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_alloc,
 142         Opt_fsync,
 143         Opt_test_dummy_encryption,
 144         Opt_inlinecrypt,
 145         Opt_checkpoint_disable,
 146         Opt_checkpoint_disable_cap,
 147         Opt_checkpoint_disable_cap_perc,
 148         Opt_checkpoint_enable,
 149         Opt_checkpoint_merge,
 150         Opt_nocheckpoint_merge,
 151         Opt_compress_algorithm,
 152         Opt_compress_log_size,
 153         Opt_compress_extension,
 154         Opt_nocompress_extension,
 155         Opt_compress_chksum,
 156         Opt_compress_mode,
 157         Opt_compress_cache,
 158         Opt_atgc,
 159         Opt_gc_merge,
 160         Opt_nogc_merge,
 161         Opt_discard_unit,
 162         Opt_err,
 163 };
 164
 165 static match_table_t f2fs_tokens = {
 166         {Opt_gc_background, "background_gc=%s"},
 167         {Opt_disable_roll_forward, "disable_roll_forward"},
 168         {Opt_norecovery, "norecovery"},
 169         {Opt_discard, "discard"},
 170         {Opt_nodiscard, "nodiscard"},
 171         {Opt_noheap, "no_heap"},
 172         {Opt_heap, "heap"},
 173         {Opt_user_xattr, "user_xattr"},
 174         {Opt_nouser_xattr, "nouser_xattr"},
 175         {Opt_acl, "acl"},
 176         {Opt_noacl, "noacl"},
 177         {Opt_active_logs, "active_logs=%u"},
 178         {Opt_disable_ext_identify, "disable_ext_identify"},
 179         {Opt_inline_xattr, "inline_xattr"},
 180         {Opt_noinline_xattr, "noinline_xattr"},
 181         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 182         {Opt_inline_data, "inline_data"},
 183         {Opt_inline_dentry, "inline_dentry"},
 184         {Opt_noinline_dentry, "noinline_dentry"},
 185         {Opt_flush_merge, "flush_merge"},
 186         {Opt_noflush_merge, "noflush_merge"},
 187         {Opt_nobarrier, "nobarrier"},
 188         {Opt_fastboot, "fastboot"},
 189         {Opt_extent_cache, "extent_cache"},
 190         {Opt_noextent_cache, "noextent_cache"},
 191         {Opt_noinline_data, "noinline_data"},
 192         {Opt_data_flush, "data_flush"},
 193         {Opt_reserve_root, "reserve_root=%u"},
 194         {Opt_resgid, "resgid=%u"},
 195         {Opt_resuid, "resuid=%u"},
 196         {Opt_mode, "mode=%s"},
 197         {Opt_io_size_bits, "io_bits=%u"},
 198         {Opt_fault_injection, "fault_injection=%u"},
 199         {Opt_fault_type, "fault_type=%u"},
 200         {Opt_lazytime, "lazytime"},
 201         {Opt_nolazytime, "nolazytime"},
 202         {Opt_quota, "quota"},
 203         {Opt_noquota, "noquota"},
 204         {Opt_usrquota, "usrquota"},
 205         {Opt_grpquota, "grpquota"},
 206         {Opt_prjquota, "prjquota"},
 207         {Opt_usrjquota, "usrjquota=%s"},
 208         {Opt_grpjquota, "grpjquota=%s"},
 209         {Opt_prjjquota, "prjjquota=%s"},
 210         {Opt_offusrjquota, "usrjquota="},
 211         {Opt_offgrpjquota, "grpjquota="},
 212         {Opt_offprjjquota, "prjjquota="},
 213         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 214         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 215         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 216         {Opt_alloc, "alloc_mode=%s"},
 217         {Opt_fsync, "fsync_mode=%s"},
 218         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 219         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 220         {Opt_inlinecrypt, "inlinecrypt"},
 221         {Opt_checkpoint_disable, "checkpoint=disable"},
 222         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 223         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 224         {Opt_checkpoint_enable, "checkpoint=enable"},
 225         {Opt_checkpoint_merge, "checkpoint_merge"},
 226         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 227         {Opt_compress_algorithm, "compress_algorithm=%s"},
 228         {Opt_compress_log_size, "compress_log_size=%u"},
 229         {Opt_compress_extension, "compress_extension=%s"},
 230         {Opt_nocompress_extension, "nocompress_extension=%s"},
 231         {Opt_compress_chksum, "compress_chksum"},
 232         {Opt_compress_mode, "compress_mode=%s"},
 233         {Opt_compress_cache, "compress_cache"},
 234         {Opt_atgc, "atgc"},
 235         {Opt_gc_merge, "gc_merge"},
 236         {Opt_nogc_merge, "nogc_merge"},
 237         {Opt_discard_unit, "discard_unit=%s"},
 238         {Opt_err, NULL},
 239 };
 240
 241 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 242 {
 243         struct va_format vaf;
 244         va_list args;
 245         int level;
 246
 247         va_start(args, fmt);
 248
 249         level = printk_get_level(fmt);
 250         vaf.fmt = printk_skip_level(fmt);
 251         vaf.va = &args;
 252         printk("%c%cF2FS-fs (%s): %pV\n",
 253                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 254
 255         va_end(args);
 256 }
 257
 258 #if IS_ENABLED(CONFIG_UNICODE)
 259 static const struct f2fs_sb_encodings {
 260         __u16 magic;
 261         char *name;
 262         unsigned int version;
 263 } f2fs_sb_encoding_map[] = {
 264         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 265 };
 266
 267 static const struct f2fs_sb_encodings *
 268 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 269 {
 270         __u16 magic = le16_to_cpu(sb->s_encoding);
 271         int i;
 272
 273         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 274                 if (magic == f2fs_sb_encoding_map[i].magic)
 275                         return &f2fs_sb_encoding_map[i];
 276
 277         return NULL;
 278 }
 279
 280 struct kmem_cache *f2fs_cf_name_slab;
 281 static int __init f2fs_create_casefold_cache(void)
 282 {
 283         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 284                                                         F2FS_NAME_LEN);
 285         if (!f2fs_cf_name_slab)
 286                 return -ENOMEM;
 287         return 0;
 288 }
 289
 290 static void f2fs_destroy_casefold_cache(void)
 291 {
 292         kmem_cache_destroy(f2fs_cf_name_slab);
 293 }
 294 #else
 295 static int __init f2fs_create_casefold_cache(void) { return 0; }
 296 static void f2fs_destroy_casefold_cache(void) { }
 297 #endif
 298
 299 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 300 {
 301         block_t limit = min((sbi->user_block_count << 1) / 1000,
 302                         sbi->user_block_count - sbi->reserved_blocks);
 303
 304         /* limit is 0.2% */
 305         if (test_opt(sbi, RESERVE_ROOT) &&
 306                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 307                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 308                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 309                           F2FS_OPTION(sbi).root_reserved_blocks);
 310         }
 311         if (!test_opt(sbi, RESERVE_ROOT) &&
 312                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 313                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 314                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 315                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 316                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 317                           from_kuid_munged(&init_user_ns,
 318                                            F2FS_OPTION(sbi).s_resuid),
 319                           from_kgid_munged(&init_user_ns,
 320                                            F2FS_OPTION(sbi).s_resgid));
 321 }
 322
 323 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 324 {
 325         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 326         unsigned int avg_vblocks;
 327         unsigned int wanted_reserved_segments;
 328         block_t avail_user_block_count;
 329
 330         if (!F2FS_IO_ALIGNED(sbi))
 331                 return 0;
 332
 333         /* average valid block count in section in worst case */
 334         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 335
 336         /*
 337          * we need enough free space when migrating one section in worst case
 338          */
 339         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 340                                                 reserved_segments(sbi);
 341         wanted_reserved_segments -= reserved_segments(sbi);
 342
 343         avail_user_block_count = sbi->user_block_count -
 344                                 sbi->current_reserved_blocks -
 345                                 F2FS_OPTION(sbi).root_reserved_blocks;
 346
 347         if (wanted_reserved_segments * sbi->blocks_per_seg >
 348                                         avail_user_block_count) {
 349                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 350                         wanted_reserved_segments,
 351                         avail_user_block_count >> sbi->log_blocks_per_seg);
 352                 return -ENOSPC;
 353         }
 354
 355         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 356
 357         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 358                          wanted_reserved_segments);
 359
 360         return 0;
 361 }
 362
 363 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 364 {
 365         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 366                 return;
 367
 368         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 369                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 370         else
 371                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 372                                         F2FS_OPTION(sbi).unusable_cap_perc;
 373
 374         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 375                         F2FS_OPTION(sbi).unusable_cap,
 376                         F2FS_OPTION(sbi).unusable_cap_perc);
 377 }
 378
 379 static void init_once(void *foo)
 380 {
 381         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 382
 383         inode_init_once(&fi->vfs_inode);
 384 }
 385
 386 #ifdef CONFIG_QUOTA
 387 static const char * const quotatypes[] = INITQFNAMES;
 388 #define QTYPE2NAME(t) (quotatypes[t])
 389 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 390                                                         substring_t *args)
 391 {
 392         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 393         char *qname;
 394         int ret = -EINVAL;
 395
 396         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 397                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 398                 return -EINVAL;
 399         }
 400         if (f2fs_sb_has_quota_ino(sbi)) {
 401                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 402                 return 0;
 403         }
 404
 405         qname = match_strdup(args);
 406         if (!qname) {
 407                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 408                 return -ENOMEM;
 409         }
 410         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 411                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 412                         ret = 0;
 413                 else
 414                         f2fs_err(sbi, "%s quota file already specified",
 415                                  QTYPE2NAME(qtype));
 416                 goto errout;
 417         }
 418         if (strchr(qname, '/')) {
 419                 f2fs_err(sbi, "quotafile must be on filesystem root");
 420                 goto errout;
 421         }
 422         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 423         set_opt(sbi, QUOTA);
 424         return 0;
 425 errout:
 426         kfree(qname);
 427         return ret;
 428 }
 429
 430 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 431 {
 432         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 433
 434         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 435                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 436                 return -EINVAL;
 437         }
 438         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 439         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 440         return 0;
 441 }
 442
 443 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 444 {
 445         /*
 446          * We do the test below only for project quotas. 'usrquota' and
 447          * 'grpquota' mount options are allowed even without quota feature
 448          * to support legacy quotas in quota files.
 449          */
 450         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 451                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 452                 return -1;
 453         }
 454         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 455                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 456                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 457                 if (test_opt(sbi, USRQUOTA) &&
 458                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 459                         clear_opt(sbi, USRQUOTA);
 460
 461                 if (test_opt(sbi, GRPQUOTA) &&
 462                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 463                         clear_opt(sbi, GRPQUOTA);
 464
 465                 if (test_opt(sbi, PRJQUOTA) &&
 466                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 467                         clear_opt(sbi, PRJQUOTA);
 468
 469                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 470                                 test_opt(sbi, PRJQUOTA)) {
 471                         f2fs_err(sbi, "old and new quota format mixing");
 472                         return -1;
 473                 }
 474
 475                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 476                         f2fs_err(sbi, "journaled quota format not specified");
 477                         return -1;
 478                 }
 479         }
 480
 481         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 482                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 483                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 484         }
 485         return 0;
 486 }
 487 #endif
 488
 489 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 490                                           const char *opt,
 491                                           const substring_t *arg,
 492                                           bool is_remount)
 493 {
 494         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 495 #ifdef CONFIG_FS_ENCRYPTION
 496         int err;
 497
 498         if (!f2fs_sb_has_encrypt(sbi)) {
 499                 f2fs_err(sbi, "Encrypt feature is off");
 500                 return -EINVAL;
 501         }
 502
 503         /*
 504          * This mount option is just for testing, and it's not worthwhile to
 505          * implement the extra complexity (e.g. RCU protection) that would be
 506          * needed to allow it to be set or changed during remount.  We do allow
 507          * it to be specified during remount, but only if there is no change.
 508          */
 509         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 510                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 511                 return -EINVAL;
 512         }
 513         err = fscrypt_set_test_dummy_encryption(
 514                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 515         if (err) {
 516                 if (err == -EEXIST)
 517                         f2fs_warn(sbi,
 518                                   "Can't change test_dummy_encryption on remount");
 519                 else if (err == -EINVAL)
 520                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 521                                   opt);
 522                 else
 523                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 524                                   opt, err);
 525                 return -EINVAL;
 526         }
 527         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 528 #else
 529         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 530 #endif
 531         return 0;
 532 }
 533
 534 #ifdef CONFIG_F2FS_FS_COMPRESSION
 535 /*
 536  * 1. The same extension name cannot not appear in both compress and non-compress extension
 537  * at the same time.
 538  * 2. If the compress extension specifies all files, the types specified by the non-compress
 539  * extension will be treated as special cases and will not be compressed.
 540  * 3. Don't allow the non-compress extension specifies all files.
 541  */
 542 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 543 {
 544         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 545         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 546         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 547
 548         ext = F2FS_OPTION(sbi).extensions;
 549         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 550         noext = F2FS_OPTION(sbi).noextensions;
 551         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 552
 553         if (!noext_cnt)
 554                 return 0;
 555
 556         for (no_index = 0; no_index < noext_cnt; no_index++) {
 557                 if (!strcasecmp("*", noext[no_index])) {
 558                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 559                         return -EINVAL;
 560                 }
 561                 for (index = 0; index < ext_cnt; index++) {
 562                         if (!strcasecmp(ext[index], noext[no_index])) {
 563                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 564                                                 ext[index]);
 565                                 return -EINVAL;
 566                         }
 567                 }
 568         }
 569         return 0;
 570 }
 571
 572 #ifdef CONFIG_F2FS_FS_LZ4
 573 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 574 {
 575 #ifdef CONFIG_F2FS_FS_LZ4HC
 576         unsigned int level;
 577 #endif
 578
 579         if (strlen(str) == 3) {
 580                 F2FS_OPTION(sbi).compress_level = 0;
 581                 return 0;
 582         }
 583
 584 #ifdef CONFIG_F2FS_FS_LZ4HC
 585         str += 3;
 586
 587         if (str[0] != ':') {
 588                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 589                 return -EINVAL;
 590         }
 591         if (kstrtouint(str + 1, 10, &level))
 592                 return -EINVAL;
 593
 594         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 595                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 596                 return -EINVAL;
 597         }
 598
 599         F2FS_OPTION(sbi).compress_level = level;
 600         return 0;
 601 #else
 602         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 603         return -EINVAL;
 604 #endif
 605 }
 606 #endif
 607
 608 #ifdef CONFIG_F2FS_FS_ZSTD
 609 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 610 {
 611         unsigned int level;
 612         int len = 4;
 613
 614         if (strlen(str) == len) {
 615                 F2FS_OPTION(sbi).compress_level = 0;
 616                 return 0;
 617         }
 618
 619         str += len;
 620
 621         if (str[0] != ':') {
 622                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 623                 return -EINVAL;
 624         }
 625         if (kstrtouint(str + 1, 10, &level))
 626                 return -EINVAL;
 627
 628         if (!level || level > zstd_max_clevel()) {
 629                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 630                 return -EINVAL;
 631         }
 632
 633         F2FS_OPTION(sbi).compress_level = level;
 634         return 0;
 635 }
 636 #endif
 637 #endif
 638
 639 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 640 {
 641         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 642         substring_t args[MAX_OPT_ARGS];
 643 #ifdef CONFIG_F2FS_FS_COMPRESSION
 644         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 645         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 646         int ext_cnt, noext_cnt;
 647 #endif
 648         char *p, *name;
 649         int arg = 0;
 650         kuid_t uid;
 651         kgid_t gid;
 652         int ret;
 653
 654         if (!options)
 655                 goto default_check;
 656
 657         while ((p = strsep(&options, ",")) != NULL) {
 658                 int token;
 659
 660                 if (!*p)
 661                         continue;
 662                 /*
 663                  * Initialize args struct so we know whether arg was
 664                  * found; some options take optional arguments.
