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/fs_context.h>
  12 #include <linux/sched/mm.h>
  13 #include <linux/statfs.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/kthread.h>
  16 #include <linux/parser.h>
  17 #include <linux/mount.h>
  18 #include <linux/seq_file.h>
  19 #include <linux/proc_fs.h>
  20 #include <linux/random.h>
  21 #include <linux/exportfs.h>
  22 #include <linux/blkdev.h>
  23 #include <linux/quotaops.h>
  24 #include <linux/f2fs_fs.h>
  25 #include <linux/sysfs.h>
  26 #include <linux/quota.h>
  27 #include <linux/unicode.h>
  28 #include <linux/part_stat.h>
  29 #include <linux/zstd.h>
  30 #include <linux/lz4.h>
  31
  32 #include "f2fs.h"
  33 #include "node.h"
  34 #include "segment.h"
  35 #include "xattr.h"
  36 #include "gc.h"
  37 #include "iostat.h"
  38
  39 #define CREATE_TRACE_POINTS
  40 #include <trace/events/f2fs.h>
  41
  42 static struct kmem_cache *f2fs_inode_cachep;
  43
  44 #ifdef CONFIG_F2FS_FAULT_INJECTION
  45
  46 const char *f2fs_fault_name[FAULT_MAX] = {
  47         [FAULT_KMALLOC]         = "kmalloc",
  48         [FAULT_KVMALLOC]        = "kvmalloc",
  49         [FAULT_PAGE_ALLOC]      = "page alloc",
  50         [FAULT_PAGE_GET]        = "page get",
  51         [FAULT_ALLOC_NID]       = "alloc nid",
  52         [FAULT_ORPHAN]          = "orphan",
  53         [FAULT_BLOCK]           = "no more block",
  54         [FAULT_DIR_DEPTH]       = "too big dir depth",
  55         [FAULT_EVICT_INODE]     = "evict_inode fail",
  56         [FAULT_TRUNCATE]        = "truncate fail",
  57         [FAULT_READ_IO]         = "read IO error",
  58         [FAULT_CHECKPOINT]      = "checkpoint error",
  59         [FAULT_DISCARD]         = "discard error",
  60         [FAULT_WRITE_IO]        = "write IO error",
  61         [FAULT_SLAB_ALLOC]      = "slab alloc",
  62         [FAULT_DQUOT_INIT]      = "dquot initialize",
  63         [FAULT_LOCK_OP]         = "lock_op",
  64         [FAULT_BLKADDR]         = "invalid blkaddr",
  65 };
  66
  67 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  68                                                         unsigned int type)
  69 {
  70         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  71
  72         if (rate) {
  73                 atomic_set(&ffi->inject_ops, 0);
  74                 ffi->inject_rate = rate;
  75         }
  76
  77         if (type)
  78                 ffi->inject_type = type;
  79
  80         if (!rate && !type)
  81                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  82 }
  83 #endif
  84
  85 /* f2fs-wide shrinker description */
  86 static struct shrinker f2fs_shrinker_info = {
  87         .scan_objects = f2fs_shrink_scan,
  88         .count_objects = f2fs_shrink_count,
  89         .seeks = DEFAULT_SEEKS,
  90 };
  91
  92 enum {
  93         Opt_gc_background,
  94         Opt_disable_roll_forward,
  95         Opt_norecovery,
  96         Opt_discard,
  97         Opt_nodiscard,
  98         Opt_noheap,
  99         Opt_heap,
 100         Opt_user_xattr,
 101         Opt_nouser_xattr,
 102         Opt_acl,
 103         Opt_noacl,
 104         Opt_active_logs,
 105         Opt_disable_ext_identify,
 106         Opt_inline_xattr,
 107         Opt_noinline_xattr,
 108         Opt_inline_xattr_size,
 109         Opt_inline_data,
 110         Opt_inline_dentry,
 111         Opt_noinline_dentry,
 112         Opt_flush_merge,
 113         Opt_noflush_merge,
 114         Opt_barrier,
 115         Opt_nobarrier,
 116         Opt_fastboot,
 117         Opt_extent_cache,
 118         Opt_noextent_cache,
 119         Opt_noinline_data,
 120         Opt_data_flush,
 121         Opt_reserve_root,
 122         Opt_resgid,
 123         Opt_resuid,
 124         Opt_mode,
 125         Opt_io_size_bits,
 126         Opt_fault_injection,
 127         Opt_fault_type,
 128         Opt_lazytime,
 129         Opt_nolazytime,
 130         Opt_quota,
 131         Opt_noquota,
 132         Opt_usrquota,
 133         Opt_grpquota,
 134         Opt_prjquota,
 135         Opt_usrjquota,
 136         Opt_grpjquota,
 137         Opt_prjjquota,
 138         Opt_offusrjquota,
 139         Opt_offgrpjquota,
 140         Opt_offprjjquota,
 141         Opt_jqfmt_vfsold,
 142         Opt_jqfmt_vfsv0,
 143         Opt_jqfmt_vfsv1,
 144         Opt_alloc,
 145         Opt_fsync,
 146         Opt_test_dummy_encryption,
 147         Opt_inlinecrypt,
 148         Opt_checkpoint_disable,
 149         Opt_checkpoint_disable_cap,
 150         Opt_checkpoint_disable_cap_perc,
 151         Opt_checkpoint_enable,
 152         Opt_checkpoint_merge,
 153         Opt_nocheckpoint_merge,
 154         Opt_compress_algorithm,
 155         Opt_compress_log_size,
 156         Opt_compress_extension,
 157         Opt_nocompress_extension,
 158         Opt_compress_chksum,
 159         Opt_compress_mode,
 160         Opt_compress_cache,
 161         Opt_atgc,
 162         Opt_gc_merge,
 163         Opt_nogc_merge,
 164         Opt_discard_unit,
 165         Opt_memory_mode,
 166         Opt_age_extent_cache,
 167         Opt_errors,
 168         Opt_err,
 169 };
 170
 171 static match_table_t f2fs_tokens = {
 172         {Opt_gc_background, "background_gc=%s"},
 173         {Opt_disable_roll_forward, "disable_roll_forward"},
 174         {Opt_norecovery, "norecovery"},
 175         {Opt_discard, "discard"},
 176         {Opt_nodiscard, "nodiscard"},
 177         {Opt_noheap, "no_heap"},
 178         {Opt_heap, "heap"},
 179         {Opt_user_xattr, "user_xattr"},
 180         {Opt_nouser_xattr, "nouser_xattr"},
 181         {Opt_acl, "acl"},
 182         {Opt_noacl, "noacl"},
 183         {Opt_active_logs, "active_logs=%u"},
 184         {Opt_disable_ext_identify, "disable_ext_identify"},
 185         {Opt_inline_xattr, "inline_xattr"},
 186         {Opt_noinline_xattr, "noinline_xattr"},
 187         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 188         {Opt_inline_data, "inline_data"},
 189         {Opt_inline_dentry, "inline_dentry"},
 190         {Opt_noinline_dentry, "noinline_dentry"},
 191         {Opt_flush_merge, "flush_merge"},
 192         {Opt_noflush_merge, "noflush_merge"},
 193         {Opt_barrier, "barrier"},
 194         {Opt_nobarrier, "nobarrier"},
 195         {Opt_fastboot, "fastboot"},
 196         {Opt_extent_cache, "extent_cache"},
 197         {Opt_noextent_cache, "noextent_cache"},
 198         {Opt_noinline_data, "noinline_data"},
 199         {Opt_data_flush, "data_flush"},
 200         {Opt_reserve_root, "reserve_root=%u"},
 201         {Opt_resgid, "resgid=%u"},
 202         {Opt_resuid, "resuid=%u"},
 203         {Opt_mode, "mode=%s"},
 204         {Opt_io_size_bits, "io_bits=%u"},
 205         {Opt_fault_injection, "fault_injection=%u"},
 206         {Opt_fault_type, "fault_type=%u"},
 207         {Opt_lazytime, "lazytime"},
 208         {Opt_nolazytime, "nolazytime"},
 209         {Opt_quota, "quota"},
 210         {Opt_noquota, "noquota"},
 211         {Opt_usrquota, "usrquota"},
 212         {Opt_grpquota, "grpquota"},
 213         {Opt_prjquota, "prjquota"},
 214         {Opt_usrjquota, "usrjquota=%s"},
 215         {Opt_grpjquota, "grpjquota=%s"},
 216         {Opt_prjjquota, "prjjquota=%s"},
 217         {Opt_offusrjquota, "usrjquota="},
 218         {Opt_offgrpjquota, "grpjquota="},
 219         {Opt_offprjjquota, "prjjquota="},
 220         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 221         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 222         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 223         {Opt_alloc, "alloc_mode=%s"},
 224         {Opt_fsync, "fsync_mode=%s"},
 225         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 226         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 227         {Opt_inlinecrypt, "inlinecrypt"},
 228         {Opt_checkpoint_disable, "checkpoint=disable"},
 229         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 230         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 231         {Opt_checkpoint_enable, "checkpoint=enable"},
 232         {Opt_checkpoint_merge, "checkpoint_merge"},
 233         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 234         {Opt_compress_algorithm, "compress_algorithm=%s"},
 235         {Opt_compress_log_size, "compress_log_size=%u"},
 236         {Opt_compress_extension, "compress_extension=%s"},
 237         {Opt_nocompress_extension, "nocompress_extension=%s"},
 238         {Opt_compress_chksum, "compress_chksum"},
 239         {Opt_compress_mode, "compress_mode=%s"},
 240         {Opt_compress_cache, "compress_cache"},
 241         {Opt_atgc, "atgc"},
 242         {Opt_gc_merge, "gc_merge"},
 243         {Opt_nogc_merge, "nogc_merge"},
 244         {Opt_discard_unit, "discard_unit=%s"},
 245         {Opt_memory_mode, "memory=%s"},
 246         {Opt_age_extent_cache, "age_extent_cache"},
 247         {Opt_errors, "errors=%s"},
 248         {Opt_err, NULL},
 249 };
 250
 251 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 252 {
 253         struct va_format vaf;
 254         va_list args;
 255         int level;
 256
 257         va_start(args, fmt);
 258
 259         level = printk_get_level(fmt);
 260         vaf.fmt = printk_skip_level(fmt);
 261         vaf.va = &args;
 262         printk("%c%cF2FS-fs (%s): %pV\n",
 263                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 264
 265         va_end(args);
 266 }
 267
 268 #if IS_ENABLED(CONFIG_UNICODE)
 269 static const struct f2fs_sb_encodings {
 270         __u16 magic;
 271         char *name;
 272         unsigned int version;
 273 } f2fs_sb_encoding_map[] = {
 274         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 275 };
 276
 277 static const struct f2fs_sb_encodings *
 278 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 279 {
 280         __u16 magic = le16_to_cpu(sb->s_encoding);
 281         int i;
 282
 283         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 284                 if (magic == f2fs_sb_encoding_map[i].magic)
 285                         return &f2fs_sb_encoding_map[i];
 286
 287         return NULL;
 288 }
 289
 290 struct kmem_cache *f2fs_cf_name_slab;
 291 static int __init f2fs_create_casefold_cache(void)
 292 {
 293         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 294                                                         F2FS_NAME_LEN);
 295         return f2fs_cf_name_slab ? 0 : -ENOMEM;
 296 }
 297
 298 static void f2fs_destroy_casefold_cache(void)
 299 {
 300         kmem_cache_destroy(f2fs_cf_name_slab);
 301 }
 302 #else
 303 static int __init f2fs_create_casefold_cache(void) { return 0; }
 304 static void f2fs_destroy_casefold_cache(void) { }
 305 #endif
 306
 307 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 308 {
 309         block_t limit = min((sbi->user_block_count >> 3),
 310                         sbi->user_block_count - sbi->reserved_blocks);
 311
 312         /* limit is 12.5% */
 313         if (test_opt(sbi, RESERVE_ROOT) &&
 314                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 315                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 316                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 317                           F2FS_OPTION(sbi).root_reserved_blocks);
 318         }
 319         if (!test_opt(sbi, RESERVE_ROOT) &&
 320                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 321                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 322                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 323                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 324                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 325                           from_kuid_munged(&init_user_ns,
 326                                            F2FS_OPTION(sbi).s_resuid),
 327                           from_kgid_munged(&init_user_ns,
 328                                            F2FS_OPTION(sbi).s_resgid));
 329 }
 330
 331 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 332 {
 333         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 334         unsigned int avg_vblocks;
 335         unsigned int wanted_reserved_segments;
 336         block_t avail_user_block_count;
 337
 338         if (!F2FS_IO_ALIGNED(sbi))
 339                 return 0;
 340
 341         /* average valid block count in section in worst case */
 342         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 343
 344         /*
 345          * we need enough free space when migrating one section in worst case
 346          */
 347         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 348                                                 reserved_segments(sbi);
 349         wanted_reserved_segments -= reserved_segments(sbi);
 350
 351         avail_user_block_count = sbi->user_block_count -
 352                                 sbi->current_reserved_blocks -
 353                                 F2FS_OPTION(sbi).root_reserved_blocks;
 354
 355         if (wanted_reserved_segments * sbi->blocks_per_seg >
 356                                         avail_user_block_count) {
 357                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 358                         wanted_reserved_segments,
 359                         avail_user_block_count >> sbi->log_blocks_per_seg);
 360                 return -ENOSPC;
 361         }
 362
 363         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 364
 365         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 366                          wanted_reserved_segments);
 367
 368         return 0;
 369 }
 370
 371 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 372 {
 373         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 374                 return;
 375
 376         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 377                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 378         else
 379                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 380                                         F2FS_OPTION(sbi).unusable_cap_perc;
 381
 382         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 383                         F2FS_OPTION(sbi).unusable_cap,
 384                         F2FS_OPTION(sbi).unusable_cap_perc);
 385 }
 386
 387 static void init_once(void *foo)
 388 {
 389         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 390
 391         inode_init_once(&fi->vfs_inode);
 392 }
 393
 394 #ifdef CONFIG_QUOTA
 395 static const char * const quotatypes[] = INITQFNAMES;
 396 #define QTYPE2NAME(t) (quotatypes[t])
 397 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 398                                                         substring_t *args)
 399 {
 400         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 401         char *qname;
 402         int ret = -EINVAL;
 403
 404         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 405                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 406                 return -EINVAL;
 407         }
 408         if (f2fs_sb_has_quota_ino(sbi)) {
 409                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 410                 return 0;
 411         }
 412
 413         qname = match_strdup(args);
 414         if (!qname) {
 415                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 416                 return -ENOMEM;
 417         }
 418         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 419                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 420                         ret = 0;
 421                 else
 422                         f2fs_err(sbi, "%s quota file already specified",
 423                                  QTYPE2NAME(qtype));
 424                 goto errout;
 425         }
 426         if (strchr(qname, '/')) {
 427                 f2fs_err(sbi, "quotafile must be on filesystem root");
 428                 goto errout;
 429         }
 430         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 431         set_opt(sbi, QUOTA);
 432         return 0;
 433 errout:
 434         kfree(qname);
 435         return ret;
 436 }
 437
 438 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 439 {
 440         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 441
 442         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 443                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 444                 return -EINVAL;
 445         }
 446         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 447         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 448         return 0;
 449 }
 450
 451 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 452 {
 453         /*
 454          * We do the test below only for project quotas. 'usrquota' and
 455          * 'grpquota' mount options are allowed even without quota feature
 456          * to support legacy quotas in quota files.
