3862                                                                 reason, err);
3863         f2fs_up_write(&sbi->sb_lock);
3864 }
3865
3866 static void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
3867 {
3868         spin_lock(&sbi->error_lock);
3869         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
3870                 set_bit(flag, (unsigned long *)sbi->errors);
3871                 sbi->error_dirty = true;
3872         }
3873         spin_unlock(&sbi->error_lock);
3874 }
3875
3876 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
3877 {
3878         bool need_update = false;
3879
3880         spin_lock(&sbi->error_lock);
3881         if (sbi->error_dirty) {
3882                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
3883                                                         MAX_F2FS_ERRORS);
3884                 sbi->error_dirty = false;
3885                 need_update = true;
3886         }
3887         spin_unlock(&sbi->error_lock);
3888
3889         return need_update;
3890 }
3891
3892 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
3893 {
3894         int err;
3895
3896         f2fs_save_errors(sbi, error);
3897
3898         f2fs_down_write(&sbi->sb_lock);
3899
3900         if (!f2fs_update_errors(sbi))
3901                 goto out_unlock;
3902
3903         err = f2fs_commit_super(sbi, false);
3904         if (err)
3905                 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d",
3906                                                                 error, err);
3907 out_unlock:
3908         f2fs_up_write(&sbi->sb_lock);
3909 }
3910
3911 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3912 {
3913         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3914         unsigned int max_devices = MAX_DEVICES;
3915         unsigned int logical_blksize;
3916         int i;
3917
3918         /* Initialize single device information */
3919         if (!RDEV(0).path[0]) {
3920                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3921                         return 0;
3922                 max_devices = 1;
3923         }
3924
3925         /*
3926          * Initialize multiple devices information, or single
3927          * zoned block device information.
3928          */
3929         sbi->devs = f2fs_kzalloc(sbi,
3930                                  array_size(max_devices,
3931                                             sizeof(struct f2fs_dev_info)),
3932                                  GFP_KERNEL);
3933         if (!sbi->devs)
3934                 return -ENOMEM;
3935
3936         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3937         sbi->aligned_blksize = true;
3938
3939         for (i = 0; i < max_devices; i++) {
3940
3941                 if (i > 0 && !RDEV(i).path[0])
3942                         break;
3943
3944                 if (max_devices == 1) {
3945                         /* Single zoned block device mount */
3946                         FDEV(0).bdev =
3947                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3948                                         sbi->sb->s_mode, sbi->sb->s_type);
3949                 } else {
3950                         /* Multi-device mount */
3951                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3952                         FDEV(i).total_segments =
3953                                 le32_to_cpu(RDEV(i).total_segments);
3954                         if (i == 0) {
3955                                 FDEV(i).start_blk = 0;
3956                                 FDEV(i).end_blk = FDEV(i).start_blk +
3957                                     (FDEV(i).total_segments <<
3958                                     sbi->log_blocks_per_seg) - 1 +
3959                                     le32_to_cpu(raw_super->segment0_blkaddr);
3960                         } else {
3961                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3962                                 FDEV(i).end_blk = FDEV(i).start_blk +
3963                                         (FDEV(i).total_segments <<
3964                                         sbi->log_blocks_per_seg) - 1;
3965                         }
3966                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3967                                         sbi->sb->s_mode, sbi->sb->s_type);
3968                 }
3969                 if (IS_ERR(FDEV(i).bdev))
3970                         return PTR_ERR(FDEV(i).bdev);
3971
3972                 /* to release errored devices */
3973                 sbi->s_ndevs = i + 1;
3974
3975                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
3976                         sbi->aligned_blksize = false;
3977
3978 #ifdef CONFIG_BLK_DEV_ZONED
3979                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3980                                 !f2fs_sb_has_blkzoned(sbi)) {
3981                         f2fs_err(sbi, "Zoned block device feature not enabled");
3982                         return -EINVAL;
3983                 }
3984                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3985                         if (init_blkz_info(sbi, i)) {
3986                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3987                                 return -EINVAL;
3988                         }
