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/statfs.h>
  12 #include <linux/buffer_head.h>
  13 #include <linux/backing-dev.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
  37 #define CREATE_TRACE_POINTS
  38 #include <trace/events/f2fs.h>
  39
  40 static struct kmem_cache *f2fs_inode_cachep;
  41
  42 #ifdef CONFIG_F2FS_FAULT_INJECTION
  43
  44 const char *f2fs_fault_name[FAULT_MAX] = {
  45         [FAULT_KMALLOC]         = "kmalloc",
  46         [FAULT_KVMALLOC]        = "kvmalloc",
  47         [FAULT_PAGE_ALLOC]      = "page alloc",
  48         [FAULT_PAGE_GET]        = "page get",
  49         [FAULT_ALLOC_NID]       = "alloc nid",
  50         [FAULT_ORPHAN]          = "orphan",
  51         [FAULT_BLOCK]           = "no more block",
  52         [FAULT_DIR_DEPTH]       = "too big dir depth",
  53         [FAULT_EVICT_INODE]     = "evict_inode fail",
  54         [FAULT_TRUNCATE]        = "truncate fail",
  55         [FAULT_READ_IO]         = "read IO error",
  56         [FAULT_CHECKPOINT]      = "checkpoint error",
  57         [FAULT_DISCARD]         = "discard error",
  58         [FAULT_WRITE_IO]        = "write IO error",
  59 };
  60
  61 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  62                                                         unsigned int type)
  63 {
  64         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  65
  66         if (rate) {
  67                 atomic_set(&ffi->inject_ops, 0);
  68                 ffi->inject_rate = rate;
  69         }
  70
  71         if (type)
  72                 ffi->inject_type = type;
  73
  74         if (!rate && !type)
  75                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  76 }
  77 #endif
  78
  79 /* f2fs-wide shrinker description */
  80 static struct shrinker f2fs_shrinker_info = {
  81         .scan_objects = f2fs_shrink_scan,
  82         .count_objects = f2fs_shrink_count,
  83         .seeks = DEFAULT_SEEKS,
  84 };
  85
  86 enum {
  87         Opt_gc_background,
  88         Opt_disable_roll_forward,
  89         Opt_norecovery,
  90         Opt_discard,
  91         Opt_nodiscard,
  92         Opt_noheap,
  93         Opt_heap,
  94         Opt_user_xattr,
  95         Opt_nouser_xattr,
  96         Opt_acl,
  97         Opt_noacl,
  98         Opt_active_logs,
  99         Opt_disable_ext_identify,
 100         Opt_inline_xattr,
 101         Opt_noinline_xattr,
 102         Opt_inline_xattr_size,
 103         Opt_inline_data,
 104         Opt_inline_dentry,
 105         Opt_noinline_dentry,
 106         Opt_flush_merge,
 107         Opt_noflush_merge,
 108         Opt_nobarrier,
 109         Opt_fastboot,
 110         Opt_extent_cache,
 111         Opt_noextent_cache,
 112         Opt_noinline_data,
 113         Opt_data_flush,
 114         Opt_reserve_root,
 115         Opt_resgid,
 116         Opt_resuid,
 117         Opt_mode,
 118         Opt_io_size_bits,
 119         Opt_fault_injection,
 120         Opt_fault_type,
 121         Opt_lazytime,
 122         Opt_nolazytime,
 123         Opt_quota,
 124         Opt_noquota,
 125         Opt_usrquota,
 126         Opt_grpquota,
 127         Opt_prjquota,
 128         Opt_usrjquota,
 129         Opt_grpjquota,
 130         Opt_prjjquota,
 131         Opt_offusrjquota,
 132         Opt_offgrpjquota,
 133         Opt_offprjjquota,
 134         Opt_jqfmt_vfsold,
 135         Opt_jqfmt_vfsv0,
 136         Opt_jqfmt_vfsv1,
 137         Opt_whint,
 138         Opt_alloc,
 139         Opt_fsync,
 140         Opt_test_dummy_encryption,
 141         Opt_inlinecrypt,
 142         Opt_checkpoint_disable,
 143         Opt_checkpoint_disable_cap,
 144         Opt_checkpoint_disable_cap_perc,
 145         Opt_checkpoint_enable,
 146         Opt_checkpoint_merge,
 147         Opt_nocheckpoint_merge,
 148         Opt_compress_algorithm,
 149         Opt_compress_log_size,
 150         Opt_compress_extension,
 151         Opt_compress_chksum,
 152         Opt_compress_mode,
 153         Opt_atgc,
 154         Opt_gc_merge,
 155         Opt_nogc_merge,
 156         Opt_err,
 157 };
 158
 159 static match_table_t f2fs_tokens = {
 160         {Opt_gc_background, "background_gc=%s"},
 161         {Opt_disable_roll_forward, "disable_roll_forward"},
 162         {Opt_norecovery, "norecovery"},
 163         {Opt_discard, "discard"},
 164         {Opt_nodiscard, "nodiscard"},
 165         {Opt_noheap, "no_heap"},
 166         {Opt_heap, "heap"},
 167         {Opt_user_xattr, "user_xattr"},
 168         {Opt_nouser_xattr, "nouser_xattr"},
 169         {Opt_acl, "acl"},
 170         {Opt_noacl, "noacl"},
 171         {Opt_active_logs, "active_logs=%u"},
 172         {Opt_disable_ext_identify, "disable_ext_identify"},
 173         {Opt_inline_xattr, "inline_xattr"},
 174         {Opt_noinline_xattr, "noinline_xattr"},
 175         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 176         {Opt_inline_data, "inline_data"},
 177         {Opt_inline_dentry, "inline_dentry"},
 178         {Opt_noinline_dentry, "noinline_dentry"},
 179         {Opt_flush_merge, "flush_merge"},
 180         {Opt_noflush_merge, "noflush_merge"},
 181         {Opt_nobarrier, "nobarrier"},
 182         {Opt_fastboot, "fastboot"},
 183         {Opt_extent_cache, "extent_cache"},
 184         {Opt_noextent_cache, "noextent_cache"},
 185         {Opt_noinline_data, "noinline_data"},
 186         {Opt_data_flush, "data_flush"},
 187         {Opt_reserve_root, "reserve_root=%u"},
 188         {Opt_resgid, "resgid=%u"},
 189         {Opt_resuid, "resuid=%u"},
 190         {Opt_mode, "mode=%s"},
 191         {Opt_io_size_bits, "io_bits=%u"},
 192         {Opt_fault_injection, "fault_injection=%u"},
 193         {Opt_fault_type, "fault_type=%u"},
 194         {Opt_lazytime, "lazytime"},
 195         {Opt_nolazytime, "nolazytime"},
 196         {Opt_quota, "quota"},
 197         {Opt_noquota, "noquota"},
 198         {Opt_usrquota, "usrquota"},
 199         {Opt_grpquota, "grpquota"},
 200         {Opt_prjquota, "prjquota"},
 201         {Opt_usrjquota, "usrjquota=%s"},
 202         {Opt_grpjquota, "grpjquota=%s"},
 203         {Opt_prjjquota, "prjjquota=%s"},
 204         {Opt_offusrjquota, "usrjquota="},
 205         {Opt_offgrpjquota, "grpjquota="},
 206         {Opt_offprjjquota, "prjjquota="},
 207         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 208         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 209         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 210         {Opt_whint, "whint_mode=%s"},
 211         {Opt_alloc, "alloc_mode=%s"},
 212         {Opt_fsync, "fsync_mode=%s"},
 213         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 214         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 215         {Opt_inlinecrypt, "inlinecrypt"},
 216         {Opt_checkpoint_disable, "checkpoint=disable"},
 217         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 218         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 219         {Opt_checkpoint_enable, "checkpoint=enable"},
 220         {Opt_checkpoint_merge, "checkpoint_merge"},
 221         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 222         {Opt_compress_algorithm, "compress_algorithm=%s"},
 223         {Opt_compress_log_size, "compress_log_size=%u"},
 224         {Opt_compress_extension, "compress_extension=%s"},
 225         {Opt_compress_chksum, "compress_chksum"},
 226         {Opt_compress_mode, "compress_mode=%s"},
 227         {Opt_atgc, "atgc"},
 228         {Opt_gc_merge, "gc_merge"},
 229         {Opt_nogc_merge, "nogc_merge"},
 230         {Opt_err, NULL},
 231 };
 232
 233 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 234 {
 235         struct va_format vaf;
 236         va_list args;
 237         int level;
 238
 239         va_start(args, fmt);
 240
 241         level = printk_get_level(fmt);
 242         vaf.fmt = printk_skip_level(fmt);
 243         vaf.va = &args;
 244         printk("%c%cF2FS-fs (%s): %pV\n",
 245                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 246
 247         va_end(args);
 248 }
 249
 250 #ifdef CONFIG_UNICODE
 251 static const struct f2fs_sb_encodings {
 252         __u16 magic;
 253         char *name;
 254         char *version;
 255 } f2fs_sb_encoding_map[] = {
 256         {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
 257 };
 258
 259 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
 260                                  const struct f2fs_sb_encodings **encoding,
 261                                  __u16 *flags)
 262 {
 263         __u16 magic = le16_to_cpu(sb->s_encoding);
 264         int i;
 265
 266         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 267                 if (magic == f2fs_sb_encoding_map[i].magic)
 268                         break;
 269
 270         if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
 271                 return -EINVAL;
 272
 273         *encoding = &f2fs_sb_encoding_map[i];
 274         *flags = le16_to_cpu(sb->s_encoding_flags);
 275
 276         return 0;
 277 }
 278 #endif
 279
 280 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 281 {
 282         block_t limit = min((sbi->user_block_count << 1) / 1000,
 283                         sbi->user_block_count - sbi->reserved_blocks);
 284
 285         /* limit is 0.2% */
 286         if (test_opt(sbi, RESERVE_ROOT) &&
 287                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 288                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 289                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 290                           F2FS_OPTION(sbi).root_reserved_blocks);
 291         }
 292         if (!test_opt(sbi, RESERVE_ROOT) &&
 293                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 294                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 295                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 296                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 297                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 298                           from_kuid_munged(&init_user_ns,
 299                                            F2FS_OPTION(sbi).s_resuid),
 300                           from_kgid_munged(&init_user_ns,
 301                                            F2FS_OPTION(sbi).s_resgid));
 302 }
 303
 304 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 305 {
 306         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 307                 return;
 308
 309         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 310                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 311         else
 312                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 313                                         F2FS_OPTION(sbi).unusable_cap_perc;
 314
 315         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 316                         F2FS_OPTION(sbi).unusable_cap,
 317                         F2FS_OPTION(sbi).unusable_cap_perc);
 318 }
 319
 320 static void init_once(void *foo)
 321 {
 322         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 323
 324         inode_init_once(&fi->vfs_inode);
 325 }
 326
 327 #ifdef CONFIG_QUOTA
 328 static const char * const quotatypes[] = INITQFNAMES;
 329 #define QTYPE2NAME(t) (quotatypes[t])
 330 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 331                                                         substring_t *args)
 332 {
 333         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 334         char *qname;
 335         int ret = -EINVAL;
 336
 337         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 338                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 339                 return -EINVAL;
 340         }
 341         if (f2fs_sb_has_quota_ino(sbi)) {
 342                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 343                 return 0;
 344         }
 345
 346         qname = match_strdup(args);
 347         if (!qname) {
 348                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 349                 return -ENOMEM;
 350         }
 351         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 352                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 353                         ret = 0;
 354                 else
 355                         f2fs_err(sbi, "%s quota file already specified",
 356                                  QTYPE2NAME(qtype));
 357                 goto errout;
 358         }
 359         if (strchr(qname, '/')) {
 360                 f2fs_err(sbi, "quotafile must be on filesystem root");
 361                 goto errout;
 362         }
 363         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 364         set_opt(sbi, QUOTA);
 365         return 0;
 366 errout:
 367         kfree(qname);
 368         return ret;
 369 }
 370
 371 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 372 {
 373         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 374
 375         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 376                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 377                 return -EINVAL;
 378         }
 379         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 380         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 381         return 0;
 382 }
 383
 384 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 385 {
 386         /*
 387          * We do the test below only for project quotas. 'usrquota' and
 388          * 'grpquota' mount options are allowed even without quota feature
 389          * to support legacy quotas in quota files.
 390          */
 391         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 392                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 393                 return -1;
 394         }
 395         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 396                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 397                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 398                 if (test_opt(sbi, USRQUOTA) &&
 399                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 400                         clear_opt(sbi, USRQUOTA);
 401
 402                 if (test_opt(sbi, GRPQUOTA) &&
 403                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 404                         clear_opt(sbi, GRPQUOTA);
 405
 406                 if (test_opt(sbi, PRJQUOTA) &&
 407                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 408                         clear_opt(sbi, PRJQUOTA);
 409
 410                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 411                                 test_opt(sbi, PRJQUOTA)) {
 412                         f2fs_err(sbi, "old and new quota format mixing");
 413                         return -1;
 414                 }
 415
 416                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 417                         f2fs_err(sbi, "journaled quota format not specified");
 418                         return -1;
 419                 }
 420         }
 421
 422         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 423                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 424                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 425         }
 426         return 0;
 427 }
 428 #endif
 429
 430 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 431                                           const char *opt,
 432                                           const substring_t *arg,
 433                                           bool is_remount)
 434 {
 435         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 436 #ifdef CONFIG_FS_ENCRYPTION
 437         int err;
 438
 439         if (!f2fs_sb_has_encrypt(sbi)) {
 440                 f2fs_err(sbi, "Encrypt feature is off");
 441                 return -EINVAL;
 442         }
 443
 444         /*
 445          * This mount option is just for testing, and it's not worthwhile to
 446          * implement the extra complexity (e.g. RCU protection) that would be
 447          * needed to allow it to be set or changed during remount.  We do allow
 448          * it to be specified during remount, but only if there is no change.
 449          */
 450         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
 451                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 452                 return -EINVAL;
 453         }
 454         err = fscrypt_set_test_dummy_encryption(
 455                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
 456         if (err) {
 457                 if (err == -EEXIST)
 458                         f2fs_warn(sbi,
 459                                   "Can't change test_dummy_encryption on remount");
 460                 else if (err == -EINVAL)
 461                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 462                                   opt);
 463                 else
 464                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 465                                   opt, err);
 466                 return -EINVAL;
 467         }
 468         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 469 #else
 470         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
 471 #endif
 472         return 0;
 473 }
 474
 475 #ifdef CONFIG_F2FS_FS_COMPRESSION
 476 #ifdef CONFIG_F2FS_FS_LZ4
 477 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 478 {
 479 #ifdef CONFIG_F2FS_FS_LZ4HC
 480         unsigned int level;
 481 #endif
 482
 483         if (strlen(str) == 3) {
 484                 F2FS_OPTION(sbi).compress_level = 0;
 485                 return 0;
 486         }
 487
 488 #ifdef CONFIG_F2FS_FS_LZ4HC
 489         str += 3;
 490
 491         if (str[0] != ':') {
 492                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 493                 return -EINVAL;
 494         }
 495         if (kstrtouint(str + 1, 10, &level))
 496                 return -EINVAL;
 497
 498         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 499                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 500                 return -EINVAL;
 501         }
 502
 503         F2FS_OPTION(sbi).compress_level = level;
 504         return 0;
 505 #else
 506         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 507         return -EINVAL;
 508 #endif
 509 }
 510 #endif
 511
 512 #ifdef CONFIG_F2FS_FS_ZSTD
 513 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 514 {
 515         unsigned int level;
 516         int len = 4;
 517
 518         if (strlen(str) == len) {
 519                 F2FS_OPTION(sbi).compress_level = 0;
 520                 return 0;
 521         }
 522
 523         str += len;
 524
 525         if (str[0] != ':') {
 526                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 527                 return -EINVAL;
 528         }
 529         if (kstrtouint(str + 1, 10, &level))
 530                 return -EINVAL;
 531
 532         if (!level || level > ZSTD_maxCLevel()) {
 533                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 534                 return -EINVAL;
 535         }
 536
 537         F2FS_OPTION(sbi).compress_level = level;
 538         return 0;
 539 }
 540 #endif
 541 #endif
 542
 543 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 544 {
 545         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 546         substring_t args[MAX_OPT_ARGS];
 547 #ifdef CONFIG_F2FS_FS_COMPRESSION
 548         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 549         int ext_cnt;
 550 #endif
 551         char *p, *name;
 552         int arg = 0;
 553         kuid_t uid;
 554         kgid_t gid;
 555         int ret;
 556
 557         if (!options)
 558                 return 0;
 559
 560         while ((p = strsep(&options, ",")) != NULL) {
 561                 int token;
 562
 563                 if (!*p)
 564                         continue;
 565                 /*
 566                  * Initialize args struct so we know whether arg was
 567                  * found; some options take optional arguments.
