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         return 0;
 529 #else
 530         f2fs_warn(sbi, "test_dummy_encryption option not supported");
 531         return -EINVAL;
 532 #endif
 533 }
 534
 535 #ifdef CONFIG_F2FS_FS_COMPRESSION
 536 /*
 537  * 1. The same extension name cannot not appear in both compress and non-compress extension
 538  * at the same time.
 539  * 2. If the compress extension specifies all files, the types specified by the non-compress
 540  * extension will be treated as special cases and will not be compressed.
 541  * 3. Don't allow the non-compress extension specifies all files.
 542  */
 543 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 544 {
 545         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 546         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 547         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 548
 549         ext = F2FS_OPTION(sbi).extensions;
 550         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 551         noext = F2FS_OPTION(sbi).noextensions;
 552         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 553
 554         if (!noext_cnt)
 555                 return 0;
 556
 557         for (no_index = 0; no_index < noext_cnt; no_index++) {
 558                 if (!strcasecmp("*", noext[no_index])) {
 559                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 560                         return -EINVAL;
 561                 }
 562                 for (index = 0; index < ext_cnt; index++) {
 563                         if (!strcasecmp(ext[index], noext[no_index])) {
 564                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 565                                                 ext[index]);
 566                                 return -EINVAL;
 567                         }
 568                 }
 569         }
 570         return 0;
 571 }
 572
 573 #ifdef CONFIG_F2FS_FS_LZ4
 574 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 575 {
 576 #ifdef CONFIG_F2FS_FS_LZ4HC
 577         unsigned int level;
 578 #endif
 579
 580         if (strlen(str) == 3) {
 581                 F2FS_OPTION(sbi).compress_level = 0;
 582                 return 0;
 583         }
 584
 585 #ifdef CONFIG_F2FS_FS_LZ4HC
 586         str += 3;
 587
 588         if (str[0] != ':') {
 589                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 590                 return -EINVAL;
 591         }
 592         if (kstrtouint(str + 1, 10, &level))
 593                 return -EINVAL;
 594
 595         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 596                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 597                 return -EINVAL;
 598         }
 599
 600         F2FS_OPTION(sbi).compress_level = level;
 601         return 0;
 602 #else
 603         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 604         return -EINVAL;
 605 #endif
 606 }
 607 #endif
 608
 609 #ifdef CONFIG_F2FS_FS_ZSTD
 610 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 611 {
 612         unsigned int level;
 613         int len = 4;
 614
 615         if (strlen(str) == len) {
 616                 F2FS_OPTION(sbi).compress_level = 0;
 617                 return 0;
 618         }
 619
 620         str += len;
 621
 622         if (str[0] != ':') {
 623                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 624                 return -EINVAL;
 625         }
 626         if (kstrtouint(str + 1, 10, &level))
 627                 return -EINVAL;
 628
 629         if (!level || level > zstd_max_clevel()) {
 630                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 631                 return -EINVAL;
 632         }
 633
 634         F2FS_OPTION(sbi).compress_level = level;
 635         return 0;
 636 }
 637 #endif
 638 #endif
 639
 640 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 641 {
 642         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 643         substring_t args[MAX_OPT_ARGS];
 644 #ifdef CONFIG_F2FS_FS_COMPRESSION
 645         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 646         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 647         int ext_cnt, noext_cnt;
 648 #endif
 649         char *p, *name;
 650         int arg = 0;
 651         kuid_t uid;
 652         kgid_t gid;
 653         int ret;
 654
 655         if (!options)
 656                 goto default_check;
 657
 658         while ((p = strsep(&options, ",")) != NULL) {
 659                 int token;
 660
 661                 if (!*p)
 662                         continue;
 663                 /*
 664                  * Initialize args struct so we know whether arg was
 665                  * found; some options take optional arguments.
 666                  */
 667                 args[0].to = args[0].from = NULL;
 668                 token = match_token(p, f2fs_tokens, args);
 669
 670                 switch (token) {
 671                 case Opt_gc_background:
 672                         name = match_strdup(&args[0]);
 673
 674                         if (!name)
 675                                 return -ENOMEM;
 676                         if (!strcmp(name, "on")) {
 677                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 678                         } else if (!strcmp(name, "off")) {
 679                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 680                         } else if (!strcmp(name, "sync")) {
 681                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 682                         } else {
 683                                 kfree(name);
 684                                 return -EINVAL;
 685                         }
 686                         kfree(name);
 687                         break;
 688                 case Opt_disable_roll_forward:
 689                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 690                         break;
 691                 case Opt_norecovery:
 692                         /* this option mounts f2fs with ro */
 693                         set_opt(sbi, NORECOVERY);
 694                         if (!f2fs_readonly(sb))
 695                                 return -EINVAL;
 696                         break;
 697                 case Opt_discard:
 698                         if (!f2fs_hw_support_discard(sbi)) {
 699                                 f2fs_warn(sbi, "device does not support discard");
 700                                 break;
 701                         }
 702                         set_opt(sbi, DISCARD);
 703                         break;
 704                 case Opt_nodiscard:
 705                         if (f2fs_hw_should_discard(sbi)) {
 706                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 707                                 return -EINVAL;
 708                         }
 709                         clear_opt(sbi, DISCARD);
 710                         break;
 711                 case Opt_noheap:
 712                         set_opt(sbi, NOHEAP);
 713                         break;
 714                 case Opt_heap:
 715                         clear_opt(sbi, NOHEAP);
 716                         break;
 717 #ifdef CONFIG_F2FS_FS_XATTR
 718                 case Opt_user_xattr:
 719                         set_opt(sbi, XATTR_USER);
 720                         break;
 721                 case Opt_nouser_xattr:
 722                         clear_opt(sbi, XATTR_USER);
 723                         break;
 724                 case Opt_inline_xattr:
 725                         set_opt(sbi, INLINE_XATTR);
 726                         break;
 727                 case Opt_noinline_xattr:
 728                         clear_opt(sbi, INLINE_XATTR);
 729                         break;
 730                 case Opt_inline_xattr_size:
 731                         if (args->from && match_int(args, &arg))
 732                                 return -EINVAL;
 733                         set_opt(sbi, INLINE_XATTR_SIZE);
 734                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 735                         break;
 736 #else
 737                 case Opt_user_xattr:
 738                         f2fs_info(sbi, "user_xattr options not supported");
 739                         break;
 740                 case Opt_nouser_xattr:
 741                         f2fs_info(sbi, "nouser_xattr options not supported");
 742                         break;
 743                 case Opt_inline_xattr:
 744                         f2fs_info(sbi, "inline_xattr options not supported");
 745                         break;
 746                 case Opt_noinline_xattr:
 747                         f2fs_info(sbi, "noinline_xattr options not supported");
 748                         break;
 749 #endif
 750 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 751                 case Opt_acl:
 752                         set_opt(sbi, POSIX_ACL);
 753                         break;
 754                 case Opt_noacl:
 755                         clear_opt(sbi, POSIX_ACL);
 756                         break;
 757 #else
 758                 case Opt_acl:
 759                         f2fs_info(sbi, "acl options not supported");
 760                         break;
 761                 case Opt_noacl:
 762                         f2fs_info(sbi, "noacl options not supported");
 763                         break;
 764 #endif
 765                 case Opt_active_logs:
 766                         if (args->from && match_int(args, &arg))
 767                                 return -EINVAL;
 768                         if (arg != 2 && arg != 4 &&
 769                                 arg != NR_CURSEG_PERSIST_TYPE)
 770                                 return -EINVAL;
 771                         F2FS_OPTION(sbi).active_logs = arg;
 772                         break;
 773                 case Opt_disable_ext_identify:
 774                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 775                         break;
 776                 case Opt_inline_data:
 777                         set_opt(sbi, INLINE_DATA);
 778                         break;
 779                 case Opt_inline_dentry:
 780                         set_opt(sbi, INLINE_DENTRY);
 781                         break;
 782                 case Opt_noinline_dentry:
 783                         clear_opt(sbi, INLINE_DENTRY);
 784                         break;
 785                 case Opt_flush_merge:
 786                         set_opt(sbi, FLUSH_MERGE);
 787                         break;
 788                 case Opt_noflush_merge:
 789                         clear_opt(sbi, FLUSH_MERGE);
 790                         break;
 791                 case Opt_nobarrier:
 792                         set_opt(sbi, NOBARRIER);
 793                         break;
 794                 case Opt_fastboot:
 795                         set_opt(sbi, FASTBOOT);
 796                         break;
 797                 case Opt_extent_cache:
 798                         set_opt(sbi, EXTENT_CACHE);
 799                         break;
 800                 case Opt_noextent_cache:
 801                         clear_opt(sbi, EXTENT_CACHE);
 802                         break;
 803                 case Opt_noinline_data:
 804                         clear_opt(sbi, INLINE_DATA);
 805                         break;
 806                 case Opt_data_flush:
 807                         set_opt(sbi, DATA_FLUSH);
 808                         break;
 809                 case Opt_reserve_root:
 810                         if (args->from && match_int(args, &arg))
 811                                 return -EINVAL;
 812                         if (test_opt(sbi, RESERVE_ROOT)) {
 813                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 814                                           F2FS_OPTION(sbi).root_reserved_blocks);
 815                         } else {
 816                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 817                                 set_opt(sbi, RESERVE_ROOT);
 818                         }
 819                         break;
 820                 case Opt_resuid:
 821                         if (args->from && match_int(args, &arg))
 822                                 return -EINVAL;
 823                         uid = make_kuid(current_user_ns(), arg);
 824                         if (!uid_valid(uid)) {
 825                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 826                                 return -EINVAL;
 827                         }
 828                         F2FS_OPTION(sbi).s_resuid = uid;
 829                         break;
 830                 case Opt_resgid:
 831                         if (args->from && match_int(args, &arg))
 832                                 return -EINVAL;
 833                         gid = make_kgid(current_user_ns(), arg);
 834                         if (!gid_valid(gid)) {
 835                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 836                                 return -EINVAL;
 837                         }
 838                         F2FS_OPTION(sbi).s_resgid = gid;
 839                         break;
 840                 case Opt_mode:
 841                         name = match_strdup(&args[0]);
 842
 843                         if (!name)
 844                                 return -ENOMEM;
 845                         if (!strcmp(name, "adaptive")) {
 846                                 if (f2fs_sb_has_blkzoned(sbi)) {
 847                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 848                                         kfree(name);
 849                                         return -EINVAL;
 850                                 }
 851                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 852                         } else if (!strcmp(name, "lfs")) {
 853                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 854                         } else if (!strcmp(name, "fragment:segment")) {
 855                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 856                         } else if (!strcmp(name, "fragment:block")) {
 857                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 858                         } else {
 859                                 kfree(name);
 860                                 return -EINVAL;
 861                         }
 862                         kfree(name);
 863                         break;
 864                 case Opt_io_size_bits:
 865                         if (args->from && match_int(args, &arg))
 866                                 return -EINVAL;
 867                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 868                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 869                                           1 << arg, BIO_MAX_VECS);
 870                                 return -EINVAL;
 871                         }
 872                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 873                         break;
 874 #ifdef CONFIG_F2FS_FAULT_INJECTION
 875                 case Opt_fault_injection:
 876                         if (args->from && match_int(args, &arg))
 877                                 return -EINVAL;
 878                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 879                         set_opt(sbi, FAULT_INJECTION);
 880                         break;
 881
 882                 case Opt_fault_type:
 883                         if (args->from && match_int(args, &arg))
 884                                 return -EINVAL;
 885                         f2fs_build_fault_attr(sbi, 0, arg);
 886                         set_opt(sbi, FAULT_INJECTION);
 887                         break;
 888 #else
 889                 case Opt_fault_injection:
 890                         f2fs_info(sbi, "fault_injection options not supported");
 891                         break;
 892
 893                 case Opt_fault_type:
 894                         f2fs_info(sbi, "fault_type options not supported");
 895                         break;
 896 #endif
 897                 case Opt_lazytime:
 898                         sb->s_flags |= SB_LAZYTIME;
 899                         break;
 900                 case Opt_nolazytime:
 901                         sb->s_flags &= ~SB_LAZYTIME;
 902                         break;
 903 #ifdef CONFIG_QUOTA
 904                 case Opt_quota:
 905                 case Opt_usrquota:
 906                         set_opt(sbi, USRQUOTA);
 907                         break;
 908                 case Opt_grpquota:
 909                         set_opt(sbi, GRPQUOTA);
 910                         break;
 911                 case Opt_prjquota:
 912                         set_opt(sbi, PRJQUOTA);