 665                  */
 666                 args[0].to = args[0].from = NULL;
 667                 token = match_token(p, f2fs_tokens, args);
 668
 669                 switch (token) {
 670                 case Opt_gc_background:
 671                         name = match_strdup(&args[0]);
 672
 673                         if (!name)
 674                                 return -ENOMEM;
 675                         if (!strcmp(name, "on")) {
 676                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 677                         } else if (!strcmp(name, "off")) {
 678                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 679                         } else if (!strcmp(name, "sync")) {
 680                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 681                         } else {
 682                                 kfree(name);
 683                                 return -EINVAL;
 684                         }
 685                         kfree(name);
 686                         break;
 687                 case Opt_disable_roll_forward:
 688                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 689                         break;
 690                 case Opt_norecovery:
 691                         /* this option mounts f2fs with ro */
 692                         set_opt(sbi, NORECOVERY);
 693                         if (!f2fs_readonly(sb))
 694                                 return -EINVAL;
 695                         break;
 696                 case Opt_discard:
 697                         if (!f2fs_hw_support_discard(sbi)) {
 698                                 f2fs_warn(sbi, "device does not support discard");
 699                                 break;
 700                         }
 701                         set_opt(sbi, DISCARD);
 702                         break;
 703                 case Opt_nodiscard:
 704                         if (f2fs_hw_should_discard(sbi)) {
 705                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 706                                 return -EINVAL;
 707                         }
 708                         clear_opt(sbi, DISCARD);
 709                         break;
 710                 case Opt_noheap:
 711                         set_opt(sbi, NOHEAP);
 712                         break;
 713                 case Opt_heap:
 714                         clear_opt(sbi, NOHEAP);
 715                         break;
 716 #ifdef CONFIG_F2FS_FS_XATTR
 717                 case Opt_user_xattr:
 718                         set_opt(sbi, XATTR_USER);
 719                         break;
 720                 case Opt_nouser_xattr:
 721                         clear_opt(sbi, XATTR_USER);
 722                         break;
 723                 case Opt_inline_xattr:
 724                         set_opt(sbi, INLINE_XATTR);
 725                         break;
 726                 case Opt_noinline_xattr:
 727                         clear_opt(sbi, INLINE_XATTR);
 728                         break;
 729                 case Opt_inline_xattr_size:
 730                         if (args->from && match_int(args, &arg))
 731                                 return -EINVAL;
 732                         set_opt(sbi, INLINE_XATTR_SIZE);
 733                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 734                         break;
 735 #else
 736                 case Opt_user_xattr:
 737                         f2fs_info(sbi, "user_xattr options not supported");
 738                         break;
 739                 case Opt_nouser_xattr:
 740                         f2fs_info(sbi, "nouser_xattr options not supported");
 741                         break;
 742                 case Opt_inline_xattr:
 743                         f2fs_info(sbi, "inline_xattr options not supported");
 744                         break;
 745                 case Opt_noinline_xattr:
 746                         f2fs_info(sbi, "noinline_xattr options not supported");
 747                         break;
 748 #endif
 749 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 750                 case Opt_acl:
 751                         set_opt(sbi, POSIX_ACL);
 752                         break;
 753                 case Opt_noacl:
 754                         clear_opt(sbi, POSIX_ACL);
 755                         break;
 756 #else
 757                 case Opt_acl:
 758                         f2fs_info(sbi, "acl options not supported");
 759                         break;
 760                 case Opt_noacl:
 761                         f2fs_info(sbi, "noacl options not supported");
 762                         break;
 763 #endif
 764                 case Opt_active_logs:
 765                         if (args->from && match_int(args, &arg))
 766                                 return -EINVAL;
 767                         if (arg != 2 && arg != 4 &&
 768                                 arg != NR_CURSEG_PERSIST_TYPE)
 769                                 return -EINVAL;
 770                         F2FS_OPTION(sbi).active_logs = arg;
 771                         break;
 772                 case Opt_disable_ext_identify:
 773                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 774                         break;
 775                 case Opt_inline_data:
 776                         set_opt(sbi, INLINE_DATA);
 777                         break;
 778                 case Opt_inline_dentry:
 779                         set_opt(sbi, INLINE_DENTRY);
 780                         break;
 781                 case Opt_noinline_dentry:
 782                         clear_opt(sbi, INLINE_DENTRY);
 783                         break;
 784                 case Opt_flush_merge:
 785                         set_opt(sbi, FLUSH_MERGE);
 786                         break;
 787                 case Opt_noflush_merge:
 788                         clear_opt(sbi, FLUSH_MERGE);
 789                         break;
 790                 case Opt_nobarrier:
 791                         set_opt(sbi, NOBARRIER);
 792                         break;
 793                 case Opt_fastboot:
 794                         set_opt(sbi, FASTBOOT);
 795                         break;
 796                 case Opt_extent_cache:
 797                         set_opt(sbi, EXTENT_CACHE);
 798                         break;
 799                 case Opt_noextent_cache:
 800                         clear_opt(sbi, EXTENT_CACHE);
 801                         break;
 802                 case Opt_noinline_data:
 803                         clear_opt(sbi, INLINE_DATA);
 804                         break;
 805                 case Opt_data_flush:
 806                         set_opt(sbi, DATA_FLUSH);
 807                         break;
 808                 case Opt_reserve_root:
 809                         if (args->from && match_int(args, &arg))
 810                                 return -EINVAL;
 811                         if (test_opt(sbi, RESERVE_ROOT)) {
 812                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 813                                           F2FS_OPTION(sbi).root_reserved_blocks);
 814                         } else {
 815                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 816                                 set_opt(sbi, RESERVE_ROOT);
 817                         }
 818                         break;
 819                 case Opt_resuid:
 820                         if (args->from && match_int(args, &arg))
 821                                 return -EINVAL;
 822                         uid = make_kuid(current_user_ns(), arg);
 823                         if (!uid_valid(uid)) {
 824                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 825                                 return -EINVAL;
 826                         }
 827                         F2FS_OPTION(sbi).s_resuid = uid;
 828                         break;
 829                 case Opt_resgid:
 830                         if (args->from && match_int(args, &arg))
 831                                 return -EINVAL;
 832                         gid = make_kgid(current_user_ns(), arg);
 833                         if (!gid_valid(gid)) {
 834                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 835                                 return -EINVAL;
 836                         }
 837                         F2FS_OPTION(sbi).s_resgid = gid;
 838                         break;
 839                 case Opt_mode:
 840                         name = match_strdup(&args[0]);
 841
 842                         if (!name)
 843                                 return -ENOMEM;
 844                         if (!strcmp(name, "adaptive")) {
 845                                 if (f2fs_sb_has_blkzoned(sbi)) {
 846                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 847                                         kfree(name);
 848                                         return -EINVAL;
 849                                 }
 850                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 851                         } else if (!strcmp(name, "lfs")) {
 852                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 853                         } else if (!strcmp(name, "fragment:segment")) {
 854                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 855                         } else if (!strcmp(name, "fragment:block")) {
 856                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 857                         } else {
 858                                 kfree(name);
 859                                 return -EINVAL;
 860                         }
 861                         kfree(name);
 862                         break;
 863                 case Opt_io_size_bits:
 864                         if (args->from && match_int(args, &arg))
 865                                 return -EINVAL;
 866                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 867                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 868                                           1 << arg, BIO_MAX_VECS);
 869                                 return -EINVAL;
 870                         }
 871                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 872                         break;
 873 #ifdef CONFIG_F2FS_FAULT_INJECTION
 874                 case Opt_fault_injection:
 875                         if (args->from && match_int(args, &arg))
 876                                 return -EINVAL;
 877                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 878                         set_opt(sbi, FAULT_INJECTION);
 879                         break;
 880
 881                 case Opt_fault_type:
 882                         if (args->from && match_int(args, &arg))
 883                                 return -EINVAL;
 884                         f2fs_build_fault_attr(sbi, 0, arg);
 885                         set_opt(sbi, FAULT_INJECTION);
 886                         break;
 887 #else
 888                 case Opt_fault_injection:
 889                         f2fs_info(sbi, "fault_injection options not supported");
 890                         break;
 891
 892                 case Opt_fault_type:
 893                         f2fs_info(sbi, "fault_type options not supported");
 894                         break;
 895 #endif
 896                 case Opt_lazytime:
 897                         sb->s_flags |= SB_LAZYTIME;
 898                         break;
 899                 case Opt_nolazytime:
 900                         sb->s_flags &= ~SB_LAZYTIME;
 901                         break;
 902 #ifdef CONFIG_QUOTA
 903                 case Opt_quota:
 904                 case Opt_usrquota:
 905                         set_opt(sbi, USRQUOTA);
 906                         break;
 907                 case Opt_grpquota:
 908                         set_opt(sbi, GRPQUOTA);
 909                         break;
 910                 case Opt_prjquota:
 911                         set_opt(sbi, PRJQUOTA);
 912                         break;
 913                 case Opt_usrjquota:
 914                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 915                         if (ret)
 916                                 return ret;
 917                         break;
 918                 case Opt_grpjquota:
 919                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 920                         if (ret)
 921                                 return ret;
 922                         break;
 923                 case Opt_prjjquota:
 924                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 925                         if (ret)
 926                                 return ret;
 927                         break;
 928                 case Opt_offusrjquota:
 929                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 930                         if (ret)
 931                                 return ret;
 932                         break;
 933                 case Opt_offgrpjquota:
 934                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 935                         if (ret)
 936                                 return ret;
 937                         break;
 938                 case Opt_offprjjquota:
 939                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 940                         if (ret)
 941                                 return ret;
 942                         break;
 943                 case Opt_jqfmt_vfsold:
 944                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 945                         break;
 946                 case Opt_jqfmt_vfsv0:
 947                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 948                         break;
 949                 case Opt_jqfmt_vfsv1:
 950                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 951                         break;
 952                 case Opt_noquota:
 953                         clear_opt(sbi, QUOTA);
 954                         clear_opt(sbi, USRQUOTA);
 955                         clear_opt(sbi, GRPQUOTA);
 956                         clear_opt(sbi, PRJQUOTA);
 957                         break;
 958 #else
 959                 case Opt_quota:
 960                 case Opt_usrquota:
 961                 case Opt_grpquota:
 962                 case Opt_prjquota:
 963                 case Opt_usrjquota:
 964                 case Opt_grpjquota:
 965                 case Opt_prjjquota:
 966                 case Opt_offusrjquota:
 967                 case Opt_offgrpjquota:
 968                 case Opt_offprjjquota:
 969                 case Opt_jqfmt_vfsold:
 970                 case Opt_jqfmt_vfsv0:
 971                 case Opt_jqfmt_vfsv1:
 972                 case Opt_noquota:
 973                         f2fs_info(sbi, "quota operations not supported");
 974                         break;
 975 #endif
 976                 case Opt_alloc:
 977                         name = match_strdup(&args[0]);
 978                         if (!name)
 979                                 return -ENOMEM;
 980
 981                         if (!strcmp(name, "default")) {
 982                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 983                         } else if (!strcmp(name, "reuse")) {
 984                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 985                         } else {
 986                                 kfree(name);
 987                                 return -EINVAL;
 988                         }
 989                         kfree(name);
 990                         break;
 991                 case Opt_fsync:
 992                         name = match_strdup(&args[0]);
 993                         if (!name)
 994                                 return -ENOMEM;
 995                         if (!strcmp(name, "posix")) {
 996                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 997                         } else if (!strcmp(name, "strict")) {
 998                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 999                         } else if (!strcmp(name, "nobarrier")) {
1000                                 F2FS_OPTION(sbi).fsync_mode =
1001                                                         FSYNC_MODE_NOBARRIER;
1002                         } else {
1003                                 kfree(name);
1004                                 return -EINVAL;
1005                         }
1006                         kfree(name);
1007                         break;
1008                 case Opt_test_dummy_encryption:
1009                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1010                                                              is_remount);
1011                         if (ret)
1012                                 return ret;
1013                         break;
1014                 case Opt_inlinecrypt:
1015 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1016                         sb->s_flags |= SB_INLINECRYPT;
1017 #else
1018                         f2fs_info(sbi, "inline encryption not supported");
1019 #endif
1020                         break;
1021                 case Opt_checkpoint_disable_cap_perc:
1022                         if (args->from && match_int(args, &arg))
1023                                 return -EINVAL;
1024                         if (arg < 0 || arg > 100)
1025                                 return -EINVAL;
1026                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1027                         set_opt(sbi, DISABLE_CHECKPOINT);
1028                         break;
1029                 case Opt_checkpoint_disable_cap:
1030                         if (args->from && match_int(args, &arg))
1031                                 return -EINVAL;
1032                         F2FS_OPTION(sbi).unusable_cap = arg;
1033                         set_opt(sbi, DISABLE_CHECKPOINT);
1034                         break;
1035                 case Opt_checkpoint_disable:
1036                         set_opt(sbi, DISABLE_CHECKPOINT);
1037                         break;
1038                 case Opt_checkpoint_enable:
1039                         clear_opt(sbi, DISABLE_CHECKPOINT);
1040                         break;
1041                 case Opt_checkpoint_merge:
1042                         set_opt(sbi, MERGE_CHECKPOINT);
1043                         break;
1044                 case Opt_nocheckpoint_merge:
1045                         clear_opt(sbi, MERGE_CHECKPOINT);
1046                         break;
1047 #ifdef CONFIG_F2FS_FS_COMPRESSION
1048                 case Opt_compress_algorithm:
1049                         if (!f2fs_sb_has_compression(sbi)) {
1050                                 f2fs_info(sbi, "Image doesn't support compression");
1051                                 break;
1052                         }
1053                         name = match_strdup(&args[0]);
1054                         if (!name)
1055                                 return -ENOMEM;
1056                         if (!strcmp(name, "lzo")) {
1057 #ifdef CONFIG_F2FS_FS_LZO
1058                                 F2FS_OPTION(sbi).compress_level = 0;
1059                                 F2FS_OPTION(sbi).compress_algorithm =
1060                                                                 COMPRESS_LZO;
1061 #else
1062                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1063 #endif
1064                         } else if (!strncmp(name, "lz4", 3)) {
1065 #ifdef CONFIG_F2FS_FS_LZ4
1066                                 ret = f2fs_set_lz4hc_level(sbi, name);
1067                                 if (ret) {
1068                                         kfree(name);
1069                                         return -EINVAL;
1070                                 }
1071                                 F2FS_OPTION(sbi).compress_algorithm =
1072                                                                 COMPRESS_LZ4;
1073 #else
1074                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1075 #endif
1076                         } else if (!strncmp(name, "zstd", 4)) {
1077 #ifdef CONFIG_F2FS_FS_ZSTD
1078                                 ret = f2fs_set_zstd_level(sbi, name);
1079                                 if (ret) {
1080                                         kfree(name);
1081                                         return -EINVAL;
1082                                 }
1083                                 F2FS_OPTION(sbi).compress_algorithm =
1084                                                                 COMPRESS_ZSTD;
1085 #else
1086                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1087 #endif
1088                         } else if (!strcmp(name, "lzo-rle")) {
1089 #ifdef CONFIG_F2FS_FS_LZORLE
1090                                 F2FS_OPTION(sbi).compress_level = 0;
1091                                 F2FS_OPTION(sbi).compress_algorithm =
1092                                                                 COMPRESS_LZORLE;
1093 #else
1094                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1095 #endif
1096                         } else {
1097                                 kfree(name);
1098                                 return -EINVAL;
1099                         }
1100                         kfree(name);
1101                         break;
1102                 case Opt_compress_log_size:
1103                         if (!f2fs_sb_has_compression(sbi)) {
1104                                 f2fs_info(sbi, "Image doesn't support compression");
1105                                 break;
1106                         }
1107                         if (args->from && match_int(args, &arg))
1108                                 return -EINVAL;
1109                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1110                                 arg > MAX_COMPRESS_LOG_SIZE) {
1111                                 f2fs_err(sbi,
1112                                         "Compress cluster log size is out of range");
1113                                 return -EINVAL;
1114                         }
1115                         F2FS_OPTION(sbi).compress_log_size = arg;
1116                         break;
1117                 case Opt_compress_extension:
1118                         if (!f2fs_sb_has_compression(sbi)) {
1119                                 f2fs_info(sbi, "Image doesn't support compression");
1120                                 break;
1121                         }
1122                         name = match_strdup(&args[0]);
1123                         if (!name)
1124                                 return -ENOMEM;
1125
1126                         ext = F2FS_OPTION(sbi).extensions;
1127                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1128
1129                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1130                                 ext_cnt >= COMPRESS_EXT_NUM) {
1131                                 f2fs_err(sbi,
1132                                         "invalid extension length/number");
1133                                 kfree(name);
1134                                 return -EINVAL;
1135                         }
1136
1137                         strcpy(ext[ext_cnt], name);
1138                         F2FS_OPTION(sbi).compress_ext_cnt++;
1139                         kfree(name);
1140                         break;
1141                 case Opt_nocompress_extension:
1142                         if (!f2fs_sb_has_compression(sbi)) {
1143                                 f2fs_info(sbi, "Image doesn't support compression");
1144                                 break;
1145                         }
1146                         name = match_strdup(&args[0]);
1147                         if (!name)
1148                                 return -ENOMEM;
1149
1150                         noext = F2FS_OPTION(sbi).noextensions;
1151                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1152
1153                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1154                                 noext_cnt >= COMPRESS_EXT_NUM) {
1155                                 f2fs_err(sbi,
1156                                         "invalid extension length/number");
1157                                 kfree(name);
1158                                 return -EINVAL;
1159                         }
1160
1161                         strcpy(noext[noext_cnt], name);
1162                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1163                         kfree(name);
1164                         break;
1165                 case Opt_compress_chksum:
1166                         F2FS_OPTION(sbi).compress_chksum = true;
1167                         break;
1168                 case Opt_compress_mode:
1169                         name = match_strdup(&args[0]);
1170                         if (!name)
1171                                 return -ENOMEM;
1172                         if (!strcmp(name, "fs")) {
1173                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1174                         } else if (!strcmp(name, "user")) {
1175                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1176                         } else {
1177                                 kfree(name);
1178                                 return -EINVAL;
1179                         }
1180                         kfree(name);
1181                         break;
1182                 case Opt_compress_cache:
1183                         set_opt(sbi, COMPRESS_CACHE);
1184                         break;
1185 #else
1186                 case Opt_compress_algorithm:
1187                 case Opt_compress_log_size:
1188                 case Opt_compress_extension:
1189                 case Opt_nocompress_extension:
1190                 case Opt_compress_chksum:
1191                 case Opt_compress_mode:
1192                 case Opt_compress_cache:
1193                         f2fs_info(sbi, "compression options not supported");
1194                         break;
1195 #endif
1196                 case Opt_atgc:
1197                         set_opt(sbi, ATGC);
1198                         break;
1199                 case Opt_gc_merge:
1200                         set_opt(sbi, GC_MERGE);
1201                         break;
1202                 case Opt_nogc_merge:
1203                         clear_opt(sbi, GC_MERGE);
1204                         break;
1205                 case Opt_discard_unit:
1206                         name = match_strdup(&args[0]);
1207                         if (!name)
1208                                 return -ENOMEM;
1209                         if (!strcmp(name, "block")) {
1210                                 F2FS_OPTION(sbi).discard_unit =
1211                                                 DISCARD_UNIT_BLOCK;
1212                         } else if (!strcmp(name, "segment")) {
1213                                 F2FS_OPTION(sbi).discard_unit =
1214                                                 DISCARD_UNIT_SEGMENT;
1215                         } else if (!strcmp(name, "section")) {
1216                                 F2FS_OPTION(sbi).discard_unit =
1217                                                 DISCARD_UNIT_SECTION;
1218                         } else {
1219                                 kfree(name);
1220                                 return -EINVAL;
1221                         }
1222                         kfree(name);
1223                         break;
1224                 default:
1225                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1226                                  p);
1227                         return -EINVAL;
1228                 }
1229         }
1230 default_check:
1231 #ifdef CONFIG_QUOTA
1232         if (f2fs_check_quota_options(sbi))
1233                 return -EINVAL;
1234 #else
1235         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1236                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1237                 return -EINVAL;
1238         }
1239         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1240                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1241                 return -EINVAL;
1242         }
1243 #endif
1244 #if !IS_ENABLED(CONFIG_UNICODE)
1245         if (f2fs_sb_has_casefold(sbi)) {
1246                 f2fs_err(sbi,
1247                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1248                 return -EINVAL;
1249         }
1250 #endif
1251         /*
1252          * The BLKZONED feature indicates that the drive was formatted with
1253          * zone alignment optimization. This is optional for host-aware
1254          * devices, but mandatory for host-managed zoned block devices.