 568                  */
 569                 args[0].to = args[0].from = NULL;
 570                 token = match_token(p, f2fs_tokens, args);
 571
 572                 switch (token) {
 573                 case Opt_gc_background:
 574                         name = match_strdup(&args[0]);
 575
 576                         if (!name)
 577                                 return -ENOMEM;
 578                         if (!strcmp(name, "on")) {
 579                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 580                         } else if (!strcmp(name, "off")) {
 581                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 582                         } else if (!strcmp(name, "sync")) {
 583                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 584                         } else {
 585                                 kfree(name);
 586                                 return -EINVAL;
 587                         }
 588                         kfree(name);
 589                         break;
 590                 case Opt_disable_roll_forward:
 591                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 592                         break;
 593                 case Opt_norecovery:
 594                         /* this option mounts f2fs with ro */
 595                         set_opt(sbi, NORECOVERY);
 596                         if (!f2fs_readonly(sb))
 597                                 return -EINVAL;
 598                         break;
 599                 case Opt_discard:
 600                         set_opt(sbi, DISCARD);
 601                         break;
 602                 case Opt_nodiscard:
 603                         if (f2fs_sb_has_blkzoned(sbi)) {
 604                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 605                                 return -EINVAL;
 606                         }
 607                         clear_opt(sbi, DISCARD);
 608                         break;
 609                 case Opt_noheap:
 610                         set_opt(sbi, NOHEAP);
 611                         break;
 612                 case Opt_heap:
 613                         clear_opt(sbi, NOHEAP);
 614                         break;
 615 #ifdef CONFIG_F2FS_FS_XATTR
 616                 case Opt_user_xattr:
 617                         set_opt(sbi, XATTR_USER);
 618                         break;
 619                 case Opt_nouser_xattr:
 620                         clear_opt(sbi, XATTR_USER);
 621                         break;
 622                 case Opt_inline_xattr:
 623                         set_opt(sbi, INLINE_XATTR);
 624                         break;
 625                 case Opt_noinline_xattr:
 626                         clear_opt(sbi, INLINE_XATTR);
 627                         break;
 628                 case Opt_inline_xattr_size:
 629                         if (args->from && match_int(args, &arg))
 630                                 return -EINVAL;
 631                         set_opt(sbi, INLINE_XATTR_SIZE);
 632                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 633                         break;
 634 #else
 635                 case Opt_user_xattr:
 636                         f2fs_info(sbi, "user_xattr options not supported");
 637                         break;
 638                 case Opt_nouser_xattr:
 639                         f2fs_info(sbi, "nouser_xattr options not supported");
 640                         break;
 641                 case Opt_inline_xattr:
 642                         f2fs_info(sbi, "inline_xattr options not supported");
 643                         break;
 644                 case Opt_noinline_xattr:
 645                         f2fs_info(sbi, "noinline_xattr options not supported");
 646                         break;
 647 #endif
 648 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 649                 case Opt_acl:
 650                         set_opt(sbi, POSIX_ACL);
 651                         break;
 652                 case Opt_noacl:
 653                         clear_opt(sbi, POSIX_ACL);
 654                         break;
 655 #else
 656                 case Opt_acl:
 657                         f2fs_info(sbi, "acl options not supported");
 658                         break;
 659                 case Opt_noacl:
 660                         f2fs_info(sbi, "noacl options not supported");
 661                         break;
 662 #endif
 663                 case Opt_active_logs:
 664                         if (args->from && match_int(args, &arg))
 665                                 return -EINVAL;
 666                         if (arg != 2 && arg != 4 &&
 667                                 arg != NR_CURSEG_PERSIST_TYPE)
 668                                 return -EINVAL;
 669                         F2FS_OPTION(sbi).active_logs = arg;
 670                         break;
 671                 case Opt_disable_ext_identify:
 672                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 673                         break;
 674                 case Opt_inline_data:
 675                         set_opt(sbi, INLINE_DATA);
 676                         break;
 677                 case Opt_inline_dentry:
 678                         set_opt(sbi, INLINE_DENTRY);
 679                         break;
 680                 case Opt_noinline_dentry:
 681                         clear_opt(sbi, INLINE_DENTRY);
 682                         break;
 683                 case Opt_flush_merge:
 684                         set_opt(sbi, FLUSH_MERGE);
 685                         break;
 686                 case Opt_noflush_merge:
 687                         clear_opt(sbi, FLUSH_MERGE);
 688                         break;
 689                 case Opt_nobarrier:
 690                         set_opt(sbi, NOBARRIER);
 691                         break;
 692                 case Opt_fastboot:
 693                         set_opt(sbi, FASTBOOT);
 694                         break;
 695                 case Opt_extent_cache:
 696                         set_opt(sbi, EXTENT_CACHE);
 697                         break;
 698                 case Opt_noextent_cache:
 699                         clear_opt(sbi, EXTENT_CACHE);
 700                         break;
 701                 case Opt_noinline_data:
 702                         clear_opt(sbi, INLINE_DATA);
 703                         break;
 704                 case Opt_data_flush:
 705                         set_opt(sbi, DATA_FLUSH);
 706                         break;
 707                 case Opt_reserve_root:
 708                         if (args->from && match_int(args, &arg))
 709                                 return -EINVAL;
 710                         if (test_opt(sbi, RESERVE_ROOT)) {
 711                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 712                                           F2FS_OPTION(sbi).root_reserved_blocks);
 713                         } else {
 714                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 715                                 set_opt(sbi, RESERVE_ROOT);
 716                         }
 717                         break;
 718                 case Opt_resuid:
 719                         if (args->from && match_int(args, &arg))
 720                                 return -EINVAL;
 721                         uid = make_kuid(current_user_ns(), arg);
 722                         if (!uid_valid(uid)) {
 723                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 724                                 return -EINVAL;
 725                         }
 726                         F2FS_OPTION(sbi).s_resuid = uid;
 727                         break;
 728                 case Opt_resgid:
 729                         if (args->from && match_int(args, &arg))
 730                                 return -EINVAL;
 731                         gid = make_kgid(current_user_ns(), arg);
 732                         if (!gid_valid(gid)) {
 733                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 734                                 return -EINVAL;
 735                         }
 736                         F2FS_OPTION(sbi).s_resgid = gid;
 737                         break;
 738                 case Opt_mode:
 739                         name = match_strdup(&args[0]);
 740
 741                         if (!name)
 742                                 return -ENOMEM;
 743                         if (!strcmp(name, "adaptive")) {
 744                                 if (f2fs_sb_has_blkzoned(sbi)) {
 745                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 746                                         kfree(name);
 747                                         return -EINVAL;
 748                                 }
 749                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 750                         } else if (!strcmp(name, "lfs")) {
 751                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 752                         } else {
 753                                 kfree(name);
 754                                 return -EINVAL;
 755                         }
 756                         kfree(name);
 757                         break;
 758                 case Opt_io_size_bits:
 759                         if (args->from && match_int(args, &arg))
 760                                 return -EINVAL;
 761                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 762                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 763                                           1 << arg, BIO_MAX_VECS);
 764                                 return -EINVAL;
 765                         }
 766                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 767                         break;
 768 #ifdef CONFIG_F2FS_FAULT_INJECTION
 769                 case Opt_fault_injection:
 770                         if (args->from && match_int(args, &arg))
 771                                 return -EINVAL;
 772                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 773                         set_opt(sbi, FAULT_INJECTION);
 774                         break;
 775
 776                 case Opt_fault_type:
 777                         if (args->from && match_int(args, &arg))
 778                                 return -EINVAL;
 779                         f2fs_build_fault_attr(sbi, 0, arg);
 780                         set_opt(sbi, FAULT_INJECTION);
 781                         break;
 782 #else
 783                 case Opt_fault_injection:
 784                         f2fs_info(sbi, "fault_injection options not supported");
 785                         break;
 786
 787                 case Opt_fault_type:
 788                         f2fs_info(sbi, "fault_type options not supported");
 789                         break;
 790 #endif
 791                 case Opt_lazytime:
 792                         sb->s_flags |= SB_LAZYTIME;
 793                         break;
 794                 case Opt_nolazytime:
 795                         sb->s_flags &= ~SB_LAZYTIME;
 796                         break;
 797 #ifdef CONFIG_QUOTA
 798                 case Opt_quota:
 799                 case Opt_usrquota:
 800                         set_opt(sbi, USRQUOTA);
 801                         break;
 802                 case Opt_grpquota:
 803                         set_opt(sbi, GRPQUOTA);
 804                         break;
 805                 case Opt_prjquota:
 806                         set_opt(sbi, PRJQUOTA);
 807                         break;
 808                 case Opt_usrjquota:
 809                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 810                         if (ret)
 811                                 return ret;
 812                         break;
 813                 case Opt_grpjquota:
 814                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 815                         if (ret)
 816                                 return ret;
 817                         break;
 818                 case Opt_prjjquota:
 819                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 820                         if (ret)
 821                                 return ret;
 822                         break;
 823                 case Opt_offusrjquota:
 824                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 825                         if (ret)
 826                                 return ret;
 827                         break;
 828                 case Opt_offgrpjquota:
 829                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 830                         if (ret)
 831                                 return ret;
 832                         break;
 833                 case Opt_offprjjquota:
 834                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 835                         if (ret)
 836                                 return ret;
 837                         break;
 838                 case Opt_jqfmt_vfsold:
 839                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 840                         break;
 841                 case Opt_jqfmt_vfsv0:
 842                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 843                         break;
 844                 case Opt_jqfmt_vfsv1:
 845                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 846                         break;
 847                 case Opt_noquota:
 848                         clear_opt(sbi, QUOTA);
 849                         clear_opt(sbi, USRQUOTA);
 850                         clear_opt(sbi, GRPQUOTA);
 851                         clear_opt(sbi, PRJQUOTA);
 852                         break;
 853 #else
 854                 case Opt_quota:
 855                 case Opt_usrquota:
 856                 case Opt_grpquota:
 857                 case Opt_prjquota:
 858                 case Opt_usrjquota:
 859                 case Opt_grpjquota:
 860                 case Opt_prjjquota:
 861                 case Opt_offusrjquota:
 862                 case Opt_offgrpjquota:
 863                 case Opt_offprjjquota:
 864                 case Opt_jqfmt_vfsold:
 865                 case Opt_jqfmt_vfsv0:
 866                 case Opt_jqfmt_vfsv1:
 867                 case Opt_noquota:
 868                         f2fs_info(sbi, "quota operations not supported");
 869                         break;
 870 #endif
 871                 case Opt_whint:
 872                         name = match_strdup(&args[0]);
 873                         if (!name)
 874                                 return -ENOMEM;
 875                         if (!strcmp(name, "user-based")) {
 876                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
 877                         } else if (!strcmp(name, "off")) {
 878                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
 879                         } else if (!strcmp(name, "fs-based")) {
 880                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
 881                         } else {
 882                                 kfree(name);
 883                                 return -EINVAL;
 884                         }
 885                         kfree(name);
 886                         break;
 887                 case Opt_alloc:
 888                         name = match_strdup(&args[0]);
 889                         if (!name)
 890                                 return -ENOMEM;
 891
 892                         if (!strcmp(name, "default")) {
 893                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 894                         } else if (!strcmp(name, "reuse")) {
 895                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
 896                         } else {
 897                                 kfree(name);
 898                                 return -EINVAL;
 899                         }
 900                         kfree(name);
 901                         break;
 902                 case Opt_fsync:
 903                         name = match_strdup(&args[0]);
 904                         if (!name)
 905                                 return -ENOMEM;
 906                         if (!strcmp(name, "posix")) {
 907                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
 908                         } else if (!strcmp(name, "strict")) {
 909                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
 910                         } else if (!strcmp(name, "nobarrier")) {
 911                                 F2FS_OPTION(sbi).fsync_mode =
 912                                                         FSYNC_MODE_NOBARRIER;
 913                         } else {
 914                                 kfree(name);
 915                                 return -EINVAL;
 916                         }
 917                         kfree(name);
 918                         break;
 919                 case Opt_test_dummy_encryption:
 920                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
 921                                                              is_remount);
 922                         if (ret)
 923                                 return ret;
 924                         break;
 925                 case Opt_inlinecrypt:
 926 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
 927                         sb->s_flags |= SB_INLINECRYPT;
 928 #else
 929                         f2fs_info(sbi, "inline encryption not supported");
 930 #endif
 931                         break;
 932                 case Opt_checkpoint_disable_cap_perc:
 933                         if (args->from && match_int(args, &arg))
 934                                 return -EINVAL;
 935                         if (arg < 0 || arg > 100)
 936                                 return -EINVAL;
 937                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
 938                         set_opt(sbi, DISABLE_CHECKPOINT);
 939                         break;
 940                 case Opt_checkpoint_disable_cap:
 941                         if (args->from && match_int(args, &arg))
 942                                 return -EINVAL;
 943                         F2FS_OPTION(sbi).unusable_cap = arg;
 944                         set_opt(sbi, DISABLE_CHECKPOINT);
 945                         break;
 946                 case Opt_checkpoint_disable:
 947                         set_opt(sbi, DISABLE_CHECKPOINT);
 948                         break;
 949                 case Opt_checkpoint_enable:
 950                         clear_opt(sbi, DISABLE_CHECKPOINT);
 951                         break;
 952                 case Opt_checkpoint_merge:
 953                         set_opt(sbi, MERGE_CHECKPOINT);
 954                         break;
 955                 case Opt_nocheckpoint_merge:
 956                         clear_opt(sbi, MERGE_CHECKPOINT);
 957                         break;
 958 #ifdef CONFIG_F2FS_FS_COMPRESSION
 959                 case Opt_compress_algorithm:
 960                         if (!f2fs_sb_has_compression(sbi)) {
 961                                 f2fs_info(sbi, "Image doesn't support compression");
 962                                 break;
 963                         }
 964                         name = match_strdup(&args[0]);
 965                         if (!name)
 966                                 return -ENOMEM;
 967                         if (!strcmp(name, "lzo")) {
 968 #ifdef CONFIG_F2FS_FS_LZO
 969                                 F2FS_OPTION(sbi).compress_level = 0;
 970                                 F2FS_OPTION(sbi).compress_algorithm =
 971                                                                 COMPRESS_LZO;
 972 #else
 973                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
 974 #endif
 975                         } else if (!strncmp(name, "lz4", 3)) {
 976 #ifdef CONFIG_F2FS_FS_LZ4
 977                                 ret = f2fs_set_lz4hc_level(sbi, name);
 978                                 if (ret) {
 979                                         kfree(name);
 980                                         return -EINVAL;
 981                                 }
 982                                 F2FS_OPTION(sbi).compress_algorithm =
 983                                                                 COMPRESS_LZ4;
 984 #else
 985                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
 986 #endif
 987                         } else if (!strncmp(name, "zstd", 4)) {
 988 #ifdef CONFIG_F2FS_FS_ZSTD
 989                                 ret = f2fs_set_zstd_level(sbi, name);
 990                                 if (ret) {
 991                                         kfree(name);
 992                                         return -EINVAL;
 993                                 }
 994                                 F2FS_OPTION(sbi).compress_algorithm =
 995                                                                 COMPRESS_ZSTD;
 996 #else
 997                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
 998 #endif
 999                         } else if (!strcmp(name, "lzo-rle")) {
1000 #ifdef CONFIG_F2FS_FS_LZORLE
1001                                 F2FS_OPTION(sbi).compress_level = 0;
1002                                 F2FS_OPTION(sbi).compress_algorithm =
1003                                                                 COMPRESS_LZORLE;
1004 #else
1005                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1006 #endif
1007                         } else {
1008                                 kfree(name);
1009                                 return -EINVAL;
1010                         }
1011                         kfree(name);
1012                         break;
1013                 case Opt_compress_log_size:
1014                         if (!f2fs_sb_has_compression(sbi)) {
1015                                 f2fs_info(sbi, "Image doesn't support compression");
1016                                 break;
1017                         }
1018                         if (args->from && match_int(args, &arg))
1019                                 return -EINVAL;
1020                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1021                                 arg > MAX_COMPRESS_LOG_SIZE) {
1022                                 f2fs_err(sbi,
1023                                         "Compress cluster log size is out of range");
1024                                 return -EINVAL;
1025                         }
1026                         F2FS_OPTION(sbi).compress_log_size = arg;
1027                         break;
1028                 case Opt_compress_extension:
1029                         if (!f2fs_sb_has_compression(sbi)) {
1030                                 f2fs_info(sbi, "Image doesn't support compression");
1031                                 break;
1032                         }
1033                         name = match_strdup(&args[0]);
1034                         if (!name)
1035                                 return -ENOMEM;
1036
1037                         ext = F2FS_OPTION(sbi).extensions;
1038                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1039
1040                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1041                                 ext_cnt >= COMPRESS_EXT_NUM) {
1042                                 f2fs_err(sbi,
1043                                         "invalid extension length/number");
1044                                 kfree(name);
1045                                 return -EINVAL;
1046                         }
1047
1048                         strcpy(ext[ext_cnt], name);
1049                         F2FS_OPTION(sbi).compress_ext_cnt++;
1050                         kfree(name);
1051                         break;
1052                 case Opt_compress_chksum:
1053                         F2FS_OPTION(sbi).compress_chksum = true;
1054                         break;
1055                 case Opt_compress_mode:
1056                         name = match_strdup(&args[0]);
1057                         if (!name)
1058                                 return -ENOMEM;
1059                         if (!strcmp(name, "fs")) {
1060                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1061                         } else if (!strcmp(name, "user")) {
1062                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1063                         } else {
1064                                 kfree(name);
1065                                 return -EINVAL;
1066                         }
1067                         kfree(name);
1068                         break;
1069 #else
1070                 case Opt_compress_algorithm:
1071                 case Opt_compress_log_size:
1072                 case Opt_compress_extension:
1073                 case Opt_compress_chksum:
1074                 case Opt_compress_mode:
1075                         f2fs_info(sbi, "compression options not supported");
1076                         break;
1077 #endif
1078                 case Opt_atgc:
1079                         set_opt(sbi, ATGC);
1080                         break;
1081                 case Opt_gc_merge:
1082                         set_opt(sbi, GC_MERGE);
1083                         break;
1084                 case Opt_nogc_merge:
1085                         clear_opt(sbi, GC_MERGE);
1086                         break;
1087                 default:
1088                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1089                                  p);
1090                         return -EINVAL;
1091                 }
1092         }
1093 #ifdef CONFIG_QUOTA
1094         if (f2fs_check_quota_options(sbi))
1095                 return -EINVAL;
1096 #else
1097         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1098                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1099                 return -EINVAL;
1100         }
1101         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1102                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1103                 return -EINVAL;
1104         }
1105 #endif
1106 #ifndef CONFIG_UNICODE
1107         if (f2fs_sb_has_casefold(sbi)) {
1108                 f2fs_err(sbi,
1109                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1110                 return -EINVAL;
1111         }
1112 #endif
1113         /*
1114          * The BLKZONED feature indicates that the drive was formatted with
1115          * zone alignment optimization. This is optional for host-aware
1116          * devices, but mandatory for host-managed zoned block devices.