 913                         break;
 914                 case Opt_usrjquota:
 915                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 916                         if (ret)
 917                                 return ret;
 918                         break;
 919                 case Opt_grpjquota:
 920                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 921                         if (ret)
 922                                 return ret;
 923                         break;
 924                 case Opt_prjjquota:
 925                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 926                         if (ret)
 927                                 return ret;
 928                         break;
 929                 case Opt_offusrjquota:
 930                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 931                         if (ret)
 932                                 return ret;
 933                         break;
 934                 case Opt_offgrpjquota:
 935                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 936                         if (ret)
 937                                 return ret;
 938                         break;
 939                 case Opt_offprjjquota:
 940                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 941                         if (ret)
 942                                 return ret;
 943                         break;
 944                 case Opt_jqfmt_vfsold:
 945                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 946                         break;
 947                 case Opt_jqfmt_vfsv0:
 948                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 949                         break;
 950                 case Opt_jqfmt_vfsv1:
 951                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 952                         break;
 953                 case Opt_noquota:
 954                         clear_opt(sbi, QUOTA);
 955                         clear_opt(sbi, USRQUOTA);
 956                         clear_opt(sbi, GRPQUOTA);
 957                         clear_opt(sbi, PRJQUOTA);
 958                         break;
 959 #else
 960                 case Opt_quota:
 961                 case Opt_usrquota:
 962                 case Opt_grpquota:
 963                 case Opt_prjquota:
 964                 case Opt_usrjquota:
 965                 case Opt_grpjquota:
 966                 case Opt_prjjquota:
 967                 case Opt_offusrjquota:
 968                 case Opt_offgrpjquota:
 969                 case Opt_offprjjquota:
 970                 case Opt_jqfmt_vfsold:
 971                 case Opt_jqfmt_vfsv0:
 972                 case Opt_jqfmt_vfsv1:
 973                 case Opt_noquota:
 974                         f2fs_info(sbi, "quota operations not supported");
 975                         break;
 976 #endif
 977                 case Opt_alloc:
 978                         name = match_strdup(&args[0]);
 979                         if (!name)
 980                                 return -ENOMEM;
 981
 982                         if (!strcmp(name, "default")) {
 983                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 984                         } else if (!strcmp(name, "reuse")) {
 985                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 986                         } else {
 987                                 kfree(name);
 988                                 return -EINVAL;
 989                         }
 990                         kfree(name);
 991                         break;
 992                 case Opt_fsync:
 993                         name = match_strdup(&args[0]);
 994                         if (!name)
 995                                 return -ENOMEM;
 996                         if (!strcmp(name, "posix")) {
 997                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 998                         } else if (!strcmp(name, "strict")) {
 999                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1000                         } else if (!strcmp(name, "nobarrier")) {
1001                                 F2FS_OPTION(sbi).fsync_mode =
1002                                                         FSYNC_MODE_NOBARRIER;
1003                         } else {
1004                                 kfree(name);
1005                                 return -EINVAL;
1006                         }
1007                         kfree(name);
1008                         break;
1009                 case Opt_test_dummy_encryption:
1010                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1011                                                              is_remount);
1012                         if (ret)
1013                                 return ret;
1014                         break;
1015                 case Opt_inlinecrypt:
1016 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1017                         sb->s_flags |= SB_INLINECRYPT;
1018 #else
1019                         f2fs_info(sbi, "inline encryption not supported");
1020 #endif
1021                         break;
1022                 case Opt_checkpoint_disable_cap_perc:
1023                         if (args->from && match_int(args, &arg))
1024                                 return -EINVAL;
1025                         if (arg < 0 || arg > 100)
1026                                 return -EINVAL;
1027                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1028                         set_opt(sbi, DISABLE_CHECKPOINT);
1029                         break;
1030                 case Opt_checkpoint_disable_cap:
1031                         if (args->from && match_int(args, &arg))
1032                                 return -EINVAL;
1033                         F2FS_OPTION(sbi).unusable_cap = arg;
1034                         set_opt(sbi, DISABLE_CHECKPOINT);
1035                         break;
1036                 case Opt_checkpoint_disable:
1037                         set_opt(sbi, DISABLE_CHECKPOINT);
1038                         break;
1039                 case Opt_checkpoint_enable:
1040                         clear_opt(sbi, DISABLE_CHECKPOINT);
1041                         break;
1042                 case Opt_checkpoint_merge:
1043                         set_opt(sbi, MERGE_CHECKPOINT);
1044                         break;
1045                 case Opt_nocheckpoint_merge:
1046                         clear_opt(sbi, MERGE_CHECKPOINT);
1047                         break;
1048 #ifdef CONFIG_F2FS_FS_COMPRESSION
1049                 case Opt_compress_algorithm:
1050                         if (!f2fs_sb_has_compression(sbi)) {
1051                                 f2fs_info(sbi, "Image doesn't support compression");
1052                                 break;
1053                         }
1054                         name = match_strdup(&args[0]);
1055                         if (!name)
1056                                 return -ENOMEM;
1057                         if (!strcmp(name, "lzo")) {
1058 #ifdef CONFIG_F2FS_FS_LZO
1059                                 F2FS_OPTION(sbi).compress_level = 0;
1060                                 F2FS_OPTION(sbi).compress_algorithm =
1061                                                                 COMPRESS_LZO;
1062 #else
1063                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1064 #endif
1065                         } else if (!strncmp(name, "lz4", 3)) {
1066 #ifdef CONFIG_F2FS_FS_LZ4
1067                                 ret = f2fs_set_lz4hc_level(sbi, name);
1068                                 if (ret) {
1069                                         kfree(name);
1070                                         return -EINVAL;
1071                                 }
1072                                 F2FS_OPTION(sbi).compress_algorithm =
1073                                                                 COMPRESS_LZ4;
1074 #else
1075                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1076 #endif
1077                         } else if (!strncmp(name, "zstd", 4)) {
1078 #ifdef CONFIG_F2FS_FS_ZSTD
1079                                 ret = f2fs_set_zstd_level(sbi, name);
1080                                 if (ret) {
1081                                         kfree(name);
1082                                         return -EINVAL;
1083                                 }
1084                                 F2FS_OPTION(sbi).compress_algorithm =
1085                                                                 COMPRESS_ZSTD;
1086 #else
1087                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1088 #endif
1089                         } else if (!strcmp(name, "lzo-rle")) {
1090 #ifdef CONFIG_F2FS_FS_LZORLE
1091                                 F2FS_OPTION(sbi).compress_level = 0;
1092                                 F2FS_OPTION(sbi).compress_algorithm =
1093                                                                 COMPRESS_LZORLE;
1094 #else
1095                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1096 #endif
1097                         } else {
1098                                 kfree(name);
1099                                 return -EINVAL;
1100                         }
1101                         kfree(name);
1102                         break;
1103                 case Opt_compress_log_size:
1104                         if (!f2fs_sb_has_compression(sbi)) {
1105                                 f2fs_info(sbi, "Image doesn't support compression");
1106                                 break;
1107                         }
1108                         if (args->from && match_int(args, &arg))
1109                                 return -EINVAL;
1110                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1111                                 arg > MAX_COMPRESS_LOG_SIZE) {
1112                                 f2fs_err(sbi,
1113                                         "Compress cluster log size is out of range");
1114                                 return -EINVAL;
1115                         }
1116                         F2FS_OPTION(sbi).compress_log_size = arg;
1117                         break;
1118                 case Opt_compress_extension:
1119                         if (!f2fs_sb_has_compression(sbi)) {
1120                                 f2fs_info(sbi, "Image doesn't support compression");
1121                                 break;
1122                         }
1123                         name = match_strdup(&args[0]);
1124                         if (!name)
1125                                 return -ENOMEM;
1126
1127                         ext = F2FS_OPTION(sbi).extensions;
1128                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1129
1130                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1131                                 ext_cnt >= COMPRESS_EXT_NUM) {
1132                                 f2fs_err(sbi,
1133                                         "invalid extension length/number");
1134                                 kfree(name);
1135                                 return -EINVAL;
1136                         }
1137
1138                         strcpy(ext[ext_cnt], name);
1139                         F2FS_OPTION(sbi).compress_ext_cnt++;
1140                         kfree(name);
1141                         break;
1142                 case Opt_nocompress_extension:
1143                         if (!f2fs_sb_has_compression(sbi)) {
1144                                 f2fs_info(sbi, "Image doesn't support compression");
1145                                 break;
1146                         }
1147                         name = match_strdup(&args[0]);
1148                         if (!name)
1149                                 return -ENOMEM;
1150
1151                         noext = F2FS_OPTION(sbi).noextensions;
1152                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1153
1154                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1155                                 noext_cnt >= COMPRESS_EXT_NUM) {
1156                                 f2fs_err(sbi,
1157                                         "invalid extension length/number");
1158                                 kfree(name);
1159                                 return -EINVAL;
1160                         }
1161
1162                         strcpy(noext[noext_cnt], name);
1163                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1164                         kfree(name);
1165                         break;
1166                 case Opt_compress_chksum:
1167                         F2FS_OPTION(sbi).compress_chksum = true;
1168                         break;
1169                 case Opt_compress_mode:
1170                         name = match_strdup(&args[0]);
1171                         if (!name)
1172                                 return -ENOMEM;
1173                         if (!strcmp(name, "fs")) {
1174                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1175                         } else if (!strcmp(name, "user")) {
1176                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1177                         } else {
1178                                 kfree(name);
1179                                 return -EINVAL;
1180                         }
1181                         kfree(name);
1182                         break;
1183                 case Opt_compress_cache:
1184                         set_opt(sbi, COMPRESS_CACHE);
1185                         break;
1186 #else
1187                 case Opt_compress_algorithm:
1188                 case Opt_compress_log_size:
1189                 case Opt_compress_extension:
1190                 case Opt_nocompress_extension:
1191                 case Opt_compress_chksum:
1192                 case Opt_compress_mode:
1193                 case Opt_compress_cache:
1194                         f2fs_info(sbi, "compression options not supported");
1195                         break;
1196 #endif
1197                 case Opt_atgc:
1198                         set_opt(sbi, ATGC);
1199                         break;
1200                 case Opt_gc_merge:
1201                         set_opt(sbi, GC_MERGE);
1202                         break;
1203                 case Opt_nogc_merge:
1204                         clear_opt(sbi, GC_MERGE);
1205                         break;
1206                 case Opt_discard_unit:
1207                         name = match_strdup(&args[0]);
1208                         if (!name)
1209                                 return -ENOMEM;
1210                         if (!strcmp(name, "block")) {
1211                                 F2FS_OPTION(sbi).discard_unit =
1212                                                 DISCARD_UNIT_BLOCK;
1213                         } else if (!strcmp(name, "segment")) {
1214                                 F2FS_OPTION(sbi).discard_unit =
1215                                                 DISCARD_UNIT_SEGMENT;
1216                         } else if (!strcmp(name, "section")) {
1217                                 F2FS_OPTION(sbi).discard_unit =
1218                                                 DISCARD_UNIT_SECTION;
1219                         } else {
1220                                 kfree(name);
1221                                 return -EINVAL;
1222                         }
1223                         kfree(name);
1224                         break;
1225                 default:
1226                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1227                                  p);
1228                         return -EINVAL;
1229                 }
1230         }
1231 default_check:
1232 #ifdef CONFIG_QUOTA
1233         if (f2fs_check_quota_options(sbi))
1234                 return -EINVAL;
1235 #else
1236         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1237                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1238                 return -EINVAL;
1239         }
1240         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1241                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1242                 return -EINVAL;
1243         }
1244 #endif
1245 #if !IS_ENABLED(CONFIG_UNICODE)
1246         if (f2fs_sb_has_casefold(sbi)) {
1247                 f2fs_err(sbi,
1248                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1249                 return -EINVAL;
1250         }
1251 #endif
1252         /*
1253          * The BLKZONED feature indicates that the drive was formatted with
1254          * zone alignment optimization. This is optional for host-aware
1255          * devices, but mandatory for host-managed zoned block devices.