1255          */
1256 #ifndef CONFIG_BLK_DEV_ZONED
1257         if (f2fs_sb_has_blkzoned(sbi)) {
1258                 f2fs_err(sbi, "Zoned block device support is not enabled");
1259                 return -EINVAL;
1260         }
1261 #endif
1262         if (f2fs_sb_has_blkzoned(sbi)) {
1263                 if (F2FS_OPTION(sbi).discard_unit !=
1264                                                 DISCARD_UNIT_SECTION) {
1265                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1266                         F2FS_OPTION(sbi).discard_unit =
1267                                         DISCARD_UNIT_SECTION;
1268                 }
1269         }
1270
1271 #ifdef CONFIG_F2FS_FS_COMPRESSION
1272         if (f2fs_test_compress_extension(sbi)) {
1273                 f2fs_err(sbi, "invalid compress or nocompress extension");
1274                 return -EINVAL;
1275         }
1276 #endif
1277
1278         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1279                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1280                          F2FS_IO_SIZE_KB(sbi));
1281                 return -EINVAL;
1282         }
1283
1284         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1285                 int min_size, max_size;
1286
1287                 if (!f2fs_sb_has_extra_attr(sbi) ||
1288                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1289                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1290                         return -EINVAL;
1291                 }
1292                 if (!test_opt(sbi, INLINE_XATTR)) {
1293                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1294                         return -EINVAL;
1295                 }
1296
1297                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1298                 max_size = MAX_INLINE_XATTR_SIZE;
1299
1300                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1301                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1302                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1303                                  min_size, max_size);
1304                         return -EINVAL;
1305                 }
1306         }
1307
1308         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1309                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1310                 return -EINVAL;
1311         }
1312
1313         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1314                 f2fs_err(sbi, "Allow to mount readonly mode only");
1315                 return -EROFS;
1316         }
1317         return 0;
1318 }
1319
1320 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1321 {
1322         struct f2fs_inode_info *fi;
1323
1324         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC)) {
1325                 f2fs_show_injection_info(F2FS_SB(sb), FAULT_SLAB_ALLOC);
1326                 return NULL;
1327         }
1328
1329         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1330         if (!fi)
1331                 return NULL;
1332
1333         init_once((void *) fi);
1334
1335         /* Initialize f2fs-specific inode info */
1336         atomic_set(&fi->dirty_pages, 0);
1337         atomic_set(&fi->i_compr_blocks, 0);
1338         init_f2fs_rwsem(&fi->i_sem);
1339         spin_lock_init(&fi->i_size_lock);
1340         INIT_LIST_HEAD(&fi->dirty_list);
1341         INIT_LIST_HEAD(&fi->gdirty_list);
1342         INIT_LIST_HEAD(&fi->inmem_ilist);
1343         INIT_LIST_HEAD(&fi->inmem_pages);
1344         mutex_init(&fi->inmem_lock);
1345         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1346         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1347         init_f2fs_rwsem(&fi->i_xattr_sem);
1348
1349         /* Will be used by directory only */
1350         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1351
1352         return &fi->vfs_inode;
1353 }
1354
1355 static int f2fs_drop_inode(struct inode *inode)
1356 {
1357         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1358         int ret;
1359
1360         /*
1361          * during filesystem shutdown, if checkpoint is disabled,
1362          * drop useless meta/node dirty pages.
1363          */
1364         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1365                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1366                         inode->i_ino == F2FS_META_INO(sbi)) {
1367                         trace_f2fs_drop_inode(inode, 1);
1368                         return 1;
1369                 }
1370         }
1371
1372         /*
1373          * This is to avoid a deadlock condition like below.
1374          * writeback_single_inode(inode)
1375          *  - f2fs_write_data_page
1376          *    - f2fs_gc -> iput -> evict
1377          *       - inode_wait_for_writeback(inode)
1378          */
1379         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1380                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1381                         /* to avoid evict_inode call simultaneously */
1382                         atomic_inc(&inode->i_count);
1383                         spin_unlock(&inode->i_lock);
1384
1385                         /* some remained atomic pages should discarded */
1386                         if (f2fs_is_atomic_file(inode))
1387                                 f2fs_drop_inmem_pages(inode);
1388
1389                         /* should remain fi->extent_tree for writepage */
1390                         f2fs_destroy_extent_node(inode);
1391
1392                         sb_start_intwrite(inode->i_sb);
1393                         f2fs_i_size_write(inode, 0);
1394
1395                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1396                                         inode, NULL, 0, DATA);
1397                         truncate_inode_pages_final(inode->i_mapping);
1398
1399                         if (F2FS_HAS_BLOCKS(inode))
1400                                 f2fs_truncate(inode);
1401
1402                         sb_end_intwrite(inode->i_sb);
1403
1404                         spin_lock(&inode->i_lock);
1405                         atomic_dec(&inode->i_count);
1406                 }
1407                 trace_f2fs_drop_inode(inode, 0);
1408                 return 0;
1409         }
1410         ret = generic_drop_inode(inode);
1411         if (!ret)
1412                 ret = fscrypt_drop_inode(inode);
1413         trace_f2fs_drop_inode(inode, ret);
1414         return ret;
1415 }
1416
1417 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1418 {
1419         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1420         int ret = 0;
1421
1422         spin_lock(&sbi->inode_lock[DIRTY_META]);
1423         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1424                 ret = 1;
1425         } else {
1426                 set_inode_flag(inode, FI_DIRTY_INODE);
1427                 stat_inc_dirty_inode(sbi, DIRTY_META);
1428         }
1429         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1430                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1431                                 &sbi->inode_list[DIRTY_META]);
1432                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1433         }
1434         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1435         return ret;
1436 }
1437
1438 void f2fs_inode_synced(struct inode *inode)
1439 {
1440         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1441
1442         spin_lock(&sbi->inode_lock[DIRTY_META]);
1443         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1444                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1445                 return;
1446         }
1447         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1448                 list_del_init(&F2FS_I(inode)->gdirty_list);
1449                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1450         }
1451         clear_inode_flag(inode, FI_DIRTY_INODE);
1452         clear_inode_flag(inode, FI_AUTO_RECOVER);
1453         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1454         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1455 }
1456
1457 /*
1458  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1459  *
1460  * We should call set_dirty_inode to write the dirty inode through write_inode.
1461  */
1462 static void f2fs_dirty_inode(struct inode *inode, int flags)
1463 {
1464         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1465
1466         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1467                         inode->i_ino == F2FS_META_INO(sbi))
1468                 return;
1469
1470         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1471                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1472
1473         f2fs_inode_dirtied(inode, false);
1474 }
1475
1476 static void f2fs_free_inode(struct inode *inode)
1477 {
1478         fscrypt_free_inode(inode);
1479         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1480 }
1481
1482 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1483 {
1484         percpu_counter_destroy(&sbi->total_valid_inode_count);
1485         percpu_counter_destroy(&sbi->rf_node_block_count);
1486         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1487 }
1488
1489 static void destroy_device_list(struct f2fs_sb_info *sbi)
1490 {
1491         int i;
1492
1493         for (i = 0; i < sbi->s_ndevs; i++) {
1494                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1495 #ifdef CONFIG_BLK_DEV_ZONED
1496                 kvfree(FDEV(i).blkz_seq);
1497                 kfree(FDEV(i).zone_capacity_blocks);
1498 #endif
1499         }
1500         kvfree(sbi->devs);
1501 }
1502
1503 static void f2fs_put_super(struct super_block *sb)
1504 {
1505         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1506         int i;
1507         bool dropped;
1508
1509         /* unregister procfs/sysfs entries in advance to avoid race case */
1510         f2fs_unregister_sysfs(sbi);
1511
1512         f2fs_quota_off_umount(sb);
1513
1514         /* prevent remaining shrinker jobs */
1515         mutex_lock(&sbi->umount_mutex);
1516
1517         /*
1518          * flush all issued checkpoints and stop checkpoint issue thread.
1519          * after then, all checkpoints should be done by each process context.
1520          */
1521         f2fs_stop_ckpt_thread(sbi);
1522
1523         /*
1524          * We don't need to do checkpoint when superblock is clean.
1525          * But, the previous checkpoint was not done by umount, it needs to do
1526          * clean checkpoint again.
1527          */
1528         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1529                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1530                 struct cp_control cpc = {
1531                         .reason = CP_UMOUNT,
1532                 };
1533                 f2fs_write_checkpoint(sbi, &cpc);
1534         }
1535
1536         /* be sure to wait for any on-going discard commands */
1537         dropped = f2fs_issue_discard_timeout(sbi);
1538
1539         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1540                                         !sbi->discard_blks && !dropped) {
1541                 struct cp_control cpc = {
1542                         .reason = CP_UMOUNT | CP_TRIMMED,
1543                 };
1544                 f2fs_write_checkpoint(sbi, &cpc);
1545         }
1546
1547         /*
1548          * normally superblock is clean, so we need to release this.
1549          * In addition, EIO will skip do checkpoint, we need this as well.
1550          */
1551         f2fs_release_ino_entry(sbi, true);
1552
1553         f2fs_leave_shrinker(sbi);
1554         mutex_unlock(&sbi->umount_mutex);
1555
1556         /* our cp_error case, we can wait for any writeback page */
1557         f2fs_flush_merged_writes(sbi);
1558
1559         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1560
1561         f2fs_bug_on(sbi, sbi->fsync_node_num);
1562
1563         f2fs_destroy_compress_inode(sbi);
1564
1565         iput(sbi->node_inode);
1566         sbi->node_inode = NULL;
1567
1568         iput(sbi->meta_inode);
1569         sbi->meta_inode = NULL;
1570
1571         /*
1572          * iput() can update stat information, if f2fs_write_checkpoint()
1573          * above failed with error.
1574          */
1575         f2fs_destroy_stats(sbi);
1576
1577         /* destroy f2fs internal modules */
1578         f2fs_destroy_node_manager(sbi);
1579         f2fs_destroy_segment_manager(sbi);
1580
1581         f2fs_destroy_post_read_wq(sbi);
1582
1583         kvfree(sbi->ckpt);
1584
1585         sb->s_fs_info = NULL;
1586         if (sbi->s_chksum_driver)
1587                 crypto_free_shash(sbi->s_chksum_driver);
1588         kfree(sbi->raw_super);
1589
1590         destroy_device_list(sbi);
1591         f2fs_destroy_page_array_cache(sbi);
1592         f2fs_destroy_xattr_caches(sbi);
1593         mempool_destroy(sbi->write_io_dummy);
1594 #ifdef CONFIG_QUOTA
1595         for (i = 0; i < MAXQUOTAS; i++)
1596                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1597 #endif
1598         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1599         destroy_percpu_info(sbi);
1600         f2fs_destroy_iostat(sbi);
1601         for (i = 0; i < NR_PAGE_TYPE; i++)
1602                 kvfree(sbi->write_io[i]);
1603 #if IS_ENABLED(CONFIG_UNICODE)
1604         utf8_unload(sb->s_encoding);
1605 #endif
1606         kfree(sbi);
1607 }
1608
1609 int f2fs_sync_fs(struct super_block *sb, int sync)
1610 {
1611         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1612         int err = 0;
1613
1614         if (unlikely(f2fs_cp_error(sbi)))
1615                 return 0;
1616         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1617                 return 0;
1618
1619         trace_f2fs_sync_fs(sb, sync);
1620
1621         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1622                 return -EAGAIN;
1623
1624         if (sync)
1625                 err = f2fs_issue_checkpoint(sbi);
1626
1627         return err;
1628 }
1629
1630 static int f2fs_freeze(struct super_block *sb)
1631 {
1632         if (f2fs_readonly(sb))
1633                 return 0;
1634
1635         /* IO error happened before */
1636         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1637                 return -EIO;
1638
1639         /* must be clean, since sync_filesystem() was already called */
1640         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1641                 return -EINVAL;
1642
1643         /* ensure no checkpoint required */
1644         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1645                 return -EINVAL;
1646
1647         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1648         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1649         return 0;
1650 }
1651
1652 static int f2fs_unfreeze(struct super_block *sb)
1653 {
1654         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1655         return 0;
1656 }
1657
1658 #ifdef CONFIG_QUOTA
1659 static int f2fs_statfs_project(struct super_block *sb,
1660                                 kprojid_t projid, struct kstatfs *buf)
1661 {
1662         struct kqid qid;
1663         struct dquot *dquot;
1664         u64 limit;
1665         u64 curblock;
1666
1667         qid = make_kqid_projid(projid);
1668         dquot = dqget(sb, qid);
1669         if (IS_ERR(dquot))
1670                 return PTR_ERR(dquot);
1671         spin_lock(&dquot->dq_dqb_lock);
1672
1673         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1674                                         dquot->dq_dqb.dqb_bhardlimit);
1675         if (limit)
1676                 limit >>= sb->s_blocksize_bits;
1677
1678         if (limit && buf->f_blocks > limit) {
1679                 curblock = (dquot->dq_dqb.dqb_curspace +
1680                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1681                 buf->f_blocks = limit;
1682                 buf->f_bfree = buf->f_bavail =
1683                         (buf->f_blocks > curblock) ?