1117          */
1118 #ifndef CONFIG_BLK_DEV_ZONED
1119         if (f2fs_sb_has_blkzoned(sbi)) {
1120                 f2fs_err(sbi, "Zoned block device support is not enabled");
1121                 return -EINVAL;
1122         }
1123 #endif
1124
1125         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1126                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1127                          F2FS_IO_SIZE_KB(sbi));
1128                 return -EINVAL;
1129         }
1130
1131         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1132                 int min_size, max_size;
1133
1134                 if (!f2fs_sb_has_extra_attr(sbi) ||
1135                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1136                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1137                         return -EINVAL;
1138                 }
1139                 if (!test_opt(sbi, INLINE_XATTR)) {
1140                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1141                         return -EINVAL;
1142                 }
1143
1144                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1145                 max_size = MAX_INLINE_XATTR_SIZE;
1146
1147                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1148                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1149                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1150                                  min_size, max_size);
1151                         return -EINVAL;
1152                 }
1153         }
1154
1155         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1156                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
1157                 return -EINVAL;
1158         }
1159
1160         /* Not pass down write hints if the number of active logs is lesser
1161          * than NR_CURSEG_PERSIST_TYPE.
1162          */
1163         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
1164                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1165         return 0;
1166 }
1167
1168 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1169 {
1170         struct f2fs_inode_info *fi;
1171
1172         fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
1173         if (!fi)
1174                 return NULL;
1175
1176         init_once((void *) fi);
1177
1178         /* Initialize f2fs-specific inode info */
1179         atomic_set(&fi->dirty_pages, 0);
1180         atomic_set(&fi->i_compr_blocks, 0);
1181         init_rwsem(&fi->i_sem);
1182         spin_lock_init(&fi->i_size_lock);
1183         INIT_LIST_HEAD(&fi->dirty_list);
1184         INIT_LIST_HEAD(&fi->gdirty_list);
1185         INIT_LIST_HEAD(&fi->inmem_ilist);
1186         INIT_LIST_HEAD(&fi->inmem_pages);
1187         mutex_init(&fi->inmem_lock);
1188         init_rwsem(&fi->i_gc_rwsem[READ]);
1189         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1190         init_rwsem(&fi->i_mmap_sem);
1191         init_rwsem(&fi->i_xattr_sem);
1192
1193         /* Will be used by directory only */
1194         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1195
1196         return &fi->vfs_inode;
1197 }
1198
1199 static int f2fs_drop_inode(struct inode *inode)
1200 {
1201         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1202         int ret;
1203
1204         /*
1205          * during filesystem shutdown, if checkpoint is disabled,
1206          * drop useless meta/node dirty pages.
1207          */
1208         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1209                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1210                         inode->i_ino == F2FS_META_INO(sbi)) {
1211                         trace_f2fs_drop_inode(inode, 1);
1212                         return 1;
1213                 }
1214         }
1215
1216         /*
1217          * This is to avoid a deadlock condition like below.
1218          * writeback_single_inode(inode)
1219          *  - f2fs_write_data_page
1220          *    - f2fs_gc -> iput -> evict
1221          *       - inode_wait_for_writeback(inode)
1222          */
1223         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1224                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1225                         /* to avoid evict_inode call simultaneously */
1226                         atomic_inc(&inode->i_count);
1227                         spin_unlock(&inode->i_lock);
1228
1229                         /* some remained atomic pages should discarded */
1230                         if (f2fs_is_atomic_file(inode))
1231                                 f2fs_drop_inmem_pages(inode);
1232
1233                         /* should remain fi->extent_tree for writepage */
1234                         f2fs_destroy_extent_node(inode);
1235
1236                         sb_start_intwrite(inode->i_sb);
1237                         f2fs_i_size_write(inode, 0);
1238
1239                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1240                                         inode, NULL, 0, DATA);
1241                         truncate_inode_pages_final(inode->i_mapping);
1242
1243                         if (F2FS_HAS_BLOCKS(inode))
1244                                 f2fs_truncate(inode);
1245
1246                         sb_end_intwrite(inode->i_sb);
1247
1248                         spin_lock(&inode->i_lock);
1249                         atomic_dec(&inode->i_count);
1250                 }
1251                 trace_f2fs_drop_inode(inode, 0);
1252                 return 0;
1253         }
1254         ret = generic_drop_inode(inode);
1255         if (!ret)
1256                 ret = fscrypt_drop_inode(inode);
1257         trace_f2fs_drop_inode(inode, ret);
1258         return ret;
1259 }
1260
1261 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1262 {
1263         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1264         int ret = 0;
1265
1266         spin_lock(&sbi->inode_lock[DIRTY_META]);
1267         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1268                 ret = 1;
1269         } else {
1270                 set_inode_flag(inode, FI_DIRTY_INODE);
1271                 stat_inc_dirty_inode(sbi, DIRTY_META);
1272         }
1273         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1274                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1275                                 &sbi->inode_list[DIRTY_META]);
1276                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1277         }
1278         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1279         return ret;
1280 }
1281
1282 void f2fs_inode_synced(struct inode *inode)
1283 {
1284         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1285
1286         spin_lock(&sbi->inode_lock[DIRTY_META]);
1287         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1288                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1289                 return;
1290         }
1291         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1292                 list_del_init(&F2FS_I(inode)->gdirty_list);
1293                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1294         }
1295         clear_inode_flag(inode, FI_DIRTY_INODE);
1296         clear_inode_flag(inode, FI_AUTO_RECOVER);
1297         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1298         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1299 }
1300
1301 /*
1302  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1303  *
1304  * We should call set_dirty_inode to write the dirty inode through write_inode.
1305  */
1306 static void f2fs_dirty_inode(struct inode *inode, int flags)
1307 {
1308         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1309
1310         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1311                         inode->i_ino == F2FS_META_INO(sbi))
1312                 return;
1313
1314         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1315                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1316
1317         f2fs_inode_dirtied(inode, false);
1318 }
1319
1320 static void f2fs_free_inode(struct inode *inode)
1321 {
1322         fscrypt_free_inode(inode);
1323         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1324 }
1325
1326 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1327 {
1328         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1329         percpu_counter_destroy(&sbi->total_valid_inode_count);
1330 }
1331
1332 static void destroy_device_list(struct f2fs_sb_info *sbi)
1333 {
1334         int i;
1335
1336         for (i = 0; i < sbi->s_ndevs; i++) {
1337                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1338 #ifdef CONFIG_BLK_DEV_ZONED
1339                 kvfree(FDEV(i).blkz_seq);
1340                 kfree(FDEV(i).zone_capacity_blocks);
1341 #endif
1342         }
1343         kvfree(sbi->devs);
1344 }
1345
1346 static void f2fs_put_super(struct super_block *sb)
1347 {
1348         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1349         int i;
1350         bool dropped;
1351
1352         /* unregister procfs/sysfs entries in advance to avoid race case */
1353         f2fs_unregister_sysfs(sbi);
1354
1355         f2fs_quota_off_umount(sb);
1356
1357         /* prevent remaining shrinker jobs */
1358         mutex_lock(&sbi->umount_mutex);
1359
1360         /*
1361          * flush all issued checkpoints and stop checkpoint issue thread.
1362          * after then, all checkpoints should be done by each process context.
1363          */
1364         f2fs_stop_ckpt_thread(sbi);
1365
1366         /*
1367          * We don't need to do checkpoint when superblock is clean.
1368          * But, the previous checkpoint was not done by umount, it needs to do
1369          * clean checkpoint again.
1370          */
1371         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1372                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1373                 struct cp_control cpc = {
1374                         .reason = CP_UMOUNT,
1375                 };
1376                 f2fs_write_checkpoint(sbi, &cpc);
1377         }
1378
1379         /* be sure to wait for any on-going discard commands */
1380         dropped = f2fs_issue_discard_timeout(sbi);
1381
1382         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1383                                         !sbi->discard_blks && !dropped) {
1384                 struct cp_control cpc = {
1385                         .reason = CP_UMOUNT | CP_TRIMMED,
1386                 };
1387                 f2fs_write_checkpoint(sbi, &cpc);
1388         }
1389
1390         /*
1391          * normally superblock is clean, so we need to release this.
1392          * In addition, EIO will skip do checkpoint, we need this as well.
1393          */
1394         f2fs_release_ino_entry(sbi, true);
1395
1396         f2fs_leave_shrinker(sbi);
1397         mutex_unlock(&sbi->umount_mutex);
1398
1399         /* our cp_error case, we can wait for any writeback page */
1400         f2fs_flush_merged_writes(sbi);
1401
1402         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1403
1404         f2fs_bug_on(sbi, sbi->fsync_node_num);
1405
1406         iput(sbi->node_inode);
1407         sbi->node_inode = NULL;
1408
1409         iput(sbi->meta_inode);
1410         sbi->meta_inode = NULL;
1411
1412         /*
1413          * iput() can update stat information, if f2fs_write_checkpoint()
1414          * above failed with error.
1415          */
1416         f2fs_destroy_stats(sbi);
1417
1418         /* destroy f2fs internal modules */
1419         f2fs_destroy_node_manager(sbi);
1420         f2fs_destroy_segment_manager(sbi);
1421
1422         f2fs_destroy_post_read_wq(sbi);
1423
1424         kvfree(sbi->ckpt);
1425
1426         sb->s_fs_info = NULL;
1427         if (sbi->s_chksum_driver)
1428                 crypto_free_shash(sbi->s_chksum_driver);
1429         kfree(sbi->raw_super);
1430
1431         destroy_device_list(sbi);
1432         f2fs_destroy_page_array_cache(sbi);
1433         f2fs_destroy_xattr_caches(sbi);
1434         mempool_destroy(sbi->write_io_dummy);
1435 #ifdef CONFIG_QUOTA
1436         for (i = 0; i < MAXQUOTAS; i++)
1437                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1438 #endif
1439         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1440         destroy_percpu_info(sbi);
1441         for (i = 0; i < NR_PAGE_TYPE; i++)
1442                 kvfree(sbi->write_io[i]);
1443 #ifdef CONFIG_UNICODE
1444         utf8_unload(sb->s_encoding);
1445 #endif
1446         kfree(sbi);
1447 }
1448
1449 int f2fs_sync_fs(struct super_block *sb, int sync)
1450 {
1451         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1452         int err = 0;
1453
1454         if (unlikely(f2fs_cp_error(sbi)))
1455                 return 0;
1456         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1457                 return 0;
1458
1459         trace_f2fs_sync_fs(sb, sync);
1460
1461         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1462                 return -EAGAIN;
1463
1464         if (sync)
1465                 err = f2fs_issue_checkpoint(sbi);
1466
1467         return err;
1468 }
1469
1470 static int f2fs_freeze(struct super_block *sb)
1471 {
1472         if (f2fs_readonly(sb))
1473                 return 0;
1474
1475         /* IO error happened before */
1476         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1477                 return -EIO;
1478
1479         /* must be clean, since sync_filesystem() was already called */
1480         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1481                 return -EINVAL;
1482
1483         /* ensure no checkpoint required */
1484         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1485                 return -EINVAL;
1486         return 0;
1487 }
1488
1489 static int f2fs_unfreeze(struct super_block *sb)
1490 {
1491         return 0;
1492 }
1493
1494 #ifdef CONFIG_QUOTA
1495 static int f2fs_statfs_project(struct super_block *sb,
1496                                 kprojid_t projid, struct kstatfs *buf)
1497 {
1498         struct kqid qid;
1499         struct dquot *dquot;
1500         u64 limit;
1501         u64 curblock;
1502
1503         qid = make_kqid_projid(projid);
1504         dquot = dqget(sb, qid);
1505         if (IS_ERR(dquot))
1506                 return PTR_ERR(dquot);
1507         spin_lock(&dquot->dq_dqb_lock);
1508
1509         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1510                                         dquot->dq_dqb.dqb_bhardlimit);
1511         if (limit)
1512                 limit >>= sb->s_blocksize_bits;
1513
1514         if (limit && buf->f_blocks > limit) {
1515                 curblock = (dquot->dq_dqb.dqb_curspace +
1516                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1517                 buf->f_blocks = limit;
1518                 buf->f_bfree = buf->f_bavail =
1519                         (buf->f_blocks > curblock) ?
