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/sched/mm.h>
  12 #include <linux/statfs.h>
  13 #include <linux/buffer_head.h>
  14 #include <linux/kthread.h>
  15 #include <linux/parser.h>
  16 #include <linux/mount.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/random.h>
  20 #include <linux/exportfs.h>
  21 #include <linux/blkdev.h>
  22 #include <linux/quotaops.h>
  23 #include <linux/f2fs_fs.h>
  24 #include <linux/sysfs.h>
  25 #include <linux/quota.h>
  26 #include <linux/unicode.h>
  27 #include <linux/part_stat.h>
  28 #include <linux/zstd.h>
  29 #include <linux/lz4.h>
  30
  31 #include "f2fs.h"
  32 #include "node.h"
  33 #include "segment.h"
  34 #include "xattr.h"
  35 #include "gc.h"
  36 #include "iostat.h"
  37
  38 #define CREATE_TRACE_POINTS
  39 #include <trace/events/f2fs.h>
  40
  41 static struct kmem_cache *f2fs_inode_cachep;
  42
  43 #ifdef CONFIG_F2FS_FAULT_INJECTION
  44
  45 const char *f2fs_fault_name[FAULT_MAX] = {
  46         [FAULT_KMALLOC]         = "kmalloc",
  47         [FAULT_KVMALLOC]        = "kvmalloc",
  48         [FAULT_PAGE_ALLOC]      = "page alloc",
  49         [FAULT_PAGE_GET]        = "page get",
  50         [FAULT_ALLOC_NID]       = "alloc nid",
  51         [FAULT_ORPHAN]          = "orphan",
  52         [FAULT_BLOCK]           = "no more block",
  53         [FAULT_DIR_DEPTH]       = "too big dir depth",
  54         [FAULT_EVICT_INODE]     = "evict_inode fail",
  55         [FAULT_TRUNCATE]        = "truncate fail",
  56         [FAULT_READ_IO]         = "read IO error",
  57         [FAULT_CHECKPOINT]      = "checkpoint error",
  58         [FAULT_DISCARD]         = "discard error",
  59         [FAULT_WRITE_IO]        = "write IO error",
  60         [FAULT_SLAB_ALLOC]      = "slab alloc",
  61         [FAULT_DQUOT_INIT]      = "dquot initialize",
  62         [FAULT_LOCK_OP]         = "lock_op",
  63 };
  64
  65 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  66                                                         unsigned int type)
  67 {
  68         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  69
  70         if (rate) {
  71                 atomic_set(&ffi->inject_ops, 0);
  72                 ffi->inject_rate = rate;
  73         }
  74
  75         if (type)
  76                 ffi->inject_type = type;
  77
  78         if (!rate && !type)
  79                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  80 }
  81 #endif
  82
  83 /* f2fs-wide shrinker description */
  84 static struct shrinker f2fs_shrinker_info = {
  85         .scan_objects = f2fs_shrink_scan,
  86         .count_objects = f2fs_shrink_count,
  87         .seeks = DEFAULT_SEEKS,
  88 };
  89
  90 enum {
  91         Opt_gc_background,
  92         Opt_disable_roll_forward,
  93         Opt_norecovery,
  94         Opt_discard,
  95         Opt_nodiscard,
  96         Opt_noheap,
  97         Opt_heap,
  98         Opt_user_xattr,
  99         Opt_nouser_xattr,
 100         Opt_acl,
 101         Opt_noacl,
 102         Opt_active_logs,
 103         Opt_disable_ext_identify,
 104         Opt_inline_xattr,
 105         Opt_noinline_xattr,
 106         Opt_inline_xattr_size,
 107         Opt_inline_data,
 108         Opt_inline_dentry,
 109         Opt_noinline_dentry,
 110         Opt_flush_merge,
 111         Opt_noflush_merge,
 112         Opt_nobarrier,
 113         Opt_fastboot,
 114         Opt_extent_cache,
 115         Opt_noextent_cache,
 116         Opt_noinline_data,
 117         Opt_data_flush,
 118         Opt_reserve_root,
 119         Opt_resgid,
 120         Opt_resuid,
 121         Opt_mode,
 122         Opt_io_size_bits,
 123         Opt_fault_injection,
 124         Opt_fault_type,
 125         Opt_lazytime,
 126         Opt_nolazytime,
 127         Opt_quota,
 128         Opt_noquota,
 129         Opt_usrquota,
 130         Opt_grpquota,
 131         Opt_prjquota,
 132         Opt_usrjquota,
 133         Opt_grpjquota,
 134         Opt_prjjquota,
 135         Opt_offusrjquota,
 136         Opt_offgrpjquota,
 137         Opt_offprjjquota,
 138         Opt_jqfmt_vfsold,
 139         Opt_jqfmt_vfsv0,
 140         Opt_jqfmt_vfsv1,
 141         Opt_whint,
 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_err,
 164 };
 165
 166 static match_table_t f2fs_tokens = {
 167         {Opt_gc_background, "background_gc=%s"},
 168         {Opt_disable_roll_forward, "disable_roll_forward"},
 169         {Opt_norecovery, "norecovery"},
 170         {Opt_discard, "discard"},
 171         {Opt_nodiscard, "nodiscard"},
 172         {Opt_noheap, "no_heap"},
 173         {Opt_heap, "heap"},
 174         {Opt_user_xattr, "user_xattr"},
 175         {Opt_nouser_xattr, "nouser_xattr"},
 176         {Opt_acl, "acl"},
 177         {Opt_noacl, "noacl"},
 178         {Opt_active_logs, "active_logs=%u"},
 179         {Opt_disable_ext_identify, "disable_ext_identify"},
 180         {Opt_inline_xattr, "inline_xattr"},
 181         {Opt_noinline_xattr, "noinline_xattr"},
 182         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 183         {Opt_inline_data, "inline_data"},
 184         {Opt_inline_dentry, "inline_dentry"},
 185         {Opt_noinline_dentry, "noinline_dentry"},
 186         {Opt_flush_merge, "flush_merge"},
 187         {Opt_noflush_merge, "noflush_merge"},
 188         {Opt_nobarrier, "nobarrier"},
 189         {Opt_fastboot, "fastboot"},
 190         {Opt_extent_cache, "extent_cache"},
 191         {Opt_noextent_cache, "noextent_cache"},
 192         {Opt_noinline_data, "noinline_data"},
 193         {Opt_data_flush, "data_flush"},
 194         {Opt_reserve_root, "reserve_root=%u"},
 195         {Opt_resgid, "resgid=%u"},
 196         {Opt_resuid, "resuid=%u"},
 197         {Opt_mode, "mode=%s"},
 198         {Opt_io_size_bits, "io_bits=%u"},
 199         {Opt_fault_injection, "fault_injection=%u"},
 200         {Opt_fault_type, "fault_type=%u"},
 201         {Opt_lazytime, "lazytime"},
 202         {Opt_nolazytime, "nolazytime"},
 203         {Opt_quota, "quota"},
 204         {Opt_noquota, "noquota"},
 205         {Opt_usrquota, "usrquota"},
 206         {Opt_grpquota, "grpquota"},
 207         {Opt_prjquota, "prjquota"},
 208         {Opt_usrjquota, "usrjquota=%s"},
 209         {Opt_grpjquota, "grpjquota=%s"},
 210         {Opt_prjjquota, "prjjquota=%s"},
 211         {Opt_offusrjquota, "usrjquota="},
 212         {Opt_offgrpjquota, "grpjquota="},
 213         {Opt_offprjjquota, "prjjquota="},
 214         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 215         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 216         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 217         {Opt_whint, "whint_mode=%s"},
 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_err, NULL},
 241 };
 242
 243 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 244 {
 245         struct va_format vaf;
 246         va_list args;
 247         int level;
 248
 249         va_start(args, fmt);
 250
 251         level = printk_get_level(fmt);
 252         vaf.fmt = printk_skip_level(fmt);
 253         vaf.va = &args;
 254         printk("%c%cF2FS-fs (%s): %pV\n",
 255                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 256
 257         va_end(args);
 258 }
 259
 260 #if IS_ENABLED(CONFIG_UNICODE)
 261 static const struct f2fs_sb_encodings {
 262         __u16 magic;
 263         char *name;
 264         unsigned int version;
 265 } f2fs_sb_encoding_map[] = {
 266         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 267 };
 268
 269 static const struct f2fs_sb_encodings *
 270 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 271 {
 272         __u16 magic = le16_to_cpu(sb->s_encoding);
 273         int i;
 274
 275         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 276                 if (magic == f2fs_sb_encoding_map[i].magic)
 277                         return &f2fs_sb_encoding_map[i];
 278
 279         return NULL;
 280 }
 281
 282 struct kmem_cache *f2fs_cf_name_slab;
 283 static int __init f2fs_create_casefold_cache(void)
 284 {
 285         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 286                                                         F2FS_NAME_LEN);
 287         if (!f2fs_cf_name_slab)
 288                 return -ENOMEM;
 289         return 0;
 290 }
 291
 292 static void f2fs_destroy_casefold_cache(void)
 293 {
 294         kmem_cache_destroy(f2fs_cf_name_slab);
 295 }
 296 #else
 297 static int __init f2fs_create_casefold_cache(void) { return 0; }
 298 static void f2fs_destroy_casefold_cache(void) { }
 299 #endif
 300
 301 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 302 {
 303         block_t limit = min((sbi->user_block_count << 1) / 1000,
 304                         sbi->user_block_count - sbi->reserved_blocks);
 305
 306         /* limit is 0.2% */
 307         if (test_opt(sbi, RESERVE_ROOT) &&
 308                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 309                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 310                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 311                           F2FS_OPTION(sbi).root_reserved_blocks);
 312         }
 313         if (!test_opt(sbi, RESERVE_ROOT) &&
 314                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 315                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 316                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 317                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 318                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 319                           from_kuid_munged(&init_user_ns,
 320                                            F2FS_OPTION(sbi).s_resuid),
 321                           from_kgid_munged(&init_user_ns,
 322                                            F2FS_OPTION(sbi).s_resgid));
 323 }
 324
 325 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 326 {
 327         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 328         unsigned int avg_vblocks;
 329         unsigned int wanted_reserved_segments;
 330         block_t avail_user_block_count;
 331
 332         if (!F2FS_IO_ALIGNED(sbi))
 333                 return 0;
 334
 335         /* average valid block count in section in worst case */
 336         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 337
 338         /*
 339          * we need enough free space when migrating one section in worst case
 340          */
 341         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 342                                                 reserved_segments(sbi);
 343         wanted_reserved_segments -= reserved_segments(sbi);
 344
 345         avail_user_block_count = sbi->user_block_count -
 346                                 sbi->current_reserved_blocks -
 347                                 F2FS_OPTION(sbi).root_reserved_blocks;
 348
 349         if (wanted_reserved_segments * sbi->blocks_per_seg >
 350                                         avail_user_block_count) {
 351                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 352                         wanted_reserved_segments,
 353                         avail_user_block_count >> sbi->log_blocks_per_seg);
 354                 return -ENOSPC;
 355         }
 356
 357         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 358
 359         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 360                          wanted_reserved_segments);
 361
 362         return 0;
 363 }
 364
 365 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 366 {
 367         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 368                 return;
 369
 370         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 371                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 372         else
 373                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 374                                         F2FS_OPTION(sbi).unusable_cap_perc;
 375
 376         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 377                         F2FS_OPTION(sbi).unusable_cap,
 378                         F2FS_OPTION(sbi).unusable_cap_perc);
 379 }
 380
 381 static void init_once(void *foo)
 382 {
 383         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 384
 385         inode_init_once(&fi->vfs_inode);
 386 }
 387
 388 #ifdef CONFIG_QUOTA
 389 static const char * const quotatypes[] = INITQFNAMES;
 390 #define QTYPE2NAME(t) (quotatypes[t])
 391 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 392                                                         substring_t *args)
 393 {
 394         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 395         char *qname;
 396         int ret = -EINVAL;
 397
 398         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 399                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 400                 return -EINVAL;
 401         }
 402         if (f2fs_sb_has_quota_ino(sbi)) {
 403                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 404                 return 0;
 405         }
 406
 407         qname = match_strdup(args);
 408         if (!qname) {
 409                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 410                 return -ENOMEM;
 411         }
 412         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 413                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 414                         ret = 0;
 415                 else
 416                         f2fs_err(sbi, "%s quota file already specified",
 417                                  QTYPE2NAME(qtype));
 418                 goto errout;
 419         }
 420         if (strchr(qname, '/')) {
 421                 f2fs_err(sbi, "quotafile must be on filesystem root");
 422                 goto errout;
 423         }
 424         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 425         set_opt(sbi, QUOTA);
 426         return 0;
 427 errout:
 428         kfree(qname);
 429         return ret;
 430 }
 431
 432 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 433 {
 434         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 435
 436         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 437                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 438                 return -EINVAL;
 439         }
 440         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 441         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 442         return 0;
 443 }
 444
 445 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 446 {
 447         /*
 448          * We do the test below only for project quotas. 'usrquota' and
 449          * 'grpquota' mount options are allowed even without quota feature
 450          * to support legacy quotas in quota files.
 451          */
 452         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 453                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 454                 return -1;
 455         }
 456         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 457                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 458                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 459                 if (test_opt(sbi, USRQUOTA) &&
 460                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 461                         clear_opt(sbi, USRQUOTA);
 462
 463                 if (test_opt(sbi, GRPQUOTA) &&
 464                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 465                         clear_opt(sbi, GRPQUOTA);
 466
 467                 if (test_opt(sbi, PRJQUOTA) &&
 468                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 469                         clear_opt(sbi, PRJQUOTA);
 470
 471                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 472                                 test_opt(sbi, PRJQUOTA)) {
 473                         f2fs_err(sbi, "old and new quota format mixing");
 474                         return -1;
 475                 }
 476
 477                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 478                         f2fs_err(sbi, "journaled quota format not specified");
 479                         return -1;
 480                 }
 481         }
 482
 483         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 484                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 485                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 486         }
 487         return 0;
 488 }
 489 #endif
 490
 491 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 492                                           const char *opt,
 493                                           const substring_t *arg,
 494                                           bool is_remount)
 495 {
 496         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 497 #ifdef CONFIG_FS_ENCRYPTION
 498         int err;
 499
 500         if (!f2fs_sb_has_encrypt(sbi)) {
 501                 f2fs_err(sbi, "Encrypt feature is off");
 502                 return -EINVAL;
 503         }
 504
 505         /*
 506          * This mount option is just for testing, and it's not worthwhile to
 507          * implement the extra complexity (e.g. RCU protection) that would be
 508          * needed to allow it to be set or changed during remount.  We do allow
 509          * it to be specified during remount, but only if there is no change.
 510          */
 511         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 512                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 513                 return -EINVAL;
 514         }
 515         err = fscrypt_set_test_dummy_encryption(
 516                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 517         if (err) {
 518                 if (err == -EEXIST)
 519                         f2fs_warn(sbi,
 520                                   "Can't change test_dummy_encryption on remount");
 521                 else if (err == -EINVAL)
 522                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 523                                   opt);
 524                 else
 525                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 526                                   opt, err);
 527                 return -EINVAL;
 528         }
 529         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 530 #else
 531         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 532 #endif
 533         return 0;
 534 }
 535
 536 #ifdef CONFIG_F2FS_FS_COMPRESSION
 537 /*
 538  * 1. The same extension name cannot not appear in both compress and non-compress extension
 539  * at the same time.
 540  * 2. If the compress extension specifies all files, the types specified by the non-compress
 541  * extension will be treated as special cases and will not be compressed.
 542  * 3. Don't allow the non-compress extension specifies all files.
 543  */
 544 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 545 {
 546         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 547         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 548         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 549
 550         ext = F2FS_OPTION(sbi).extensions;
 551         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 552         noext = F2FS_OPTION(sbi).noextensions;
 553         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 554
 555         if (!noext_cnt)
 556                 return 0;
 557
 558         for (no_index = 0; no_index < noext_cnt; no_index++) {
 559                 if (!strcasecmp("*", noext[no_index])) {
 560                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 561                         return -EINVAL;
 562                 }
 563                 for (index = 0; index < ext_cnt; index++) {
 564                         if (!strcasecmp(ext[index], noext[no_index])) {
 565                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 566                                                 ext[index]);
 567                                 return -EINVAL;
 568                         }
 569                 }
 570         }
 571         return 0;
 572 }
 573
 574 #ifdef CONFIG_F2FS_FS_LZ4
 575 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 576 {
 577 #ifdef CONFIG_F2FS_FS_LZ4HC
 578         unsigned int level;
 579 #endif
 580
 581         if (strlen(str) == 3) {
 582                 F2FS_OPTION(sbi).compress_level = 0;
 583                 return 0;
 584         }
 585
 586 #ifdef CONFIG_F2FS_FS_LZ4HC
 587         str += 3;
 588
 589         if (str[0] != ':') {
 590                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 591                 return -EINVAL;
 592         }
 593         if (kstrtouint(str + 1, 10, &level))
 594                 return -EINVAL;
 595
 596         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 597                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 598                 return -EINVAL;
 599         }
 600
 601         F2FS_OPTION(sbi).compress_level = level;
 602         return 0;
 603 #else
 604         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 605         return -EINVAL;
 606 #endif
 607 }
 608 #endif
 609
 610 #ifdef CONFIG_F2FS_FS_ZSTD
 611 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 612 {
 613         unsigned int level;
 614         int len = 4;
 615
 616         if (strlen(str) == len) {
 617                 F2FS_OPTION(sbi).compress_level = 0;
 618                 return 0;
 619         }
 620
 621         str += len;
 622
 623         if (str[0] != ':') {
 624                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 625                 return -EINVAL;
 626         }
 627         if (kstrtouint(str + 1, 10, &level))
 628                 return -EINVAL;
 629
 630         if (!level || level > zstd_max_clevel()) {
 631                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 632                 return -EINVAL;
 633         }
 634
 635         F2FS_OPTION(sbi).compress_level = level;
 636         return 0;
 637 }
 638 #endif
 639 #endif
 640
 641 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 642 {
 643         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 644         substring_t args[MAX_OPT_ARGS];
 645 #ifdef CONFIG_F2FS_FS_COMPRESSION
 646         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 647         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 648         int ext_cnt, noext_cnt;
 649 #endif
 650         char *p, *name;
 651         int arg = 0;
 652         kuid_t uid;
 653         kgid_t gid;
 654         int ret;
 655
 656         if (!options)
 657                 goto default_check;
 658
 659         while ((p = strsep(&options, ",")) != NULL) {
 660                 int token;
 661
 662                 if (!*p)
 663                         continue;
 664                 /*
 665                  * Initialize args struct so we know whether arg was
 666                  * found; some options take optional arguments.