1684                          (buf->f_blocks - curblock) : 0;
1685         }
1686
1687         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1688                                         dquot->dq_dqb.dqb_ihardlimit);
1689
1690         if (limit && buf->f_files > limit) {
1691                 buf->f_files = limit;
1692                 buf->f_ffree =
1693                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1694                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1695         }
1696
1697         spin_unlock(&dquot->dq_dqb_lock);
1698         dqput(dquot);
1699         return 0;
1700 }
1701 #endif
1702
1703 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1704 {
1705         struct super_block *sb = dentry->d_sb;
1706         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1707         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1708         block_t total_count, user_block_count, start_count;
1709         u64 avail_node_count;
1710
1711         total_count = le64_to_cpu(sbi->raw_super->block_count);
1712         user_block_count = sbi->user_block_count;
1713         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1714         buf->f_type = F2FS_SUPER_MAGIC;
1715         buf->f_bsize = sbi->blocksize;
1716
1717         buf->f_blocks = total_count - start_count;
1718         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1719                                                 sbi->current_reserved_blocks;
1720
1721         spin_lock(&sbi->stat_lock);
1722         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1723                 buf->f_bfree = 0;
1724         else
1725                 buf->f_bfree -= sbi->unusable_block_count;
1726         spin_unlock(&sbi->stat_lock);
1727
1728         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1729                 buf->f_bavail = buf->f_bfree -
1730                                 F2FS_OPTION(sbi).root_reserved_blocks;
1731         else
1732                 buf->f_bavail = 0;
1733
1734         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1735
1736         if (avail_node_count > user_block_count) {
1737                 buf->f_files = user_block_count;
1738                 buf->f_ffree = buf->f_bavail;
1739         } else {
1740                 buf->f_files = avail_node_count;
1741                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1742                                         buf->f_bavail);
1743         }
1744
1745         buf->f_namelen = F2FS_NAME_LEN;
1746         buf->f_fsid    = u64_to_fsid(id);
1747
1748 #ifdef CONFIG_QUOTA
1749         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1750                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1751                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1752         }
1753 #endif
1754         return 0;
1755 }
1756
1757 static inline void f2fs_show_quota_options(struct seq_file *seq,
1758                                            struct super_block *sb)
1759 {
1760 #ifdef CONFIG_QUOTA
1761         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1762
1763         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1764                 char *fmtname = "";
1765
1766                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1767                 case QFMT_VFS_OLD:
1768                         fmtname = "vfsold";
1769                         break;
1770                 case QFMT_VFS_V0:
1771                         fmtname = "vfsv0";
1772                         break;
1773                 case QFMT_VFS_V1:
1774                         fmtname = "vfsv1";
1775                         break;
1776                 }
1777                 seq_printf(seq, ",jqfmt=%s", fmtname);
1778         }
1779
1780         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1781                 seq_show_option(seq, "usrjquota",
1782                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1783
1784         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1785                 seq_show_option(seq, "grpjquota",
1786                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1787
1788         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1789                 seq_show_option(seq, "prjjquota",
1790                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1791 #endif
1792 }
1793
1794 #ifdef CONFIG_F2FS_FS_COMPRESSION
1795 static inline void f2fs_show_compress_options(struct seq_file *seq,
1796                                                         struct super_block *sb)
1797 {
1798         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1799         char *algtype = "";
1800         int i;
1801
1802         if (!f2fs_sb_has_compression(sbi))
1803                 return;
1804
1805         switch (F2FS_OPTION(sbi).compress_algorithm) {
1806         case COMPRESS_LZO:
1807                 algtype = "lzo";
1808                 break;
1809         case COMPRESS_LZ4:
1810                 algtype = "lz4";
1811                 break;
1812         case COMPRESS_ZSTD:
1813                 algtype = "zstd";
1814                 break;
1815         case COMPRESS_LZORLE:
1816                 algtype = "lzo-rle";
1817                 break;
1818         }
1819         seq_printf(seq, ",compress_algorithm=%s", algtype);
1820
1821         if (F2FS_OPTION(sbi).compress_level)
1822                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1823
1824         seq_printf(seq, ",compress_log_size=%u",
1825                         F2FS_OPTION(sbi).compress_log_size);
1826
1827         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1828                 seq_printf(seq, ",compress_extension=%s",
1829                         F2FS_OPTION(sbi).extensions[i]);
1830         }
1831
1832         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1833                 seq_printf(seq, ",nocompress_extension=%s",
1834                         F2FS_OPTION(sbi).noextensions[i]);
1835         }
1836
1837         if (F2FS_OPTION(sbi).compress_chksum)
1838                 seq_puts(seq, ",compress_chksum");
1839
1840         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1841                 seq_printf(seq, ",compress_mode=%s", "fs");
1842         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1843                 seq_printf(seq, ",compress_mode=%s", "user");
1844
1845         if (test_opt(sbi, COMPRESS_CACHE))
1846                 seq_puts(seq, ",compress_cache");
1847 }
1848 #endif
1849
1850 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1851 {
1852         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1853
1854         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1855                 seq_printf(seq, ",background_gc=%s", "sync");
1856         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1857                 seq_printf(seq, ",background_gc=%s", "on");
1858         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1859                 seq_printf(seq, ",background_gc=%s", "off");
1860
1861         if (test_opt(sbi, GC_MERGE))
1862                 seq_puts(seq, ",gc_merge");
1863
1864         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1865                 seq_puts(seq, ",disable_roll_forward");
1866         if (test_opt(sbi, NORECOVERY))
1867                 seq_puts(seq, ",norecovery");
1868         if (test_opt(sbi, DISCARD))
1869                 seq_puts(seq, ",discard");
1870         else
1871                 seq_puts(seq, ",nodiscard");
1872         if (test_opt(sbi, NOHEAP))
1873                 seq_puts(seq, ",no_heap");
1874         else
1875                 seq_puts(seq, ",heap");
1876 #ifdef CONFIG_F2FS_FS_XATTR
1877         if (test_opt(sbi, XATTR_USER))
1878                 seq_puts(seq, ",user_xattr");
1879         else
1880                 seq_puts(seq, ",nouser_xattr");
1881         if (test_opt(sbi, INLINE_XATTR))
1882                 seq_puts(seq, ",inline_xattr");
1883         else
1884                 seq_puts(seq, ",noinline_xattr");
1885         if (test_opt(sbi, INLINE_XATTR_SIZE))
1886                 seq_printf(seq, ",inline_xattr_size=%u",
1887                                         F2FS_OPTION(sbi).inline_xattr_size);
1888 #endif
1889 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1890         if (test_opt(sbi, POSIX_ACL))
1891                 seq_puts(seq, ",acl");
1892         else
1893                 seq_puts(seq, ",noacl");
1894 #endif
1895         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1896                 seq_puts(seq, ",disable_ext_identify");
1897         if (test_opt(sbi, INLINE_DATA))
1898                 seq_puts(seq, ",inline_data");
1899         else
1900                 seq_puts(seq, ",noinline_data");
1901         if (test_opt(sbi, INLINE_DENTRY))
1902                 seq_puts(seq, ",inline_dentry");
1903         else
1904                 seq_puts(seq, ",noinline_dentry");
1905         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1906                 seq_puts(seq, ",flush_merge");
1907         if (test_opt(sbi, NOBARRIER))
1908                 seq_puts(seq, ",nobarrier");
1909         if (test_opt(sbi, FASTBOOT))
1910                 seq_puts(seq, ",fastboot");
1911         if (test_opt(sbi, EXTENT_CACHE))
1912                 seq_puts(seq, ",extent_cache");
1913         else
1914                 seq_puts(seq, ",noextent_cache");
1915         if (test_opt(sbi, DATA_FLUSH))
1916                 seq_puts(seq, ",data_flush");
1917
1918         seq_puts(seq, ",mode=");
1919         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1920                 seq_puts(seq, "adaptive");
1921         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1922                 seq_puts(seq, "lfs");
1923         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
1924                 seq_puts(seq, "fragment:segment");
1925         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
1926                 seq_puts(seq, "fragment:block");
1927         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1928         if (test_opt(sbi, RESERVE_ROOT))
1929                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1930                                 F2FS_OPTION(sbi).root_reserved_blocks,
1931                                 from_kuid_munged(&init_user_ns,
1932                                         F2FS_OPTION(sbi).s_resuid),
1933                                 from_kgid_munged(&init_user_ns,
1934                                         F2FS_OPTION(sbi).s_resgid));
1935         if (F2FS_IO_SIZE_BITS(sbi))
1936                 seq_printf(seq, ",io_bits=%u",
1937                                 F2FS_OPTION(sbi).write_io_size_bits);
1938 #ifdef CONFIG_F2FS_FAULT_INJECTION
1939         if (test_opt(sbi, FAULT_INJECTION)) {
1940                 seq_printf(seq, ",fault_injection=%u",
1941                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1942                 seq_printf(seq, ",fault_type=%u",
1943                                 F2FS_OPTION(sbi).fault_info.inject_type);
1944         }
1945 #endif
1946 #ifdef CONFIG_QUOTA
1947         if (test_opt(sbi, QUOTA))
1948                 seq_puts(seq, ",quota");
1949         if (test_opt(sbi, USRQUOTA))
1950                 seq_puts(seq, ",usrquota");
1951         if (test_opt(sbi, GRPQUOTA))
1952                 seq_puts(seq, ",grpquota");
1953         if (test_opt(sbi, PRJQUOTA))
1954                 seq_puts(seq, ",prjquota");
1955 #endif
1956         f2fs_show_quota_options(seq, sbi->sb);
1957
1958         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1959
1960         if (sbi->sb->s_flags & SB_INLINECRYPT)
1961                 seq_puts(seq, ",inlinecrypt");
1962
1963         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1964                 seq_printf(seq, ",alloc_mode=%s", "default");
1965         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1966                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1967
1968         if (test_opt(sbi, DISABLE_CHECKPOINT))
1969                 seq_printf(seq, ",checkpoint=disable:%u",
1970                                 F2FS_OPTION(sbi).unusable_cap);
1971         if (test_opt(sbi, MERGE_CHECKPOINT))
1972                 seq_puts(seq, ",checkpoint_merge");
1973         else
1974                 seq_puts(seq, ",nocheckpoint_merge");
1975         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1976                 seq_printf(seq, ",fsync_mode=%s", "posix");
1977         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1978                 seq_printf(seq, ",fsync_mode=%s", "strict");
1979         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1980                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1981
1982 #ifdef CONFIG_F2FS_FS_COMPRESSION
1983         f2fs_show_compress_options(seq, sbi->sb);
1984 #endif
1985
1986         if (test_opt(sbi, ATGC))
1987                 seq_puts(seq, ",atgc");
1988
1989         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
1990                 seq_printf(seq, ",discard_unit=%s", "block");
1991         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
1992                 seq_printf(seq, ",discard_unit=%s", "segment");
1993         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
1994                 seq_printf(seq, ",discard_unit=%s", "section");
1995
1996         return 0;
1997 }
1998
1999 static void default_options(struct f2fs_sb_info *sbi)
2000 {
2001         /* init some FS parameters */
2002         if (f2fs_sb_has_readonly(sbi))
2003                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2004         else
2005                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2006
2007         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2008         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2009         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2010         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2011         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2012         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2013         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2014         F2FS_OPTION(sbi).compress_ext_cnt = 0;
2015         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2016         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2017
2018         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2019
2020         set_opt(sbi, INLINE_XATTR);
2021         set_opt(sbi, INLINE_DATA);
2022         set_opt(sbi, INLINE_DENTRY);
2023         set_opt(sbi, EXTENT_CACHE);
2024         set_opt(sbi, NOHEAP);
2025         clear_opt(sbi, DISABLE_CHECKPOINT);
2026         set_opt(sbi, MERGE_CHECKPOINT);
2027         F2FS_OPTION(sbi).unusable_cap = 0;
2028         sbi->sb->s_flags |= SB_LAZYTIME;
2029         set_opt(sbi, FLUSH_MERGE);
2030         if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2031                 set_opt(sbi, DISCARD);
2032         if (f2fs_sb_has_blkzoned(sbi)) {
2033                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2034                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2035         } else {
2036                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2037                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2038         }
2039
2040 #ifdef CONFIG_F2FS_FS_XATTR
2041         set_opt(sbi, XATTR_USER);
2042 #endif
2043 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2044         set_opt(sbi, POSIX_ACL);
2045 #endif
2046
2047         f2fs_build_fault_attr(sbi, 0, 0);
2048 }
2049
2050 #ifdef CONFIG_QUOTA
2051 static int f2fs_enable_quotas(struct super_block *sb);
2052 #endif
2053
2054 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2055 {
2056         unsigned int s_flags = sbi->sb->s_flags;
2057         struct cp_control cpc;
2058         unsigned int gc_mode;
2059         int err = 0;
2060         int ret;
2061         block_t unusable;
2062
2063         if (s_flags & SB_RDONLY) {
2064                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2065                 return -EINVAL;
2066         }
2067         sbi->sb->s_flags |= SB_ACTIVE;
2068
2069         f2fs_update_time(sbi, DISABLE_TIME);
2070
2071         gc_mode = sbi->gc_mode;
2072         sbi->gc_mode = GC_URGENT_HIGH;
2073
2074         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2075                 f2fs_down_write(&sbi->gc_lock);
2076                 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
2077                 if (err == -ENODATA) {
2078                         err = 0;
2079                         break;
2080                 }
2081                 if (err && err != -EAGAIN)
2082                         break;
2083         }
2084
2085         ret = sync_filesystem(sbi->sb);
2086         if (ret || err) {
2087                 err = ret ? ret : err;
2088                 goto restore_flag;
2089         }
2090
2091         unusable = f2fs_get_unusable_blocks(sbi);
2092         if (f2fs_disable_cp_again(sbi, unusable)) {
2093                 err = -EAGAIN;
2094                 goto restore_flag;
2095         }
2096
2097         f2fs_down_write(&sbi->gc_lock);
2098         cpc.reason = CP_PAUSE;
2099         set_sbi_flag(sbi, SBI_CP_DISABLED);
2100         err = f2fs_write_checkpoint(sbi, &cpc);
2101         if (err)
2102                 goto out_unlock;
2103
2104         spin_lock(&sbi->stat_lock);
2105         sbi->unusable_block_count = unusable;
2106         spin_unlock(&sbi->stat_lock);
2107
2108 out_unlock:
2109         f2fs_up_write(&sbi->gc_lock);
2110 restore_flag:
2111         sbi->gc_mode = gc_mode;
2112         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2113         return err;
2114 }
2115
2116 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2117 {
2118         int retry = DEFAULT_RETRY_IO_COUNT;
2119
2120         /* we should flush all the data to keep data consistency */
2121         do {
2122                 sync_inodes_sb(sbi->sb);
2123                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2124         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2125
2126         if (unlikely(retry < 0))
2127                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2128
2129         f2fs_down_write(&sbi->gc_lock);
2130         f2fs_dirty_to_prefree(sbi);
2131
2132         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2133         set_sbi_flag(sbi, SBI_IS_DIRTY);
2134         f2fs_up_write(&sbi->gc_lock);
2135
2136         f2fs_sync_fs(sbi->sb, 1);
2137 }
2138
2139 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2140 {
2141         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2142         struct f2fs_mount_info org_mount_opt;
2143         unsigned long old_sb_flags;
2144         int err;
2145         bool need_restart_gc = false, need_stop_gc = false;
2146         bool need_restart_ckpt = false, need_stop_ckpt = false;
2147         bool need_restart_flush = false, need_stop_flush = false;
2148         bool need_restart_discard = false, need_stop_discard = false;
2149         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2150         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2151         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2152         bool no_atgc = !test_opt(sbi, ATGC);
2153         bool no_discard = !test_opt(sbi, DISCARD);
2154         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2155         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2156         struct discard_cmd_control *dcc;
2157 #ifdef CONFIG_QUOTA
2158         int i, j;
2159 #endif
2160
2161         /*
2162          * Save the old mount options in case we
2163          * need to restore them.
2164          */
2165         org_mount_opt = sbi->mount_opt;
2166         old_sb_flags = sb->s_flags;
2167
2168 #ifdef CONFIG_QUOTA
2169         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2170         for (i = 0; i < MAXQUOTAS; i++) {
2171                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2172                         org_mount_opt.s_qf_names[i] =
2173                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2174                                 GFP_KERNEL);
2175                         if (!org_mount_opt.s_qf_names[i]) {
2176                                 for (j = 0; j < i; j++)
2177                                         kfree(org_mount_opt.s_qf_names[j]);
2178                                 return -ENOMEM;
2179                         }
2180                 } else {
2181                         org_mount_opt.s_qf_names[i] = NULL;
2182                 }
2183         }
2184 #endif
2185
2186         /* recover superblocks we couldn't write due to previous RO mount */
2187         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2188                 err = f2fs_commit_super(sbi, false);
2189                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2190                           err);
2191                 if (!err)
2192                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2193         }
2194
2195         default_options(sbi);
2196
2197         /* parse mount options */
2198         err = parse_options(sb, data, true);
2199         if (err)
2200                 goto restore_opts;
2201
2202         /*
2203          * Previous and new state of filesystem is RO,
2204          * so skip checking GC and FLUSH_MERGE conditions.
2205          */
2206         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2207                 goto skip;
2208
2209         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2210                 err = -EROFS;
2211                 goto restore_opts;
2212         }
2213
2214 #ifdef CONFIG_QUOTA
2215         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2216                 err = dquot_suspend(sb, -1);
2217                 if (err < 0)
2218                         goto restore_opts;
2219         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2220                 /* dquot_resume needs RW */
2221                 sb->s_flags &= ~SB_RDONLY;
2222                 if (sb_any_quota_suspended(sb)) {
2223                         dquot_resume(sb, -1);
2224                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2225                         err = f2fs_enable_quotas(sb);
2226                         if (err)
2227                                 goto restore_opts;
2228                 }
2229         }
2230 #endif
2231         /* disallow enable atgc dynamically */
2232         if (no_atgc == !!test_opt(sbi, ATGC)) {
2233                 err = -EINVAL;
2234                 f2fs_warn(sbi, "switch atgc option is not allowed");
2235                 goto restore_opts;
2236         }
2237
2238         /* disallow enable/disable extent_cache dynamically */
2239         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2240                 err = -EINVAL;
2241                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2242                 goto restore_opts;
2243         }
2244
2245         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2246                 err = -EINVAL;
2247                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2248                 goto restore_opts;
2249         }
2250
2251         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2252                 err = -EINVAL;
2253                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2254                 goto restore_opts;
2255         }
2256
2257         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2258                 err = -EINVAL;
2259                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2260                 goto restore_opts;
2261         }
2262
2263         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2264                 err = -EINVAL;
2265                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2266                 goto restore_opts;
2267         }
2268
2269         /*
2270          * We stop the GC thread if FS is mounted as RO
2271          * or if background_gc = off is passed in mount
2272          * option. Also sync the filesystem.
2273          */
2274         if ((*flags & SB_RDONLY) ||
2275                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2276                         !test_opt(sbi, GC_MERGE))) {
2277                 if (sbi->gc_thread) {
2278                         f2fs_stop_gc_thread(sbi);
2279                         need_restart_gc = true;
2280                 }
2281         } else if (!sbi->gc_thread) {
2282                 err = f2fs_start_gc_thread(sbi);
2283                 if (err)
2284                         goto restore_opts;
2285                 need_stop_gc = true;
2286         }
2287
2288         if (*flags & SB_RDONLY) {
2289                 sync_inodes_sb(sb);
2290
2291                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2292                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2293                 f2fs_sync_fs(sb, 1);
2294                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2295         }
2296
2297         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2298                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2299                 f2fs_stop_ckpt_thread(sbi);
2300                 need_restart_ckpt = true;
2301         } else {
2302                 err = f2fs_start_ckpt_thread(sbi);
2303                 if (err) {
2304                         f2fs_err(sbi,
2305                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2306                             err);
2307                         goto restore_gc;
2308                 }
2309                 need_stop_ckpt = true;
2310         }
2311
2312         /*
2313          * We stop issue flush thread if FS is mounted as RO
2314          * or if flush_merge is not passed in mount option.
