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_f2fs_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_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1366         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1367         init_f2fs_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->total_valid_inode_count);
1505         percpu_counter_destroy(&sbi->rf_node_block_count);
1506         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1507 }
1508
1509 static void destroy_device_list(struct f2fs_sb_info *sbi)
1510 {
1511         int i;
1512
1513         for (i = 0; i < sbi->s_ndevs; i++) {
1514                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1515 #ifdef CONFIG_BLK_DEV_ZONED
1516                 kvfree(FDEV(i).blkz_seq);
1517                 kfree(FDEV(i).zone_capacity_blocks);
1518 #endif
1519         }
1520         kvfree(sbi->devs);
1521 }
1522
1523 static void f2fs_put_super(struct super_block *sb)
1524 {
1525         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1526         int i;
1527         bool dropped;
1528
1529         /* unregister procfs/sysfs entries in advance to avoid race case */
1530         f2fs_unregister_sysfs(sbi);
1531
1532         f2fs_quota_off_umount(sb);
1533
1534         /* prevent remaining shrinker jobs */
1535         mutex_lock(&sbi->umount_mutex);
1536
1537         /*
1538          * flush all issued checkpoints and stop checkpoint issue thread.
1539          * after then, all checkpoints should be done by each process context.
1540          */
1541         f2fs_stop_ckpt_thread(sbi);
1542
1543         /*
1544          * We don't need to do checkpoint when superblock is clean.
1545          * But, the previous checkpoint was not done by umount, it needs to do
1546          * clean checkpoint again.
1547          */
1548         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1549                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1550                 struct cp_control cpc = {
1551                         .reason = CP_UMOUNT,
1552                 };
1553                 f2fs_write_checkpoint(sbi, &cpc);
1554         }
1555
1556         /* be sure to wait for any on-going discard commands */
1557         dropped = f2fs_issue_discard_timeout(sbi);
1558
1559         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1560                                         !sbi->discard_blks && !dropped) {
1561                 struct cp_control cpc = {
1562                         .reason = CP_UMOUNT | CP_TRIMMED,
1563                 };
1564                 f2fs_write_checkpoint(sbi, &cpc);
1565         }
1566
1567         /*
1568          * normally superblock is clean, so we need to release this.
1569          * In addition, EIO will skip do checkpoint, we need this as well.
1570          */
1571         f2fs_release_ino_entry(sbi, true);
1572
1573         f2fs_leave_shrinker(sbi);
1574         mutex_unlock(&sbi->umount_mutex);
1575
1576         /* our cp_error case, we can wait for any writeback page */
1577         f2fs_flush_merged_writes(sbi);
1578
1579         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1580
1581         f2fs_bug_on(sbi, sbi->fsync_node_num);
1582
1583         f2fs_destroy_compress_inode(sbi);
1584
1585         iput(sbi->node_inode);
1586         sbi->node_inode = NULL;
1587
1588         iput(sbi->meta_inode);
1589         sbi->meta_inode = NULL;
1590
1591         /*
1592          * iput() can update stat information, if f2fs_write_checkpoint()
1593          * above failed with error.
1594          */
1595         f2fs_destroy_stats(sbi);
1596
1597         /* destroy f2fs internal modules */
1598         f2fs_destroy_node_manager(sbi);
1599         f2fs_destroy_segment_manager(sbi);
1600
1601         f2fs_destroy_post_read_wq(sbi);
1602
1603         kvfree(sbi->ckpt);
1604
1605         sb->s_fs_info = NULL;
1606         if (sbi->s_chksum_driver)
1607                 crypto_free_shash(sbi->s_chksum_driver);
1608         kfree(sbi->raw_super);
1609
1610         destroy_device_list(sbi);
1611         f2fs_destroy_page_array_cache(sbi);
1612         f2fs_destroy_xattr_caches(sbi);
1613         mempool_destroy(sbi->write_io_dummy);
1614 #ifdef CONFIG_QUOTA
1615         for (i = 0; i < MAXQUOTAS; i++)
1616                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1617 #endif
1618         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1619         destroy_percpu_info(sbi);
1620         f2fs_destroy_iostat(sbi);
1621         for (i = 0; i < NR_PAGE_TYPE; i++)
1622                 kvfree(sbi->write_io[i]);
1623 #if IS_ENABLED(CONFIG_UNICODE)
1624         utf8_unload(sb->s_encoding);
1625 #endif
1626         kfree(sbi);
1627 }
1628
1629 int f2fs_sync_fs(struct super_block *sb, int sync)
1630 {
1631         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1632         int err = 0;
1633
1634         if (unlikely(f2fs_cp_error(sbi)))
1635                 return 0;
1636         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1637                 return 0;
1638
1639         trace_f2fs_sync_fs(sb, sync);
1640
1641         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1642                 return -EAGAIN;
1643
1644         if (sync)
1645                 err = f2fs_issue_checkpoint(sbi);
1646
1647         return err;
1648 }
1649
1650 static int f2fs_freeze(struct super_block *sb)
1651 {
1652         if (f2fs_readonly(sb))
1653                 return 0;
1654
1655         /* IO error happened before */
1656         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1657                 return -EIO;
1658
1659         /* must be clean, since sync_filesystem() was already called */
1660         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1661                 return -EINVAL;
1662
1663         /* ensure no checkpoint required */
1664         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1665                 return -EINVAL;
1666
1667         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1668         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1669         return 0;
1670 }
1671
1672 static int f2fs_unfreeze(struct super_block *sb)
1673 {
1674         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1675         return 0;
1676 }
1677
1678 #ifdef CONFIG_QUOTA
1679 static int f2fs_statfs_project(struct super_block *sb,
1680                                 kprojid_t projid, struct kstatfs *buf)
1681 {
1682         struct kqid qid;
1683         struct dquot *dquot;
1684         u64 limit;
1685         u64 curblock;
1686
1687         qid = make_kqid_projid(projid);
1688         dquot = dqget(sb, qid);
1689         if (IS_ERR(dquot))
1690                 return PTR_ERR(dquot);
1691         spin_lock(&dquot->dq_dqb_lock);
1692
1693         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1694                                         dquot->dq_dqb.dqb_bhardlimit);
1695         if (limit)
1696                 limit >>= sb->s_blocksize_bits;
1697
1698         if (limit && buf->f_blocks > limit) {
1699                 curblock = (dquot->dq_dqb.dqb_curspace +
1700                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1701                 buf->f_blocks = limit;
1702                 buf->f_bfree = buf->f_bavail =
1703                         (buf->f_blocks > curblock) ?
1704                          (buf->f_blocks - curblock) : 0;
1705         }
1706
1707         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1708                                         dquot->dq_dqb.dqb_ihardlimit);
1709
1710         if (limit && buf->f_files > limit) {
1711                 buf->f_files = limit;
1712                 buf->f_ffree =
1713                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1714                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1715         }
1716
1717         spin_unlock(&dquot->dq_dqb_lock);
1718         dqput(dquot);
1719         return 0;
1720 }
1721 #endif
1722
1723 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1724 {
1725         struct super_block *sb = dentry->d_sb;
1726         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1727         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1728         block_t total_count, user_block_count, start_count;
1729         u64 avail_node_count;
1730
1731         total_count = le64_to_cpu(sbi->raw_super->block_count);
1732         user_block_count = sbi->user_block_count;
1733         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1734         buf->f_type = F2FS_SUPER_MAGIC;
1735         buf->f_bsize = sbi->blocksize;
1736
1737         buf->f_blocks = total_count - start_count;
1738         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1739                                                 sbi->current_reserved_blocks;
1740
1741         spin_lock(&sbi->stat_lock);
1742         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1743                 buf->f_bfree = 0;
1744         else
1745                 buf->f_bfree -= sbi->unusable_block_count;
1746         spin_unlock(&sbi->stat_lock);
1747
1748         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1749                 buf->f_bavail = buf->f_bfree -
1750                                 F2FS_OPTION(sbi).root_reserved_blocks;
1751         else
1752                 buf->f_bavail = 0;
1753
1754         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1755
1756         if (avail_node_count > user_block_count) {
1757                 buf->f_files = user_block_count;
1758                 buf->f_ffree = buf->f_bavail;
1759         } else {
1760                 buf->f_files = avail_node_count;
1761                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1762                                         buf->f_bavail);
1763         }
1764
1765         buf->f_namelen = F2FS_NAME_LEN;
1766         buf->f_fsid    = u64_to_fsid(id);
1767
1768 #ifdef CONFIG_QUOTA
1769         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1770                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1771                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1772         }
1773 #endif
1774         return 0;
1775 }
1776
1777 static inline void f2fs_show_quota_options(struct seq_file *seq,
1778                                            struct super_block *sb)
1779 {
1780 #ifdef CONFIG_QUOTA
1781         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1782
1783         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1784                 char *fmtname = "";
1785
1786                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1787                 case QFMT_VFS_OLD:
1788                         fmtname = "vfsold";
1789                         break;
1790                 case QFMT_VFS_V0:
1791                         fmtname = "vfsv0";
1792                         break;
1793                 case QFMT_VFS_V1:
1794                         fmtname = "vfsv1";
1795                         break;
1796                 }
1797                 seq_printf(seq, ",jqfmt=%s", fmtname);
1798         }
1799
1800         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1801                 seq_show_option(seq, "usrjquota",
1802                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1803
1804         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1805                 seq_show_option(seq, "grpjquota",
1806                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1807
1808         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1809                 seq_show_option(seq, "prjjquota",
1810                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1811 #endif
1812 }
1813
1814 #ifdef CONFIG_F2FS_FS_COMPRESSION
1815 static inline void f2fs_show_compress_options(struct seq_file *seq,
1816                                                         struct super_block *sb)
1817 {
1818         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1819         char *algtype = "";
1820         int i;
1821
1822         if (!f2fs_sb_has_compression(sbi))
1823                 return;
1824
1825         switch (F2FS_OPTION(sbi).compress_algorithm) {
1826         case COMPRESS_LZO:
1827                 algtype = "lzo";
1828                 break;
1829         case COMPRESS_LZ4:
1830                 algtype = "lz4";
1831                 break;
1832         case COMPRESS_ZSTD:
1833                 algtype = "zstd";
1834                 break;
1835         case COMPRESS_LZORLE:
1836                 algtype = "lzo-rle";
1837                 break;
1838         }
1839         seq_printf(seq, ",compress_algorithm=%s", algtype);
1840
1841         if (F2FS_OPTION(sbi).compress_level)
1842                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1843
1844         seq_printf(seq, ",compress_log_size=%u",
1845                         F2FS_OPTION(sbi).compress_log_size);
1846
1847         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1848                 seq_printf(seq, ",compress_extension=%s",
1849                         F2FS_OPTION(sbi).extensions[i]);
1850         }
1851
1852         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1853                 seq_printf(seq, ",nocompress_extension=%s",
1854                         F2FS_OPTION(sbi).noextensions[i]);
1855         }
1856
1857         if (F2FS_OPTION(sbi).compress_chksum)
1858                 seq_puts(seq, ",compress_chksum");
1859
1860         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1861                 seq_printf(seq, ",compress_mode=%s", "fs");
1862         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1863                 seq_printf(seq, ",compress_mode=%s", "user");
1864
1865         if (test_opt(sbi, COMPRESS_CACHE))
1866                 seq_puts(seq, ",compress_cache");
1867 }
1868 #endif
1869
1870 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1871 {
1872         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1873
1874         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1875                 seq_printf(seq, ",background_gc=%s", "sync");
1876         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1877                 seq_printf(seq, ",background_gc=%s", "on");
1878         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1879                 seq_printf(seq, ",background_gc=%s", "off");
1880
1881         if (test_opt(sbi, GC_MERGE))
1882                 seq_puts(seq, ",gc_merge");
1883
1884         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1885                 seq_puts(seq, ",disable_roll_forward");