 457          */
 458         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 459                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 460                 return -1;
 461         }
 462         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 463                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 464                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 465                 if (test_opt(sbi, USRQUOTA) &&
 466                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 467                         clear_opt(sbi, USRQUOTA);
 468
 469                 if (test_opt(sbi, GRPQUOTA) &&
 470                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 471                         clear_opt(sbi, GRPQUOTA);
 472
 473                 if (test_opt(sbi, PRJQUOTA) &&
 474                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 475                         clear_opt(sbi, PRJQUOTA);
 476
 477                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 478                                 test_opt(sbi, PRJQUOTA)) {
 479                         f2fs_err(sbi, "old and new quota format mixing");
 480                         return -1;
 481                 }
 482
 483                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 484                         f2fs_err(sbi, "journaled quota format not specified");
 485                         return -1;
 486                 }
 487         }
 488
 489         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 490                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 491                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 492         }
 493         return 0;
 494 }
 495 #endif
 496
 497 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 498                                           const char *opt,
 499                                           const substring_t *arg,
 500                                           bool is_remount)
 501 {
 502         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 503         struct fs_parameter param = {
 504                 .type = fs_value_is_string,
 505                 .string = arg->from ? arg->from : "",
 506         };
 507         struct fscrypt_dummy_policy *policy =
 508                 &F2FS_OPTION(sbi).dummy_enc_policy;
 509         int err;
 510
 511         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 512                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 513                 return -EINVAL;
 514         }
 515
 516         if (!f2fs_sb_has_encrypt(sbi)) {
 517                 f2fs_err(sbi, "Encrypt feature is off");
 518                 return -EINVAL;
 519         }
 520
 521         /*
 522          * This mount option is just for testing, and it's not worthwhile to
 523          * implement the extra complexity (e.g. RCU protection) that would be
 524          * needed to allow it to be set or changed during remount.  We do allow
 525          * it to be specified during remount, but only if there is no change.
 526          */
 527         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 528                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 529                 return -EINVAL;
 530         }
 531
 532         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 533         if (err) {
 534                 if (err == -EEXIST)
 535                         f2fs_warn(sbi,
 536                                   "Can't change test_dummy_encryption on remount");
 537                 else if (err == -EINVAL)
 538                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 539                                   opt);
 540                 else
 541                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 542                                   opt, err);
 543                 return -EINVAL;
 544         }
 545         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 546         return 0;
 547 }
 548
 549 #ifdef CONFIG_F2FS_FS_COMPRESSION
 550 /*
 551  * 1. The same extension name cannot not appear in both compress and non-compress extension
 552  * at the same time.
 553  * 2. If the compress extension specifies all files, the types specified by the non-compress
 554  * extension will be treated as special cases and will not be compressed.
 555  * 3. Don't allow the non-compress extension specifies all files.
 556  */
 557 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 558 {
 559         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 560         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 561         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 562
 563         ext = F2FS_OPTION(sbi).extensions;
 564         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 565         noext = F2FS_OPTION(sbi).noextensions;
 566         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 567
 568         if (!noext_cnt)
 569                 return 0;
 570
 571         for (no_index = 0; no_index < noext_cnt; no_index++) {
 572                 if (!strcasecmp("*", noext[no_index])) {
 573                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 574                         return -EINVAL;
 575                 }
 576                 for (index = 0; index < ext_cnt; index++) {
 577                         if (!strcasecmp(ext[index], noext[no_index])) {
 578                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 579                                                 ext[index]);
 580                                 return -EINVAL;
 581                         }
 582                 }
 583         }
 584         return 0;
 585 }
 586
 587 #ifdef CONFIG_F2FS_FS_LZ4
 588 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 589 {
 590 #ifdef CONFIG_F2FS_FS_LZ4HC
 591         unsigned int level;
 592
 593         if (strlen(str) == 3) {
 594                 F2FS_OPTION(sbi).compress_level = 0;
 595                 return 0;
 596         }
 597
 598         str += 3;
 599
 600         if (str[0] != ':') {
 601                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 602                 return -EINVAL;
 603         }
 604         if (kstrtouint(str + 1, 10, &level))
 605                 return -EINVAL;
 606
 607         if (!f2fs_is_compress_level_valid(COMPRESS_LZ4, level)) {
 608                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 609                 return -EINVAL;
 610         }
 611
 612         F2FS_OPTION(sbi).compress_level = level;
 613         return 0;
 614 #else
 615         if (strlen(str) == 3) {
 616                 F2FS_OPTION(sbi).compress_level = 0;
 617                 return 0;
 618         }
 619         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 620         return -EINVAL;
 621 #endif
 622 }
 623 #endif
 624
 625 #ifdef CONFIG_F2FS_FS_ZSTD
 626 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 627 {
 628         unsigned int level;
 629         int len = 4;
 630
 631         if (strlen(str) == len) {
 632                 F2FS_OPTION(sbi).compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
 633                 return 0;
 634         }
 635
 636         str += len;
 637
 638         if (str[0] != ':') {
 639                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 640                 return -EINVAL;
 641         }
 642         if (kstrtouint(str + 1, 10, &level))
 643                 return -EINVAL;
 644
 645         if (!f2fs_is_compress_level_valid(COMPRESS_ZSTD, level)) {
 646                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 647                 return -EINVAL;
 648         }
 649
 650         F2FS_OPTION(sbi).compress_level = level;
 651         return 0;
 652 }
 653 #endif
 654 #endif
 655
 656 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 657 {
 658         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 659         substring_t args[MAX_OPT_ARGS];
 660 #ifdef CONFIG_F2FS_FS_COMPRESSION
 661         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 662         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 663         int ext_cnt, noext_cnt;
 664 #endif
 665         char *p, *name;
 666         int arg = 0;
 667         kuid_t uid;
 668         kgid_t gid;
 669         int ret;
 670
 671         if (!options)
 672                 goto default_check;
 673
 674         while ((p = strsep(&options, ",")) != NULL) {
 675                 int token;
 676
 677                 if (!*p)
 678                         continue;
 679                 /*
 680                  * Initialize args struct so we know whether arg was
 681                  * found; some options take optional arguments.
 682                  */
 683                 args[0].to = args[0].from = NULL;
 684                 token = match_token(p, f2fs_tokens, args);
 685
 686                 switch (token) {
 687                 case Opt_gc_background:
 688                         name = match_strdup(&args[0]);
 689
 690                         if (!name)
 691                                 return -ENOMEM;
 692                         if (!strcmp(name, "on")) {
 693                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 694                         } else if (!strcmp(name, "off")) {
 695                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 696                         } else if (!strcmp(name, "sync")) {
 697                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 698                         } else {
 699                                 kfree(name);
 700                                 return -EINVAL;
 701                         }
 702                         kfree(name);
 703                         break;
 704                 case Opt_disable_roll_forward:
 705                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 706                         break;
 707                 case Opt_norecovery:
 708                         /* this option mounts f2fs with ro */
 709                         set_opt(sbi, NORECOVERY);
 710                         if (!f2fs_readonly(sb))
 711                                 return -EINVAL;
 712                         break;
 713                 case Opt_discard:
 714                         if (!f2fs_hw_support_discard(sbi)) {
 715                                 f2fs_warn(sbi, "device does not support discard");
 716                                 break;
 717                         }
 718                         set_opt(sbi, DISCARD);
 719                         break;
 720                 case Opt_nodiscard:
 721                         if (f2fs_hw_should_discard(sbi)) {
 722                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 723                                 return -EINVAL;
 724                         }
 725                         clear_opt(sbi, DISCARD);
 726                         break;
 727                 case Opt_noheap:
 728                         set_opt(sbi, NOHEAP);
 729                         break;
 730                 case Opt_heap:
 731                         clear_opt(sbi, NOHEAP);
 732                         break;
 733 #ifdef CONFIG_F2FS_FS_XATTR
 734                 case Opt_user_xattr:
 735                         set_opt(sbi, XATTR_USER);
 736                         break;
 737                 case Opt_nouser_xattr:
 738                         clear_opt(sbi, XATTR_USER);
 739                         break;
 740                 case Opt_inline_xattr:
 741                         set_opt(sbi, INLINE_XATTR);
 742                         break;
 743                 case Opt_noinline_xattr:
 744                         clear_opt(sbi, INLINE_XATTR);
 745                         break;
 746                 case Opt_inline_xattr_size:
 747                         if (args->from && match_int(args, &arg))
 748                                 return -EINVAL;
 749                         set_opt(sbi, INLINE_XATTR_SIZE);
 750                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 751                         break;
 752 #else
 753                 case Opt_user_xattr:
 754                         f2fs_info(sbi, "user_xattr options not supported");
 755                         break;
 756                 case Opt_nouser_xattr:
 757                         f2fs_info(sbi, "nouser_xattr options not supported");
 758                         break;
 759                 case Opt_inline_xattr:
 760                         f2fs_info(sbi, "inline_xattr options not supported");
 761                         break;
 762                 case Opt_noinline_xattr:
 763                         f2fs_info(sbi, "noinline_xattr options not supported");
 764                         break;
 765 #endif
 766 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 767                 case Opt_acl:
 768                         set_opt(sbi, POSIX_ACL);
 769                         break;
 770                 case Opt_noacl:
 771                         clear_opt(sbi, POSIX_ACL);
 772                         break;
 773 #else
 774                 case Opt_acl:
 775                         f2fs_info(sbi, "acl options not supported");
 776                         break;
 777                 case Opt_noacl:
 778                         f2fs_info(sbi, "noacl options not supported");
 779                         break;
 780 #endif
 781                 case Opt_active_logs:
 782                         if (args->from && match_int(args, &arg))
 783                                 return -EINVAL;
 784                         if (arg != 2 && arg != 4 &&
 785                                 arg != NR_CURSEG_PERSIST_TYPE)
 786                                 return -EINVAL;
 787                         F2FS_OPTION(sbi).active_logs = arg;
 788                         break;
 789                 case Opt_disable_ext_identify:
 790                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 791                         break;
 792                 case Opt_inline_data:
 793                         set_opt(sbi, INLINE_DATA);
 794                         break;
 795                 case Opt_inline_dentry:
 796                         set_opt(sbi, INLINE_DENTRY);
 797                         break;
 798                 case Opt_noinline_dentry:
 799                         clear_opt(sbi, INLINE_DENTRY);
 800                         break;
 801                 case Opt_flush_merge:
 802                         set_opt(sbi, FLUSH_MERGE);
 803                         break;
 804                 case Opt_noflush_merge:
 805                         clear_opt(sbi, FLUSH_MERGE);
 806                         break;
 807                 case Opt_nobarrier:
 808                         set_opt(sbi, NOBARRIER);
 809                         break;
 810                 case Opt_barrier:
 811                         clear_opt(sbi, NOBARRIER);
 812                         break;
 813                 case Opt_fastboot:
 814                         set_opt(sbi, FASTBOOT);
 815                         break;
 816                 case Opt_extent_cache:
 817                         set_opt(sbi, READ_EXTENT_CACHE);
 818                         break;
 819                 case Opt_noextent_cache:
 820                         clear_opt(sbi, READ_EXTENT_CACHE);
 821                         break;
 822                 case Opt_noinline_data:
 823                         clear_opt(sbi, INLINE_DATA);
 824                         break;
 825                 case Opt_data_flush:
 826                         set_opt(sbi, DATA_FLUSH);
 827                         break;
 828                 case Opt_reserve_root:
 829                         if (args->from && match_int(args, &arg))
 830                                 return -EINVAL;
 831                         if (test_opt(sbi, RESERVE_ROOT)) {
 832                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 833                                           F2FS_OPTION(sbi).root_reserved_blocks);
 834                         } else {
 835                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 836                                 set_opt(sbi, RESERVE_ROOT);
 837                         }
 838                         break;
 839                 case Opt_resuid:
 840                         if (args->from && match_int(args, &arg))
 841                                 return -EINVAL;
 842                         uid = make_kuid(current_user_ns(), arg);
 843                         if (!uid_valid(uid)) {
 844                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 845                                 return -EINVAL;
 846                         }
 847                         F2FS_OPTION(sbi).s_resuid = uid;
 848                         break;
 849                 case Opt_resgid:
 850                         if (args->from && match_int(args, &arg))
 851                                 return -EINVAL;
 852                         gid = make_kgid(current_user_ns(), arg);
 853                         if (!gid_valid(gid)) {
 854                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 855                                 return -EINVAL;
 856                         }
 857                         F2FS_OPTION(sbi).s_resgid = gid;
 858                         break;
 859                 case Opt_mode:
 860                         name = match_strdup(&args[0]);
 861
 862                         if (!name)
 863                                 return -ENOMEM;
 864                         if (!strcmp(name, "adaptive")) {
 865                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 866                         } else if (!strcmp(name, "lfs")) {
 867                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 868                         } else if (!strcmp(name, "fragment:segment")) {
 869                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 870                         } else if (!strcmp(name, "fragment:block")) {
 871                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 872                         } else {
 873                                 kfree(name);
 874                                 return -EINVAL;
 875                         }
 876                         kfree(name);
 877                         break;
 878                 case Opt_io_size_bits:
 879                         if (args->from && match_int(args, &arg))
 880                                 return -EINVAL;
 881                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 882                                 f2fs_warn(sbi, "Not support %ld, larger than %d",
 883                                         BIT(arg), BIO_MAX_VECS);
 884                                 return -EINVAL;
 885                         }
 886                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 887                         break;
 888 #ifdef CONFIG_F2FS_FAULT_INJECTION
 889                 case Opt_fault_injection:
 890                         if (args->from && match_int(args, &arg))
 891                                 return -EINVAL;
 892                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 893                         set_opt(sbi, FAULT_INJECTION);
 894                         break;
 895
 896                 case Opt_fault_type:
 897                         if (args->from && match_int(args, &arg))
 898                                 return -EINVAL;
 899                         f2fs_build_fault_attr(sbi, 0, arg);
 900                         set_opt(sbi, FAULT_INJECTION);
 901                         break;
 902 #else
 903                 case Opt_fault_injection:
 904                         f2fs_info(sbi, "fault_injection options not supported");
 905                         break;
 906
 907                 case Opt_fault_type:
 908                         f2fs_info(sbi, "fault_type options not supported");
 909                         break;
 910 #endif
 911                 case Opt_lazytime:
 912                         sb->s_flags |= SB_LAZYTIME;
 913                         break;