 667                  */
 668                 args[0].to = args[0].from = NULL;
 669                 token = match_token(p, f2fs_tokens, args);
 670
 671                 switch (token) {
 672                 case Opt_gc_background:
 673                         name = match_strdup(&args[0]);
 674
 675                         if (!name)
 676                                 return -ENOMEM;
 677                         if (!strcmp(name, "on")) {
 678                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 679                         } else if (!strcmp(name, "off")) {
 680                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 681                         } else if (!strcmp(name, "sync")) {
 682                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 683                         } else {
 684                                 kfree(name);
 685                                 return -EINVAL;
 686                         }
 687                         kfree(name);
 688                         break;
 689                 case Opt_disable_roll_forward:
 690                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 691                         break;
 692                 case Opt_norecovery:
 693                         /* this option mounts f2fs with ro */
 694                         set_opt(sbi, NORECOVERY);
 695                         if (!f2fs_readonly(sb))
 696                                 return -EINVAL;
 697                         break;
 698                 case Opt_discard:
 699                         if (!f2fs_hw_support_discard(sbi)) {
 700                                 f2fs_warn(sbi, "device does not support discard");
 701                                 break;
 702                         }
 703                         set_opt(sbi, DISCARD);
 704                         break;
 705                 case Opt_nodiscard:
 706                         if (f2fs_hw_should_discard(sbi)) {
 707                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 708                                 return -EINVAL;
 709                         }
 710                         clear_opt(sbi, DISCARD);
 711                         break;
 712                 case Opt_noheap:
 713                         set_opt(sbi, NOHEAP);
 714                         break;
 715                 case Opt_heap:
 716                         clear_opt(sbi, NOHEAP);
 717                         break;
 718 #ifdef CONFIG_F2FS_FS_XATTR
 719                 case Opt_user_xattr:
 720                         set_opt(sbi, XATTR_USER);
 721                         break;
 722                 case Opt_nouser_xattr:
 723                         clear_opt(sbi, XATTR_USER);
 724                         break;
 725                 case Opt_inline_xattr:
 726                         set_opt(sbi, INLINE_XATTR);
 727                         break;
 728                 case Opt_noinline_xattr:
 729                         clear_opt(sbi, INLINE_XATTR);
 730                         break;
 731                 case Opt_inline_xattr_size:
 732                         if (args->from && match_int(args, &arg))
 733                                 return -EINVAL;
 734                         set_opt(sbi, INLINE_XATTR_SIZE);
 735                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 736                         break;
 737 #else
 738                 case Opt_user_xattr:
 739                         f2fs_info(sbi, "user_xattr options not supported");
 740                         break;
 741                 case Opt_nouser_xattr:
 742                         f2fs_info(sbi, "nouser_xattr options not supported");
 743                         break;
 744                 case Opt_inline_xattr:
 745                         f2fs_info(sbi, "inline_xattr options not supported");
 746                         break;
 747                 case Opt_noinline_xattr:
 748                         f2fs_info(sbi, "noinline_xattr options not supported");
 749                         break;
 750 #endif
 751 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 752                 case Opt_acl:
 753                         set_opt(sbi, POSIX_ACL);
 754                         break;
 755                 case Opt_noacl:
 756                         clear_opt(sbi, POSIX_ACL);
 757                         break;
 758 #else
 759                 case Opt_acl:
 760                         f2fs_info(sbi, "acl options not supported");
 761                         break;
 762                 case Opt_noacl:
 763                         f2fs_info(sbi, "noacl options not supported");
 764                         break;
 765 #endif
 766                 case Opt_active_logs:
 767                         if (args->from && match_int(args, &arg))
 768                                 return -EINVAL;
 769                         if (arg != 2 && arg != 4 &&
 770                                 arg != NR_CURSEG_PERSIST_TYPE)
 771                                 return -EINVAL;
 772                         F2FS_OPTION(sbi).active_logs = arg;
 773                         break;
 774                 case Opt_disable_ext_identify:
 775                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 776                         break;
 777                 case Opt_inline_data:
 778                         set_opt(sbi, INLINE_DATA);
 779                         break;
 780                 case Opt_inline_dentry:
 781                         set_opt(sbi, INLINE_DENTRY);
 782                         break;
 783                 case Opt_noinline_dentry:
 784                         clear_opt(sbi, INLINE_DENTRY);
 785                         break;
 786                 case Opt_flush_merge:
 787                         set_opt(sbi, FLUSH_MERGE);
 788                         break;
 789                 case Opt_noflush_merge:
 790                         clear_opt(sbi, FLUSH_MERGE);
 791                         break;
 792                 case Opt_nobarrier:
 793                         set_opt(sbi, NOBARRIER);
 794                         break;
 795                 case Opt_fastboot:
 796                         set_opt(sbi, FASTBOOT);
 797                         break;
 798                 case Opt_extent_cache:
 799                         set_opt(sbi, EXTENT_CACHE);
 800                         break;
 801                 case Opt_noextent_cache:
 802                         clear_opt(sbi, EXTENT_CACHE);
 803                         break;
 804                 case Opt_noinline_data:
 805                         clear_opt(sbi, INLINE_DATA);
 806                         break;
 807                 case Opt_data_flush:
 808                         set_opt(sbi, DATA_FLUSH);
 809                         break;
 810                 case Opt_reserve_root:
 811                         if (args->from && match_int(args, &arg))
 812                                 return -EINVAL;
 813                         if (test_opt(sbi, RESERVE_ROOT)) {
 814                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 815                                           F2FS_OPTION(sbi).root_reserved_blocks);
 816                         } else {
 817                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 818                                 set_opt(sbi, RESERVE_ROOT);
 819                         }
 820                         break;
 821                 case Opt_resuid:
 822                         if (args->from && match_int(args, &arg))
 823                                 return -EINVAL;
 824                         uid = make_kuid(current_user_ns(), arg);
 825                         if (!uid_valid(uid)) {
 826                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 827                                 return -EINVAL;
 828                         }
 829                         F2FS_OPTION(sbi).s_resuid = uid;
 830                         break;
 831                 case Opt_resgid:
 832                         if (args->from && match_int(args, &arg))
 833                                 return -EINVAL;
 834                         gid = make_kgid(current_user_ns(), arg);
 835                         if (!gid_valid(gid)) {
 836                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 837                                 return -EINVAL;
 838                         }
 839                         F2FS_OPTION(sbi).s_resgid = gid;
 840                         break;
 841                 case Opt_mode:
 842                         name = match_strdup(&args[0]);
 843
 844                         if (!name)
 845                                 return -ENOMEM;
 846                         if (!strcmp(name, "adaptive")) {
 847                                 if (f2fs_sb_has_blkzoned(sbi)) {
 848                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 849                                         kfree(name);
 850                                         return -EINVAL;
 851                                 }
 852                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 853                         } else if (!strcmp(name, "lfs")) {
 854                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 855                         } else if (!strcmp(name, "fragment:segment")) {
 856                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 857                         } else if (!strcmp(name, "fragment:block")) {
 858                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 859                         } else {
 860                                 kfree(name);
 861                                 return -EINVAL;
 862                         }
 863                         kfree(name);
 864                         break;
 865                 case Opt_io_size_bits:
 866                         if (args->from && match_int(args, &arg))
 867                                 return -EINVAL;
 868                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 869                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 870                                           1 << arg, BIO_MAX_VECS);
 871                                 return -EINVAL;
 872                         }
 873                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 874                         break;
 875 #ifdef CONFIG_F2FS_FAULT_INJECTION
 876                 case Opt_fault_injection:
 877                         if (args->from && match_int(args, &arg))
 878                                 return -EINVAL;
 879                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 880                         set_opt(sbi, FAULT_INJECTION);
 881                         break;
 882
 883                 case Opt_fault_type:
 884                         if (args->from && match_int(args, &arg))
 885                                 return -EINVAL;
 886                         f2fs_build_fault_attr(sbi, 0, arg);
 887                         set_opt(sbi, FAULT_INJECTION);
 888                         break;
 889 #else
 890                 case Opt_fault_injection:
 891                         f2fs_info(sbi, "fault_injection options not supported");
 892                         break;
 893
 894                 case Opt_fault_type:
 895                         f2fs_info(sbi, "fault_type options not supported");
 896                         break;
 897 #endif
 898                 case Opt_lazytime:
 899                         sb->s_flags |= SB_LAZYTIME;
 900                         break;
 901                 case Opt_nolazytime:
 902                         sb->s_flags &= ~SB_LAZYTIME;
 903                         break;
 904 #ifdef CONFIG_QUOTA
 905                 case Opt_quota:
 906                 case Opt_usrquota:
 907                         set_opt(sbi, USRQUOTA);
 908                         break;
 909                 case Opt_grpquota:
 910                         set_opt(sbi, GRPQUOTA);
 911                         break;
 912                 case Opt_prjquota:
 913                         set_opt(sbi, PRJQUOTA);
 914                         break;
 915                 case Opt_usrjquota:
 916                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 917                         if (ret)
 918                                 return ret;
 919                         break;
 920                 case Opt_grpjquota:
 921                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 922                         if (ret)
 923                                 return ret;
 924                         break;
 925                 case Opt_prjjquota:
 926                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 927                         if (ret)
 928                                 return ret;
 929                         break;
 930                 case Opt_offusrjquota:
 931                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 932                         if (ret)
 933                                 return ret;
 934                         break;
 935                 case Opt_offgrpjquota:
 936                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 937                         if (ret)
 938                                 return ret;
 939                         break;
 940                 case Opt_offprjjquota:
 941                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 942                         if (ret)
 943                                 return ret;
 944                         break;
 945                 case Opt_jqfmt_vfsold:
 946                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 947                         break;
 948                 case Opt_jqfmt_vfsv0:
 949                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 950                         break;
 951                 case Opt_jqfmt_vfsv1:
 952                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 953                         break;
 954                 case Opt_noquota:
 955                         clear_opt(sbi, QUOTA);
 956                         clear_opt(sbi, USRQUOTA);
 957                         clear_opt(sbi, GRPQUOTA);
 958                         clear_opt(sbi, PRJQUOTA);
 959                         break;
 960 #else
 961                 case Opt_quota:
 962                 case Opt_usrquota:
 963                 case Opt_grpquota:
 964                 case Opt_prjquota:
 965                 case Opt_usrjquota:
 966                 case Opt_grpjquota:
 967                 case Opt_prjjquota:
 968                 case Opt_offusrjquota:
 969                 case Opt_offgrpjquota:
 970                 case Opt_offprjjquota:
 971                 case Opt_jqfmt_vfsold:
 972                 case Opt_jqfmt_vfsv0:
 973                 case Opt_jqfmt_vfsv1:
 974                 case Opt_noquota:
 975                         f2fs_info(sbi, "quota operations not supported");
 976                         break;
 977 #endif
 978                 case Opt_whint:
 979                         name = match_strdup(&args[0]);
 980                         if (!name)
 981                                 return -ENOMEM;
 982                         if (!strcmp(name, "user-based")) {
 983                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 984                         } else if (!strcmp(name, "off")) {
 985                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 986                         } else if (!strcmp(name, "fs-based")) {
 987                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 988                         } else {
 989                                 kfree(name);
 990                                 return -EINVAL;
 991                         }
 992                         kfree(name);
 993                         break;
 994                 case Opt_alloc:
 995                         name = match_strdup(&args[0]);
 996                         if (!name)
 997                                 return -ENOMEM;
 998
 999                         if (!strcmp(name, "default")) {
1000                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1001                         } else if (!strcmp(name, "reuse")) {
1002                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1003                         } else {
1004                                 kfree(name);
1005                                 return -EINVAL;
1006                         }
1007                         kfree(name);
1008                         break;
1009                 case Opt_fsync:
1010                         name = match_strdup(&args[0]);
1011                         if (!name)
1012                                 return -ENOMEM;
1013                         if (!strcmp(name, "posix")) {
1014                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1015                         } else if (!strcmp(name, "strict")) {
1016                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1017                         } else if (!strcmp(name, "nobarrier")) {
1018                                 F2FS_OPTION(sbi).fsync_mode =
1019                                                         FSYNC_MODE_NOBARRIER;
1020                         } else {
1021                                 kfree(name);
1022                                 return -EINVAL;
1023                         }
1024                         kfree(name);
1025                         break;
1026                 case Opt_test_dummy_encryption:
1027                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1028                                                              is_remount);
1029                         if (ret)
1030                                 return ret;
1031                         break;
1032                 case Opt_inlinecrypt:
1033 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1034                         sb->s_flags |= SB_INLINECRYPT;
1035 #else
1036                         f2fs_info(sbi, "inline encryption not supported");
1037 #endif
1038                         break;
1039                 case Opt_checkpoint_disable_cap_perc:
1040                         if (args->from && match_int(args, &arg))
1041                                 return -EINVAL;
1042                         if (arg < 0 || arg > 100)
1043                                 return -EINVAL;
1044                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1045                         set_opt(sbi, DISABLE_CHECKPOINT);
1046                         break;
1047                 case Opt_checkpoint_disable_cap:
1048                         if (args->from && match_int(args, &arg))
1049                                 return -EINVAL;
1050                         F2FS_OPTION(sbi).unusable_cap = arg;
1051                         set_opt(sbi, DISABLE_CHECKPOINT);
1052                         break;
1053                 case Opt_checkpoint_disable:
1054                         set_opt(sbi, DISABLE_CHECKPOINT);
1055                         break;
1056                 case Opt_checkpoint_enable:
1057                         clear_opt(sbi, DISABLE_CHECKPOINT);
1058                         break;
1059                 case Opt_checkpoint_merge:
1060                         set_opt(sbi, MERGE_CHECKPOINT);
1061                         break;
1062                 case Opt_nocheckpoint_merge:
1063                         clear_opt(sbi, MERGE_CHECKPOINT);
1064                         break;
1065 #ifdef CONFIG_F2FS_FS_COMPRESSION
1066                 case Opt_compress_algorithm:
1067                         if (!f2fs_sb_has_compression(sbi)) {
1068                                 f2fs_info(sbi, "Image doesn't support compression");
1069                                 break;
1070                         }
1071                         name = match_strdup(&args[0]);
1072                         if (!name)
1073                                 return -ENOMEM;
1074                         if (!strcmp(name, "lzo")) {
1075 #ifdef CONFIG_F2FS_FS_LZO
1076                                 F2FS_OPTION(sbi).compress_level = 0;
1077                                 F2FS_OPTION(sbi).compress_algorithm =
1078                                                                 COMPRESS_LZO;
1079 #else
1080                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1081 #endif
1082                         } else if (!strncmp(name, "lz4", 3)) {
1083 #ifdef CONFIG_F2FS_FS_LZ4
1084                                 ret = f2fs_set_lz4hc_level(sbi, name);
1085                                 if (ret) {
1086                                         kfree(name);
1087                                         return -EINVAL;
1088                                 }
1089                                 F2FS_OPTION(sbi).compress_algorithm =
1090                                                                 COMPRESS_LZ4;
1091 #else
1092                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1093 #endif
1094                         } else if (!strncmp(name, "zstd", 4)) {
1095 #ifdef CONFIG_F2FS_FS_ZSTD
1096                                 ret = f2fs_set_zstd_level(sbi, name);
1097                                 if (ret) {
1098                                         kfree(name);
1099                                         return -EINVAL;
1100                                 }
1101                                 F2FS_OPTION(sbi).compress_algorithm =
1102                                                                 COMPRESS_ZSTD;
1103 #else
1104                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1105 #endif
1106                         } else if (!strcmp(name, "lzo-rle")) {
1107 #ifdef CONFIG_F2FS_FS_LZORLE
1108                                 F2FS_OPTION(sbi).compress_level = 0;
1109                                 F2FS_OPTION(sbi).compress_algorithm =
1110                                                                 COMPRESS_LZORLE;
1111 #else
1112                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1113 #endif
1114                         } else {
1115                                 kfree(name);
1116                                 return -EINVAL;
1117                         }
1118                         kfree(name);
1119                         break;
1120                 case Opt_compress_log_size:
1121                         if (!f2fs_sb_has_compression(sbi)) {
1122                                 f2fs_info(sbi, "Image doesn't support compression");
1123                                 break;
1124                         }
1125                         if (args->from && match_int(args, &arg))
1126                                 return -EINVAL;
1127                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1128                                 arg > MAX_COMPRESS_LOG_SIZE) {
1129                                 f2fs_err(sbi,
1130                                         "Compress cluster log size is out of range");
1131                                 return -EINVAL;
1132                         }
1133                         F2FS_OPTION(sbi).compress_log_size = arg;
1134                         break;
1135                 case Opt_compress_extension:
1136                         if (!f2fs_sb_has_compression(sbi)) {
1137                                 f2fs_info(sbi, "Image doesn't support compression");
1138                                 break;
1139                         }
1140                         name = match_strdup(&args[0]);
1141                         if (!name)
1142                                 return -ENOMEM;
1143
1144                         ext = F2FS_OPTION(sbi).extensions;
1145                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1146
1147                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1148                                 ext_cnt >= COMPRESS_EXT_NUM) {
1149                                 f2fs_err(sbi,
1150                                         "invalid extension length/number");
1151                                 kfree(name);
1152                                 return -EINVAL;
1153                         }
1154
1155                         strcpy(ext[ext_cnt], name);
1156                         F2FS_OPTION(sbi).compress_ext_cnt++;
1157                         kfree(name);
1158                         break;
1159                 case Opt_nocompress_extension:
1160                         if (!f2fs_sb_has_compression(sbi)) {
1161                                 f2fs_info(sbi, "Image doesn't support compression");
1162                                 break;
1163                         }
1164                         name = match_strdup(&args[0]);
1165                         if (!name)
1166                                 return -ENOMEM;
1167
1168                         noext = F2FS_OPTION(sbi).noextensions;
1169                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1170
1171                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1172                                 noext_cnt >= COMPRESS_EXT_NUM) {
1173                                 f2fs_err(sbi,
1174                                         "invalid extension length/number");
1175                                 kfree(name);
1176                                 return -EINVAL;
1177                         }
1178
1179                         strcpy(noext[noext_cnt], name);
1180                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1181                         kfree(name);
1182                         break;
1183                 case Opt_compress_chksum:
1184                         F2FS_OPTION(sbi).compress_chksum = true;
1185                         break;
1186                 case Opt_compress_mode:
1187                         name = match_strdup(&args[0]);
1188                         if (!name)
1189                                 return -ENOMEM;
1190                         if (!strcmp(name, "fs")) {
1191                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1192                         } else if (!strcmp(name, "user")) {
1193                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1194                         } else {
1195                                 kfree(name);
1196                                 return -EINVAL;
1197                         }
1198                         kfree(name);
1199                         break;
1200                 case Opt_compress_cache:
1201                         set_opt(sbi, COMPRESS_CACHE);
1202                         break;
1203 #else
1204                 case Opt_compress_algorithm:
1205                 case Opt_compress_log_size:
1206                 case Opt_compress_extension:
1207                 case Opt_nocompress_extension:
1208                 case Opt_compress_chksum:
1209                 case Opt_compress_mode:
1210                 case Opt_compress_cache:
1211                         f2fs_info(sbi, "compression options not supported");
1212                         break;
1213 #endif
1214                 case Opt_atgc:
1215                         set_opt(sbi, ATGC);
1216                         break;
1217                 case Opt_gc_merge:
1218                         set_opt(sbi, GC_MERGE);
1219                         break;
1220                 case Opt_nogc_merge:
1221                         clear_opt(sbi, GC_MERGE);
1222                         break;
1223                 case Opt_discard_unit:
1224                         name = match_strdup(&args[0]);
1225                         if (!name)
1226                                 return -ENOMEM;
1227                         if (!strcmp(name, "block")) {
1228                                 F2FS_OPTION(sbi).discard_unit =
1229                                                 DISCARD_UNIT_BLOCK;
1230                         } else if (!strcmp(name, "segment")) {
1231                                 F2FS_OPTION(sbi).discard_unit =
1232                                                 DISCARD_UNIT_SEGMENT;
1233                         } else if (!strcmp(name, "section")) {
1234                                 F2FS_OPTION(sbi).discard_unit =
1235                                                 DISCARD_UNIT_SECTION;
1236                         } else {
1237                                 kfree(name);
1238                                 return -EINVAL;
1239                         }
1240                         kfree(name);
1241                         break;
1242                 default:
1243                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1244                                  p);
1245                         return -EINVAL;
1246                 }
1247         }
1248 default_check:
1249 #ifdef CONFIG_QUOTA
1250         if (f2fs_check_quota_options(sbi))
1251                 return -EINVAL;
1252 #else
1253         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1254                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1255                 return -EINVAL;
1256         }
1257         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1258                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1259                 return -EINVAL;
1260         }
1261 #endif
1262 #if !IS_ENABLED(CONFIG_UNICODE)
1263         if (f2fs_sb_has_casefold(sbi)) {
1264                 f2fs_err(sbi,
1265                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1266                 return -EINVAL;
1267         }
1268 #endif
1269         /*
1270          * The BLKZONED feature indicates that the drive was formatted with
1271          * zone alignment optimization. This is optional for host-aware
1272          * devices, but mandatory for host-managed zoned block devices.