1520                          (buf->f_blocks - curblock) : 0;
1521         }
1522
1523         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1524                                         dquot->dq_dqb.dqb_ihardlimit);
1525
1526         if (limit && buf->f_files > limit) {
1527                 buf->f_files = limit;
1528                 buf->f_ffree =
1529                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1530                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1531         }
1532
1533         spin_unlock(&dquot->dq_dqb_lock);
1534         dqput(dquot);
1535         return 0;
1536 }
1537 #endif
1538
1539 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1540 {
1541         struct super_block *sb = dentry->d_sb;
1542         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1543         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1544         block_t total_count, user_block_count, start_count;
1545         u64 avail_node_count;
1546
1547         total_count = le64_to_cpu(sbi->raw_super->block_count);
1548         user_block_count = sbi->user_block_count;
1549         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1550         buf->f_type = F2FS_SUPER_MAGIC;
1551         buf->f_bsize = sbi->blocksize;
1552
1553         buf->f_blocks = total_count - start_count;
1554         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1555                                                 sbi->current_reserved_blocks;
1556
1557         spin_lock(&sbi->stat_lock);
1558         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1559                 buf->f_bfree = 0;
1560         else
1561                 buf->f_bfree -= sbi->unusable_block_count;
1562         spin_unlock(&sbi->stat_lock);
1563
1564         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1565                 buf->f_bavail = buf->f_bfree -
1566                                 F2FS_OPTION(sbi).root_reserved_blocks;
1567         else
1568                 buf->f_bavail = 0;
1569
1570         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1571
1572         if (avail_node_count > user_block_count) {
1573                 buf->f_files = user_block_count;
1574                 buf->f_ffree = buf->f_bavail;
1575         } else {
1576                 buf->f_files = avail_node_count;
1577                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1578                                         buf->f_bavail);
1579         }
1580
1581         buf->f_namelen = F2FS_NAME_LEN;
1582         buf->f_fsid    = u64_to_fsid(id);
1583
1584 #ifdef CONFIG_QUOTA
1585         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1586                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1587                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1588         }
1589 #endif
1590         return 0;
1591 }
1592
1593 static inline void f2fs_show_quota_options(struct seq_file *seq,
1594                                            struct super_block *sb)
1595 {
1596 #ifdef CONFIG_QUOTA
1597         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1598
1599         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1600                 char *fmtname = "";
1601
1602                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1603                 case QFMT_VFS_OLD:
1604                         fmtname = "vfsold";
1605                         break;
1606                 case QFMT_VFS_V0:
1607                         fmtname = "vfsv0";
1608                         break;
1609                 case QFMT_VFS_V1:
1610                         fmtname = "vfsv1";
1611                         break;
1612                 }
1613                 seq_printf(seq, ",jqfmt=%s", fmtname);
1614         }
1615
1616         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1617                 seq_show_option(seq, "usrjquota",
1618                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1619
1620         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1621                 seq_show_option(seq, "grpjquota",
1622                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1623
1624         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1625                 seq_show_option(seq, "prjjquota",
1626                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1627 #endif
1628 }
1629
1630 #ifdef CONFIG_F2FS_FS_COMPRESSION
1631 static inline void f2fs_show_compress_options(struct seq_file *seq,
1632                                                         struct super_block *sb)
1633 {
1634         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1635         char *algtype = "";
1636         int i;
1637
1638         if (!f2fs_sb_has_compression(sbi))
1639                 return;
1640
1641         switch (F2FS_OPTION(sbi).compress_algorithm) {
1642         case COMPRESS_LZO:
1643                 algtype = "lzo";
1644                 break;
1645         case COMPRESS_LZ4:
1646                 algtype = "lz4";
1647                 break;
1648         case COMPRESS_ZSTD:
1649                 algtype = "zstd";
1650                 break;
1651         case COMPRESS_LZORLE:
1652                 algtype = "lzo-rle";
1653                 break;
1654         }
1655         seq_printf(seq, ",compress_algorithm=%s", algtype);
1656
1657         if (F2FS_OPTION(sbi).compress_level)
1658                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1659
1660         seq_printf(seq, ",compress_log_size=%u",
1661                         F2FS_OPTION(sbi).compress_log_size);
1662
1663         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1664                 seq_printf(seq, ",compress_extension=%s",
1665                         F2FS_OPTION(sbi).extensions[i]);
1666         }
1667
1668         if (F2FS_OPTION(sbi).compress_chksum)
1669                 seq_puts(seq, ",compress_chksum");
1670
1671         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1672                 seq_printf(seq, ",compress_mode=%s", "fs");
1673         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1674                 seq_printf(seq, ",compress_mode=%s", "user");
1675 }
1676 #endif
1677
1678 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1679 {
1680         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1681
1682         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1683                 seq_printf(seq, ",background_gc=%s", "sync");
1684         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1685                 seq_printf(seq, ",background_gc=%s", "on");
1686         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1687                 seq_printf(seq, ",background_gc=%s", "off");
1688
1689         if (test_opt(sbi, GC_MERGE))
1690                 seq_puts(seq, ",gc_merge");
1691
1692         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1693                 seq_puts(seq, ",disable_roll_forward");
1694         if (test_opt(sbi, NORECOVERY))
1695                 seq_puts(seq, ",norecovery");
1696         if (test_opt(sbi, DISCARD))
1697                 seq_puts(seq, ",discard");
1698         else
1699                 seq_puts(seq, ",nodiscard");
1700         if (test_opt(sbi, NOHEAP))
1701                 seq_puts(seq, ",no_heap");
1702         else
1703                 seq_puts(seq, ",heap");
1704 #ifdef CONFIG_F2FS_FS_XATTR
1705         if (test_opt(sbi, XATTR_USER))
1706                 seq_puts(seq, ",user_xattr");
1707         else
1708                 seq_puts(seq, ",nouser_xattr");
1709         if (test_opt(sbi, INLINE_XATTR))
1710                 seq_puts(seq, ",inline_xattr");
1711         else
1712                 seq_puts(seq, ",noinline_xattr");
1713         if (test_opt(sbi, INLINE_XATTR_SIZE))
1714                 seq_printf(seq, ",inline_xattr_size=%u",
1715                                         F2FS_OPTION(sbi).inline_xattr_size);
1716 #endif
1717 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1718         if (test_opt(sbi, POSIX_ACL))
1719                 seq_puts(seq, ",acl");
1720         else
1721                 seq_puts(seq, ",noacl");
1722 #endif
1723         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1724                 seq_puts(seq, ",disable_ext_identify");
1725         if (test_opt(sbi, INLINE_DATA))
1726                 seq_puts(seq, ",inline_data");
1727         else
1728                 seq_puts(seq, ",noinline_data");
1729         if (test_opt(sbi, INLINE_DENTRY))
1730                 seq_puts(seq, ",inline_dentry");
1731         else
1732                 seq_puts(seq, ",noinline_dentry");
1733         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1734                 seq_puts(seq, ",flush_merge");
1735         if (test_opt(sbi, NOBARRIER))
1736                 seq_puts(seq, ",nobarrier");
1737         if (test_opt(sbi, FASTBOOT))
1738                 seq_puts(seq, ",fastboot");
1739         if (test_opt(sbi, EXTENT_CACHE))
1740                 seq_puts(seq, ",extent_cache");
1741         else
1742                 seq_puts(seq, ",noextent_cache");
1743         if (test_opt(sbi, DATA_FLUSH))
1744                 seq_puts(seq, ",data_flush");
1745
1746         seq_puts(seq, ",mode=");
1747         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1748                 seq_puts(seq, "adaptive");
1749         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1750                 seq_puts(seq, "lfs");
1751         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1752         if (test_opt(sbi, RESERVE_ROOT))
1753                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1754                                 F2FS_OPTION(sbi).root_reserved_blocks,
1755                                 from_kuid_munged(&init_user_ns,
1756                                         F2FS_OPTION(sbi).s_resuid),
1757                                 from_kgid_munged(&init_user_ns,
1758                                         F2FS_OPTION(sbi).s_resgid));
1759         if (F2FS_IO_SIZE_BITS(sbi))
1760                 seq_printf(seq, ",io_bits=%u",
1761                                 F2FS_OPTION(sbi).write_io_size_bits);
1762 #ifdef CONFIG_F2FS_FAULT_INJECTION
1763         if (test_opt(sbi, FAULT_INJECTION)) {
1764                 seq_printf(seq, ",fault_injection=%u",
1765                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1766                 seq_printf(seq, ",fault_type=%u",
1767                                 F2FS_OPTION(sbi).fault_info.inject_type);
1768         }
1769 #endif
1770 #ifdef CONFIG_QUOTA
1771         if (test_opt(sbi, QUOTA))
1772                 seq_puts(seq, ",quota");
1773         if (test_opt(sbi, USRQUOTA))
1774                 seq_puts(seq, ",usrquota");
1775         if (test_opt(sbi, GRPQUOTA))
1776                 seq_puts(seq, ",grpquota");
1777         if (test_opt(sbi, PRJQUOTA))
1778                 seq_puts(seq, ",prjquota");
1779 #endif
1780         f2fs_show_quota_options(seq, sbi->sb);
1781         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1782                 seq_printf(seq, ",whint_mode=%s", "user-based");
1783         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1784                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1785
1786         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1787
1788         if (sbi->sb->s_flags & SB_INLINECRYPT)
1789                 seq_puts(seq, ",inlinecrypt");
1790
1791         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1792                 seq_printf(seq, ",alloc_mode=%s", "default");
1793         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1794                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1795
1796         if (test_opt(sbi, DISABLE_CHECKPOINT))
1797                 seq_printf(seq, ",checkpoint=disable:%u",
1798                                 F2FS_OPTION(sbi).unusable_cap);
1799         if (test_opt(sbi, MERGE_CHECKPOINT))
1800                 seq_puts(seq, ",checkpoint_merge");
1801         else
1802                 seq_puts(seq, ",nocheckpoint_merge");
1803         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1804                 seq_printf(seq, ",fsync_mode=%s", "posix");
1805         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1806                 seq_printf(seq, ",fsync_mode=%s", "strict");
1807         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1808                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1809
1810 #ifdef CONFIG_F2FS_FS_COMPRESSION
1811         f2fs_show_compress_options(seq, sbi->sb);
1812 #endif
1813
1814         if (test_opt(sbi, ATGC))
1815                 seq_puts(seq, ",atgc");
1816         return 0;
1817 }
1818
1819 static void default_options(struct f2fs_sb_info *sbi)
1820 {
1821         /* init some FS parameters */
1822         F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
1823         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1824         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1825         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1826         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1827         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1828         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1829         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1830         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1831         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1832         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1833         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1834
1835         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1836
1837         set_opt(sbi, INLINE_XATTR);
1838         set_opt(sbi, INLINE_DATA);
1839         set_opt(sbi, INLINE_DENTRY);
1840         set_opt(sbi, EXTENT_CACHE);
1841         set_opt(sbi, NOHEAP);
1842         clear_opt(sbi, DISABLE_CHECKPOINT);
1843         set_opt(sbi, MERGE_CHECKPOINT);
1844         F2FS_OPTION(sbi).unusable_cap = 0;
1845         sbi->sb->s_flags |= SB_LAZYTIME;
1846         set_opt(sbi, FLUSH_MERGE);
1847         set_opt(sbi, DISCARD);
1848         if (f2fs_sb_has_blkzoned(sbi))
1849                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
1850         else
1851                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
1852
1853 #ifdef CONFIG_F2FS_FS_XATTR
1854         set_opt(sbi, XATTR_USER);
1855 #endif
1856 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1857         set_opt(sbi, POSIX_ACL);
1858 #endif
1859
1860         f2fs_build_fault_attr(sbi, 0, 0);
1861 }
1862
1863 #ifdef CONFIG_QUOTA
1864 static int f2fs_enable_quotas(struct super_block *sb);
1865 #endif
1866
1867 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1868 {
1869         unsigned int s_flags = sbi->sb->s_flags;
1870         struct cp_control cpc;
1871         int err = 0;
1872         int ret;
1873         block_t unusable;
1874
1875         if (s_flags & SB_RDONLY) {
1876                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1877                 return -EINVAL;
1878         }
1879         sbi->sb->s_flags |= SB_ACTIVE;
1880
1881         f2fs_update_time(sbi, DISABLE_TIME);
1882
1883         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1884                 down_write(&sbi->gc_lock);
1885                 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
1886                 if (err == -ENODATA) {
1887                         err = 0;
1888                         break;
1889                 }
1890                 if (err && err != -EAGAIN)
1891                         break;
1892         }
1893
1894         ret = sync_filesystem(sbi->sb);
1895         if (ret || err) {
1896                 err = ret ? ret : err;
1897                 goto restore_flag;
1898         }
1899
1900         unusable = f2fs_get_unusable_blocks(sbi);
1901         if (f2fs_disable_cp_again(sbi, unusable)) {
1902                 err = -EAGAIN;
1903                 goto restore_flag;
1904         }
1905
1906         down_write(&sbi->gc_lock);
1907         cpc.reason = CP_PAUSE;
1908         set_sbi_flag(sbi, SBI_CP_DISABLED);
1909         err = f2fs_write_checkpoint(sbi, &cpc);
1910         if (err)
1911                 goto out_unlock;
1912
1913         spin_lock(&sbi->stat_lock);
1914         sbi->unusable_block_count = unusable;
1915         spin_unlock(&sbi->stat_lock);
1916
1917 out_unlock:
1918         up_write(&sbi->gc_lock);
1919 restore_flag:
1920         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
1921         return err;
1922 }
1923
1924 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1925 {
1926         /* we should flush all the data to keep data consistency */
1927         sync_inodes_sb(sbi->sb);
1928
1929         down_write(&sbi->gc_lock);
1930         f2fs_dirty_to_prefree(sbi);
1931
1932         clear_sbi_flag(sbi, SBI_CP_DISABLED);
1933         set_sbi_flag(sbi, SBI_IS_DIRTY);
1934         up_write(&sbi->gc_lock);
1935
1936         f2fs_sync_fs(sbi->sb, 1);
1937 }
1938
1939 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1940 {
1941         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1942         struct f2fs_mount_info org_mount_opt;
1943         unsigned long old_sb_flags;
1944         int err;
1945         bool need_restart_gc = false, need_stop_gc = false;
1946         bool need_restart_ckpt = false, need_stop_ckpt = false;
1947         bool need_restart_flush = false, need_stop_flush = false;
1948         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1949         bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1950         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
1951         bool no_atgc = !test_opt(sbi, ATGC);
1952         bool checkpoint_changed;
1953 #ifdef CONFIG_QUOTA
1954         int i, j;
1955 #endif
1956
1957         /*
1958          * Save the old mount options in case we
1959          * need to restore them.
1960          */
1961         org_mount_opt = sbi->mount_opt;
1962         old_sb_flags = sb->s_flags;
1963
1964 #ifdef CONFIG_QUOTA
1965         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1966         for (i = 0; i < MAXQUOTAS; i++) {
1967                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1968                         org_mount_opt.s_qf_names[i] =
1969                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1970                                 GFP_KERNEL);
1971                         if (!org_mount_opt.s_qf_names[i]) {
1972                                 for (j = 0; j < i; j++)
1973                                         kfree(org_mount_opt.s_qf_names[j]);
1974                                 return -ENOMEM;
1975                         }
1976                 } else {
1977                         org_mount_opt.s_qf_names[i] = NULL;
1978                 }
1979         }
1980 #endif
1981
1982         /* recover superblocks we couldn't write due to previous RO mount */
1983         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1984                 err = f2fs_commit_super(sbi, false);
1985                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
1986                           err);
1987                 if (!err)
1988                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1989         }
1990
1991         default_options(sbi);
1992
1993         /* parse mount options */
1994         err = parse_options(sb, data, true);
1995         if (err)
1996                 goto restore_opts;
1997         checkpoint_changed =
1998                         disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1999
2000         /*
2001          * Previous and new state of filesystem is RO,
2002          * so skip checking GC and FLUSH_MERGE conditions.
2003          */
2004         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2005                 goto skip;
2006
2007 #ifdef CONFIG_QUOTA
2008         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2009                 err = dquot_suspend(sb, -1);
2010                 if (err < 0)
2011                         goto restore_opts;
2012         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2013                 /* dquot_resume needs RW */
2014                 sb->s_flags &= ~SB_RDONLY;
2015                 if (sb_any_quota_suspended(sb)) {
2016                         dquot_resume(sb, -1);
2017                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2018                         err = f2fs_enable_quotas(sb);
2019                         if (err)
2020                                 goto restore_opts;
2021                 }
2022         }
2023 #endif
2024         /* disallow enable atgc dynamically */
2025         if (no_atgc == !!test_opt(sbi, ATGC)) {
2026                 err = -EINVAL;
2027                 f2fs_warn(sbi, "switch atgc option is not allowed");
2028                 goto restore_opts;
2029         }
2030
2031         /* disallow enable/disable extent_cache dynamically */
2032         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2033                 err = -EINVAL;
2034                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2035                 goto restore_opts;
2036         }
2037
2038         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2039                 err = -EINVAL;
2040                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2041                 goto restore_opts;
2042         }
2043
2044         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2045                 err = -EINVAL;
2046                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2047                 goto restore_opts;
2048         }
2049
2050         /*
2051          * We stop the GC thread if FS is mounted as RO
2052          * or if background_gc = off is passed in mount
2053          * option. Also sync the filesystem.
2054          */
2055         if ((*flags & SB_RDONLY) ||
2056                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2057                         !test_opt(sbi, GC_MERGE))) {
2058                 if (sbi->gc_thread) {
2059                         f2fs_stop_gc_thread(sbi);
2060                         need_restart_gc = true;
2061                 }
2062         } else if (!sbi->gc_thread) {
2063                 err = f2fs_start_gc_thread(sbi);
2064                 if (err)
2065                         goto restore_opts;
2066                 need_stop_gc = true;
2067         }
2068
2069         if (*flags & SB_RDONLY ||
2070                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
2071                 sync_inodes_sb(sb);
2072
2073                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2074                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2075                 f2fs_sync_fs(sb, 1);
2076                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2077         }
2078
2079         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2080                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2081                 f2fs_stop_ckpt_thread(sbi);
2082                 need_restart_ckpt = true;
2083         } else {
2084                 err = f2fs_start_ckpt_thread(sbi);
2085                 if (err) {
2086                         f2fs_err(sbi,
2087                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2088                             err);
2089                         goto restore_gc;
2090                 }
2091                 need_stop_ckpt = true;
2092         }
2093
2094         /*
2095          * We stop issue flush thread if FS is mounted as RO
2096          * or if flush_merge is not passed in mount option.