1886         if (test_opt(sbi, NORECOVERY))
1887                 seq_puts(seq, ",norecovery");
1888         if (test_opt(sbi, DISCARD))
1889                 seq_puts(seq, ",discard");
1890         else
1891                 seq_puts(seq, ",nodiscard");
1892         if (test_opt(sbi, NOHEAP))
1893                 seq_puts(seq, ",no_heap");
1894         else
1895                 seq_puts(seq, ",heap");
1896 #ifdef CONFIG_F2FS_FS_XATTR
1897         if (test_opt(sbi, XATTR_USER))
1898                 seq_puts(seq, ",user_xattr");
1899         else
1900                 seq_puts(seq, ",nouser_xattr");
1901         if (test_opt(sbi, INLINE_XATTR))
1902                 seq_puts(seq, ",inline_xattr");
1903         else
1904                 seq_puts(seq, ",noinline_xattr");
1905         if (test_opt(sbi, INLINE_XATTR_SIZE))
1906                 seq_printf(seq, ",inline_xattr_size=%u",
1907                                         F2FS_OPTION(sbi).inline_xattr_size);
1908 #endif
1909 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1910         if (test_opt(sbi, POSIX_ACL))
1911                 seq_puts(seq, ",acl");
1912         else
1913                 seq_puts(seq, ",noacl");
1914 #endif
1915         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1916                 seq_puts(seq, ",disable_ext_identify");
1917         if (test_opt(sbi, INLINE_DATA))
1918                 seq_puts(seq, ",inline_data");
1919         else
1920                 seq_puts(seq, ",noinline_data");
1921         if (test_opt(sbi, INLINE_DENTRY))
1922                 seq_puts(seq, ",inline_dentry");
1923         else
1924                 seq_puts(seq, ",noinline_dentry");
1925         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1926                 seq_puts(seq, ",flush_merge");
1927         if (test_opt(sbi, NOBARRIER))
1928                 seq_puts(seq, ",nobarrier");
1929         if (test_opt(sbi, FASTBOOT))
1930                 seq_puts(seq, ",fastboot");
1931         if (test_opt(sbi, EXTENT_CACHE))
1932                 seq_puts(seq, ",extent_cache");
1933         else
1934                 seq_puts(seq, ",noextent_cache");
1935         if (test_opt(sbi, DATA_FLUSH))
1936                 seq_puts(seq, ",data_flush");
1937
1938         seq_puts(seq, ",mode=");
1939         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1940                 seq_puts(seq, "adaptive");
1941         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1942                 seq_puts(seq, "lfs");
1943         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
1944                 seq_puts(seq, "fragment:segment");
1945         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
1946                 seq_puts(seq, "fragment:block");
1947         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1948         if (test_opt(sbi, RESERVE_ROOT))
1949                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1950                                 F2FS_OPTION(sbi).root_reserved_blocks,
1951                                 from_kuid_munged(&init_user_ns,
1952                                         F2FS_OPTION(sbi).s_resuid),
1953                                 from_kgid_munged(&init_user_ns,
1954                                         F2FS_OPTION(sbi).s_resgid));
1955         if (F2FS_IO_SIZE_BITS(sbi))
1956                 seq_printf(seq, ",io_bits=%u",
1957                                 F2FS_OPTION(sbi).write_io_size_bits);
1958 #ifdef CONFIG_F2FS_FAULT_INJECTION
1959         if (test_opt(sbi, FAULT_INJECTION)) {
1960                 seq_printf(seq, ",fault_injection=%u",
1961                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1962                 seq_printf(seq, ",fault_type=%u",
1963                                 F2FS_OPTION(sbi).fault_info.inject_type);
1964         }
1965 #endif
1966 #ifdef CONFIG_QUOTA
1967         if (test_opt(sbi, QUOTA))
1968                 seq_puts(seq, ",quota");
1969         if (test_opt(sbi, USRQUOTA))
1970                 seq_puts(seq, ",usrquota");
1971         if (test_opt(sbi, GRPQUOTA))
1972                 seq_puts(seq, ",grpquota");
1973         if (test_opt(sbi, PRJQUOTA))
1974                 seq_puts(seq, ",prjquota");
1975 #endif
1976         f2fs_show_quota_options(seq, sbi->sb);
1977         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1978                 seq_printf(seq, ",whint_mode=%s", "user-based");
1979         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1980                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1981
1982         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1983
1984         if (sbi->sb->s_flags & SB_INLINECRYPT)
1985                 seq_puts(seq, ",inlinecrypt");
1986
1987         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1988                 seq_printf(seq, ",alloc_mode=%s", "default");
1989         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1990                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1991
1992         if (test_opt(sbi, DISABLE_CHECKPOINT))
1993                 seq_printf(seq, ",checkpoint=disable:%u",
1994                                 F2FS_OPTION(sbi).unusable_cap);
1995         if (test_opt(sbi, MERGE_CHECKPOINT))
1996                 seq_puts(seq, ",checkpoint_merge");
1997         else
1998                 seq_puts(seq, ",nocheckpoint_merge");
1999         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2000                 seq_printf(seq, ",fsync_mode=%s", "posix");
2001         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2002                 seq_printf(seq, ",fsync_mode=%s", "strict");
2003         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2004                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2005
2006 #ifdef CONFIG_F2FS_FS_COMPRESSION
2007         f2fs_show_compress_options(seq, sbi->sb);
2008 #endif
2009
2010         if (test_opt(sbi, ATGC))
2011                 seq_puts(seq, ",atgc");
2012
2013         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2014                 seq_printf(seq, ",discard_unit=%s", "block");
2015         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2016                 seq_printf(seq, ",discard_unit=%s", "segment");
2017         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2018                 seq_printf(seq, ",discard_unit=%s", "section");
2019
2020         return 0;
2021 }
2022
2023 static void default_options(struct f2fs_sb_info *sbi)
2024 {
2025         /* init some FS parameters */
2026         if (f2fs_sb_has_readonly(sbi))
2027                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2028         else
2029                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2030
2031         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2032         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
2033         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2034         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2035         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2036         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2037         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2038         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2039         F2FS_OPTION(sbi).compress_ext_cnt = 0;
2040         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2041         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2042
2043         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2044
2045         set_opt(sbi, INLINE_XATTR);
2046         set_opt(sbi, INLINE_DATA);
2047         set_opt(sbi, INLINE_DENTRY);
2048         set_opt(sbi, EXTENT_CACHE);
2049         set_opt(sbi, NOHEAP);
2050         clear_opt(sbi, DISABLE_CHECKPOINT);
2051         set_opt(sbi, MERGE_CHECKPOINT);
2052         F2FS_OPTION(sbi).unusable_cap = 0;
2053         sbi->sb->s_flags |= SB_LAZYTIME;
2054         set_opt(sbi, FLUSH_MERGE);
2055         if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2056                 set_opt(sbi, DISCARD);
2057         if (f2fs_sb_has_blkzoned(sbi)) {
2058                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2059                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2060         } else {
2061                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2062                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2063         }
2064
2065 #ifdef CONFIG_F2FS_FS_XATTR
2066         set_opt(sbi, XATTR_USER);
2067 #endif
2068 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2069         set_opt(sbi, POSIX_ACL);
2070 #endif
2071
2072         f2fs_build_fault_attr(sbi, 0, 0);
2073 }
2074
2075 #ifdef CONFIG_QUOTA
2076 static int f2fs_enable_quotas(struct super_block *sb);
2077 #endif
2078
2079 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2080 {
2081         unsigned int s_flags = sbi->sb->s_flags;
2082         struct cp_control cpc;
2083         unsigned int gc_mode;
2084         int err = 0;
2085         int ret;
2086         block_t unusable;
2087
2088         if (s_flags & SB_RDONLY) {
2089                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2090                 return -EINVAL;
2091         }
2092         sbi->sb->s_flags |= SB_ACTIVE;
2093
2094         f2fs_update_time(sbi, DISABLE_TIME);
2095
2096         gc_mode = sbi->gc_mode;
2097         sbi->gc_mode = GC_URGENT_HIGH;
2098
2099         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2100                 f2fs_down_write(&sbi->gc_lock);
2101                 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
2102                 if (err == -ENODATA) {
2103                         err = 0;
2104                         break;
2105                 }
2106                 if (err && err != -EAGAIN)
2107                         break;
2108         }
2109
2110         ret = sync_filesystem(sbi->sb);
2111         if (ret || err) {
2112                 err = ret ? ret : err;
2113                 goto restore_flag;
2114         }
2115
2116         unusable = f2fs_get_unusable_blocks(sbi);
2117         if (f2fs_disable_cp_again(sbi, unusable)) {
2118                 err = -EAGAIN;
2119                 goto restore_flag;
2120         }
2121
2122         f2fs_down_write(&sbi->gc_lock);
2123         cpc.reason = CP_PAUSE;
2124         set_sbi_flag(sbi, SBI_CP_DISABLED);
2125         err = f2fs_write_checkpoint(sbi, &cpc);
2126         if (err)
2127                 goto out_unlock;
2128
2129         spin_lock(&sbi->stat_lock);
2130         sbi->unusable_block_count = unusable;
2131         spin_unlock(&sbi->stat_lock);
2132
2133 out_unlock:
2134         f2fs_up_write(&sbi->gc_lock);
2135 restore_flag:
2136         sbi->gc_mode = gc_mode;
2137         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2138         return err;
2139 }
2140
2141 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2142 {
2143         int retry = DEFAULT_RETRY_IO_COUNT;
2144
2145         /* we should flush all the data to keep data consistency */
2146         do {
2147                 sync_inodes_sb(sbi->sb);
2148                 cond_resched();
2149                 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
2150         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2151
2152         if (unlikely(retry < 0))
2153                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2154
2155         f2fs_down_write(&sbi->gc_lock);
2156         f2fs_dirty_to_prefree(sbi);
2157
2158         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2159         set_sbi_flag(sbi, SBI_IS_DIRTY);
2160         f2fs_up_write(&sbi->gc_lock);
2161
2162         f2fs_sync_fs(sbi->sb, 1);
2163 }
2164
2165 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2166 {
2167         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2168         struct f2fs_mount_info org_mount_opt;
2169         unsigned long old_sb_flags;
2170         int err;
2171         bool need_restart_gc = false, need_stop_gc = false;
2172         bool need_restart_ckpt = false, need_stop_ckpt = false;
2173         bool need_restart_flush = false, need_stop_flush = false;
2174         bool need_restart_discard = false, need_stop_discard = false;
2175         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2176         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2177         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2178         bool no_atgc = !test_opt(sbi, ATGC);
2179         bool no_discard = !test_opt(sbi, DISCARD);
2180         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2181         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2182         struct discard_cmd_control *dcc;
2183 #ifdef CONFIG_QUOTA
2184         int i, j;
2185 #endif
2186
2187         /*
2188          * Save the old mount options in case we
2189          * need to restore them.
2190          */
2191         org_mount_opt = sbi->mount_opt;
2192         old_sb_flags = sb->s_flags;
2193
2194 #ifdef CONFIG_QUOTA
2195         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2196         for (i = 0; i < MAXQUOTAS; i++) {
2197                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2198                         org_mount_opt.s_qf_names[i] =
2199                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2200                                 GFP_KERNEL);
2201                         if (!org_mount_opt.s_qf_names[i]) {
2202                                 for (j = 0; j < i; j++)
2203                                         kfree(org_mount_opt.s_qf_names[j]);
2204                                 return -ENOMEM;
2205                         }
2206                 } else {
2207                         org_mount_opt.s_qf_names[i] = NULL;
2208                 }
2209         }
2210 #endif
2211
2212         /* recover superblocks we couldn't write due to previous RO mount */
2213         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2214                 err = f2fs_commit_super(sbi, false);
2215                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2216                           err);
2217                 if (!err)
2218                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2219         }
2220
2221         default_options(sbi);
2222
2223         /* parse mount options */
2224         err = parse_options(sb, data, true);
2225         if (err)
2226                 goto restore_opts;
2227
2228         /*
2229          * Previous and new state of filesystem is RO,
2230          * so skip checking GC and FLUSH_MERGE conditions.