2315          */
2316         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2317                 clear_opt(sbi, FLUSH_MERGE);
2318                 f2fs_destroy_flush_cmd_control(sbi, false);
2319                 need_restart_flush = true;
2320         } else {
2321                 err = f2fs_create_flush_cmd_control(sbi);
2322                 if (err)
2323                         goto restore_ckpt;
2324                 need_stop_flush = true;
2325         }
2326
2327         if (no_discard == !!test_opt(sbi, DISCARD)) {
2328                 if (test_opt(sbi, DISCARD)) {
2329                         err = f2fs_start_discard_thread(sbi);
2330                         if (err)
2331                                 goto restore_flush;
2332                         need_stop_discard = true;
2333                 } else {
2334                         dcc = SM_I(sbi)->dcc_info;
2335                         f2fs_stop_discard_thread(sbi);
2336                         if (atomic_read(&dcc->discard_cmd_cnt))
2337                                 f2fs_issue_discard_timeout(sbi);
2338                         need_restart_discard = true;
2339                 }
2340         }
2341
2342         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2343                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2344                         err = f2fs_disable_checkpoint(sbi);
2345                         if (err)
2346                                 goto restore_discard;
2347                 } else {
2348                         f2fs_enable_checkpoint(sbi);
2349                 }
2350         }
2351
2352 skip:
2353 #ifdef CONFIG_QUOTA
2354         /* Release old quota file names */
2355         for (i = 0; i < MAXQUOTAS; i++)
2356                 kfree(org_mount_opt.s_qf_names[i]);
2357 #endif
2358         /* Update the POSIXACL Flag */
2359         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2360                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2361
2362         limit_reserve_root(sbi);
2363         adjust_unusable_cap_perc(sbi);
2364         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2365         return 0;
2366 restore_discard:
2367         if (need_restart_discard) {
2368                 if (f2fs_start_discard_thread(sbi))
2369                         f2fs_warn(sbi, "discard has been stopped");
2370         } else if (need_stop_discard) {
2371                 f2fs_stop_discard_thread(sbi);
2372         }
2373 restore_flush:
2374         if (need_restart_flush) {
2375                 if (f2fs_create_flush_cmd_control(sbi))
2376                         f2fs_warn(sbi, "background flush thread has stopped");
2377         } else if (need_stop_flush) {
2378                 clear_opt(sbi, FLUSH_MERGE);
2379                 f2fs_destroy_flush_cmd_control(sbi, false);
2380         }
2381 restore_ckpt:
2382         if (need_restart_ckpt) {
2383                 if (f2fs_start_ckpt_thread(sbi))
2384                         f2fs_warn(sbi, "background ckpt thread has stopped");
2385         } else if (need_stop_ckpt) {
2386                 f2fs_stop_ckpt_thread(sbi);
2387         }
2388 restore_gc:
2389         if (need_restart_gc) {
2390                 if (f2fs_start_gc_thread(sbi))
2391                         f2fs_warn(sbi, "background gc thread has stopped");
2392         } else if (need_stop_gc) {
2393                 f2fs_stop_gc_thread(sbi);
2394         }
2395 restore_opts:
2396 #ifdef CONFIG_QUOTA
2397         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2398         for (i = 0; i < MAXQUOTAS; i++) {
2399                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2400                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2401         }
2402 #endif
2403         sbi->mount_opt = org_mount_opt;
2404         sb->s_flags = old_sb_flags;
2405         return err;
2406 }
2407
2408 #ifdef CONFIG_QUOTA
2409 /* Read data from quotafile */
2410 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2411                                size_t len, loff_t off)
2412 {
2413         struct inode *inode = sb_dqopt(sb)->files[type];
2414         struct address_space *mapping = inode->i_mapping;
2415         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2416         int offset = off & (sb->s_blocksize - 1);
2417         int tocopy;
2418         size_t toread;
2419         loff_t i_size = i_size_read(inode);
2420         struct page *page;
2421         char *kaddr;
2422
2423         if (off > i_size)
2424                 return 0;
2425
2426         if (off + len > i_size)
2427                 len = i_size - off;
2428         toread = len;
2429         while (toread > 0) {
2430                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2431 repeat:
2432                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2433                 if (IS_ERR(page)) {
2434                         if (PTR_ERR(page) == -ENOMEM) {
2435                                 memalloc_retry_wait(GFP_NOFS);
2436                                 goto repeat;
2437                         }
2438                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2439                         return PTR_ERR(page);
2440                 }
2441
2442                 lock_page(page);
2443
2444                 if (unlikely(page->mapping != mapping)) {
2445                         f2fs_put_page(page, 1);
2446                         goto repeat;
2447                 }
2448                 if (unlikely(!PageUptodate(page))) {
2449                         f2fs_put_page(page, 1);
2450                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2451                         return -EIO;
2452                 }
2453
2454                 kaddr = kmap_atomic(page);
2455                 memcpy(data, kaddr + offset, tocopy);
2456                 kunmap_atomic(kaddr);
2457                 f2fs_put_page(page, 1);
2458
2459                 offset = 0;
2460                 toread -= tocopy;
2461                 data += tocopy;
2462                 blkidx++;
2463         }
2464         return len;
2465 }
2466
2467 /* Write to quotafile */
2468 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2469                                 const char *data, size_t len, loff_t off)
2470 {
2471         struct inode *inode = sb_dqopt(sb)->files[type];
2472         struct address_space *mapping = inode->i_mapping;
2473         const struct address_space_operations *a_ops = mapping->a_ops;
2474         int offset = off & (sb->s_blocksize - 1);
2475         size_t towrite = len;
2476         struct page *page;
2477         void *fsdata = NULL;
2478         char *kaddr;
2479         int err = 0;
2480         int tocopy;
2481
2482         while (towrite > 0) {
2483                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2484                                                                 towrite);
2485 retry:
2486                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2487                                                         &page, &fsdata);
2488                 if (unlikely(err)) {
2489                         if (err == -ENOMEM) {
2490                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2491                                 goto retry;
2492                         }
2493                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2494                         break;
2495                 }
2496
2497                 kaddr = kmap_atomic(page);
2498                 memcpy(kaddr + offset, data, tocopy);
2499                 kunmap_atomic(kaddr);
2500                 flush_dcache_page(page);
2501
2502                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2503                                                 page, fsdata);
2504                 offset = 0;
2505                 towrite -= tocopy;
2506                 off += tocopy;
2507                 data += tocopy;
2508                 cond_resched();
2509         }
2510
2511         if (len == towrite)
2512                 return err;
2513         inode->i_mtime = inode->i_ctime = current_time(inode);
2514         f2fs_mark_inode_dirty_sync(inode, false);
2515         return len - towrite;
2516 }
2517
2518 int f2fs_dquot_initialize(struct inode *inode)
2519 {
2520         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2521                 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2522                 return -ESRCH;
2523         }
2524
2525         return dquot_initialize(inode);
2526 }
2527
2528 static struct dquot **f2fs_get_dquots(struct inode *inode)
2529 {
2530         return F2FS_I(inode)->i_dquot;
2531 }
2532
2533 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2534 {
2535         return &F2FS_I(inode)->i_reserved_quota;
2536 }
2537
2538 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2539 {
2540         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2541                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2542                 return 0;
2543         }
2544
2545         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2546                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2547 }
2548
2549 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2550 {
2551         int enabled = 0;
2552         int i, err;
2553
2554         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2555                 err = f2fs_enable_quotas(sbi->sb);
2556                 if (err) {
2557                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2558                         return 0;
2559                 }
2560                 return 1;
2561         }
2562
2563         for (i = 0; i < MAXQUOTAS; i++) {
2564                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2565                         err = f2fs_quota_on_mount(sbi, i);
2566                         if (!err) {
2567                                 enabled = 1;
2568                                 continue;
2569                         }
2570                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2571                                  err, i);
2572                 }
2573         }
2574         return enabled;
2575 }
2576
2577 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2578                              unsigned int flags)
2579 {
2580         struct inode *qf_inode;
2581         unsigned long qf_inum;
2582         int err;
2583
2584         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2585
2586         qf_inum = f2fs_qf_ino(sb, type);
2587         if (!qf_inum)
2588                 return -EPERM;
2589
2590         qf_inode = f2fs_iget(sb, qf_inum);
2591         if (IS_ERR(qf_inode)) {
2592                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2593                 return PTR_ERR(qf_inode);
2594         }
2595
2596         /* Don't account quota for quota files to avoid recursion */
2597         qf_inode->i_flags |= S_NOQUOTA;
2598         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2599         iput(qf_inode);
2600         return err;
2601 }
2602
2603 static int f2fs_enable_quotas(struct super_block *sb)
2604 {
2605         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2606         int type, err = 0;
2607         unsigned long qf_inum;
2608         bool quota_mopt[MAXQUOTAS] = {
2609                 test_opt(sbi, USRQUOTA),
2610                 test_opt(sbi, GRPQUOTA),
2611                 test_opt(sbi, PRJQUOTA),
2612         };
2613
2614         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2615                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2616                 return 0;
2617         }
2618
2619         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2620
2621         for (type = 0; type < MAXQUOTAS; type++) {
2622                 qf_inum = f2fs_qf_ino(sb, type);
2623                 if (qf_inum) {
2624                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2625                                 DQUOT_USAGE_ENABLED |
2626                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2627                         if (err) {
2628                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2629                                          type, err);
2630                                 for (type--; type >= 0; type--)
2631                                         dquot_quota_off(sb, type);
2632                                 set_sbi_flag(F2FS_SB(sb),
2633                                                 SBI_QUOTA_NEED_REPAIR);
2634                                 return err;
2635                         }
2636                 }
2637         }
2638         return 0;
2639 }
2640
2641 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2642 {
2643         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2644         struct address_space *mapping = dqopt->files[type]->i_mapping;
2645         int ret = 0;
2646
2647         ret = dquot_writeback_dquots(sbi->sb, type);
2648         if (ret)
2649                 goto out;
2650
2651         ret = filemap_fdatawrite(mapping);
2652         if (ret)
2653                 goto out;
2654
2655         /* if we are using journalled quota */
2656         if (is_journalled_quota(sbi))
2657                 goto out;
2658
2659         ret = filemap_fdatawait(mapping);
2660
2661         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2662 out:
2663         if (ret)
2664                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2665         return ret;
2666 }
2667
2668 int f2fs_quota_sync(struct super_block *sb, int type)
2669 {
2670         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2671         struct quota_info *dqopt = sb_dqopt(sb);
2672         int cnt;
2673         int ret = 0;
2674
2675         /*
2676          * Now when everything is written we can discard the pagecache so
2677          * that userspace sees the changes.
2678          */
2679         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2680
2681                 if (type != -1 && cnt != type)
2682                         continue;
2683
2684                 if (!sb_has_quota_active(sb, cnt))
2685                         continue;
2686
2687                 inode_lock(dqopt->files[cnt]);
2688
2689                 /*
2690                  * do_quotactl
2691                  *  f2fs_quota_sync
2692                  *  f2fs_down_read(quota_sem)
2693                  *  dquot_writeback_dquots()
2694                  *  f2fs_dquot_commit
2695                  *                            block_operation
2696                  *                            f2fs_down_read(quota_sem)
2697                  */
2698                 f2fs_lock_op(sbi);
2699                 f2fs_down_read(&sbi->quota_sem);
2700
2701                 ret = f2fs_quota_sync_file(sbi, cnt);
2702
2703                 f2fs_up_read(&sbi->quota_sem);
2704                 f2fs_unlock_op(sbi);
2705
2706                 inode_unlock(dqopt->files[cnt]);
2707
2708                 if (ret)
2709                         break;
2710         }
2711         return ret;
2712 }
2713
2714 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2715                                                         const struct path *path)
2716 {
2717         struct inode *inode;
2718         int err;
2719
2720         /* if quota sysfile exists, deny enabling quota with specific file */
2721         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2722                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2723                 return -EBUSY;
2724         }
2725
2726         err = f2fs_quota_sync(sb, type);
2727         if (err)
2728                 return err;
2729
2730         err = dquot_quota_on(sb, type, format_id, path);
2731         if (err)
2732                 return err;
2733
2734         inode = d_inode(path->dentry);
2735
2736         inode_lock(inode);
2737         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2738         f2fs_set_inode_flags(inode);
2739         inode_unlock(inode);
2740         f2fs_mark_inode_dirty_sync(inode, false);
2741
2742         return 0;
2743 }
2744
2745 static int __f2fs_quota_off(struct super_block *sb, int type)
2746 {
2747         struct inode *inode = sb_dqopt(sb)->files[type];
2748         int err;
2749
2750         if (!inode || !igrab(inode))
2751                 return dquot_quota_off(sb, type);
2752
2753         err = f2fs_quota_sync(sb, type);
2754         if (err)
2755                 goto out_put;
2756
2757         err = dquot_quota_off(sb, type);
2758         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2759                 goto out_put;
2760
2761         inode_lock(inode);
2762         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2763         f2fs_set_inode_flags(inode);
2764         inode_unlock(inode);
2765         f2fs_mark_inode_dirty_sync(inode, false);
2766 out_put:
2767         iput(inode);
2768         return err;
2769 }
2770
2771 static int f2fs_quota_off(struct super_block *sb, int type)
2772 {
2773         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2774         int err;
2775
2776         err = __f2fs_quota_off(sb, type);
2777
2778         /*
2779          * quotactl can shutdown journalled quota, result in inconsistence
2780          * between quota record and fs data by following updates, tag the
2781          * flag to let fsck be aware of it.
2782          */
2783         if (is_journalled_quota(sbi))
2784                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2785         return err;
2786 }
2787
2788 void f2fs_quota_off_umount(struct super_block *sb)
2789 {
2790         int type;
2791         int err;
2792
2793         for (type = 0; type < MAXQUOTAS; type++) {
2794                 err = __f2fs_quota_off(sb, type);
2795                 if (err) {
2796                         int ret = dquot_quota_off(sb, type);
2797
2798                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2799                                  type, err, ret);
2800                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2801                 }
2802         }
2803         /*
2804          * In case of checkpoint=disable, we must flush quota blocks.
2805          * This can cause NULL exception for node_inode in end_io, since
2806          * put_super already dropped it.
2807          */
2808         sync_filesystem(sb);
2809 }
2810
2811 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2812 {
2813         struct quota_info *dqopt = sb_dqopt(sb);
2814         int type;
2815
2816         for (type = 0; type < MAXQUOTAS; type++) {
2817                 if (!dqopt->files[type])
2818                         continue;
2819                 f2fs_inode_synced(dqopt->files[type]);
2820         }
2821 }
2822
2823 static int f2fs_dquot_commit(struct dquot *dquot)
2824 {
2825         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2826         int ret;
2827
2828         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2829         ret = dquot_commit(dquot);
2830         if (ret < 0)
2831                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2832         f2fs_up_read(&sbi->quota_sem);
2833         return ret;
2834 }
2835
2836 static int f2fs_dquot_acquire(struct dquot *dquot)
2837 {
2838         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2839         int ret;
2840
2841         f2fs_down_read(&sbi->quota_sem);
2842         ret = dquot_acquire(dquot);
2843         if (ret < 0)
2844                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2845         f2fs_up_read(&sbi->quota_sem);
2846         return ret;
2847 }
2848
2849 static int f2fs_dquot_release(struct dquot *dquot)
2850 {
2851         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2852         int ret = dquot_release(dquot);
2853
2854         if (ret < 0)
2855                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2856         return ret;
2857 }
2858
2859 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2860 {
2861         struct super_block *sb = dquot->dq_sb;
2862         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2863         int ret = dquot_mark_dquot_dirty(dquot);
2864
2865         /* if we are using journalled quota */
2866         if (is_journalled_quota(sbi))
2867                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2868
2869         return ret;
2870 }
2871
2872 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2873 {
2874         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2875         int ret = dquot_commit_info(sb, type);
2876
2877         if (ret < 0)
2878                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2879         return ret;
2880 }
2881
2882 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2883 {
2884         *projid = F2FS_I(inode)->i_projid;
2885         return 0;
2886 }
2887
2888 static const struct dquot_operations f2fs_quota_operations = {
2889         .get_reserved_space = f2fs_get_reserved_space,
2890         .write_dquot    = f2fs_dquot_commit,
2891         .acquire_dquot  = f2fs_dquot_acquire,
2892         .release_dquot  = f2fs_dquot_release,
2893         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2894         .write_info     = f2fs_dquot_commit_info,
2895         .alloc_dquot    = dquot_alloc,
2896         .destroy_dquot  = dquot_destroy,
2897         .get_projid     = f2fs_get_projid,
2898         .get_next_id    = dquot_get_next_id,
2899 };
2900
2901 static const struct quotactl_ops f2fs_quotactl_ops = {
2902         .quota_on       = f2fs_quota_on,
2903         .quota_off      = f2fs_quota_off,
2904         .quota_sync     = f2fs_quota_sync,
2905         .get_state      = dquot_get_state,
2906         .set_info       = dquot_set_dqinfo,
2907         .get_dqblk      = dquot_get_dqblk,
2908         .set_dqblk      = dquot_set_dqblk,
2909         .get_nextdqblk  = dquot_get_next_dqblk,
2910 };
2911 #else
2912 int f2fs_dquot_initialize(struct inode *inode)
2913 {
2914         return 0;
2915 }
2916
2917 int f2fs_quota_sync(struct super_block *sb, int type)
2918 {
2919         return 0;
2920 }
2921
2922 void f2fs_quota_off_umount(struct super_block *sb)
2923 {
2924 }
2925 #endif
2926
2927 static const struct super_operations f2fs_sops = {
2928         .alloc_inode    = f2fs_alloc_inode,
2929         .free_inode     = f2fs_free_inode,
2930         .drop_inode     = f2fs_drop_inode,
2931         .write_inode    = f2fs_write_inode,
2932         .dirty_inode    = f2fs_dirty_inode,
2933         .show_options   = f2fs_show_options,
2934 #ifdef CONFIG_QUOTA
2935         .quota_read     = f2fs_quota_read,
2936         .quota_write    = f2fs_quota_write,
2937         .get_dquots     = f2fs_get_dquots,
2938 #endif
2939         .evict_inode    = f2fs_evict_inode,
2940         .put_super      = f2fs_put_super,
2941         .sync_fs        = f2fs_sync_fs,
2942         .freeze_fs      = f2fs_freeze,
2943         .unfreeze_fs    = f2fs_unfreeze,
2944         .statfs         = f2fs_statfs,
2945         .remount_fs     = f2fs_remount,
2946 };
2947
2948 #ifdef CONFIG_FS_ENCRYPTION
2949 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2950 {
2951         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2952                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2953                                 ctx, len, NULL);
2954 }
2955
2956 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2957                                                         void *fs_data)
2958 {
2959         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2960
2961         /*
2962          * Encrypting the root directory is not allowed because fsck
2963          * expects lost+found directory to exist and remain unencrypted
2964          * if LOST_FOUND feature is enabled.