2097          */
2098         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2099                 clear_opt(sbi, FLUSH_MERGE);
2100                 f2fs_destroy_flush_cmd_control(sbi, false);
2101                 need_restart_flush = true;
2102         } else {
2103                 err = f2fs_create_flush_cmd_control(sbi);
2104                 if (err)
2105                         goto restore_ckpt;
2106                 need_stop_flush = true;
2107         }
2108
2109         if (checkpoint_changed) {
2110                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2111                         err = f2fs_disable_checkpoint(sbi);
2112                         if (err)
2113                                 goto restore_flush;
2114                 } else {
2115                         f2fs_enable_checkpoint(sbi);
2116                 }
2117         }
2118
2119 skip:
2120 #ifdef CONFIG_QUOTA
2121         /* Release old quota file names */
2122         for (i = 0; i < MAXQUOTAS; i++)
2123                 kfree(org_mount_opt.s_qf_names[i]);
2124 #endif
2125         /* Update the POSIXACL Flag */
2126         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2127                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2128
2129         limit_reserve_root(sbi);
2130         adjust_unusable_cap_perc(sbi);
2131         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2132         return 0;
2133 restore_flush:
2134         if (need_restart_flush) {
2135                 if (f2fs_create_flush_cmd_control(sbi))
2136                         f2fs_warn(sbi, "background flush thread has stopped");
2137         } else if (need_stop_flush) {
2138                 clear_opt(sbi, FLUSH_MERGE);
2139                 f2fs_destroy_flush_cmd_control(sbi, false);
2140         }
2141 restore_ckpt:
2142         if (need_restart_ckpt) {
2143                 if (f2fs_start_ckpt_thread(sbi))
2144                         f2fs_warn(sbi, "background ckpt thread has stopped");
2145         } else if (need_stop_ckpt) {
2146                 f2fs_stop_ckpt_thread(sbi);
2147         }
2148 restore_gc:
2149         if (need_restart_gc) {
2150                 if (f2fs_start_gc_thread(sbi))
2151                         f2fs_warn(sbi, "background gc thread has stopped");
2152         } else if (need_stop_gc) {
2153                 f2fs_stop_gc_thread(sbi);
2154         }
2155 restore_opts:
2156 #ifdef CONFIG_QUOTA
2157         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2158         for (i = 0; i < MAXQUOTAS; i++) {
2159                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2160                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2161         }
2162 #endif
2163         sbi->mount_opt = org_mount_opt;
2164         sb->s_flags = old_sb_flags;
2165         return err;
2166 }
2167
2168 #ifdef CONFIG_QUOTA
2169 /* Read data from quotafile */
2170 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2171                                size_t len, loff_t off)
2172 {
2173         struct inode *inode = sb_dqopt(sb)->files[type];
2174         struct address_space *mapping = inode->i_mapping;
2175         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2176         int offset = off & (sb->s_blocksize - 1);
2177         int tocopy;
2178         size_t toread;
2179         loff_t i_size = i_size_read(inode);
2180         struct page *page;
2181         char *kaddr;
2182
2183         if (off > i_size)
2184                 return 0;
2185
2186         if (off + len > i_size)
2187                 len = i_size - off;
2188         toread = len;
2189         while (toread > 0) {
2190                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2191 repeat:
2192                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2193                 if (IS_ERR(page)) {
2194                         if (PTR_ERR(page) == -ENOMEM) {
2195                                 congestion_wait(BLK_RW_ASYNC,
2196                                                 DEFAULT_IO_TIMEOUT);
2197                                 goto repeat;
2198                         }
2199                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2200                         return PTR_ERR(page);
2201                 }
2202
2203                 lock_page(page);
2204
2205                 if (unlikely(page->mapping != mapping)) {
2206                         f2fs_put_page(page, 1);
2207                         goto repeat;
2208                 }
2209                 if (unlikely(!PageUptodate(page))) {
2210                         f2fs_put_page(page, 1);
2211                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2212                         return -EIO;
2213                 }
2214
2215                 kaddr = kmap_atomic(page);
2216                 memcpy(data, kaddr + offset, tocopy);
2217                 kunmap_atomic(kaddr);
2218                 f2fs_put_page(page, 1);
2219
2220                 offset = 0;
2221                 toread -= tocopy;
2222                 data += tocopy;
2223                 blkidx++;
2224         }
2225         return len;
2226 }
2227
2228 /* Write to quotafile */
2229 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2230                                 const char *data, size_t len, loff_t off)
2231 {
2232         struct inode *inode = sb_dqopt(sb)->files[type];
2233         struct address_space *mapping = inode->i_mapping;
2234         const struct address_space_operations *a_ops = mapping->a_ops;
2235         int offset = off & (sb->s_blocksize - 1);
2236         size_t towrite = len;
2237         struct page *page;
2238         void *fsdata = NULL;
2239         char *kaddr;
2240         int err = 0;
2241         int tocopy;
2242
2243         while (towrite > 0) {
2244                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2245                                                                 towrite);
2246 retry:
2247                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2248                                                         &page, &fsdata);
2249                 if (unlikely(err)) {
2250                         if (err == -ENOMEM) {
2251                                 congestion_wait(BLK_RW_ASYNC,
2252                                                 DEFAULT_IO_TIMEOUT);
2253                                 goto retry;
2254                         }
2255                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2256                         break;
2257                 }
2258
2259                 kaddr = kmap_atomic(page);
2260                 memcpy(kaddr + offset, data, tocopy);
2261                 kunmap_atomic(kaddr);
2262                 flush_dcache_page(page);
2263
2264                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2265                                                 page, fsdata);
2266                 offset = 0;
2267                 towrite -= tocopy;
2268                 off += tocopy;
2269                 data += tocopy;
2270                 cond_resched();
2271         }
2272
2273         if (len == towrite)
2274                 return err;
2275         inode->i_mtime = inode->i_ctime = current_time(inode);
2276         f2fs_mark_inode_dirty_sync(inode, false);
2277         return len - towrite;
2278 }
2279
2280 static struct dquot **f2fs_get_dquots(struct inode *inode)
2281 {
2282         return F2FS_I(inode)->i_dquot;
2283 }
2284
2285 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2286 {
2287         return &F2FS_I(inode)->i_reserved_quota;
2288 }
2289
2290 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2291 {
2292         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2293                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2294                 return 0;
2295         }
2296
2297         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2298                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2299 }
2300
2301 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2302 {
2303         int enabled = 0;
2304         int i, err;
2305
2306         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2307                 err = f2fs_enable_quotas(sbi->sb);
2308                 if (err) {
2309                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2310                         return 0;
2311                 }
2312                 return 1;
2313         }
2314
2315         for (i = 0; i < MAXQUOTAS; i++) {
2316                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2317                         err = f2fs_quota_on_mount(sbi, i);
2318                         if (!err) {
2319                                 enabled = 1;
2320                                 continue;
2321                         }
2322                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2323                                  err, i);
2324                 }
2325         }
2326         return enabled;
2327 }
2328
2329 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2330                              unsigned int flags)
2331 {
2332         struct inode *qf_inode;
2333         unsigned long qf_inum;
2334         int err;
2335
2336         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2337
2338         qf_inum = f2fs_qf_ino(sb, type);
2339         if (!qf_inum)
2340                 return -EPERM;
2341
2342         qf_inode = f2fs_iget(sb, qf_inum);
2343         if (IS_ERR(qf_inode)) {
2344                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2345                 return PTR_ERR(qf_inode);
2346         }
2347
2348         /* Don't account quota for quota files to avoid recursion */
2349         qf_inode->i_flags |= S_NOQUOTA;
2350         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2351         iput(qf_inode);
2352         return err;
2353 }
2354
2355 static int f2fs_enable_quotas(struct super_block *sb)
2356 {
2357         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2358         int type, err = 0;
2359         unsigned long qf_inum;
2360         bool quota_mopt[MAXQUOTAS] = {
2361                 test_opt(sbi, USRQUOTA),
2362                 test_opt(sbi, GRPQUOTA),
2363                 test_opt(sbi, PRJQUOTA),
2364         };
2365
2366         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2367                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2368                 return 0;
2369         }
2370
2371         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2372
2373         for (type = 0; type < MAXQUOTAS; type++) {
2374                 qf_inum = f2fs_qf_ino(sb, type);
2375                 if (qf_inum) {
2376                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2377                                 DQUOT_USAGE_ENABLED |
2378                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2379                         if (err) {
2380                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2381                                          type, err);
2382                                 for (type--; type >= 0; type--)
2383                                         dquot_quota_off(sb, type);
2384                                 set_sbi_flag(F2FS_SB(sb),
2385                                                 SBI_QUOTA_NEED_REPAIR);
2386                                 return err;
2387                         }
2388                 }
2389         }
2390         return 0;
2391 }
2392
2393 int f2fs_quota_sync(struct super_block *sb, int type)
2394 {
2395         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2396         struct quota_info *dqopt = sb_dqopt(sb);
2397         int cnt;
2398         int ret;
2399
2400         /*
2401          * do_quotactl
2402          *  f2fs_quota_sync
2403          *  down_read(quota_sem)
2404          *  dquot_writeback_dquots()
2405          *  f2fs_dquot_commit
2406          *                            block_operation
2407          *                            down_read(quota_sem)
2408          */
2409         f2fs_lock_op(sbi);
2410
2411         down_read(&sbi->quota_sem);
2412         ret = dquot_writeback_dquots(sb, type);
2413         if (ret)
2414                 goto out;
2415
2416         /*
2417          * Now when everything is written we can discard the pagecache so
2418          * that userspace sees the changes.
2419          */
2420         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2421                 struct address_space *mapping;
2422
2423                 if (type != -1 && cnt != type)
2424                         continue;
2425                 if (!sb_has_quota_active(sb, cnt))
2426                         continue;
2427
2428                 mapping = dqopt->files[cnt]->i_mapping;
2429
2430                 ret = filemap_fdatawrite(mapping);
2431                 if (ret)
2432                         goto out;
2433
2434                 /* if we are using journalled quota */
2435                 if (is_journalled_quota(sbi))
2436                         continue;
2437
2438                 ret = filemap_fdatawait(mapping);
2439                 if (ret)
2440                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2441
2442                 inode_lock(dqopt->files[cnt]);
2443                 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
2444                 inode_unlock(dqopt->files[cnt]);
2445         }
2446 out:
2447         if (ret)
2448                 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2449         up_read(&sbi->quota_sem);
2450         f2fs_unlock_op(sbi);
2451         return ret;
2452 }
2453
2454 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2455                                                         const struct path *path)
2456 {
2457         struct inode *inode;
2458         int err;
2459
2460         /* if quota sysfile exists, deny enabling quota with specific file */
2461         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2462                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2463                 return -EBUSY;
2464         }
2465
2466         err = f2fs_quota_sync(sb, type);
2467         if (err)
2468                 return err;
2469
2470         err = dquot_quota_on(sb, type, format_id, path);
2471         if (err)
2472                 return err;
2473
2474         inode = d_inode(path->dentry);
2475
2476         inode_lock(inode);
2477         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2478         f2fs_set_inode_flags(inode);
2479         inode_unlock(inode);
2480         f2fs_mark_inode_dirty_sync(inode, false);
2481
2482         return 0;
2483 }
2484
2485 static int __f2fs_quota_off(struct super_block *sb, int type)
2486 {
2487         struct inode *inode = sb_dqopt(sb)->files[type];
2488         int err;
2489
2490         if (!inode || !igrab(inode))
2491                 return dquot_quota_off(sb, type);
2492
2493         err = f2fs_quota_sync(sb, type);
2494         if (err)
2495                 goto out_put;
2496
2497         err = dquot_quota_off(sb, type);
2498         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2499                 goto out_put;
2500
2501         inode_lock(inode);
2502         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2503         f2fs_set_inode_flags(inode);
2504         inode_unlock(inode);
2505         f2fs_mark_inode_dirty_sync(inode, false);
2506 out_put:
2507         iput(inode);
2508         return err;
2509 }
2510
2511 static int f2fs_quota_off(struct super_block *sb, int type)
2512 {
2513         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2514         int err;
2515
2516         err = __f2fs_quota_off(sb, type);
2517
2518         /*
2519          * quotactl can shutdown journalled quota, result in inconsistence
2520          * between quota record and fs data by following updates, tag the
2521          * flag to let fsck be aware of it.
2522          */
2523         if (is_journalled_quota(sbi))
2524                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2525         return err;
2526 }
2527
2528 void f2fs_quota_off_umount(struct super_block *sb)
2529 {
2530         int type;
2531         int err;
2532
2533         for (type = 0; type < MAXQUOTAS; type++) {
2534                 err = __f2fs_quota_off(sb, type);
2535                 if (err) {
2536                         int ret = dquot_quota_off(sb, type);
2537
2538                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2539                                  type, err, ret);
2540                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2541                 }
2542         }
2543         /*
2544          * In case of checkpoint=disable, we must flush quota blocks.
2545          * This can cause NULL exception for node_inode in end_io, since
2546          * put_super already dropped it.
2547          */
2548         sync_filesystem(sb);
2549 }
2550
2551 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2552 {
2553         struct quota_info *dqopt = sb_dqopt(sb);
2554         int type;
2555
2556         for (type = 0; type < MAXQUOTAS; type++) {
2557                 if (!dqopt->files[type])
2558                         continue;
2559                 f2fs_inode_synced(dqopt->files[type]);
2560         }
2561 }
2562
2563 static int f2fs_dquot_commit(struct dquot *dquot)
2564 {
2565         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2566         int ret;
2567
2568         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2569         ret = dquot_commit(dquot);
2570         if (ret < 0)
2571                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2572         up_read(&sbi->quota_sem);
2573         return ret;
2574 }
2575
2576 static int f2fs_dquot_acquire(struct dquot *dquot)
2577 {
2578         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2579         int ret;
2580
2581         down_read(&sbi->quota_sem);
2582         ret = dquot_acquire(dquot);
2583         if (ret < 0)
2584                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2585         up_read(&sbi->quota_sem);
2586         return ret;
2587 }
2588
2589 static int f2fs_dquot_release(struct dquot *dquot)
2590 {
2591         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2592         int ret = dquot_release(dquot);
2593
2594         if (ret < 0)
2595                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2596         return ret;
2597 }
2598
2599 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2600 {
2601         struct super_block *sb = dquot->dq_sb;
2602         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2603         int ret = dquot_mark_dquot_dirty(dquot);
2604
2605         /* if we are using journalled quota */
2606         if (is_journalled_quota(sbi))
2607                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2608
2609         return ret;
2610 }
2611
2612 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2613 {
2614         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2615         int ret = dquot_commit_info(sb, type);
2616
2617         if (ret < 0)
2618                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2619         return ret;
2620 }
2621
2622 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2623 {
2624         *projid = F2FS_I(inode)->i_projid;
2625         return 0;
2626 }
2627
2628 static const struct dquot_operations f2fs_quota_operations = {
2629         .get_reserved_space = f2fs_get_reserved_space,
2630         .write_dquot    = f2fs_dquot_commit,
2631         .acquire_dquot  = f2fs_dquot_acquire,
2632         .release_dquot  = f2fs_dquot_release,
2633         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2634         .write_info     = f2fs_dquot_commit_info,
2635         .alloc_dquot    = dquot_alloc,
2636         .destroy_dquot  = dquot_destroy,
2637         .get_projid     = f2fs_get_projid,
2638         .get_next_id    = dquot_get_next_id,
2639 };
2640
2641 static const struct quotactl_ops f2fs_quotactl_ops = {
2642         .quota_on       = f2fs_quota_on,
2643         .quota_off      = f2fs_quota_off,
2644         .quota_sync     = f2fs_quota_sync,
2645         .get_state      = dquot_get_state,
2646         .set_info       = dquot_set_dqinfo,
2647         .get_dqblk      = dquot_get_dqblk,
2648         .set_dqblk      = dquot_set_dqblk,
2649         .get_nextdqblk  = dquot_get_next_dqblk,
2650 };
2651 #else
2652 int f2fs_quota_sync(struct super_block *sb, int type)
2653 {
2654         return 0;
2655 }
2656
2657 void f2fs_quota_off_umount(struct super_block *sb)
2658 {
2659 }
2660 #endif
2661
2662 static const struct super_operations f2fs_sops = {
2663         .alloc_inode    = f2fs_alloc_inode,
2664         .free_inode     = f2fs_free_inode,
2665         .drop_inode     = f2fs_drop_inode,
2666         .write_inode    = f2fs_write_inode,
2667         .dirty_inode    = f2fs_dirty_inode,
2668         .show_options   = f2fs_show_options,
2669 #ifdef CONFIG_QUOTA
2670         .quota_read     = f2fs_quota_read,
2671         .quota_write    = f2fs_quota_write,
2672         .get_dquots     = f2fs_get_dquots,
2673 #endif
2674         .evict_inode    = f2fs_evict_inode,
2675         .put_super      = f2fs_put_super,
2676         .sync_fs        = f2fs_sync_fs,
2677         .freeze_fs      = f2fs_freeze,
2678         .unfreeze_fs    = f2fs_unfreeze,
2679         .statfs         = f2fs_statfs,
2680         .remount_fs     = f2fs_remount,
2681 };
2682
2683 #ifdef CONFIG_FS_ENCRYPTION
2684 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2685 {
2686         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2687                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2688                                 ctx, len, NULL);
2689 }
2690
2691 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2692                                                         void *fs_data)
2693 {
2694         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2695
2696         /*
2697          * Encrypting the root directory is not allowed because fsck
2698          * expects lost+found directory to exist and remain unencrypted
2699          * if LOST_FOUND feature is enabled.