2231          */
2232         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2233                 goto skip;
2234
2235         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2236                 err = -EROFS;
2237                 goto restore_opts;
2238         }
2239
2240 #ifdef CONFIG_QUOTA
2241         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2242                 err = dquot_suspend(sb, -1);
2243                 if (err < 0)
2244                         goto restore_opts;
2245         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2246                 /* dquot_resume needs RW */
2247                 sb->s_flags &= ~SB_RDONLY;
2248                 if (sb_any_quota_suspended(sb)) {
2249                         dquot_resume(sb, -1);
2250                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2251                         err = f2fs_enable_quotas(sb);
2252                         if (err)
2253                                 goto restore_opts;
2254                 }
2255         }
2256 #endif
2257         /* disallow enable atgc dynamically */
2258         if (no_atgc == !!test_opt(sbi, ATGC)) {
2259                 err = -EINVAL;
2260                 f2fs_warn(sbi, "switch atgc option is not allowed");
2261                 goto restore_opts;
2262         }
2263
2264         /* disallow enable/disable extent_cache dynamically */
2265         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2266                 err = -EINVAL;
2267                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2268                 goto restore_opts;
2269         }
2270
2271         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2272                 err = -EINVAL;
2273                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2274                 goto restore_opts;
2275         }
2276
2277         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2278                 err = -EINVAL;
2279                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2280                 goto restore_opts;
2281         }
2282
2283         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2284                 err = -EINVAL;
2285                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2286                 goto restore_opts;
2287         }
2288
2289         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2290                 err = -EINVAL;
2291                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2292                 goto restore_opts;
2293         }
2294
2295         /*
2296          * We stop the GC thread if FS is mounted as RO
2297          * or if background_gc = off is passed in mount
2298          * option. Also sync the filesystem.
2299          */
2300         if ((*flags & SB_RDONLY) ||
2301                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2302                         !test_opt(sbi, GC_MERGE))) {
2303                 if (sbi->gc_thread) {
2304                         f2fs_stop_gc_thread(sbi);
2305                         need_restart_gc = true;
2306                 }
2307         } else if (!sbi->gc_thread) {
2308                 err = f2fs_start_gc_thread(sbi);
2309                 if (err)
2310                         goto restore_opts;
2311                 need_stop_gc = true;
2312         }
2313
2314         if (*flags & SB_RDONLY ||
2315                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
2316                 sync_inodes_sb(sb);
2317
2318                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2319                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2320                 f2fs_sync_fs(sb, 1);
2321                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2322         }
2323
2324         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2325                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2326                 f2fs_stop_ckpt_thread(sbi);
2327                 need_restart_ckpt = true;
2328         } else {
2329                 err = f2fs_start_ckpt_thread(sbi);
2330                 if (err) {
2331                         f2fs_err(sbi,
2332                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2333                             err);
2334                         goto restore_gc;
2335                 }
2336                 need_stop_ckpt = true;
2337         }
2338
2339         /*
2340          * We stop issue flush thread if FS is mounted as RO
2341          * or if flush_merge is not passed in mount option.
2342          */
2343         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2344                 clear_opt(sbi, FLUSH_MERGE);
2345                 f2fs_destroy_flush_cmd_control(sbi, false);
2346                 need_restart_flush = true;
2347         } else {
2348                 err = f2fs_create_flush_cmd_control(sbi);
2349                 if (err)
2350                         goto restore_ckpt;
2351                 need_stop_flush = true;
2352         }
2353
2354         if (no_discard == !!test_opt(sbi, DISCARD)) {
2355                 if (test_opt(sbi, DISCARD)) {
2356                         err = f2fs_start_discard_thread(sbi);
2357                         if (err)
2358                                 goto restore_flush;
2359                         need_stop_discard = true;
2360                 } else {
2361                         dcc = SM_I(sbi)->dcc_info;
2362                         f2fs_stop_discard_thread(sbi);
2363                         if (atomic_read(&dcc->discard_cmd_cnt))
2364                                 f2fs_issue_discard_timeout(sbi);
2365                         need_restart_discard = true;
2366                 }
2367         }
2368
2369         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2370                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2371                         err = f2fs_disable_checkpoint(sbi);
2372                         if (err)
2373                                 goto restore_discard;
2374                 } else {
2375                         f2fs_enable_checkpoint(sbi);
2376                 }
2377         }
2378
2379 skip:
2380 #ifdef CONFIG_QUOTA
2381         /* Release old quota file names */
2382         for (i = 0; i < MAXQUOTAS; i++)
2383                 kfree(org_mount_opt.s_qf_names[i]);
2384 #endif
2385         /* Update the POSIXACL Flag */
2386         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2387                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2388
2389         limit_reserve_root(sbi);
2390         adjust_unusable_cap_perc(sbi);
2391         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2392         return 0;
2393 restore_discard:
2394         if (need_restart_discard) {
2395                 if (f2fs_start_discard_thread(sbi))
2396                         f2fs_warn(sbi, "discard has been stopped");
2397         } else if (need_stop_discard) {
2398                 f2fs_stop_discard_thread(sbi);
2399         }
2400 restore_flush:
2401         if (need_restart_flush) {
2402                 if (f2fs_create_flush_cmd_control(sbi))
2403                         f2fs_warn(sbi, "background flush thread has stopped");
2404         } else if (need_stop_flush) {
2405                 clear_opt(sbi, FLUSH_MERGE);
2406                 f2fs_destroy_flush_cmd_control(sbi, false);
2407         }
2408 restore_ckpt:
2409         if (need_restart_ckpt) {
2410                 if (f2fs_start_ckpt_thread(sbi))
2411                         f2fs_warn(sbi, "background ckpt thread has stopped");
2412         } else if (need_stop_ckpt) {
2413                 f2fs_stop_ckpt_thread(sbi);
2414         }
2415 restore_gc:
2416         if (need_restart_gc) {
2417                 if (f2fs_start_gc_thread(sbi))
2418                         f2fs_warn(sbi, "background gc thread has stopped");
2419         } else if (need_stop_gc) {
2420                 f2fs_stop_gc_thread(sbi);
2421         }
2422 restore_opts:
2423 #ifdef CONFIG_QUOTA
2424         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2425         for (i = 0; i < MAXQUOTAS; i++) {
2426                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2427                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2428         }
2429 #endif
2430         sbi->mount_opt = org_mount_opt;
2431         sb->s_flags = old_sb_flags;
2432         return err;
2433 }
2434
2435 #ifdef CONFIG_QUOTA
2436 /* Read data from quotafile */
2437 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2438                                size_t len, loff_t off)
2439 {
2440         struct inode *inode = sb_dqopt(sb)->files[type];
2441         struct address_space *mapping = inode->i_mapping;
2442         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2443         int offset = off & (sb->s_blocksize - 1);
2444         int tocopy;
2445         size_t toread;
2446         loff_t i_size = i_size_read(inode);
2447         struct page *page;
2448         char *kaddr;
2449
2450         if (off > i_size)
2451                 return 0;
2452
2453         if (off + len > i_size)
2454                 len = i_size - off;
2455         toread = len;
2456         while (toread > 0) {
2457                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2458 repeat:
2459                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2460                 if (IS_ERR(page)) {
2461                         if (PTR_ERR(page) == -ENOMEM) {
2462                                 memalloc_retry_wait(GFP_NOFS);
2463                                 goto repeat;
2464                         }
2465                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2466                         return PTR_ERR(page);
2467                 }
2468
2469                 lock_page(page);
2470
2471                 if (unlikely(page->mapping != mapping)) {
2472                         f2fs_put_page(page, 1);
2473                         goto repeat;
2474                 }
2475                 if (unlikely(!PageUptodate(page))) {
2476                         f2fs_put_page(page, 1);
2477                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2478                         return -EIO;
2479                 }
2480
2481                 kaddr = kmap_atomic(page);
2482                 memcpy(data, kaddr + offset, tocopy);
2483                 kunmap_atomic(kaddr);
2484                 f2fs_put_page(page, 1);
2485
2486                 offset = 0;
2487                 toread -= tocopy;
2488                 data += tocopy;
2489                 blkidx++;
2490         }
2491         return len;
2492 }
2493
2494 /* Write to quotafile */
2495 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2496                                 const char *data, size_t len, loff_t off)
2497 {
2498         struct inode *inode = sb_dqopt(sb)->files[type];
2499         struct address_space *mapping = inode->i_mapping;
2500         const struct address_space_operations *a_ops = mapping->a_ops;
2501         int offset = off & (sb->s_blocksize - 1);
2502         size_t towrite = len;
2503         struct page *page;
2504         void *fsdata = NULL;
2505         char *kaddr;
2506         int err = 0;
2507         int tocopy;
2508
2509         while (towrite > 0) {
2510                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2511                                                                 towrite);
2512 retry:
2513                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2514                                                         &page, &fsdata);
2515                 if (unlikely(err)) {
2516                         if (err == -ENOMEM) {
2517                                 congestion_wait(BLK_RW_ASYNC,
2518                                                 DEFAULT_IO_TIMEOUT);
2519                                 goto retry;
2520                         }
2521                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2522                         break;
2523                 }
2524
2525                 kaddr = kmap_atomic(page);
2526                 memcpy(kaddr + offset, data, tocopy);
2527                 kunmap_atomic(kaddr);
2528                 flush_dcache_page(page);
2529
2530                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2531                                                 page, fsdata);
2532                 offset = 0;
2533                 towrite -= tocopy;
2534                 off += tocopy;
2535                 data += tocopy;
2536                 cond_resched();
2537         }
2538
2539         if (len == towrite)
2540                 return err;
2541         inode->i_mtime = inode->i_ctime = current_time(inode);
2542         f2fs_mark_inode_dirty_sync(inode, false);
2543         return len - towrite;
2544 }
2545
2546 int f2fs_dquot_initialize(struct inode *inode)
2547 {
2548         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2549                 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2550                 return -ESRCH;
2551         }
2552
2553         return dquot_initialize(inode);
2554 }
2555
2556 static struct dquot **f2fs_get_dquots(struct inode *inode)
2557 {
2558         return F2FS_I(inode)->i_dquot;
2559 }
2560
2561 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2562 {
2563         return &F2FS_I(inode)->i_reserved_quota;
2564 }
2565
2566 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2567 {
2568         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2569                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2570                 return 0;
2571         }
2572
2573         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2574                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2575 }
2576
2577 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2578 {
2579         int enabled = 0;
2580         int i, err;
2581
2582         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2583                 err = f2fs_enable_quotas(sbi->sb);
2584                 if (err) {
2585                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2586                         return 0;
2587                 }
2588                 return 1;
2589         }
2590
2591         for (i = 0; i < MAXQUOTAS; i++) {
2592                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2593                         err = f2fs_quota_on_mount(sbi, i);
2594                         if (!err) {
2595                                 enabled = 1;
2596                                 continue;
2597                         }
2598                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2599                                  err, i);
2600                 }
2601         }
2602         return enabled;
2603 }
2604
2605 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2606                              unsigned int flags)
2607 {
2608         struct inode *qf_inode;
2609         unsigned long qf_inum;
2610         int err;
2611
2612         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2613
2614         qf_inum = f2fs_qf_ino(sb, type);
2615         if (!qf_inum)
2616                 return -EPERM;
2617
2618         qf_inode = f2fs_iget(sb, qf_inum);
2619         if (IS_ERR(qf_inode)) {
2620                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2621                 return PTR_ERR(qf_inode);
2622         }
2623
2624         /* Don't account quota for quota files to avoid recursion */
2625         qf_inode->i_flags |= S_NOQUOTA;
2626         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2627         iput(qf_inode);
2628         return err;
2629 }
2630
2631 static int f2fs_enable_quotas(struct super_block *sb)
2632 {
2633         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2634         int type, err = 0;
2635         unsigned long qf_inum;
2636         bool quota_mopt[MAXQUOTAS] = {
2637                 test_opt(sbi, USRQUOTA),
2638                 test_opt(sbi, GRPQUOTA),
2639                 test_opt(sbi, PRJQUOTA),
2640         };
2641
2642         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2643                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2644                 return 0;
2645         }
2646
2647         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2648
2649         for (type = 0; type < MAXQUOTAS; type++) {
2650                 qf_inum = f2fs_qf_ino(sb, type);
2651                 if (qf_inum) {
2652                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2653                                 DQUOT_USAGE_ENABLED |
2654                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2655                         if (err) {
2656                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2657                                          type, err);
2658                                 for (type--; type >= 0; type--)
2659                                         dquot_quota_off(sb, type);
2660                                 set_sbi_flag(F2FS_SB(sb),
2661                                                 SBI_QUOTA_NEED_REPAIR);
2662                                 return err;
2663                         }
2664                 }
2665         }
2666         return 0;
2667 }
2668
2669 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2670 {
2671         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2672         struct address_space *mapping = dqopt->files[type]->i_mapping;
2673         int ret = 0;
2674
2675         ret = dquot_writeback_dquots(sbi->sb, type);
2676         if (ret)
2677                 goto out;
2678
2679         ret = filemap_fdatawrite(mapping);
2680         if (ret)
2681                 goto out;
2682
2683         /* if we are using journalled quota */
2684         if (is_journalled_quota(sbi))
2685                 goto out;
2686
2687         ret = filemap_fdatawait(mapping);
2688
2689         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2690 out:
2691         if (ret)
2692                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2693         return ret;
2694 }
2695
2696 int f2fs_quota_sync(struct super_block *sb, int type)
2697 {
2698         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2699         struct quota_info *dqopt = sb_dqopt(sb);
2700         int cnt;
2701         int ret = 0;
2702
2703         /*
2704          * Now when everything is written we can discard the pagecache so
2705          * that userspace sees the changes.