3989                         if (max_devices == 1)
3990                                 break;
3991                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3992                                   i, FDEV(i).path,
3993                                   FDEV(i).total_segments,
3994                                   FDEV(i).start_blk, FDEV(i).end_blk,
3995                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3996                                   "Host-aware" : "Host-managed");
3997                         continue;
3998                 }
3999 #endif
4000                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4001                           i, FDEV(i).path,
4002                           FDEV(i).total_segments,
4003                           FDEV(i).start_blk, FDEV(i).end_blk);
4004         }
4005         f2fs_info(sbi,
4006                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
4007         return 0;
4008 }
4009
4010 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4011 {
4012 #if IS_ENABLED(CONFIG_UNICODE)
4013         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4014                 const struct f2fs_sb_encodings *encoding_info;
4015                 struct unicode_map *encoding;
4016                 __u16 encoding_flags;
4017
4018                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4019                 if (!encoding_info) {
4020                         f2fs_err(sbi,
4021                                  "Encoding requested by superblock is unknown");
4022                         return -EINVAL;
4023                 }
4024
4025                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4026                 encoding = utf8_load(encoding_info->version);
4027                 if (IS_ERR(encoding)) {
4028                         f2fs_err(sbi,
4029                                  "can't mount with superblock charset: %s-%u.%u.%u "
4030                                  "not supported by the kernel. flags: 0x%x.",
4031                                  encoding_info->name,
4032                                  unicode_major(encoding_info->version),
4033                                  unicode_minor(encoding_info->version),
4034                                  unicode_rev(encoding_info->version),
4035                                  encoding_flags);
4036                         return PTR_ERR(encoding);
4037                 }
4038                 f2fs_info(sbi, "Using encoding defined by superblock: "
4039                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4040                          unicode_major(encoding_info->version),
4041                          unicode_minor(encoding_info->version),
4042                          unicode_rev(encoding_info->version),
4043                          encoding_flags);
4044
4045                 sbi->sb->s_encoding = encoding;
4046                 sbi->sb->s_encoding_flags = encoding_flags;
4047         }
4048 #else
4049         if (f2fs_sb_has_casefold(sbi)) {
4050                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4051                 return -EINVAL;
4052         }
4053 #endif
4054         return 0;
4055 }
4056
4057 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4058 {
4059         struct f2fs_sm_info *sm_i = SM_I(sbi);
4060
4061         /* adjust parameters according to the volume size */
4062         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
4063                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
4064                 if (f2fs_block_unit_discard(sbi))
4065                         sm_i->dcc_info->discard_granularity = 1;
4066                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE |
4067                                         1 << F2FS_IPU_HONOR_OPU_WRITE;
4068         }
4069
4070         sbi->readdir_ra = 1;
4071 }
4072
4073 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4074 {
4075         struct f2fs_sb_info *sbi;
4076         struct f2fs_super_block *raw_super;
4077         struct inode *root;
4078         int err;
4079         bool skip_recovery = false, need_fsck = false;
4080         char *options = NULL;
4081         int recovery, i, valid_super_block;
4082         struct curseg_info *seg_i;
4083         int retry_cnt = 1;
4084
4085 try_onemore:
4086         err = -EINVAL;
4087         raw_super = NULL;
4088         valid_super_block = -1;
4089         recovery = 0;
4090
4091         /* allocate memory for f2fs-specific super block info */
4092         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4093         if (!sbi)
4094                 return -ENOMEM;
4095
4096         sbi->sb = sb;
4097
4098         /* Load the checksum driver */
4099         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4100         if (IS_ERR(sbi->s_chksum_driver)) {
4101                 f2fs_err(sbi, "Cannot load crc32 driver.");
4102                 err = PTR_ERR(sbi->s_chksum_driver);
4103                 sbi->s_chksum_driver = NULL;
4104                 goto free_sbi;
4105         }
4106
4107         /* set a block size */
4108         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4109                 f2fs_err(sbi, "unable to set blocksize");
4110                 goto free_sbi;
4111         }
4112