2965          *
2966          */
2967         if (f2fs_sb_has_lost_found(sbi) &&
2968                         inode->i_ino == F2FS_ROOT_INO(sbi))
2969                 return -EPERM;
2970
2971         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2972                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2973                                 ctx, len, fs_data, XATTR_CREATE);
2974 }
2975
2976 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2977 {
2978         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2979 }
2980
2981 static bool f2fs_has_stable_inodes(struct super_block *sb)
2982 {
2983         return true;
2984 }
2985
2986 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2987                                        int *ino_bits_ret, int *lblk_bits_ret)
2988 {
2989         *ino_bits_ret = 8 * sizeof(nid_t);
2990         *lblk_bits_ret = 8 * sizeof(block_t);
2991 }
2992
2993 static int f2fs_get_num_devices(struct super_block *sb)
2994 {
2995         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2996
2997         if (f2fs_is_multi_device(sbi))
2998                 return sbi->s_ndevs;
2999         return 1;
3000 }
3001
3002 static void f2fs_get_devices(struct super_block *sb,
3003                              struct request_queue **devs)
3004 {
3005         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3006         int i;
3007
3008         for (i = 0; i < sbi->s_ndevs; i++)
3009                 devs[i] = bdev_get_queue(FDEV(i).bdev);
3010 }
3011
3012 static const struct fscrypt_operations f2fs_cryptops = {
3013         .key_prefix             = "f2fs:",
3014         .get_context            = f2fs_get_context,
3015         .set_context            = f2fs_set_context,
3016         .get_dummy_policy       = f2fs_get_dummy_policy,
3017         .empty_dir              = f2fs_empty_dir,
3018         .has_stable_inodes      = f2fs_has_stable_inodes,
3019         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3020         .get_num_devices        = f2fs_get_num_devices,
3021         .get_devices            = f2fs_get_devices,
3022 };
3023 #endif
3024
3025 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3026                 u64 ino, u32 generation)
3027 {
3028         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3029         struct inode *inode;
3030
3031         if (f2fs_check_nid_range(sbi, ino))
3032                 return ERR_PTR(-ESTALE);
3033
3034         /*
3035          * f2fs_iget isn't quite right if the inode is currently unallocated!
3036          * However f2fs_iget currently does appropriate checks to handle stale
3037          * inodes so everything is OK.
3038          */
3039         inode = f2fs_iget(sb, ino);
3040         if (IS_ERR(inode))
3041                 return ERR_CAST(inode);
3042         if (unlikely(generation && inode->i_generation != generation)) {
3043                 /* we didn't find the right inode.. */
3044                 iput(inode);
3045                 return ERR_PTR(-ESTALE);
3046         }
3047         return inode;
3048 }
3049
3050 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3051                 int fh_len, int fh_type)
3052 {
3053         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3054                                     f2fs_nfs_get_inode);
3055 }
3056
3057 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3058                 int fh_len, int fh_type)
3059 {
3060         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3061                                     f2fs_nfs_get_inode);
3062 }
3063
3064 static const struct export_operations f2fs_export_ops = {
3065         .fh_to_dentry = f2fs_fh_to_dentry,
3066         .fh_to_parent = f2fs_fh_to_parent,
3067         .get_parent = f2fs_get_parent,
3068 };
3069
3070 loff_t max_file_blocks(struct inode *inode)
3071 {
3072         loff_t result = 0;
3073         loff_t leaf_count;
3074
3075         /*
3076          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3077          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3078          * space in inode.i_addr, it will be more safe to reassign
3079          * result as zero.
3080          */
3081
3082         if (inode && f2fs_compressed_file(inode))
3083                 leaf_count = ADDRS_PER_BLOCK(inode);
3084         else
3085                 leaf_count = DEF_ADDRS_PER_BLOCK;
3086
3087         /* two direct node blocks */
3088         result += (leaf_count * 2);
3089
3090         /* two indirect node blocks */
3091         leaf_count *= NIDS_PER_BLOCK;
3092         result += (leaf_count * 2);
3093
3094         /* one double indirect node block */
3095         leaf_count *= NIDS_PER_BLOCK;
3096         result += leaf_count;
3097
3098         return result;
3099 }
3100
3101 static int __f2fs_commit_super(struct buffer_head *bh,
3102                         struct f2fs_super_block *super)
3103 {
3104         lock_buffer(bh);
3105         if (super)
3106                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3107         set_buffer_dirty(bh);
3108         unlock_buffer(bh);
3109
3110         /* it's rare case, we can do fua all the time */
3111         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3112 }
3113
3114 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3115                                         struct buffer_head *bh)
3116 {
3117         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3118                                         (bh->b_data + F2FS_SUPER_OFFSET);
3119         struct super_block *sb = sbi->sb;
3120         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3121         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3122         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3123         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3124         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3125         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3126         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3127         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3128         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3129         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3130         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3131         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3132         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3133         u64 main_end_blkaddr = main_blkaddr +
3134                                 (segment_count_main << log_blocks_per_seg);
3135         u64 seg_end_blkaddr = segment0_blkaddr +
3136                                 (segment_count << log_blocks_per_seg);
3137
3138         if (segment0_blkaddr != cp_blkaddr) {
3139                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3140                           segment0_blkaddr, cp_blkaddr);
3141                 return true;
3142         }
3143
3144         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3145                                                         sit_blkaddr) {
3146                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3147                           cp_blkaddr, sit_blkaddr,
3148                           segment_count_ckpt << log_blocks_per_seg);
3149                 return true;
3150         }
3151
3152         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3153                                                         nat_blkaddr) {
3154                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3155                           sit_blkaddr, nat_blkaddr,
3156                           segment_count_sit << log_blocks_per_seg);
3157                 return true;
3158         }
3159
3160         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3161                                                         ssa_blkaddr) {
3162                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3163                           nat_blkaddr, ssa_blkaddr,
3164                           segment_count_nat << log_blocks_per_seg);
3165                 return true;
3166         }
3167
3168         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3169                                                         main_blkaddr) {
3170                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3171                           ssa_blkaddr, main_blkaddr,
3172                           segment_count_ssa << log_blocks_per_seg);
3173                 return true;
3174         }
3175
3176         if (main_end_blkaddr > seg_end_blkaddr) {
3177                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3178                           main_blkaddr, seg_end_blkaddr,
3179                           segment_count_main << log_blocks_per_seg);
3180                 return true;
3181         } else if (main_end_blkaddr < seg_end_blkaddr) {
3182                 int err = 0;
3183                 char *res;
3184
3185                 /* fix in-memory information all the time */
3186                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3187                                 segment0_blkaddr) >> log_blocks_per_seg);
3188
3189                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3190                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3191                         res = "internally";
3192                 } else {
3193                         err = __f2fs_commit_super(bh, NULL);
3194                         res = err ? "failed" : "done";
3195                 }
3196                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3197                           res, main_blkaddr, seg_end_blkaddr,
3198                           segment_count_main << log_blocks_per_seg);
3199                 if (err)
3200                         return true;
3201         }
3202         return false;
3203 }
3204
3205 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3206                                 struct buffer_head *bh)
3207 {
3208         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3209         block_t total_sections, blocks_per_seg;
3210         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3211                                         (bh->b_data + F2FS_SUPER_OFFSET);
3212         size_t crc_offset = 0;
3213         __u32 crc = 0;
3214
3215         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3216                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3217                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3218                 return -EINVAL;
3219         }
3220
3221         /* Check checksum_offset and crc in superblock */
3222         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3223                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3224                 if (crc_offset !=
3225                         offsetof(struct f2fs_super_block, crc)) {
3226                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3227                                   crc_offset);
3228                         return -EFSCORRUPTED;
3229                 }
3230                 crc = le32_to_cpu(raw_super->crc);
3231                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3232                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3233                         return -EFSCORRUPTED;
3234                 }
3235         }
3236
3237         /* Currently, support only 4KB block size */
3238         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3239                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3240                           le32_to_cpu(raw_super->log_blocksize),
3241                           F2FS_BLKSIZE_BITS);
3242                 return -EFSCORRUPTED;
3243         }
3244
3245         /* check log blocks per segment */
3246         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3247                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3248                           le32_to_cpu(raw_super->log_blocks_per_seg));
3249                 return -EFSCORRUPTED;
3250         }
3251
3252         /* Currently, support 512/1024/2048/4096 bytes sector size */
3253         if (le32_to_cpu(raw_super->log_sectorsize) >
3254                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3255                 le32_to_cpu(raw_super->log_sectorsize) <
3256                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3257                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3258                           le32_to_cpu(raw_super->log_sectorsize));
3259                 return -EFSCORRUPTED;
3260         }
3261         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3262                 le32_to_cpu(raw_super->log_sectorsize) !=
3263                         F2FS_MAX_LOG_SECTOR_SIZE) {
3264                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3265                           le32_to_cpu(raw_super->log_sectors_per_block),
3266                           le32_to_cpu(raw_super->log_sectorsize));
3267                 return -EFSCORRUPTED;
3268         }
3269
3270         segment_count = le32_to_cpu(raw_super->segment_count);
3271         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3272         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3273         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3274         total_sections = le32_to_cpu(raw_super->section_count);
3275
3276         /* blocks_per_seg should be 512, given the above check */
3277         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3278
3279         if (segment_count > F2FS_MAX_SEGMENT ||
3280                                 segment_count < F2FS_MIN_SEGMENTS) {
3281                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3282                 return -EFSCORRUPTED;
3283         }
3284
3285         if (total_sections > segment_count_main || total_sections < 1 ||
3286                         segs_per_sec > segment_count || !segs_per_sec) {
3287                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3288                           segment_count, total_sections, segs_per_sec);
3289                 return -EFSCORRUPTED;
3290         }
3291
3292         if (segment_count_main != total_sections * segs_per_sec) {
3293                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3294                           segment_count_main, total_sections, segs_per_sec);
3295                 return -EFSCORRUPTED;
3296         }
3297
3298         if ((segment_count / segs_per_sec) < total_sections) {
3299                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3300                           segment_count, segs_per_sec, total_sections);
3301                 return -EFSCORRUPTED;
3302         }
3303
3304         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3305                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3306                           segment_count, le64_to_cpu(raw_super->block_count));
3307                 return -EFSCORRUPTED;
3308         }
3309
3310         if (RDEV(0).path[0]) {
3311                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3312                 int i = 1;
3313
3314                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3315                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3316                         i++;
3317                 }
3318                 if (segment_count != dev_seg_count) {
3319                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3320                                         segment_count, dev_seg_count);
3321                         return -EFSCORRUPTED;
3322                 }
3323         } else {
3324                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3325                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3326                         f2fs_info(sbi, "Zoned block device path is missing");
3327                         return -EFSCORRUPTED;
3328                 }
3329         }
3330
3331         if (secs_per_zone > total_sections || !secs_per_zone) {
3332                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3333                           secs_per_zone, total_sections);
3334                 return -EFSCORRUPTED;
3335         }
3336         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3337                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3338                         (le32_to_cpu(raw_super->extension_count) +
3339                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3340                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3341                           le32_to_cpu(raw_super->extension_count),
3342                           raw_super->hot_ext_count,
3343                           F2FS_MAX_EXTENSION);
3344                 return -EFSCORRUPTED;
3345         }
3346
3347         if (le32_to_cpu(raw_super->cp_payload) >=
3348                                 (blocks_per_seg - F2FS_CP_PACKS -
3349                                 NR_CURSEG_PERSIST_TYPE)) {
3350                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3351                           le32_to_cpu(raw_super->cp_payload),
3352                           blocks_per_seg - F2FS_CP_PACKS -
3353                           NR_CURSEG_PERSIST_TYPE);
3354                 return -EFSCORRUPTED;
3355         }
3356
3357         /* check reserved ino info */
3358         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3359                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3360                 le32_to_cpu(raw_super->root_ino) != 3) {
3361                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3362                           le32_to_cpu(raw_super->node_ino),
3363                           le32_to_cpu(raw_super->meta_ino),
3364                           le32_to_cpu(raw_super->root_ino));
3365                 return -EFSCORRUPTED;
3366         }
3367
3368         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3369         if (sanity_check_area_boundary(sbi, bh))
3370                 return -EFSCORRUPTED;
3371
3372         return 0;
3373 }
3374
3375 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3376 {
3377         unsigned int total, fsmeta;
3378         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3379         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3380         unsigned int ovp_segments, reserved_segments;
3381         unsigned int main_segs, blocks_per_seg;
3382         unsigned int sit_segs, nat_segs;
3383         unsigned int sit_bitmap_size, nat_bitmap_size;
3384         unsigned int log_blocks_per_seg;
3385         unsigned int segment_count_main;
3386         unsigned int cp_pack_start_sum, cp_payload;
3387         block_t user_block_count, valid_user_blocks;
3388         block_t avail_node_count, valid_node_count;
3389         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3390         int i, j;
3391
3392         total = le32_to_cpu(raw_super->segment_count);
3393         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3394         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3395         fsmeta += sit_segs;
3396         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3397         fsmeta += nat_segs;
3398         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3399         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3400
3401         if (unlikely(fsmeta >= total))
3402                 return 1;
3403
3404         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3405         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3406
3407         if (!f2fs_sb_has_readonly(sbi) &&
3408                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3409                         ovp_segments == 0 || reserved_segments == 0)) {
3410                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3411                 return 1;
3412         }
3413         user_block_count = le64_to_cpu(ckpt->user_block_count);
3414         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3415                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3416         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3417         if (!user_block_count || user_block_count >=
3418                         segment_count_main << log_blocks_per_seg) {
3419                 f2fs_err(sbi, "Wrong user_block_count: %u",
3420                          user_block_count);
3421                 return 1;
3422         }
3423
3424         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3425         if (valid_user_blocks > user_block_count) {
3426                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3427                          valid_user_blocks, user_block_count);
3428                 return 1;
3429         }
3430
3431         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3432         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3433         if (valid_node_count > avail_node_count) {
3434                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3435                          valid_node_count, avail_node_count);
3436                 return 1;
3437         }
3438
3439         main_segs = le32_to_cpu(raw_super->segment_count_main);
3440         blocks_per_seg = sbi->blocks_per_seg;
3441
3442         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3443                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3444                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3445                         return 1;
3446
3447                 if (f2fs_sb_has_readonly(sbi))
3448                         goto check_data;
3449
3450                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3451                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3452                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3453                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3454                                          i, j,
3455                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3456                                 return 1;
3457                         }
3458                 }
3459         }
3460 check_data:
3461         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3462                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3463                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3464                         return 1;
3465
3466                 if (f2fs_sb_has_readonly(sbi))
3467                         goto skip_cross;
3468
3469                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3470                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3471                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3472                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3473                                          i, j,
3474                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3475                                 return 1;
3476                         }
3477                 }
3478         }
3479         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3480                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3481                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3482                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3483                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3484                                          i, j,
3485                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3486                                 return 1;
3487                         }
3488                 }
3489         }
3490 skip_cross:
3491         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3492         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3493
3494         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3495                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3496                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3497                          sit_bitmap_size, nat_bitmap_size);
3498                 return 1;
3499         }
3500
3501         cp_pack_start_sum = __start_sum_addr(sbi);
3502         cp_payload = __cp_payload(sbi);
3503         if (cp_pack_start_sum < cp_payload + 1 ||
3504                 cp_pack_start_sum > blocks_per_seg - 1 -
3505                         NR_CURSEG_PERSIST_TYPE) {
3506                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3507                          cp_pack_start_sum);
3508                 return 1;
3509         }
3510
3511         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3512                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3513                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3514                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3515                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3516                           le32_to_cpu(ckpt->checksum_offset));
3517                 return 1;
3518         }
3519
3520         nat_blocks = nat_segs << log_blocks_per_seg;
3521         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3522         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3523         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3524                 (cp_payload + F2FS_CP_PACKS +
3525                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3526                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3527                           cp_payload, nat_bits_blocks);
3528                 return 1;
3529         }
3530
3531         if (unlikely(f2fs_cp_error(sbi))) {
3532                 f2fs_err(sbi, "A bug case: need to run fsck");
3533                 return 1;
3534         }
3535         return 0;
3536 }
3537
3538 static void init_sb_info(struct f2fs_sb_info *sbi)
3539 {
3540         struct f2fs_super_block *raw_super = sbi->raw_super;
3541         int i;
3542
3543         sbi->log_sectors_per_block =
3544                 le32_to_cpu(raw_super->log_sectors_per_block);
3545         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3546         sbi->blocksize = 1 << sbi->log_blocksize;
3547         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3548         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3549         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3550         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3551         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3552         sbi->total_node_count =
3553                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3554                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3555         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3556         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3557         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3558         sbi->cur_victim_sec = NULL_SECNO;
3559         sbi->gc_mode = GC_NORMAL;
3560         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3561         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3562         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3563         sbi->migration_granularity = sbi->segs_per_sec;
3564         sbi->seq_file_ra_mul = MIN_RA_MUL;
3565         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3566         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3567         spin_lock_init(&sbi->gc_urgent_high_lock);
3568
3569         sbi->dir_level = DEF_DIR_LEVEL;
3570         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3571         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3572         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3573         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3574         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3575         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3576                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3577         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3578
3579         for (i = 0; i < NR_COUNT_TYPE; i++)
3580                 atomic_set(&sbi->nr_pages[i], 0);
3581
3582         for (i = 0; i < META; i++)
3583                 atomic_set(&sbi->wb_sync_req[i], 0);
3584
3585         INIT_LIST_HEAD(&sbi->s_list);
3586         mutex_init(&sbi->umount_mutex);
3587         init_f2fs_rwsem(&sbi->io_order_lock);
3588         spin_lock_init(&sbi->cp_lock);
3589
3590         sbi->dirty_device = 0;
3591         spin_lock_init(&sbi->dev_lock);
3592
3593         init_f2fs_rwsem(&sbi->sb_lock);
3594         init_f2fs_rwsem(&sbi->pin_sem);
3595 }
3596
3597 static int init_percpu_info(struct f2fs_sb_info *sbi)
3598 {
3599         int err;
3600
3601         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3602         if (err)
3603                 return err;
3604
3605         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3606         if (err)
3607                 goto err_valid_block;
3608
3609         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3610                                                                 GFP_KERNEL);
3611         if (err)
3612                 goto err_node_block;
3613         return 0;
3614
3615 err_node_block:
3616         percpu_counter_destroy(&sbi->rf_node_block_count);
3617 err_valid_block:
3618         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3619         return err;
3620 }
3621
3622 #ifdef CONFIG_BLK_DEV_ZONED
3623
3624 struct f2fs_report_zones_args {
3625         struct f2fs_dev_info *dev;
3626         bool zone_cap_mismatch;
3627 };
3628
3629 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3630                               void *data)
3631 {
3632         struct f2fs_report_zones_args *rz_args = data;
3633
3634         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3635                 return 0;
3636
3637         set_bit(idx, rz_args->dev->blkz_seq);
3638         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3639                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3640         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3641                 rz_args->zone_cap_mismatch = true;
3642
3643         return 0;
3644 }
3645
3646 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3647 {
3648         struct block_device *bdev = FDEV(devi).bdev;
3649         sector_t nr_sectors = bdev_nr_sectors(bdev);
3650         struct f2fs_report_zones_args rep_zone_arg;
3651         int ret;
3652
3653         if (!f2fs_sb_has_blkzoned(sbi))
3654                 return 0;
3655
3656         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3657                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3658                 return -EINVAL;
3659         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3660         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3661                                 __ilog2_u32(sbi->blocks_per_blkz))
3662                 return -EINVAL;
3663         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3664         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3665                                         sbi->log_blocks_per_blkz;
3666         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3667                 FDEV(devi).nr_blkz++;
3668
3669         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3670                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3671                                         * sizeof(unsigned long),
3672                                         GFP_KERNEL);
3673         if (!FDEV(devi).blkz_seq)
3674                 return -ENOMEM;
3675
3676         /* Get block zones type and zone-capacity */
3677         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3678                                         FDEV(devi).nr_blkz * sizeof(block_t),
3679                                         GFP_KERNEL);
3680         if (!FDEV(devi).zone_capacity_blocks)
3681                 return -ENOMEM;
3682
3683         rep_zone_arg.dev = &FDEV(devi);
3684         rep_zone_arg.zone_cap_mismatch = false;
3685
3686         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3687                                   &rep_zone_arg);
3688         if (ret < 0)
3689                 return ret;
3690
3691         if (!rep_zone_arg.zone_cap_mismatch) {
3692                 kfree(FDEV(devi).zone_capacity_blocks);
3693                 FDEV(devi).zone_capacity_blocks = NULL;
3694         }
3695
3696         return 0;
3697 }
3698 #endif
3699
3700 /*
3701  * Read f2fs raw super block.