2700          *
2701          */
2702         if (f2fs_sb_has_lost_found(sbi) &&
2703                         inode->i_ino == F2FS_ROOT_INO(sbi))
2704                 return -EPERM;
2705
2706         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2707                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2708                                 ctx, len, fs_data, XATTR_CREATE);
2709 }
2710
2711 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2712 {
2713         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2714 }
2715
2716 static bool f2fs_has_stable_inodes(struct super_block *sb)
2717 {
2718         return true;
2719 }
2720
2721 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2722                                        int *ino_bits_ret, int *lblk_bits_ret)
2723 {
2724         *ino_bits_ret = 8 * sizeof(nid_t);
2725         *lblk_bits_ret = 8 * sizeof(block_t);
2726 }
2727
2728 static int f2fs_get_num_devices(struct super_block *sb)
2729 {
2730         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2731
2732         if (f2fs_is_multi_device(sbi))
2733                 return sbi->s_ndevs;
2734         return 1;
2735 }
2736
2737 static void f2fs_get_devices(struct super_block *sb,
2738                              struct request_queue **devs)
2739 {
2740         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2741         int i;
2742
2743         for (i = 0; i < sbi->s_ndevs; i++)
2744                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2745 }
2746
2747 static const struct fscrypt_operations f2fs_cryptops = {
2748         .key_prefix             = "f2fs:",
2749         .get_context            = f2fs_get_context,
2750         .set_context            = f2fs_set_context,
2751         .get_dummy_policy       = f2fs_get_dummy_policy,
2752         .empty_dir              = f2fs_empty_dir,
2753         .max_namelen            = F2FS_NAME_LEN,
2754         .has_stable_inodes      = f2fs_has_stable_inodes,
2755         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2756         .get_num_devices        = f2fs_get_num_devices,
2757         .get_devices            = f2fs_get_devices,
2758 };
2759 #endif
2760
2761 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2762                 u64 ino, u32 generation)
2763 {
2764         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2765         struct inode *inode;
2766
2767         if (f2fs_check_nid_range(sbi, ino))
2768                 return ERR_PTR(-ESTALE);
2769
2770         /*
2771          * f2fs_iget isn't quite right if the inode is currently unallocated!
2772          * However f2fs_iget currently does appropriate checks to handle stale
2773          * inodes so everything is OK.
2774          */
2775         inode = f2fs_iget(sb, ino);
2776         if (IS_ERR(inode))
2777                 return ERR_CAST(inode);
2778         if (unlikely(generation && inode->i_generation != generation)) {
2779                 /* we didn't find the right inode.. */
2780                 iput(inode);
2781                 return ERR_PTR(-ESTALE);
2782         }
2783         return inode;
2784 }
2785
2786 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2787                 int fh_len, int fh_type)
2788 {
2789         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2790                                     f2fs_nfs_get_inode);
2791 }
2792
2793 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2794                 int fh_len, int fh_type)
2795 {
2796         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2797                                     f2fs_nfs_get_inode);
2798 }
2799
2800 static const struct export_operations f2fs_export_ops = {
2801         .fh_to_dentry = f2fs_fh_to_dentry,
2802         .fh_to_parent = f2fs_fh_to_parent,
2803         .get_parent = f2fs_get_parent,
2804 };
2805
2806 loff_t max_file_blocks(struct inode *inode)
2807 {
2808         loff_t result = 0;
2809         loff_t leaf_count;
2810
2811         /*
2812          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2813          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2814          * space in inode.i_addr, it will be more safe to reassign
2815          * result as zero.
2816          */
2817
2818         if (inode && f2fs_compressed_file(inode))
2819                 leaf_count = ADDRS_PER_BLOCK(inode);
2820         else
2821                 leaf_count = DEF_ADDRS_PER_BLOCK;
2822
2823         /* two direct node blocks */
2824         result += (leaf_count * 2);
2825
2826         /* two indirect node blocks */
2827         leaf_count *= NIDS_PER_BLOCK;
2828         result += (leaf_count * 2);
2829
2830         /* one double indirect node block */
2831         leaf_count *= NIDS_PER_BLOCK;
2832         result += leaf_count;
2833
2834         return result;
2835 }
2836
2837 static int __f2fs_commit_super(struct buffer_head *bh,
2838                         struct f2fs_super_block *super)
2839 {
2840         lock_buffer(bh);
2841         if (super)
2842                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2843         set_buffer_dirty(bh);
2844         unlock_buffer(bh);
2845
2846         /* it's rare case, we can do fua all the time */
2847         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2848 }
2849
2850 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2851                                         struct buffer_head *bh)
2852 {
2853         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2854                                         (bh->b_data + F2FS_SUPER_OFFSET);
2855         struct super_block *sb = sbi->sb;
2856         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2857         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2858         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2859         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2860         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2861         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2862         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2863         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2864         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2865         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2866         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2867         u32 segment_count = le32_to_cpu(raw_super->segment_count);
2868         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2869         u64 main_end_blkaddr = main_blkaddr +
2870                                 (segment_count_main << log_blocks_per_seg);
2871         u64 seg_end_blkaddr = segment0_blkaddr +
2872                                 (segment_count << log_blocks_per_seg);
2873
2874         if (segment0_blkaddr != cp_blkaddr) {
2875                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2876                           segment0_blkaddr, cp_blkaddr);
2877                 return true;
2878         }
2879
2880         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2881                                                         sit_blkaddr) {
2882                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2883                           cp_blkaddr, sit_blkaddr,
2884                           segment_count_ckpt << log_blocks_per_seg);
2885                 return true;
2886         }
2887
2888         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2889                                                         nat_blkaddr) {
2890                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2891                           sit_blkaddr, nat_blkaddr,
2892                           segment_count_sit << log_blocks_per_seg);
2893                 return true;
2894         }
2895
2896         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2897                                                         ssa_blkaddr) {
2898                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2899                           nat_blkaddr, ssa_blkaddr,
2900                           segment_count_nat << log_blocks_per_seg);
2901                 return true;
2902         }
2903
2904         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2905                                                         main_blkaddr) {
2906                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2907                           ssa_blkaddr, main_blkaddr,
2908                           segment_count_ssa << log_blocks_per_seg);
2909                 return true;
2910         }
2911
2912         if (main_end_blkaddr > seg_end_blkaddr) {
2913                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
2914                           main_blkaddr, seg_end_blkaddr,
2915                           segment_count_main << log_blocks_per_seg);
2916                 return true;
2917         } else if (main_end_blkaddr < seg_end_blkaddr) {
2918                 int err = 0;
2919                 char *res;
2920
2921                 /* fix in-memory information all the time */
2922                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2923                                 segment0_blkaddr) >> log_blocks_per_seg);
2924
2925                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2926                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2927                         res = "internally";
2928                 } else {
2929                         err = __f2fs_commit_super(bh, NULL);
2930                         res = err ? "failed" : "done";
2931                 }
2932                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
2933                           res, main_blkaddr, seg_end_blkaddr,
2934                           segment_count_main << log_blocks_per_seg);
2935                 if (err)
2936                         return true;
2937         }
2938         return false;
2939 }
2940
2941 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2942                                 struct buffer_head *bh)
2943 {
2944         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
2945         block_t total_sections, blocks_per_seg;
2946         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2947                                         (bh->b_data + F2FS_SUPER_OFFSET);
2948         size_t crc_offset = 0;
2949         __u32 crc = 0;
2950
2951         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
2952                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
2953                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2954                 return -EINVAL;
2955         }
2956
2957         /* Check checksum_offset and crc in superblock */
2958         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2959                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2960                 if (crc_offset !=
2961                         offsetof(struct f2fs_super_block, crc)) {
2962                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
2963                                   crc_offset);
2964                         return -EFSCORRUPTED;
2965                 }
2966                 crc = le32_to_cpu(raw_super->crc);
2967                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2968                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
2969                         return -EFSCORRUPTED;
2970                 }
2971         }
2972
2973         /* Currently, support only 4KB block size */
2974         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
2975                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
2976                           le32_to_cpu(raw_super->log_blocksize),
2977                           F2FS_BLKSIZE_BITS);
2978                 return -EFSCORRUPTED;
2979         }
2980
2981         /* check log blocks per segment */
2982         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2983                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
2984                           le32_to_cpu(raw_super->log_blocks_per_seg));
2985                 return -EFSCORRUPTED;
2986         }
2987
2988         /* Currently, support 512/1024/2048/4096 bytes sector size */
2989         if (le32_to_cpu(raw_super->log_sectorsize) >
2990                                 F2FS_MAX_LOG_SECTOR_SIZE ||
2991                 le32_to_cpu(raw_super->log_sectorsize) <
2992                                 F2FS_MIN_LOG_SECTOR_SIZE) {
2993                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
2994                           le32_to_cpu(raw_super->log_sectorsize));
2995                 return -EFSCORRUPTED;
2996         }
2997         if (le32_to_cpu(raw_super->log_sectors_per_block) +
2998                 le32_to_cpu(raw_super->log_sectorsize) !=
2999                         F2FS_MAX_LOG_SECTOR_SIZE) {
3000                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3001                           le32_to_cpu(raw_super->log_sectors_per_block),
3002                           le32_to_cpu(raw_super->log_sectorsize));
3003                 return -EFSCORRUPTED;
3004         }
3005
3006         segment_count = le32_to_cpu(raw_super->segment_count);
3007         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3008         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3009         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3010         total_sections = le32_to_cpu(raw_super->section_count);
3011
3012         /* blocks_per_seg should be 512, given the above check */
3013         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3014
3015         if (segment_count > F2FS_MAX_SEGMENT ||
3016                                 segment_count < F2FS_MIN_SEGMENTS) {
3017                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3018                 return -EFSCORRUPTED;
3019         }
3020
3021         if (total_sections > segment_count_main || total_sections < 1 ||
3022                         segs_per_sec > segment_count || !segs_per_sec) {
3023                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3024                           segment_count, total_sections, segs_per_sec);
3025                 return -EFSCORRUPTED;
3026         }
3027
3028         if (segment_count_main != total_sections * segs_per_sec) {
3029                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3030                           segment_count_main, total_sections, segs_per_sec);
3031                 return -EFSCORRUPTED;
3032         }
3033
3034         if ((segment_count / segs_per_sec) < total_sections) {
3035                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3036                           segment_count, segs_per_sec, total_sections);
3037                 return -EFSCORRUPTED;
3038         }
3039
3040         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3041                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3042                           segment_count, le64_to_cpu(raw_super->block_count));
3043                 return -EFSCORRUPTED;
3044         }
3045
3046         if (RDEV(0).path[0]) {
3047                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3048                 int i = 1;
3049
3050                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3051                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3052                         i++;
3053                 }
3054                 if (segment_count != dev_seg_count) {
3055                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3056                                         segment_count, dev_seg_count);
3057                         return -EFSCORRUPTED;
3058                 }
3059         } else {
3060                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3061                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3062                         f2fs_info(sbi, "Zoned block device path is missing");
3063                         return -EFSCORRUPTED;
3064                 }
3065         }
3066
3067         if (secs_per_zone > total_sections || !secs_per_zone) {
3068                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3069                           secs_per_zone, total_sections);
3070                 return -EFSCORRUPTED;
3071         }
3072         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3073                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3074                         (le32_to_cpu(raw_super->extension_count) +
3075                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3076                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3077                           le32_to_cpu(raw_super->extension_count),
3078                           raw_super->hot_ext_count,
3079                           F2FS_MAX_EXTENSION);
3080                 return -EFSCORRUPTED;
3081         }
3082
3083         if (le32_to_cpu(raw_super->cp_payload) >
3084                                 (blocks_per_seg - F2FS_CP_PACKS)) {
3085                 f2fs_info(sbi, "Insane cp_payload (%u > %u)",
3086                           le32_to_cpu(raw_super->cp_payload),
3087                           blocks_per_seg - F2FS_CP_PACKS);
3088                 return -EFSCORRUPTED;
3089         }
3090
3091         /* check reserved ino info */
3092         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3093                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3094                 le32_to_cpu(raw_super->root_ino) != 3) {
3095                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3096                           le32_to_cpu(raw_super->node_ino),
3097                           le32_to_cpu(raw_super->meta_ino),
3098                           le32_to_cpu(raw_super->root_ino));
3099                 return -EFSCORRUPTED;
3100         }
3101
3102         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3103         if (sanity_check_area_boundary(sbi, bh))
3104                 return -EFSCORRUPTED;
3105
3106         return 0;
3107 }
3108
3109 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3110 {
3111         unsigned int total, fsmeta;
3112         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3113         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3114         unsigned int ovp_segments, reserved_segments;
3115         unsigned int main_segs, blocks_per_seg;
3116         unsigned int sit_segs, nat_segs;
3117         unsigned int sit_bitmap_size, nat_bitmap_size;
3118         unsigned int log_blocks_per_seg;
3119         unsigned int segment_count_main;
3120         unsigned int cp_pack_start_sum, cp_payload;
3121         block_t user_block_count, valid_user_blocks;
3122         block_t avail_node_count, valid_node_count;
3123         int i, j;
3124
3125         total = le32_to_cpu(raw_super->segment_count);
3126         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3127         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3128         fsmeta += sit_segs;
3129         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3130         fsmeta += nat_segs;
3131         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3132         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3133
3134         if (unlikely(fsmeta >= total))
3135                 return 1;
3136
3137         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3138         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3139
3140         if (unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3141                         ovp_segments == 0 || reserved_segments == 0)) {
3142                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3143                 return 1;
3144         }
3145
3146         user_block_count = le64_to_cpu(ckpt->user_block_count);
3147         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3148         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3149         if (!user_block_count || user_block_count >=
3150                         segment_count_main << log_blocks_per_seg) {
3151                 f2fs_err(sbi, "Wrong user_block_count: %u",
3152                          user_block_count);
3153                 return 1;
3154         }
3155
3156         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3157         if (valid_user_blocks > user_block_count) {
3158                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3159                          valid_user_blocks, user_block_count);
3160                 return 1;
3161         }
3162
3163         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3164         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3165         if (valid_node_count > avail_node_count) {
3166                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3167                          valid_node_count, avail_node_count);
3168                 return 1;
3169         }
3170
3171         main_segs = le32_to_cpu(raw_super->segment_count_main);
3172         blocks_per_seg = sbi->blocks_per_seg;
3173
3174         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3175                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3176                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3177                         return 1;
3178                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3179                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3180                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3181                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3182                                          i, j,
3183                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3184                                 return 1;
3185                         }
3186                 }
3187         }
3188         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3189                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3190                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3191                         return 1;
3192                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3193                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3194                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3195                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3196                                          i, j,
3197                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3198                                 return 1;
3199                         }
3200                 }
3201         }
3202         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3203                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3204                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3205                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3206                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3207                                          i, j,
3208                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3209                                 return 1;
3210                         }
3211                 }
3212         }
3213
3214         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3215         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3216
3217         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3218                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3219                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3220                          sit_bitmap_size, nat_bitmap_size);
3221                 return 1;
3222         }
3223
3224         cp_pack_start_sum = __start_sum_addr(sbi);
3225         cp_payload = __cp_payload(sbi);
3226         if (cp_pack_start_sum < cp_payload + 1 ||
3227                 cp_pack_start_sum > blocks_per_seg - 1 -
3228                         NR_CURSEG_PERSIST_TYPE) {
3229                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3230                          cp_pack_start_sum);
3231                 return 1;
3232         }
3233
3234         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3235                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3236                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3237                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3238                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3239                           le32_to_cpu(ckpt->checksum_offset));
3240                 return 1;
3241         }
3242
3243         if (unlikely(f2fs_cp_error(sbi))) {
3244                 f2fs_err(sbi, "A bug case: need to run fsck");
3245                 return 1;
3246         }
3247         return 0;
3248 }
3249
3250 static void init_sb_info(struct f2fs_sb_info *sbi)
3251 {
3252         struct f2fs_super_block *raw_super = sbi->raw_super;
3253         int i;
3254
3255         sbi->log_sectors_per_block =
3256                 le32_to_cpu(raw_super->log_sectors_per_block);
3257         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3258         sbi->blocksize = 1 << sbi->log_blocksize;
3259         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3260         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3261         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3262         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3263         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3264         sbi->total_node_count =
3265                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3266                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3267         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3268         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3269         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3270         sbi->cur_victim_sec = NULL_SECNO;
3271         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3272         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3273         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3274         sbi->migration_granularity = sbi->segs_per_sec;
3275
3276         sbi->dir_level = DEF_DIR_LEVEL;
3277         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3278         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3279         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3280         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3281         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3282         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3283                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3284         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3285
3286         for (i = 0; i < NR_COUNT_TYPE; i++)
3287                 atomic_set(&sbi->nr_pages[i], 0);
3288
3289         for (i = 0; i < META; i++)
3290                 atomic_set(&sbi->wb_sync_req[i], 0);
3291
3292         INIT_LIST_HEAD(&sbi->s_list);
3293         mutex_init(&sbi->umount_mutex);
3294         init_rwsem(&sbi->io_order_lock);
3295         spin_lock_init(&sbi->cp_lock);
3296
3297         sbi->dirty_device = 0;
3298         spin_lock_init(&sbi->dev_lock);
3299
3300         init_rwsem(&sbi->sb_lock);
3301         init_rwsem(&sbi->pin_sem);
3302 }
3303
3304 static int init_percpu_info(struct f2fs_sb_info *sbi)
3305 {
3306         int err;
3307
3308         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3309         if (err)
3310                 return err;
3311
3312         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3313                                                                 GFP_KERNEL);
3314         if (err)
3315                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3316
3317         return err;
3318 }
3319
3320 #ifdef CONFIG_BLK_DEV_ZONED
3321
3322 struct f2fs_report_zones_args {
3323         struct f2fs_dev_info *dev;
3324         bool zone_cap_mismatch;
3325 };
3326
3327 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3328                               void *data)
3329 {
3330         struct f2fs_report_zones_args *rz_args = data;
3331
3332         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3333                 return 0;
3334
3335         set_bit(idx, rz_args->dev->blkz_seq);
3336         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3337                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3338         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3339                 rz_args->zone_cap_mismatch = true;
3340
3341         return 0;
3342 }
3343
3344 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3345 {
3346         struct block_device *bdev = FDEV(devi).bdev;
3347         sector_t nr_sectors = bdev_nr_sectors(bdev);
3348         struct f2fs_report_zones_args rep_zone_arg;
3349         int ret;
3350
3351         if (!f2fs_sb_has_blkzoned(sbi))
3352                 return 0;
3353
3354         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3355                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3356                 return -EINVAL;
3357         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3358         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3359                                 __ilog2_u32(sbi->blocks_per_blkz))
3360                 return -EINVAL;
3361         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3362         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3363                                         sbi->log_blocks_per_blkz;
3364         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3365                 FDEV(devi).nr_blkz++;
3366
3367         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3368                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3369                                         * sizeof(unsigned long),
3370                                         GFP_KERNEL);
3371         if (!FDEV(devi).blkz_seq)
3372                 return -ENOMEM;
3373
3374         /* Get block zones type and zone-capacity */
3375         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3376                                         FDEV(devi).nr_blkz * sizeof(block_t),
3377                                         GFP_KERNEL);
3378         if (!FDEV(devi).zone_capacity_blocks)
3379                 return -ENOMEM;
3380
3381         rep_zone_arg.dev = &FDEV(devi);
3382         rep_zone_arg.zone_cap_mismatch = false;
3383
3384         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3385                                   &rep_zone_arg);
3386         if (ret < 0)
3387                 return ret;
3388
3389         if (!rep_zone_arg.zone_cap_mismatch) {
3390                 kfree(FDEV(devi).zone_capacity_blocks);
3391                 FDEV(devi).zone_capacity_blocks = NULL;
3392         }
3393
3394         return 0;
3395 }
3396 #endif
3397
3398 /*
3399  * Read f2fs raw super block.