 914                 case Opt_nolazytime:
 915                         sb->s_flags &= ~SB_LAZYTIME;
 916                         break;
 917 #ifdef CONFIG_QUOTA
 918                 case Opt_quota:
 919                 case Opt_usrquota:
 920                         set_opt(sbi, USRQUOTA);
 921                         break;
 922                 case Opt_grpquota:
 923                         set_opt(sbi, GRPQUOTA);
 924                         break;
 925                 case Opt_prjquota:
 926                         set_opt(sbi, PRJQUOTA);
 927                         break;
 928                 case Opt_usrjquota:
 929                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 930                         if (ret)
 931                                 return ret;
 932                         break;
 933                 case Opt_grpjquota:
 934                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 935                         if (ret)
 936                                 return ret;
 937                         break;
 938                 case Opt_prjjquota:
 939                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 940                         if (ret)
 941                                 return ret;
 942                         break;
 943                 case Opt_offusrjquota:
 944                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 945                         if (ret)
 946                                 return ret;
 947                         break;
 948                 case Opt_offgrpjquota:
 949                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 950                         if (ret)
 951                                 return ret;
 952                         break;
 953                 case Opt_offprjjquota:
 954                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 955                         if (ret)
 956                                 return ret;
 957                         break;
 958                 case Opt_jqfmt_vfsold:
 959                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 960                         break;
 961                 case Opt_jqfmt_vfsv0:
 962                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 963                         break;
 964                 case Opt_jqfmt_vfsv1:
 965                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 966                         break;
 967                 case Opt_noquota:
 968                         clear_opt(sbi, QUOTA);
 969                         clear_opt(sbi, USRQUOTA);
 970                         clear_opt(sbi, GRPQUOTA);
 971                         clear_opt(sbi, PRJQUOTA);
 972                         break;
 973 #else
 974                 case Opt_quota:
 975                 case Opt_usrquota:
 976                 case Opt_grpquota:
 977                 case Opt_prjquota:
 978                 case Opt_usrjquota:
 979                 case Opt_grpjquota:
 980                 case Opt_prjjquota:
 981                 case Opt_offusrjquota:
 982                 case Opt_offgrpjquota:
 983                 case Opt_offprjjquota:
 984                 case Opt_jqfmt_vfsold:
 985                 case Opt_jqfmt_vfsv0:
 986                 case Opt_jqfmt_vfsv1:
 987                 case Opt_noquota:
 988                         f2fs_info(sbi, "quota operations not supported");
 989                         break;
 990 #endif
 991                 case Opt_alloc:
 992                         name = match_strdup(&args[0]);
 993                         if (!name)
 994                                 return -ENOMEM;
 995
 996                         if (!strcmp(name, "default")) {
 997                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
 998                         } else if (!strcmp(name, "reuse")) {
 999                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1000                         } else {
1001                                 kfree(name);
1002                                 return -EINVAL;
1003                         }
1004                         kfree(name);
1005                         break;
1006                 case Opt_fsync:
1007                         name = match_strdup(&args[0]);
1008                         if (!name)
1009                                 return -ENOMEM;
1010                         if (!strcmp(name, "posix")) {
1011                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1012                         } else if (!strcmp(name, "strict")) {
1013                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1014                         } else if (!strcmp(name, "nobarrier")) {
1015                                 F2FS_OPTION(sbi).fsync_mode =
1016                                                         FSYNC_MODE_NOBARRIER;
1017                         } else {
1018                                 kfree(name);
1019                                 return -EINVAL;
1020                         }
1021                         kfree(name);
1022                         break;
1023                 case Opt_test_dummy_encryption:
1024                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1025                                                              is_remount);
1026                         if (ret)
1027                                 return ret;
1028                         break;
1029                 case Opt_inlinecrypt:
1030 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1031                         sb->s_flags |= SB_INLINECRYPT;
1032 #else
1033                         f2fs_info(sbi, "inline encryption not supported");
1034 #endif
1035                         break;
1036                 case Opt_checkpoint_disable_cap_perc:
1037                         if (args->from && match_int(args, &arg))
1038                                 return -EINVAL;
1039                         if (arg < 0 || arg > 100)
1040                                 return -EINVAL;
1041                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1042                         set_opt(sbi, DISABLE_CHECKPOINT);
1043                         break;
1044                 case Opt_checkpoint_disable_cap:
1045                         if (args->from && match_int(args, &arg))
1046                                 return -EINVAL;
1047                         F2FS_OPTION(sbi).unusable_cap = arg;
1048                         set_opt(sbi, DISABLE_CHECKPOINT);
1049                         break;
1050                 case Opt_checkpoint_disable:
1051                         set_opt(sbi, DISABLE_CHECKPOINT);
1052                         break;
1053                 case Opt_checkpoint_enable:
1054                         clear_opt(sbi, DISABLE_CHECKPOINT);
1055                         break;
1056                 case Opt_checkpoint_merge:
1057                         set_opt(sbi, MERGE_CHECKPOINT);
1058                         break;
1059                 case Opt_nocheckpoint_merge:
1060                         clear_opt(sbi, MERGE_CHECKPOINT);
1061                         break;
1062 #ifdef CONFIG_F2FS_FS_COMPRESSION
1063                 case Opt_compress_algorithm:
1064                         if (!f2fs_sb_has_compression(sbi)) {
1065                                 f2fs_info(sbi, "Image doesn't support compression");
1066                                 break;
1067                         }
1068                         name = match_strdup(&args[0]);
1069                         if (!name)
1070                                 return -ENOMEM;
1071                         if (!strcmp(name, "lzo")) {
1072 #ifdef CONFIG_F2FS_FS_LZO
1073                                 F2FS_OPTION(sbi).compress_level = 0;
1074                                 F2FS_OPTION(sbi).compress_algorithm =
1075                                                                 COMPRESS_LZO;
1076 #else
1077                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1078 #endif
1079                         } else if (!strncmp(name, "lz4", 3)) {
1080 #ifdef CONFIG_F2FS_FS_LZ4
1081                                 ret = f2fs_set_lz4hc_level(sbi, name);
1082                                 if (ret) {
1083                                         kfree(name);
1084                                         return -EINVAL;
1085                                 }
1086                                 F2FS_OPTION(sbi).compress_algorithm =
1087                                                                 COMPRESS_LZ4;
1088 #else
1089                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1090 #endif
1091                         } else if (!strncmp(name, "zstd", 4)) {
1092 #ifdef CONFIG_F2FS_FS_ZSTD
1093                                 ret = f2fs_set_zstd_level(sbi, name);
1094                                 if (ret) {
1095                                         kfree(name);
1096                                         return -EINVAL;
1097                                 }
1098                                 F2FS_OPTION(sbi).compress_algorithm =
1099                                                                 COMPRESS_ZSTD;
1100 #else
1101                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1102 #endif
1103                         } else if (!strcmp(name, "lzo-rle")) {
1104 #ifdef CONFIG_F2FS_FS_LZORLE
1105                                 F2FS_OPTION(sbi).compress_level = 0;
1106                                 F2FS_OPTION(sbi).compress_algorithm =
1107                                                                 COMPRESS_LZORLE;
1108 #else
1109                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1110 #endif
1111                         } else {
1112                                 kfree(name);
1113                                 return -EINVAL;
1114                         }
1115                         kfree(name);
1116                         break;
1117                 case Opt_compress_log_size:
1118                         if (!f2fs_sb_has_compression(sbi)) {
1119                                 f2fs_info(sbi, "Image doesn't support compression");
1120                                 break;
1121                         }
1122                         if (args->from && match_int(args, &arg))
1123                                 return -EINVAL;
1124                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1125                                 arg > MAX_COMPRESS_LOG_SIZE) {
1126                                 f2fs_err(sbi,
1127                                         "Compress cluster log size is out of range");
1128                                 return -EINVAL;
1129                         }
1130                         F2FS_OPTION(sbi).compress_log_size = arg;
1131                         break;
1132                 case Opt_compress_extension:
1133                         if (!f2fs_sb_has_compression(sbi)) {
1134                                 f2fs_info(sbi, "Image doesn't support compression");
1135                                 break;
1136                         }
1137                         name = match_strdup(&args[0]);
1138                         if (!name)
1139                                 return -ENOMEM;
1140
1141                         ext = F2FS_OPTION(sbi).extensions;
1142                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1143
1144                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1145                                 ext_cnt >= COMPRESS_EXT_NUM) {
1146                                 f2fs_err(sbi,
1147                                         "invalid extension length/number");
1148                                 kfree(name);
1149                                 return -EINVAL;
1150                         }
1151
1152                         strcpy(ext[ext_cnt], name);
1153                         F2FS_OPTION(sbi).compress_ext_cnt++;
1154                         kfree(name);
1155                         break;
1156                 case Opt_nocompress_extension:
1157                         if (!f2fs_sb_has_compression(sbi)) {
1158                                 f2fs_info(sbi, "Image doesn't support compression");
1159                                 break;
1160                         }
1161                         name = match_strdup(&args[0]);
1162                         if (!name)
1163                                 return -ENOMEM;
1164
1165                         noext = F2FS_OPTION(sbi).noextensions;
1166                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1167
1168                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1169                                 noext_cnt >= COMPRESS_EXT_NUM) {
1170                                 f2fs_err(sbi,
1171                                         "invalid extension length/number");
1172                                 kfree(name);
1173                                 return -EINVAL;
1174                         }
1175
1176                         strcpy(noext[noext_cnt], name);
1177                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1178                         kfree(name);
1179                         break;
1180                 case Opt_compress_chksum:
1181                         if (!f2fs_sb_has_compression(sbi)) {
1182                                 f2fs_info(sbi, "Image doesn't support compression");
1183                                 break;
1184                         }
1185                         F2FS_OPTION(sbi).compress_chksum = true;
1186                         break;
1187                 case Opt_compress_mode:
1188                         if (!f2fs_sb_has_compression(sbi)) {
1189                                 f2fs_info(sbi, "Image doesn't support compression");
1190                                 break;
1191                         }
1192                         name = match_strdup(&args[0]);
1193                         if (!name)
1194                                 return -ENOMEM;
1195                         if (!strcmp(name, "fs")) {
1196                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1197                         } else if (!strcmp(name, "user")) {
1198                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1199                         } else {
1200                                 kfree(name);
1201                                 return -EINVAL;
1202                         }
1203                         kfree(name);
1204                         break;
1205                 case Opt_compress_cache:
1206                         if (!f2fs_sb_has_compression(sbi)) {
1207                                 f2fs_info(sbi, "Image doesn't support compression");
1208                                 break;
1209                         }
1210                         set_opt(sbi, COMPRESS_CACHE);
1211                         break;
1212 #else
1213                 case Opt_compress_algorithm:
1214                 case Opt_compress_log_size:
1215                 case Opt_compress_extension:
1216                 case Opt_nocompress_extension:
1217                 case Opt_compress_chksum:
1218                 case Opt_compress_mode:
1219                 case Opt_compress_cache:
1220                         f2fs_info(sbi, "compression options not supported");
1221                         break;
1222 #endif
1223                 case Opt_atgc:
1224                         set_opt(sbi, ATGC);
1225                         break;
1226                 case Opt_gc_merge:
1227                         set_opt(sbi, GC_MERGE);
1228                         break;
1229                 case Opt_nogc_merge:
1230                         clear_opt(sbi, GC_MERGE);
1231                         break;
1232                 case Opt_discard_unit:
1233                         name = match_strdup(&args[0]);
1234                         if (!name)
1235                                 return -ENOMEM;
1236                         if (!strcmp(name, "block")) {
1237                                 F2FS_OPTION(sbi).discard_unit =
1238                                                 DISCARD_UNIT_BLOCK;
1239                         } else if (!strcmp(name, "segment")) {
1240                                 F2FS_OPTION(sbi).discard_unit =
1241                                                 DISCARD_UNIT_SEGMENT;
1242                         } else if (!strcmp(name, "section")) {
1243                                 F2FS_OPTION(sbi).discard_unit =
1244                                                 DISCARD_UNIT_SECTION;
1245                         } else {
1246                                 kfree(name);
1247                                 return -EINVAL;
1248                         }
1249                         kfree(name);
1250                         break;
1251                 case Opt_memory_mode:
1252                         name = match_strdup(&args[0]);
1253                         if (!name)
1254                                 return -ENOMEM;
1255                         if (!strcmp(name, "normal")) {
1256                                 F2FS_OPTION(sbi).memory_mode =
1257                                                 MEMORY_MODE_NORMAL;
1258                         } else if (!strcmp(name, "low")) {
1259                                 F2FS_OPTION(sbi).memory_mode =
1260                                                 MEMORY_MODE_LOW;
1261                         } else {
1262                                 kfree(name);
1263                                 return -EINVAL;
1264                         }
1265                         kfree(name);
1266                         break;
1267                 case Opt_age_extent_cache:
1268                         set_opt(sbi, AGE_EXTENT_CACHE);
1269                         break;
1270                 case Opt_errors:
1271                         name = match_strdup(&args[0]);
1272                         if (!name)
1273                                 return -ENOMEM;
1274                         if (!strcmp(name, "remount-ro")) {
1275                                 F2FS_OPTION(sbi).errors =
1276                                                 MOUNT_ERRORS_READONLY;
1277                         } else if (!strcmp(name, "continue")) {
1278                                 F2FS_OPTION(sbi).errors =
1279                                                 MOUNT_ERRORS_CONTINUE;
1280                         } else if (!strcmp(name, "panic")) {
1281                                 F2FS_OPTION(sbi).errors =
1282                                                 MOUNT_ERRORS_PANIC;
1283                         } else {
1284                                 kfree(name);
1285                                 return -EINVAL;
1286                         }
1287                         kfree(name);
1288                         break;
1289                 default:
1290                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1291                                  p);
1292                         return -EINVAL;
1293                 }
1294         }
1295 default_check:
1296 #ifdef CONFIG_QUOTA
1297         if (f2fs_check_quota_options(sbi))
1298                 return -EINVAL;
1299 #else
1300         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1301                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1302                 return -EINVAL;
1303         }
1304         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1305                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1306                 return -EINVAL;
1307         }
1308 #endif
1309 #if !IS_ENABLED(CONFIG_UNICODE)
1310         if (f2fs_sb_has_casefold(sbi)) {
1311                 f2fs_err(sbi,
1312                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1313                 return -EINVAL;
1314         }
1315 #endif
1316         /*
1317          * The BLKZONED feature indicates that the drive was formatted with
1318          * zone alignment optimization. This is optional for host-aware
1319          * devices, but mandatory for host-managed zoned block devices.