1273          */
1274 #ifndef CONFIG_BLK_DEV_ZONED
1275         if (f2fs_sb_has_blkzoned(sbi)) {
1276                 f2fs_err(sbi, "Zoned block device support is not enabled");
1277                 return -EINVAL;
1278         }
1279 #endif
1280         if (f2fs_sb_has_blkzoned(sbi)) {
1281                 if (F2FS_OPTION(sbi).discard_unit !=
1282                                                 DISCARD_UNIT_SECTION) {
1283                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1284                         F2FS_OPTION(sbi).discard_unit =
1285                                         DISCARD_UNIT_SECTION;
1286                 }
1287         }
1288
1289 #ifdef CONFIG_F2FS_FS_COMPRESSION
1290         if (f2fs_test_compress_extension(sbi)) {
1291                 f2fs_err(sbi, "invalid compress or nocompress extension");
1292                 return -EINVAL;
1293         }
1294 #endif
1295
1296         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1297                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1298                          F2FS_IO_SIZE_KB(sbi));
1299                 return -EINVAL;
1300         }
1301
1302         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1303                 int min_size, max_size;
1304
1305                 if (!f2fs_sb_has_extra_attr(sbi) ||
1306                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1307                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1308                         return -EINVAL;
1309                 }
1310                 if (!test_opt(sbi, INLINE_XATTR)) {
1311                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1312                         return -EINVAL;
1313                 }
1314
1315                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1316                 max_size = MAX_INLINE_XATTR_SIZE;
1317
1318                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1319                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1320                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1321                                  min_size, max_size);
1322                         return -EINVAL;
1323                 }
1324         }
1325
1326         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1327                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1328                 return -EINVAL;
1329         }
1330
1331         /* Not pass down write hints if the number of active logs is lesser
1332          * than NR_CURSEG_PERSIST_TYPE.
1333          */
1334         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_PERSIST_TYPE)
1335                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1336
1337         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1338                 f2fs_err(sbi, "Allow to mount readonly mode only");
1339                 return -EROFS;
1340         }
1341         return 0;
1342 }
1343
1344 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1345 {
1346         struct f2fs_inode_info *fi;
1347
1348         fi = f2fs_kmem_cache_alloc(f2fs_inode_cachep,
1349                                 GFP_F2FS_ZERO, false, F2FS_SB(sb));
1350         if (!fi)
1351                 return NULL;
1352
1353         init_once((void *) fi);
1354
1355         /* Initialize f2fs-specific inode info */
1356         atomic_set(&fi->dirty_pages, 0);
1357         atomic_set(&fi->i_compr_blocks, 0);
1358         init_rwsem(&fi->i_sem);
1359         spin_lock_init(&fi->i_size_lock);
1360         INIT_LIST_HEAD(&fi->dirty_list);
1361         INIT_LIST_HEAD(&fi->gdirty_list);
1362         INIT_LIST_HEAD(&fi->inmem_ilist);
1363         INIT_LIST_HEAD(&fi->inmem_pages);
1364         mutex_init(&fi->inmem_lock);
1365         init_rwsem(&fi->i_gc_rwsem[READ]);
1366         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1367         init_rwsem(&fi->i_xattr_sem);
1368
1369         /* Will be used by directory only */
1370         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1371
1372         return &fi->vfs_inode;
1373 }
1374
1375 static int f2fs_drop_inode(struct inode *inode)
1376 {
1377         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1378         int ret;
1379
1380         /*
1381          * during filesystem shutdown, if checkpoint is disabled,
1382          * drop useless meta/node dirty pages.
1383          */
1384         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1385                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1386                         inode->i_ino == F2FS_META_INO(sbi)) {
1387                         trace_f2fs_drop_inode(inode, 1);
1388                         return 1;
1389                 }
1390         }
1391
1392         /*
1393          * This is to avoid a deadlock condition like below.
1394          * writeback_single_inode(inode)
1395          *  - f2fs_write_data_page
1396          *    - f2fs_gc -> iput -> evict
1397          *       - inode_wait_for_writeback(inode)
1398          */
1399         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1400                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1401                         /* to avoid evict_inode call simultaneously */
1402                         atomic_inc(&inode->i_count);
1403                         spin_unlock(&inode->i_lock);
1404
1405                         /* some remained atomic pages should discarded */
1406                         if (f2fs_is_atomic_file(inode))
1407                                 f2fs_drop_inmem_pages(inode);
1408
1409                         /* should remain fi->extent_tree for writepage */
1410                         f2fs_destroy_extent_node(inode);
1411
1412                         sb_start_intwrite(inode->i_sb);
1413                         f2fs_i_size_write(inode, 0);
1414
1415                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1416                                         inode, NULL, 0, DATA);
1417                         truncate_inode_pages_final(inode->i_mapping);
1418
1419                         if (F2FS_HAS_BLOCKS(inode))
1420                                 f2fs_truncate(inode);
1421
1422                         sb_end_intwrite(inode->i_sb);
1423
1424                         spin_lock(&inode->i_lock);
1425                         atomic_dec(&inode->i_count);
1426                 }
1427                 trace_f2fs_drop_inode(inode, 0);
1428                 return 0;
1429         }
1430         ret = generic_drop_inode(inode);
1431         if (!ret)
1432                 ret = fscrypt_drop_inode(inode);
1433         trace_f2fs_drop_inode(inode, ret);
1434         return ret;
1435 }
1436
1437 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1438 {
1439         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1440         int ret = 0;
1441
1442         spin_lock(&sbi->inode_lock[DIRTY_META]);
1443         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1444                 ret = 1;
1445         } else {
1446                 set_inode_flag(inode, FI_DIRTY_INODE);
1447                 stat_inc_dirty_inode(sbi, DIRTY_META);
1448         }
1449         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1450                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1451                                 &sbi->inode_list[DIRTY_META]);
1452                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1453         }
1454         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1455         return ret;
1456 }
1457
1458 void f2fs_inode_synced(struct inode *inode)
1459 {
1460         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1461
1462         spin_lock(&sbi->inode_lock[DIRTY_META]);
1463         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1464                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1465                 return;
1466         }
1467         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1468                 list_del_init(&F2FS_I(inode)->gdirty_list);
1469                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1470         }
1471         clear_inode_flag(inode, FI_DIRTY_INODE);
1472         clear_inode_flag(inode, FI_AUTO_RECOVER);
1473         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1474         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1475 }
1476
1477 /*
1478  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1479  *
1480  * We should call set_dirty_inode to write the dirty inode through write_inode.
1481  */
1482 static void f2fs_dirty_inode(struct inode *inode, int flags)
1483 {
1484         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1485
1486         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1487                         inode->i_ino == F2FS_META_INO(sbi))
1488                 return;
1489
1490         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1491                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1492
1493         f2fs_inode_dirtied(inode, false);
1494 }
1495
1496 static void f2fs_free_inode(struct inode *inode)
1497 {
1498         fscrypt_free_inode(inode);
1499         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1500 }
1501
1502 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1503 {
1504         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1505         percpu_counter_destroy(&sbi->total_valid_inode_count);
1506 }
1507
1508 static void destroy_device_list(struct f2fs_sb_info *sbi)
1509 {
1510         int i;
1511
1512         for (i = 0; i < sbi->s_ndevs; i++) {
1513                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1514 #ifdef CONFIG_BLK_DEV_ZONED
1515                 kvfree(FDEV(i).blkz_seq);
1516                 kfree(FDEV(i).zone_capacity_blocks);
1517 #endif
1518         }
1519         kvfree(sbi->devs);
1520 }
1521
1522 static void f2fs_put_super(struct super_block *sb)
1523 {
1524         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1525         int i;
1526         bool dropped;
1527
1528         /* unregister procfs/sysfs entries in advance to avoid race case */
1529         f2fs_unregister_sysfs(sbi);
1530
1531         f2fs_quota_off_umount(sb);
1532
1533         /* prevent remaining shrinker jobs */
1534         mutex_lock(&sbi->umount_mutex);
1535
1536         /*
1537          * flush all issued checkpoints and stop checkpoint issue thread.
1538          * after then, all checkpoints should be done by each process context.
1539          */
1540         f2fs_stop_ckpt_thread(sbi);
1541
1542         /*
1543          * We don't need to do checkpoint when superblock is clean.
1544          * But, the previous checkpoint was not done by umount, it needs to do
1545          * clean checkpoint again.
1546          */
1547         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1548                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1549                 struct cp_control cpc = {
1550                         .reason = CP_UMOUNT,
1551                 };
1552                 f2fs_write_checkpoint(sbi, &cpc);
1553         }
1554
1555         /* be sure to wait for any on-going discard commands */
1556         dropped = f2fs_issue_discard_timeout(sbi);
1557
1558         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1559                                         !sbi->discard_blks && !dropped) {
1560                 struct cp_control cpc = {
1561                         .reason = CP_UMOUNT | CP_TRIMMED,
1562                 };
1563                 f2fs_write_checkpoint(sbi, &cpc);
1564         }
1565
1566         /*
1567          * normally superblock is clean, so we need to release this.
1568          * In addition, EIO will skip do checkpoint, we need this as well.
1569          */
1570         f2fs_release_ino_entry(sbi, true);
1571
1572         f2fs_leave_shrinker(sbi);
1573         mutex_unlock(&sbi->umount_mutex);
1574
1575         /* our cp_error case, we can wait for any writeback page */
1576         f2fs_flush_merged_writes(sbi);
1577
1578         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1579
1580         f2fs_bug_on(sbi, sbi->fsync_node_num);
1581
1582         f2fs_destroy_compress_inode(sbi);
1583
1584         iput(sbi->node_inode);
1585         sbi->node_inode = NULL;
1586
1587         iput(sbi->meta_inode);
1588         sbi->meta_inode = NULL;
1589
1590         /*
1591          * iput() can update stat information, if f2fs_write_checkpoint()
1592          * above failed with error.
1593          */
1594         f2fs_destroy_stats(sbi);
1595
1596         /* destroy f2fs internal modules */
1597         f2fs_destroy_node_manager(sbi);
1598         f2fs_destroy_segment_manager(sbi);
1599
1600         f2fs_destroy_post_read_wq(sbi);
1601
1602         kvfree(sbi->ckpt);
1603
1604         sb->s_fs_info = NULL;
1605         if (sbi->s_chksum_driver)
1606                 crypto_free_shash(sbi->s_chksum_driver);
1607         kfree(sbi->raw_super);
1608
1609         destroy_device_list(sbi);
1610         f2fs_destroy_page_array_cache(sbi);
1611         f2fs_destroy_xattr_caches(sbi);
1612         mempool_destroy(sbi->write_io_dummy);
1613 #ifdef CONFIG_QUOTA
1614         for (i = 0; i < MAXQUOTAS; i++)
1615                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1616 #endif
1617         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1618         destroy_percpu_info(sbi);
1619         f2fs_destroy_iostat(sbi);
1620         for (i = 0; i < NR_PAGE_TYPE; i++)
1621                 kvfree(sbi->write_io[i]);
1622 #if IS_ENABLED(CONFIG_UNICODE)
1623         utf8_unload(sb->s_encoding);
1624 #endif
1625         kfree(sbi);
1626 }
1627
1628 int f2fs_sync_fs(struct super_block *sb, int sync)
1629 {
1630         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1631         int err = 0;
1632
1633         if (unlikely(f2fs_cp_error(sbi)))
1634                 return 0;
1635         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1636                 return 0;
1637
1638         trace_f2fs_sync_fs(sb, sync);
1639
1640         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1641                 return -EAGAIN;
1642
1643         if (sync)
1644                 err = f2fs_issue_checkpoint(sbi);
1645
1646         return err;
1647 }
1648
1649 static int f2fs_freeze(struct super_block *sb)
1650 {
1651         if (f2fs_readonly(sb))
1652                 return 0;
1653
1654         /* IO error happened before */
1655         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1656                 return -EIO;
1657
1658         /* must be clean, since sync_filesystem() was already called */
1659         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1660                 return -EINVAL;
1661
1662         /* ensure no checkpoint required */
1663         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1664                 return -EINVAL;
1665         return 0;
1666 }
1667
1668 static int f2fs_unfreeze(struct super_block *sb)
1669 {
1670         return 0;
1671 }
1672
1673 #ifdef CONFIG_QUOTA
1674 static int f2fs_statfs_project(struct super_block *sb,
1675                                 kprojid_t projid, struct kstatfs *buf)
1676 {
1677         struct kqid qid;
1678         struct dquot *dquot;
1679         u64 limit;
1680         u64 curblock;
1681
1682         qid = make_kqid_projid(projid);
1683         dquot = dqget(sb, qid);
1684         if (IS_ERR(dquot))
1685                 return PTR_ERR(dquot);
1686         spin_lock(&dquot->dq_dqb_lock);
1687
1688         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1689                                         dquot->dq_dqb.dqb_bhardlimit);
1690         if (limit)
1691                 limit >>= sb->s_blocksize_bits;
1692
1693         if (limit && buf->f_blocks > limit) {
1694                 curblock = (dquot->dq_dqb.dqb_curspace +
1695                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1696                 buf->f_blocks = limit;
1697                 buf->f_bfree = buf->f_bavail =
1698                         (buf->f_blocks > curblock) ?