4113         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4114                                                                 &recovery);
4115         if (err)
4116                 goto free_sbi;
4117
4118         sb->s_fs_info = sbi;
4119         sbi->raw_super = raw_super;
4120
4121         /* precompute checksum seed for metadata */
4122         if (f2fs_sb_has_inode_chksum(sbi))
4123                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4124                                                 sizeof(raw_super->uuid));
4125
4126         default_options(sbi);
4127         /* parse mount options */
4128         options = kstrdup((const char *)data, GFP_KERNEL);
4129         if (data && !options) {
4130                 err = -ENOMEM;
4131                 goto free_sb_buf;
4132         }
4133
4134         err = parse_options(sb, options, false);
4135         if (err)
4136                 goto free_options;
4137
4138         sb->s_maxbytes = max_file_blocks(NULL) <<
4139                                 le32_to_cpu(raw_super->log_blocksize);
4140         sb->s_max_links = F2FS_LINK_MAX;
4141
4142         err = f2fs_setup_casefold(sbi);
4143         if (err)
4144                 goto free_options;
4145
4146 #ifdef CONFIG_QUOTA
4147         sb->dq_op = &f2fs_quota_operations;
4148         sb->s_qcop = &f2fs_quotactl_ops;
4149         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4150
4151         if (f2fs_sb_has_quota_ino(sbi)) {
4152                 for (i = 0; i < MAXQUOTAS; i++) {
4153                         if (f2fs_qf_ino(sbi->sb, i))
4154                                 sbi->nquota_files++;
4155                 }
4156         }
4157 #endif
4158
4159         sb->s_op = &f2fs_sops;
4160 #ifdef CONFIG_FS_ENCRYPTION
4161         sb->s_cop = &f2fs_cryptops;
4162 #endif
4163 #ifdef CONFIG_FS_VERITY
4164         sb->s_vop = &f2fs_verityops;
4165 #endif
4166         sb->s_xattr = f2fs_xattr_handlers;
4167         sb->s_export_op = &f2fs_export_ops;
4168         sb->s_magic = F2FS_SUPER_MAGIC;
4169         sb->s_time_gran = 1;
4170         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4171                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4172         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4173         sb->s_iflags |= SB_I_CGROUPWB;
4174
4175         /* init f2fs-specific super block info */
4176         sbi->valid_super_block = valid_super_block;
4177         init_f2fs_rwsem(&sbi->gc_lock);
4178         mutex_init(&sbi->writepages);
4179         init_f2fs_rwsem(&sbi->cp_global_sem);
4180         init_f2fs_rwsem(&sbi->node_write);
4181         init_f2fs_rwsem(&sbi->node_change);
4182
4183         /* disallow all the data/node/meta page writes */
4184         set_sbi_flag(sbi, SBI_POR_DOING);
4185         spin_lock_init(&sbi->stat_lock);
4186
4187         err = f2fs_init_write_merge_io(sbi);
4188         if (err)
4189                 goto free_bio_info;
4190
4191         init_f2fs_rwsem(&sbi->cp_rwsem);
4192         init_f2fs_rwsem(&sbi->quota_sem);
4193         init_waitqueue_head(&sbi->cp_wait);
4194         init_sb_info(sbi);
4195
4196         err = f2fs_init_iostat(sbi);
4197         if (err)
4198                 goto free_bio_info;
4199
4200         err = init_percpu_info(sbi);
4201         if (err)
4202                 goto free_iostat;
4203
4204         if (F2FS_IO_ALIGNED(sbi)) {
4205                 sbi->write_io_dummy =
4206                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4207                 if (!sbi->write_io_dummy) {
4208                         err = -ENOMEM;
4209                         goto free_percpu;
4210                 }
4211         }
4212
4213         /* init per sbi slab cache */
4214         err = f2fs_init_xattr_caches(sbi);
4215         if (err)
4216                 goto free_io_dummy;
4217         err = f2fs_init_page_array_cache(sbi);
4218         if (err)
4219                 goto free_xattr_cache;
4220
4221         /* get an inode for meta space */
4222         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4223         if (IS_ERR(sbi->meta_inode)) {
4224                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4225                 err = PTR_ERR(sbi->meta_inode);
4226                 goto free_page_array_cache;
4227         }
4228
4229         err = f2fs_get_valid_checkpoint(sbi);
4230         if (err) {
4231                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4232                 goto free_meta_inode;
4233         }
4234
4235         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4236                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4237         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4238                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4239                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4240         }
4241
4242         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4243                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4244
4245         /* Initialize device list */
4246         err = f2fs_scan_devices(sbi);
4247         if (err) {
4248                 f2fs_err(sbi, "Failed to find devices");
4249                 goto free_devices;
4250         }
4251
4252         err = f2fs_init_post_read_wq(sbi);
4253         if (err) {
4254                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4255                 goto free_devices;