1256          */
1257 #ifndef CONFIG_BLK_DEV_ZONED
1258         if (f2fs_sb_has_blkzoned(sbi)) {
1259                 f2fs_err(sbi, "Zoned block device support is not enabled");
1260                 return -EINVAL;
1261         }
1262 #endif
1263         if (f2fs_sb_has_blkzoned(sbi)) {
1264                 if (F2FS_OPTION(sbi).discard_unit !=
1265                                                 DISCARD_UNIT_SECTION) {
1266                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1267                         F2FS_OPTION(sbi).discard_unit =
1268                                         DISCARD_UNIT_SECTION;
1269                 }
1270         }
1271
1272 #ifdef CONFIG_F2FS_FS_COMPRESSION
1273         if (f2fs_test_compress_extension(sbi)) {
1274                 f2fs_err(sbi, "invalid compress or nocompress extension");
1275                 return -EINVAL;
1276         }
1277 #endif
1278
1279         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1280                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1281                          F2FS_IO_SIZE_KB(sbi));
1282                 return -EINVAL;
1283         }
1284
1285         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1286                 int min_size, max_size;
1287
1288                 if (!f2fs_sb_has_extra_attr(sbi) ||
1289                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1290                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1291                         return -EINVAL;
1292                 }
1293                 if (!test_opt(sbi, INLINE_XATTR)) {
1294                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1295                         return -EINVAL;
1296                 }
1297
1298                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1299                 max_size = MAX_INLINE_XATTR_SIZE;
1300
1301                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1302                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1303                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1304                                  min_size, max_size);
1305                         return -EINVAL;
1306                 }
1307         }
1308
1309         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1310                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1311                 return -EINVAL;
1312         }
1313
1314         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1315                 f2fs_err(sbi, "Allow to mount readonly mode only");
1316                 return -EROFS;
1317         }
1318         return 0;
1319 }
1320
1321 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1322 {
1323         struct f2fs_inode_info *fi;
1324
1325         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC)) {
1326                 f2fs_show_injection_info(F2FS_SB(sb), FAULT_SLAB_ALLOC);
1327                 return NULL;
1328         }
1329
1330         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1331         if (!fi)
1332                 return NULL;
1333
1334         init_once((void *) fi);
1335
1336         /* Initialize f2fs-specific inode info */
1337         atomic_set(&fi->dirty_pages, 0);
1338         atomic_set(&fi->i_compr_blocks, 0);
1339         init_f2fs_rwsem(&fi->i_sem);
1340         spin_lock_init(&fi->i_size_lock);
1341         INIT_LIST_HEAD(&fi->dirty_list);
1342         INIT_LIST_HEAD(&fi->gdirty_list);
1343         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1344         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1345         init_f2fs_rwsem(&fi->i_xattr_sem);
1346
1347         /* Will be used by directory only */
1348         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1349
1350         return &fi->vfs_inode;
1351 }
1352
1353 static int f2fs_drop_inode(struct inode *inode)
1354 {
1355         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1356         int ret;
1357
1358         /*
1359          * during filesystem shutdown, if checkpoint is disabled,
1360          * drop useless meta/node dirty pages.
1361          */
1362         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1363                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1364                         inode->i_ino == F2FS_META_INO(sbi)) {
1365                         trace_f2fs_drop_inode(inode, 1);
1366                         return 1;
1367                 }
1368         }
1369
1370         /*
1371          * This is to avoid a deadlock condition like below.
1372          * writeback_single_inode(inode)
1373          *  - f2fs_write_data_page
1374          *    - f2fs_gc -> iput -> evict
1375          *       - inode_wait_for_writeback(inode)
1376          */
1377         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1378                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1379                         /* to avoid evict_inode call simultaneously */
1380                         atomic_inc(&inode->i_count);
1381                         spin_unlock(&inode->i_lock);
1382
1383                         if (f2fs_is_atomic_file(inode))
1384                                 f2fs_abort_atomic_write(inode, true);
1385
1386                         /* should remain fi->extent_tree for writepage */
1387                         f2fs_destroy_extent_node(inode);
1388
1389                         sb_start_intwrite(inode->i_sb);
1390                         f2fs_i_size_write(inode, 0);
1391
1392                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1393                                         inode, NULL, 0, DATA);
1394                         truncate_inode_pages_final(inode->i_mapping);
1395
1396                         if (F2FS_HAS_BLOCKS(inode))
1397                                 f2fs_truncate(inode);
1398
1399                         sb_end_intwrite(inode->i_sb);
1400
1401                         spin_lock(&inode->i_lock);
1402                         atomic_dec(&inode->i_count);
1403                 }
1404                 trace_f2fs_drop_inode(inode, 0);
1405                 return 0;
1406         }
1407         ret = generic_drop_inode(inode);
1408         if (!ret)
1409                 ret = fscrypt_drop_inode(inode);
1410         trace_f2fs_drop_inode(inode, ret);
1411         return ret;
1412 }
1413
1414 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1415 {
1416         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1417         int ret = 0;
1418
1419         spin_lock(&sbi->inode_lock[DIRTY_META]);
1420         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1421                 ret = 1;
1422         } else {
1423                 set_inode_flag(inode, FI_DIRTY_INODE);
1424                 stat_inc_dirty_inode(sbi, DIRTY_META);
1425         }
1426         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1427                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1428                                 &sbi->inode_list[DIRTY_META]);
1429                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1430         }
1431         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1432         return ret;
1433 }
1434
1435 void f2fs_inode_synced(struct inode *inode)
1436 {
1437         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1438
1439         spin_lock(&sbi->inode_lock[DIRTY_META]);
1440         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1441                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1442                 return;
1443         }
1444         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1445                 list_del_init(&F2FS_I(inode)->gdirty_list);
1446                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1447         }
1448         clear_inode_flag(inode, FI_DIRTY_INODE);
1449         clear_inode_flag(inode, FI_AUTO_RECOVER);
1450         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1451         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1452 }
1453
1454 /*
1455  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1456  *
1457  * We should call set_dirty_inode to write the dirty inode through write_inode.
1458  */
1459 static void f2fs_dirty_inode(struct inode *inode, int flags)
1460 {
1461         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1462
1463         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1464                         inode->i_ino == F2FS_META_INO(sbi))
1465                 return;
1466
1467         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1468                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1469
1470         f2fs_inode_dirtied(inode, false);
1471 }
1472
1473 static void f2fs_free_inode(struct inode *inode)
1474 {
1475         fscrypt_free_inode(inode);
1476         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1477 }
1478
1479 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1480 {
1481         percpu_counter_destroy(&sbi->total_valid_inode_count);
1482         percpu_counter_destroy(&sbi->rf_node_block_count);
1483         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1484 }
1485
1486 static void destroy_device_list(struct f2fs_sb_info *sbi)
1487 {
1488         int i;
1489
1490         for (i = 0; i < sbi->s_ndevs; i++) {
1491                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1492 #ifdef CONFIG_BLK_DEV_ZONED
1493                 kvfree(FDEV(i).blkz_seq);
1494                 kfree(FDEV(i).zone_capacity_blocks);
1495 #endif
1496         }
1497         kvfree(sbi->devs);
1498 }
1499
1500 static void f2fs_put_super(struct super_block *sb)
1501 {
1502         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1503         int i;
1504         bool dropped;
1505
1506         /* unregister procfs/sysfs entries in advance to avoid race case */
1507         f2fs_unregister_sysfs(sbi);
1508
1509         f2fs_quota_off_umount(sb);
1510
1511         /* prevent remaining shrinker jobs */
1512         mutex_lock(&sbi->umount_mutex);
1513
1514         /*
1515          * flush all issued checkpoints and stop checkpoint issue thread.
1516          * after then, all checkpoints should be done by each process context.
1517          */
1518         f2fs_stop_ckpt_thread(sbi);
1519
1520         /*
1521          * We don't need to do checkpoint when superblock is clean.
1522          * But, the previous checkpoint was not done by umount, it needs to do
1523          * clean checkpoint again.
1524          */
1525         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1526                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1527                 struct cp_control cpc = {
1528                         .reason = CP_UMOUNT,
1529                 };
1530                 f2fs_write_checkpoint(sbi, &cpc);
1531         }
1532
1533         /* be sure to wait for any on-going discard commands */
1534         dropped = f2fs_issue_discard_timeout(sbi);
1535
1536         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1537                                         !sbi->discard_blks && !dropped) {
1538                 struct cp_control cpc = {
1539                         .reason = CP_UMOUNT | CP_TRIMMED,
1540                 };
1541                 f2fs_write_checkpoint(sbi, &cpc);
1542         }
1543
1544         /*
1545          * normally superblock is clean, so we need to release this.
1546          * In addition, EIO will skip do checkpoint, we need this as well.
1547          */
1548         f2fs_release_ino_entry(sbi, true);
1549
1550         f2fs_leave_shrinker(sbi);
1551         mutex_unlock(&sbi->umount_mutex);
1552
1553         /* our cp_error case, we can wait for any writeback page */
1554         f2fs_flush_merged_writes(sbi);
1555
1556         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1557
1558         f2fs_bug_on(sbi, sbi->fsync_node_num);
1559
1560         f2fs_destroy_compress_inode(sbi);
1561
1562         iput(sbi->node_inode);
1563         sbi->node_inode = NULL;
1564
1565         iput(sbi->meta_inode);
1566         sbi->meta_inode = NULL;
1567
1568         /*
1569          * iput() can update stat information, if f2fs_write_checkpoint()
1570          * above failed with error.
1571          */
1572         f2fs_destroy_stats(sbi);
1573
1574         /* destroy f2fs internal modules */
1575         f2fs_destroy_node_manager(sbi);
1576         f2fs_destroy_segment_manager(sbi);
1577
1578         f2fs_destroy_post_read_wq(sbi);
1579
1580         kvfree(sbi->ckpt);
1581
1582         sb->s_fs_info = NULL;
1583         if (sbi->s_chksum_driver)
1584                 crypto_free_shash(sbi->s_chksum_driver);
1585         kfree(sbi->raw_super);
1586
1587         destroy_device_list(sbi);
1588         f2fs_destroy_page_array_cache(sbi);
1589         f2fs_destroy_xattr_caches(sbi);
1590         mempool_destroy(sbi->write_io_dummy);
1591 #ifdef CONFIG_QUOTA
1592         for (i = 0; i < MAXQUOTAS; i++)
1593                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1594 #endif
1595         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1596         destroy_percpu_info(sbi);
1597         f2fs_destroy_iostat(sbi);
1598         for (i = 0; i < NR_PAGE_TYPE; i++)
1599                 kvfree(sbi->write_io[i]);
1600 #if IS_ENABLED(CONFIG_UNICODE)
1601         utf8_unload(sb->s_encoding);
1602 #endif
1603         kfree(sbi);
1604 }
1605
1606 int f2fs_sync_fs(struct super_block *sb, int sync)
1607 {
1608         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1609         int err = 0;
1610
1611         if (unlikely(f2fs_cp_error(sbi)))
1612                 return 0;
1613         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1614                 return 0;
1615
1616         trace_f2fs_sync_fs(sb, sync);
1617
1618         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1619                 return -EAGAIN;
1620
1621         if (sync)
1622                 err = f2fs_issue_checkpoint(sbi);
1623
1624         return err;
1625 }
1626
1627 static int f2fs_freeze(struct super_block *sb)
1628 {
1629         if (f2fs_readonly(sb))
1630                 return 0;
1631
1632         /* IO error happened before */
1633         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1634                 return -EIO;
1635
1636         /* must be clean, since sync_filesystem() was already called */
1637         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1638                 return -EINVAL;
1639
1640         /* ensure no checkpoint required */
1641         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1642                 return -EINVAL;
1643
1644         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1645         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1646         return 0;
1647 }
1648
1649 static int f2fs_unfreeze(struct super_block *sb)
1650 {
1651         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1652         return 0;
1653 }
1654
1655 #ifdef CONFIG_QUOTA
1656 static int f2fs_statfs_project(struct super_block *sb,
1657                                 kprojid_t projid, struct kstatfs *buf)
1658 {
1659         struct kqid qid;
1660         struct dquot *dquot;
1661         u64 limit;
1662         u64 curblock;
1663
1664         qid = make_kqid_projid(projid);
1665         dquot = dqget(sb, qid);
1666         if (IS_ERR(dquot))
1667                 return PTR_ERR(dquot);
1668         spin_lock(&dquot->dq_dqb_lock);
1669
1670         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1671                                         dquot->dq_dqb.dqb_bhardlimit);
1672         if (limit)
1673                 limit >>= sb->s_blocksize_bits;
1674
1675         if (limit && buf->f_blocks > limit) {
1676                 curblock = (dquot->dq_dqb.dqb_curspace +
1677                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1678                 buf->f_blocks = limit;
1679                 buf->f_bfree = buf->f_bavail =
1680                         (buf->f_blocks > curblock) ?