1320          */
1321         if (f2fs_sb_has_blkzoned(sbi)) {
1322 #ifdef CONFIG_BLK_DEV_ZONED
1323                 if (F2FS_OPTION(sbi).discard_unit !=
1324                                                 DISCARD_UNIT_SECTION) {
1325                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1326                         F2FS_OPTION(sbi).discard_unit =
1327                                         DISCARD_UNIT_SECTION;
1328                 }
1329
1330                 if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) {
1331                         f2fs_info(sbi, "Only lfs mode is allowed with zoned block device feature");
1332                         return -EINVAL;
1333                 }
1334 #else
1335                 f2fs_err(sbi, "Zoned block device support is not enabled");
1336                 return -EINVAL;
1337 #endif
1338         }
1339
1340 #ifdef CONFIG_F2FS_FS_COMPRESSION
1341         if (f2fs_test_compress_extension(sbi)) {
1342                 f2fs_err(sbi, "invalid compress or nocompress extension");
1343                 return -EINVAL;
1344         }
1345 #endif
1346
1347         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1348                 f2fs_err(sbi, "Should set mode=lfs with %luKB-sized IO",
1349                          F2FS_IO_SIZE_KB(sbi));
1350                 return -EINVAL;
1351         }
1352
1353         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1354                 int min_size, max_size;
1355
1356                 if (!f2fs_sb_has_extra_attr(sbi) ||
1357                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1358                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1359                         return -EINVAL;
1360                 }
1361                 if (!test_opt(sbi, INLINE_XATTR)) {
1362                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1363                         return -EINVAL;
1364                 }
1365
1366                 min_size = MIN_INLINE_XATTR_SIZE;
1367                 max_size = MAX_INLINE_XATTR_SIZE;
1368
1369                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1370                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1371                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1372                                  min_size, max_size);
1373                         return -EINVAL;
1374                 }
1375         }
1376
1377         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1378                 f2fs_err(sbi, "LFS is not compatible with checkpoint=disable");
1379                 return -EINVAL;
1380         }
1381
1382         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1383                 f2fs_err(sbi, "LFS is not compatible with ATGC");
1384                 return -EINVAL;
1385         }
1386
1387         if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1388                 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1389                 return -EINVAL;
1390         }
1391
1392         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1393                 f2fs_err(sbi, "Allow to mount readonly mode only");
1394                 return -EROFS;
1395         }
1396         return 0;
1397 }
1398
1399 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1400 {
1401         struct f2fs_inode_info *fi;
1402
1403         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC))
1404                 return NULL;
1405
1406         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1407         if (!fi)
1408                 return NULL;
1409
1410         init_once((void *) fi);
1411
1412         /* Initialize f2fs-specific inode info */
1413         atomic_set(&fi->dirty_pages, 0);
1414         atomic_set(&fi->i_compr_blocks, 0);
1415         init_f2fs_rwsem(&fi->i_sem);
1416         spin_lock_init(&fi->i_size_lock);
1417         INIT_LIST_HEAD(&fi->dirty_list);
1418         INIT_LIST_HEAD(&fi->gdirty_list);
1419         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1420         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1421         init_f2fs_rwsem(&fi->i_xattr_sem);
1422
1423         /* Will be used by directory only */
1424         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1425
1426         return &fi->vfs_inode;
1427 }
1428
1429 static int f2fs_drop_inode(struct inode *inode)
1430 {
1431         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1432         int ret;
1433
1434         /*
1435          * during filesystem shutdown, if checkpoint is disabled,
1436          * drop useless meta/node dirty pages.
1437          */
1438         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1439                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1440                         inode->i_ino == F2FS_META_INO(sbi)) {
1441                         trace_f2fs_drop_inode(inode, 1);
1442                         return 1;
1443                 }
1444         }
1445
1446         /*
1447          * This is to avoid a deadlock condition like below.
1448          * writeback_single_inode(inode)
1449          *  - f2fs_write_data_page
1450          *    - f2fs_gc -> iput -> evict
1451          *       - inode_wait_for_writeback(inode)
1452          */
1453         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1454                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1455                         /* to avoid evict_inode call simultaneously */
1456                         atomic_inc(&inode->i_count);
1457                         spin_unlock(&inode->i_lock);
1458
1459                         /* should remain fi->extent_tree for writepage */
1460                         f2fs_destroy_extent_node(inode);
1461
1462                         sb_start_intwrite(inode->i_sb);
1463                         f2fs_i_size_write(inode, 0);
1464
1465                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1466                                         inode, NULL, 0, DATA);
1467                         truncate_inode_pages_final(inode->i_mapping);
1468
1469                         if (F2FS_HAS_BLOCKS(inode))
1470                                 f2fs_truncate(inode);
1471
1472                         sb_end_intwrite(inode->i_sb);
1473
1474                         spin_lock(&inode->i_lock);
1475                         atomic_dec(&inode->i_count);
1476                 }
1477                 trace_f2fs_drop_inode(inode, 0);
1478                 return 0;
1479         }
1480         ret = generic_drop_inode(inode);
1481         if (!ret)
1482                 ret = fscrypt_drop_inode(inode);
1483         trace_f2fs_drop_inode(inode, ret);
1484         return ret;
1485 }
1486
1487 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1488 {
1489         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1490         int ret = 0;
1491
1492         spin_lock(&sbi->inode_lock[DIRTY_META]);
1493         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1494                 ret = 1;
1495         } else {
1496                 set_inode_flag(inode, FI_DIRTY_INODE);
1497                 stat_inc_dirty_inode(sbi, DIRTY_META);
1498         }
1499         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1500                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1501                                 &sbi->inode_list[DIRTY_META]);
1502                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1503         }
1504         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1505         return ret;
1506 }
1507
1508 void f2fs_inode_synced(struct inode *inode)
1509 {
1510         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1511
1512         spin_lock(&sbi->inode_lock[DIRTY_META]);
1513         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1514                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1515                 return;
1516         }
1517         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1518                 list_del_init(&F2FS_I(inode)->gdirty_list);
1519                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1520         }
1521         clear_inode_flag(inode, FI_DIRTY_INODE);
1522         clear_inode_flag(inode, FI_AUTO_RECOVER);
1523         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1524         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1525 }
1526
1527 /*
1528  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1529  *
1530  * We should call set_dirty_inode to write the dirty inode through write_inode.
1531  */
1532 static void f2fs_dirty_inode(struct inode *inode, int flags)
1533 {
1534         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1535
1536         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1537                         inode->i_ino == F2FS_META_INO(sbi))
1538                 return;
1539
1540         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1541                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1542
1543         f2fs_inode_dirtied(inode, false);
1544 }
1545
1546 static void f2fs_free_inode(struct inode *inode)
1547 {
1548         fscrypt_free_inode(inode);
1549         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1550 }
1551
1552 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1553 {
1554         percpu_counter_destroy(&sbi->total_valid_inode_count);
1555         percpu_counter_destroy(&sbi->rf_node_block_count);
1556         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1557 }
1558
1559 static void destroy_device_list(struct f2fs_sb_info *sbi)
1560 {
1561         int i;
1562
1563         for (i = 0; i < sbi->s_ndevs; i++) {
1564                 if (i > 0)
1565                         blkdev_put(FDEV(i).bdev, sbi->sb);
1566 #ifdef CONFIG_BLK_DEV_ZONED
1567                 kvfree(FDEV(i).blkz_seq);
1568 #endif
1569         }
1570         kvfree(sbi->devs);
1571 }
1572
1573 static void f2fs_put_super(struct super_block *sb)
1574 {
1575         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1576         int i;
1577         int err = 0;
1578         bool done;
1579
1580         /* unregister procfs/sysfs entries in advance to avoid race case */
1581         f2fs_unregister_sysfs(sbi);
1582
1583         f2fs_quota_off_umount(sb);
1584
1585         /* prevent remaining shrinker jobs */
1586         mutex_lock(&sbi->umount_mutex);
1587
1588         /*
1589          * flush all issued checkpoints and stop checkpoint issue thread.
1590          * after then, all checkpoints should be done by each process context.
1591          */
1592         f2fs_stop_ckpt_thread(sbi);
1593
1594         /*
1595          * We don't need to do checkpoint when superblock is clean.
1596          * But, the previous checkpoint was not done by umount, it needs to do
1597          * clean checkpoint again.
1598          */
1599         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1600                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1601                 struct cp_control cpc = {
1602                         .reason = CP_UMOUNT,
1603                 };
1604                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1605                 err = f2fs_write_checkpoint(sbi, &cpc);
1606         }
1607
1608         /* be sure to wait for any on-going discard commands */
1609         done = f2fs_issue_discard_timeout(sbi);
1610         if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && done) {
1611                 struct cp_control cpc = {
1612                         .reason = CP_UMOUNT | CP_TRIMMED,
1613                 };
1614                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1615                 err = f2fs_write_checkpoint(sbi, &cpc);
1616         }
1617
1618         /*
1619          * normally superblock is clean, so we need to release this.
1620          * In addition, EIO will skip do checkpoint, we need this as well.
1621          */
1622         f2fs_release_ino_entry(sbi, true);
1623
1624         f2fs_leave_shrinker(sbi);
1625         mutex_unlock(&sbi->umount_mutex);
1626
1627         /* our cp_error case, we can wait for any writeback page */
1628         f2fs_flush_merged_writes(sbi);
1629
1630         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1631
1632         if (err) {
1633                 truncate_inode_pages_final(NODE_MAPPING(sbi));
1634                 truncate_inode_pages_final(META_MAPPING(sbi));
1635         }
1636
1637         for (i = 0; i < NR_COUNT_TYPE; i++) {
1638                 if (!get_pages(sbi, i))
1639                         continue;
1640                 f2fs_err(sbi, "detect filesystem reference count leak during "
1641                         "umount, type: %d, count: %lld", i, get_pages(sbi, i));
1642                 f2fs_bug_on(sbi, 1);
1643         }
1644
1645         f2fs_bug_on(sbi, sbi->fsync_node_num);
1646
1647         f2fs_destroy_compress_inode(sbi);
1648
1649         iput(sbi->node_inode);
1650         sbi->node_inode = NULL;
1651
1652         iput(sbi->meta_inode);
1653         sbi->meta_inode = NULL;
1654
1655         /*
1656          * iput() can update stat information, if f2fs_write_checkpoint()
1657          * above failed with error.
1658          */
1659         f2fs_destroy_stats(sbi);
1660
1661         /* destroy f2fs internal modules */
1662         f2fs_destroy_node_manager(sbi);
1663         f2fs_destroy_segment_manager(sbi);
1664
1665         /* flush s_error_work before sbi destroy */
1666         flush_work(&sbi->s_error_work);
1667
1668         f2fs_destroy_post_read_wq(sbi);
1669
1670         kvfree(sbi->ckpt);
1671
1672         sb->s_fs_info = NULL;
1673         if (sbi->s_chksum_driver)
1674                 crypto_free_shash(sbi->s_chksum_driver);
1675         kfree(sbi->raw_super);
1676
1677         destroy_device_list(sbi);
1678         f2fs_destroy_page_array_cache(sbi);
1679         f2fs_destroy_xattr_caches(sbi);
1680         mempool_destroy(sbi->write_io_dummy);
1681 #ifdef CONFIG_QUOTA
1682         for (i = 0; i < MAXQUOTAS; i++)
1683                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1684 #endif
1685         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1686         destroy_percpu_info(sbi);
1687         f2fs_destroy_iostat(sbi);
1688         for (i = 0; i < NR_PAGE_TYPE; i++)
1689                 kvfree(sbi->write_io[i]);
1690 #if IS_ENABLED(CONFIG_UNICODE)
1691         utf8_unload(sb->s_encoding);
1692 #endif
1693         kfree(sbi);
1694 }
1695
1696 int f2fs_sync_fs(struct super_block *sb, int sync)
1697 {
1698         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1699         int err = 0;
1700
1701         if (unlikely(f2fs_cp_error(sbi)))
1702                 return 0;
1703         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1704                 return 0;
1705
1706         trace_f2fs_sync_fs(sb, sync);
1707
1708         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1709                 return -EAGAIN;
1710
1711         if (sync) {
1712                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1713                 err = f2fs_issue_checkpoint(sbi);
1714         }
1715
1716         return err;
1717 }
1718
1719 static int f2fs_freeze(struct super_block *sb)
1720 {
1721         if (f2fs_readonly(sb))
1722                 return 0;
1723
1724         /* IO error happened before */
1725         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1726                 return -EIO;
1727
1728         /* must be clean, since sync_filesystem() was already called */
1729         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1730                 return -EINVAL;
1731
1732         /* Let's flush checkpoints and stop the thread. */
1733         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1734
1735         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1736         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1737         return 0;
1738 }
1739
1740 static int f2fs_unfreeze(struct super_block *sb)
1741 {
1742         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1743         return 0;
1744 }
1745
1746 #ifdef CONFIG_QUOTA
1747 static int f2fs_statfs_project(struct super_block *sb,
1748                                 kprojid_t projid, struct kstatfs *buf)
1749 {
1750         struct kqid qid;
1751         struct dquot *dquot;
1752         u64 limit;
1753         u64 curblock;
1754
1755         qid = make_kqid_projid(projid);
1756         dquot = dqget(sb, qid);
1757         if (IS_ERR(dquot))
1758                 return PTR_ERR(dquot);
1759         spin_lock(&dquot->dq_dqb_lock);
1760
1761         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1762                                         dquot->dq_dqb.dqb_bhardlimit);
1763         if (limit)
1764                 limit >>= sb->s_blocksize_bits;
1765
1766         if (limit && buf->f_blocks > limit) {
1767                 curblock = (dquot->dq_dqb.dqb_curspace +
1768                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1769                 buf->f_blocks = limit;
1770                 buf->f_bfree = buf->f_bavail =
1771                         (buf->f_blocks > curblock) ?