1699                          (buf->f_blocks - curblock) : 0;
1700         }
1701
1702         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1703                                         dquot->dq_dqb.dqb_ihardlimit);
1704
1705         if (limit && buf->f_files > limit) {
1706                 buf->f_files = limit;
1707                 buf->f_ffree =
1708                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1709                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1710         }
1711
1712         spin_unlock(&dquot->dq_dqb_lock);
1713         dqput(dquot);
1714         return 0;
1715 }
1716 #endif
1717
1718 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1719 {
1720         struct super_block *sb = dentry->d_sb;
1721         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1722         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1723         block_t total_count, user_block_count, start_count;
1724         u64 avail_node_count;
1725
1726         total_count = le64_to_cpu(sbi->raw_super->block_count);
1727         user_block_count = sbi->user_block_count;
1728         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1729         buf->f_type = F2FS_SUPER_MAGIC;
1730         buf->f_bsize = sbi->blocksize;
1731
1732         buf->f_blocks = total_count - start_count;
1733         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1734                                                 sbi->current_reserved_blocks;
1735
1736         spin_lock(&sbi->stat_lock);
1737         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1738                 buf->f_bfree = 0;
1739         else
1740                 buf->f_bfree -= sbi->unusable_block_count;
1741         spin_unlock(&sbi->stat_lock);
1742
1743         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1744                 buf->f_bavail = buf->f_bfree -
1745                                 F2FS_OPTION(sbi).root_reserved_blocks;
1746         else
1747                 buf->f_bavail = 0;
1748
1749         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1750
1751         if (avail_node_count > user_block_count) {
1752                 buf->f_files = user_block_count;
1753                 buf->f_ffree = buf->f_bavail;
1754         } else {
1755                 buf->f_files = avail_node_count;
1756                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1757                                         buf->f_bavail);
1758         }
1759
1760         buf->f_namelen = F2FS_NAME_LEN;
1761         buf->f_fsid    = u64_to_fsid(id);
1762
1763 #ifdef CONFIG_QUOTA
1764         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1765                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1766                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1767         }
1768 #endif
1769         return 0;
1770 }
1771
1772 static inline void f2fs_show_quota_options(struct seq_file *seq,
1773                                            struct super_block *sb)
1774 {
1775 #ifdef CONFIG_QUOTA
1776         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1777
1778         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1779                 char *fmtname = "";
1780
1781                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1782                 case QFMT_VFS_OLD:
1783                         fmtname = "vfsold";
1784                         break;
1785                 case QFMT_VFS_V0:
1786                         fmtname = "vfsv0";
1787                         break;
1788                 case QFMT_VFS_V1:
1789                         fmtname = "vfsv1";
1790                         break;
1791                 }
1792                 seq_printf(seq, ",jqfmt=%s", fmtname);
1793         }
1794
1795         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1796                 seq_show_option(seq, "usrjquota",
1797                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1798
1799         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1800                 seq_show_option(seq, "grpjquota",
1801                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1802
1803         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1804                 seq_show_option(seq, "prjjquota",
1805                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1806 #endif
1807 }
1808
1809 #ifdef CONFIG_F2FS_FS_COMPRESSION
1810 static inline void f2fs_show_compress_options(struct seq_file *seq,
1811                                                         struct super_block *sb)
1812 {
1813         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1814         char *algtype = "";
1815         int i;
1816
1817         if (!f2fs_sb_has_compression(sbi))
1818                 return;
1819
1820         switch (F2FS_OPTION(sbi).compress_algorithm) {
1821         case COMPRESS_LZO:
1822                 algtype = "lzo";
1823                 break;
1824         case COMPRESS_LZ4:
1825                 algtype = "lz4";
1826                 break;
1827         case COMPRESS_ZSTD:
1828                 algtype = "zstd";
1829                 break;
1830         case COMPRESS_LZORLE:
1831                 algtype = "lzo-rle";
1832                 break;
1833         }
1834         seq_printf(seq, ",compress_algorithm=%s", algtype);
1835
1836         if (F2FS_OPTION(sbi).compress_level)
1837                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1838
1839         seq_printf(seq, ",compress_log_size=%u",
1840                         F2FS_OPTION(sbi).compress_log_size);
1841
1842         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1843                 seq_printf(seq, ",compress_extension=%s",
1844                         F2FS_OPTION(sbi).extensions[i]);
1845         }
1846
1847         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1848                 seq_printf(seq, ",nocompress_extension=%s",
1849                         F2FS_OPTION(sbi).noextensions[i]);
1850         }
1851
1852         if (F2FS_OPTION(sbi).compress_chksum)
1853                 seq_puts(seq, ",compress_chksum");
1854
1855         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1856                 seq_printf(seq, ",compress_mode=%s", "fs");
1857         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1858                 seq_printf(seq, ",compress_mode=%s", "user");
1859
1860         if (test_opt(sbi, COMPRESS_CACHE))
1861                 seq_puts(seq, ",compress_cache");
1862 }
1863 #endif
1864
1865 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1866 {
1867         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1868
1869         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1870                 seq_printf(seq, ",background_gc=%s", "sync");
1871         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1872                 seq_printf(seq, ",background_gc=%s", "on");
1873         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1874                 seq_printf(seq, ",background_gc=%s", "off");
1875
1876         if (test_opt(sbi, GC_MERGE))
1877                 seq_puts(seq, ",gc_merge");
1878
1879         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1880                 seq_puts(seq, ",disable_roll_forward");
1881         if (test_opt(sbi, NORECOVERY))
1882                 seq_puts(seq, ",norecovery");
1883         if (test_opt(sbi, DISCARD))
1884                 seq_puts(seq, ",discard");
1885         else
1886                 seq_puts(seq, ",nodiscard");
1887         if (test_opt(sbi, NOHEAP))
1888                 seq_puts(seq, ",no_heap");
1889         else
1890                 seq_puts(seq, ",heap");
1891 #ifdef CONFIG_F2FS_FS_XATTR
1892         if (test_opt(sbi, XATTR_USER))
1893                 seq_puts(seq, ",user_xattr");
1894         else
1895                 seq_puts(seq, ",nouser_xattr");
1896         if (test_opt(sbi, INLINE_XATTR))
1897                 seq_puts(seq, ",inline_xattr");
1898         else
1899                 seq_puts(seq, ",noinline_xattr");
1900         if (test_opt(sbi, INLINE_XATTR_SIZE))
1901                 seq_printf(seq, ",inline_xattr_size=%u",
1902                                         F2FS_OPTION(sbi).inline_xattr_size);
1903 #endif
1904 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1905         if (test_opt(sbi, POSIX_ACL))
1906                 seq_puts(seq, ",acl");
1907         else
1908                 seq_puts(seq, ",noacl");
1909 #endif
1910         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1911                 seq_puts(seq, ",disable_ext_identify");
1912         if (test_opt(sbi, INLINE_DATA))
1913                 seq_puts(seq, ",inline_data");
1914         else
1915                 seq_puts(seq, ",noinline_data");
1916         if (test_opt(sbi, INLINE_DENTRY))
1917                 seq_puts(seq, ",inline_dentry");
1918         else
1919                 seq_puts(seq, ",noinline_dentry");
1920         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1921                 seq_puts(seq, ",flush_merge");
1922         if (test_opt(sbi, NOBARRIER))
1923                 seq_puts(seq, ",nobarrier");
1924         if (test_opt(sbi, FASTBOOT))
1925                 seq_puts(seq, ",fastboot");
1926         if (test_opt(sbi, EXTENT_CACHE))
1927                 seq_puts(seq, ",extent_cache");
1928         else
1929                 seq_puts(seq, ",noextent_cache");
1930         if (test_opt(sbi, DATA_FLUSH))
1931                 seq_puts(seq, ",data_flush");
1932
1933         seq_puts(seq, ",mode=");
1934         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1935                 seq_puts(seq, "adaptive");
1936         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1937                 seq_puts(seq, "lfs");
1938         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
1939                 seq_puts(seq, "fragment:segment");
1940         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
1941                 seq_puts(seq, "fragment:block");
1942         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1943         if (test_opt(sbi, RESERVE_ROOT))
1944                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1945                                 F2FS_OPTION(sbi).root_reserved_blocks,
1946                                 from_kuid_munged(&init_user_ns,
1947                                         F2FS_OPTION(sbi).s_resuid),
1948                                 from_kgid_munged(&init_user_ns,
1949                                         F2FS_OPTION(sbi).s_resgid));
1950         if (F2FS_IO_SIZE_BITS(sbi))
1951                 seq_printf(seq, ",io_bits=%u",
1952                                 F2FS_OPTION(sbi).write_io_size_bits);
1953 #ifdef CONFIG_F2FS_FAULT_INJECTION
1954         if (test_opt(sbi, FAULT_INJECTION)) {
1955                 seq_printf(seq, ",fault_injection=%u",
1956                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1957                 seq_printf(seq, ",fault_type=%u",
1958                                 F2FS_OPTION(sbi).fault_info.inject_type);
1959         }
1960 #endif
1961 #ifdef CONFIG_QUOTA
1962         if (test_opt(sbi, QUOTA))
1963                 seq_puts(seq, ",quota");
1964         if (test_opt(sbi, USRQUOTA))
1965                 seq_puts(seq, ",usrquota");
1966         if (test_opt(sbi, GRPQUOTA))
1967                 seq_puts(seq, ",grpquota");
1968         if (test_opt(sbi, PRJQUOTA))
1969                 seq_puts(seq, ",prjquota");
1970 #endif
1971         f2fs_show_quota_options(seq, sbi->sb);
1972         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1973                 seq_printf(seq, ",whint_mode=%s", "user-based");
1974         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1975                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1976
1977         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1978
1979         if (sbi->sb->s_flags & SB_INLINECRYPT)
1980                 seq_puts(seq, ",inlinecrypt");
1981
1982         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1983                 seq_printf(seq, ",alloc_mode=%s", "default");
1984         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1985                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1986
1987         if (test_opt(sbi, DISABLE_CHECKPOINT))
1988                 seq_printf(seq, ",checkpoint=disable:%u",
1989                                 F2FS_OPTION(sbi).unusable_cap);
1990         if (test_opt(sbi, MERGE_CHECKPOINT))
1991                 seq_puts(seq, ",checkpoint_merge");
1992         else
1993                 seq_puts(seq, ",nocheckpoint_merge");
1994         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1995                 seq_printf(seq, ",fsync_mode=%s", "posix");
1996         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1997                 seq_printf(seq, ",fsync_mode=%s", "strict");
1998         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1999                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2000
2001 #ifdef CONFIG_F2FS_FS_COMPRESSION
2002         f2fs_show_compress_options(seq, sbi->sb);
2003 #endif
2004
2005         if (test_opt(sbi, ATGC))
2006                 seq_puts(seq, ",atgc");
2007
2008         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2009                 seq_printf(seq, ",discard_unit=%s", "block");
2010         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2011                 seq_printf(seq, ",discard_unit=%s", "segment");
2012         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2013                 seq_printf(seq, ",discard_unit=%s", "section");
2014
2015         return 0;
2016 }
2017
2018 static void default_options(struct f2fs_sb_info *sbi)
2019 {
2020         /* init some FS parameters */
2021         if (f2fs_sb_has_readonly(sbi))
2022                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2023         else
2024                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2025
2026         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2027         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
2028         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2029         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2030         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2031         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2032         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2033         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2034         F2FS_OPTION(sbi).compress_ext_cnt = 0;
2035         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2036         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2037
2038         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2039
2040         set_opt(sbi, INLINE_XATTR);
2041         set_opt(sbi, INLINE_DATA);
2042         set_opt(sbi, INLINE_DENTRY);
2043         set_opt(sbi, EXTENT_CACHE);
2044         set_opt(sbi, NOHEAP);
2045         clear_opt(sbi, DISABLE_CHECKPOINT);
2046         set_opt(sbi, MERGE_CHECKPOINT);
2047         F2FS_OPTION(sbi).unusable_cap = 0;
2048         sbi->sb->s_flags |= SB_LAZYTIME;
2049         set_opt(sbi, FLUSH_MERGE);
2050         if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2051                 set_opt(sbi, DISCARD);
2052         if (f2fs_sb_has_blkzoned(sbi)) {
2053                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2054                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2055         } else {
2056                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2057                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2058         }
2059
2060 #ifdef CONFIG_F2FS_FS_XATTR
2061         set_opt(sbi, XATTR_USER);
2062 #endif
2063 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2064         set_opt(sbi, POSIX_ACL);
2065 #endif
2066
2067         f2fs_build_fault_attr(sbi, 0, 0);
2068 }
2069
2070 #ifdef CONFIG_QUOTA
2071 static int f2fs_enable_quotas(struct super_block *sb);
2072 #endif
2073
2074 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2075 {
2076         unsigned int s_flags = sbi->sb->s_flags;
2077         struct cp_control cpc;
2078         int err = 0;
2079         int ret;
2080         block_t unusable;
2081
2082         if (s_flags & SB_RDONLY) {
2083                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2084                 return -EINVAL;
2085         }
2086         sbi->sb->s_flags |= SB_ACTIVE;
2087
2088         f2fs_update_time(sbi, DISABLE_TIME);
2089
2090         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2091                 down_write(&sbi->gc_lock);
2092                 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
2093                 if (err == -ENODATA) {
2094                         err = 0;
2095                         break;
2096                 }
2097                 if (err && err != -EAGAIN)
2098                         break;
2099         }
2100
2101         ret = sync_filesystem(sbi->sb);
2102         if (ret || err) {
2103                 err = ret ? ret : err;
2104                 goto restore_flag;
2105         }
2106
2107         unusable = f2fs_get_unusable_blocks(sbi);
2108         if (f2fs_disable_cp_again(sbi, unusable)) {
2109                 err = -EAGAIN;
2110                 goto restore_flag;
2111         }
2112
2113         down_write(&sbi->gc_lock);
2114         cpc.reason = CP_PAUSE;
2115         set_sbi_flag(sbi, SBI_CP_DISABLED);
2116         err = f2fs_write_checkpoint(sbi, &cpc);
2117         if (err)
2118                 goto out_unlock;
2119
2120         spin_lock(&sbi->stat_lock);
2121         sbi->unusable_block_count = unusable;
2122         spin_unlock(&sbi->stat_lock);
2123
2124 out_unlock:
2125         up_write(&sbi->gc_lock);
2126 restore_flag:
2127         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2128         return err;
2129 }
2130
2131 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2132 {
2133         int retry = DEFAULT_RETRY_IO_COUNT;
2134
2135         /* we should flush all the data to keep data consistency */
2136         do {
2137                 sync_inodes_sb(sbi->sb);
2138                 cond_resched();
2139                 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
2140         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2141
2142         if (unlikely(retry < 0))
2143                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2144
2145         down_write(&sbi->gc_lock);
2146         f2fs_dirty_to_prefree(sbi);
2147
2148         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2149         set_sbi_flag(sbi, SBI_IS_DIRTY);
2150         up_write(&sbi->gc_lock);
2151
2152         f2fs_sync_fs(sbi->sb, 1);
2153 }
2154
2155 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2156 {
2157         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2158         struct f2fs_mount_info org_mount_opt;
2159         unsigned long old_sb_flags;
2160         int err;
2161         bool need_restart_gc = false, need_stop_gc = false;
2162         bool need_restart_ckpt = false, need_stop_ckpt = false;
2163         bool need_restart_flush = false, need_stop_flush = false;
2164         bool need_restart_discard = false, need_stop_discard = false;
2165         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2166         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2167         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2168         bool no_atgc = !test_opt(sbi, ATGC);
2169         bool no_discard = !test_opt(sbi, DISCARD);
2170         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2171         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2172         struct discard_cmd_control *dcc;
2173 #ifdef CONFIG_QUOTA
2174         int i, j;
2175 #endif
2176
2177         /*
2178          * Save the old mount options in case we
2179          * need to restore them.
2180          */
2181         org_mount_opt = sbi->mount_opt;
2182         old_sb_flags = sb->s_flags;
2183
2184 #ifdef CONFIG_QUOTA
2185         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2186         for (i = 0; i < MAXQUOTAS; i++) {
2187                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2188                         org_mount_opt.s_qf_names[i] =
2189                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2190                                 GFP_KERNEL);
2191                         if (!org_mount_opt.s_qf_names[i]) {
2192                                 for (j = 0; j < i; j++)
2193                                         kfree(org_mount_opt.s_qf_names[j]);
2194                                 return -ENOMEM;
2195                         }
2196                 } else {
2197                         org_mount_opt.s_qf_names[i] = NULL;
2198                 }
2199         }
2200 #endif
2201
2202         /* recover superblocks we couldn't write due to previous RO mount */
2203         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2204                 err = f2fs_commit_super(sbi, false);
2205                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2206                           err);
2207                 if (!err)
2208                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2209         }
2210
2211         default_options(sbi);
2212
2213         /* parse mount options */
2214         err = parse_options(sb, data, true);
2215         if (err)
2216                 goto restore_opts;
2217
2218         /*
2219          * Previous and new state of filesystem is RO,
2220          * so skip checking GC and FLUSH_MERGE conditions.
2221          */
2222         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2223                 goto skip;
2224
2225         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2226                 err = -EROFS;
2227                 goto restore_opts;
2228         }
2229
2230 #ifdef CONFIG_QUOTA
2231         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2232                 err = dquot_suspend(sb, -1);
2233                 if (err < 0)
2234                         goto restore_opts;
2235         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2236                 /* dquot_resume needs RW */
2237                 sb->s_flags &= ~SB_RDONLY;
2238                 if (sb_any_quota_suspended(sb)) {
2239                         dquot_resume(sb, -1);
2240                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2241                         err = f2fs_enable_quotas(sb);
2242                         if (err)
2243                                 goto restore_opts;
2244                 }
2245         }
2246 #endif
2247         /* disallow enable atgc dynamically */
2248         if (no_atgc == !!test_opt(sbi, ATGC)) {
2249                 err = -EINVAL;
2250                 f2fs_warn(sbi, "switch atgc option is not allowed");
2251                 goto restore_opts;
2252         }
2253
2254         /* disallow enable/disable extent_cache dynamically */
2255         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2256                 err = -EINVAL;
2257                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2258                 goto restore_opts;
2259         }
2260
2261         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2262                 err = -EINVAL;
2263                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2264                 goto restore_opts;
2265         }
2266
2267         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2268                 err = -EINVAL;
2269                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2270                 goto restore_opts;
2271         }
2272
2273         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2274                 err = -EINVAL;
2275                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2276                 goto restore_opts;
2277         }
2278
2279         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2280                 err = -EINVAL;
2281                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2282                 goto restore_opts;
2283         }
2284
2285         /*
2286          * We stop the GC thread if FS is mounted as RO
2287          * or if background_gc = off is passed in mount
2288          * option. Also sync the filesystem.