1681                          (buf->f_blocks - curblock) : 0;
1682         }
1683
1684         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1685                                         dquot->dq_dqb.dqb_ihardlimit);
1686
1687         if (limit && buf->f_files > limit) {
1688                 buf->f_files = limit;
1689                 buf->f_ffree =
1690                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1691                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1692         }
1693
1694         spin_unlock(&dquot->dq_dqb_lock);
1695         dqput(dquot);
1696         return 0;
1697 }
1698 #endif
1699
1700 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1701 {
1702         struct super_block *sb = dentry->d_sb;
1703         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1704         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1705         block_t total_count, user_block_count, start_count;
1706         u64 avail_node_count;
1707         unsigned int total_valid_node_count;
1708
1709         total_count = le64_to_cpu(sbi->raw_super->block_count);
1710         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1711         buf->f_type = F2FS_SUPER_MAGIC;
1712         buf->f_bsize = sbi->blocksize;
1713
1714         buf->f_blocks = total_count - start_count;
1715
1716         spin_lock(&sbi->stat_lock);
1717
1718         user_block_count = sbi->user_block_count;
1719         total_valid_node_count = valid_node_count(sbi);
1720         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1721         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1722                                                 sbi->current_reserved_blocks;
1723
1724         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1725                 buf->f_bfree = 0;
1726         else
1727                 buf->f_bfree -= sbi->unusable_block_count;
1728         spin_unlock(&sbi->stat_lock);
1729
1730         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1731                 buf->f_bavail = buf->f_bfree -
1732                                 F2FS_OPTION(sbi).root_reserved_blocks;
1733         else
1734                 buf->f_bavail = 0;
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 - total_valid_node_count,
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 = sbi->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         /* check if we need more GC first */
2070         unusable = f2fs_get_unusable_blocks(sbi);
2071         if (!f2fs_disable_cp_again(sbi, unusable))
2072                 goto skip_gc;
2073
2074         f2fs_update_time(sbi, DISABLE_TIME);
2075
2076         sbi->gc_mode = GC_URGENT_HIGH;
2077
2078         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2079                 struct f2fs_gc_control gc_control = {
2080                         .victim_segno = NULL_SEGNO,
2081                         .init_gc_type = FG_GC,
2082                         .should_migrate_blocks = false,
2083                         .err_gc_skipped = true,
2084                         .nr_free_secs = 1 };
2085
2086                 f2fs_down_write(&sbi->gc_lock);
2087                 err = f2fs_gc(sbi, &gc_control);
2088                 if (err == -ENODATA) {
2089                         err = 0;
2090                         break;
2091                 }
2092                 if (err && err != -EAGAIN)
2093                         break;
2094         }
2095
2096         ret = sync_filesystem(sbi->sb);
2097         if (ret || err) {
2098                 err = ret ? ret : err;
2099                 goto restore_flag;
2100         }
2101
2102         unusable = f2fs_get_unusable_blocks(sbi);
2103         if (f2fs_disable_cp_again(sbi, unusable)) {
2104                 err = -EAGAIN;
2105                 goto restore_flag;
2106         }
2107
2108 skip_gc:
2109         f2fs_down_write(&sbi->gc_lock);
2110         cpc.reason = CP_PAUSE;
2111         set_sbi_flag(sbi, SBI_CP_DISABLED);
2112         err = f2fs_write_checkpoint(sbi, &cpc);
2113         if (err)
2114                 goto out_unlock;
2115
2116         spin_lock(&sbi->stat_lock);
2117         sbi->unusable_block_count = unusable;
2118         spin_unlock(&sbi->stat_lock);
2119
2120 out_unlock:
2121         f2fs_up_write(&sbi->gc_lock);
2122 restore_flag:
2123         sbi->gc_mode = gc_mode;
2124         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2125         return err;
2126 }
2127
2128 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2129 {
2130         int retry = DEFAULT_RETRY_IO_COUNT;
2131
2132         /* we should flush all the data to keep data consistency */
2133         do {
2134                 sync_inodes_sb(sbi->sb);
2135                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2136         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2137
2138         if (unlikely(retry < 0))
2139                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2140
2141         f2fs_down_write(&sbi->gc_lock);
2142         f2fs_dirty_to_prefree(sbi);
2143
2144         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2145         set_sbi_flag(sbi, SBI_IS_DIRTY);
2146         f2fs_up_write(&sbi->gc_lock);
2147
2148         f2fs_sync_fs(sbi->sb, 1);
2149 }
2150
2151 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2152 {
2153         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2154         struct f2fs_mount_info org_mount_opt;
2155         unsigned long old_sb_flags;
2156         int err;
2157         bool need_restart_gc = false, need_stop_gc = false;
2158         bool need_restart_ckpt = false, need_stop_ckpt = false;
2159         bool need_restart_flush = false, need_stop_flush = false;
2160         bool need_restart_discard = false, need_stop_discard = false;
2161         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2162         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2163         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2164         bool no_atgc = !test_opt(sbi, ATGC);
2165         bool no_discard = !test_opt(sbi, DISCARD);
2166         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2167         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2168         struct discard_cmd_control *dcc;
2169 #ifdef CONFIG_QUOTA
2170         int i, j;
2171 #endif
2172
2173         /*
2174          * Save the old mount options in case we
2175          * need to restore them.
2176          */
2177         org_mount_opt = sbi->mount_opt;
2178         old_sb_flags = sb->s_flags;
2179
2180 #ifdef CONFIG_QUOTA
2181         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2182         for (i = 0; i < MAXQUOTAS; i++) {
2183                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2184                         org_mount_opt.s_qf_names[i] =
2185                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2186                                 GFP_KERNEL);
2187                         if (!org_mount_opt.s_qf_names[i]) {
2188                                 for (j = 0; j < i; j++)
2189                                         kfree(org_mount_opt.s_qf_names[j]);
2190                                 return -ENOMEM;
2191                         }
2192                 } else {
2193                         org_mount_opt.s_qf_names[i] = NULL;
2194                 }
2195         }
2196 #endif
2197
2198         /* recover superblocks we couldn't write due to previous RO mount */
2199         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2200                 err = f2fs_commit_super(sbi, false);
2201                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2202                           err);
2203                 if (!err)
2204                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2205         }
2206
2207         default_options(sbi);
2208
2209         /* parse mount options */
2210         err = parse_options(sb, data, true);
2211         if (err)
2212                 goto restore_opts;
2213
2214         /*
2215          * Previous and new state of filesystem is RO,
2216          * so skip checking GC and FLUSH_MERGE conditions.
2217          */
2218         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2219                 goto skip;
2220
2221         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2222                 err = -EROFS;
2223                 goto restore_opts;
2224         }
2225
2226 #ifdef CONFIG_QUOTA
2227         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2228                 err = dquot_suspend(sb, -1);
2229                 if (err < 0)
2230                         goto restore_opts;
2231         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2232                 /* dquot_resume needs RW */
2233                 sb->s_flags &= ~SB_RDONLY;
2234                 if (sb_any_quota_suspended(sb)) {
2235                         dquot_resume(sb, -1);
2236                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2237                         err = f2fs_enable_quotas(sb);
2238                         if (err)
2239                                 goto restore_opts;
2240                 }
2241         }
2242 #endif
2243         /* disallow enable atgc dynamically */
2244         if (no_atgc == !!test_opt(sbi, ATGC)) {
2245                 err = -EINVAL;
2246                 f2fs_warn(sbi, "switch atgc option is not allowed");
2247                 goto restore_opts;
2248         }
2249
2250         /* disallow enable/disable extent_cache dynamically */
2251         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2252                 err = -EINVAL;
2253                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2254                 goto restore_opts;
2255         }
2256
2257         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2258                 err = -EINVAL;
2259                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2260                 goto restore_opts;
2261         }
2262
2263         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2264                 err = -EINVAL;
2265                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2266                 goto restore_opts;
2267         }
2268
2269         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2270                 err = -EINVAL;
2271                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2272                 goto restore_opts;
2273         }
2274
2275         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2276                 err = -EINVAL;
2277                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2278                 goto restore_opts;
2279         }
2280
2281         /*
2282          * We stop the GC thread if FS is mounted as RO
2283          * or if background_gc = off is passed in mount
2284          * option. Also sync the filesystem.
2285          */
2286         if ((*flags & SB_RDONLY) ||
2287                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2288                         !test_opt(sbi, GC_MERGE))) {
2289                 if (sbi->gc_thread) {
2290                         f2fs_stop_gc_thread(sbi);
2291                         need_restart_gc = true;
2292                 }
2293         } else if (!sbi->gc_thread) {
2294                 err = f2fs_start_gc_thread(sbi);
2295                 if (err)
2296                         goto restore_opts;
2297                 need_stop_gc = true;
2298         }
2299
2300         if (*flags & SB_RDONLY) {
2301                 sync_inodes_sb(sb);
2302
2303                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2304                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2305                 f2fs_sync_fs(sb, 1);
2306                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2307         }
2308
2309         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2310                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2311                 f2fs_stop_ckpt_thread(sbi);
2312                 need_restart_ckpt = true;
2313         } else {
2314                 err = f2fs_start_ckpt_thread(sbi);
2315                 if (err) {
2316                         f2fs_err(sbi,
2317                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2318                             err);
2319                         goto restore_gc;
2320                 }
2321                 need_stop_ckpt = true;
2322         }
2323
2324         /*
2325          * We stop issue flush thread if FS is mounted as RO
2326          * or if flush_merge is not passed in mount option.