1772                          (buf->f_blocks - curblock) : 0;
1773         }
1774
1775         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1776                                         dquot->dq_dqb.dqb_ihardlimit);
1777
1778         if (limit && buf->f_files > limit) {
1779                 buf->f_files = limit;
1780                 buf->f_ffree =
1781                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1782                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1783         }
1784
1785         spin_unlock(&dquot->dq_dqb_lock);
1786         dqput(dquot);
1787         return 0;
1788 }
1789 #endif
1790
1791 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1792 {
1793         struct super_block *sb = dentry->d_sb;
1794         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1795         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1796         block_t total_count, user_block_count, start_count;
1797         u64 avail_node_count;
1798         unsigned int total_valid_node_count;
1799
1800         total_count = le64_to_cpu(sbi->raw_super->block_count);
1801         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1802         buf->f_type = F2FS_SUPER_MAGIC;
1803         buf->f_bsize = sbi->blocksize;
1804
1805         buf->f_blocks = total_count - start_count;
1806
1807         spin_lock(&sbi->stat_lock);
1808
1809         user_block_count = sbi->user_block_count;
1810         total_valid_node_count = valid_node_count(sbi);
1811         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1812         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1813                                                 sbi->current_reserved_blocks;
1814
1815         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1816                 buf->f_bfree = 0;
1817         else
1818                 buf->f_bfree -= sbi->unusable_block_count;
1819         spin_unlock(&sbi->stat_lock);
1820
1821         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1822                 buf->f_bavail = buf->f_bfree -
1823                                 F2FS_OPTION(sbi).root_reserved_blocks;
1824         else
1825                 buf->f_bavail = 0;
1826
1827         if (avail_node_count > user_block_count) {
1828                 buf->f_files = user_block_count;
1829                 buf->f_ffree = buf->f_bavail;
1830         } else {
1831                 buf->f_files = avail_node_count;
1832                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1833                                         buf->f_bavail);
1834         }
1835
1836         buf->f_namelen = F2FS_NAME_LEN;
1837         buf->f_fsid    = u64_to_fsid(id);
1838
1839 #ifdef CONFIG_QUOTA
1840         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1841                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1842                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1843         }
1844 #endif
1845         return 0;
1846 }
1847
1848 static inline void f2fs_show_quota_options(struct seq_file *seq,
1849                                            struct super_block *sb)
1850 {
1851 #ifdef CONFIG_QUOTA
1852         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1853
1854         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1855                 char *fmtname = "";
1856
1857                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1858                 case QFMT_VFS_OLD:
1859                         fmtname = "vfsold";
1860                         break;
1861                 case QFMT_VFS_V0:
1862                         fmtname = "vfsv0";
1863                         break;
1864                 case QFMT_VFS_V1:
1865                         fmtname = "vfsv1";
1866                         break;
1867                 }
1868                 seq_printf(seq, ",jqfmt=%s", fmtname);
1869         }
1870
1871         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1872                 seq_show_option(seq, "usrjquota",
1873                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1874
1875         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1876                 seq_show_option(seq, "grpjquota",
1877                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1878
1879         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1880                 seq_show_option(seq, "prjjquota",
1881                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1882 #endif
1883 }
1884
1885 #ifdef CONFIG_F2FS_FS_COMPRESSION
1886 static inline void f2fs_show_compress_options(struct seq_file *seq,
1887                                                         struct super_block *sb)
1888 {
1889         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1890         char *algtype = "";
1891         int i;
1892
1893         if (!f2fs_sb_has_compression(sbi))
1894                 return;
1895
1896         switch (F2FS_OPTION(sbi).compress_algorithm) {
1897         case COMPRESS_LZO:
1898                 algtype = "lzo";
1899                 break;
1900         case COMPRESS_LZ4:
1901                 algtype = "lz4";
1902                 break;
1903         case COMPRESS_ZSTD:
1904                 algtype = "zstd";
1905                 break;
1906         case COMPRESS_LZORLE:
1907                 algtype = "lzo-rle";
1908                 break;
1909         }
1910         seq_printf(seq, ",compress_algorithm=%s", algtype);
1911
1912         if (F2FS_OPTION(sbi).compress_level)
1913                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1914
1915         seq_printf(seq, ",compress_log_size=%u",
1916                         F2FS_OPTION(sbi).compress_log_size);
1917
1918         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1919                 seq_printf(seq, ",compress_extension=%s",
1920                         F2FS_OPTION(sbi).extensions[i]);
1921         }
1922
1923         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1924                 seq_printf(seq, ",nocompress_extension=%s",
1925                         F2FS_OPTION(sbi).noextensions[i]);
1926         }
1927
1928         if (F2FS_OPTION(sbi).compress_chksum)
1929                 seq_puts(seq, ",compress_chksum");
1930
1931         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1932                 seq_printf(seq, ",compress_mode=%s", "fs");
1933         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1934                 seq_printf(seq, ",compress_mode=%s", "user");
1935
1936         if (test_opt(sbi, COMPRESS_CACHE))
1937                 seq_puts(seq, ",compress_cache");
1938 }
1939 #endif
1940
1941 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1942 {
1943         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1944
1945         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1946                 seq_printf(seq, ",background_gc=%s", "sync");
1947         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1948                 seq_printf(seq, ",background_gc=%s", "on");
1949         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1950                 seq_printf(seq, ",background_gc=%s", "off");
1951
1952         if (test_opt(sbi, GC_MERGE))
1953                 seq_puts(seq, ",gc_merge");
1954         else
1955                 seq_puts(seq, ",nogc_merge");
1956
1957         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1958                 seq_puts(seq, ",disable_roll_forward");
1959         if (test_opt(sbi, NORECOVERY))
1960                 seq_puts(seq, ",norecovery");
1961         if (test_opt(sbi, DISCARD)) {
1962                 seq_puts(seq, ",discard");
1963                 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
1964                         seq_printf(seq, ",discard_unit=%s", "block");
1965                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
1966                         seq_printf(seq, ",discard_unit=%s", "segment");
1967                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
1968                         seq_printf(seq, ",discard_unit=%s", "section");
1969         } else {
1970                 seq_puts(seq, ",nodiscard");
1971         }
1972         if (test_opt(sbi, NOHEAP))
1973                 seq_puts(seq, ",no_heap");
1974         else
1975                 seq_puts(seq, ",heap");
1976 #ifdef CONFIG_F2FS_FS_XATTR
1977         if (test_opt(sbi, XATTR_USER))
1978                 seq_puts(seq, ",user_xattr");
1979         else
1980                 seq_puts(seq, ",nouser_xattr");
1981         if (test_opt(sbi, INLINE_XATTR))
1982                 seq_puts(seq, ",inline_xattr");
1983         else
1984                 seq_puts(seq, ",noinline_xattr");
1985         if (test_opt(sbi, INLINE_XATTR_SIZE))
1986                 seq_printf(seq, ",inline_xattr_size=%u",
1987                                         F2FS_OPTION(sbi).inline_xattr_size);
1988 #endif
1989 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1990         if (test_opt(sbi, POSIX_ACL))
1991                 seq_puts(seq, ",acl");
1992         else
1993                 seq_puts(seq, ",noacl");
1994 #endif
1995         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1996                 seq_puts(seq, ",disable_ext_identify");
1997         if (test_opt(sbi, INLINE_DATA))
1998                 seq_puts(seq, ",inline_data");
1999         else
2000                 seq_puts(seq, ",noinline_data");
2001         if (test_opt(sbi, INLINE_DENTRY))
2002                 seq_puts(seq, ",inline_dentry");
2003         else
2004                 seq_puts(seq, ",noinline_dentry");
2005         if (test_opt(sbi, FLUSH_MERGE))
2006                 seq_puts(seq, ",flush_merge");
2007         else
2008                 seq_puts(seq, ",noflush_merge");
2009         if (test_opt(sbi, NOBARRIER))
2010                 seq_puts(seq, ",nobarrier");
2011         else
2012                 seq_puts(seq, ",barrier");
2013         if (test_opt(sbi, FASTBOOT))
2014                 seq_puts(seq, ",fastboot");
2015         if (test_opt(sbi, READ_EXTENT_CACHE))
2016                 seq_puts(seq, ",extent_cache");
2017         else
2018                 seq_puts(seq, ",noextent_cache");
2019         if (test_opt(sbi, AGE_EXTENT_CACHE))
2020                 seq_puts(seq, ",age_extent_cache");
2021         if (test_opt(sbi, DATA_FLUSH))
2022                 seq_puts(seq, ",data_flush");
2023
2024         seq_puts(seq, ",mode=");
2025         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
2026                 seq_puts(seq, "adaptive");
2027         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
2028                 seq_puts(seq, "lfs");
2029         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
2030                 seq_puts(seq, "fragment:segment");
2031         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2032                 seq_puts(seq, "fragment:block");
2033         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
2034         if (test_opt(sbi, RESERVE_ROOT))
2035                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
2036                                 F2FS_OPTION(sbi).root_reserved_blocks,
2037                                 from_kuid_munged(&init_user_ns,
2038                                         F2FS_OPTION(sbi).s_resuid),
2039                                 from_kgid_munged(&init_user_ns,
2040                                         F2FS_OPTION(sbi).s_resgid));
2041         if (F2FS_IO_SIZE_BITS(sbi))
2042                 seq_printf(seq, ",io_bits=%u",
2043                                 F2FS_OPTION(sbi).write_io_size_bits);
2044 #ifdef CONFIG_F2FS_FAULT_INJECTION
2045         if (test_opt(sbi, FAULT_INJECTION)) {
2046                 seq_printf(seq, ",fault_injection=%u",
2047                                 F2FS_OPTION(sbi).fault_info.inject_rate);
2048                 seq_printf(seq, ",fault_type=%u",
2049                                 F2FS_OPTION(sbi).fault_info.inject_type);
2050         }
2051 #endif
2052 #ifdef CONFIG_QUOTA
2053         if (test_opt(sbi, QUOTA))
2054                 seq_puts(seq, ",quota");
2055         if (test_opt(sbi, USRQUOTA))
2056                 seq_puts(seq, ",usrquota");
2057         if (test_opt(sbi, GRPQUOTA))
2058                 seq_puts(seq, ",grpquota");
2059         if (test_opt(sbi, PRJQUOTA))
2060                 seq_puts(seq, ",prjquota");
2061 #endif
2062         f2fs_show_quota_options(seq, sbi->sb);
2063
2064         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2065
2066         if (sbi->sb->s_flags & SB_INLINECRYPT)
2067                 seq_puts(seq, ",inlinecrypt");
2068
2069         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2070                 seq_printf(seq, ",alloc_mode=%s", "default");
2071         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2072                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2073
2074         if (test_opt(sbi, DISABLE_CHECKPOINT))
2075                 seq_printf(seq, ",checkpoint=disable:%u",
2076                                 F2FS_OPTION(sbi).unusable_cap);
2077         if (test_opt(sbi, MERGE_CHECKPOINT))
2078                 seq_puts(seq, ",checkpoint_merge");
2079         else
2080                 seq_puts(seq, ",nocheckpoint_merge");
2081         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2082                 seq_printf(seq, ",fsync_mode=%s", "posix");
2083         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2084                 seq_printf(seq, ",fsync_mode=%s", "strict");
2085         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2086                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2087
2088 #ifdef CONFIG_F2FS_FS_COMPRESSION
2089         f2fs_show_compress_options(seq, sbi->sb);
2090 #endif
2091
2092         if (test_opt(sbi, ATGC))
2093                 seq_puts(seq, ",atgc");
2094
2095         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2096                 seq_printf(seq, ",memory=%s", "normal");
2097         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2098                 seq_printf(seq, ",memory=%s", "low");
2099
2100         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
2101                 seq_printf(seq, ",errors=%s", "remount-ro");
2102         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
2103                 seq_printf(seq, ",errors=%s", "continue");
2104         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
2105                 seq_printf(seq, ",errors=%s", "panic");
2106
2107         return 0;
2108 }
2109
2110 static void default_options(struct f2fs_sb_info *sbi, bool remount)
2111 {
2112         /* init some FS parameters */
2113         if (!remount) {
2114                 set_opt(sbi, READ_EXTENT_CACHE);
2115                 clear_opt(sbi, DISABLE_CHECKPOINT);
2116
2117                 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2118                         set_opt(sbi, DISCARD);
2119
2120                 if (f2fs_sb_has_blkzoned(sbi))
2121                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2122                 else
2123                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2124         }
2125
2126         if (f2fs_sb_has_readonly(sbi))
2127                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2128         else
2129                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2130
2131         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2132         if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2133                                                         SMALL_VOLUME_SEGMENTS)
2134                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2135         else
2136                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2137         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2138         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2139         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2140         if (f2fs_sb_has_compression(sbi)) {
2141                 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2142                 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2143                 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2144                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2145         }
2146         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2147         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2148         F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
2149
2150         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2151
2152         set_opt(sbi, INLINE_XATTR);
2153         set_opt(sbi, INLINE_DATA);
2154         set_opt(sbi, INLINE_DENTRY);
2155         set_opt(sbi, NOHEAP);
2156         set_opt(sbi, MERGE_CHECKPOINT);
2157         F2FS_OPTION(sbi).unusable_cap = 0;
2158         sbi->sb->s_flags |= SB_LAZYTIME;
2159         if (!f2fs_is_readonly(sbi))
2160                 set_opt(sbi, FLUSH_MERGE);
2161         if (f2fs_sb_has_blkzoned(sbi))
2162                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2163         else
2164                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2165