4256         }
4257
4258         spin_lock_init(&sbi->error_lock);
4259         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4260
4261         sbi->total_valid_node_count =
4262                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4263         percpu_counter_set(&sbi->total_valid_inode_count,
4264                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4265         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4266         sbi->total_valid_block_count =
4267                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4268         sbi->last_valid_block_count = sbi->total_valid_block_count;
4269         sbi->reserved_blocks = 0;
4270         sbi->current_reserved_blocks = 0;
4271         limit_reserve_root(sbi);
4272         adjust_unusable_cap_perc(sbi);
4273
4274         for (i = 0; i < NR_INODE_TYPE; i++) {
4275                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4276                 spin_lock_init(&sbi->inode_lock[i]);
4277         }
4278         mutex_init(&sbi->flush_lock);
4279
4280         f2fs_init_extent_cache_info(sbi);
4281
4282         f2fs_init_ino_entry_info(sbi);
4283
4284         f2fs_init_fsync_node_info(sbi);
4285
4286         /* setup checkpoint request control and start checkpoint issue thread */
4287         f2fs_init_ckpt_req_control(sbi);
4288         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4289                         test_opt(sbi, MERGE_CHECKPOINT)) {
4290                 err = f2fs_start_ckpt_thread(sbi);
4291                 if (err) {
4292                         f2fs_err(sbi,
4293                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4294                             err);
4295                         goto stop_ckpt_thread;
4296                 }
4297         }
4298
4299         /* setup f2fs internal modules */
4300         err = f2fs_build_segment_manager(sbi);
4301         if (err) {
4302                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4303                          err);
4304                 goto free_sm;
4305         }
4306         err = f2fs_build_node_manager(sbi);
4307         if (err) {
4308                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4309                          err);
4310                 goto free_nm;
4311         }
4312
4313         err = adjust_reserved_segment(sbi);
4314         if (err)
4315                 goto free_nm;
4316
4317         /* For write statistics */
4318         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4319
4320         /* Read accumulated write IO statistics if exists */
4321         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4322         if (__exist_node_summaries(sbi))
4323                 sbi->kbytes_written =
4324                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4325
4326         f2fs_build_gc_manager(sbi);
4327
4328         err = f2fs_build_stats(sbi);
4329         if (err)
4330                 goto free_nm;
4331
4332         /* get an inode for node space */
4333         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4334         if (IS_ERR(sbi->node_inode)) {
4335                 f2fs_err(sbi, "Failed to read node inode");
4336                 err = PTR_ERR(sbi->node_inode);
4337                 goto free_stats;
4338         }
4339
4340         /* read root inode and dentry */
4341         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4342         if (IS_ERR(root)) {
4343                 f2fs_err(sbi, "Failed to read root inode");
4344                 err = PTR_ERR(root);
4345                 goto free_node_inode;
4346         }
4347         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4348                         !root->i_size || !root->i_nlink) {
4349                 iput(root);
4350                 err = -EINVAL;
4351                 goto free_node_inode;
4352         }
4353
4354         sb->s_root = d_make_root(root); /* allocate root dentry */
4355         if (!sb->s_root) {
4356                 err = -ENOMEM;
4357                 goto free_node_inode;
4358         }
4359
4360         err = f2fs_init_compress_inode(sbi);
4361         if (err)
4362                 goto free_root_inode;
4363
4364         err = f2fs_register_sysfs(sbi);
4365         if (err)
4366                 goto free_compress_inode;
4367
4368 #ifdef CONFIG_QUOTA
4369         /* Enable quota usage during mount */
4370         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4371                 err = f2fs_enable_quotas(sb);
4372                 if (err)
4373                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4374         }
4375 #endif
4376         /* if there are any orphan inodes, free them */
4377         err = f2fs_recover_orphan_inodes(sbi);
4378         if (err)
4379                 goto free_meta;
4380
4381         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4382                 goto reset_checkpoint;
4383
4384         /* recover fsynced data */
4385         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4386                         !test_opt(sbi, NORECOVERY)) {
4387                 /*
4388                  * mount should be failed, when device has readonly mode, and
4389                  * previous checkpoint was not done by clean system shutdown.