2327          */
2328         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2329                 clear_opt(sbi, FLUSH_MERGE);
2330                 f2fs_destroy_flush_cmd_control(sbi, false);
2331                 need_restart_flush = true;
2332         } else {
2333                 err = f2fs_create_flush_cmd_control(sbi);
2334                 if (err)
2335                         goto restore_ckpt;
2336                 need_stop_flush = true;
2337         }
2338
2339         if (no_discard == !!test_opt(sbi, DISCARD)) {
2340                 if (test_opt(sbi, DISCARD)) {
2341                         err = f2fs_start_discard_thread(sbi);
2342                         if (err)
2343                                 goto restore_flush;
2344                         need_stop_discard = true;
2345                 } else {
2346                         dcc = SM_I(sbi)->dcc_info;
2347                         f2fs_stop_discard_thread(sbi);
2348                         if (atomic_read(&dcc->discard_cmd_cnt))
2349                                 f2fs_issue_discard_timeout(sbi);
2350                         need_restart_discard = true;
2351                 }
2352         }
2353
2354         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2355                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2356                         err = f2fs_disable_checkpoint(sbi);
2357                         if (err)
2358                                 goto restore_discard;
2359                 } else {
2360                         f2fs_enable_checkpoint(sbi);
2361                 }
2362         }
2363
2364 skip:
2365 #ifdef CONFIG_QUOTA
2366         /* Release old quota file names */
2367         for (i = 0; i < MAXQUOTAS; i++)
2368                 kfree(org_mount_opt.s_qf_names[i]);
2369 #endif
2370         /* Update the POSIXACL Flag */
2371         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2372                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2373
2374         limit_reserve_root(sbi);
2375         adjust_unusable_cap_perc(sbi);
2376         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2377         return 0;
2378 restore_discard:
2379         if (need_restart_discard) {
2380                 if (f2fs_start_discard_thread(sbi))
2381                         f2fs_warn(sbi, "discard has been stopped");
2382         } else if (need_stop_discard) {
2383                 f2fs_stop_discard_thread(sbi);
2384         }
2385 restore_flush:
2386         if (need_restart_flush) {
2387                 if (f2fs_create_flush_cmd_control(sbi))
2388                         f2fs_warn(sbi, "background flush thread has stopped");
2389         } else if (need_stop_flush) {
2390                 clear_opt(sbi, FLUSH_MERGE);
2391                 f2fs_destroy_flush_cmd_control(sbi, false);
2392         }
2393 restore_ckpt:
2394         if (need_restart_ckpt) {
2395                 if (f2fs_start_ckpt_thread(sbi))
2396                         f2fs_warn(sbi, "background ckpt thread has stopped");
2397         } else if (need_stop_ckpt) {
2398                 f2fs_stop_ckpt_thread(sbi);
2399         }
2400 restore_gc:
2401         if (need_restart_gc) {
2402                 if (f2fs_start_gc_thread(sbi))
2403                         f2fs_warn(sbi, "background gc thread has stopped");
2404         } else if (need_stop_gc) {
2405                 f2fs_stop_gc_thread(sbi);
2406         }
2407 restore_opts:
2408 #ifdef CONFIG_QUOTA
2409         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2410         for (i = 0; i < MAXQUOTAS; i++) {
2411                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2412                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2413         }
2414 #endif
2415         sbi->mount_opt = org_mount_opt;
2416         sb->s_flags = old_sb_flags;
2417         return err;
2418 }
2419
2420 #ifdef CONFIG_QUOTA
2421 /* Read data from quotafile */
2422 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2423                                size_t len, loff_t off)
2424 {
2425         struct inode *inode = sb_dqopt(sb)->files[type];
2426         struct address_space *mapping = inode->i_mapping;
2427         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2428         int offset = off & (sb->s_blocksize - 1);
2429         int tocopy;
2430         size_t toread;
2431         loff_t i_size = i_size_read(inode);
2432         struct page *page;
2433         char *kaddr;
2434
2435         if (off > i_size)
2436                 return 0;
2437
2438         if (off + len > i_size)
2439                 len = i_size - off;
2440         toread = len;
2441         while (toread > 0) {
2442                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2443 repeat:
2444                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2445                 if (IS_ERR(page)) {
2446                         if (PTR_ERR(page) == -ENOMEM) {
2447                                 memalloc_retry_wait(GFP_NOFS);
2448                                 goto repeat;
2449                         }
2450                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2451                         return PTR_ERR(page);
2452                 }
2453
2454                 lock_page(page);
2455
2456                 if (unlikely(page->mapping != mapping)) {
2457                         f2fs_put_page(page, 1);
2458                         goto repeat;
2459                 }
2460                 if (unlikely(!PageUptodate(page))) {
2461                         f2fs_put_page(page, 1);
2462                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2463                         return -EIO;
2464                 }
2465
2466                 kaddr = kmap_atomic(page);
2467                 memcpy(data, kaddr + offset, tocopy);
2468                 kunmap_atomic(kaddr);
2469                 f2fs_put_page(page, 1);
2470
2471                 offset = 0;
2472                 toread -= tocopy;
2473                 data += tocopy;
2474                 blkidx++;
2475         }
2476         return len;
2477 }
2478
2479 /* Write to quotafile */
2480 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2481                                 const char *data, size_t len, loff_t off)
2482 {
2483         struct inode *inode = sb_dqopt(sb)->files[type];
2484         struct address_space *mapping = inode->i_mapping;
2485         const struct address_space_operations *a_ops = mapping->a_ops;
2486         int offset = off & (sb->s_blocksize - 1);
2487         size_t towrite = len;
2488         struct page *page;
2489         void *fsdata = NULL;
2490         char *kaddr;
2491         int err = 0;
2492         int tocopy;
2493
2494         while (towrite > 0) {
2495                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2496                                                                 towrite);
2497 retry:
2498                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2499                                                         &page, &fsdata);
2500                 if (unlikely(err)) {
2501                         if (err == -ENOMEM) {
2502                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2503                                 goto retry;
2504                         }
2505                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2506                         break;
2507                 }
2508
2509                 kaddr = kmap_atomic(page);
2510                 memcpy(kaddr + offset, data, tocopy);
2511                 kunmap_atomic(kaddr);
2512                 flush_dcache_page(page);
2513
2514                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2515                                                 page, fsdata);
2516                 offset = 0;
2517                 towrite -= tocopy;
2518                 off += tocopy;
2519                 data += tocopy;
2520                 cond_resched();
2521         }
2522
2523         if (len == towrite)
2524                 return err;
2525         inode->i_mtime = inode->i_ctime = current_time(inode);
2526         f2fs_mark_inode_dirty_sync(inode, false);
2527         return len - towrite;
2528 }
2529
2530 int f2fs_dquot_initialize(struct inode *inode)
2531 {
2532         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2533                 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2534                 return -ESRCH;
2535         }
2536
2537         return dquot_initialize(inode);
2538 }
2539
2540 static struct dquot **f2fs_get_dquots(struct inode *inode)
2541 {
2542         return F2FS_I(inode)->i_dquot;
2543 }
2544
2545 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2546 {
2547         return &F2FS_I(inode)->i_reserved_quota;
2548 }
2549
2550 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2551 {
2552         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2553                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2554                 return 0;
2555         }
2556
2557         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2558                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2559 }
2560
2561 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2562 {
2563         int enabled = 0;
2564         int i, err;
2565
2566         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2567                 err = f2fs_enable_quotas(sbi->sb);
2568                 if (err) {
2569                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2570                         return 0;
2571                 }
2572                 return 1;
2573         }
2574
2575         for (i = 0; i < MAXQUOTAS; i++) {
2576                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2577                         err = f2fs_quota_on_mount(sbi, i);
2578                         if (!err) {
2579                                 enabled = 1;
2580                                 continue;
2581                         }
2582                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2583                                  err, i);
2584                 }
2585         }
2586         return enabled;
2587 }
2588
2589 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2590                              unsigned int flags)
2591 {
2592         struct inode *qf_inode;
2593         unsigned long qf_inum;
2594         int err;
2595
2596         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2597
2598         qf_inum = f2fs_qf_ino(sb, type);
2599         if (!qf_inum)
2600                 return -EPERM;
2601
2602         qf_inode = f2fs_iget(sb, qf_inum);
2603         if (IS_ERR(qf_inode)) {
2604                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2605                 return PTR_ERR(qf_inode);
2606         }
2607
2608         /* Don't account quota for quota files to avoid recursion */
2609         qf_inode->i_flags |= S_NOQUOTA;
2610         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2611         iput(qf_inode);
2612         return err;
2613 }
2614
2615 static int f2fs_enable_quotas(struct super_block *sb)
2616 {
2617         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2618         int type, err = 0;
2619         unsigned long qf_inum;
2620         bool quota_mopt[MAXQUOTAS] = {
2621                 test_opt(sbi, USRQUOTA),
2622                 test_opt(sbi, GRPQUOTA),
2623                 test_opt(sbi, PRJQUOTA),
2624         };
2625
2626         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2627                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2628                 return 0;
2629         }
2630
2631         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2632
2633         for (type = 0; type < MAXQUOTAS; type++) {
2634                 qf_inum = f2fs_qf_ino(sb, type);
2635                 if (qf_inum) {
2636                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2637                                 DQUOT_USAGE_ENABLED |
2638                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2639                         if (err) {
2640                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2641                                          type, err);
2642                                 for (type--; type >= 0; type--)
2643                                         dquot_quota_off(sb, type);
2644                                 set_sbi_flag(F2FS_SB(sb),
2645                                                 SBI_QUOTA_NEED_REPAIR);
2646                                 return err;
2647                         }
2648                 }
2649         }
2650         return 0;
2651 }
2652
2653 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2654 {
2655         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2656         struct address_space *mapping = dqopt->files[type]->i_mapping;
2657         int ret = 0;
2658
2659         ret = dquot_writeback_dquots(sbi->sb, type);
2660         if (ret)
2661                 goto out;
2662
2663         ret = filemap_fdatawrite(mapping);
2664         if (ret)
2665                 goto out;
2666
2667         /* if we are using journalled quota */
2668         if (is_journalled_quota(sbi))
2669                 goto out;
2670
2671         ret = filemap_fdatawait(mapping);
2672
2673         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2674 out:
2675         if (ret)
2676                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2677         return ret;
2678 }
2679
2680 int f2fs_quota_sync(struct super_block *sb, int type)
2681 {
2682         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2683         struct quota_info *dqopt = sb_dqopt(sb);
2684         int cnt;
2685         int ret = 0;
2686
2687         /*
2688          * Now when everything is written we can discard the pagecache so
2689          * that userspace sees the changes.
2690          */
2691         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2692
2693                 if (type != -1 && cnt != type)
2694                         continue;
2695
2696                 if (!sb_has_quota_active(sb, cnt))
2697                         continue;
2698
2699                 if (!f2fs_sb_has_quota_ino(sbi))
2700                         inode_lock(dqopt->files[cnt]);
2701
2702                 /*
2703                  * do_quotactl
2704                  *  f2fs_quota_sync
2705                  *  f2fs_down_read(quota_sem)
2706                  *  dquot_writeback_dquots()
2707                  *  f2fs_dquot_commit
2708                  *                            block_operation
2709                  *                            f2fs_down_read(quota_sem)
2710                  */
2711                 f2fs_lock_op(sbi);
2712                 f2fs_down_read(&sbi->quota_sem);
2713
2714                 ret = f2fs_quota_sync_file(sbi, cnt);
2715
2716                 f2fs_up_read(&sbi->quota_sem);
2717                 f2fs_unlock_op(sbi);
2718
2719                 if (!f2fs_sb_has_quota_ino(sbi))
2720                         inode_unlock(dqopt->files[cnt]);
2721
2722                 if (ret)
2723                         break;
2724         }
2725         return ret;
2726 }
2727
2728 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2729                                                         const struct path *path)
2730 {
2731         struct inode *inode;
2732         int err;
2733
2734         /* if quota sysfile exists, deny enabling quota with specific file */
2735         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2736                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2737                 return -EBUSY;
2738         }
2739
2740         err = f2fs_quota_sync(sb, type);
2741         if (err)
2742                 return err;
2743
2744         err = dquot_quota_on(sb, type, format_id, path);
2745         if (err)
2746                 return err;
2747
2748         inode = d_inode(path->dentry);
2749
2750         inode_lock(inode);
2751         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2752         f2fs_set_inode_flags(inode);
2753         inode_unlock(inode);
2754         f2fs_mark_inode_dirty_sync(inode, false);
2755
2756         return 0;
2757 }
2758
2759 static int __f2fs_quota_off(struct super_block *sb, int type)
2760 {
2761         struct inode *inode = sb_dqopt(sb)->files[type];
2762         int err;
2763
2764         if (!inode || !igrab(inode))
2765                 return dquot_quota_off(sb, type);
2766
2767         err = f2fs_quota_sync(sb, type);
2768         if (err)
2769                 goto out_put;
2770
2771         err = dquot_quota_off(sb, type);
2772         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2773                 goto out_put;
2774
2775         inode_lock(inode);
2776         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2777         f2fs_set_inode_flags(inode);
2778         inode_unlock(inode);
2779         f2fs_mark_inode_dirty_sync(inode, false);
2780 out_put:
2781         iput(inode);
2782         return err;
2783 }
2784
2785 static int f2fs_quota_off(struct super_block *sb, int type)
2786 {
2787         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2788         int err;
2789
2790         err = __f2fs_quota_off(sb, type);
2791
2792         /*
2793          * quotactl can shutdown journalled quota, result in inconsistence
2794          * between quota record and fs data by following updates, tag the
2795          * flag to let fsck be aware of it.
2796          */
2797         if (is_journalled_quota(sbi))
2798                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2799         return err;
2800 }
2801
2802 void f2fs_quota_off_umount(struct super_block *sb)
2803 {
2804         int type;
2805         int err;
2806
2807         for (type = 0; type < MAXQUOTAS; type++) {
2808                 err = __f2fs_quota_off(sb, type);
2809                 if (err) {
2810                         int ret = dquot_quota_off(sb, type);
2811
2812                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2813                                  type, err, ret);
2814                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2815                 }
2816         }
2817         /*
2818          * In case of checkpoint=disable, we must flush quota blocks.
2819          * This can cause NULL exception for node_inode in end_io, since
2820          * put_super already dropped it.