3702  * Because we have two copies of super block, so read both of them
3703  * to get the first valid one. If any one of them is broken, we pass
3704  * them recovery flag back to the caller.
3705  */
3706 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3707                         struct f2fs_super_block **raw_super,
3708                         int *valid_super_block, int *recovery)
3709 {
3710         struct super_block *sb = sbi->sb;
3711         int block;
3712         struct buffer_head *bh;
3713         struct f2fs_super_block *super;
3714         int err = 0;
3715
3716         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3717         if (!super)
3718                 return -ENOMEM;
3719
3720         for (block = 0; block < 2; block++) {
3721                 bh = sb_bread(sb, block);
3722                 if (!bh) {
3723                         f2fs_err(sbi, "Unable to read %dth superblock",
3724                                  block + 1);
3725                         err = -EIO;
3726                         *recovery = 1;
3727                         continue;
3728                 }
3729
3730                 /* sanity checking of raw super */
3731                 err = sanity_check_raw_super(sbi, bh);
3732                 if (err) {
3733                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3734                                  block + 1);
3735                         brelse(bh);
3736                         *recovery = 1;
3737                         continue;
3738                 }
3739
3740                 if (!*raw_super) {
3741                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3742                                                         sizeof(*super));
3743                         *valid_super_block = block;
3744                         *raw_super = super;
3745                 }
3746                 brelse(bh);
3747         }
3748
3749         /* No valid superblock */
3750         if (!*raw_super)
3751                 kfree(super);
3752         else
3753                 err = 0;
3754
3755         return err;
3756 }
3757
3758 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3759 {
3760         struct buffer_head *bh;
3761         __u32 crc = 0;
3762         int err;
3763
3764         if ((recover && f2fs_readonly(sbi->sb)) ||
3765                                 bdev_read_only(sbi->sb->s_bdev)) {
3766                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3767                 return -EROFS;
3768         }
3769
3770         /* we should update superblock crc here */
3771         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3772                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3773                                 offsetof(struct f2fs_super_block, crc));
3774                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3775         }
3776
3777         /* write back-up superblock first */
3778         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3779         if (!bh)
3780                 return -EIO;
3781         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3782         brelse(bh);
3783
3784         /* if we are in recovery path, skip writing valid superblock */
3785         if (recover || err)
3786                 return err;
3787
3788         /* write current valid superblock */
3789         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3790         if (!bh)
3791                 return -EIO;
3792         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3793         brelse(bh);
3794         return err;
3795 }
3796
3797 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3798 {
3799         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3800         unsigned int max_devices = MAX_DEVICES;
3801         unsigned int logical_blksize;
3802         int i;
3803
3804         /* Initialize single device information */
3805         if (!RDEV(0).path[0]) {
3806                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3807                         return 0;
3808                 max_devices = 1;
3809         }
3810
3811         /*
3812          * Initialize multiple devices information, or single
3813          * zoned block device information.
3814          */
3815         sbi->devs = f2fs_kzalloc(sbi,
3816                                  array_size(max_devices,
3817                                             sizeof(struct f2fs_dev_info)),
3818                                  GFP_KERNEL);
3819         if (!sbi->devs)
3820                 return -ENOMEM;
3821
3822         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3823         sbi->aligned_blksize = true;
3824
3825         for (i = 0; i < max_devices; i++) {
3826
3827                 if (i > 0 && !RDEV(i).path[0])
3828                         break;
3829
3830                 if (max_devices == 1) {
3831                         /* Single zoned block device mount */
3832                         FDEV(0).bdev =
3833                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3834                                         sbi->sb->s_mode, sbi->sb->s_type);
3835                 } else {
3836                         /* Multi-device mount */
3837                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3838                         FDEV(i).total_segments =
3839                                 le32_to_cpu(RDEV(i).total_segments);
3840                         if (i == 0) {
3841                                 FDEV(i).start_blk = 0;
3842                                 FDEV(i).end_blk = FDEV(i).start_blk +
3843                                     (FDEV(i).total_segments <<
3844                                     sbi->log_blocks_per_seg) - 1 +
3845                                     le32_to_cpu(raw_super->segment0_blkaddr);
3846                         } else {
3847                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3848                                 FDEV(i).end_blk = FDEV(i).start_blk +
3849                                         (FDEV(i).total_segments <<
3850                                         sbi->log_blocks_per_seg) - 1;
3851                         }
3852                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3853                                         sbi->sb->s_mode, sbi->sb->s_type);
3854                 }
3855                 if (IS_ERR(FDEV(i).bdev))
3856                         return PTR_ERR(FDEV(i).bdev);
3857
3858                 /* to release errored devices */
3859                 sbi->s_ndevs = i + 1;
3860
3861                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
3862                         sbi->aligned_blksize = false;
3863
3864 #ifdef CONFIG_BLK_DEV_ZONED
3865                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3866                                 !f2fs_sb_has_blkzoned(sbi)) {
3867                         f2fs_err(sbi, "Zoned block device feature not enabled");
3868                         return -EINVAL;
3869                 }
3870                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3871                         if (init_blkz_info(sbi, i)) {
3872                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3873                                 return -EINVAL;
3874                         }
3875                         if (max_devices == 1)
3876                                 break;
3877                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3878                                   i, FDEV(i).path,
3879                                   FDEV(i).total_segments,
3880                                   FDEV(i).start_blk, FDEV(i).end_blk,
3881                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3882                                   "Host-aware" : "Host-managed");
3883                         continue;
3884                 }
3885 #endif
3886                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3887                           i, FDEV(i).path,
3888                           FDEV(i).total_segments,
3889                           FDEV(i).start_blk, FDEV(i).end_blk);
3890         }
3891         f2fs_info(sbi,
3892                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3893         return 0;
3894 }
3895
3896 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3897 {
3898 #if IS_ENABLED(CONFIG_UNICODE)
3899         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3900                 const struct f2fs_sb_encodings *encoding_info;
3901                 struct unicode_map *encoding;
3902                 __u16 encoding_flags;
3903
3904                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
3905                 if (!encoding_info) {
3906                         f2fs_err(sbi,
3907                                  "Encoding requested by superblock is unknown");
3908                         return -EINVAL;
3909                 }
3910
3911                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
3912                 encoding = utf8_load(encoding_info->version);
3913                 if (IS_ERR(encoding)) {
3914                         f2fs_err(sbi,
3915                                  "can't mount with superblock charset: %s-%u.%u.%u "
3916                                  "not supported by the kernel. flags: 0x%x.",
3917                                  encoding_info->name,
3918                                  unicode_major(encoding_info->version),
3919                                  unicode_minor(encoding_info->version),
3920                                  unicode_rev(encoding_info->version),
3921                                  encoding_flags);
3922                         return PTR_ERR(encoding);
3923                 }
3924                 f2fs_info(sbi, "Using encoding defined by superblock: "
3925                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
3926                          unicode_major(encoding_info->version),
3927                          unicode_minor(encoding_info->version),
3928                          unicode_rev(encoding_info->version),
3929                          encoding_flags);
3930
3931                 sbi->sb->s_encoding = encoding;
3932                 sbi->sb->s_encoding_flags = encoding_flags;
3933         }
3934 #else
3935         if (f2fs_sb_has_casefold(sbi)) {
3936                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3937                 return -EINVAL;
3938         }
3939 #endif
3940         return 0;
3941 }
3942
3943 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3944 {
3945         struct f2fs_sm_info *sm_i = SM_I(sbi);
3946
3947         /* adjust parameters according to the volume size */
3948         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3949                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3950                 if (f2fs_block_unit_discard(sbi))
3951                         sm_i->dcc_info->discard_granularity = 1;
3952                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE |
3953                                         1 << F2FS_IPU_HONOR_OPU_WRITE;
3954         }
3955
3956         sbi->readdir_ra = 1;
3957 }
3958
3959 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3960 {
3961         struct f2fs_sb_info *sbi;
3962         struct f2fs_super_block *raw_super;
3963         struct inode *root;
3964         int err;
3965         bool skip_recovery = false, need_fsck = false;
3966         char *options = NULL;
3967         int recovery, i, valid_super_block;
3968         struct curseg_info *seg_i;
3969         int retry_cnt = 1;
3970
3971 try_onemore:
3972         err = -EINVAL;
3973         raw_super = NULL;
3974         valid_super_block = -1;
3975         recovery = 0;
3976
3977         /* allocate memory for f2fs-specific super block info */
3978         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3979         if (!sbi)
3980                 return -ENOMEM;
3981
3982         sbi->sb = sb;
3983
3984         /* Load the checksum driver */
3985         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3986         if (IS_ERR(sbi->s_chksum_driver)) {
3987                 f2fs_err(sbi, "Cannot load crc32 driver.");
3988                 err = PTR_ERR(sbi->s_chksum_driver);
3989                 sbi->s_chksum_driver = NULL;
3990                 goto free_sbi;
3991         }
3992
3993         /* set a block size */
3994         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3995                 f2fs_err(sbi, "unable to set blocksize");
3996                 goto free_sbi;
3997         }
3998
3999         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4000                                                                 &recovery);
4001         if (err)
4002                 goto free_sbi;
4003
4004         sb->s_fs_info = sbi;
4005         sbi->raw_super = raw_super;
4006
4007         /* precompute checksum seed for metadata */
4008         if (f2fs_sb_has_inode_chksum(sbi))
4009                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4010                                                 sizeof(raw_super->uuid));
4011
4012         default_options(sbi);
4013         /* parse mount options */
4014         options = kstrdup((const char *)data, GFP_KERNEL);
4015         if (data && !options) {
4016                 err = -ENOMEM;
4017                 goto free_sb_buf;
4018         }
4019
4020         err = parse_options(sb, options, false);
4021         if (err)
4022                 goto free_options;
4023
4024         sb->s_maxbytes = max_file_blocks(NULL) <<
4025                                 le32_to_cpu(raw_super->log_blocksize);
4026         sb->s_max_links = F2FS_LINK_MAX;
4027
4028         err = f2fs_setup_casefold(sbi);
4029         if (err)
4030                 goto free_options;
4031
4032 #ifdef CONFIG_QUOTA
4033         sb->dq_op = &f2fs_quota_operations;
4034         sb->s_qcop = &f2fs_quotactl_ops;
4035         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4036
4037         if (f2fs_sb_has_quota_ino(sbi)) {
4038                 for (i = 0; i < MAXQUOTAS; i++) {
4039                         if (f2fs_qf_ino(sbi->sb, i))
4040                                 sbi->nquota_files++;
4041                 }
4042         }
4043 #endif
4044
4045         sb->s_op = &f2fs_sops;
4046 #ifdef CONFIG_FS_ENCRYPTION
4047         sb->s_cop = &f2fs_cryptops;
4048 #endif
4049 #ifdef CONFIG_FS_VERITY
4050         sb->s_vop = &f2fs_verityops;
4051 #endif
4052         sb->s_xattr = f2fs_xattr_handlers;
4053         sb->s_export_op = &f2fs_export_ops;
4054         sb->s_magic = F2FS_SUPER_MAGIC;
4055         sb->s_time_gran = 1;
4056         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4057                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4058         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4059         sb->s_iflags |= SB_I_CGROUPWB;
4060
4061         /* init f2fs-specific super block info */
4062         sbi->valid_super_block = valid_super_block;
4063         init_f2fs_rwsem(&sbi->gc_lock);
4064         mutex_init(&sbi->writepages);
4065         init_f2fs_rwsem(&sbi->cp_global_sem);
4066         init_f2fs_rwsem(&sbi->node_write);
4067         init_f2fs_rwsem(&sbi->node_change);
4068
4069         /* disallow all the data/node/meta page writes */
4070         set_sbi_flag(sbi, SBI_POR_DOING);
4071         spin_lock_init(&sbi->stat_lock);
4072
4073         for (i = 0; i < NR_PAGE_TYPE; i++) {
4074                 int n = (i == META) ? 1 : NR_TEMP_TYPE;
4075                 int j;
4076
4077                 sbi->write_io[i] =
4078                         f2fs_kmalloc(sbi,
4079                                      array_size(n,
4080                                                 sizeof(struct f2fs_bio_info)),
4081                                      GFP_KERNEL);
4082                 if (!sbi->write_io[i]) {
4083                         err = -ENOMEM;
4084                         goto free_bio_info;
4085                 }
4086
4087                 for (j = HOT; j < n; j++) {
4088                         init_f2fs_rwsem(&sbi->write_io[i][j].io_rwsem);
4089                         sbi->write_io[i][j].sbi = sbi;
4090                         sbi->write_io[i][j].bio = NULL;
4091                         spin_lock_init(&sbi->write_io[i][j].io_lock);
4092                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
4093                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
4094                         init_f2fs_rwsem(&sbi->write_io[i][j].bio_list_lock);
4095                 }
4096         }
4097
4098         init_f2fs_rwsem(&sbi->cp_rwsem);
4099         init_f2fs_rwsem(&sbi->quota_sem);
4100         init_waitqueue_head(&sbi->cp_wait);
4101         init_sb_info(sbi);
4102
4103         err = f2fs_init_iostat(sbi);
4104         if (err)
4105                 goto free_bio_info;
4106
4107         err = init_percpu_info(sbi);
4108         if (err)
4109                 goto free_iostat;
4110
4111         if (F2FS_IO_ALIGNED(sbi)) {
4112                 sbi->write_io_dummy =
4113                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4114                 if (!sbi->write_io_dummy) {
4115                         err = -ENOMEM;
4116                         goto free_percpu;
4117                 }
4118         }
4119
4120         /* init per sbi slab cache */
4121         err = f2fs_init_xattr_caches(sbi);
4122         if (err)
4123                 goto free_io_dummy;
4124         err = f2fs_init_page_array_cache(sbi);
4125         if (err)
4126                 goto free_xattr_cache;
4127
4128         /* get an inode for meta space */
4129         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4130         if (IS_ERR(sbi->meta_inode)) {
4131                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4132                 err = PTR_ERR(sbi->meta_inode);
4133                 goto free_page_array_cache;
4134         }
4135
4136         err = f2fs_get_valid_checkpoint(sbi);
4137         if (err) {
4138                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4139                 goto free_meta_inode;
4140         }
4141
4142         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4143                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4144         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4145                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4146                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4147         }
4148
4149         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4150                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4151
4152         /* Initialize device list */
4153         err = f2fs_scan_devices(sbi);
4154         if (err) {
4155                 f2fs_err(sbi, "Failed to find devices");
4156                 goto free_devices;
4157         }
4158
4159         err = f2fs_init_post_read_wq(sbi);
4160         if (err) {
4161                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4162                 goto free_devices;
4163         }
4164
4165         sbi->total_valid_node_count =
4166                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4167         percpu_counter_set(&sbi->total_valid_inode_count,
4168                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4169         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4170         sbi->total_valid_block_count =
4171                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4172         sbi->last_valid_block_count = sbi->total_valid_block_count;
4173         sbi->reserved_blocks = 0;
4174         sbi->current_reserved_blocks = 0;
4175         limit_reserve_root(sbi);
4176         adjust_unusable_cap_perc(sbi);
4177
4178         for (i = 0; i < NR_INODE_TYPE; i++) {
4179                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4180                 spin_lock_init(&sbi->inode_lock[i]);
4181         }
4182         mutex_init(&sbi->flush_lock);
4183
4184         f2fs_init_extent_cache_info(sbi);
4185
4186         f2fs_init_ino_entry_info(sbi);
4187
4188         f2fs_init_fsync_node_info(sbi);
4189
4190         /* setup checkpoint request control and start checkpoint issue thread */
4191         f2fs_init_ckpt_req_control(sbi);
4192         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4193                         test_opt(sbi, MERGE_CHECKPOINT)) {
4194                 err = f2fs_start_ckpt_thread(sbi);
4195                 if (err) {
4196                         f2fs_err(sbi,
4197                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4198                             err);
4199                         goto stop_ckpt_thread;
4200                 }
4201         }
4202
4203         /* setup f2fs internal modules */
4204         err = f2fs_build_segment_manager(sbi);
4205         if (err) {
4206                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4207                          err);
4208                 goto free_sm;
4209         }
4210         err = f2fs_build_node_manager(sbi);
4211         if (err) {
4212                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4213                          err);
4214                 goto free_nm;
4215         }
4216
4217         err = adjust_reserved_segment(sbi);
4218         if (err)
4219                 goto free_nm;
4220
4221         /* For write statistics */
4222         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4223
4224         /* Read accumulated write IO statistics if exists */
4225         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4226         if (__exist_node_summaries(sbi))
4227                 sbi->kbytes_written =
4228                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4229
4230         f2fs_build_gc_manager(sbi);
4231
4232         err = f2fs_build_stats(sbi);
4233         if (err)
4234                 goto free_nm;
4235
4236         /* get an inode for node space */
4237         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4238         if (IS_ERR(sbi->node_inode)) {
4239                 f2fs_err(sbi, "Failed to read node inode");
4240                 err = PTR_ERR(sbi->node_inode);
4241                 goto free_stats;
4242         }
4243
4244         /* read root inode and dentry */
4245         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4246         if (IS_ERR(root)) {
4247                 f2fs_err(sbi, "Failed to read root inode");
4248                 err = PTR_ERR(root);
4249                 goto free_node_inode;
4250         }
4251         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4252                         !root->i_size || !root->i_nlink) {
4253                 iput(root);
4254                 err = -EINVAL;
4255                 goto free_node_inode;
4256         }
4257
4258         sb->s_root = d_make_root(root); /* allocate root dentry */
4259         if (!sb->s_root) {
4260                 err = -ENOMEM;
4261                 goto free_node_inode;
4262         }
4263
4264         err = f2fs_init_compress_inode(sbi);
4265         if (err)
4266                 goto free_root_inode;
4267
4268         err = f2fs_register_sysfs(sbi);
4269         if (err)
4270                 goto free_compress_inode;
4271
4272 #ifdef CONFIG_QUOTA
4273         /* Enable quota usage during mount */
4274         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4275                 err = f2fs_enable_quotas(sb);
4276                 if (err)
4277                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4278         }
4279 #endif
4280         /* if there are any orphan inodes, free them */
4281         err = f2fs_recover_orphan_inodes(sbi);
4282         if (err)
4283                 goto free_meta;
4284
4285         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4286                 goto reset_checkpoint;
4287
4288         /* recover fsynced data */
4289         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4290                         !test_opt(sbi, NORECOVERY)) {
4291                 /*
4292                  * mount should be failed, when device has readonly mode, and
4293                  * previous checkpoint was not done by clean system shutdown.