2706          */
2707         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2708
2709                 if (type != -1 && cnt != type)
2710                         continue;
2711
2712                 if (!sb_has_quota_active(sb, cnt))
2713                         continue;
2714
2715                 inode_lock(dqopt->files[cnt]);
2716
2717                 /*
2718                  * do_quotactl
2719                  *  f2fs_quota_sync
2720                  *  f2fs_down_read(quota_sem)
2721                  *  dquot_writeback_dquots()
2722                  *  f2fs_dquot_commit
2723                  *                            block_operation
2724                  *                            f2fs_down_read(quota_sem)
2725                  */
2726                 f2fs_lock_op(sbi);
2727                 f2fs_down_read(&sbi->quota_sem);
2728
2729                 ret = f2fs_quota_sync_file(sbi, cnt);
2730
2731                 f2fs_up_read(&sbi->quota_sem);
2732                 f2fs_unlock_op(sbi);
2733
2734                 inode_unlock(dqopt->files[cnt]);
2735
2736                 if (ret)
2737                         break;
2738         }
2739         return ret;
2740 }
2741
2742 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2743                                                         const struct path *path)
2744 {
2745         struct inode *inode;
2746         int err;
2747
2748         /* if quota sysfile exists, deny enabling quota with specific file */
2749         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2750                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2751                 return -EBUSY;
2752         }
2753
2754         err = f2fs_quota_sync(sb, type);
2755         if (err)
2756                 return err;
2757
2758         err = dquot_quota_on(sb, type, format_id, path);
2759         if (err)
2760                 return err;
2761
2762         inode = d_inode(path->dentry);
2763
2764         inode_lock(inode);
2765         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2766         f2fs_set_inode_flags(inode);
2767         inode_unlock(inode);
2768         f2fs_mark_inode_dirty_sync(inode, false);
2769
2770         return 0;
2771 }
2772
2773 static int __f2fs_quota_off(struct super_block *sb, int type)
2774 {
2775         struct inode *inode = sb_dqopt(sb)->files[type];
2776         int err;
2777
2778         if (!inode || !igrab(inode))
2779                 return dquot_quota_off(sb, type);
2780
2781         err = f2fs_quota_sync(sb, type);
2782         if (err)
2783                 goto out_put;
2784
2785         err = dquot_quota_off(sb, type);
2786         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2787                 goto out_put;
2788
2789         inode_lock(inode);
2790         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2791         f2fs_set_inode_flags(inode);
2792         inode_unlock(inode);
2793         f2fs_mark_inode_dirty_sync(inode, false);
2794 out_put:
2795         iput(inode);
2796         return err;
2797 }
2798
2799 static int f2fs_quota_off(struct super_block *sb, int type)
2800 {
2801         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2802         int err;
2803
2804         err = __f2fs_quota_off(sb, type);
2805
2806         /*
2807          * quotactl can shutdown journalled quota, result in inconsistence
2808          * between quota record and fs data by following updates, tag the
2809          * flag to let fsck be aware of it.
2810          */
2811         if (is_journalled_quota(sbi))
2812                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2813         return err;
2814 }
2815
2816 void f2fs_quota_off_umount(struct super_block *sb)
2817 {
2818         int type;
2819         int err;
2820
2821         for (type = 0; type < MAXQUOTAS; type++) {
2822                 err = __f2fs_quota_off(sb, type);
2823                 if (err) {
2824                         int ret = dquot_quota_off(sb, type);
2825
2826                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2827                                  type, err, ret);
2828                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2829                 }
2830         }
2831         /*
2832          * In case of checkpoint=disable, we must flush quota blocks.
2833          * This can cause NULL exception for node_inode in end_io, since
2834          * put_super already dropped it.
2835          */
2836         sync_filesystem(sb);
2837 }
2838
2839 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2840 {
2841         struct quota_info *dqopt = sb_dqopt(sb);
2842         int type;
2843
2844         for (type = 0; type < MAXQUOTAS; type++) {
2845                 if (!dqopt->files[type])
2846                         continue;
2847                 f2fs_inode_synced(dqopt->files[type]);
2848         }
2849 }
2850
2851 static int f2fs_dquot_commit(struct dquot *dquot)
2852 {
2853         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2854         int ret;
2855
2856         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2857         ret = dquot_commit(dquot);
2858         if (ret < 0)
2859                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2860         f2fs_up_read(&sbi->quota_sem);
2861         return ret;
2862 }
2863
2864 static int f2fs_dquot_acquire(struct dquot *dquot)
2865 {
2866         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2867         int ret;
2868
2869         f2fs_down_read(&sbi->quota_sem);
2870         ret = dquot_acquire(dquot);
2871         if (ret < 0)
2872                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2873         f2fs_up_read(&sbi->quota_sem);
2874         return ret;
2875 }
2876
2877 static int f2fs_dquot_release(struct dquot *dquot)
2878 {
2879         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2880         int ret = dquot_release(dquot);
2881
2882         if (ret < 0)
2883                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2884         return ret;
2885 }
2886
2887 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2888 {
2889         struct super_block *sb = dquot->dq_sb;
2890         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2891         int ret = dquot_mark_dquot_dirty(dquot);
2892
2893         /* if we are using journalled quota */
2894         if (is_journalled_quota(sbi))
2895                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2896
2897         return ret;
2898 }
2899
2900 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2901 {
2902         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2903         int ret = dquot_commit_info(sb, type);
2904
2905         if (ret < 0)
2906                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2907         return ret;
2908 }
2909
2910 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2911 {
2912         *projid = F2FS_I(inode)->i_projid;
2913         return 0;
2914 }
2915
2916 static const struct dquot_operations f2fs_quota_operations = {
2917         .get_reserved_space = f2fs_get_reserved_space,
2918         .write_dquot    = f2fs_dquot_commit,
2919         .acquire_dquot  = f2fs_dquot_acquire,
2920         .release_dquot  = f2fs_dquot_release,
2921         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2922         .write_info     = f2fs_dquot_commit_info,
2923         .alloc_dquot    = dquot_alloc,
2924         .destroy_dquot  = dquot_destroy,
2925         .get_projid     = f2fs_get_projid,
2926         .get_next_id    = dquot_get_next_id,
2927 };
2928
2929 static const struct quotactl_ops f2fs_quotactl_ops = {
2930         .quota_on       = f2fs_quota_on,
2931         .quota_off      = f2fs_quota_off,
2932         .quota_sync     = f2fs_quota_sync,
2933         .get_state      = dquot_get_state,
2934         .set_info       = dquot_set_dqinfo,
2935         .get_dqblk      = dquot_get_dqblk,
2936         .set_dqblk      = dquot_set_dqblk,
2937         .get_nextdqblk  = dquot_get_next_dqblk,
2938 };
2939 #else
2940 int f2fs_dquot_initialize(struct inode *inode)
2941 {
2942         return 0;
2943 }
2944
2945 int f2fs_quota_sync(struct super_block *sb, int type)
2946 {
2947         return 0;
2948 }
2949
2950 void f2fs_quota_off_umount(struct super_block *sb)
2951 {
2952 }
2953 #endif
2954
2955 static const struct super_operations f2fs_sops = {
2956         .alloc_inode    = f2fs_alloc_inode,
2957         .free_inode     = f2fs_free_inode,
2958         .drop_inode     = f2fs_drop_inode,
2959         .write_inode    = f2fs_write_inode,
2960         .dirty_inode    = f2fs_dirty_inode,
2961         .show_options   = f2fs_show_options,
2962 #ifdef CONFIG_QUOTA
2963         .quota_read     = f2fs_quota_read,
2964         .quota_write    = f2fs_quota_write,
2965         .get_dquots     = f2fs_get_dquots,
2966 #endif
2967         .evict_inode    = f2fs_evict_inode,
2968         .put_super      = f2fs_put_super,
2969         .sync_fs        = f2fs_sync_fs,
2970         .freeze_fs      = f2fs_freeze,
2971         .unfreeze_fs    = f2fs_unfreeze,
2972         .statfs         = f2fs_statfs,
2973         .remount_fs     = f2fs_remount,
2974 };
2975
2976 #ifdef CONFIG_FS_ENCRYPTION
2977 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2978 {
2979         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2980                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2981                                 ctx, len, NULL);
2982 }
2983
2984 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2985                                                         void *fs_data)
2986 {
2987         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2988
2989         /*
2990          * Encrypting the root directory is not allowed because fsck
2991          * expects lost+found directory to exist and remain unencrypted
2992          * if LOST_FOUND feature is enabled.
2993          *
2994          */
2995         if (f2fs_sb_has_lost_found(sbi) &&
2996                         inode->i_ino == F2FS_ROOT_INO(sbi))
2997                 return -EPERM;
2998
2999         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3000                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3001                                 ctx, len, fs_data, XATTR_CREATE);
3002 }
3003
3004 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3005 {
3006         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3007 }
3008
3009 static bool f2fs_has_stable_inodes(struct super_block *sb)
3010 {
3011         return true;
3012 }
3013
3014 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3015                                        int *ino_bits_ret, int *lblk_bits_ret)
3016 {
3017         *ino_bits_ret = 8 * sizeof(nid_t);
3018         *lblk_bits_ret = 8 * sizeof(block_t);
3019 }
3020
3021 static int f2fs_get_num_devices(struct super_block *sb)
3022 {
3023         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3024
3025         if (f2fs_is_multi_device(sbi))
3026                 return sbi->s_ndevs;
3027         return 1;
3028 }
3029
3030 static void f2fs_get_devices(struct super_block *sb,
3031                              struct request_queue **devs)
3032 {
3033         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3034         int i;
3035
3036         for (i = 0; i < sbi->s_ndevs; i++)
3037                 devs[i] = bdev_get_queue(FDEV(i).bdev);
3038 }
3039
3040 static const struct fscrypt_operations f2fs_cryptops = {
3041         .key_prefix             = "f2fs:",
3042         .get_context            = f2fs_get_context,
3043         .set_context            = f2fs_set_context,
3044         .get_dummy_policy       = f2fs_get_dummy_policy,
3045         .empty_dir              = f2fs_empty_dir,
3046         .has_stable_inodes      = f2fs_has_stable_inodes,
3047         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3048         .get_num_devices        = f2fs_get_num_devices,
3049         .get_devices            = f2fs_get_devices,
3050 };
3051 #endif
3052
3053 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3054                 u64 ino, u32 generation)
3055 {
3056         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3057         struct inode *inode;
3058
3059         if (f2fs_check_nid_range(sbi, ino))
3060                 return ERR_PTR(-ESTALE);
3061
3062         /*
3063          * f2fs_iget isn't quite right if the inode is currently unallocated!
3064          * However f2fs_iget currently does appropriate checks to handle stale
3065          * inodes so everything is OK.
3066          */
3067         inode = f2fs_iget(sb, ino);
3068         if (IS_ERR(inode))
3069                 return ERR_CAST(inode);
3070         if (unlikely(generation && inode->i_generation != generation)) {
3071                 /* we didn't find the right inode.. */
3072                 iput(inode);
3073                 return ERR_PTR(-ESTALE);
3074         }
3075         return inode;
3076 }
3077
3078 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3079                 int fh_len, int fh_type)
3080 {
3081         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3082                                     f2fs_nfs_get_inode);
3083 }
3084
3085 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3086                 int fh_len, int fh_type)
3087 {
3088         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3089                                     f2fs_nfs_get_inode);
3090 }
3091
3092 static const struct export_operations f2fs_export_ops = {
3093         .fh_to_dentry = f2fs_fh_to_dentry,
3094         .fh_to_parent = f2fs_fh_to_parent,
3095         .get_parent = f2fs_get_parent,
3096 };
3097
3098 loff_t max_file_blocks(struct inode *inode)
3099 {
3100         loff_t result = 0;
3101         loff_t leaf_count;
3102
3103         /*
3104          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3105          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3106          * space in inode.i_addr, it will be more safe to reassign
3107          * result as zero.