2821          */
2822         sync_filesystem(sb);
2823 }
2824
2825 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2826 {
2827         struct quota_info *dqopt = sb_dqopt(sb);
2828         int type;
2829
2830         for (type = 0; type < MAXQUOTAS; type++) {
2831                 if (!dqopt->files[type])
2832                         continue;
2833                 f2fs_inode_synced(dqopt->files[type]);
2834         }
2835 }
2836
2837 static int f2fs_dquot_commit(struct dquot *dquot)
2838 {
2839         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2840         int ret;
2841
2842         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2843         ret = dquot_commit(dquot);
2844         if (ret < 0)
2845                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2846         f2fs_up_read(&sbi->quota_sem);
2847         return ret;
2848 }
2849
2850 static int f2fs_dquot_acquire(struct dquot *dquot)
2851 {
2852         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2853         int ret;
2854
2855         f2fs_down_read(&sbi->quota_sem);
2856         ret = dquot_acquire(dquot);
2857         if (ret < 0)
2858                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2859         f2fs_up_read(&sbi->quota_sem);
2860         return ret;
2861 }
2862
2863 static int f2fs_dquot_release(struct dquot *dquot)
2864 {
2865         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2866         int ret = dquot_release(dquot);
2867
2868         if (ret < 0)
2869                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2870         return ret;
2871 }
2872
2873 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2874 {
2875         struct super_block *sb = dquot->dq_sb;
2876         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2877         int ret = dquot_mark_dquot_dirty(dquot);
2878
2879         /* if we are using journalled quota */
2880         if (is_journalled_quota(sbi))
2881                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2882
2883         return ret;
2884 }
2885
2886 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2887 {
2888         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2889         int ret = dquot_commit_info(sb, type);
2890
2891         if (ret < 0)
2892                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2893         return ret;
2894 }
2895
2896 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2897 {
2898         *projid = F2FS_I(inode)->i_projid;
2899         return 0;
2900 }
2901
2902 static const struct dquot_operations f2fs_quota_operations = {
2903         .get_reserved_space = f2fs_get_reserved_space,
2904         .write_dquot    = f2fs_dquot_commit,
2905         .acquire_dquot  = f2fs_dquot_acquire,
2906         .release_dquot  = f2fs_dquot_release,
2907         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2908         .write_info     = f2fs_dquot_commit_info,
2909         .alloc_dquot    = dquot_alloc,
2910         .destroy_dquot  = dquot_destroy,
2911         .get_projid     = f2fs_get_projid,
2912         .get_next_id    = dquot_get_next_id,
2913 };
2914
2915 static const struct quotactl_ops f2fs_quotactl_ops = {
2916         .quota_on       = f2fs_quota_on,
2917         .quota_off      = f2fs_quota_off,
2918         .quota_sync     = f2fs_quota_sync,
2919         .get_state      = dquot_get_state,
2920         .set_info       = dquot_set_dqinfo,
2921         .get_dqblk      = dquot_get_dqblk,
2922         .set_dqblk      = dquot_set_dqblk,
2923         .get_nextdqblk  = dquot_get_next_dqblk,
2924 };
2925 #else
2926 int f2fs_dquot_initialize(struct inode *inode)
2927 {
2928         return 0;
2929 }
2930
2931 int f2fs_quota_sync(struct super_block *sb, int type)
2932 {
2933         return 0;
2934 }
2935
2936 void f2fs_quota_off_umount(struct super_block *sb)
2937 {
2938 }
2939 #endif
2940
2941 static const struct super_operations f2fs_sops = {
2942         .alloc_inode    = f2fs_alloc_inode,
2943         .free_inode     = f2fs_free_inode,
2944         .drop_inode     = f2fs_drop_inode,
2945         .write_inode    = f2fs_write_inode,
2946         .dirty_inode    = f2fs_dirty_inode,
2947         .show_options   = f2fs_show_options,
2948 #ifdef CONFIG_QUOTA
2949         .quota_read     = f2fs_quota_read,
2950         .quota_write    = f2fs_quota_write,
2951         .get_dquots     = f2fs_get_dquots,
2952 #endif
2953         .evict_inode    = f2fs_evict_inode,
2954         .put_super      = f2fs_put_super,
2955         .sync_fs        = f2fs_sync_fs,
2956         .freeze_fs      = f2fs_freeze,
2957         .unfreeze_fs    = f2fs_unfreeze,
2958         .statfs         = f2fs_statfs,
2959         .remount_fs     = f2fs_remount,
2960 };
2961
2962 #ifdef CONFIG_FS_ENCRYPTION
2963 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2964 {
2965         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2966                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2967                                 ctx, len, NULL);
2968 }
2969
2970 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2971                                                         void *fs_data)
2972 {
2973         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2974
2975         /*
2976          * Encrypting the root directory is not allowed because fsck
2977          * expects lost+found directory to exist and remain unencrypted
2978          * if LOST_FOUND feature is enabled.
2979          *
2980          */
2981         if (f2fs_sb_has_lost_found(sbi) &&
2982                         inode->i_ino == F2FS_ROOT_INO(sbi))
2983                 return -EPERM;
2984
2985         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2986                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2987                                 ctx, len, fs_data, XATTR_CREATE);
2988 }
2989
2990 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2991 {
2992         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2993 }
2994
2995 static bool f2fs_has_stable_inodes(struct super_block *sb)
2996 {
2997         return true;
2998 }
2999
3000 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3001                                        int *ino_bits_ret, int *lblk_bits_ret)
3002 {
3003         *ino_bits_ret = 8 * sizeof(nid_t);
3004         *lblk_bits_ret = 8 * sizeof(block_t);
3005 }
3006
3007 static int f2fs_get_num_devices(struct super_block *sb)
3008 {
3009         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3010
3011         if (f2fs_is_multi_device(sbi))
3012                 return sbi->s_ndevs;
3013         return 1;
3014 }
3015
3016 static void f2fs_get_devices(struct super_block *sb,
3017                              struct request_queue **devs)
3018 {
3019         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3020         int i;
3021
3022         for (i = 0; i < sbi->s_ndevs; i++)
3023                 devs[i] = bdev_get_queue(FDEV(i).bdev);
3024 }
3025
3026 static const struct fscrypt_operations f2fs_cryptops = {
3027         .key_prefix             = "f2fs:",
3028         .get_context            = f2fs_get_context,
3029         .set_context            = f2fs_set_context,
3030         .get_dummy_policy       = f2fs_get_dummy_policy,
3031         .empty_dir              = f2fs_empty_dir,
3032         .has_stable_inodes      = f2fs_has_stable_inodes,
3033         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3034         .get_num_devices        = f2fs_get_num_devices,
3035         .get_devices            = f2fs_get_devices,
3036 };
3037 #endif
3038
3039 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3040                 u64 ino, u32 generation)
3041 {
3042         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3043         struct inode *inode;
3044
3045         if (f2fs_check_nid_range(sbi, ino))
3046                 return ERR_PTR(-ESTALE);
3047
3048         /*
3049          * f2fs_iget isn't quite right if the inode is currently unallocated!
3050          * However f2fs_iget currently does appropriate checks to handle stale
3051          * inodes so everything is OK.
3052          */
3053         inode = f2fs_iget(sb, ino);
3054         if (IS_ERR(inode))
3055                 return ERR_CAST(inode);
3056         if (unlikely(generation && inode->i_generation != generation)) {
3057                 /* we didn't find the right inode.. */
3058                 iput(inode);
3059                 return ERR_PTR(-ESTALE);
3060         }
3061         return inode;
3062 }
3063
3064 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3065                 int fh_len, int fh_type)
3066 {
3067         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3068                                     f2fs_nfs_get_inode);
3069 }
3070
3071 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3072                 int fh_len, int fh_type)
3073 {
3074         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3075                                     f2fs_nfs_get_inode);
3076 }
3077
3078 static const struct export_operations f2fs_export_ops = {
3079         .fh_to_dentry = f2fs_fh_to_dentry,
3080         .fh_to_parent = f2fs_fh_to_parent,
3081         .get_parent = f2fs_get_parent,
3082 };
3083
3084 loff_t max_file_blocks(struct inode *inode)
3085 {
3086         loff_t result = 0;
3087         loff_t leaf_count;
3088
3089         /*
3090          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3091          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3092          * space in inode.i_addr, it will be more safe to reassign
3093          * result as zero.
3094          */
3095
3096         if (inode && f2fs_compressed_file(inode))
3097                 leaf_count = ADDRS_PER_BLOCK(inode);
3098         else
3099                 leaf_count = DEF_ADDRS_PER_BLOCK;
3100
3101         /* two direct node blocks */
3102         result += (leaf_count * 2);
3103
3104         /* two indirect node blocks */
3105         leaf_count *= NIDS_PER_BLOCK;
3106         result += (leaf_count * 2);
3107
3108         /* one double indirect node block */
3109         leaf_count *= NIDS_PER_BLOCK;
3110         result += leaf_count;
3111
3112         return result;
3113 }
3114
3115 static int __f2fs_commit_super(struct buffer_head *bh,
3116                         struct f2fs_super_block *super)
3117 {
3118         lock_buffer(bh);
3119         if (super)
3120                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3121         set_buffer_dirty(bh);
3122         unlock_buffer(bh);
3123
3124         /* it's rare case, we can do fua all the time */
3125         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3126 }
3127
3128 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3129                                         struct buffer_head *bh)
3130 {
3131         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3132                                         (bh->b_data + F2FS_SUPER_OFFSET);
3133         struct super_block *sb = sbi->sb;
3134         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3135         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3136         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3137         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3138         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3139         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3140         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3141         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3142         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3143         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3144         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3145         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3146         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3147         u64 main_end_blkaddr = main_blkaddr +
3148                                 (segment_count_main << log_blocks_per_seg);
3149         u64 seg_end_blkaddr = segment0_blkaddr +
3150                                 (segment_count << log_blocks_per_seg);
3151
3152         if (segment0_blkaddr != cp_blkaddr) {
3153                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3154                           segment0_blkaddr, cp_blkaddr);
3155                 return true;
3156         }
3157
3158         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3159                                                         sit_blkaddr) {
3160                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3161                           cp_blkaddr, sit_blkaddr,
3162                           segment_count_ckpt << log_blocks_per_seg);
3163                 return true;
3164         }
3165
3166         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3167                                                         nat_blkaddr) {
3168                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3169                           sit_blkaddr, nat_blkaddr,
3170                           segment_count_sit << log_blocks_per_seg);
3171                 return true;
3172         }
3173
3174         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3175                                                         ssa_blkaddr) {
3176                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3177                           nat_blkaddr, ssa_blkaddr,
3178                           segment_count_nat << log_blocks_per_seg);
3179                 return true;
3180         }
3181
3182         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3183                                                         main_blkaddr) {
3184                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3185                           ssa_blkaddr, main_blkaddr,
3186                           segment_count_ssa << log_blocks_per_seg);
3187                 return true;
3188         }
3189
3190         if (main_end_blkaddr > seg_end_blkaddr) {
3191                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3192                           main_blkaddr, seg_end_blkaddr,
3193                           segment_count_main << log_blocks_per_seg);
3194                 return true;
3195         } else if (main_end_blkaddr < seg_end_blkaddr) {
3196                 int err = 0;
3197                 char *res;
3198
3199                 /* fix in-memory information all the time */
3200                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3201                                 segment0_blkaddr) >> log_blocks_per_seg);
3202
3203                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3204                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3205                         res = "internally";
3206                 } else {
3207                         err = __f2fs_commit_super(bh, NULL);
3208                         res = err ? "failed" : "done";
3209                 }
3210                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3211                           res, main_blkaddr, seg_end_blkaddr,
3212                           segment_count_main << log_blocks_per_seg);
3213                 if (err)
3214                         return true;
3215         }
3216         return false;
3217 }
3218
3219 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3220                                 struct buffer_head *bh)
3221 {
3222         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3223         block_t total_sections, blocks_per_seg;
3224         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3225                                         (bh->b_data + F2FS_SUPER_OFFSET);
3226         size_t crc_offset = 0;
3227         __u32 crc = 0;
3228
3229         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3230                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3231                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3232                 return -EINVAL;
3233         }
3234
3235         /* Check checksum_offset and crc in superblock */
3236         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3237                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3238                 if (crc_offset !=
3239                         offsetof(struct f2fs_super_block, crc)) {
3240                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3241                                   crc_offset);
3242                         return -EFSCORRUPTED;
3243                 }
3244                 crc = le32_to_cpu(raw_super->crc);
3245                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3246                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3247                         return -EFSCORRUPTED;
3248                 }
3249         }
3250
3251         /* Currently, support only 4KB block size */
3252         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3253                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3254                           le32_to_cpu(raw_super->log_blocksize),
3255                           F2FS_BLKSIZE_BITS);
3256                 return -EFSCORRUPTED;
3257         }
3258
3259         /* check log blocks per segment */
3260         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3261                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3262                           le32_to_cpu(raw_super->log_blocks_per_seg));
3263                 return -EFSCORRUPTED;
3264         }
3265
3266         /* Currently, support 512/1024/2048/4096 bytes sector size */
3267         if (le32_to_cpu(raw_super->log_sectorsize) >
3268                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3269                 le32_to_cpu(raw_super->log_sectorsize) <
3270                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3271                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3272                           le32_to_cpu(raw_super->log_sectorsize));
3273                 return -EFSCORRUPTED;
3274         }
3275         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3276                 le32_to_cpu(raw_super->log_sectorsize) !=
3277                         F2FS_MAX_LOG_SECTOR_SIZE) {
3278                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3279                           le32_to_cpu(raw_super->log_sectors_per_block),
3280                           le32_to_cpu(raw_super->log_sectorsize));
3281                 return -EFSCORRUPTED;
3282         }
3283
3284         segment_count = le32_to_cpu(raw_super->segment_count);
3285         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3286         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3287         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3288         total_sections = le32_to_cpu(raw_super->section_count);
3289
3290         /* blocks_per_seg should be 512, given the above check */
3291         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3292
3293         if (segment_count > F2FS_MAX_SEGMENT ||
3294                                 segment_count < F2FS_MIN_SEGMENTS) {