4390                  */
4391                 if (f2fs_hw_is_readonly(sbi)) {
4392                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4393                                 err = f2fs_recover_fsync_data(sbi, true);
4394                                 if (err > 0) {
4395                                         err = -EROFS;
4396                                         f2fs_err(sbi, "Need to recover fsync data, but "
4397                                                 "write access unavailable, please try "
4398                                                 "mount w/ disable_roll_forward or norecovery");
4399                                 }
4400                                 if (err < 0)
4401                                         goto free_meta;
4402                         }
4403                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4404                         goto reset_checkpoint;
4405                 }
4406
4407                 if (need_fsck)
4408                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4409
4410                 if (skip_recovery)
4411                         goto reset_checkpoint;
4412
4413                 err = f2fs_recover_fsync_data(sbi, false);
4414                 if (err < 0) {
4415                         if (err != -ENOMEM)
4416                                 skip_recovery = true;
4417                         need_fsck = true;
4418                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4419                                  err);
4420                         goto free_meta;
4421                 }
4422         } else {
4423                 err = f2fs_recover_fsync_data(sbi, true);
4424
4425                 if (!f2fs_readonly(sb) && err > 0) {
4426                         err = -EINVAL;
4427                         f2fs_err(sbi, "Need to recover fsync data");
4428                         goto free_meta;
4429                 }
4430         }
4431
4432         /*
4433          * If the f2fs is not readonly and fsync data recovery succeeds,
4434          * check zoned block devices' write pointer consistency.
4435          */
4436         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4437                 err = f2fs_check_write_pointer(sbi);
4438                 if (err)
4439                         goto free_meta;
4440         }
4441
4442 reset_checkpoint:
4443         f2fs_init_inmem_curseg(sbi);
4444
4445         /* f2fs_recover_fsync_data() cleared this already */
4446         clear_sbi_flag(sbi, SBI_POR_DOING);
4447
4448         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4449                 err = f2fs_disable_checkpoint(sbi);
4450                 if (err)
4451                         goto sync_free_meta;
4452         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4453                 f2fs_enable_checkpoint(sbi);
4454         }
4455
4456         /*
4457          * If filesystem is not mounted as read-only then
4458          * do start the gc_thread.
4459          */
4460         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4461                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4462                 /* After POR, we can run background GC thread.*/
4463                 err = f2fs_start_gc_thread(sbi);
4464                 if (err)
4465                         goto sync_free_meta;
4466         }
4467         kvfree(options);
4468
4469         /* recover broken superblock */
4470         if (recovery) {
4471                 err = f2fs_commit_super(sbi, true);
4472                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4473                           sbi->valid_super_block ? 1 : 2, err);
4474         }
4475
4476         f2fs_join_shrinker(sbi);
4477
4478         f2fs_tuning_parameters(sbi);
4479
4480         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4481                     cur_cp_version(F2FS_CKPT(sbi)));
4482         f2fs_update_time(sbi, CP_TIME);
4483         f2fs_update_time(sbi, REQ_TIME);
4484         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4485         return 0;
4486
4487 sync_free_meta:
4488         /* safe to flush all the data */
4489         sync_filesystem(sbi->sb);
4490         retry_cnt = 0;
4491
4492 free_meta:
4493 #ifdef CONFIG_QUOTA
4494         f2fs_truncate_quota_inode_pages(sb);
4495         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4496                 f2fs_quota_off_umount(sbi->sb);
4497 #endif
4498         /*
4499          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4500          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4501          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4502          * falls into an infinite loop in f2fs_sync_meta_pages().