3108          */
3109
3110         if (inode && f2fs_compressed_file(inode))
3111                 leaf_count = ADDRS_PER_BLOCK(inode);
3112         else
3113                 leaf_count = DEF_ADDRS_PER_BLOCK;
3114
3115         /* two direct node blocks */
3116         result += (leaf_count * 2);
3117
3118         /* two indirect node blocks */
3119         leaf_count *= NIDS_PER_BLOCK;
3120         result += (leaf_count * 2);
3121
3122         /* one double indirect node block */
3123         leaf_count *= NIDS_PER_BLOCK;
3124         result += leaf_count;
3125
3126         return result;
3127 }
3128
3129 static int __f2fs_commit_super(struct buffer_head *bh,
3130                         struct f2fs_super_block *super)
3131 {
3132         lock_buffer(bh);
3133         if (super)
3134                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3135         set_buffer_dirty(bh);
3136         unlock_buffer(bh);
3137
3138         /* it's rare case, we can do fua all the time */
3139         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3140 }
3141
3142 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3143                                         struct buffer_head *bh)
3144 {
3145         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3146                                         (bh->b_data + F2FS_SUPER_OFFSET);
3147         struct super_block *sb = sbi->sb;
3148         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3149         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3150         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3151         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3152         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3153         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3154         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3155         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3156         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3157         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3158         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3159         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3160         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3161         u64 main_end_blkaddr = main_blkaddr +
3162                                 (segment_count_main << log_blocks_per_seg);
3163         u64 seg_end_blkaddr = segment0_blkaddr +
3164                                 (segment_count << log_blocks_per_seg);
3165
3166         if (segment0_blkaddr != cp_blkaddr) {
3167                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3168                           segment0_blkaddr, cp_blkaddr);
3169                 return true;
3170         }
3171
3172         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3173                                                         sit_blkaddr) {
3174                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3175                           cp_blkaddr, sit_blkaddr,
3176                           segment_count_ckpt << log_blocks_per_seg);
3177                 return true;
3178         }
3179
3180         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3181                                                         nat_blkaddr) {
3182                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3183                           sit_blkaddr, nat_blkaddr,
3184                           segment_count_sit << log_blocks_per_seg);
3185                 return true;
3186         }
3187
3188         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3189                                                         ssa_blkaddr) {
3190                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3191                           nat_blkaddr, ssa_blkaddr,
3192                           segment_count_nat << log_blocks_per_seg);
3193                 return true;
3194         }
3195
3196         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3197                                                         main_blkaddr) {
3198                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3199                           ssa_blkaddr, main_blkaddr,
3200                           segment_count_ssa << log_blocks_per_seg);
3201                 return true;
3202         }
3203
3204         if (main_end_blkaddr > seg_end_blkaddr) {
3205                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3206                           main_blkaddr, seg_end_blkaddr,
3207                           segment_count_main << log_blocks_per_seg);
3208                 return true;
3209         } else if (main_end_blkaddr < seg_end_blkaddr) {
3210                 int err = 0;
3211                 char *res;
3212
3213                 /* fix in-memory information all the time */
3214                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3215                                 segment0_blkaddr) >> log_blocks_per_seg);
3216
3217                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3218                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3219                         res = "internally";
3220                 } else {
3221                         err = __f2fs_commit_super(bh, NULL);
3222                         res = err ? "failed" : "done";
3223                 }
3224                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3225                           res, main_blkaddr, seg_end_blkaddr,
3226                           segment_count_main << log_blocks_per_seg);
3227                 if (err)
3228                         return true;
3229         }
3230         return false;
3231 }
3232
3233 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3234                                 struct buffer_head *bh)
3235 {
3236         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3237         block_t total_sections, blocks_per_seg;
3238         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3239                                         (bh->b_data + F2FS_SUPER_OFFSET);
3240         size_t crc_offset = 0;
3241         __u32 crc = 0;
3242
3243         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3244                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3245                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3246                 return -EINVAL;
3247         }
3248
3249         /* Check checksum_offset and crc in superblock */
3250         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3251                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3252                 if (crc_offset !=
3253                         offsetof(struct f2fs_super_block, crc)) {
3254                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3255                                   crc_offset);
3256                         return -EFSCORRUPTED;
3257                 }
3258                 crc = le32_to_cpu(raw_super->crc);
3259                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3260                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3261                         return -EFSCORRUPTED;
3262                 }
3263         }
3264
3265         /* Currently, support only 4KB block size */
3266         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3267                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3268                           le32_to_cpu(raw_super->log_blocksize),
3269                           F2FS_BLKSIZE_BITS);
3270                 return -EFSCORRUPTED;
3271         }
3272
3273         /* check log blocks per segment */
3274         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3275                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3276                           le32_to_cpu(raw_super->log_blocks_per_seg));
3277                 return -EFSCORRUPTED;
3278         }
3279
3280         /* Currently, support 512/1024/2048/4096 bytes sector size */
3281         if (le32_to_cpu(raw_super->log_sectorsize) >
3282                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3283                 le32_to_cpu(raw_super->log_sectorsize) <
3284                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3285                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3286                           le32_to_cpu(raw_super->log_sectorsize));
3287                 return -EFSCORRUPTED;
3288         }
3289         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3290                 le32_to_cpu(raw_super->log_sectorsize) !=
3291                         F2FS_MAX_LOG_SECTOR_SIZE) {
3292                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3293                           le32_to_cpu(raw_super->log_sectors_per_block),
3294                           le32_to_cpu(raw_super->log_sectorsize));
3295                 return -EFSCORRUPTED;
3296         }
3297
3298         segment_count = le32_to_cpu(raw_super->segment_count);
3299         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3300         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3301         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3302         total_sections = le32_to_cpu(raw_super->section_count);
3303
3304         /* blocks_per_seg should be 512, given the above check */
3305         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3306
3307         if (segment_count > F2FS_MAX_SEGMENT ||
3308                                 segment_count < F2FS_MIN_SEGMENTS) {
3309                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3310                 return -EFSCORRUPTED;
3311         }
3312
3313         if (total_sections > segment_count_main || total_sections < 1 ||
3314                         segs_per_sec > segment_count || !segs_per_sec) {
3315                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3316                           segment_count, total_sections, segs_per_sec);
3317                 return -EFSCORRUPTED;
3318         }
3319
3320         if (segment_count_main != total_sections * segs_per_sec) {
3321                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3322                           segment_count_main, total_sections, segs_per_sec);
3323                 return -EFSCORRUPTED;
3324         }
3325
3326         if ((segment_count / segs_per_sec) < total_sections) {
3327                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3328                           segment_count, segs_per_sec, total_sections);
3329                 return -EFSCORRUPTED;
3330         }
3331
3332         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3333                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3334                           segment_count, le64_to_cpu(raw_super->block_count));
3335                 return -EFSCORRUPTED;
3336         }
3337
3338         if (RDEV(0).path[0]) {
3339                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3340                 int i = 1;
3341
3342                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3343                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3344                         i++;
3345                 }
3346                 if (segment_count != dev_seg_count) {
3347                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3348                                         segment_count, dev_seg_count);
3349                         return -EFSCORRUPTED;
3350                 }
3351         } else {
3352                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3353                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3354                         f2fs_info(sbi, "Zoned block device path is missing");
3355                         return -EFSCORRUPTED;
3356                 }
3357         }
3358
3359         if (secs_per_zone > total_sections || !secs_per_zone) {
3360                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3361                           secs_per_zone, total_sections);
3362                 return -EFSCORRUPTED;
3363         }
3364         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3365                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3366                         (le32_to_cpu(raw_super->extension_count) +
3367                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3368                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3369                           le32_to_cpu(raw_super->extension_count),
3370                           raw_super->hot_ext_count,
3371                           F2FS_MAX_EXTENSION);
3372                 return -EFSCORRUPTED;
3373         }
3374
3375         if (le32_to_cpu(raw_super->cp_payload) >=
3376                                 (blocks_per_seg - F2FS_CP_PACKS -
3377                                 NR_CURSEG_PERSIST_TYPE)) {
3378                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3379                           le32_to_cpu(raw_super->cp_payload),
3380                           blocks_per_seg - F2FS_CP_PACKS -
3381                           NR_CURSEG_PERSIST_TYPE);
3382                 return -EFSCORRUPTED;
3383         }
3384
3385         /* check reserved ino info */
3386         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3387                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3388                 le32_to_cpu(raw_super->root_ino) != 3) {
3389                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3390                           le32_to_cpu(raw_super->node_ino),
3391                           le32_to_cpu(raw_super->meta_ino),
3392                           le32_to_cpu(raw_super->root_ino));
3393                 return -EFSCORRUPTED;
3394         }
3395
3396         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3397         if (sanity_check_area_boundary(sbi, bh))
3398                 return -EFSCORRUPTED;
3399
3400         return 0;
3401 }
3402
3403 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3404 {
3405         unsigned int total, fsmeta;
3406         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3407         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3408         unsigned int ovp_segments, reserved_segments;
3409         unsigned int main_segs, blocks_per_seg;
3410         unsigned int sit_segs, nat_segs;
3411         unsigned int sit_bitmap_size, nat_bitmap_size;
3412         unsigned int log_blocks_per_seg;
3413         unsigned int segment_count_main;
3414         unsigned int cp_pack_start_sum, cp_payload;
3415         block_t user_block_count, valid_user_blocks;
3416         block_t avail_node_count, valid_node_count;
3417         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3418         int i, j;
3419
3420         total = le32_to_cpu(raw_super->segment_count);
3421         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3422         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3423         fsmeta += sit_segs;
3424         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3425         fsmeta += nat_segs;
3426         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3427         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3428
3429         if (unlikely(fsmeta >= total))
3430                 return 1;
3431
3432         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3433         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3434
3435         if (!f2fs_sb_has_readonly(sbi) &&
3436                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3437                         ovp_segments == 0 || reserved_segments == 0)) {
3438                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3439                 return 1;
3440         }
3441         user_block_count = le64_to_cpu(ckpt->user_block_count);
3442         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3443                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3444         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3445         if (!user_block_count || user_block_count >=
3446                         segment_count_main << log_blocks_per_seg) {
3447                 f2fs_err(sbi, "Wrong user_block_count: %u",
3448                          user_block_count);
3449                 return 1;
3450         }
3451
3452         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3453         if (valid_user_blocks > user_block_count) {
3454                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3455                          valid_user_blocks, user_block_count);
3456                 return 1;
3457         }
3458
3459         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3460         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3461         if (valid_node_count > avail_node_count) {
3462                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3463                          valid_node_count, avail_node_count);
3464                 return 1;
3465         }
3466
3467         main_segs = le32_to_cpu(raw_super->segment_count_main);
3468         blocks_per_seg = sbi->blocks_per_seg;
3469
3470         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3471                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3472                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3473                         return 1;
3474
3475                 if (f2fs_sb_has_readonly(sbi))
3476                         goto check_data;
3477