3295                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3296                 return -EFSCORRUPTED;
3297         }
3298
3299         if (total_sections > segment_count_main || total_sections < 1 ||
3300                         segs_per_sec > segment_count || !segs_per_sec) {
3301                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3302                           segment_count, total_sections, segs_per_sec);
3303                 return -EFSCORRUPTED;
3304         }
3305
3306         if (segment_count_main != total_sections * segs_per_sec) {
3307                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3308                           segment_count_main, total_sections, segs_per_sec);
3309                 return -EFSCORRUPTED;
3310         }
3311
3312         if ((segment_count / segs_per_sec) < total_sections) {
3313                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3314                           segment_count, segs_per_sec, total_sections);
3315                 return -EFSCORRUPTED;
3316         }
3317
3318         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3319                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3320                           segment_count, le64_to_cpu(raw_super->block_count));
3321                 return -EFSCORRUPTED;
3322         }
3323
3324         if (RDEV(0).path[0]) {
3325                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3326                 int i = 1;
3327
3328                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3329                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3330                         i++;
3331                 }
3332                 if (segment_count != dev_seg_count) {
3333                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3334                                         segment_count, dev_seg_count);
3335                         return -EFSCORRUPTED;
3336                 }
3337         } else {
3338                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3339                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3340                         f2fs_info(sbi, "Zoned block device path is missing");
3341                         return -EFSCORRUPTED;
3342                 }
3343         }
3344
3345         if (secs_per_zone > total_sections || !secs_per_zone) {
3346                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3347                           secs_per_zone, total_sections);
3348                 return -EFSCORRUPTED;
3349         }
3350         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3351                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3352                         (le32_to_cpu(raw_super->extension_count) +
3353                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3354                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3355                           le32_to_cpu(raw_super->extension_count),
3356                           raw_super->hot_ext_count,
3357                           F2FS_MAX_EXTENSION);
3358                 return -EFSCORRUPTED;
3359         }
3360
3361         if (le32_to_cpu(raw_super->cp_payload) >=
3362                                 (blocks_per_seg - F2FS_CP_PACKS -
3363                                 NR_CURSEG_PERSIST_TYPE)) {
3364                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3365                           le32_to_cpu(raw_super->cp_payload),
3366                           blocks_per_seg - F2FS_CP_PACKS -
3367                           NR_CURSEG_PERSIST_TYPE);
3368                 return -EFSCORRUPTED;
3369         }
3370
3371         /* check reserved ino info */
3372         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3373                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3374                 le32_to_cpu(raw_super->root_ino) != 3) {
3375                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3376                           le32_to_cpu(raw_super->node_ino),
3377                           le32_to_cpu(raw_super->meta_ino),
3378                           le32_to_cpu(raw_super->root_ino));
3379                 return -EFSCORRUPTED;
3380         }
3381
3382         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3383         if (sanity_check_area_boundary(sbi, bh))
3384                 return -EFSCORRUPTED;
3385
3386         return 0;
3387 }
3388
3389 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3390 {
3391         unsigned int total, fsmeta;
3392         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3393         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3394         unsigned int ovp_segments, reserved_segments;
3395         unsigned int main_segs, blocks_per_seg;
3396         unsigned int sit_segs, nat_segs;
3397         unsigned int sit_bitmap_size, nat_bitmap_size;
3398         unsigned int log_blocks_per_seg;
3399         unsigned int segment_count_main;
3400         unsigned int cp_pack_start_sum, cp_payload;
3401         block_t user_block_count, valid_user_blocks;
3402         block_t avail_node_count, valid_node_count;
3403         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3404         int i, j;
3405
3406         total = le32_to_cpu(raw_super->segment_count);
3407         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3408         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3409         fsmeta += sit_segs;
3410         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3411         fsmeta += nat_segs;
3412         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3413         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3414
3415         if (unlikely(fsmeta >= total))
3416                 return 1;
3417
3418         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3419         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3420
3421         if (!f2fs_sb_has_readonly(sbi) &&
3422                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3423                         ovp_segments == 0 || reserved_segments == 0)) {
3424                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3425                 return 1;
3426         }
3427         user_block_count = le64_to_cpu(ckpt->user_block_count);
3428         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3429                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3430         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3431         if (!user_block_count || user_block_count >=
3432                         segment_count_main << log_blocks_per_seg) {
3433                 f2fs_err(sbi, "Wrong user_block_count: %u",
3434                          user_block_count);
3435                 return 1;
3436         }
3437
3438         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3439         if (valid_user_blocks > user_block_count) {
3440                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3441                          valid_user_blocks, user_block_count);
3442                 return 1;
3443         }
3444
3445         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3446         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3447         if (valid_node_count > avail_node_count) {
3448                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3449                          valid_node_count, avail_node_count);
3450                 return 1;
3451         }
3452
3453         main_segs = le32_to_cpu(raw_super->segment_count_main);
3454         blocks_per_seg = sbi->blocks_per_seg;
3455
3456         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3457                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3458                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3459                         return 1;
3460
3461                 if (f2fs_sb_has_readonly(sbi))
3462                         goto check_data;
3463
3464                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3465                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3466                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3467                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3468                                          i, j,
3469                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3470                                 return 1;
3471                         }
3472                 }
3473         }
3474 check_data:
3475         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3476                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3477                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3478                         return 1;
3479
3480                 if (f2fs_sb_has_readonly(sbi))
3481                         goto skip_cross;
3482
3483                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3484                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3485                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3486                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3487                                          i, j,
3488                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3489                                 return 1;
3490                         }
3491                 }
3492         }
3493         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3494                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3495                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3496                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3497                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3498                                          i, j,
3499                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3500                                 return 1;
3501                         }
3502                 }
3503         }
3504 skip_cross:
3505         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3506         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3507
3508         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3509                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3510                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3511                          sit_bitmap_size, nat_bitmap_size);
3512                 return 1;
3513         }
3514
3515         cp_pack_start_sum = __start_sum_addr(sbi);
3516         cp_payload = __cp_payload(sbi);
3517         if (cp_pack_start_sum < cp_payload + 1 ||
3518                 cp_pack_start_sum > blocks_per_seg - 1 -
3519                         NR_CURSEG_PERSIST_TYPE) {
3520                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3521                          cp_pack_start_sum);
3522                 return 1;
3523         }
3524
3525         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3526                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3527                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3528                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3529                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3530                           le32_to_cpu(ckpt->checksum_offset));
3531                 return 1;
3532         }
3533
3534         nat_blocks = nat_segs << log_blocks_per_seg;
3535         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3536         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3537         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3538                 (cp_payload + F2FS_CP_PACKS +
3539                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3540                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3541                           cp_payload, nat_bits_blocks);
3542                 return 1;
3543         }
3544
3545         if (unlikely(f2fs_cp_error(sbi))) {
3546                 f2fs_err(sbi, "A bug case: need to run fsck");
3547                 return 1;
3548         }
3549         return 0;
3550 }
3551
3552 static void init_sb_info(struct f2fs_sb_info *sbi)
3553 {
3554         struct f2fs_super_block *raw_super = sbi->raw_super;
3555         int i;
3556
3557         sbi->log_sectors_per_block =
3558                 le32_to_cpu(raw_super->log_sectors_per_block);
3559         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3560         sbi->blocksize = 1 << sbi->log_blocksize;
3561         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3562         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3563         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3564         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3565         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3566         sbi->total_node_count =
3567                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3568                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3569         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3570         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3571         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3572         sbi->cur_victim_sec = NULL_SECNO;
3573         sbi->gc_mode = GC_NORMAL;
3574         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3575         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3576         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3577         sbi->migration_granularity = sbi->segs_per_sec;
3578         sbi->seq_file_ra_mul = MIN_RA_MUL;
3579         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3580         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3581         spin_lock_init(&sbi->gc_urgent_high_lock);
3582
3583         sbi->dir_level = DEF_DIR_LEVEL;
3584         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3585         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3586         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3587         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3588         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3589         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3590                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3591         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3592
3593         for (i = 0; i < NR_COUNT_TYPE; i++)
3594                 atomic_set(&sbi->nr_pages[i], 0);
3595
3596         for (i = 0; i < META; i++)
3597                 atomic_set(&sbi->wb_sync_req[i], 0);
3598
3599         INIT_LIST_HEAD(&sbi->s_list);
3600         mutex_init(&sbi->umount_mutex);
3601         init_f2fs_rwsem(&sbi->io_order_lock);
3602         spin_lock_init(&sbi->cp_lock);
3603
3604         sbi->dirty_device = 0;
3605         spin_lock_init(&sbi->dev_lock);
3606
3607         init_f2fs_rwsem(&sbi->sb_lock);
3608         init_f2fs_rwsem(&sbi->pin_sem);
3609 }
3610
3611 static int init_percpu_info(struct f2fs_sb_info *sbi)
3612 {
3613         int err;
3614
3615         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3616         if (err)
3617                 return err;
3618
3619         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3620         if (err)
3621                 goto err_valid_block;
3622
3623         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3624                                                                 GFP_KERNEL);
3625         if (err)
3626                 goto err_node_block;
3627         return 0;
3628
3629 err_node_block:
3630         percpu_counter_destroy(&sbi->rf_node_block_count);
3631 err_valid_block:
3632         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3633         return err;
3634 }
3635
3636 #ifdef CONFIG_BLK_DEV_ZONED
3637
3638 struct f2fs_report_zones_args {
3639         struct f2fs_dev_info *dev;
3640         bool zone_cap_mismatch;
3641 };
3642
3643 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3644                               void *data)
3645 {
3646         struct f2fs_report_zones_args *rz_args = data;
3647
3648         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3649                 return 0;
3650
3651         set_bit(idx, rz_args->dev->blkz_seq);
3652         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3653                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3654         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3655                 rz_args->zone_cap_mismatch = true;
3656
3657         return 0;
3658 }
3659
3660 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3661 {
3662         struct block_device *bdev = FDEV(devi).bdev;
3663         sector_t nr_sectors = bdev_nr_sectors(bdev);
3664         struct f2fs_report_zones_args rep_zone_arg;
3665         u64 zone_sectors;
3666         int ret;
3667
3668         if (!f2fs_sb_has_blkzoned(sbi))
3669                 return 0;
3670
3671         zone_sectors = bdev_zone_sectors(bdev);
3672         if (!is_power_of_2(zone_sectors)) {
3673                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3674                 return -EINVAL;
3675         }
3676
3677         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3678                                 SECTOR_TO_BLOCK(zone_sectors))
3679                 return -EINVAL;
3680         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3681         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3682                                 __ilog2_u32(sbi->blocks_per_blkz))
3683                 return -EINVAL;
3684         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3685         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3686                                         sbi->log_blocks_per_blkz;
3687         if (nr_sectors & (zone_sectors - 1))
3688                 FDEV(devi).nr_blkz++;
3689
3690         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3691                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3692                                         * sizeof(unsigned long),
3693                                         GFP_KERNEL);
3694         if (!FDEV(devi).blkz_seq)
3695                 return -ENOMEM;
3696
3697         /* Get block zones type and zone-capacity */
3698         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3699                                         FDEV(devi).nr_blkz * sizeof(block_t),
3700                                         GFP_KERNEL);
3701         if (!FDEV(devi).zone_capacity_blocks)
3702                 return -ENOMEM;
3703
3704         rep_zone_arg.dev = &FDEV(devi);
3705         rep_zone_arg.zone_cap_mismatch = false;
3706
3707         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3708                                   &rep_zone_arg);
3709         if (ret < 0)
3710                 return ret;
3711
3712         if (!rep_zone_arg.zone_cap_mismatch) {
3713                 kfree(FDEV(devi).zone_capacity_blocks);
3714                 FDEV(devi).zone_capacity_blocks = NULL;
3715         }
3716
3717         return 0;
3718 }
3719 #endif
3720
3721 /*
3722  * Read f2fs raw super block.