2289          */
2290         if ((*flags & SB_RDONLY) ||
2291                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2292                         !test_opt(sbi, GC_MERGE))) {
2293                 if (sbi->gc_thread) {
2294                         f2fs_stop_gc_thread(sbi);
2295                         need_restart_gc = true;
2296                 }
2297         } else if (!sbi->gc_thread) {
2298                 err = f2fs_start_gc_thread(sbi);
2299                 if (err)
2300                         goto restore_opts;
2301                 need_stop_gc = true;
2302         }
2303
2304         if (*flags & SB_RDONLY ||
2305                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
2306                 sync_inodes_sb(sb);
2307
2308                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2309                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2310                 f2fs_sync_fs(sb, 1);
2311                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2312         }
2313
2314         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2315                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2316                 f2fs_stop_ckpt_thread(sbi);
2317                 need_restart_ckpt = true;
2318         } else {
2319                 err = f2fs_start_ckpt_thread(sbi);
2320                 if (err) {
2321                         f2fs_err(sbi,
2322                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2323                             err);
2324                         goto restore_gc;
2325                 }
2326                 need_stop_ckpt = true;
2327         }
2328
2329         /*
2330          * We stop issue flush thread if FS is mounted as RO
2331          * or if flush_merge is not passed in mount option.
2332          */
2333         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2334                 clear_opt(sbi, FLUSH_MERGE);
2335                 f2fs_destroy_flush_cmd_control(sbi, false);
2336                 need_restart_flush = true;
2337         } else {
2338                 err = f2fs_create_flush_cmd_control(sbi);
2339                 if (err)
2340                         goto restore_ckpt;
2341                 need_stop_flush = true;
2342         }
2343
2344         if (no_discard == !!test_opt(sbi, DISCARD)) {
2345                 if (test_opt(sbi, DISCARD)) {
2346                         err = f2fs_start_discard_thread(sbi);
2347                         if (err)
2348                                 goto restore_flush;
2349                         need_stop_discard = true;
2350                 } else {
2351                         dcc = SM_I(sbi)->dcc_info;
2352                         f2fs_stop_discard_thread(sbi);
2353                         if (atomic_read(&dcc->discard_cmd_cnt))
2354                                 f2fs_issue_discard_timeout(sbi);
2355                         need_restart_discard = true;
2356                 }
2357         }
2358
2359         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2360                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2361                         err = f2fs_disable_checkpoint(sbi);
2362                         if (err)
2363                                 goto restore_discard;
2364                 } else {
2365                         f2fs_enable_checkpoint(sbi);
2366                 }
2367         }
2368
2369 skip:
2370 #ifdef CONFIG_QUOTA
2371         /* Release old quota file names */
2372         for (i = 0; i < MAXQUOTAS; i++)
2373                 kfree(org_mount_opt.s_qf_names[i]);
2374 #endif
2375         /* Update the POSIXACL Flag */
2376         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2377                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2378
2379         limit_reserve_root(sbi);
2380         adjust_unusable_cap_perc(sbi);
2381         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2382         return 0;
2383 restore_discard:
2384         if (need_restart_discard) {
2385                 if (f2fs_start_discard_thread(sbi))
2386                         f2fs_warn(sbi, "discard has been stopped");
2387         } else if (need_stop_discard) {
2388                 f2fs_stop_discard_thread(sbi);
2389         }
2390 restore_flush:
2391         if (need_restart_flush) {
2392                 if (f2fs_create_flush_cmd_control(sbi))
2393                         f2fs_warn(sbi, "background flush thread has stopped");
2394         } else if (need_stop_flush) {
2395                 clear_opt(sbi, FLUSH_MERGE);
2396                 f2fs_destroy_flush_cmd_control(sbi, false);
2397         }
2398 restore_ckpt:
2399         if (need_restart_ckpt) {
2400                 if (f2fs_start_ckpt_thread(sbi))
2401                         f2fs_warn(sbi, "background ckpt thread has stopped");
2402         } else if (need_stop_ckpt) {
2403                 f2fs_stop_ckpt_thread(sbi);
2404         }
2405 restore_gc:
2406         if (need_restart_gc) {
2407                 if (f2fs_start_gc_thread(sbi))
2408                         f2fs_warn(sbi, "background gc thread has stopped");
2409         } else if (need_stop_gc) {
2410                 f2fs_stop_gc_thread(sbi);
2411         }
2412 restore_opts:
2413 #ifdef CONFIG_QUOTA
2414         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2415         for (i = 0; i < MAXQUOTAS; i++) {
2416                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2417                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2418         }
2419 #endif
2420         sbi->mount_opt = org_mount_opt;
2421         sb->s_flags = old_sb_flags;
2422         return err;
2423 }
2424
2425 #ifdef CONFIG_QUOTA
2426 /* Read data from quotafile */
2427 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2428                                size_t len, loff_t off)
2429 {
2430         struct inode *inode = sb_dqopt(sb)->files[type];
2431         struct address_space *mapping = inode->i_mapping;
2432         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2433         int offset = off & (sb->s_blocksize - 1);
2434         int tocopy;
2435         size_t toread;
2436         loff_t i_size = i_size_read(inode);
2437         struct page *page;
2438         char *kaddr;
2439
2440         if (off > i_size)
2441                 return 0;
2442
2443         if (off + len > i_size)
2444                 len = i_size - off;
2445         toread = len;
2446         while (toread > 0) {
2447                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2448 repeat:
2449                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2450                 if (IS_ERR(page)) {
2451                         if (PTR_ERR(page) == -ENOMEM) {
2452                                 memalloc_retry_wait(GFP_NOFS);
2453                                 goto repeat;
2454                         }
2455                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2456                         return PTR_ERR(page);
2457                 }
2458
2459                 lock_page(page);
2460
2461                 if (unlikely(page->mapping != mapping)) {
2462                         f2fs_put_page(page, 1);
2463                         goto repeat;
2464                 }
2465                 if (unlikely(!PageUptodate(page))) {
2466                         f2fs_put_page(page, 1);
2467                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2468                         return -EIO;
2469                 }
2470
2471                 kaddr = kmap_atomic(page);
2472                 memcpy(data, kaddr + offset, tocopy);
2473                 kunmap_atomic(kaddr);
2474                 f2fs_put_page(page, 1);
2475
2476                 offset = 0;
2477                 toread -= tocopy;
2478                 data += tocopy;
2479                 blkidx++;
2480         }
2481         return len;
2482 }
2483
2484 /* Write to quotafile */
2485 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2486                                 const char *data, size_t len, loff_t off)
2487 {
2488         struct inode *inode = sb_dqopt(sb)->files[type];
2489         struct address_space *mapping = inode->i_mapping;
2490         const struct address_space_operations *a_ops = mapping->a_ops;
2491         int offset = off & (sb->s_blocksize - 1);
2492         size_t towrite = len;
2493         struct page *page;
2494         void *fsdata = NULL;
2495         char *kaddr;
2496         int err = 0;
2497         int tocopy;
2498
2499         while (towrite > 0) {
2500                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2501                                                                 towrite);
2502 retry:
2503                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2504                                                         &page, &fsdata);
2505                 if (unlikely(err)) {
2506                         if (err == -ENOMEM) {
2507                                 congestion_wait(BLK_RW_ASYNC,
2508                                                 DEFAULT_IO_TIMEOUT);
2509                                 goto retry;
2510                         }
2511                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2512                         break;
2513                 }
2514
2515                 kaddr = kmap_atomic(page);
2516                 memcpy(kaddr + offset, data, tocopy);
2517                 kunmap_atomic(kaddr);
2518                 flush_dcache_page(page);
2519
2520                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2521                                                 page, fsdata);
2522                 offset = 0;
2523                 towrite -= tocopy;
2524                 off += tocopy;
2525                 data += tocopy;
2526                 cond_resched();
2527         }
2528
2529         if (len == towrite)
2530                 return err;
2531         inode->i_mtime = inode->i_ctime = current_time(inode);
2532         f2fs_mark_inode_dirty_sync(inode, false);
2533         return len - towrite;
2534 }
2535
2536 int f2fs_dquot_initialize(struct inode *inode)
2537 {
2538         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2539                 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2540                 return -ESRCH;
2541         }
2542
2543         return dquot_initialize(inode);
2544 }
2545
2546 static struct dquot **f2fs_get_dquots(struct inode *inode)
2547 {
2548         return F2FS_I(inode)->i_dquot;
2549 }
2550
2551 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2552 {
2553         return &F2FS_I(inode)->i_reserved_quota;
2554 }
2555
2556 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2557 {
2558         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2559                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2560                 return 0;
2561         }
2562
2563         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2564                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2565 }
2566
2567 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2568 {
2569         int enabled = 0;
2570         int i, err;
2571
2572         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2573                 err = f2fs_enable_quotas(sbi->sb);
2574                 if (err) {
2575                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2576                         return 0;
2577                 }
2578                 return 1;
2579         }
2580
2581         for (i = 0; i < MAXQUOTAS; i++) {
2582                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2583                         err = f2fs_quota_on_mount(sbi, i);
2584                         if (!err) {
2585                                 enabled = 1;
2586                                 continue;
2587                         }
2588                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2589                                  err, i);
2590                 }
2591         }
2592         return enabled;
2593 }
2594
2595 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2596                              unsigned int flags)
2597 {
2598         struct inode *qf_inode;
2599         unsigned long qf_inum;
2600         int err;
2601
2602         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2603
2604         qf_inum = f2fs_qf_ino(sb, type);
2605         if (!qf_inum)
2606                 return -EPERM;
2607
2608         qf_inode = f2fs_iget(sb, qf_inum);
2609         if (IS_ERR(qf_inode)) {
2610                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2611                 return PTR_ERR(qf_inode);
2612         }
2613
2614         /* Don't account quota for quota files to avoid recursion */
2615         qf_inode->i_flags |= S_NOQUOTA;
2616         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2617         iput(qf_inode);
2618         return err;
2619 }
2620
2621 static int f2fs_enable_quotas(struct super_block *sb)
2622 {
2623         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2624         int type, err = 0;
2625         unsigned long qf_inum;
2626         bool quota_mopt[MAXQUOTAS] = {
2627                 test_opt(sbi, USRQUOTA),
2628                 test_opt(sbi, GRPQUOTA),
2629                 test_opt(sbi, PRJQUOTA),
2630         };
2631
2632         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2633                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2634                 return 0;
2635         }
2636
2637         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2638
2639         for (type = 0; type < MAXQUOTAS; type++) {
2640                 qf_inum = f2fs_qf_ino(sb, type);
2641                 if (qf_inum) {
2642                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2643                                 DQUOT_USAGE_ENABLED |
2644                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2645                         if (err) {
2646                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2647                                          type, err);
2648                                 for (type--; type >= 0; type--)
2649                                         dquot_quota_off(sb, type);
2650                                 set_sbi_flag(F2FS_SB(sb),
2651                                                 SBI_QUOTA_NEED_REPAIR);
2652                                 return err;
2653                         }
2654                 }
2655         }
2656         return 0;
2657 }
2658
2659 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2660 {
2661         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2662         struct address_space *mapping = dqopt->files[type]->i_mapping;
2663         int ret = 0;
2664
2665         ret = dquot_writeback_dquots(sbi->sb, type);
2666         if (ret)
2667                 goto out;
2668
2669         ret = filemap_fdatawrite(mapping);
2670         if (ret)
2671                 goto out;
2672
2673         /* if we are using journalled quota */
2674         if (is_journalled_quota(sbi))
2675                 goto out;
2676
2677         ret = filemap_fdatawait(mapping);
2678
2679         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2680 out:
2681         if (ret)
2682                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2683         return ret;
2684 }
2685
2686 int f2fs_quota_sync(struct super_block *sb, int type)
2687 {
2688         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2689         struct quota_info *dqopt = sb_dqopt(sb);
2690         int cnt;
2691         int ret;
2692
2693         /*
2694          * Now when everything is written we can discard the pagecache so
2695          * that userspace sees the changes.
2696          */
2697         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2698
2699                 if (type != -1 && cnt != type)
2700                         continue;
2701
2702                 if (!sb_has_quota_active(sb, type))
2703                         return 0;
2704
2705                 inode_lock(dqopt->files[cnt]);
2706
2707                 /*
2708                  * do_quotactl
2709                  *  f2fs_quota_sync
2710                  *  down_read(quota_sem)
2711                  *  dquot_writeback_dquots()
2712                  *  f2fs_dquot_commit
2713                  *                            block_operation
2714                  *                            down_read(quota_sem)
2715                  */
2716                 f2fs_lock_op(sbi);
2717                 down_read(&sbi->quota_sem);
2718
2719                 ret = f2fs_quota_sync_file(sbi, cnt);
2720
2721                 up_read(&sbi->quota_sem);
2722                 f2fs_unlock_op(sbi);
2723
2724                 inode_unlock(dqopt->files[cnt]);
2725
2726                 if (ret)
2727                         break;
2728         }
2729         return ret;
2730 }
2731
2732 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2733                                                         const struct path *path)
2734 {
2735         struct inode *inode;
2736         int err;
2737
2738         /* if quota sysfile exists, deny enabling quota with specific file */
2739         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2740                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2741                 return -EBUSY;
2742         }
2743
2744         err = f2fs_quota_sync(sb, type);
2745         if (err)
2746                 return err;
2747
2748         err = dquot_quota_on(sb, type, format_id, path);
2749         if (err)
2750                 return err;
2751
2752         inode = d_inode(path->dentry);
2753
2754         inode_lock(inode);
2755         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2756         f2fs_set_inode_flags(inode);
2757         inode_unlock(inode);
2758         f2fs_mark_inode_dirty_sync(inode, false);
2759
2760         return 0;
2761 }
2762
2763 static int __f2fs_quota_off(struct super_block *sb, int type)
2764 {
2765         struct inode *inode = sb_dqopt(sb)->files[type];
2766         int err;
2767
2768         if (!inode || !igrab(inode))
2769                 return dquot_quota_off(sb, type);
2770
2771         err = f2fs_quota_sync(sb, type);
2772         if (err)
2773                 goto out_put;
2774
2775         err = dquot_quota_off(sb, type);
2776         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2777                 goto out_put;
2778
2779         inode_lock(inode);
2780         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2781         f2fs_set_inode_flags(inode);
2782         inode_unlock(inode);
2783         f2fs_mark_inode_dirty_sync(inode, false);
2784 out_put:
2785         iput(inode);
2786         return err;
2787 }
2788
2789 static int f2fs_quota_off(struct super_block *sb, int type)
2790 {
2791         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2792         int err;
2793
2794         err = __f2fs_quota_off(sb, type);
2795
2796         /*
2797          * quotactl can shutdown journalled quota, result in inconsistence
2798          * between quota record and fs data by following updates, tag the
2799          * flag to let fsck be aware of it.
2800          */
2801         if (is_journalled_quota(sbi))
2802                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2803         return err;
2804 }
2805
2806 void f2fs_quota_off_umount(struct super_block *sb)
2807 {
2808         int type;
2809         int err;
2810
2811         for (type = 0; type < MAXQUOTAS; type++) {
2812                 err = __f2fs_quota_off(sb, type);
2813                 if (err) {
2814                         int ret = dquot_quota_off(sb, type);
2815
2816                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2817                                  type, err, ret);
2818                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2819                 }
2820         }
2821         /*
2822          * In case of checkpoint=disable, we must flush quota blocks.
2823          * This can cause NULL exception for node_inode in end_io, since
2824          * put_super already dropped it.
2825          */
2826         sync_filesystem(sb);
2827 }
2828
2829 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2830 {
2831         struct quota_info *dqopt = sb_dqopt(sb);
2832         int type;
2833
2834         for (type = 0; type < MAXQUOTAS; type++) {
2835                 if (!dqopt->files[type])
2836                         continue;
2837                 f2fs_inode_synced(dqopt->files[type]);
2838         }
2839 }
2840
2841 static int f2fs_dquot_commit(struct dquot *dquot)
2842 {
2843         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2844         int ret;
2845
2846         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2847         ret = dquot_commit(dquot);
2848         if (ret < 0)
2849                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2850         up_read(&sbi->quota_sem);
2851         return ret;
2852 }
2853
2854 static int f2fs_dquot_acquire(struct dquot *dquot)
2855 {
2856         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2857         int ret;
2858
2859         down_read(&sbi->quota_sem);
2860         ret = dquot_acquire(dquot);
2861         if (ret < 0)
2862                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2863         up_read(&sbi->quota_sem);
2864         return ret;
2865 }
2866
2867 static int f2fs_dquot_release(struct dquot *dquot)
2868 {
2869         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2870         int ret = dquot_release(dquot);
2871
2872         if (ret < 0)
2873                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2874         return ret;
2875 }
2876
2877 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2878 {
2879         struct super_block *sb = dquot->dq_sb;
2880         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2881         int ret = dquot_mark_dquot_dirty(dquot);
2882
2883         /* if we are using journalled quota */
2884         if (is_journalled_quota(sbi))
2885                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2886
2887         return ret;
2888 }
2889
2890 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2891 {
2892         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2893         int ret = dquot_commit_info(sb, type);
2894
2895         if (ret < 0)
2896                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2897         return ret;
2898 }
2899
2900 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2901 {
2902         *projid = F2FS_I(inode)->i_projid;
2903         return 0;
2904 }
2905
2906 static const struct dquot_operations f2fs_quota_operations = {
2907         .get_reserved_space = f2fs_get_reserved_space,
2908         .write_dquot    = f2fs_dquot_commit,
2909         .acquire_dquot  = f2fs_dquot_acquire,
2910         .release_dquot  = f2fs_dquot_release,
2911         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2912         .write_info     = f2fs_dquot_commit_info,
2913         .alloc_dquot    = dquot_alloc,
2914         .destroy_dquot  = dquot_destroy,
2915         .get_projid     = f2fs_get_projid,
2916         .get_next_id    = dquot_get_next_id,
2917 };
2918
2919 static const struct quotactl_ops f2fs_quotactl_ops = {
2920         .quota_on       = f2fs_quota_on,
2921         .quota_off      = f2fs_quota_off,
2922         .quota_sync     = f2fs_quota_sync,
2923         .get_state      = dquot_get_state,
2924         .set_info       = dquot_set_dqinfo,
2925         .get_dqblk      = dquot_get_dqblk,
2926         .set_dqblk      = dquot_set_dqblk,
2927         .get_nextdqblk  = dquot_get_next_dqblk,
2928 };
2929 #else
2930 int f2fs_dquot_initialize(struct inode *inode)
2931 {
2932         return 0;
2933 }
2934
2935 int f2fs_quota_sync(struct super_block *sb, int type)
2936 {
2937         return 0;
2938 }
2939
2940 void f2fs_quota_off_umount(struct super_block *sb)
2941 {
2942 }
2943 #endif
2944
2945 static const struct super_operations f2fs_sops = {
2946         .alloc_inode    = f2fs_alloc_inode,
2947         .free_inode     = f2fs_free_inode,
2948         .drop_inode     = f2fs_drop_inode,
2949         .write_inode    = f2fs_write_inode,
2950         .dirty_inode    = f2fs_dirty_inode,
2951         .show_options   = f2fs_show_options,
2952 #ifdef CONFIG_QUOTA
2953         .quota_read     = f2fs_quota_read,
2954         .quota_write    = f2fs_quota_write,
2955         .get_dquots     = f2fs_get_dquots,
2956 #endif
2957         .evict_inode    = f2fs_evict_inode,
2958         .put_super      = f2fs_put_super,
2959         .sync_fs        = f2fs_sync_fs,
2960         .freeze_fs      = f2fs_freeze,
2961         .unfreeze_fs    = f2fs_unfreeze,
2962         .statfs         = f2fs_statfs,
2963         .remount_fs     = f2fs_remount,
2964 };
2965
2966 #ifdef CONFIG_FS_ENCRYPTION
2967 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2968 {
2969         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2970                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2971                                 ctx, len, NULL);
2972 }
2973
2974 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2975                                                         void *fs_data)
2976 {
2977         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2978
2979         /*
2980          * Encrypting the root directory is not allowed because fsck
2981          * expects lost+found directory to exist and remain unencrypted
2982          * if LOST_FOUND feature is enabled.