3478                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3479                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3480                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3481                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3482                                          i, j,
3483                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3484                                 return 1;
3485                         }
3486                 }
3487         }
3488 check_data:
3489         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3490                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3491                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3492                         return 1;
3493
3494                 if (f2fs_sb_has_readonly(sbi))
3495                         goto skip_cross;
3496
3497                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3498                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3499                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3500                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3501                                          i, j,
3502                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3503                                 return 1;
3504                         }
3505                 }
3506         }
3507         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3508                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3509                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3510                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3511                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3512                                          i, j,
3513                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3514                                 return 1;
3515                         }
3516                 }
3517         }
3518 skip_cross:
3519         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3520         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3521
3522         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3523                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3524                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3525                          sit_bitmap_size, nat_bitmap_size);
3526                 return 1;
3527         }
3528
3529         cp_pack_start_sum = __start_sum_addr(sbi);
3530         cp_payload = __cp_payload(sbi);
3531         if (cp_pack_start_sum < cp_payload + 1 ||
3532                 cp_pack_start_sum > blocks_per_seg - 1 -
3533                         NR_CURSEG_PERSIST_TYPE) {
3534                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3535                          cp_pack_start_sum);
3536                 return 1;
3537         }
3538
3539         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3540                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3541                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3542                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3543                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3544                           le32_to_cpu(ckpt->checksum_offset));
3545                 return 1;
3546         }
3547
3548         nat_blocks = nat_segs << log_blocks_per_seg;
3549         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3550         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3551         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3552                 (cp_payload + F2FS_CP_PACKS +
3553                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3554                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3555                           cp_payload, nat_bits_blocks);
3556                 return 1;
3557         }
3558
3559         if (unlikely(f2fs_cp_error(sbi))) {
3560                 f2fs_err(sbi, "A bug case: need to run fsck");
3561                 return 1;
3562         }
3563         return 0;
3564 }
3565
3566 static void init_sb_info(struct f2fs_sb_info *sbi)
3567 {
3568         struct f2fs_super_block *raw_super = sbi->raw_super;
3569         int i;
3570
3571         sbi->log_sectors_per_block =
3572                 le32_to_cpu(raw_super->log_sectors_per_block);
3573         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3574         sbi->blocksize = 1 << sbi->log_blocksize;
3575         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3576         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3577         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3578         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3579         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3580         sbi->total_node_count =
3581                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3582                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3583         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3584         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3585         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3586         sbi->cur_victim_sec = NULL_SECNO;
3587         sbi->gc_mode = GC_NORMAL;
3588         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3589         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3590         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3591         sbi->migration_granularity = sbi->segs_per_sec;
3592         sbi->seq_file_ra_mul = MIN_RA_MUL;
3593         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3594         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3595         spin_lock_init(&sbi->gc_urgent_high_lock);
3596
3597         sbi->dir_level = DEF_DIR_LEVEL;
3598         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3599         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3600         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3601         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3602         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3603         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3604                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3605         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3606
3607         for (i = 0; i < NR_COUNT_TYPE; i++)
3608                 atomic_set(&sbi->nr_pages[i], 0);
3609
3610         for (i = 0; i < META; i++)
3611                 atomic_set(&sbi->wb_sync_req[i], 0);
3612
3613         INIT_LIST_HEAD(&sbi->s_list);
3614         mutex_init(&sbi->umount_mutex);
3615         init_f2fs_rwsem(&sbi->io_order_lock);
3616         spin_lock_init(&sbi->cp_lock);
3617
3618         sbi->dirty_device = 0;
3619         spin_lock_init(&sbi->dev_lock);
3620
3621         init_f2fs_rwsem(&sbi->sb_lock);
3622         init_f2fs_rwsem(&sbi->pin_sem);
3623 }
3624
3625 static int init_percpu_info(struct f2fs_sb_info *sbi)
3626 {
3627         int err;
3628
3629         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3630         if (err)
3631                 return err;
3632
3633         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3634         if (err)
3635                 goto err_valid_block;
3636
3637         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3638                                                                 GFP_KERNEL);
3639         if (err)
3640                 goto err_node_block;
3641         return 0;
3642
3643 err_node_block:
3644         percpu_counter_destroy(&sbi->rf_node_block_count);
3645 err_valid_block:
3646         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3647         return err;
3648 }
3649
3650 #ifdef CONFIG_BLK_DEV_ZONED
3651
3652 struct f2fs_report_zones_args {
3653         struct f2fs_dev_info *dev;
3654         bool zone_cap_mismatch;
3655 };
3656
3657 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3658                               void *data)
3659 {
3660         struct f2fs_report_zones_args *rz_args = data;
3661
3662         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3663                 return 0;
3664
3665         set_bit(idx, rz_args->dev->blkz_seq);
3666         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3667                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3668         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3669                 rz_args->zone_cap_mismatch = true;
3670
3671         return 0;
3672 }
3673
3674 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3675 {
3676         struct block_device *bdev = FDEV(devi).bdev;
3677         sector_t nr_sectors = bdev_nr_sectors(bdev);
3678         struct f2fs_report_zones_args rep_zone_arg;
3679         int ret;
3680
3681         if (!f2fs_sb_has_blkzoned(sbi))
3682                 return 0;
3683
3684         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3685                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3686                 return -EINVAL;
3687         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3688         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3689                                 __ilog2_u32(sbi->blocks_per_blkz))
3690                 return -EINVAL;
3691         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3692         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3693                                         sbi->log_blocks_per_blkz;
3694         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3695                 FDEV(devi).nr_blkz++;
3696
3697         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3698                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3699                                         * sizeof(unsigned long),
3700                                         GFP_KERNEL);
3701         if (!FDEV(devi).blkz_seq)
3702                 return -ENOMEM;
3703
3704         /* Get block zones type and zone-capacity */
3705         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3706                                         FDEV(devi).nr_blkz * sizeof(block_t),
3707                                         GFP_KERNEL);
3708         if (!FDEV(devi).zone_capacity_blocks)
3709                 return -ENOMEM;
3710
3711         rep_zone_arg.dev = &FDEV(devi);
3712         rep_zone_arg.zone_cap_mismatch = false;
3713
3714         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3715                                   &rep_zone_arg);
3716         if (ret < 0)
3717                 return ret;
3718
3719         if (!rep_zone_arg.zone_cap_mismatch) {
3720                 kfree(FDEV(devi).zone_capacity_blocks);
3721                 FDEV(devi).zone_capacity_blocks = NULL;
3722         }
3723
3724         return 0;
3725 }
3726 #endif
3727
3728 /*
3729  * Read f2fs raw super block.
3730  * Because we have two copies of super block, so read both of them
3731  * to get the first valid one. If any one of them is broken, we pass
3732  * them recovery flag back to the caller.
3733  */
3734 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3735                         struct f2fs_super_block **raw_super,
3736                         int *valid_super_block, int *recovery)
3737 {
3738         struct super_block *sb = sbi->sb;
3739         int block;
3740         struct buffer_head *bh;
3741         struct f2fs_super_block *super;
3742         int err = 0;
3743
3744         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3745         if (!super)
3746                 return -ENOMEM;
3747
3748         for (block = 0; block < 2; block++) {
3749                 bh = sb_bread(sb, block);
3750                 if (!bh) {
3751                         f2fs_err(sbi, "Unable to read %dth superblock",
3752                                  block + 1);
3753                         err = -EIO;
3754                         *recovery = 1;
3755                         continue;
3756                 }
3757
3758                 /* sanity checking of raw super */
3759                 err = sanity_check_raw_super(sbi, bh);
3760                 if (err) {
3761                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3762                                  block + 1);
3763                         brelse(bh);
3764                         *recovery = 1;
3765                         continue;
3766                 }
3767
3768                 if (!*raw_super) {
3769                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3770                                                         sizeof(*super));
3771                         *valid_super_block = block;
3772                         *raw_super = super;
3773                 }
3774                 brelse(bh);
3775         }
3776
3777         /* No valid superblock */
3778         if (!*raw_super)
3779                 kfree(super);
3780         else
3781                 err = 0;
3782
3783         return err;
3784 }
3785
3786 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3787 {
3788         struct buffer_head *bh;
3789         __u32 crc = 0;
3790         int err;
3791
3792         if ((recover && f2fs_readonly(sbi->sb)) ||
3793                                 bdev_read_only(sbi->sb->s_bdev)) {
3794                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3795                 return -EROFS;
3796         }
3797
3798         /* we should update superblock crc here */
3799         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3800                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3801                                 offsetof(struct f2fs_super_block, crc));
3802                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3803         }
3804
3805         /* write back-up superblock first */
3806         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3807         if (!bh)
3808                 return -EIO;
3809         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3810         brelse(bh);
3811
3812         /* if we are in recovery path, skip writing valid superblock */
3813         if (recover || err)
3814                 return err;
3815
3816         /* write current valid superblock */
3817         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3818         if (!bh)
3819                 return -EIO;
3820         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3821         brelse(bh);
3822         return err;
3823 }
3824
3825 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3826 {
3827         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3828         unsigned int max_devices = MAX_DEVICES;
3829         unsigned int logical_blksize;
3830         int i;
3831
3832         /* Initialize single device information */
3833         if (!RDEV(0).path[0]) {
3834                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3835                         return 0;
3836                 max_devices = 1;
3837         }
3838
3839         /*
3840          * Initialize multiple devices information, or single
3841          * zoned block device information.
3842          */
3843         sbi->devs = f2fs_kzalloc(sbi,
3844                                  array_size(max_devices,
3845                                             sizeof(struct f2fs_dev_info)),
3846                                  GFP_KERNEL);
3847         if (!sbi->devs)
3848                 return -ENOMEM;
3849
3850         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3851         sbi->aligned_blksize = true;
3852
3853         for (i = 0; i < max_devices; i++) {
3854
3855                 if (i > 0 && !RDEV(i).path[0])
3856                         break;
3857
3858                 if (max_devices == 1) {
3859                         /* Single zoned block device mount */
3860                         FDEV(0).bdev =
3861                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3862                                         sbi->sb->s_mode, sbi->sb->s_type);
3863                 } else {
3864                         /* Multi-device mount */
3865                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3866                         FDEV(i).total_segments =
3867                                 le32_to_cpu(RDEV(i).total_segments);
3868                         if (i == 0) {
3869                                 FDEV(i).start_blk = 0;
3870                                 FDEV(i).end_blk = FDEV(i).start_blk +
3871                                     (FDEV(i).total_segments <<
3872                                     sbi->log_blocks_per_seg) - 1 +
3873                                     le32_to_cpu(raw_super->segment0_blkaddr);
3874                         } else {
3875                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3876                                 FDEV(i).end_blk = FDEV(i).start_blk +
3877                                         (FDEV(i).total_segments <<
3878                                         sbi->log_blocks_per_seg) - 1;
3879                         }
3880                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3881                                         sbi->sb->s_mode, sbi->sb->s_type);
3882                 }
3883                 if (IS_ERR(FDEV(i).bdev))
3884                         return PTR_ERR(FDEV(i).bdev);
3885
3886                 /* to release errored devices */
3887                 sbi->s_ndevs = i + 1;
3888
3889                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
3890                         sbi->aligned_blksize = false;