3400  * Because we have two copies of super block, so read both of them
3401  * to get the first valid one. If any one of them is broken, we pass
3402  * them recovery flag back to the caller.
3403  */
3404 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3405                         struct f2fs_super_block **raw_super,
3406                         int *valid_super_block, int *recovery)
3407 {
3408         struct super_block *sb = sbi->sb;
3409         int block;
3410         struct buffer_head *bh;
3411         struct f2fs_super_block *super;
3412         int err = 0;
3413
3414         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3415         if (!super)
3416                 return -ENOMEM;
3417
3418         for (block = 0; block < 2; block++) {
3419                 bh = sb_bread(sb, block);
3420                 if (!bh) {
3421                         f2fs_err(sbi, "Unable to read %dth superblock",
3422                                  block + 1);
3423                         err = -EIO;
3424                         *recovery = 1;
3425                         continue;
3426                 }
3427
3428                 /* sanity checking of raw super */
3429                 err = sanity_check_raw_super(sbi, bh);
3430                 if (err) {
3431                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3432                                  block + 1);
3433                         brelse(bh);
3434                         *recovery = 1;
3435                         continue;
3436                 }
3437
3438                 if (!*raw_super) {
3439                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3440                                                         sizeof(*super));
3441                         *valid_super_block = block;
3442                         *raw_super = super;
3443                 }
3444                 brelse(bh);
3445         }
3446
3447         /* No valid superblock */
3448         if (!*raw_super)
3449                 kfree(super);
3450         else
3451                 err = 0;
3452
3453         return err;
3454 }
3455
3456 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3457 {
3458         struct buffer_head *bh;
3459         __u32 crc = 0;
3460         int err;
3461
3462         if ((recover && f2fs_readonly(sbi->sb)) ||
3463                                 bdev_read_only(sbi->sb->s_bdev)) {
3464                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3465                 return -EROFS;
3466         }
3467
3468         /* we should update superblock crc here */
3469         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3470                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3471                                 offsetof(struct f2fs_super_block, crc));
3472                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3473         }
3474
3475         /* write back-up superblock first */
3476         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3477         if (!bh)
3478                 return -EIO;
3479         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3480         brelse(bh);
3481
3482         /* if we are in recovery path, skip writing valid superblock */
3483         if (recover || err)
3484                 return err;
3485
3486         /* write current valid superblock */
3487         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3488         if (!bh)
3489                 return -EIO;
3490         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3491         brelse(bh);
3492         return err;
3493 }
3494
3495 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3496 {
3497         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3498         unsigned int max_devices = MAX_DEVICES;
3499         int i;
3500
3501         /* Initialize single device information */
3502         if (!RDEV(0).path[0]) {
3503                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3504                         return 0;
3505                 max_devices = 1;
3506         }
3507
3508         /*
3509          * Initialize multiple devices information, or single
3510          * zoned block device information.
3511          */
3512         sbi->devs = f2fs_kzalloc(sbi,
3513                                  array_size(max_devices,
3514                                             sizeof(struct f2fs_dev_info)),
3515                                  GFP_KERNEL);
3516         if (!sbi->devs)
3517                 return -ENOMEM;
3518
3519         for (i = 0; i < max_devices; i++) {
3520
3521                 if (i > 0 && !RDEV(i).path[0])
3522                         break;
3523
3524                 if (max_devices == 1) {
3525                         /* Single zoned block device mount */
3526                         FDEV(0).bdev =
3527                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3528                                         sbi->sb->s_mode, sbi->sb->s_type);
3529                 } else {
3530                         /* Multi-device mount */
3531                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3532                         FDEV(i).total_segments =
3533                                 le32_to_cpu(RDEV(i).total_segments);
3534                         if (i == 0) {
3535                                 FDEV(i).start_blk = 0;
3536                                 FDEV(i).end_blk = FDEV(i).start_blk +
3537                                     (FDEV(i).total_segments <<
3538                                     sbi->log_blocks_per_seg) - 1 +
3539                                     le32_to_cpu(raw_super->segment0_blkaddr);
3540                         } else {
3541                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3542                                 FDEV(i).end_blk = FDEV(i).start_blk +
3543                                         (FDEV(i).total_segments <<
3544                                         sbi->log_blocks_per_seg) - 1;
3545                         }
3546                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3547                                         sbi->sb->s_mode, sbi->sb->s_type);
3548                 }
3549                 if (IS_ERR(FDEV(i).bdev))
3550                         return PTR_ERR(FDEV(i).bdev);
3551
3552                 /* to release errored devices */
3553                 sbi->s_ndevs = i + 1;
3554
3555 #ifdef CONFIG_BLK_DEV_ZONED
3556                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3557                                 !f2fs_sb_has_blkzoned(sbi)) {
3558                         f2fs_err(sbi, "Zoned block device feature not enabled\n");
3559                         return -EINVAL;
3560                 }
3561                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3562                         if (init_blkz_info(sbi, i)) {
3563                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3564                                 return -EINVAL;
3565                         }
3566                         if (max_devices == 1)
3567                                 break;
3568                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3569                                   i, FDEV(i).path,
3570                                   FDEV(i).total_segments,
3571                                   FDEV(i).start_blk, FDEV(i).end_blk,
3572                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3573                                   "Host-aware" : "Host-managed");
3574                         continue;
3575                 }
3576 #endif
3577                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3578                           i, FDEV(i).path,
3579                           FDEV(i).total_segments,
3580                           FDEV(i).start_blk, FDEV(i).end_blk);
3581         }
3582         f2fs_info(sbi,
3583                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3584         return 0;
3585 }
3586
3587 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3588 {
3589 #ifdef CONFIG_UNICODE
3590         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3591                 const struct f2fs_sb_encodings *encoding_info;
3592                 struct unicode_map *encoding;
3593                 __u16 encoding_flags;
3594
3595                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3596                                           &encoding_flags)) {
3597                         f2fs_err(sbi,
3598                                  "Encoding requested by superblock is unknown");
3599                         return -EINVAL;
3600                 }
3601
3602                 encoding = utf8_load(encoding_info->version);
3603                 if (IS_ERR(encoding)) {
3604                         f2fs_err(sbi,
3605                                  "can't mount with superblock charset: %s-%s "
3606                                  "not supported by the kernel. flags: 0x%x.",
3607                                  encoding_info->name, encoding_info->version,
3608                                  encoding_flags);
3609                         return PTR_ERR(encoding);
3610                 }
3611                 f2fs_info(sbi, "Using encoding defined by superblock: "
3612                          "%s-%s with flags 0x%hx", encoding_info->name,
3613                          encoding_info->version?:"\b", encoding_flags);
3614
3615                 sbi->sb->s_encoding = encoding;
3616                 sbi->sb->s_encoding_flags = encoding_flags;
3617         }
3618 #else
3619         if (f2fs_sb_has_casefold(sbi)) {
3620                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3621                 return -EINVAL;
3622         }
3623 #endif
3624         return 0;
3625 }
3626
3627 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3628 {
3629         struct f2fs_sm_info *sm_i = SM_I(sbi);
3630
3631         /* adjust parameters according to the volume size */
3632         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3633                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3634                 sm_i->dcc_info->discard_granularity = 1;
3635                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3636         }
3637
3638         sbi->readdir_ra = 1;
3639 }
3640
3641 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3642 {
3643         struct f2fs_sb_info *sbi;
3644         struct f2fs_super_block *raw_super;
3645         struct inode *root;
3646         int err;
3647         bool skip_recovery = false, need_fsck = false;
3648         char *options = NULL;
3649         int recovery, i, valid_super_block;
3650         struct curseg_info *seg_i;
3651         int retry_cnt = 1;
3652
3653 try_onemore:
3654         err = -EINVAL;
3655         raw_super = NULL;
3656         valid_super_block = -1;
3657         recovery = 0;
3658
3659         /* allocate memory for f2fs-specific super block info */
3660         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3661         if (!sbi)
3662                 return -ENOMEM;
3663
3664         sbi->sb = sb;
3665
3666         /* Load the checksum driver */
3667         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3668         if (IS_ERR(sbi->s_chksum_driver)) {
3669                 f2fs_err(sbi, "Cannot load crc32 driver.");
3670                 err = PTR_ERR(sbi->s_chksum_driver);
3671                 sbi->s_chksum_driver = NULL;
3672                 goto free_sbi;
3673         }
3674
3675         /* set a block size */
3676         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3677                 f2fs_err(sbi, "unable to set blocksize");
3678                 goto free_sbi;
3679         }
3680
3681         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3682                                                                 &recovery);
3683         if (err)
3684                 goto free_sbi;
3685
3686         sb->s_fs_info = sbi;
3687         sbi->raw_super = raw_super;
3688
3689         /* precompute checksum seed for metadata */
3690         if (f2fs_sb_has_inode_chksum(sbi))
3691                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3692                                                 sizeof(raw_super->uuid));
3693
3694         default_options(sbi);
3695         /* parse mount options */
3696         options = kstrdup((const char *)data, GFP_KERNEL);
3697         if (data && !options) {
3698                 err = -ENOMEM;
3699                 goto free_sb_buf;
3700         }
3701
3702         err = parse_options(sb, options, false);
3703         if (err)
3704                 goto free_options;
3705
3706         sb->s_maxbytes = max_file_blocks(NULL) <<
3707                                 le32_to_cpu(raw_super->log_blocksize);
3708         sb->s_max_links = F2FS_LINK_MAX;
3709
3710         err = f2fs_setup_casefold(sbi);
3711         if (err)
3712                 goto free_options;
3713
3714 #ifdef CONFIG_QUOTA
3715         sb->dq_op = &f2fs_quota_operations;
3716         sb->s_qcop = &f2fs_quotactl_ops;
3717         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3718
3719         if (f2fs_sb_has_quota_ino(sbi)) {
3720                 for (i = 0; i < MAXQUOTAS; i++) {
3721                         if (f2fs_qf_ino(sbi->sb, i))
3722                                 sbi->nquota_files++;
3723                 }
3724         }
3725 #endif
3726
3727         sb->s_op = &f2fs_sops;
3728 #ifdef CONFIG_FS_ENCRYPTION
3729         sb->s_cop = &f2fs_cryptops;
3730 #endif
3731 #ifdef CONFIG_FS_VERITY
3732         sb->s_vop = &f2fs_verityops;
3733 #endif
3734         sb->s_xattr = f2fs_xattr_handlers;
3735         sb->s_export_op = &f2fs_export_ops;
3736         sb->s_magic = F2FS_SUPER_MAGIC;
3737         sb->s_time_gran = 1;
3738         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3739                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3740         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3741         sb->s_iflags |= SB_I_CGROUPWB;
3742
3743         /* init f2fs-specific super block info */
3744         sbi->valid_super_block = valid_super_block;
3745         init_rwsem(&sbi->gc_lock);
3746         mutex_init(&sbi->writepages);
3747         init_rwsem(&sbi->cp_global_sem);
3748         init_rwsem(&sbi->node_write);
3749         init_rwsem(&sbi->node_change);
3750
3751         /* disallow all the data/node/meta page writes */
3752         set_sbi_flag(sbi, SBI_POR_DOING);
3753         spin_lock_init(&sbi->stat_lock);
3754
3755         /* init iostat info */
3756         spin_lock_init(&sbi->iostat_lock);
3757         sbi->iostat_enable = false;
3758         sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS;
3759
3760         for (i = 0; i < NR_PAGE_TYPE; i++) {
3761                 int n = (i == META) ? 1 : NR_TEMP_TYPE;
3762                 int j;
3763
3764                 sbi->write_io[i] =
3765                         f2fs_kmalloc(sbi,
3766                                      array_size(n,
3767                                                 sizeof(struct f2fs_bio_info)),
3768                                      GFP_KERNEL);
3769                 if (!sbi->write_io[i]) {
3770                         err = -ENOMEM;
3771                         goto free_bio_info;
3772                 }
3773
3774                 for (j = HOT; j < n; j++) {
3775                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
3776                         sbi->write_io[i][j].sbi = sbi;
3777                         sbi->write_io[i][j].bio = NULL;
3778                         spin_lock_init(&sbi->write_io[i][j].io_lock);
3779                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3780                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3781                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3782                 }
3783         }
3784
3785         init_rwsem(&sbi->cp_rwsem);
3786         init_rwsem(&sbi->quota_sem);
3787         init_waitqueue_head(&sbi->cp_wait);
3788         init_sb_info(sbi);
3789
3790         err = init_percpu_info(sbi);
3791         if (err)
3792                 goto free_bio_info;
3793
3794         if (F2FS_IO_ALIGNED(sbi)) {
3795                 sbi->write_io_dummy =
3796                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3797                 if (!sbi->write_io_dummy) {
3798                         err = -ENOMEM;
3799                         goto free_percpu;
3800                 }
3801         }
3802
3803         /* init per sbi slab cache */
3804         err = f2fs_init_xattr_caches(sbi);
3805         if (err)
3806                 goto free_io_dummy;
3807         err = f2fs_init_page_array_cache(sbi);
3808         if (err)
3809                 goto free_xattr_cache;
3810
3811         /* get an inode for meta space */
3812         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3813         if (IS_ERR(sbi->meta_inode)) {
3814                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3815                 err = PTR_ERR(sbi->meta_inode);
3816                 goto free_page_array_cache;
3817         }
3818
3819         err = f2fs_get_valid_checkpoint(sbi);
3820         if (err) {
3821                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3822                 goto free_meta_inode;
3823         }
3824
3825         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3826                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3827         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3828                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3829                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3830         }
3831
3832         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3833                 set_sbi_flag(sbi, SBI_NEED_FSCK);
3834
3835         /* Initialize device list */
3836         err = f2fs_scan_devices(sbi);
3837         if (err) {
3838                 f2fs_err(sbi, "Failed to find devices");
3839                 goto free_devices;
3840         }
3841
3842         err = f2fs_init_post_read_wq(sbi);
3843         if (err) {
3844                 f2fs_err(sbi, "Failed to initialize post read workqueue");
3845                 goto free_devices;
3846         }
3847
3848         sbi->total_valid_node_count =
3849                                 le32_to_cpu(sbi->ckpt->valid_node_count);
3850         percpu_counter_set(&sbi->total_valid_inode_count,
3851                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
3852         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3853         sbi->total_valid_block_count =
3854                                 le64_to_cpu(sbi->ckpt->valid_block_count);
3855         sbi->last_valid_block_count = sbi->total_valid_block_count;
3856         sbi->reserved_blocks = 0;
3857         sbi->current_reserved_blocks = 0;
3858         limit_reserve_root(sbi);
3859         adjust_unusable_cap_perc(sbi);
3860
3861         for (i = 0; i < NR_INODE_TYPE; i++) {
3862                 INIT_LIST_HEAD(&sbi->inode_list[i]);
3863                 spin_lock_init(&sbi->inode_lock[i]);
3864         }
3865         mutex_init(&sbi->flush_lock);
3866
3867         f2fs_init_extent_cache_info(sbi);
3868
3869         f2fs_init_ino_entry_info(sbi);
3870
3871         f2fs_init_fsync_node_info(sbi);
3872
3873         /* setup checkpoint request control and start checkpoint issue thread */
3874         f2fs_init_ckpt_req_control(sbi);
3875         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
3876                         test_opt(sbi, MERGE_CHECKPOINT)) {
3877                 err = f2fs_start_ckpt_thread(sbi);
3878                 if (err) {
3879                         f2fs_err(sbi,
3880                             "Failed to start F2FS issue_checkpoint_thread (%d)",
3881                             err);
3882                         goto stop_ckpt_thread;
3883                 }
3884         }
3885
3886         /* setup f2fs internal modules */
3887         err = f2fs_build_segment_manager(sbi);
3888         if (err) {
3889                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
3890                          err);
3891                 goto free_sm;
3892         }
3893         err = f2fs_build_node_manager(sbi);
3894         if (err) {
3895                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
3896                          err);
3897                 goto free_nm;
3898         }
3899
3900         /* For write statistics */
3901         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
3902
3903         /* Read accumulated write IO statistics if exists */
3904         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3905         if (__exist_node_summaries(sbi))
3906                 sbi->kbytes_written =
3907                         le64_to_cpu(seg_i->journal->info.kbytes_written);
3908
3909         f2fs_build_gc_manager(sbi);
3910
3911         err = f2fs_build_stats(sbi);
3912         if (err)
3913                 goto free_nm;
3914
3915         /* get an inode for node space */
3916         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3917         if (IS_ERR(sbi->node_inode)) {
3918                 f2fs_err(sbi, "Failed to read node inode");
3919                 err = PTR_ERR(sbi->node_inode);
3920                 goto free_stats;
3921         }
3922
3923         /* read root inode and dentry */
3924         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3925         if (IS_ERR(root)) {
3926                 f2fs_err(sbi, "Failed to read root inode");
3927                 err = PTR_ERR(root);
3928                 goto free_node_inode;
3929         }
3930         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3931                         !root->i_size || !root->i_nlink) {
3932                 iput(root);
3933                 err = -EINVAL;
3934                 goto free_node_inode;
3935         }
3936
3937         sb->s_root = d_make_root(root); /* allocate root dentry */
3938         if (!sb->s_root) {
3939                 err = -ENOMEM;
3940                 goto free_node_inode;
3941         }
3942
3943         err = f2fs_register_sysfs(sbi);
3944         if (err)
3945                 goto free_root_inode;
3946
3947 #ifdef CONFIG_QUOTA
3948         /* Enable quota usage during mount */
3949         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3950                 err = f2fs_enable_quotas(sb);
3951                 if (err)
3952                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
3953         }
3954 #endif
3955         /* if there are any orphan inodes, free them */
3956         err = f2fs_recover_orphan_inodes(sbi);
3957         if (err)
3958                 goto free_meta;
3959
3960         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3961                 goto reset_checkpoint;
3962
3963         /* recover fsynced data */
3964         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
3965                         !test_opt(sbi, NORECOVERY)) {
3966                 /*
3967                  * mount should be failed, when device has readonly mode, and
3968                  * previous checkpoint was not done by clean system shutdown.