2983          *
2984          */
2985         if (f2fs_sb_has_lost_found(sbi) &&
2986                         inode->i_ino == F2FS_ROOT_INO(sbi))
2987                 return -EPERM;
2988
2989         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2990                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2991                                 ctx, len, fs_data, XATTR_CREATE);
2992 }
2993
2994 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2995 {
2996         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2997 }
2998
2999 static bool f2fs_has_stable_inodes(struct super_block *sb)
3000 {
3001         return true;
3002 }
3003
3004 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3005                                        int *ino_bits_ret, int *lblk_bits_ret)
3006 {
3007         *ino_bits_ret = 8 * sizeof(nid_t);
3008         *lblk_bits_ret = 8 * sizeof(block_t);
3009 }
3010
3011 static int f2fs_get_num_devices(struct super_block *sb)
3012 {
3013         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3014
3015         if (f2fs_is_multi_device(sbi))
3016                 return sbi->s_ndevs;
3017         return 1;
3018 }
3019
3020 static void f2fs_get_devices(struct super_block *sb,
3021                              struct request_queue **devs)
3022 {
3023         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3024         int i;
3025
3026         for (i = 0; i < sbi->s_ndevs; i++)
3027                 devs[i] = bdev_get_queue(FDEV(i).bdev);
3028 }
3029
3030 static const struct fscrypt_operations f2fs_cryptops = {
3031         .key_prefix             = "f2fs:",
3032         .get_context            = f2fs_get_context,
3033         .set_context            = f2fs_set_context,
3034         .get_dummy_policy       = f2fs_get_dummy_policy,
3035         .empty_dir              = f2fs_empty_dir,
3036         .has_stable_inodes      = f2fs_has_stable_inodes,
3037         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3038         .get_num_devices        = f2fs_get_num_devices,
3039         .get_devices            = f2fs_get_devices,
3040 };
3041 #endif
3042
3043 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3044                 u64 ino, u32 generation)
3045 {
3046         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3047         struct inode *inode;
3048
3049         if (f2fs_check_nid_range(sbi, ino))
3050                 return ERR_PTR(-ESTALE);
3051
3052         /*
3053          * f2fs_iget isn't quite right if the inode is currently unallocated!
3054          * However f2fs_iget currently does appropriate checks to handle stale
3055          * inodes so everything is OK.
3056          */
3057         inode = f2fs_iget(sb, ino);
3058         if (IS_ERR(inode))
3059                 return ERR_CAST(inode);
3060         if (unlikely(generation && inode->i_generation != generation)) {
3061                 /* we didn't find the right inode.. */
3062                 iput(inode);
3063                 return ERR_PTR(-ESTALE);
3064         }
3065         return inode;
3066 }
3067
3068 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3069                 int fh_len, int fh_type)
3070 {
3071         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3072                                     f2fs_nfs_get_inode);
3073 }
3074
3075 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3076                 int fh_len, int fh_type)
3077 {
3078         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3079                                     f2fs_nfs_get_inode);
3080 }
3081
3082 static const struct export_operations f2fs_export_ops = {
3083         .fh_to_dentry = f2fs_fh_to_dentry,
3084         .fh_to_parent = f2fs_fh_to_parent,
3085         .get_parent = f2fs_get_parent,
3086 };
3087
3088 loff_t max_file_blocks(struct inode *inode)
3089 {
3090         loff_t result = 0;
3091         loff_t leaf_count;
3092
3093         /*
3094          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3095          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3096          * space in inode.i_addr, it will be more safe to reassign
3097          * result as zero.
3098          */
3099
3100         if (inode && f2fs_compressed_file(inode))
3101                 leaf_count = ADDRS_PER_BLOCK(inode);
3102         else
3103                 leaf_count = DEF_ADDRS_PER_BLOCK;
3104
3105         /* two direct node blocks */
3106         result += (leaf_count * 2);
3107
3108         /* two indirect node blocks */
3109         leaf_count *= NIDS_PER_BLOCK;
3110         result += (leaf_count * 2);
3111
3112         /* one double indirect node block */
3113         leaf_count *= NIDS_PER_BLOCK;
3114         result += leaf_count;
3115
3116         return result;
3117 }
3118
3119 static int __f2fs_commit_super(struct buffer_head *bh,
3120                         struct f2fs_super_block *super)
3121 {
3122         lock_buffer(bh);
3123         if (super)
3124                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3125         set_buffer_dirty(bh);
3126         unlock_buffer(bh);
3127
3128         /* it's rare case, we can do fua all the time */
3129         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3130 }
3131
3132 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3133                                         struct buffer_head *bh)
3134 {
3135         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3136                                         (bh->b_data + F2FS_SUPER_OFFSET);
3137         struct super_block *sb = sbi->sb;
3138         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3139         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3140         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3141         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3142         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3143         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3144         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3145         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3146         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3147         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3148         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3149         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3150         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3151         u64 main_end_blkaddr = main_blkaddr +
3152                                 (segment_count_main << log_blocks_per_seg);
3153         u64 seg_end_blkaddr = segment0_blkaddr +
3154                                 (segment_count << log_blocks_per_seg);
3155
3156         if (segment0_blkaddr != cp_blkaddr) {
3157                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3158                           segment0_blkaddr, cp_blkaddr);
3159                 return true;
3160         }
3161
3162         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3163                                                         sit_blkaddr) {
3164                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3165                           cp_blkaddr, sit_blkaddr,
3166                           segment_count_ckpt << log_blocks_per_seg);
3167                 return true;
3168         }
3169
3170         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3171                                                         nat_blkaddr) {
3172                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3173                           sit_blkaddr, nat_blkaddr,
3174                           segment_count_sit << log_blocks_per_seg);
3175                 return true;
3176         }
3177
3178         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3179                                                         ssa_blkaddr) {
3180                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3181                           nat_blkaddr, ssa_blkaddr,
3182                           segment_count_nat << log_blocks_per_seg);
3183                 return true;
3184         }
3185
3186         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3187                                                         main_blkaddr) {
3188                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3189                           ssa_blkaddr, main_blkaddr,
3190                           segment_count_ssa << log_blocks_per_seg);
3191                 return true;
3192         }
3193
3194         if (main_end_blkaddr > seg_end_blkaddr) {
3195                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3196                           main_blkaddr, seg_end_blkaddr,
3197                           segment_count_main << log_blocks_per_seg);
3198                 return true;
3199         } else if (main_end_blkaddr < seg_end_blkaddr) {
3200                 int err = 0;
3201                 char *res;
3202
3203                 /* fix in-memory information all the time */
3204                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3205                                 segment0_blkaddr) >> log_blocks_per_seg);
3206
3207                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3208                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3209                         res = "internally";
3210                 } else {
3211                         err = __f2fs_commit_super(bh, NULL);
3212                         res = err ? "failed" : "done";
3213                 }
3214                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3215                           res, main_blkaddr, seg_end_blkaddr,
3216                           segment_count_main << log_blocks_per_seg);
3217                 if (err)
3218                         return true;
3219         }
3220         return false;
3221 }
3222
3223 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3224                                 struct buffer_head *bh)
3225 {
3226         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3227         block_t total_sections, blocks_per_seg;
3228         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3229                                         (bh->b_data + F2FS_SUPER_OFFSET);
3230         size_t crc_offset = 0;
3231         __u32 crc = 0;
3232
3233         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3234                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3235                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3236                 return -EINVAL;
3237         }
3238
3239         /* Check checksum_offset and crc in superblock */
3240         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3241                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3242                 if (crc_offset !=
3243                         offsetof(struct f2fs_super_block, crc)) {
3244                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3245                                   crc_offset);
3246                         return -EFSCORRUPTED;
3247                 }
3248                 crc = le32_to_cpu(raw_super->crc);
3249                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3250                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3251                         return -EFSCORRUPTED;
3252                 }
3253         }
3254
3255         /* Currently, support only 4KB block size */
3256         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3257                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3258                           le32_to_cpu(raw_super->log_blocksize),
3259                           F2FS_BLKSIZE_BITS);
3260                 return -EFSCORRUPTED;
3261         }
3262
3263         /* check log blocks per segment */
3264         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3265                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3266                           le32_to_cpu(raw_super->log_blocks_per_seg));
3267                 return -EFSCORRUPTED;
3268         }
3269
3270         /* Currently, support 512/1024/2048/4096 bytes sector size */
3271         if (le32_to_cpu(raw_super->log_sectorsize) >
3272                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3273                 le32_to_cpu(raw_super->log_sectorsize) <
3274                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3275                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3276                           le32_to_cpu(raw_super->log_sectorsize));
3277                 return -EFSCORRUPTED;
3278         }
3279         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3280                 le32_to_cpu(raw_super->log_sectorsize) !=
3281                         F2FS_MAX_LOG_SECTOR_SIZE) {
3282                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3283                           le32_to_cpu(raw_super->log_sectors_per_block),
3284                           le32_to_cpu(raw_super->log_sectorsize));
3285                 return -EFSCORRUPTED;
3286         }
3287
3288         segment_count = le32_to_cpu(raw_super->segment_count);
3289         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3290         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3291         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3292         total_sections = le32_to_cpu(raw_super->section_count);
3293
3294         /* blocks_per_seg should be 512, given the above check */
3295         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3296
3297         if (segment_count > F2FS_MAX_SEGMENT ||
3298                                 segment_count < F2FS_MIN_SEGMENTS) {
3299                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3300                 return -EFSCORRUPTED;
3301         }
3302
3303         if (total_sections > segment_count_main || total_sections < 1 ||
3304                         segs_per_sec > segment_count || !segs_per_sec) {
3305                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3306                           segment_count, total_sections, segs_per_sec);
3307                 return -EFSCORRUPTED;
3308         }
3309
3310         if (segment_count_main != total_sections * segs_per_sec) {
3311                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3312                           segment_count_main, total_sections, segs_per_sec);
3313                 return -EFSCORRUPTED;
3314         }
3315
3316         if ((segment_count / segs_per_sec) < total_sections) {
3317                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3318                           segment_count, segs_per_sec, total_sections);
3319                 return -EFSCORRUPTED;
3320         }
3321
3322         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3323                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3324                           segment_count, le64_to_cpu(raw_super->block_count));
3325                 return -EFSCORRUPTED;
3326         }
3327
3328         if (RDEV(0).path[0]) {
3329                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3330                 int i = 1;
3331
3332                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3333                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3334                         i++;
3335                 }
3336                 if (segment_count != dev_seg_count) {
3337                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3338                                         segment_count, dev_seg_count);
3339                         return -EFSCORRUPTED;
3340                 }
3341         } else {
3342                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3343                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3344                         f2fs_info(sbi, "Zoned block device path is missing");
3345                         return -EFSCORRUPTED;
3346                 }
3347         }
3348
3349         if (secs_per_zone > total_sections || !secs_per_zone) {
3350                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3351                           secs_per_zone, total_sections);
3352                 return -EFSCORRUPTED;
3353         }
3354         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3355                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3356                         (le32_to_cpu(raw_super->extension_count) +
3357                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3358                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3359                           le32_to_cpu(raw_super->extension_count),
3360                           raw_super->hot_ext_count,
3361                           F2FS_MAX_EXTENSION);
3362                 return -EFSCORRUPTED;
3363         }
3364
3365         if (le32_to_cpu(raw_super->cp_payload) >=
3366                                 (blocks_per_seg - F2FS_CP_PACKS -
3367                                 NR_CURSEG_PERSIST_TYPE)) {
3368                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3369                           le32_to_cpu(raw_super->cp_payload),
3370                           blocks_per_seg - F2FS_CP_PACKS -
3371                           NR_CURSEG_PERSIST_TYPE);
3372                 return -EFSCORRUPTED;
3373         }
3374
3375         /* check reserved ino info */
3376         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3377                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3378                 le32_to_cpu(raw_super->root_ino) != 3) {
3379                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3380                           le32_to_cpu(raw_super->node_ino),
3381                           le32_to_cpu(raw_super->meta_ino),
3382                           le32_to_cpu(raw_super->root_ino));
3383                 return -EFSCORRUPTED;
3384         }
3385
3386         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3387         if (sanity_check_area_boundary(sbi, bh))
3388                 return -EFSCORRUPTED;
3389
3390         return 0;
3391 }
3392
3393 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3394 {
3395         unsigned int total, fsmeta;
3396         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3397         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3398         unsigned int ovp_segments, reserved_segments;
3399         unsigned int main_segs, blocks_per_seg;
3400         unsigned int sit_segs, nat_segs;
3401         unsigned int sit_bitmap_size, nat_bitmap_size;
3402         unsigned int log_blocks_per_seg;
3403         unsigned int segment_count_main;
3404         unsigned int cp_pack_start_sum, cp_payload;
3405         block_t user_block_count, valid_user_blocks;
3406         block_t avail_node_count, valid_node_count;
3407         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3408         int i, j;
3409
3410         total = le32_to_cpu(raw_super->segment_count);
3411         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3412         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3413         fsmeta += sit_segs;
3414         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3415         fsmeta += nat_segs;
3416         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3417         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3418
3419         if (unlikely(fsmeta >= total))
3420                 return 1;
3421
3422         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3423         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3424
3425         if (!f2fs_sb_has_readonly(sbi) &&
3426                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3427                         ovp_segments == 0 || reserved_segments == 0)) {
3428                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3429                 return 1;
3430         }
3431         user_block_count = le64_to_cpu(ckpt->user_block_count);
3432         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3433                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3434         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3435         if (!user_block_count || user_block_count >=
3436                         segment_count_main << log_blocks_per_seg) {
3437                 f2fs_err(sbi, "Wrong user_block_count: %u",
3438                          user_block_count);
3439                 return 1;
3440         }
3441
3442         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3443         if (valid_user_blocks > user_block_count) {
3444                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3445                          valid_user_blocks, user_block_count);
3446                 return 1;
3447         }
3448
3449         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3450         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3451         if (valid_node_count > avail_node_count) {
3452                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3453                          valid_node_count, avail_node_count);
3454                 return 1;
3455         }
3456
3457         main_segs = le32_to_cpu(raw_super->segment_count_main);
3458         blocks_per_seg = sbi->blocks_per_seg;
3459
3460         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3461                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3462                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3463                         return 1;
3464
3465                 if (f2fs_sb_has_readonly(sbi))
3466                         goto check_data;
3467
3468                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3469                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3470                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3471                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3472                                          i, j,
3473                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3474                                 return 1;
3475                         }
3476                 }
3477         }
3478 check_data:
3479         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3480                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3481                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3482                         return 1;
3483
3484                 if (f2fs_sb_has_readonly(sbi))
3485                         goto skip_cross;
3486
3487                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3488                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3489                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3490                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3491                                          i, j,
3492                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3493                                 return 1;
3494                         }
3495                 }
3496         }
3497         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3498                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3499                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3500                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3501                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3502                                          i, j,
3503                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3504                                 return 1;
3505                         }
3506                 }
3507         }
3508 skip_cross:
3509         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3510         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3511
3512         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3513                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3514                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3515                          sit_bitmap_size, nat_bitmap_size);
3516                 return 1;
3517         }
3518
3519         cp_pack_start_sum = __start_sum_addr(sbi);
3520         cp_payload = __cp_payload(sbi);
3521         if (cp_pack_start_sum < cp_payload + 1 ||
3522                 cp_pack_start_sum > blocks_per_seg - 1 -
3523                         NR_CURSEG_PERSIST_TYPE) {
3524                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3525                          cp_pack_start_sum);
3526                 return 1;
3527         }
3528
3529         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3530                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3531                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3532                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3533                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3534                           le32_to_cpu(ckpt->checksum_offset));
3535                 return 1;
3536         }
3537
3538         nat_blocks = nat_segs << log_blocks_per_seg;
3539         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3540         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3541         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3542                 (cp_payload + F2FS_CP_PACKS +
3543                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3544                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3545                           cp_payload, nat_bits_blocks);
3546                 return 1;
3547         }
3548
3549         if (unlikely(f2fs_cp_error(sbi))) {
3550                 f2fs_err(sbi, "A bug case: need to run fsck");
3551                 return 1;
3552         }
3553         return 0;
3554 }
3555
3556 static void init_sb_info(struct f2fs_sb_info *sbi)
3557 {
3558         struct f2fs_super_block *raw_super = sbi->raw_super;
3559         int i;
3560
3561         sbi->log_sectors_per_block =
3562                 le32_to_cpu(raw_super->log_sectors_per_block);
3563         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3564         sbi->blocksize = 1 << sbi->log_blocksize;
3565         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3566         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3567         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3568         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3569         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3570         sbi->total_node_count =
3571                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3572                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3573         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3574         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3575         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3576         sbi->cur_victim_sec = NULL_SECNO;
3577         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3578         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3579         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3580         sbi->migration_granularity = sbi->segs_per_sec;
3581         sbi->seq_file_ra_mul = MIN_RA_MUL;
3582         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3583         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3584         spin_lock_init(&sbi->gc_urgent_high_lock);
3585
3586         sbi->dir_level = DEF_DIR_LEVEL;
3587         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3588         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3589         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3590         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3591         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3592         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3593                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3594         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3595
3596         for (i = 0; i < NR_COUNT_TYPE; i++)
3597                 atomic_set(&sbi->nr_pages[i], 0);
3598
3599         for (i = 0; i < META; i++)
3600                 atomic_set(&sbi->wb_sync_req[i], 0);
3601
3602         INIT_LIST_HEAD(&sbi->s_list);
3603         mutex_init(&sbi->umount_mutex);
3604         init_rwsem(&sbi->io_order_lock);
3605         spin_lock_init(&sbi->cp_lock);
3606
3607         sbi->dirty_device = 0;
3608         spin_lock_init(&sbi->dev_lock);
3609
3610         init_rwsem(&sbi->sb_lock);
3611         init_rwsem(&sbi->pin_sem);
3612 }
3613
3614 static int init_percpu_info(struct f2fs_sb_info *sbi)
3615 {
3616         int err;
3617
3618         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3619         if (err)
3620                 return err;
3621
3622         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3623                                                                 GFP_KERNEL);
3624         if (err)
3625                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3626
3627         return err;
3628 }
3629
3630 #ifdef CONFIG_BLK_DEV_ZONED
3631
3632 struct f2fs_report_zones_args {
3633         struct f2fs_dev_info *dev;
3634         bool zone_cap_mismatch;
3635 };
3636
3637 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3638                               void *data)
3639 {
3640         struct f2fs_report_zones_args *rz_args = data;
3641
3642         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3643                 return 0;
3644
3645         set_bit(idx, rz_args->dev->blkz_seq);
3646         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3647                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3648         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3649                 rz_args->zone_cap_mismatch = true;
3650
3651         return 0;
3652 }
3653
3654 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3655 {
3656         struct block_device *bdev = FDEV(devi).bdev;
3657         sector_t nr_sectors = bdev_nr_sectors(bdev);
3658         struct f2fs_report_zones_args rep_zone_arg;
3659         int ret;
3660
3661         if (!f2fs_sb_has_blkzoned(sbi))
3662                 return 0;
3663
3664         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3665                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3666                 return -EINVAL;
3667         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3668         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3669                                 __ilog2_u32(sbi->blocks_per_blkz))
3670                 return -EINVAL;
3671         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3672         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3673                                         sbi->log_blocks_per_blkz;
3674         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3675                 FDEV(devi).nr_blkz++;
3676
3677         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3678                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3679                                         * sizeof(unsigned long),
3680                                         GFP_KERNEL);
3681         if (!FDEV(devi).blkz_seq)
3682                 return -ENOMEM;
3683
3684         /* Get block zones type and zone-capacity */
3685         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3686                                         FDEV(devi).nr_blkz * sizeof(block_t),
3687                                         GFP_KERNEL);
3688         if (!FDEV(devi).zone_capacity_blocks)
3689                 return -ENOMEM;
3690
3691         rep_zone_arg.dev = &FDEV(devi);
3692         rep_zone_arg.zone_cap_mismatch = false;
3693
3694         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3695                                   &rep_zone_arg);
3696         if (ret < 0)
3697                 return ret;
3698
3699         if (!rep_zone_arg.zone_cap_mismatch) {
3700                 kfree(FDEV(devi).zone_capacity_blocks);
3701                 FDEV(devi).zone_capacity_blocks = NULL;
3702         }
3703
3704         return 0;
3705 }
3706 #endif
3707
3708 /*
3709  * Read f2fs raw super block.