3891
3892 #ifdef CONFIG_BLK_DEV_ZONED
3893                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3894                                 !f2fs_sb_has_blkzoned(sbi)) {
3895                         f2fs_err(sbi, "Zoned block device feature not enabled");
3896                         return -EINVAL;
3897                 }
3898                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3899                         if (init_blkz_info(sbi, i)) {
3900                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3901                                 return -EINVAL;
3902                         }
3903                         if (max_devices == 1)
3904                                 break;
3905                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3906                                   i, FDEV(i).path,
3907                                   FDEV(i).total_segments,
3908                                   FDEV(i).start_blk, FDEV(i).end_blk,
3909                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3910                                   "Host-aware" : "Host-managed");
3911                         continue;
3912                 }
3913 #endif
3914                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3915                           i, FDEV(i).path,
3916                           FDEV(i).total_segments,
3917                           FDEV(i).start_blk, FDEV(i).end_blk);
3918         }
3919         f2fs_info(sbi,
3920                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3921         return 0;
3922 }
3923
3924 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3925 {
3926 #if IS_ENABLED(CONFIG_UNICODE)
3927         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3928                 const struct f2fs_sb_encodings *encoding_info;
3929                 struct unicode_map *encoding;
3930                 __u16 encoding_flags;
3931
3932                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
3933                 if (!encoding_info) {
3934                         f2fs_err(sbi,
3935                                  "Encoding requested by superblock is unknown");
3936                         return -EINVAL;
3937                 }
3938
3939                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
3940                 encoding = utf8_load(encoding_info->version);
3941                 if (IS_ERR(encoding)) {
3942                         f2fs_err(sbi,
3943                                  "can't mount with superblock charset: %s-%u.%u.%u "
3944                                  "not supported by the kernel. flags: 0x%x.",
3945                                  encoding_info->name,
3946                                  unicode_major(encoding_info->version),
3947                                  unicode_minor(encoding_info->version),
3948                                  unicode_rev(encoding_info->version),
3949                                  encoding_flags);
3950                         return PTR_ERR(encoding);
3951                 }
3952                 f2fs_info(sbi, "Using encoding defined by superblock: "
3953                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
3954                          unicode_major(encoding_info->version),
3955                          unicode_minor(encoding_info->version),
3956                          unicode_rev(encoding_info->version),
3957                          encoding_flags);
3958
3959                 sbi->sb->s_encoding = encoding;
3960                 sbi->sb->s_encoding_flags = encoding_flags;
3961         }
3962 #else
3963         if (f2fs_sb_has_casefold(sbi)) {
3964                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3965                 return -EINVAL;
3966         }
3967 #endif
3968         return 0;
3969 }
3970
3971 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3972 {
3973         struct f2fs_sm_info *sm_i = SM_I(sbi);
3974
3975         /* adjust parameters according to the volume size */
3976         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3977                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3978                 if (f2fs_block_unit_discard(sbi))
3979                         sm_i->dcc_info->discard_granularity = 1;
3980                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE |
3981                                         1 << F2FS_IPU_HONOR_OPU_WRITE;
3982         }
3983
3984         sbi->readdir_ra = 1;
3985 }
3986
3987 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3988 {
3989         struct f2fs_sb_info *sbi;
3990         struct f2fs_super_block *raw_super;
3991         struct inode *root;
3992         int err;
3993         bool skip_recovery = false, need_fsck = false;
3994         char *options = NULL;
3995         int recovery, i, valid_super_block;
3996         struct curseg_info *seg_i;
3997         int retry_cnt = 1;
3998
3999 try_onemore:
4000         err = -EINVAL;
4001         raw_super = NULL;
4002         valid_super_block = -1;
4003         recovery = 0;
4004
4005         /* allocate memory for f2fs-specific super block info */
4006         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4007         if (!sbi)
4008                 return -ENOMEM;
4009
4010         sbi->sb = sb;
4011
4012         /* Load the checksum driver */
4013         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4014         if (IS_ERR(sbi->s_chksum_driver)) {
4015                 f2fs_err(sbi, "Cannot load crc32 driver.");
4016                 err = PTR_ERR(sbi->s_chksum_driver);
4017                 sbi->s_chksum_driver = NULL;
4018                 goto free_sbi;
4019         }
4020
4021         /* set a block size */
4022         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4023                 f2fs_err(sbi, "unable to set blocksize");
4024                 goto free_sbi;
4025         }
4026
4027         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4028                                                                 &recovery);
4029         if (err)
4030                 goto free_sbi;
4031
4032         sb->s_fs_info = sbi;
4033         sbi->raw_super = raw_super;
4034
4035         /* precompute checksum seed for metadata */
4036         if (f2fs_sb_has_inode_chksum(sbi))
4037                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4038                                                 sizeof(raw_super->uuid));
4039
4040         default_options(sbi);
4041         /* parse mount options */
4042         options = kstrdup((const char *)data, GFP_KERNEL);
4043         if (data && !options) {
4044                 err = -ENOMEM;
4045                 goto free_sb_buf;
4046         }
4047
4048         err = parse_options(sb, options, false);
4049         if (err)
4050                 goto free_options;
4051
4052         sb->s_maxbytes = max_file_blocks(NULL) <<
4053                                 le32_to_cpu(raw_super->log_blocksize);
4054         sb->s_max_links = F2FS_LINK_MAX;
4055
4056         err = f2fs_setup_casefold(sbi);
4057         if (err)
4058                 goto free_options;
4059
4060 #ifdef CONFIG_QUOTA
4061         sb->dq_op = &f2fs_quota_operations;
4062         sb->s_qcop = &f2fs_quotactl_ops;
4063         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4064
4065         if (f2fs_sb_has_quota_ino(sbi)) {
4066                 for (i = 0; i < MAXQUOTAS; i++) {
4067                         if (f2fs_qf_ino(sbi->sb, i))
4068                                 sbi->nquota_files++;
4069                 }
4070         }
4071 #endif
4072
4073         sb->s_op = &f2fs_sops;
4074 #ifdef CONFIG_FS_ENCRYPTION
4075         sb->s_cop = &f2fs_cryptops;
4076 #endif
4077 #ifdef CONFIG_FS_VERITY
4078         sb->s_vop = &f2fs_verityops;
4079 #endif
4080         sb->s_xattr = f2fs_xattr_handlers;
4081         sb->s_export_op = &f2fs_export_ops;
4082         sb->s_magic = F2FS_SUPER_MAGIC;
4083         sb->s_time_gran = 1;
4084         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4085                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4086         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4087         sb->s_iflags |= SB_I_CGROUPWB;
4088
4089         /* init f2fs-specific super block info */
4090         sbi->valid_super_block = valid_super_block;
4091         init_f2fs_rwsem(&sbi->gc_lock);
4092         mutex_init(&sbi->writepages);
4093         init_f2fs_rwsem(&sbi->cp_global_sem);
4094         init_f2fs_rwsem(&sbi->node_write);
4095         init_f2fs_rwsem(&sbi->node_change);
4096
4097         /* disallow all the data/node/meta page writes */
4098         set_sbi_flag(sbi, SBI_POR_DOING);
4099         spin_lock_init(&sbi->stat_lock);
4100
4101         for (i = 0; i < NR_PAGE_TYPE; i++) {
4102                 int n = (i == META) ? 1 : NR_TEMP_TYPE;
4103                 int j;
4104
4105                 sbi->write_io[i] =
4106                         f2fs_kmalloc(sbi,
4107                                      array_size(n,
4108                                                 sizeof(struct f2fs_bio_info)),
4109                                      GFP_KERNEL);
4110                 if (!sbi->write_io[i]) {
4111                         err = -ENOMEM;
4112                         goto free_bio_info;
4113                 }
4114
4115                 for (j = HOT; j < n; j++) {
4116                         init_f2fs_rwsem(&sbi->write_io[i][j].io_rwsem);
4117                         sbi->write_io[i][j].sbi = sbi;
4118                         sbi->write_io[i][j].bio = NULL;
4119                         spin_lock_init(&sbi->write_io[i][j].io_lock);
4120                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
4121                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
4122                         init_f2fs_rwsem(&sbi->write_io[i][j].bio_list_lock);
4123                 }
4124         }
4125
4126         init_f2fs_rwsem(&sbi->cp_rwsem);
4127         init_f2fs_rwsem(&sbi->quota_sem);
4128         init_waitqueue_head(&sbi->cp_wait);
4129         init_sb_info(sbi);
4130
4131         err = f2fs_init_iostat(sbi);
4132         if (err)
4133                 goto free_bio_info;
4134
4135         err = init_percpu_info(sbi);
4136         if (err)
4137                 goto free_iostat;
4138
4139         if (F2FS_IO_ALIGNED(sbi)) {
4140                 sbi->write_io_dummy =
4141                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4142                 if (!sbi->write_io_dummy) {
4143                         err = -ENOMEM;
4144                         goto free_percpu;
4145                 }
4146         }
4147
4148         /* init per sbi slab cache */
4149         err = f2fs_init_xattr_caches(sbi);
4150         if (err)
4151                 goto free_io_dummy;
4152         err = f2fs_init_page_array_cache(sbi);
4153         if (err)
4154                 goto free_xattr_cache;
4155
4156         /* get an inode for meta space */
4157         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4158         if (IS_ERR(sbi->meta_inode)) {
4159                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4160                 err = PTR_ERR(sbi->meta_inode);
4161                 goto free_page_array_cache;
4162         }
4163
4164         err = f2fs_get_valid_checkpoint(sbi);
4165         if (err) {
4166                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4167                 goto free_meta_inode;
4168         }
4169
4170         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4171                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4172         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4173                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4174                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4175         }
4176
4177         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4178                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4179
4180         /* Initialize device list */
4181         err = f2fs_scan_devices(sbi);
4182         if (err) {
4183                 f2fs_err(sbi, "Failed to find devices");
4184                 goto free_devices;
4185         }
4186
4187         err = f2fs_init_post_read_wq(sbi);
4188         if (err) {
4189                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4190                 goto free_devices;
4191         }
4192
4193         sbi->total_valid_node_count =
4194                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4195         percpu_counter_set(&sbi->total_valid_inode_count,
4196                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4197         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4198         sbi->total_valid_block_count =
4199                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4200         sbi->last_valid_block_count = sbi->total_valid_block_count;
4201         sbi->reserved_blocks = 0;
4202         sbi->current_reserved_blocks = 0;
4203         limit_reserve_root(sbi);
4204         adjust_unusable_cap_perc(sbi);
4205
4206         for (i = 0; i < NR_INODE_TYPE; i++) {
4207                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4208                 spin_lock_init(&sbi->inode_lock[i]);
4209         }
4210         mutex_init(&sbi->flush_lock);
4211
4212         f2fs_init_extent_cache_info(sbi);
4213
4214         f2fs_init_ino_entry_info(sbi);
4215
4216         f2fs_init_fsync_node_info(sbi);
4217
4218         /* setup checkpoint request control and start checkpoint issue thread */
4219         f2fs_init_ckpt_req_control(sbi);
4220         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4221                         test_opt(sbi, MERGE_CHECKPOINT)) {
4222                 err = f2fs_start_ckpt_thread(sbi);
4223                 if (err) {
4224                         f2fs_err(sbi,
4225                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4226                             err);
4227                         goto stop_ckpt_thread;
4228                 }
4229         }
4230
4231         /* setup f2fs internal modules */
4232         err = f2fs_build_segment_manager(sbi);
4233         if (err) {
4234                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4235                          err);
4236                 goto free_sm;
4237         }
4238         err = f2fs_build_node_manager(sbi);
4239         if (err) {
4240                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4241                          err);
4242                 goto free_nm;
4243         }
4244
4245         err = adjust_reserved_segment(sbi);
4246         if (err)
4247                 goto free_nm;
4248
4249         /* For write statistics */
4250         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4251
4252         /* Read accumulated write IO statistics if exists */
4253         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4254         if (__exist_node_summaries(sbi))
4255                 sbi->kbytes_written =
4256                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4257
4258         f2fs_build_gc_manager(sbi);
4259
4260         err = f2fs_build_stats(sbi);
4261         if (err)
4262                 goto free_nm;
4263
4264         /* get an inode for node space */
4265         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4266         if (IS_ERR(sbi->node_inode)) {
4267                 f2fs_err(sbi, "Failed to read node inode");
4268                 err = PTR_ERR(sbi->node_inode);
4269                 goto free_stats;
4270         }
4271
4272         /* read root inode and dentry */
4273         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4274         if (IS_ERR(root)) {
4275                 f2fs_err(sbi, "Failed to read root inode");
4276                 err = PTR_ERR(root);
4277                 goto free_node_inode;
4278         }
4279         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4280                         !root->i_size || !root->i_nlink) {
4281                 iput(root);
4282                 err = -EINVAL;
4283                 goto free_node_inode;
4284         }
4285
4286         sb->s_root = d_make_root(root); /* allocate root dentry */
4287         if (!sb->s_root) {
4288                 err = -ENOMEM;
4289                 goto free_node_inode;
4290         }
4291
4292         err = f2fs_init_compress_inode(sbi);
4293         if (err)
4294                 goto free_root_inode;
4295
4296         err = f2fs_register_sysfs(sbi);
4297         if (err)
4298                 goto free_compress_inode;
4299
4300 #ifdef CONFIG_QUOTA
4301         /* Enable quota usage during mount */
4302         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4303                 err = f2fs_enable_quotas(sb);
4304                 if (err)
4305                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4306         }
4307 #endif
4308         /* if there are any orphan inodes, free them */
4309         err = f2fs_recover_orphan_inodes(sbi);
4310         if (err)
4311                 goto free_meta;
4312
4313         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4314                 goto reset_checkpoint;
4315
4316         /* recover fsynced data */
4317         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4318                         !test_opt(sbi, NORECOVERY)) {
4319                 /*
4320                  * mount should be failed, when device has readonly mode, and
4321                  * previous checkpoint was not done by clean system shutdown.