2166 #ifdef CONFIG_F2FS_FS_XATTR
2167         set_opt(sbi, XATTR_USER);
2168 #endif
2169 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2170         set_opt(sbi, POSIX_ACL);
2171 #endif
2172
2173         f2fs_build_fault_attr(sbi, 0, 0);
2174 }
2175
2176 #ifdef CONFIG_QUOTA
2177 static int f2fs_enable_quotas(struct super_block *sb);
2178 #endif
2179
2180 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2181 {
2182         unsigned int s_flags = sbi->sb->s_flags;
2183         struct cp_control cpc;
2184         unsigned int gc_mode = sbi->gc_mode;
2185         int err = 0;
2186         int ret;
2187         block_t unusable;
2188
2189         if (s_flags & SB_RDONLY) {
2190                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2191                 return -EINVAL;
2192         }
2193         sbi->sb->s_flags |= SB_ACTIVE;
2194
2195         /* check if we need more GC first */
2196         unusable = f2fs_get_unusable_blocks(sbi);
2197         if (!f2fs_disable_cp_again(sbi, unusable))
2198                 goto skip_gc;
2199
2200         f2fs_update_time(sbi, DISABLE_TIME);
2201
2202         sbi->gc_mode = GC_URGENT_HIGH;
2203
2204         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2205                 struct f2fs_gc_control gc_control = {
2206                         .victim_segno = NULL_SEGNO,
2207                         .init_gc_type = FG_GC,
2208                         .should_migrate_blocks = false,
2209                         .err_gc_skipped = true,
2210                         .nr_free_secs = 1 };
2211
2212                 f2fs_down_write(&sbi->gc_lock);
2213                 stat_inc_gc_call_count(sbi, FOREGROUND);
2214                 err = f2fs_gc(sbi, &gc_control);
2215                 if (err == -ENODATA) {
2216                         err = 0;
2217                         break;
2218                 }
2219                 if (err && err != -EAGAIN)
2220                         break;
2221         }
2222
2223         ret = sync_filesystem(sbi->sb);
2224         if (ret || err) {
2225                 err = ret ? ret : err;
2226                 goto restore_flag;
2227         }
2228
2229         unusable = f2fs_get_unusable_blocks(sbi);
2230         if (f2fs_disable_cp_again(sbi, unusable)) {
2231                 err = -EAGAIN;
2232                 goto restore_flag;
2233         }
2234
2235 skip_gc:
2236         f2fs_down_write(&sbi->gc_lock);
2237         cpc.reason = CP_PAUSE;
2238         set_sbi_flag(sbi, SBI_CP_DISABLED);
2239         stat_inc_cp_call_count(sbi, TOTAL_CALL);
2240         err = f2fs_write_checkpoint(sbi, &cpc);
2241         if (err)
2242                 goto out_unlock;
2243
2244         spin_lock(&sbi->stat_lock);
2245         sbi->unusable_block_count = unusable;
2246         spin_unlock(&sbi->stat_lock);
2247
2248 out_unlock:
2249         f2fs_up_write(&sbi->gc_lock);
2250 restore_flag:
2251         sbi->gc_mode = gc_mode;
2252         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2253         return err;
2254 }
2255
2256 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2257 {
2258         int retry = DEFAULT_RETRY_IO_COUNT;
2259
2260         /* we should flush all the data to keep data consistency */
2261         do {
2262                 sync_inodes_sb(sbi->sb);
2263                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2264         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2265
2266         if (unlikely(retry < 0))
2267                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2268
2269         f2fs_down_write(&sbi->gc_lock);
2270         f2fs_dirty_to_prefree(sbi);
2271
2272         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2273         set_sbi_flag(sbi, SBI_IS_DIRTY);
2274         f2fs_up_write(&sbi->gc_lock);
2275
2276         f2fs_sync_fs(sbi->sb, 1);
2277
2278         /* Let's ensure there's no pending checkpoint anymore */
2279         f2fs_flush_ckpt_thread(sbi);
2280 }
2281
2282 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2283 {
2284         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2285         struct f2fs_mount_info org_mount_opt;
2286         unsigned long old_sb_flags;
2287         int err;
2288         bool need_restart_gc = false, need_stop_gc = false;
2289         bool need_restart_ckpt = false, need_stop_ckpt = false;
2290         bool need_restart_flush = false, need_stop_flush = false;
2291         bool need_restart_discard = false, need_stop_discard = false;
2292         bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2293         bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2294         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2295         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2296         bool no_atgc = !test_opt(sbi, ATGC);
2297         bool no_discard = !test_opt(sbi, DISCARD);
2298         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2299         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2300 #ifdef CONFIG_QUOTA
2301         int i, j;
2302 #endif
2303
2304         /*
2305          * Save the old mount options in case we
2306          * need to restore them.
2307          */
2308         org_mount_opt = sbi->mount_opt;
2309         old_sb_flags = sb->s_flags;
2310
2311 #ifdef CONFIG_QUOTA
2312         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2313         for (i = 0; i < MAXQUOTAS; i++) {
2314                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2315                         org_mount_opt.s_qf_names[i] =
2316                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2317                                 GFP_KERNEL);
2318                         if (!org_mount_opt.s_qf_names[i]) {
2319                                 for (j = 0; j < i; j++)
2320                                         kfree(org_mount_opt.s_qf_names[j]);
2321                                 return -ENOMEM;
2322                         }
2323                 } else {
2324                         org_mount_opt.s_qf_names[i] = NULL;
2325                 }
2326         }
2327 #endif
2328
2329         /* recover superblocks we couldn't write due to previous RO mount */
2330         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2331                 err = f2fs_commit_super(sbi, false);
2332                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2333                           err);
2334                 if (!err)
2335                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2336         }
2337
2338         default_options(sbi, true);
2339
2340         /* parse mount options */
2341         err = parse_options(sb, data, true);
2342         if (err)
2343                 goto restore_opts;
2344
2345         /* flush outstanding errors before changing fs state */
2346         flush_work(&sbi->s_error_work);
2347
2348         /*
2349          * Previous and new state of filesystem is RO,
2350          * so skip checking GC and FLUSH_MERGE conditions.
2351          */
2352         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2353                 goto skip;
2354
2355         if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
2356                 err = -EROFS;
2357                 goto restore_opts;
2358         }
2359
2360 #ifdef CONFIG_QUOTA
2361         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2362                 err = dquot_suspend(sb, -1);
2363                 if (err < 0)
2364                         goto restore_opts;
2365         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2366                 /* dquot_resume needs RW */
2367                 sb->s_flags &= ~SB_RDONLY;
2368                 if (sb_any_quota_suspended(sb)) {
2369                         dquot_resume(sb, -1);
2370                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2371                         err = f2fs_enable_quotas(sb);
2372                         if (err)
2373                                 goto restore_opts;
2374                 }
2375         }
2376 #endif
2377         if (f2fs_lfs_mode(sbi) && !IS_F2FS_IPU_DISABLE(sbi)) {
2378                 err = -EINVAL;
2379                 f2fs_warn(sbi, "LFS is not compatible with IPU");
2380                 goto restore_opts;
2381         }
2382
2383         /* disallow enable atgc dynamically */
2384         if (no_atgc == !!test_opt(sbi, ATGC)) {
2385                 err = -EINVAL;
2386                 f2fs_warn(sbi, "switch atgc option is not allowed");
2387                 goto restore_opts;
2388         }
2389
2390         /* disallow enable/disable extent_cache dynamically */
2391         if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2392                 err = -EINVAL;
2393                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2394                 goto restore_opts;
2395         }
2396         /* disallow enable/disable age extent_cache dynamically */
2397         if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2398                 err = -EINVAL;
2399                 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2400                 goto restore_opts;
2401         }
2402
2403         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2404                 err = -EINVAL;
2405                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2406                 goto restore_opts;
2407         }
2408
2409         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2410                 err = -EINVAL;
2411                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2412                 goto restore_opts;
2413         }
2414
2415         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2416                 err = -EINVAL;
2417                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2418                 goto restore_opts;
2419         }
2420
2421         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2422                 err = -EINVAL;
2423                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2424                 goto restore_opts;
2425         }
2426
2427         /*
2428          * We stop the GC thread if FS is mounted as RO
2429          * or if background_gc = off is passed in mount
2430          * option. Also sync the filesystem.
2431          */
2432         if ((*flags & SB_RDONLY) ||
2433                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2434                         !test_opt(sbi, GC_MERGE))) {
2435                 if (sbi->gc_thread) {
2436                         f2fs_stop_gc_thread(sbi);
2437                         need_restart_gc = true;
2438                 }
2439         } else if (!sbi->gc_thread) {
2440                 err = f2fs_start_gc_thread(sbi);
2441                 if (err)
2442                         goto restore_opts;
2443                 need_stop_gc = true;
2444         }
2445
2446         if (*flags & SB_RDONLY) {
2447                 sync_inodes_sb(sb);
2448
2449                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2450                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2451                 f2fs_sync_fs(sb, 1);
2452                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2453         }
2454
2455         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2456                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2457                 f2fs_stop_ckpt_thread(sbi);
2458                 need_restart_ckpt = true;
2459         } else {
2460                 /* Flush if the prevous checkpoint, if exists. */
2461                 f2fs_flush_ckpt_thread(sbi);
2462
2463                 err = f2fs_start_ckpt_thread(sbi);
2464                 if (err) {
2465                         f2fs_err(sbi,
2466                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2467                             err);
2468                         goto restore_gc;
2469                 }
2470                 need_stop_ckpt = true;
2471         }
2472
2473         /*
2474          * We stop issue flush thread if FS is mounted as RO
2475          * or if flush_merge is not passed in mount option.
2476          */
2477         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2478                 clear_opt(sbi, FLUSH_MERGE);
2479                 f2fs_destroy_flush_cmd_control(sbi, false);
2480                 need_restart_flush = true;
2481         } else {
2482                 err = f2fs_create_flush_cmd_control(sbi);
2483                 if (err)
2484                         goto restore_ckpt;
2485                 need_stop_flush = true;
2486         }
2487
2488         if (no_discard == !!test_opt(sbi, DISCARD)) {
2489                 if (test_opt(sbi, DISCARD)) {
2490                         err = f2fs_start_discard_thread(sbi);
2491                         if (err)
2492                                 goto restore_flush;
2493                         need_stop_discard = true;
2494                 } else {
2495                         f2fs_stop_discard_thread(sbi);
2496                         f2fs_issue_discard_timeout(sbi);
2497                         need_restart_discard = true;
2498                 }
2499         }
2500
2501         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2502                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2503                         err = f2fs_disable_checkpoint(sbi);
2504                         if (err)
2505                                 goto restore_discard;
2506                 } else {
2507                         f2fs_enable_checkpoint(sbi);
2508                 }
2509         }
2510
2511 skip:
2512 #ifdef CONFIG_QUOTA
2513         /* Release old quota file names */
2514         for (i = 0; i < MAXQUOTAS; i++)
2515                 kfree(org_mount_opt.s_qf_names[i]);
2516 #endif
2517         /* Update the POSIXACL Flag */
2518         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2519                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2520
2521         limit_reserve_root(sbi);
2522         adjust_unusable_cap_perc(sbi);
2523         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2524         return 0;
2525 restore_discard:
2526         if (need_restart_discard) {
2527                 if (f2fs_start_discard_thread(sbi))
2528                         f2fs_warn(sbi, "discard has been stopped");
2529         } else if (need_stop_discard) {
2530                 f2fs_stop_discard_thread(sbi);
2531         }
2532 restore_flush:
2533         if (need_restart_flush) {
2534                 if (f2fs_create_flush_cmd_control(sbi))
2535                         f2fs_warn(sbi, "background flush thread has stopped");
2536         } else if (need_stop_flush) {
2537                 clear_opt(sbi, FLUSH_MERGE);
2538                 f2fs_destroy_flush_cmd_control(sbi, false);
2539         }
2540 restore_ckpt:
2541         if (need_restart_ckpt) {
2542                 if (f2fs_start_ckpt_thread(sbi))
2543                         f2fs_warn(sbi, "background ckpt thread has stopped");
2544         } else if (need_stop_ckpt) {
2545                 f2fs_stop_ckpt_thread(sbi);
2546         }
2547 restore_gc:
2548         if (need_restart_gc) {
2549                 if (f2fs_start_gc_thread(sbi))
2550                         f2fs_warn(sbi, "background gc thread has stopped");
2551         } else if (need_stop_gc) {
2552                 f2fs_stop_gc_thread(sbi);
2553         }
2554 restore_opts:
2555 #ifdef CONFIG_QUOTA
2556         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2557         for (i = 0; i < MAXQUOTAS; i++) {
2558                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2559                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2560         }
2561 #endif
2562         sbi->mount_opt = org_mount_opt;
2563         sb->s_flags = old_sb_flags;
2564         return err;
2565 }
2566
2567 #ifdef CONFIG_QUOTA
2568 static bool f2fs_need_recovery(struct f2fs_sb_info *sbi)
2569 {
2570         /* need to recovery orphan */
2571         if (is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
2572                 return true;
2573         /* need to recovery data */
2574         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2575                 return false;
2576         if (test_opt(sbi, NORECOVERY))
2577                 return false;
2578         return !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG);
2579 }
2580
2581 static bool f2fs_recover_quota_begin(struct f2fs_sb_info *sbi)
2582 {
2583         bool readonly = f2fs_readonly(sbi->sb);
2584
2585         if (!f2fs_need_recovery(sbi))
2586                 return false;
2587
2588         /* it doesn't need to check f2fs_sb_has_readonly() */
2589         if (f2fs_hw_is_readonly(sbi))
2590                 return false;
2591
2592         if (readonly) {
2593                 sbi->sb->s_flags &= ~SB_RDONLY;
2594                 set_sbi_flag(sbi, SBI_IS_WRITABLE);
2595         }
2596
2597         /*
2598          * Turn on quotas which were not enabled for read-only mounts if
2599          * filesystem has quota feature, so that they are updated correctly.