3710  * Because we have two copies of super block, so read both of them
3711  * to get the first valid one. If any one of them is broken, we pass
3712  * them recovery flag back to the caller.
3713  */
3714 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3715                         struct f2fs_super_block **raw_super,
3716                         int *valid_super_block, int *recovery)
3717 {
3718         struct super_block *sb = sbi->sb;
3719         int block;
3720         struct buffer_head *bh;
3721         struct f2fs_super_block *super;
3722         int err = 0;
3723
3724         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3725         if (!super)
3726                 return -ENOMEM;
3727
3728         for (block = 0; block < 2; block++) {
3729                 bh = sb_bread(sb, block);
3730                 if (!bh) {
3731                         f2fs_err(sbi, "Unable to read %dth superblock",
3732                                  block + 1);
3733                         err = -EIO;
3734                         *recovery = 1;
3735                         continue;
3736                 }
3737
3738                 /* sanity checking of raw super */
3739                 err = sanity_check_raw_super(sbi, bh);
3740                 if (err) {
3741                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3742                                  block + 1);
3743                         brelse(bh);
3744                         *recovery = 1;
3745                         continue;
3746                 }
3747
3748                 if (!*raw_super) {
3749                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3750                                                         sizeof(*super));
3751                         *valid_super_block = block;
3752                         *raw_super = super;
3753                 }
3754                 brelse(bh);
3755         }
3756
3757         /* No valid superblock */
3758         if (!*raw_super)
3759                 kfree(super);
3760         else
3761                 err = 0;
3762
3763         return err;
3764 }
3765
3766 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3767 {
3768         struct buffer_head *bh;
3769         __u32 crc = 0;
3770         int err;
3771
3772         if ((recover && f2fs_readonly(sbi->sb)) ||
3773                                 bdev_read_only(sbi->sb->s_bdev)) {
3774                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3775                 return -EROFS;
3776         }
3777
3778         /* we should update superblock crc here */
3779         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3780                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3781                                 offsetof(struct f2fs_super_block, crc));
3782                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3783         }
3784
3785         /* write back-up superblock first */
3786         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3787         if (!bh)
3788                 return -EIO;
3789         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3790         brelse(bh);
3791
3792         /* if we are in recovery path, skip writing valid superblock */
3793         if (recover || err)
3794                 return err;
3795
3796         /* write current valid superblock */
3797         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3798         if (!bh)
3799                 return -EIO;
3800         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3801         brelse(bh);
3802         return err;
3803 }
3804
3805 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3806 {
3807         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3808         unsigned int max_devices = MAX_DEVICES;
3809         unsigned int logical_blksize;
3810         int i;
3811
3812         /* Initialize single device information */
3813         if (!RDEV(0).path[0]) {
3814                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3815                         return 0;
3816                 max_devices = 1;
3817         }
3818
3819         /*
3820          * Initialize multiple devices information, or single
3821          * zoned block device information.
3822          */
3823         sbi->devs = f2fs_kzalloc(sbi,
3824                                  array_size(max_devices,
3825                                             sizeof(struct f2fs_dev_info)),
3826                                  GFP_KERNEL);
3827         if (!sbi->devs)
3828                 return -ENOMEM;
3829
3830         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3831         sbi->aligned_blksize = true;
3832
3833         for (i = 0; i < max_devices; i++) {
3834
3835                 if (i > 0 && !RDEV(i).path[0])
3836                         break;
3837
3838                 if (max_devices == 1) {
3839                         /* Single zoned block device mount */
3840                         FDEV(0).bdev =
3841                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3842                                         sbi->sb->s_mode, sbi->sb->s_type);
3843                 } else {
3844                         /* Multi-device mount */
3845                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3846                         FDEV(i).total_segments =
3847                                 le32_to_cpu(RDEV(i).total_segments);
3848                         if (i == 0) {
3849                                 FDEV(i).start_blk = 0;
3850                                 FDEV(i).end_blk = FDEV(i).start_blk +
3851                                     (FDEV(i).total_segments <<
3852                                     sbi->log_blocks_per_seg) - 1 +
3853                                     le32_to_cpu(raw_super->segment0_blkaddr);
3854                         } else {
3855                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3856                                 FDEV(i).end_blk = FDEV(i).start_blk +
3857                                         (FDEV(i).total_segments <<
3858                                         sbi->log_blocks_per_seg) - 1;
3859                         }
3860                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3861                                         sbi->sb->s_mode, sbi->sb->s_type);
3862                 }
3863                 if (IS_ERR(FDEV(i).bdev))
3864                         return PTR_ERR(FDEV(i).bdev);
3865
3866                 /* to release errored devices */
3867                 sbi->s_ndevs = i + 1;
3868
3869                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
3870                         sbi->aligned_blksize = false;
3871
3872 #ifdef CONFIG_BLK_DEV_ZONED
3873                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3874                                 !f2fs_sb_has_blkzoned(sbi)) {
3875                         f2fs_err(sbi, "Zoned block device feature not enabled");
3876                         return -EINVAL;
3877                 }
3878                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3879                         if (init_blkz_info(sbi, i)) {
3880                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3881                                 return -EINVAL;
3882                         }
3883                         if (max_devices == 1)
3884                                 break;
3885                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3886                                   i, FDEV(i).path,
3887                                   FDEV(i).total_segments,
3888                                   FDEV(i).start_blk, FDEV(i).end_blk,
3889                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3890                                   "Host-aware" : "Host-managed");
3891                         continue;
3892                 }
3893 #endif
3894                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3895                           i, FDEV(i).path,
3896                           FDEV(i).total_segments,
3897                           FDEV(i).start_blk, FDEV(i).end_blk);
3898         }
3899         f2fs_info(sbi,
3900                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3901         return 0;
3902 }
3903
3904 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3905 {
3906 #if IS_ENABLED(CONFIG_UNICODE)
3907         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3908                 const struct f2fs_sb_encodings *encoding_info;
3909                 struct unicode_map *encoding;
3910                 __u16 encoding_flags;
3911
3912                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
3913                 if (!encoding_info) {
3914                         f2fs_err(sbi,
3915                                  "Encoding requested by superblock is unknown");
3916                         return -EINVAL;
3917                 }
3918
3919                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
3920                 encoding = utf8_load(encoding_info->version);
3921                 if (IS_ERR(encoding)) {
3922                         f2fs_err(sbi,
3923                                  "can't mount with superblock charset: %s-%u.%u.%u "
3924                                  "not supported by the kernel. flags: 0x%x.",
3925                                  encoding_info->name,
3926                                  unicode_major(encoding_info->version),
3927                                  unicode_minor(encoding_info->version),
3928                                  unicode_rev(encoding_info->version),
3929                                  encoding_flags);
3930                         return PTR_ERR(encoding);
3931                 }
3932                 f2fs_info(sbi, "Using encoding defined by superblock: "
3933                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
3934                          unicode_major(encoding_info->version),
3935                          unicode_minor(encoding_info->version),
3936                          unicode_rev(encoding_info->version),
3937                          encoding_flags);
3938
3939                 sbi->sb->s_encoding = encoding;
3940                 sbi->sb->s_encoding_flags = encoding_flags;
3941         }
3942 #else
3943         if (f2fs_sb_has_casefold(sbi)) {
3944                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3945                 return -EINVAL;
3946         }
3947 #endif
3948         return 0;
3949 }
3950
3951 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3952 {
3953         struct f2fs_sm_info *sm_i = SM_I(sbi);
3954
3955         /* adjust parameters according to the volume size */
3956         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3957                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3958                 if (f2fs_block_unit_discard(sbi))
3959                         sm_i->dcc_info->discard_granularity = 1;
3960                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3961         }
3962
3963         sbi->readdir_ra = 1;
3964 }
3965
3966 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3967 {
3968         struct f2fs_sb_info *sbi;
3969         struct f2fs_super_block *raw_super;
3970         struct inode *root;
3971         int err;
3972         bool skip_recovery = false, need_fsck = false;
3973         char *options = NULL;
3974         int recovery, i, valid_super_block;
3975         struct curseg_info *seg_i;
3976         int retry_cnt = 1;
3977
3978 try_onemore:
3979         err = -EINVAL;
3980         raw_super = NULL;
3981         valid_super_block = -1;
3982         recovery = 0;
3983
3984         /* allocate memory for f2fs-specific super block info */
3985         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3986         if (!sbi)
3987                 return -ENOMEM;
3988
3989         sbi->sb = sb;
3990
3991         /* Load the checksum driver */
3992         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3993         if (IS_ERR(sbi->s_chksum_driver)) {
3994                 f2fs_err(sbi, "Cannot load crc32 driver.");
3995                 err = PTR_ERR(sbi->s_chksum_driver);
3996                 sbi->s_chksum_driver = NULL;
3997                 goto free_sbi;
3998         }
3999
4000         /* set a block size */
4001         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4002                 f2fs_err(sbi, "unable to set blocksize");
4003                 goto free_sbi;
4004         }
4005
4006         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4007                                                                 &recovery);
4008         if (err)
4009                 goto free_sbi;
4010
4011         sb->s_fs_info = sbi;
4012         sbi->raw_super = raw_super;
4013
4014         /* precompute checksum seed for metadata */
4015         if (f2fs_sb_has_inode_chksum(sbi))
4016                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4017                                                 sizeof(raw_super->uuid));
4018
4019         default_options(sbi);
4020         /* parse mount options */
4021         options = kstrdup((const char *)data, GFP_KERNEL);
4022         if (data && !options) {
4023                 err = -ENOMEM;
4024                 goto free_sb_buf;
4025         }
4026
4027         err = parse_options(sb, options, false);
4028         if (err)
4029                 goto free_options;
4030
4031         sb->s_maxbytes = max_file_blocks(NULL) <<
4032                                 le32_to_cpu(raw_super->log_blocksize);
4033         sb->s_max_links = F2FS_LINK_MAX;
4034
4035         err = f2fs_setup_casefold(sbi);
4036         if (err)
4037                 goto free_options;
4038
4039 #ifdef CONFIG_QUOTA
4040         sb->dq_op = &f2fs_quota_operations;
4041         sb->s_qcop = &f2fs_quotactl_ops;
4042         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4043
4044         if (f2fs_sb_has_quota_ino(sbi)) {
4045                 for (i = 0; i < MAXQUOTAS; i++) {
4046                         if (f2fs_qf_ino(sbi->sb, i))
4047                                 sbi->nquota_files++;
4048                 }
4049         }
4050 #endif
4051
4052         sb->s_op = &f2fs_sops;
4053 #ifdef CONFIG_FS_ENCRYPTION
4054         sb->s_cop = &f2fs_cryptops;
4055 #endif
4056 #ifdef CONFIG_FS_VERITY
4057         sb->s_vop = &f2fs_verityops;
4058 #endif
4059         sb->s_xattr = f2fs_xattr_handlers;
4060         sb->s_export_op = &f2fs_export_ops;
4061         sb->s_magic = F2FS_SUPER_MAGIC;
4062         sb->s_time_gran = 1;
4063         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4064                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4065         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4066         sb->s_iflags |= SB_I_CGROUPWB;
4067
4068         /* init f2fs-specific super block info */
4069         sbi->valid_super_block = valid_super_block;
4070         init_rwsem(&sbi->gc_lock);
4071         mutex_init(&sbi->writepages);
4072         init_rwsem(&sbi->cp_global_sem);
4073         init_rwsem(&sbi->node_write);
4074         init_rwsem(&sbi->node_change);
4075
4076         /* disallow all the data/node/meta page writes */
4077         set_sbi_flag(sbi, SBI_POR_DOING);
4078         spin_lock_init(&sbi->stat_lock);
4079
4080         for (i = 0; i < NR_PAGE_TYPE; i++) {
4081                 int n = (i == META) ? 1 : NR_TEMP_TYPE;
4082                 int j;
4083
4084                 sbi->write_io[i] =
4085                         f2fs_kmalloc(sbi,
4086                                      array_size(n,
4087                                                 sizeof(struct f2fs_bio_info)),
4088                                      GFP_KERNEL);
4089                 if (!sbi->write_io[i]) {
4090                         err = -ENOMEM;
4091                         goto free_bio_info;
4092                 }
4093
4094                 for (j = HOT; j < n; j++) {
4095                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
4096                         sbi->write_io[i][j].sbi = sbi;
4097                         sbi->write_io[i][j].bio = NULL;
4098                         spin_lock_init(&sbi->write_io[i][j].io_lock);
4099                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
4100                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
4101                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
4102                 }
4103         }
4104
4105         init_rwsem(&sbi->cp_rwsem);
4106         init_rwsem(&sbi->quota_sem);
4107         init_waitqueue_head(&sbi->cp_wait);
4108         init_sb_info(sbi);
4109
4110         err = f2fs_init_iostat(sbi);
4111         if (err)
4112                 goto free_bio_info;
4113
4114         err = init_percpu_info(sbi);
4115         if (err)
4116                 goto free_iostat;
4117
4118         if (F2FS_IO_ALIGNED(sbi)) {
4119                 sbi->write_io_dummy =
4120                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4121                 if (!sbi->write_io_dummy) {
4122                         err = -ENOMEM;
4123                         goto free_percpu;
4124                 }
4125         }
4126
4127         /* init per sbi slab cache */
4128         err = f2fs_init_xattr_caches(sbi);
4129         if (err)
4130                 goto free_io_dummy;
4131         err = f2fs_init_page_array_cache(sbi);
4132         if (err)
4133                 goto free_xattr_cache;
4134
4135         /* get an inode for meta space */
4136         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4137         if (IS_ERR(sbi->meta_inode)) {
4138                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4139                 err = PTR_ERR(sbi->meta_inode);
4140                 goto free_page_array_cache;
4141         }
4142
4143         err = f2fs_get_valid_checkpoint(sbi);
4144         if (err) {
4145                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4146                 goto free_meta_inode;
4147         }
4148
4149         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4150                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4151         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4152                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4153                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4154         }
4155
4156         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4157                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4158
4159         /* Initialize device list */
4160         err = f2fs_scan_devices(sbi);
4161         if (err) {
4162                 f2fs_err(sbi, "Failed to find devices");
4163                 goto free_devices;
4164         }
4165
4166         err = f2fs_init_post_read_wq(sbi);
4167         if (err) {
4168                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4169                 goto free_devices;
4170         }
4171
4172         sbi->total_valid_node_count =
4173                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4174         percpu_counter_set(&sbi->total_valid_inode_count,
4175                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4176         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4177         sbi->total_valid_block_count =
4178                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4179         sbi->last_valid_block_count = sbi->total_valid_block_count;
4180         sbi->reserved_blocks = 0;
4181         sbi->current_reserved_blocks = 0;
4182         limit_reserve_root(sbi);
4183         adjust_unusable_cap_perc(sbi);
4184
4185         for (i = 0; i < NR_INODE_TYPE; i++) {
4186                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4187                 spin_lock_init(&sbi->inode_lock[i]);
4188         }
4189         mutex_init(&sbi->flush_lock);
4190
4191         f2fs_init_extent_cache_info(sbi);
4192
4193         f2fs_init_ino_entry_info(sbi);
4194
4195         f2fs_init_fsync_node_info(sbi);
4196
4197         /* setup checkpoint request control and start checkpoint issue thread */
4198         f2fs_init_ckpt_req_control(sbi);
4199         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4200                         test_opt(sbi, MERGE_CHECKPOINT)) {
4201                 err = f2fs_start_ckpt_thread(sbi);
4202                 if (err) {
4203                         f2fs_err(sbi,
4204                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4205                             err);
4206                         goto stop_ckpt_thread;
4207                 }
4208         }
4209
4210         /* setup f2fs internal modules */
4211         err = f2fs_build_segment_manager(sbi);
4212         if (err) {
4213                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4214                          err);
4215                 goto free_sm;
4216         }
4217         err = f2fs_build_node_manager(sbi);
4218         if (err) {
4219                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4220                          err);
4221                 goto free_nm;
4222         }
4223
4224         err = adjust_reserved_segment(sbi);
4225         if (err)
4226                 goto free_nm;
4227
4228         /* For write statistics */
4229         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4230
4231         /* Read accumulated write IO statistics if exists */
4232         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4233         if (__exist_node_summaries(sbi))
4234                 sbi->kbytes_written =
4235                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4236
4237         f2fs_build_gc_manager(sbi);
4238
4239         err = f2fs_build_stats(sbi);
4240         if (err)
4241                 goto free_nm;
4242
4243         /* get an inode for node space */
4244         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4245         if (IS_ERR(sbi->node_inode)) {
4246                 f2fs_err(sbi, "Failed to read node inode");
4247                 err = PTR_ERR(sbi->node_inode);
4248                 goto free_stats;
4249         }
4250
4251         /* read root inode and dentry */
4252         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4253         if (IS_ERR(root)) {
4254                 f2fs_err(sbi, "Failed to read root inode");
4255                 err = PTR_ERR(root);
4256                 goto free_node_inode;
4257         }
4258         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4259                         !root->i_size || !root->i_nlink) {
4260                 iput(root);
4261                 err = -EINVAL;
4262                 goto free_node_inode;
4263         }
4264
4265         sb->s_root = d_make_root(root); /* allocate root dentry */
4266         if (!sb->s_root) {
4267                 err = -ENOMEM;
4268                 goto free_node_inode;
4269         }
4270
4271         err = f2fs_init_compress_inode(sbi);
4272         if (err)
4273                 goto free_root_inode;
4274
4275         err = f2fs_register_sysfs(sbi);
4276         if (err)
4277                 goto free_compress_inode;
4278
4279 #ifdef CONFIG_QUOTA
4280         /* Enable quota usage during mount */
4281         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4282                 err = f2fs_enable_quotas(sb);
4283                 if (err)
4284                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4285         }
4286 #endif
4287         /* if there are any orphan inodes, free them */
4288         err = f2fs_recover_orphan_inodes(sbi);
4289         if (err)
4290                 goto free_meta;
4291
4292         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4293                 goto reset_checkpoint;
4294
4295         /* recover fsynced data */
4296         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4297                         !test_opt(sbi, NORECOVERY)) {
4298                 /*
4299                  * mount should be failed, when device has readonly mode, and
4300                  * previous checkpoint was not done by clean system shutdown.