4294                  */
4295                 if (f2fs_hw_is_readonly(sbi)) {
4296                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4297                                 err = f2fs_recover_fsync_data(sbi, true);
4298                                 if (err > 0) {
4299                                         err = -EROFS;
4300                                         f2fs_err(sbi, "Need to recover fsync data, but "
4301                                                 "write access unavailable, please try "
4302                                                 "mount w/ disable_roll_forward or norecovery");
4303                                 }
4304                                 if (err < 0)
4305                                         goto free_meta;
4306                         }
4307                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4308                         goto reset_checkpoint;
4309                 }
4310
4311                 if (need_fsck)
4312                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4313
4314                 if (skip_recovery)
4315                         goto reset_checkpoint;
4316
4317                 err = f2fs_recover_fsync_data(sbi, false);
4318                 if (err < 0) {
4319                         if (err != -ENOMEM)
4320                                 skip_recovery = true;
4321                         need_fsck = true;
4322                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4323                                  err);
4324                         goto free_meta;
4325                 }
4326         } else {
4327                 err = f2fs_recover_fsync_data(sbi, true);
4328
4329                 if (!f2fs_readonly(sb) && err > 0) {
4330                         err = -EINVAL;
4331                         f2fs_err(sbi, "Need to recover fsync data");
4332                         goto free_meta;
4333                 }
4334         }
4335
4336         /*
4337          * If the f2fs is not readonly and fsync data recovery succeeds,
4338          * check zoned block devices' write pointer consistency.
4339          */
4340         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4341                 err = f2fs_check_write_pointer(sbi);
4342                 if (err)
4343                         goto free_meta;
4344         }
4345
4346 reset_checkpoint:
4347         f2fs_init_inmem_curseg(sbi);
4348
4349         /* f2fs_recover_fsync_data() cleared this already */
4350         clear_sbi_flag(sbi, SBI_POR_DOING);
4351
4352         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4353                 err = f2fs_disable_checkpoint(sbi);
4354                 if (err)
4355                         goto sync_free_meta;
4356         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4357                 f2fs_enable_checkpoint(sbi);
4358         }
4359
4360         /*
4361          * If filesystem is not mounted as read-only then
4362          * do start the gc_thread.
4363          */
4364         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4365                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4366                 /* After POR, we can run background GC thread.*/
4367                 err = f2fs_start_gc_thread(sbi);
4368                 if (err)
4369                         goto sync_free_meta;
4370         }
4371         kvfree(options);
4372
4373         /* recover broken superblock */
4374         if (recovery) {
4375                 err = f2fs_commit_super(sbi, true);
4376                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4377                           sbi->valid_super_block ? 1 : 2, err);
4378         }
4379
4380         f2fs_join_shrinker(sbi);
4381
4382         f2fs_tuning_parameters(sbi);
4383
4384         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4385                     cur_cp_version(F2FS_CKPT(sbi)));
4386         f2fs_update_time(sbi, CP_TIME);
4387         f2fs_update_time(sbi, REQ_TIME);
4388         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4389         return 0;
4390
4391 sync_free_meta:
4392         /* safe to flush all the data */
4393         sync_filesystem(sbi->sb);
4394         retry_cnt = 0;
4395
4396 free_meta:
4397 #ifdef CONFIG_QUOTA
4398         f2fs_truncate_quota_inode_pages(sb);
4399         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4400                 f2fs_quota_off_umount(sbi->sb);
4401 #endif
4402         /*
4403          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4404          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4405          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4406          * falls into an infinite loop in f2fs_sync_meta_pages().
4407          */
4408         truncate_inode_pages_final(META_MAPPING(sbi));
4409         /* evict some inodes being cached by GC */
4410         evict_inodes(sb);
4411         f2fs_unregister_sysfs(sbi);
4412 free_compress_inode:
4413         f2fs_destroy_compress_inode(sbi);
4414 free_root_inode:
4415         dput(sb->s_root);
4416         sb->s_root = NULL;
4417 free_node_inode:
4418         f2fs_release_ino_entry(sbi, true);
4419         truncate_inode_pages_final(NODE_MAPPING(sbi));
4420         iput(sbi->node_inode);
4421         sbi->node_inode = NULL;
4422 free_stats:
4423         f2fs_destroy_stats(sbi);
4424 free_nm:
4425         /* stop discard thread before destroying node manager */
4426         f2fs_stop_discard_thread(sbi);
4427         f2fs_destroy_node_manager(sbi);
4428 free_sm:
4429         f2fs_destroy_segment_manager(sbi);
4430         f2fs_destroy_post_read_wq(sbi);
4431 stop_ckpt_thread:
4432         f2fs_stop_ckpt_thread(sbi);
4433 free_devices:
4434         destroy_device_list(sbi);
4435         kvfree(sbi->ckpt);
4436 free_meta_inode:
4437         make_bad_inode(sbi->meta_inode);
4438         iput(sbi->meta_inode);
4439         sbi->meta_inode = NULL;
4440 free_page_array_cache:
4441         f2fs_destroy_page_array_cache(sbi);
4442 free_xattr_cache:
4443         f2fs_destroy_xattr_caches(sbi);
4444 free_io_dummy:
4445         mempool_destroy(sbi->write_io_dummy);
4446 free_percpu:
4447         destroy_percpu_info(sbi);
4448 free_iostat:
4449         f2fs_destroy_iostat(sbi);
4450 free_bio_info:
4451         for (i = 0; i < NR_PAGE_TYPE; i++)
4452                 kvfree(sbi->write_io[i]);
4453
4454 #if IS_ENABLED(CONFIG_UNICODE)
4455         utf8_unload(sb->s_encoding);
4456         sb->s_encoding = NULL;
4457 #endif
4458 free_options:
4459 #ifdef CONFIG_QUOTA
4460         for (i = 0; i < MAXQUOTAS; i++)
4461                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4462 #endif
4463         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4464         kvfree(options);
4465 free_sb_buf:
4466         kfree(raw_super);
4467 free_sbi:
4468         if (sbi->s_chksum_driver)
4469                 crypto_free_shash(sbi->s_chksum_driver);
4470         kfree(sbi);
4471
4472         /* give only one another chance */
4473         if (retry_cnt > 0 && skip_recovery) {
4474                 retry_cnt--;
4475                 shrink_dcache_sb(sb);
4476                 goto try_onemore;
4477         }
4478         return err;
4479 }
4480
4481 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4482                         const char *dev_name, void *data)
4483 {
4484         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4485 }
4486
4487 static void kill_f2fs_super(struct super_block *sb)
4488 {
4489         if (sb->s_root) {
4490                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4491
4492                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4493                 f2fs_stop_gc_thread(sbi);
4494                 f2fs_stop_discard_thread(sbi);
4495
4496 #ifdef CONFIG_F2FS_FS_COMPRESSION
4497                 /*
4498                  * latter evict_inode() can bypass checking and invalidating
4499                  * compress inode cache.
4500                  */
4501                 if (test_opt(sbi, COMPRESS_CACHE))
4502                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4503 #endif
4504
4505                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4506                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4507                         struct cp_control cpc = {
4508                                 .reason = CP_UMOUNT,
4509                         };
4510                         f2fs_write_checkpoint(sbi, &cpc);
4511                 }
4512
4513                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4514                         sb->s_flags &= ~SB_RDONLY;
4515         }
4516         kill_block_super(sb);
4517 }
4518
4519 static struct file_system_type f2fs_fs_type = {
4520         .owner          = THIS_MODULE,
4521         .name           = "f2fs",
4522         .mount          = f2fs_mount,
4523         .kill_sb        = kill_f2fs_super,
4524         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4525 };
4526 MODULE_ALIAS_FS("f2fs");
4527
4528 static int __init init_inodecache(void)
4529 {
4530         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4531                         sizeof(struct f2fs_inode_info), 0,
4532                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4533         if (!f2fs_inode_cachep)
4534                 return -ENOMEM;
4535         return 0;
4536 }
4537
4538 static void destroy_inodecache(void)
4539 {
4540         /*
4541          * Make sure all delayed rcu free inodes are flushed before we
4542          * destroy cache.
4543          */
4544         rcu_barrier();
4545         kmem_cache_destroy(f2fs_inode_cachep);
4546 }
4547
4548 static int __init init_f2fs_fs(void)
4549 {
4550         int err;
4551
4552         if (PAGE_SIZE != F2FS_BLKSIZE) {
4553                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4554                                 PAGE_SIZE, F2FS_BLKSIZE);
4555                 return -EINVAL;
4556         }
4557
4558         err = init_inodecache();
4559         if (err)
4560                 goto fail;
4561         err = f2fs_create_node_manager_caches();
4562         if (err)
4563                 goto free_inodecache;
4564         err = f2fs_create_segment_manager_caches();
4565         if (err)
4566                 goto free_node_manager_caches;
4567         err = f2fs_create_checkpoint_caches();
4568         if (err)
4569                 goto free_segment_manager_caches;
4570         err = f2fs_create_recovery_cache();
4571         if (err)
4572                 goto free_checkpoint_caches;
4573         err = f2fs_create_extent_cache();
4574         if (err)
4575                 goto free_recovery_cache;
4576         err = f2fs_create_garbage_collection_cache();
4577         if (err)
4578                 goto free_extent_cache;
4579         err = f2fs_init_sysfs();
4580         if (err)
4581                 goto free_garbage_collection_cache;
4582         err = register_shrinker(&f2fs_shrinker_info);
4583         if (err)
4584                 goto free_sysfs;
4585         err = register_filesystem(&f2fs_fs_type);
4586         if (err)
4587                 goto free_shrinker;
4588         f2fs_create_root_stats();
4589         err = f2fs_init_post_read_processing();
4590         if (err)
4591                 goto free_root_stats;
4592         err = f2fs_init_iostat_processing();
4593         if (err)
4594                 goto free_post_read;
4595         err = f2fs_init_bio_entry_cache();
4596         if (err)
4597                 goto free_iostat;
4598         err = f2fs_init_bioset();
4599         if (err)
4600                 goto free_bio_enrty_cache;
4601         err = f2fs_init_compress_mempool();
4602         if (err)
4603                 goto free_bioset;
4604         err = f2fs_init_compress_cache();
4605         if (err)
4606                 goto free_compress_mempool;
4607         err = f2fs_create_casefold_cache();
4608         if (err)
4609                 goto free_compress_cache;
4610         return 0;
4611 free_compress_cache:
4612         f2fs_destroy_compress_cache();
4613 free_compress_mempool:
4614         f2fs_destroy_compress_mempool();
4615 free_bioset:
4616         f2fs_destroy_bioset();
4617 free_bio_enrty_cache:
4618         f2fs_destroy_bio_entry_cache();
4619 free_iostat:
4620         f2fs_destroy_iostat_processing();
4621 free_post_read:
4622         f2fs_destroy_post_read_processing();
4623 free_root_stats:
4624         f2fs_destroy_root_stats();
4625         unregister_filesystem(&f2fs_fs_type);
4626 free_shrinker:
4627         unregister_shrinker(&f2fs_shrinker_info);
4628 free_sysfs:
4629         f2fs_exit_sysfs();
4630 free_garbage_collection_cache:
4631         f2fs_destroy_garbage_collection_cache();
4632 free_extent_cache:
4633         f2fs_destroy_extent_cache();
4634 free_recovery_cache:
4635         f2fs_destroy_recovery_cache();
4636 free_checkpoint_caches:
4637         f2fs_destroy_checkpoint_caches();
4638 free_segment_manager_caches:
4639         f2fs_destroy_segment_manager_caches();
4640 free_node_manager_caches:
4641         f2fs_destroy_node_manager_caches();
4642 free_inodecache:
4643         destroy_inodecache();
4644 fail:
4645         return err;
4646 }
4647
4648 static void __exit exit_f2fs_fs(void)
4649 {
4650         f2fs_destroy_casefold_cache();
4651         f2fs_destroy_compress_cache();
4652         f2fs_destroy_compress_mempool();
4653         f2fs_destroy_bioset();
4654         f2fs_destroy_bio_entry_cache();
4655         f2fs_destroy_iostat_processing();
4656         f2fs_destroy_post_read_processing();
4657         f2fs_destroy_root_stats();
4658         unregister_filesystem(&f2fs_fs_type);
4659         unregister_shrinker(&f2fs_shrinker_info);
4660         f2fs_exit_sysfs();
4661         f2fs_destroy_garbage_collection_cache();
4662         f2fs_destroy_extent_cache();
4663         f2fs_destroy_recovery_cache();
4664         f2fs_destroy_checkpoint_caches();
4665         f2fs_destroy_segment_manager_caches();
4666         f2fs_destroy_node_manager_caches();
4667         destroy_inodecache();
4668 }
4669
4670 module_init(init_f2fs_fs)
4671 module_exit(exit_f2fs_fs)
4672
4673 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4674 MODULE_DESCRIPTION("Flash Friendly File System");
4675 MODULE_LICENSE("GPL");
4676 MODULE_SOFTDEP("pre: crc32");
4677