4322                  */
4323                 if (f2fs_hw_is_readonly(sbi)) {
4324                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4325                                 err = f2fs_recover_fsync_data(sbi, true);
4326                                 if (err > 0) {
4327                                         err = -EROFS;
4328                                         f2fs_err(sbi, "Need to recover fsync data, but "
4329                                                 "write access unavailable, please try "
4330                                                 "mount w/ disable_roll_forward or norecovery");
4331                                 }
4332                                 if (err < 0)
4333                                         goto free_meta;
4334                         }
4335                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4336                         goto reset_checkpoint;
4337                 }
4338
4339                 if (need_fsck)
4340                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4341
4342                 if (skip_recovery)
4343                         goto reset_checkpoint;
4344
4345                 err = f2fs_recover_fsync_data(sbi, false);
4346                 if (err < 0) {
4347                         if (err != -ENOMEM)
4348                                 skip_recovery = true;
4349                         need_fsck = true;
4350                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4351                                  err);
4352                         goto free_meta;
4353                 }
4354         } else {
4355                 err = f2fs_recover_fsync_data(sbi, true);
4356
4357                 if (!f2fs_readonly(sb) && err > 0) {
4358                         err = -EINVAL;
4359                         f2fs_err(sbi, "Need to recover fsync data");
4360                         goto free_meta;
4361                 }
4362         }
4363
4364         /*
4365          * If the f2fs is not readonly and fsync data recovery succeeds,
4366          * check zoned block devices' write pointer consistency.
4367          */
4368         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4369                 err = f2fs_check_write_pointer(sbi);
4370                 if (err)
4371                         goto free_meta;
4372         }
4373
4374 reset_checkpoint:
4375         f2fs_init_inmem_curseg(sbi);
4376
4377         /* f2fs_recover_fsync_data() cleared this already */
4378         clear_sbi_flag(sbi, SBI_POR_DOING);
4379
4380         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4381                 err = f2fs_disable_checkpoint(sbi);
4382                 if (err)
4383                         goto sync_free_meta;
4384         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4385                 f2fs_enable_checkpoint(sbi);
4386         }
4387
4388         /*
4389          * If filesystem is not mounted as read-only then
4390          * do start the gc_thread.
4391          */
4392         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4393                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4394                 /* After POR, we can run background GC thread.*/
4395                 err = f2fs_start_gc_thread(sbi);
4396                 if (err)
4397                         goto sync_free_meta;
4398         }
4399         kvfree(options);
4400
4401         /* recover broken superblock */
4402         if (recovery) {
4403                 err = f2fs_commit_super(sbi, true);
4404                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4405                           sbi->valid_super_block ? 1 : 2, err);
4406         }
4407
4408         f2fs_join_shrinker(sbi);
4409
4410         f2fs_tuning_parameters(sbi);
4411
4412         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4413                     cur_cp_version(F2FS_CKPT(sbi)));
4414         f2fs_update_time(sbi, CP_TIME);
4415         f2fs_update_time(sbi, REQ_TIME);
4416         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4417         return 0;
4418
4419 sync_free_meta:
4420         /* safe to flush all the data */
4421         sync_filesystem(sbi->sb);
4422         retry_cnt = 0;
4423
4424 free_meta:
4425 #ifdef CONFIG_QUOTA
4426         f2fs_truncate_quota_inode_pages(sb);
4427         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4428                 f2fs_quota_off_umount(sbi->sb);
4429 #endif
4430         /*
4431          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4432          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4433          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4434          * falls into an infinite loop in f2fs_sync_meta_pages().
4435          */
4436         truncate_inode_pages_final(META_MAPPING(sbi));
4437         /* evict some inodes being cached by GC */
4438         evict_inodes(sb);
4439         f2fs_unregister_sysfs(sbi);
4440 free_compress_inode:
4441         f2fs_destroy_compress_inode(sbi);
4442 free_root_inode:
4443         dput(sb->s_root);
4444         sb->s_root = NULL;
4445 free_node_inode:
4446         f2fs_release_ino_entry(sbi, true);
4447         truncate_inode_pages_final(NODE_MAPPING(sbi));
4448         iput(sbi->node_inode);
4449         sbi->node_inode = NULL;
4450 free_stats:
4451         f2fs_destroy_stats(sbi);
4452 free_nm:
4453         /* stop discard thread before destroying node manager */
4454         f2fs_stop_discard_thread(sbi);
4455         f2fs_destroy_node_manager(sbi);
4456 free_sm:
4457         f2fs_destroy_segment_manager(sbi);
4458         f2fs_destroy_post_read_wq(sbi);
4459 stop_ckpt_thread:
4460         f2fs_stop_ckpt_thread(sbi);
4461 free_devices:
4462         destroy_device_list(sbi);
4463         kvfree(sbi->ckpt);
4464 free_meta_inode:
4465         make_bad_inode(sbi->meta_inode);
4466         iput(sbi->meta_inode);
4467         sbi->meta_inode = NULL;
4468 free_page_array_cache:
4469         f2fs_destroy_page_array_cache(sbi);
4470 free_xattr_cache:
4471         f2fs_destroy_xattr_caches(sbi);
4472 free_io_dummy:
4473         mempool_destroy(sbi->write_io_dummy);
4474 free_percpu:
4475         destroy_percpu_info(sbi);
4476 free_iostat:
4477         f2fs_destroy_iostat(sbi);
4478 free_bio_info:
4479         for (i = 0; i < NR_PAGE_TYPE; i++)
4480                 kvfree(sbi->write_io[i]);
4481
4482 #if IS_ENABLED(CONFIG_UNICODE)
4483         utf8_unload(sb->s_encoding);
4484         sb->s_encoding = NULL;
4485 #endif
4486 free_options:
4487 #ifdef CONFIG_QUOTA
4488         for (i = 0; i < MAXQUOTAS; i++)
4489                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4490 #endif
4491         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4492         kvfree(options);
4493 free_sb_buf:
4494         kfree(raw_super);
4495 free_sbi:
4496         if (sbi->s_chksum_driver)
4497                 crypto_free_shash(sbi->s_chksum_driver);
4498         kfree(sbi);
4499
4500         /* give only one another chance */
4501         if (retry_cnt > 0 && skip_recovery) {
4502                 retry_cnt--;
4503                 shrink_dcache_sb(sb);
4504                 goto try_onemore;
4505         }
4506         return err;
4507 }
4508
4509 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4510                         const char *dev_name, void *data)
4511 {
4512         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4513 }
4514
4515 static void kill_f2fs_super(struct super_block *sb)
4516 {
4517         if (sb->s_root) {
4518                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4519
4520                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4521                 f2fs_stop_gc_thread(sbi);
4522                 f2fs_stop_discard_thread(sbi);
4523
4524 #ifdef CONFIG_F2FS_FS_COMPRESSION
4525                 /*
4526                  * latter evict_inode() can bypass checking and invalidating
4527                  * compress inode cache.
4528                  */
4529                 if (test_opt(sbi, COMPRESS_CACHE))
4530                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4531 #endif
4532
4533                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4534                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4535                         struct cp_control cpc = {
4536                                 .reason = CP_UMOUNT,
4537                         };
4538                         f2fs_write_checkpoint(sbi, &cpc);
4539                 }
4540
4541                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4542                         sb->s_flags &= ~SB_RDONLY;
4543         }
4544         kill_block_super(sb);
4545 }
4546
4547 static struct file_system_type f2fs_fs_type = {
4548         .owner          = THIS_MODULE,
4549         .name           = "f2fs",
4550         .mount          = f2fs_mount,
4551         .kill_sb        = kill_f2fs_super,
4552         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4553 };
4554 MODULE_ALIAS_FS("f2fs");
4555
4556 static int __init init_inodecache(void)
4557 {
4558         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4559                         sizeof(struct f2fs_inode_info), 0,
4560                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4561         if (!f2fs_inode_cachep)
4562                 return -ENOMEM;
4563         return 0;
4564 }
4565
4566 static void destroy_inodecache(void)
4567 {
4568         /*
4569          * Make sure all delayed rcu free inodes are flushed before we
4570          * destroy cache.
4571          */
4572         rcu_barrier();
4573         kmem_cache_destroy(f2fs_inode_cachep);
4574 }
4575
4576 static int __init init_f2fs_fs(void)
4577 {
4578         int err;
4579
4580         if (PAGE_SIZE != F2FS_BLKSIZE) {
4581                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4582                                 PAGE_SIZE, F2FS_BLKSIZE);
4583                 return -EINVAL;
4584         }
4585
4586         err = init_inodecache();
4587         if (err)
4588                 goto fail;
4589         err = f2fs_create_node_manager_caches();
4590         if (err)
4591                 goto free_inodecache;
4592         err = f2fs_create_segment_manager_caches();
4593         if (err)
4594                 goto free_node_manager_caches;
4595         err = f2fs_create_checkpoint_caches();
4596         if (err)
4597                 goto free_segment_manager_caches;
4598         err = f2fs_create_recovery_cache();
4599         if (err)
4600                 goto free_checkpoint_caches;
4601         err = f2fs_create_extent_cache();
4602         if (err)
4603                 goto free_recovery_cache;
4604         err = f2fs_create_garbage_collection_cache();
4605         if (err)
4606                 goto free_extent_cache;
4607         err = f2fs_init_sysfs();
4608         if (err)
4609                 goto free_garbage_collection_cache;
4610         err = register_shrinker(&f2fs_shrinker_info);
4611         if (err)
4612                 goto free_sysfs;
4613         err = register_filesystem(&f2fs_fs_type);
4614         if (err)
4615                 goto free_shrinker;
4616         f2fs_create_root_stats();
4617         err = f2fs_init_post_read_processing();
4618         if (err)
4619                 goto free_root_stats;
4620         err = f2fs_init_iostat_processing();
4621         if (err)
4622                 goto free_post_read;
4623         err = f2fs_init_bio_entry_cache();
4624         if (err)
4625                 goto free_iostat;
4626         err = f2fs_init_bioset();
4627         if (err)
4628                 goto free_bio_enrty_cache;
4629         err = f2fs_init_compress_mempool();
4630         if (err)
4631                 goto free_bioset;
4632         err = f2fs_init_compress_cache();
4633         if (err)
4634                 goto free_compress_mempool;
4635         err = f2fs_create_casefold_cache();
4636         if (err)
4637                 goto free_compress_cache;
4638         return 0;
4639 free_compress_cache:
4640         f2fs_destroy_compress_cache();
4641 free_compress_mempool:
4642         f2fs_destroy_compress_mempool();
4643 free_bioset:
4644         f2fs_destroy_bioset();
4645 free_bio_enrty_cache:
4646         f2fs_destroy_bio_entry_cache();
4647 free_iostat:
4648         f2fs_destroy_iostat_processing();
4649 free_post_read:
4650         f2fs_destroy_post_read_processing();
4651 free_root_stats:
4652         f2fs_destroy_root_stats();
4653         unregister_filesystem(&f2fs_fs_type);
4654 free_shrinker:
4655         unregister_shrinker(&f2fs_shrinker_info);
4656 free_sysfs:
4657         f2fs_exit_sysfs();
4658 free_garbage_collection_cache:
4659         f2fs_destroy_garbage_collection_cache();
4660 free_extent_cache:
4661         f2fs_destroy_extent_cache();
4662 free_recovery_cache:
4663         f2fs_destroy_recovery_cache();
4664 free_checkpoint_caches:
4665         f2fs_destroy_checkpoint_caches();
4666 free_segment_manager_caches:
4667         f2fs_destroy_segment_manager_caches();
4668 free_node_manager_caches:
4669         f2fs_destroy_node_manager_caches();
4670 free_inodecache:
4671         destroy_inodecache();
4672 fail:
4673         return err;
4674 }
4675
4676 static void __exit exit_f2fs_fs(void)
4677 {
4678         f2fs_destroy_casefold_cache();
4679         f2fs_destroy_compress_cache();
4680         f2fs_destroy_compress_mempool();
4681         f2fs_destroy_bioset();
4682         f2fs_destroy_bio_entry_cache();
4683         f2fs_destroy_iostat_processing();
4684         f2fs_destroy_post_read_processing();
4685         f2fs_destroy_root_stats();
4686         unregister_filesystem(&f2fs_fs_type);
4687         unregister_shrinker(&f2fs_shrinker_info);
4688         f2fs_exit_sysfs();
4689         f2fs_destroy_garbage_collection_cache();
4690         f2fs_destroy_extent_cache();
4691         f2fs_destroy_recovery_cache();
4692         f2fs_destroy_checkpoint_caches();
4693         f2fs_destroy_segment_manager_caches();
4694         f2fs_destroy_node_manager_caches();
4695         destroy_inodecache();
4696 }
4697
4698 module_init(init_f2fs_fs)
4699 module_exit(exit_f2fs_fs)
4700
4701 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4702 MODULE_DESCRIPTION("Flash Friendly File System");
4703 MODULE_LICENSE("GPL");
4704 MODULE_SOFTDEP("pre: crc32");
4705