3969                  */
3970                 if (f2fs_hw_is_readonly(sbi)) {
3971                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3972                                 err = f2fs_recover_fsync_data(sbi, true);
3973                                 if (err > 0) {
3974                                         err = -EROFS;
3975                                         f2fs_err(sbi, "Need to recover fsync data, but "
3976                                                 "write access unavailable, please try "
3977                                                 "mount w/ disable_roll_forward or norecovery");
3978                                 }
3979                                 if (err < 0)
3980                                         goto free_meta;
3981                         }
3982                         f2fs_info(sbi, "write access unavailable, skipping recovery");
3983                         goto reset_checkpoint;
3984                 }
3985
3986                 if (need_fsck)
3987                         set_sbi_flag(sbi, SBI_NEED_FSCK);
3988
3989                 if (skip_recovery)
3990                         goto reset_checkpoint;
3991
3992                 err = f2fs_recover_fsync_data(sbi, false);
3993                 if (err < 0) {
3994                         if (err != -ENOMEM)
3995                                 skip_recovery = true;
3996                         need_fsck = true;
3997                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
3998                                  err);
3999                         goto free_meta;
4000                 }
4001         } else {
4002                 err = f2fs_recover_fsync_data(sbi, true);
4003
4004                 if (!f2fs_readonly(sb) && err > 0) {
4005                         err = -EINVAL;
4006                         f2fs_err(sbi, "Need to recover fsync data");
4007                         goto free_meta;
4008                 }
4009         }
4010
4011         /*
4012          * If the f2fs is not readonly and fsync data recovery succeeds,
4013          * check zoned block devices' write pointer consistency.
4014          */
4015         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4016                 err = f2fs_check_write_pointer(sbi);
4017                 if (err)
4018                         goto free_meta;
4019         }
4020
4021 reset_checkpoint:
4022         f2fs_init_inmem_curseg(sbi);
4023
4024         /* f2fs_recover_fsync_data() cleared this already */
4025         clear_sbi_flag(sbi, SBI_POR_DOING);
4026
4027         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4028                 err = f2fs_disable_checkpoint(sbi);
4029                 if (err)
4030                         goto sync_free_meta;
4031         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4032                 f2fs_enable_checkpoint(sbi);
4033         }
4034
4035         /*
4036          * If filesystem is not mounted as read-only then
4037          * do start the gc_thread.
4038          */
4039         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4040                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4041                 /* After POR, we can run background GC thread.*/
4042                 err = f2fs_start_gc_thread(sbi);
4043                 if (err)
4044                         goto sync_free_meta;
4045         }
4046         kvfree(options);
4047
4048         /* recover broken superblock */
4049         if (recovery) {
4050                 err = f2fs_commit_super(sbi, true);
4051                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4052                           sbi->valid_super_block ? 1 : 2, err);
4053         }
4054
4055         f2fs_join_shrinker(sbi);
4056
4057         f2fs_tuning_parameters(sbi);
4058
4059         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4060                     cur_cp_version(F2FS_CKPT(sbi)));
4061         f2fs_update_time(sbi, CP_TIME);
4062         f2fs_update_time(sbi, REQ_TIME);
4063         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4064         return 0;
4065
4066 sync_free_meta:
4067         /* safe to flush all the data */
4068         sync_filesystem(sbi->sb);
4069         retry_cnt = 0;
4070
4071 free_meta:
4072 #ifdef CONFIG_QUOTA
4073         f2fs_truncate_quota_inode_pages(sb);
4074         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4075                 f2fs_quota_off_umount(sbi->sb);
4076 #endif
4077         /*
4078          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4079          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4080          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4081          * falls into an infinite loop in f2fs_sync_meta_pages().
4082          */
4083         truncate_inode_pages_final(META_MAPPING(sbi));
4084         /* evict some inodes being cached by GC */
4085         evict_inodes(sb);
4086         f2fs_unregister_sysfs(sbi);
4087 free_root_inode:
4088         dput(sb->s_root);
4089         sb->s_root = NULL;
4090 free_node_inode:
4091         f2fs_release_ino_entry(sbi, true);
4092         truncate_inode_pages_final(NODE_MAPPING(sbi));
4093         iput(sbi->node_inode);
4094         sbi->node_inode = NULL;
4095 free_stats:
4096         f2fs_destroy_stats(sbi);
4097 free_nm:
4098         f2fs_destroy_node_manager(sbi);
4099 free_sm:
4100         f2fs_destroy_segment_manager(sbi);
4101         f2fs_destroy_post_read_wq(sbi);
4102 stop_ckpt_thread:
4103         f2fs_stop_ckpt_thread(sbi);
4104 free_devices:
4105         destroy_device_list(sbi);
4106         kvfree(sbi->ckpt);
4107 free_meta_inode:
4108         make_bad_inode(sbi->meta_inode);
4109         iput(sbi->meta_inode);
4110         sbi->meta_inode = NULL;
4111 free_page_array_cache:
4112         f2fs_destroy_page_array_cache(sbi);
4113 free_xattr_cache:
4114         f2fs_destroy_xattr_caches(sbi);
4115 free_io_dummy:
4116         mempool_destroy(sbi->write_io_dummy);
4117 free_percpu:
4118         destroy_percpu_info(sbi);
4119 free_bio_info:
4120         for (i = 0; i < NR_PAGE_TYPE; i++)
4121                 kvfree(sbi->write_io[i]);
4122
4123 #ifdef CONFIG_UNICODE
4124         utf8_unload(sb->s_encoding);
4125         sb->s_encoding = NULL;
4126 #endif
4127 free_options:
4128 #ifdef CONFIG_QUOTA
4129         for (i = 0; i < MAXQUOTAS; i++)
4130                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4131 #endif
4132         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4133         kvfree(options);
4134 free_sb_buf:
4135         kfree(raw_super);
4136 free_sbi:
4137         if (sbi->s_chksum_driver)
4138                 crypto_free_shash(sbi->s_chksum_driver);
4139         kfree(sbi);
4140
4141         /* give only one another chance */
4142         if (retry_cnt > 0 && skip_recovery) {
4143                 retry_cnt--;
4144                 shrink_dcache_sb(sb);
4145                 goto try_onemore;
4146         }
4147         return err;
4148 }
4149
4150 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4151                         const char *dev_name, void *data)
4152 {
4153         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4154 }
4155
4156 static void kill_f2fs_super(struct super_block *sb)
4157 {
4158         if (sb->s_root) {
4159                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4160
4161                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4162                 f2fs_stop_gc_thread(sbi);
4163                 f2fs_stop_discard_thread(sbi);
4164
4165                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4166                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4167                         struct cp_control cpc = {
4168                                 .reason = CP_UMOUNT,
4169                         };
4170                         f2fs_write_checkpoint(sbi, &cpc);
4171                 }
4172
4173                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4174                         sb->s_flags &= ~SB_RDONLY;
4175         }
4176         kill_block_super(sb);
4177 }
4178
4179 static struct file_system_type f2fs_fs_type = {
4180         .owner          = THIS_MODULE,
4181         .name           = "f2fs",
4182         .mount          = f2fs_mount,
4183         .kill_sb        = kill_f2fs_super,
4184         .fs_flags       = FS_REQUIRES_DEV,
4185 };
4186 MODULE_ALIAS_FS("f2fs");
4187
4188 static int __init init_inodecache(void)
4189 {
4190         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4191                         sizeof(struct f2fs_inode_info), 0,
4192                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4193         if (!f2fs_inode_cachep)
4194                 return -ENOMEM;
4195         return 0;
4196 }
4197
4198 static void destroy_inodecache(void)
4199 {
4200         /*
4201          * Make sure all delayed rcu free inodes are flushed before we
4202          * destroy cache.
4203          */
4204         rcu_barrier();
4205         kmem_cache_destroy(f2fs_inode_cachep);
4206 }
4207
4208 static int __init init_f2fs_fs(void)
4209 {
4210         int err;
4211
4212         if (PAGE_SIZE != F2FS_BLKSIZE) {
4213                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4214                                 PAGE_SIZE, F2FS_BLKSIZE);
4215                 return -EINVAL;
4216         }
4217
4218         err = init_inodecache();
4219         if (err)
4220                 goto fail;
4221         err = f2fs_create_node_manager_caches();
4222         if (err)
4223                 goto free_inodecache;
4224         err = f2fs_create_segment_manager_caches();
4225         if (err)
4226                 goto free_node_manager_caches;
4227         err = f2fs_create_checkpoint_caches();
4228         if (err)
4229                 goto free_segment_manager_caches;
4230         err = f2fs_create_extent_cache();
4231         if (err)
4232                 goto free_checkpoint_caches;
4233         err = f2fs_create_garbage_collection_cache();
4234         if (err)
4235                 goto free_extent_cache;
4236         err = f2fs_init_sysfs();
4237         if (err)
4238                 goto free_garbage_collection_cache;
4239         err = register_shrinker(&f2fs_shrinker_info);
4240         if (err)
4241                 goto free_sysfs;
4242         err = register_filesystem(&f2fs_fs_type);
4243         if (err)
4244                 goto free_shrinker;
4245         f2fs_create_root_stats();
4246         err = f2fs_init_post_read_processing();
4247         if (err)
4248                 goto free_root_stats;
4249         err = f2fs_init_bio_entry_cache();
4250         if (err)
4251                 goto free_post_read;
4252         err = f2fs_init_bioset();
4253         if (err)
4254                 goto free_bio_enrty_cache;
4255         err = f2fs_init_compress_mempool();
4256         if (err)
4257                 goto free_bioset;
4258         err = f2fs_init_compress_cache();
4259         if (err)
4260                 goto free_compress_mempool;
4261         return 0;
4262 free_compress_mempool:
4263         f2fs_destroy_compress_mempool();
4264 free_bioset:
4265         f2fs_destroy_bioset();
4266 free_bio_enrty_cache:
4267         f2fs_destroy_bio_entry_cache();
4268 free_post_read:
4269         f2fs_destroy_post_read_processing();
4270 free_root_stats:
4271         f2fs_destroy_root_stats();
4272         unregister_filesystem(&f2fs_fs_type);
4273 free_shrinker:
4274         unregister_shrinker(&f2fs_shrinker_info);
4275 free_sysfs:
4276         f2fs_exit_sysfs();
4277 free_garbage_collection_cache:
4278         f2fs_destroy_garbage_collection_cache();
4279 free_extent_cache:
4280         f2fs_destroy_extent_cache();
4281 free_checkpoint_caches:
4282         f2fs_destroy_checkpoint_caches();
4283 free_segment_manager_caches:
4284         f2fs_destroy_segment_manager_caches();
4285 free_node_manager_caches:
4286         f2fs_destroy_node_manager_caches();
4287 free_inodecache:
4288         destroy_inodecache();
4289 fail:
4290         return err;
4291 }
4292
4293 static void __exit exit_f2fs_fs(void)
4294 {
4295         f2fs_destroy_compress_cache();
4296         f2fs_destroy_compress_mempool();
4297         f2fs_destroy_bioset();
4298         f2fs_destroy_bio_entry_cache();
4299         f2fs_destroy_post_read_processing();
4300         f2fs_destroy_root_stats();
4301         unregister_filesystem(&f2fs_fs_type);
4302         unregister_shrinker(&f2fs_shrinker_info);
4303         f2fs_exit_sysfs();
4304         f2fs_destroy_garbage_collection_cache();
4305         f2fs_destroy_extent_cache();
4306         f2fs_destroy_checkpoint_caches();
4307         f2fs_destroy_segment_manager_caches();
4308         f2fs_destroy_node_manager_caches();
4309         destroy_inodecache();
4310 }
4311
4312 module_init(init_f2fs_fs)
4313 module_exit(exit_f2fs_fs)
4314
4315 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4316 MODULE_DESCRIPTION("Flash Friendly File System");
4317 MODULE_LICENSE("GPL");
4318