2600          */
2601         return f2fs_enable_quota_files(sbi, readonly);
2602 }
2603
2604 static void f2fs_recover_quota_end(struct f2fs_sb_info *sbi,
2605                                                 bool quota_enabled)
2606 {
2607         if (quota_enabled)
2608                 f2fs_quota_off_umount(sbi->sb);
2609
2610         if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE)) {
2611                 clear_sbi_flag(sbi, SBI_IS_WRITABLE);
2612                 sbi->sb->s_flags |= SB_RDONLY;
2613         }
2614 }
2615
2616 /* Read data from quotafile */
2617 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2618                                size_t len, loff_t off)
2619 {
2620         struct inode *inode = sb_dqopt(sb)->files[type];
2621         struct address_space *mapping = inode->i_mapping;
2622         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2623         int offset = off & (sb->s_blocksize - 1);
2624         int tocopy;
2625         size_t toread;
2626         loff_t i_size = i_size_read(inode);
2627         struct page *page;
2628
2629         if (off > i_size)
2630                 return 0;
2631
2632         if (off + len > i_size)
2633                 len = i_size - off;
2634         toread = len;
2635         while (toread > 0) {
2636                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2637 repeat:
2638                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2639                 if (IS_ERR(page)) {
2640                         if (PTR_ERR(page) == -ENOMEM) {
2641                                 memalloc_retry_wait(GFP_NOFS);
2642                                 goto repeat;
2643                         }
2644                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2645                         return PTR_ERR(page);
2646                 }
2647
2648                 lock_page(page);
2649
2650                 if (unlikely(page->mapping != mapping)) {
2651                         f2fs_put_page(page, 1);
2652                         goto repeat;
2653                 }
2654                 if (unlikely(!PageUptodate(page))) {
2655                         f2fs_put_page(page, 1);
2656                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2657                         return -EIO;
2658                 }
2659
2660                 memcpy_from_page(data, page, offset, tocopy);
2661                 f2fs_put_page(page, 1);
2662
2663                 offset = 0;
2664                 toread -= tocopy;
2665                 data += tocopy;
2666                 blkidx++;
2667         }
2668         return len;
2669 }
2670
2671 /* Write to quotafile */
2672 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2673                                 const char *data, size_t len, loff_t off)
2674 {
2675         struct inode *inode = sb_dqopt(sb)->files[type];
2676         struct address_space *mapping = inode->i_mapping;
2677         const struct address_space_operations *a_ops = mapping->a_ops;
2678         int offset = off & (sb->s_blocksize - 1);
2679         size_t towrite = len;
2680         struct page *page;
2681         void *fsdata = NULL;
2682         int err = 0;
2683         int tocopy;
2684
2685         while (towrite > 0) {
2686                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2687                                                                 towrite);
2688 retry:
2689                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2690                                                         &page, &fsdata);
2691                 if (unlikely(err)) {
2692                         if (err == -ENOMEM) {
2693                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2694                                 goto retry;
2695                         }
2696                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2697                         break;
2698                 }
2699
2700                 memcpy_to_page(page, offset, data, tocopy);
2701
2702                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2703                                                 page, fsdata);
2704                 offset = 0;
2705                 towrite -= tocopy;
2706                 off += tocopy;
2707                 data += tocopy;
2708                 cond_resched();
2709         }
2710
2711         if (len == towrite)
2712                 return err;
2713         inode->i_mtime = inode_set_ctime_current(inode);
2714         f2fs_mark_inode_dirty_sync(inode, false);
2715         return len - towrite;
2716 }
2717
2718 int f2fs_dquot_initialize(struct inode *inode)
2719 {
2720         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT))
2721                 return -ESRCH;
2722
2723         return dquot_initialize(inode);
2724 }
2725
2726 static struct dquot **f2fs_get_dquots(struct inode *inode)
2727 {
2728         return F2FS_I(inode)->i_dquot;
2729 }
2730
2731 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2732 {
2733         return &F2FS_I(inode)->i_reserved_quota;
2734 }
2735
2736 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2737 {
2738         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2739                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2740                 return 0;
2741         }
2742
2743         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2744                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2745 }
2746
2747 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2748 {
2749         int enabled = 0;
2750         int i, err;
2751
2752         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2753                 err = f2fs_enable_quotas(sbi->sb);
2754                 if (err) {
2755                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2756                         return 0;
2757                 }
2758                 return 1;
2759         }
2760
2761         for (i = 0; i < MAXQUOTAS; i++) {
2762                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2763                         err = f2fs_quota_on_mount(sbi, i);
2764                         if (!err) {
2765                                 enabled = 1;
2766                                 continue;
2767                         }
2768                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2769                                  err, i);
2770                 }
2771         }
2772         return enabled;
2773 }
2774
2775 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2776                              unsigned int flags)
2777 {
2778         struct inode *qf_inode;
2779         unsigned long qf_inum;
2780         unsigned long qf_flag = F2FS_QUOTA_DEFAULT_FL;
2781         int err;
2782
2783         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2784
2785         qf_inum = f2fs_qf_ino(sb, type);
2786         if (!qf_inum)
2787                 return -EPERM;
2788
2789         qf_inode = f2fs_iget(sb, qf_inum);
2790         if (IS_ERR(qf_inode)) {
2791                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2792                 return PTR_ERR(qf_inode);
2793         }
2794
2795         /* Don't account quota for quota files to avoid recursion */
2796         inode_lock(qf_inode);
2797         qf_inode->i_flags |= S_NOQUOTA;
2798
2799         if ((F2FS_I(qf_inode)->i_flags & qf_flag) != qf_flag) {
2800                 F2FS_I(qf_inode)->i_flags |= qf_flag;
2801                 f2fs_set_inode_flags(qf_inode);
2802         }
2803         inode_unlock(qf_inode);
2804
2805         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2806         iput(qf_inode);
2807         return err;
2808 }
2809
2810 static int f2fs_enable_quotas(struct super_block *sb)
2811 {
2812         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2813         int type, err = 0;
2814         unsigned long qf_inum;
2815         bool quota_mopt[MAXQUOTAS] = {
2816                 test_opt(sbi, USRQUOTA),
2817                 test_opt(sbi, GRPQUOTA),
2818                 test_opt(sbi, PRJQUOTA),
2819         };
2820
2821         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2822                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2823                 return 0;
2824         }
2825
2826         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2827
2828         for (type = 0; type < MAXQUOTAS; type++) {
2829                 qf_inum = f2fs_qf_ino(sb, type);
2830                 if (qf_inum) {
2831                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2832                                 DQUOT_USAGE_ENABLED |
2833                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2834                         if (err) {
2835                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2836                                          type, err);
2837                                 for (type--; type >= 0; type--)
2838                                         dquot_quota_off(sb, type);
2839                                 set_sbi_flag(F2FS_SB(sb),
2840                                                 SBI_QUOTA_NEED_REPAIR);
2841                                 return err;
2842                         }
2843                 }
2844         }
2845         return 0;
2846 }
2847
2848 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2849 {
2850         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2851         struct address_space *mapping = dqopt->files[type]->i_mapping;
2852         int ret = 0;
2853
2854         ret = dquot_writeback_dquots(sbi->sb, type);
2855         if (ret)
2856                 goto out;
2857
2858         ret = filemap_fdatawrite(mapping);
2859         if (ret)
2860                 goto out;
2861
2862         /* if we are using journalled quota */
2863         if (is_journalled_quota(sbi))
2864                 goto out;
2865
2866         ret = filemap_fdatawait(mapping);
2867
2868         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2869 out:
2870         if (ret)
2871                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2872         return ret;
2873 }
2874
2875 int f2fs_quota_sync(struct super_block *sb, int type)
2876 {
2877         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2878         struct quota_info *dqopt = sb_dqopt(sb);
2879         int cnt;
2880         int ret = 0;
2881
2882         /*
2883          * Now when everything is written we can discard the pagecache so
2884          * that userspace sees the changes.
2885          */
2886         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2887
2888                 if (type != -1 && cnt != type)
2889                         continue;
2890
2891                 if (!sb_has_quota_active(sb, cnt))
2892                         continue;
2893
2894                 if (!f2fs_sb_has_quota_ino(sbi))
2895                         inode_lock(dqopt->files[cnt]);
2896
2897                 /*
2898                  * do_quotactl
2899                  *  f2fs_quota_sync
2900                  *  f2fs_down_read(quota_sem)
2901                  *  dquot_writeback_dquots()
2902                  *  f2fs_dquot_commit
2903                  *                            block_operation
2904                  *                            f2fs_down_read(quota_sem)
2905                  */
2906                 f2fs_lock_op(sbi);
2907                 f2fs_down_read(&sbi->quota_sem);
2908
2909                 ret = f2fs_quota_sync_file(sbi, cnt);
2910
2911                 f2fs_up_read(&sbi->quota_sem);
2912                 f2fs_unlock_op(sbi);
2913
2914                 if (!f2fs_sb_has_quota_ino(sbi))
2915                         inode_unlock(dqopt->files[cnt]);
2916
2917                 if (ret)
2918                         break;
2919         }
2920         return ret;
2921 }
2922
2923 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2924                                                         const struct path *path)
2925 {
2926         struct inode *inode;
2927         int err;
2928
2929         /* if quota sysfile exists, deny enabling quota with specific file */
2930         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2931                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2932                 return -EBUSY;
2933         }
2934
2935         if (path->dentry->d_sb != sb)
2936                 return -EXDEV;
2937
2938         err = f2fs_quota_sync(sb, type);
2939         if (err)
2940                 return err;
2941
2942         inode = d_inode(path->dentry);
2943
2944         err = filemap_fdatawrite(inode->i_mapping);
2945         if (err)
2946                 return err;
2947
2948         err = filemap_fdatawait(inode->i_mapping);
2949         if (err)
2950                 return err;
2951
2952         err = dquot_quota_on(sb, type, format_id, path);
2953         if (err)
2954                 return err;
2955
2956         inode_lock(inode);
2957         F2FS_I(inode)->i_flags |= F2FS_QUOTA_DEFAULT_FL;
2958         f2fs_set_inode_flags(inode);
2959         inode_unlock(inode);
2960         f2fs_mark_inode_dirty_sync(inode, false);
2961
2962         return 0;
2963 }
2964
2965 static int __f2fs_quota_off(struct super_block *sb, int type)
2966 {
2967         struct inode *inode = sb_dqopt(sb)->files[type];
2968         int err;
2969
2970         if (!inode || !igrab(inode))
2971                 return dquot_quota_off(sb, type);
2972
2973         err = f2fs_quota_sync(sb, type);
2974         if (err)
2975                 goto out_put;
2976
2977         err = dquot_quota_off(sb, type);
2978         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2979                 goto out_put;
2980
2981         inode_lock(inode);
2982         F2FS_I(inode)->i_flags &= ~F2FS_QUOTA_DEFAULT_FL;
2983         f2fs_set_inode_flags(inode);
2984         inode_unlock(inode);
2985         f2fs_mark_inode_dirty_sync(inode, false);
2986 out_put:
2987         iput(inode);
2988         return err;
2989 }
2990
2991 static int f2fs_quota_off(struct super_block *sb, int type)
2992 {
2993         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2994         int err;
2995
2996         err = __f2fs_quota_off(sb, type);
2997
2998         /*
2999          * quotactl can shutdown journalled quota, result in inconsistence
3000          * between quota record and fs data by following updates, tag the
3001          * flag to let fsck be aware of it.
3002          */
3003         if (is_journalled_quota(sbi))
3004                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3005         return err;
3006 }
3007
3008 void f2fs_quota_off_umount(struct super_block *sb)
3009 {
3010         int type;
3011         int err;
3012
3013         for (type = 0; type < MAXQUOTAS; type++) {
3014                 err = __f2fs_quota_off(sb, type);
3015                 if (err) {
3016                         int ret = dquot_quota_off(sb, type);
3017
3018                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
3019                                  type, err, ret);
3020                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
3021                 }
3022         }
3023         /*
3024          * In case of checkpoint=disable, we must flush quota blocks.
3025          * This can cause NULL exception for node_inode in end_io, since
3026          * put_super already dropped it.
3027          */
3028         sync_filesystem(sb);
3029 }
3030
3031 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
3032 {
3033         struct quota_info *dqopt = sb_dqopt(sb);
3034         int type;
3035
3036         for (type = 0; type < MAXQUOTAS; type++) {
3037                 if (!dqopt->files[type])
3038                         continue;
3039                 f2fs_inode_synced(dqopt->files[type]);
3040         }
3041 }
3042
3043 static int f2fs_dquot_commit(struct dquot *dquot)
3044 {
3045         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3046         int ret;
3047
3048         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
3049         ret = dquot_commit(dquot);
3050         if (ret < 0)
3051                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3052         f2fs_up_read(&sbi->quota_sem);
3053         return ret;
3054 }
3055
3056 static int f2fs_dquot_acquire(struct dquot *dquot)
3057 {
3058         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3059         int ret;
3060
3061         f2fs_down_read(&sbi->quota_sem);
3062         ret = dquot_acquire(dquot);
3063         if (ret < 0)
3064                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3065         f2fs_up_read(&sbi->quota_sem);
3066         return ret;
3067 }
3068
3069 static int f2fs_dquot_release(struct dquot *dquot)
3070 {
3071         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3072         int ret = dquot_release(dquot);
3073
3074         if (ret < 0)
3075                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3076         return ret;
3077 }
3078
3079 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
3080 {
3081         struct super_block *sb = dquot->dq_sb;
3082         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3083         int ret = dquot_mark_dquot_dirty(dquot);
3084
3085         /* if we are using journalled quota */
3086         if (is_journalled_quota(sbi))
3087                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
3088
3089         return ret;
3090 }
3091
3092 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
3093 {
3094         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3095         int ret = dquot_commit_info(sb, type);
3096
3097         if (ret < 0)
3098                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3099         return ret;
3100 }
3101
3102 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
3103 {
3104         *projid = F2FS_I(inode)->i_projid;
3105         return 0;
3106 }
3107
3108 static const struct dquot_operations f2fs_quota_operations = {
3109         .get_reserved_space = f2fs_get_reserved_space,
3110         .write_dquot    = f2fs_dquot_commit,
3111         .acquire_dquot  = f2fs_dquot_acquire,
3112         .release_dquot  = f2fs_dquot_release,
3113         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
3114         .write_info     = f2fs_dquot_commit_info,
3115         .alloc_dquot    = dquot_alloc,
3116         .destroy_dquot  = dquot_destroy,
3117         .get_projid     = f2fs_get_projid,
3118         .get_next_id    = dquot_get_next_id,
3119 };
3120
3121 static const struct quotactl_ops f2fs_quotactl_ops = {
3122         .quota_on       = f2fs_quota_on,
3123         .quota_off      = f2fs_quota_off,
3124         .quota_sync     = f2fs_quota_sync,
3125         .get_state      = dquot_get_state,
3126         .set_info       = dquot_set_dqinfo,
3127         .get_dqblk      = dquot_get_dqblk,
3128         .set_dqblk      = dquot_set_dqblk,
3129         .get_nextdqblk  = dquot_get_next_dqblk,
3130 };
3131 #else
3132 int f2fs_dquot_initialize(struct inode *inode)
3133 {
3134         return 0;
3135 }
3136
3137 int f2fs_quota_sync(struct super_block *sb, int type)
3138 {
3139         return 0;
3140 }
3141
3142 void f2fs_quota_off_umount(struct super_block *sb)
3143 {
3144 }
3145 #endif
3146
3147 static const struct super_operations f2fs_sops = {
3148         .alloc_inode    = f2fs_alloc_inode,
3149         .free_inode     = f2fs_free_inode,
3150         .drop_inode     = f2fs_drop_inode,
3151         .write_inode    = f2fs_write_inode,
3152         .dirty_inode    = f2fs_dirty_inode,
3153         .show_options   = f2fs_show_options,
3154 #ifdef CONFIG_QUOTA
3155         .quota_read     = f2fs_quota_read,
3156         .quota_write    = f2fs_quota_write,
3157         .get_dquots     = f2fs_get_dquots,
3158 #endif
3159         .evict_inode    = f2fs_evict_inode,
3160         .put_super      = f2fs_put_super,
3161         .sync_fs        = f2fs_sync_fs,
3162         .freeze_fs      = f2fs_freeze,
3163         .unfreeze_fs    = f2fs_unfreeze,
3164         .statfs         = f2fs_statfs,
3165         .remount_fs     = f2fs_remount,
3166 };
3167
3168 #ifdef CONFIG_FS_ENCRYPTION
3169 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3170 {
3171         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3172                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3173                                 ctx, len, NULL);
3174 }
3175
3176 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3177                                                         void *fs_data)
3178 {
3179         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3180
3181         /*
3182          * Encrypting the root directory is not allowed because fsck
3183          * expects lost+found directory to exist and remain unencrypted
3184          * if LOST_FOUND feature is enabled.