4301                  */
4302                 if (f2fs_hw_is_readonly(sbi)) {
4303                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4304                                 err = f2fs_recover_fsync_data(sbi, true);
4305                                 if (err > 0) {
4306                                         err = -EROFS;
4307                                         f2fs_err(sbi, "Need to recover fsync data, but "
4308                                                 "write access unavailable, please try "
4309                                                 "mount w/ disable_roll_forward or norecovery");
4310                                 }
4311                                 if (err < 0)
4312                                         goto free_meta;
4313                         }
4314                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4315                         goto reset_checkpoint;
4316                 }
4317
4318                 if (need_fsck)
4319                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4320
4321                 if (skip_recovery)
4322                         goto reset_checkpoint;
4323
4324                 err = f2fs_recover_fsync_data(sbi, false);
4325                 if (err < 0) {
4326                         if (err != -ENOMEM)
4327                                 skip_recovery = true;
4328                         need_fsck = true;
4329                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4330                                  err);
4331                         goto free_meta;
4332                 }
4333         } else {
4334                 err = f2fs_recover_fsync_data(sbi, true);
4335
4336                 if (!f2fs_readonly(sb) && err > 0) {
4337                         err = -EINVAL;
4338                         f2fs_err(sbi, "Need to recover fsync data");
4339                         goto free_meta;
4340                 }
4341         }
4342
4343         /*
4344          * If the f2fs is not readonly and fsync data recovery succeeds,
4345          * check zoned block devices' write pointer consistency.
4346          */
4347         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4348                 err = f2fs_check_write_pointer(sbi);
4349                 if (err)
4350                         goto free_meta;
4351         }
4352
4353 reset_checkpoint:
4354         f2fs_init_inmem_curseg(sbi);
4355
4356         /* f2fs_recover_fsync_data() cleared this already */
4357         clear_sbi_flag(sbi, SBI_POR_DOING);
4358
4359         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4360                 err = f2fs_disable_checkpoint(sbi);
4361                 if (err)
4362                         goto sync_free_meta;
4363         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4364                 f2fs_enable_checkpoint(sbi);
4365         }
4366
4367         /*
4368          * If filesystem is not mounted as read-only then
4369          * do start the gc_thread.
4370          */
4371         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4372                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4373                 /* After POR, we can run background GC thread.*/
4374                 err = f2fs_start_gc_thread(sbi);
4375                 if (err)
4376                         goto sync_free_meta;
4377         }
4378         kvfree(options);
4379
4380         /* recover broken superblock */
4381         if (recovery) {
4382                 err = f2fs_commit_super(sbi, true);
4383                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4384                           sbi->valid_super_block ? 1 : 2, err);
4385         }
4386
4387         f2fs_join_shrinker(sbi);
4388
4389         f2fs_tuning_parameters(sbi);
4390
4391         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4392                     cur_cp_version(F2FS_CKPT(sbi)));
4393         f2fs_update_time(sbi, CP_TIME);
4394         f2fs_update_time(sbi, REQ_TIME);
4395         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4396         return 0;
4397
4398 sync_free_meta:
4399         /* safe to flush all the data */
4400         sync_filesystem(sbi->sb);
4401         retry_cnt = 0;
4402
4403 free_meta:
4404 #ifdef CONFIG_QUOTA
4405         f2fs_truncate_quota_inode_pages(sb);
4406         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4407                 f2fs_quota_off_umount(sbi->sb);
4408 #endif
4409         /*
4410          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4411          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4412          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4413          * falls into an infinite loop in f2fs_sync_meta_pages().
4414          */
4415         truncate_inode_pages_final(META_MAPPING(sbi));
4416         /* evict some inodes being cached by GC */
4417         evict_inodes(sb);
4418         f2fs_unregister_sysfs(sbi);
4419 free_compress_inode:
4420         f2fs_destroy_compress_inode(sbi);
4421 free_root_inode:
4422         dput(sb->s_root);
4423         sb->s_root = NULL;
4424 free_node_inode:
4425         f2fs_release_ino_entry(sbi, true);
4426         truncate_inode_pages_final(NODE_MAPPING(sbi));
4427         iput(sbi->node_inode);
4428         sbi->node_inode = NULL;
4429 free_stats:
4430         f2fs_destroy_stats(sbi);
4431 free_nm:
4432         /* stop discard thread before destroying node manager */
4433         f2fs_stop_discard_thread(sbi);
4434         f2fs_destroy_node_manager(sbi);
4435 free_sm:
4436         f2fs_destroy_segment_manager(sbi);
4437         f2fs_destroy_post_read_wq(sbi);
4438 stop_ckpt_thread:
4439         f2fs_stop_ckpt_thread(sbi);
4440 free_devices:
4441         destroy_device_list(sbi);
4442         kvfree(sbi->ckpt);
4443 free_meta_inode:
4444         make_bad_inode(sbi->meta_inode);
4445         iput(sbi->meta_inode);
4446         sbi->meta_inode = NULL;
4447 free_page_array_cache:
4448         f2fs_destroy_page_array_cache(sbi);
4449 free_xattr_cache:
4450         f2fs_destroy_xattr_caches(sbi);
4451 free_io_dummy:
4452         mempool_destroy(sbi->write_io_dummy);
4453 free_percpu:
4454         destroy_percpu_info(sbi);
4455 free_iostat:
4456         f2fs_destroy_iostat(sbi);
4457 free_bio_info:
4458         for (i = 0; i < NR_PAGE_TYPE; i++)
4459                 kvfree(sbi->write_io[i]);
4460
4461 #if IS_ENABLED(CONFIG_UNICODE)
4462         utf8_unload(sb->s_encoding);
4463         sb->s_encoding = NULL;
4464 #endif
4465 free_options:
4466 #ifdef CONFIG_QUOTA
4467         for (i = 0; i < MAXQUOTAS; i++)
4468                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4469 #endif
4470         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4471         kvfree(options);
4472 free_sb_buf:
4473         kfree(raw_super);
4474 free_sbi:
4475         if (sbi->s_chksum_driver)
4476                 crypto_free_shash(sbi->s_chksum_driver);
4477         kfree(sbi);
4478
4479         /* give only one another chance */
4480         if (retry_cnt > 0 && skip_recovery) {
4481                 retry_cnt--;
4482                 shrink_dcache_sb(sb);
4483                 goto try_onemore;
4484         }
4485         return err;
4486 }
4487
4488 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4489                         const char *dev_name, void *data)
4490 {
4491         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4492 }
4493
4494 static void kill_f2fs_super(struct super_block *sb)
4495 {
4496         if (sb->s_root) {
4497                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4498
4499                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4500                 f2fs_stop_gc_thread(sbi);
4501                 f2fs_stop_discard_thread(sbi);
4502
4503 #ifdef CONFIG_F2FS_FS_COMPRESSION
4504                 /*
4505                  * latter evict_inode() can bypass checking and invalidating
4506                  * compress inode cache.
4507                  */
4508                 if (test_opt(sbi, COMPRESS_CACHE))
4509                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4510 #endif
4511
4512                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4513                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4514                         struct cp_control cpc = {
4515                                 .reason = CP_UMOUNT,
4516                         };
4517                         f2fs_write_checkpoint(sbi, &cpc);
4518                 }
4519
4520                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4521                         sb->s_flags &= ~SB_RDONLY;
4522         }
4523         kill_block_super(sb);
4524 }
4525
4526 static struct file_system_type f2fs_fs_type = {
4527         .owner          = THIS_MODULE,
4528         .name           = "f2fs",
4529         .mount          = f2fs_mount,
4530         .kill_sb        = kill_f2fs_super,
4531         .fs_flags       = FS_REQUIRES_DEV,
4532 };
4533 MODULE_ALIAS_FS("f2fs");
4534
4535 static int __init init_inodecache(void)
4536 {
4537         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4538                         sizeof(struct f2fs_inode_info), 0,
4539                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4540         if (!f2fs_inode_cachep)
4541                 return -ENOMEM;
4542         return 0;
4543 }
4544
4545 static void destroy_inodecache(void)
4546 {
4547         /*
4548          * Make sure all delayed rcu free inodes are flushed before we
4549          * destroy cache.
4550          */
4551         rcu_barrier();
4552         kmem_cache_destroy(f2fs_inode_cachep);
4553 }
4554
4555 static int __init init_f2fs_fs(void)
4556 {
4557         int err;
4558
4559         if (PAGE_SIZE != F2FS_BLKSIZE) {
4560                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4561                                 PAGE_SIZE, F2FS_BLKSIZE);
4562                 return -EINVAL;
4563         }
4564
4565         err = init_inodecache();
4566         if (err)
4567                 goto fail;
4568         err = f2fs_create_node_manager_caches();
4569         if (err)
4570                 goto free_inodecache;
4571         err = f2fs_create_segment_manager_caches();
4572         if (err)
4573                 goto free_node_manager_caches;
4574         err = f2fs_create_checkpoint_caches();
4575         if (err)
4576                 goto free_segment_manager_caches;
4577         err = f2fs_create_recovery_cache();
4578         if (err)
4579                 goto free_checkpoint_caches;
4580         err = f2fs_create_extent_cache();
4581         if (err)
4582                 goto free_recovery_cache;
4583         err = f2fs_create_garbage_collection_cache();
4584         if (err)
4585                 goto free_extent_cache;
4586         err = f2fs_init_sysfs();
4587         if (err)
4588                 goto free_garbage_collection_cache;
4589         err = register_shrinker(&f2fs_shrinker_info);
4590         if (err)
4591                 goto free_sysfs;
4592         err = register_filesystem(&f2fs_fs_type);
4593         if (err)
4594                 goto free_shrinker;
4595         f2fs_create_root_stats();
4596         err = f2fs_init_post_read_processing();
4597         if (err)
4598                 goto free_root_stats;
4599         err = f2fs_init_iostat_processing();
4600         if (err)
4601                 goto free_post_read;
4602         err = f2fs_init_bio_entry_cache();
4603         if (err)
4604                 goto free_iostat;
4605         err = f2fs_init_bioset();
4606         if (err)
4607                 goto free_bio_enrty_cache;
4608         err = f2fs_init_compress_mempool();
4609         if (err)
4610                 goto free_bioset;
4611         err = f2fs_init_compress_cache();
4612         if (err)
4613                 goto free_compress_mempool;
4614         err = f2fs_create_casefold_cache();
4615         if (err)
4616                 goto free_compress_cache;
4617         return 0;
4618 free_compress_cache:
4619         f2fs_destroy_compress_cache();
4620 free_compress_mempool:
4621         f2fs_destroy_compress_mempool();
4622 free_bioset:
4623         f2fs_destroy_bioset();
4624 free_bio_enrty_cache:
4625         f2fs_destroy_bio_entry_cache();
4626 free_iostat:
4627         f2fs_destroy_iostat_processing();
4628 free_post_read:
4629         f2fs_destroy_post_read_processing();
4630 free_root_stats:
4631         f2fs_destroy_root_stats();
4632         unregister_filesystem(&f2fs_fs_type);
4633 free_shrinker:
4634         unregister_shrinker(&f2fs_shrinker_info);
4635 free_sysfs:
4636         f2fs_exit_sysfs();
4637 free_garbage_collection_cache:
4638         f2fs_destroy_garbage_collection_cache();
4639 free_extent_cache:
4640         f2fs_destroy_extent_cache();
4641 free_recovery_cache:
4642         f2fs_destroy_recovery_cache();
4643 free_checkpoint_caches:
4644         f2fs_destroy_checkpoint_caches();
4645 free_segment_manager_caches:
4646         f2fs_destroy_segment_manager_caches();
4647 free_node_manager_caches:
4648         f2fs_destroy_node_manager_caches();
4649 free_inodecache:
4650         destroy_inodecache();
4651 fail:
4652         return err;
4653 }
4654
4655 static void __exit exit_f2fs_fs(void)
4656 {
4657         f2fs_destroy_casefold_cache();
4658         f2fs_destroy_compress_cache();
4659         f2fs_destroy_compress_mempool();
4660         f2fs_destroy_bioset();
4661         f2fs_destroy_bio_entry_cache();
4662         f2fs_destroy_iostat_processing();
4663         f2fs_destroy_post_read_processing();
4664         f2fs_destroy_root_stats();
4665         unregister_filesystem(&f2fs_fs_type);
4666         unregister_shrinker(&f2fs_shrinker_info);
4667         f2fs_exit_sysfs();
4668         f2fs_destroy_garbage_collection_cache();
4669         f2fs_destroy_extent_cache();
4670         f2fs_destroy_recovery_cache();
4671         f2fs_destroy_checkpoint_caches();
4672         f2fs_destroy_segment_manager_caches();
4673         f2fs_destroy_node_manager_caches();
4674         destroy_inodecache();
4675 }
4676
4677 module_init(init_f2fs_fs)
4678 module_exit(exit_f2fs_fs)
4679
4680 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4681 MODULE_DESCRIPTION("Flash Friendly File System");
4682 MODULE_LICENSE("GPL");
4683 MODULE_SOFTDEP("pre: crc32");
4684