3723  * Because we have two copies of super block, so read both of them
3724  * to get the first valid one. If any one of them is broken, we pass
3725  * them recovery flag back to the caller.
3726  */
3727 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3728                         struct f2fs_super_block **raw_super,
3729                         int *valid_super_block, int *recovery)
3730 {
3731         struct super_block *sb = sbi->sb;
3732         int block;
3733         struct buffer_head *bh;
3734         struct f2fs_super_block *super;
3735         int err = 0;
3736
3737         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3738         if (!super)
3739                 return -ENOMEM;
3740
3741         for (block = 0; block < 2; block++) {
3742                 bh = sb_bread(sb, block);
3743                 if (!bh) {
3744                         f2fs_err(sbi, "Unable to read %dth superblock",
3745                                  block + 1);
3746                         err = -EIO;
3747                         *recovery = 1;
3748                         continue;
3749                 }
3750
3751                 /* sanity checking of raw super */
3752                 err = sanity_check_raw_super(sbi, bh);
3753                 if (err) {
3754                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3755                                  block + 1);
3756                         brelse(bh);
3757                         *recovery = 1;
3758                         continue;
3759                 }
3760
3761                 if (!*raw_super) {
3762                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3763                                                         sizeof(*super));
3764                         *valid_super_block = block;
3765                         *raw_super = super;
3766                 }
3767                 brelse(bh);
3768         }
3769
3770         /* No valid superblock */
3771         if (!*raw_super)
3772                 kfree(super);
3773         else
3774                 err = 0;
3775
3776         return err;
3777 }
3778
3779 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3780 {
3781         struct buffer_head *bh;
3782         __u32 crc = 0;
3783         int err;
3784
3785         if ((recover && f2fs_readonly(sbi->sb)) ||
3786                                 bdev_read_only(sbi->sb->s_bdev)) {
3787                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3788                 return -EROFS;
3789         }
3790
3791         /* we should update superblock crc here */
3792         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3793                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3794                                 offsetof(struct f2fs_super_block, crc));
3795                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3796         }
3797
3798         /* write back-up superblock first */
3799         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3800         if (!bh)
3801                 return -EIO;
3802         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3803         brelse(bh);
3804
3805         /* if we are in recovery path, skip writing valid superblock */
3806         if (recover || err)
3807                 return err;
3808
3809         /* write current valid superblock */
3810         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3811         if (!bh)
3812                 return -EIO;
3813         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3814         brelse(bh);
3815         return err;
3816 }
3817
3818 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3819 {
3820         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3821         unsigned int max_devices = MAX_DEVICES;
3822         unsigned int logical_blksize;
3823         int i;
3824
3825         /* Initialize single device information */
3826         if (!RDEV(0).path[0]) {
3827                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3828                         return 0;
3829                 max_devices = 1;
3830         }
3831
3832         /*
3833          * Initialize multiple devices information, or single
3834          * zoned block device information.
3835          */
3836         sbi->devs = f2fs_kzalloc(sbi,
3837                                  array_size(max_devices,
3838                                             sizeof(struct f2fs_dev_info)),
3839                                  GFP_KERNEL);
3840         if (!sbi->devs)
3841                 return -ENOMEM;
3842
3843         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3844         sbi->aligned_blksize = true;
3845
3846         for (i = 0; i < max_devices; i++) {
3847
3848                 if (i > 0 && !RDEV(i).path[0])
3849                         break;
3850
3851                 if (max_devices == 1) {
3852                         /* Single zoned block device mount */
3853                         FDEV(0).bdev =
3854                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3855                                         sbi->sb->s_mode, sbi->sb->s_type);
3856                 } else {
3857                         /* Multi-device mount */
3858                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3859                         FDEV(i).total_segments =
3860                                 le32_to_cpu(RDEV(i).total_segments);
3861                         if (i == 0) {
3862                                 FDEV(i).start_blk = 0;
3863                                 FDEV(i).end_blk = FDEV(i).start_blk +
3864                                     (FDEV(i).total_segments <<
3865                                     sbi->log_blocks_per_seg) - 1 +
3866                                     le32_to_cpu(raw_super->segment0_blkaddr);
3867                         } else {
3868                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3869                                 FDEV(i).end_blk = FDEV(i).start_blk +
3870                                         (FDEV(i).total_segments <<
3871                                         sbi->log_blocks_per_seg) - 1;
3872                         }
3873                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3874                                         sbi->sb->s_mode, sbi->sb->s_type);
3875                 }
3876                 if (IS_ERR(FDEV(i).bdev))
3877                         return PTR_ERR(FDEV(i).bdev);
3878
3879                 /* to release errored devices */
3880                 sbi->s_ndevs = i + 1;
3881
3882                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
3883                         sbi->aligned_blksize = false;
3884
3885 #ifdef CONFIG_BLK_DEV_ZONED
3886                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3887                                 !f2fs_sb_has_blkzoned(sbi)) {
3888                         f2fs_err(sbi, "Zoned block device feature not enabled");
3889                         return -EINVAL;
3890                 }
3891                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3892                         if (init_blkz_info(sbi, i)) {
3893                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3894                                 return -EINVAL;
3895                         }
3896                         if (max_devices == 1)
3897                                 break;
3898                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3899                                   i, FDEV(i).path,
3900                                   FDEV(i).total_segments,
3901                                   FDEV(i).start_blk, FDEV(i).end_blk,
3902                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3903                                   "Host-aware" : "Host-managed");
3904                         continue;
3905                 }
3906 #endif
3907                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3908                           i, FDEV(i).path,
3909                           FDEV(i).total_segments,
3910                           FDEV(i).start_blk, FDEV(i).end_blk);
3911         }
3912         f2fs_info(sbi,
3913                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3914         return 0;
3915 }
3916
3917 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3918 {
3919 #if IS_ENABLED(CONFIG_UNICODE)
3920         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3921                 const struct f2fs_sb_encodings *encoding_info;
3922                 struct unicode_map *encoding;
3923                 __u16 encoding_flags;
3924
3925                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
3926                 if (!encoding_info) {
3927                         f2fs_err(sbi,
3928                                  "Encoding requested by superblock is unknown");
3929                         return -EINVAL;
3930                 }
3931
3932                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
3933                 encoding = utf8_load(encoding_info->version);
3934                 if (IS_ERR(encoding)) {
3935                         f2fs_err(sbi,
3936                                  "can't mount with superblock charset: %s-%u.%u.%u "
3937                                  "not supported by the kernel. flags: 0x%x.",
3938                                  encoding_info->name,
3939                                  unicode_major(encoding_info->version),
3940                                  unicode_minor(encoding_info->version),
3941                                  unicode_rev(encoding_info->version),
3942                                  encoding_flags);
3943                         return PTR_ERR(encoding);
3944                 }
3945                 f2fs_info(sbi, "Using encoding defined by superblock: "
3946                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
3947                          unicode_major(encoding_info->version),
3948                          unicode_minor(encoding_info->version),
3949                          unicode_rev(encoding_info->version),
3950                          encoding_flags);
3951
3952                 sbi->sb->s_encoding = encoding;
3953                 sbi->sb->s_encoding_flags = encoding_flags;
3954         }
3955 #else
3956         if (f2fs_sb_has_casefold(sbi)) {
3957                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3958                 return -EINVAL;
3959         }
3960 #endif
3961         return 0;
3962 }
3963
3964 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3965 {
3966         struct f2fs_sm_info *sm_i = SM_I(sbi);
3967
3968         /* adjust parameters according to the volume size */
3969         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3970                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3971                 if (f2fs_block_unit_discard(sbi))
3972                         sm_i->dcc_info->discard_granularity = 1;
3973                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE |
3974                                         1 << F2FS_IPU_HONOR_OPU_WRITE;
3975         }
3976
3977         sbi->readdir_ra = 1;
3978 }
3979
3980 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3981 {
3982         struct f2fs_sb_info *sbi;
3983         struct f2fs_super_block *raw_super;
3984         struct inode *root;
3985         int err;
3986         bool skip_recovery = false, need_fsck = false;
3987         char *options = NULL;
3988         int recovery, i, valid_super_block;
3989         struct curseg_info *seg_i;
3990         int retry_cnt = 1;
3991
3992 try_onemore:
3993         err = -EINVAL;
3994         raw_super = NULL;
3995         valid_super_block = -1;
3996         recovery = 0;
3997
3998         /* allocate memory for f2fs-specific super block info */
3999         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4000         if (!sbi)
4001                 return -ENOMEM;
4002
4003         sbi->sb = sb;
4004
4005         /* Load the checksum driver */
4006         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4007         if (IS_ERR(sbi->s_chksum_driver)) {
4008                 f2fs_err(sbi, "Cannot load crc32 driver.");
4009                 err = PTR_ERR(sbi->s_chksum_driver);
4010                 sbi->s_chksum_driver = NULL;
4011                 goto free_sbi;
4012         }
4013
4014         /* set a block size */
4015         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4016                 f2fs_err(sbi, "unable to set blocksize");
4017                 goto free_sbi;
4018         }
4019
4020         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4021                                                                 &recovery);
4022         if (err)
4023                 goto free_sbi;
4024
4025         sb->s_fs_info = sbi;
4026         sbi->raw_super = raw_super;
4027
4028         /* precompute checksum seed for metadata */
4029         if (f2fs_sb_has_inode_chksum(sbi))
4030                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4031                                                 sizeof(raw_super->uuid));
4032
4033         default_options(sbi);
4034         /* parse mount options */
4035         options = kstrdup((const char *)data, GFP_KERNEL);
4036         if (data && !options) {
4037                 err = -ENOMEM;
4038                 goto free_sb_buf;
4039         }
4040
4041         err = parse_options(sb, options, false);
4042         if (err)
4043                 goto free_options;
4044
4045         sb->s_maxbytes = max_file_blocks(NULL) <<
4046                                 le32_to_cpu(raw_super->log_blocksize);
4047         sb->s_max_links = F2FS_LINK_MAX;
4048
4049         err = f2fs_setup_casefold(sbi);
4050         if (err)
4051                 goto free_options;
4052
4053 #ifdef CONFIG_QUOTA
4054         sb->dq_op = &f2fs_quota_operations;
4055         sb->s_qcop = &f2fs_quotactl_ops;
4056         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4057
4058         if (f2fs_sb_has_quota_ino(sbi)) {
4059                 for (i = 0; i < MAXQUOTAS; i++) {
4060                         if (f2fs_qf_ino(sbi->sb, i))
4061                                 sbi->nquota_files++;
4062                 }
4063         }
4064 #endif
4065
4066         sb->s_op = &f2fs_sops;
4067 #ifdef CONFIG_FS_ENCRYPTION
4068         sb->s_cop = &f2fs_cryptops;
4069 #endif
4070 #ifdef CONFIG_FS_VERITY
4071         sb->s_vop = &f2fs_verityops;
4072 #endif
4073         sb->s_xattr = f2fs_xattr_handlers;
4074         sb->s_export_op = &f2fs_export_ops;
4075         sb->s_magic = F2FS_SUPER_MAGIC;
4076         sb->s_time_gran = 1;
4077         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4078                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4079         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4080         sb->s_iflags |= SB_I_CGROUPWB;
4081
4082         /* init f2fs-specific super block info */
4083         sbi->valid_super_block = valid_super_block;
4084         init_f2fs_rwsem(&sbi->gc_lock);
4085         mutex_init(&sbi->writepages);
4086         init_f2fs_rwsem(&sbi->cp_global_sem);
4087         init_f2fs_rwsem(&sbi->node_write);
4088         init_f2fs_rwsem(&sbi->node_change);
4089
4090         /* disallow all the data/node/meta page writes */
4091         set_sbi_flag(sbi, SBI_POR_DOING);
4092         spin_lock_init(&sbi->stat_lock);
4093
4094         err = f2fs_init_write_merge_io(sbi);
4095         if (err)
4096                 goto free_bio_info;
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, "f2fs-shrinker");
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