4503          */
4504         truncate_inode_pages_final(META_MAPPING(sbi));
4505         /* evict some inodes being cached by GC */
4506         evict_inodes(sb);
4507         f2fs_unregister_sysfs(sbi);
4508 free_compress_inode:
4509         f2fs_destroy_compress_inode(sbi);
4510 free_root_inode:
4511         dput(sb->s_root);
4512         sb->s_root = NULL;
4513 free_node_inode:
4514         f2fs_release_ino_entry(sbi, true);
4515         truncate_inode_pages_final(NODE_MAPPING(sbi));
4516         iput(sbi->node_inode);
4517         sbi->node_inode = NULL;
4518 free_stats:
4519         f2fs_destroy_stats(sbi);
4520 free_nm:
4521         /* stop discard thread before destroying node manager */
4522         f2fs_stop_discard_thread(sbi);
4523         f2fs_destroy_node_manager(sbi);
4524 free_sm:
4525         f2fs_destroy_segment_manager(sbi);
4526         f2fs_destroy_post_read_wq(sbi);
4527 stop_ckpt_thread:
4528         f2fs_stop_ckpt_thread(sbi);
4529 free_devices:
4530         destroy_device_list(sbi);
4531         kvfree(sbi->ckpt);
4532 free_meta_inode:
4533         make_bad_inode(sbi->meta_inode);
4534         iput(sbi->meta_inode);
4535         sbi->meta_inode = NULL;
4536 free_page_array_cache:
4537         f2fs_destroy_page_array_cache(sbi);
4538 free_xattr_cache:
4539         f2fs_destroy_xattr_caches(sbi);
4540 free_io_dummy:
4541         mempool_destroy(sbi->write_io_dummy);
4542 free_percpu:
4543         destroy_percpu_info(sbi);
4544 free_iostat:
4545         f2fs_destroy_iostat(sbi);
4546 free_bio_info:
4547         for (i = 0; i < NR_PAGE_TYPE; i++)
4548                 kvfree(sbi->write_io[i]);
4549
4550 #if IS_ENABLED(CONFIG_UNICODE)
4551         utf8_unload(sb->s_encoding);
4552         sb->s_encoding = NULL;
4553 #endif
4554 free_options:
4555 #ifdef CONFIG_QUOTA
4556         for (i = 0; i < MAXQUOTAS; i++)
4557                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4558 #endif
4559         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4560         kvfree(options);
4561 free_sb_buf:
4562         kfree(raw_super);
4563 free_sbi:
4564         if (sbi->s_chksum_driver)
4565                 crypto_free_shash(sbi->s_chksum_driver);
4566         kfree(sbi);
4567
4568         /* give only one another chance */
4569         if (retry_cnt > 0 && skip_recovery) {
4570                 retry_cnt--;
4571                 shrink_dcache_sb(sb);
4572                 goto try_onemore;
4573         }
4574         return err;
4575 }
4576
4577 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4578                         const char *dev_name, void *data)
4579 {
4580         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4581 }
4582
4583 static void kill_f2fs_super(struct super_block *sb)
4584 {
4585         if (sb->s_root) {
4586                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4587
4588                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4589                 f2fs_stop_gc_thread(sbi);
4590                 f2fs_stop_discard_thread(sbi);
4591
4592 #ifdef CONFIG_F2FS_FS_COMPRESSION
4593                 /*
4594                  * latter evict_inode() can bypass checking and invalidating
4595                  * compress inode cache.
4596                  */
4597                 if (test_opt(sbi, COMPRESS_CACHE))
4598                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4599 #endif
4600
4601                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4602                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4603                         struct cp_control cpc = {
4604                                 .reason = CP_UMOUNT,
4605                         };
4606                         f2fs_write_checkpoint(sbi, &cpc);
4607                 }
4608
4609                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4610                         sb->s_flags &= ~SB_RDONLY;
4611         }
4612         kill_block_super(sb);
4613 }
4614
4615 static struct file_system_type f2fs_fs_type = {
4616         .owner          = THIS_MODULE,
4617         .name           = "f2fs",
4618         .mount          = f2fs_mount,
4619         .kill_sb        = kill_f2fs_super,
4620         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4621 };
4622 MODULE_ALIAS_FS("f2fs");
4623
4624 static int __init init_inodecache(void)
4625 {
4626         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4627                         sizeof(struct f2fs_inode_info), 0,
4628                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4629         if (!f2fs_inode_cachep)
4630                 return -ENOMEM;
4631         return 0;
4632 }
4633
4634 static void destroy_inodecache(void)
4635 {
4636         /*
4637          * Make sure all delayed rcu free inodes are flushed before we
4638          * destroy cache.
4639          */
4640         rcu_barrier();
4641         kmem_cache_destroy(f2fs_inode_cachep);
4642 }
4643
4644 static int __init init_f2fs_fs(void)
4645 {
4646         int err;
4647
4648         if (PAGE_SIZE != F2FS_BLKSIZE) {
4649                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4650                                 PAGE_SIZE, F2FS_BLKSIZE);
4651                 return -EINVAL;
4652         }
4653
4654         err = init_inodecache();
4655         if (err)
4656                 goto fail;
4657         err = f2fs_create_node_manager_caches();
4658         if (err)
4659                 goto free_inodecache;
4660         err = f2fs_create_segment_manager_caches();
4661         if (err)
4662                 goto free_node_manager_caches;
4663         err = f2fs_create_checkpoint_caches();
4664         if (err)
4665                 goto free_segment_manager_caches;
4666         err = f2fs_create_recovery_cache();
4667         if (err)
4668                 goto free_checkpoint_caches;
4669         err = f2fs_create_extent_cache();
4670         if (err)
4671                 goto free_recovery_cache;
4672         err = f2fs_create_garbage_collection_cache();
4673         if (err)
4674                 goto free_extent_cache;
4675         err = f2fs_init_sysfs();
4676         if (err)
4677                 goto free_garbage_collection_cache;
4678         err = register_shrinker(&f2fs_shrinker_info, "f2fs-shrinker");
4679         if (err)
4680                 goto free_sysfs;
4681         err = register_filesystem(&f2fs_fs_type);
4682         if (err)
4683                 goto free_shrinker;
4684         f2fs_create_root_stats();
4685         err = f2fs_init_post_read_processing();
4686         if (err)
4687                 goto free_root_stats;
4688         err = f2fs_init_iostat_processing();
4689         if (err)
4690                 goto free_post_read;
4691         err = f2fs_init_bio_entry_cache();
4692         if (err)
4693                 goto free_iostat;
4694         err = f2fs_init_bioset();
4695         if (err)
4696                 goto free_bio_enrty_cache;
4697         err = f2fs_init_compress_mempool();
4698         if (err)
4699                 goto free_bioset;
4700         err = f2fs_init_compress_cache();
4701         if (err)
4702                 goto free_compress_mempool;
4703         err = f2fs_create_casefold_cache();
4704         if (err)
4705                 goto free_compress_cache;
4706         return 0;
4707 free_compress_cache:
4708         f2fs_destroy_compress_cache();
4709 free_compress_mempool:
4710         f2fs_destroy_compress_mempool();
4711 free_bioset:
4712         f2fs_destroy_bioset();
4713 free_bio_enrty_cache:
4714         f2fs_destroy_bio_entry_cache();
4715 free_iostat:
4716         f2fs_destroy_iostat_processing();
4717 free_post_read:
4718         f2fs_destroy_post_read_processing();
4719 free_root_stats:
4720         f2fs_destroy_root_stats();
4721         unregister_filesystem(&f2fs_fs_type);
4722 free_shrinker:
4723         unregister_shrinker(&f2fs_shrinker_info);
4724 free_sysfs:
4725         f2fs_exit_sysfs();
4726 free_garbage_collection_cache:
4727         f2fs_destroy_garbage_collection_cache();
4728 free_extent_cache:
4729         f2fs_destroy_extent_cache();
4730 free_recovery_cache:
4731         f2fs_destroy_recovery_cache();
4732 free_checkpoint_caches:
4733         f2fs_destroy_checkpoint_caches();
4734 free_segment_manager_caches:
4735         f2fs_destroy_segment_manager_caches();
4736 free_node_manager_caches:
4737         f2fs_destroy_node_manager_caches();
4738 free_inodecache:
4739         destroy_inodecache();
4740 fail:
4741         return err;
4742 }
4743
4744 static void __exit exit_f2fs_fs(void)
4745 {
4746         f2fs_destroy_casefold_cache();
4747         f2fs_destroy_compress_cache();
4748         f2fs_destroy_compress_mempool();
4749         f2fs_destroy_bioset();
4750         f2fs_destroy_bio_entry_cache();
4751         f2fs_destroy_iostat_processing();
4752         f2fs_destroy_post_read_processing();
4753         f2fs_destroy_root_stats();
4754         unregister_filesystem(&f2fs_fs_type);
4755         unregister_shrinker(&f2fs_shrinker_info);
4756         f2fs_exit_sysfs();
4757         f2fs_destroy_garbage_collection_cache();
4758         f2fs_destroy_extent_cache();
4759         f2fs_destroy_recovery_cache();
4760         f2fs_destroy_checkpoint_caches();
4761         f2fs_destroy_segment_manager_caches();
4762         f2fs_destroy_node_manager_caches();
4763         destroy_inodecache();
4764 }
4765
4766 module_init(init_f2fs_fs)
4767 module_exit(exit_f2fs_fs)
4768
4769 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4770 MODULE_DESCRIPTION("Flash Friendly File System");
4771 MODULE_LICENSE("GPL");
4772 MODULE_SOFTDEP("pre: crc32");
4773