3185          *
3186          */
3187         if (f2fs_sb_has_lost_found(sbi) &&
3188                         inode->i_ino == F2FS_ROOT_INO(sbi))
3189                 return -EPERM;
3190
3191         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3192                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3193                                 ctx, len, fs_data, XATTR_CREATE);
3194 }
3195
3196 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3197 {
3198         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3199 }
3200
3201 static bool f2fs_has_stable_inodes(struct super_block *sb)
3202 {
3203         return true;
3204 }
3205
3206 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3207                                        int *ino_bits_ret, int *lblk_bits_ret)
3208 {
3209         *ino_bits_ret = 8 * sizeof(nid_t);
3210         *lblk_bits_ret = 8 * sizeof(block_t);
3211 }
3212
3213 static struct block_device **f2fs_get_devices(struct super_block *sb,
3214                                               unsigned int *num_devs)
3215 {
3216         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3217         struct block_device **devs;
3218         int i;
3219
3220         if (!f2fs_is_multi_device(sbi))
3221                 return NULL;
3222
3223         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3224         if (!devs)
3225                 return ERR_PTR(-ENOMEM);
3226
3227         for (i = 0; i < sbi->s_ndevs; i++)
3228                 devs[i] = FDEV(i).bdev;
3229         *num_devs = sbi->s_ndevs;
3230         return devs;
3231 }
3232
3233 static const struct fscrypt_operations f2fs_cryptops = {
3234         .key_prefix             = "f2fs:",
3235         .get_context            = f2fs_get_context,
3236         .set_context            = f2fs_set_context,
3237         .get_dummy_policy       = f2fs_get_dummy_policy,
3238         .empty_dir              = f2fs_empty_dir,
3239         .has_stable_inodes      = f2fs_has_stable_inodes,
3240         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3241         .get_devices            = f2fs_get_devices,
3242 };
3243 #endif
3244
3245 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3246                 u64 ino, u32 generation)
3247 {
3248         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3249         struct inode *inode;
3250
3251         if (f2fs_check_nid_range(sbi, ino))
3252                 return ERR_PTR(-ESTALE);
3253
3254         /*
3255          * f2fs_iget isn't quite right if the inode is currently unallocated!
3256          * However f2fs_iget currently does appropriate checks to handle stale
3257          * inodes so everything is OK.
3258          */
3259         inode = f2fs_iget(sb, ino);
3260         if (IS_ERR(inode))
3261                 return ERR_CAST(inode);
3262         if (unlikely(generation && inode->i_generation != generation)) {
3263                 /* we didn't find the right inode.. */
3264                 iput(inode);
3265                 return ERR_PTR(-ESTALE);
3266         }
3267         return inode;
3268 }
3269
3270 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3271                 int fh_len, int fh_type)
3272 {
3273         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3274                                     f2fs_nfs_get_inode);
3275 }
3276
3277 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3278                 int fh_len, int fh_type)
3279 {
3280         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3281                                     f2fs_nfs_get_inode);
3282 }
3283
3284 static const struct export_operations f2fs_export_ops = {
3285         .fh_to_dentry = f2fs_fh_to_dentry,
3286         .fh_to_parent = f2fs_fh_to_parent,
3287         .get_parent = f2fs_get_parent,
3288 };
3289
3290 loff_t max_file_blocks(struct inode *inode)
3291 {
3292         loff_t result = 0;
3293         loff_t leaf_count;
3294
3295         /*
3296          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3297          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3298          * space in inode.i_addr, it will be more safe to reassign
3299          * result as zero.
3300          */
3301
3302         if (inode && f2fs_compressed_file(inode))
3303                 leaf_count = ADDRS_PER_BLOCK(inode);
3304         else
3305                 leaf_count = DEF_ADDRS_PER_BLOCK;
3306
3307         /* two direct node blocks */
3308         result += (leaf_count * 2);
3309
3310         /* two indirect node blocks */
3311         leaf_count *= NIDS_PER_BLOCK;
3312         result += (leaf_count * 2);
3313
3314         /* one double indirect node block */
3315         leaf_count *= NIDS_PER_BLOCK;
3316         result += leaf_count;
3317
3318         return result;
3319 }
3320
3321 static int __f2fs_commit_super(struct buffer_head *bh,
3322                         struct f2fs_super_block *super)
3323 {
3324         lock_buffer(bh);
3325         if (super)
3326                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3327         set_buffer_dirty(bh);
3328         unlock_buffer(bh);
3329
3330         /* it's rare case, we can do fua all the time */
3331         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3332 }
3333
3334 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3335                                         struct buffer_head *bh)
3336 {
3337         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3338                                         (bh->b_data + F2FS_SUPER_OFFSET);
3339         struct super_block *sb = sbi->sb;
3340         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3341         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3342         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3343         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3344         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3345         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3346         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3347         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3348         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3349         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3350         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3351         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3352         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3353         u64 main_end_blkaddr = main_blkaddr +
3354                                 (segment_count_main << log_blocks_per_seg);
3355         u64 seg_end_blkaddr = segment0_blkaddr +
3356                                 (segment_count << log_blocks_per_seg);
3357
3358         if (segment0_blkaddr != cp_blkaddr) {
3359                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3360                           segment0_blkaddr, cp_blkaddr);
3361                 return true;
3362         }
3363
3364         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3365                                                         sit_blkaddr) {
3366                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3367                           cp_blkaddr, sit_blkaddr,
3368                           segment_count_ckpt << log_blocks_per_seg);
3369                 return true;
3370         }
3371
3372         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3373                                                         nat_blkaddr) {
3374                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3375                           sit_blkaddr, nat_blkaddr,
3376                           segment_count_sit << log_blocks_per_seg);
3377                 return true;
3378         }
3379
3380         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3381                                                         ssa_blkaddr) {
3382                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3383                           nat_blkaddr, ssa_blkaddr,
3384                           segment_count_nat << log_blocks_per_seg);
3385                 return true;
3386         }
3387
3388         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3389                                                         main_blkaddr) {
3390                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3391                           ssa_blkaddr, main_blkaddr,
3392                           segment_count_ssa << log_blocks_per_seg);
3393                 return true;
3394         }
3395
3396         if (main_end_blkaddr > seg_end_blkaddr) {
3397                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3398                           main_blkaddr, seg_end_blkaddr,
3399                           segment_count_main << log_blocks_per_seg);
3400                 return true;
3401         } else if (main_end_blkaddr < seg_end_blkaddr) {
3402                 int err = 0;
3403                 char *res;
3404
3405                 /* fix in-memory information all the time */
3406                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3407                                 segment0_blkaddr) >> log_blocks_per_seg);
3408
3409                 if (f2fs_readonly(sb) || f2fs_hw_is_readonly(sbi)) {
3410                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3411                         res = "internally";
3412                 } else {
3413                         err = __f2fs_commit_super(bh, NULL);
3414                         res = err ? "failed" : "done";
3415                 }
3416                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3417                           res, main_blkaddr, seg_end_blkaddr,
3418                           segment_count_main << log_blocks_per_seg);
3419                 if (err)
3420                         return true;
3421         }
3422         return false;
3423 }
3424
3425 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3426                                 struct buffer_head *bh)
3427 {
3428         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3429         block_t total_sections, blocks_per_seg;
3430         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3431                                         (bh->b_data + F2FS_SUPER_OFFSET);
3432         size_t crc_offset = 0;
3433         __u32 crc = 0;
3434
3435         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3436                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3437                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3438                 return -EINVAL;
3439         }
3440
3441         /* Check checksum_offset and crc in superblock */
3442         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3443                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3444                 if (crc_offset !=
3445                         offsetof(struct f2fs_super_block, crc)) {
3446                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3447                                   crc_offset);
3448                         return -EFSCORRUPTED;
3449                 }
3450                 crc = le32_to_cpu(raw_super->crc);
3451                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3452                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3453                         return -EFSCORRUPTED;
3454                 }
3455         }
3456
3457         /* Currently, support only 4KB block size */
3458         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3459                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3460                           le32_to_cpu(raw_super->log_blocksize),
3461                           F2FS_BLKSIZE_BITS);
3462                 return -EFSCORRUPTED;
3463         }
3464
3465         /* check log blocks per segment */
3466         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3467                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3468                           le32_to_cpu(raw_super->log_blocks_per_seg));
3469                 return -EFSCORRUPTED;
3470         }
3471
3472         /* Currently, support 512/1024/2048/4096 bytes sector size */
3473         if (le32_to_cpu(raw_super->log_sectorsize) >
3474                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3475                 le32_to_cpu(raw_super->log_sectorsize) <
3476                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3477                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3478                           le32_to_cpu(raw_super->log_sectorsize));
3479                 return -EFSCORRUPTED;
3480         }
3481         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3482                 le32_to_cpu(raw_super->log_sectorsize) !=
3483                         F2FS_MAX_LOG_SECTOR_SIZE) {
3484                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3485                           le32_to_cpu(raw_super->log_sectors_per_block),
3486                           le32_to_cpu(raw_super->log_sectorsize));
3487                 return -EFSCORRUPTED;
3488         }
3489
3490         segment_count = le32_to_cpu(raw_super->segment_count);
3491         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3492         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3493         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3494         total_sections = le32_to_cpu(raw_super->section_count);
3495
3496         /* blocks_per_seg should be 512, given the above check */
3497         blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg));
3498
3499         if (segment_count > F2FS_MAX_SEGMENT ||
3500                                 segment_count < F2FS_MIN_SEGMENTS) {
3501                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3502                 return -EFSCORRUPTED;
3503         }
3504
3505         if (total_sections > segment_count_main || total_sections < 1 ||
3506                         segs_per_sec > segment_count || !segs_per_sec) {
3507                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3508                           segment_count, total_sections, segs_per_sec);
3509                 return -EFSCORRUPTED;
3510         }
3511
3512         if (segment_count_main != total_sections * segs_per_sec) {
3513                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3514                           segment_count_main, total_sections, segs_per_sec);
3515                 return -EFSCORRUPTED;
3516         }
3517
3518         if ((segment_count / segs_per_sec) < total_sections) {
3519                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3520                           segment_count, segs_per_sec, total_sections);
3521                 return -EFSCORRUPTED;
3522         }
3523
3524         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3525                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3526                           segment_count, le64_to_cpu(raw_super->block_count));
3527                 return -EFSCORRUPTED;
3528         }
3529
3530         if (RDEV(0).path[0]) {
3531                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3532                 int i = 1;
3533
3534                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3535                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3536                         i++;
3537                 }
3538                 if (segment_count != dev_seg_count) {
3539                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3540                                         segment_count, dev_seg_count);
3541                         return -EFSCORRUPTED;
3542                 }
3543         } else {
3544                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3545                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3546                         f2fs_info(sbi, "Zoned block device path is missing");
3547                         return -EFSCORRUPTED;
3548                 }
3549         }
3550
3551         if (secs_per_zone > total_sections || !secs_per_zone) {
3552                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3553                           secs_per_zone, total_sections);
3554                 return -EFSCORRUPTED;
3555         }
3556         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3557                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3558                         (le32_to_cpu(raw_super->extension_count) +
3559                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3560                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3561                           le32_to_cpu(raw_super->extension_count),
3562                           raw_super->hot_ext_count,
3563                           F2FS_MAX_EXTENSION);
3564                 return -EFSCORRUPTED;
3565         }
3566
3567         if (le32_to_cpu(raw_super->cp_payload) >=
3568                                 (blocks_per_seg - F2FS_CP_PACKS -
3569                                 NR_CURSEG_PERSIST_TYPE)) {
3570                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3571                           le32_to_cpu(raw_super->cp_payload),
3572                           blocks_per_seg - F2FS_CP_PACKS -
3573                           NR_CURSEG_PERSIST_TYPE);
3574                 return -EFSCORRUPTED;
3575         }
3576
3577         /* check reserved ino info */
3578         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3579                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3580                 le32_to_cpu(raw_super->root_ino) != 3) {
3581                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3582                           le32_to_cpu(raw_super->node_ino),
3583                           le32_to_cpu(raw_super->meta_ino),
3584                           le32_to_cpu(raw_super->root_ino));
3585                 return -EFSCORRUPTED;
3586         }
3587
3588         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3589         if (sanity_check_area_boundary(sbi, bh))
3590                 return -EFSCORRUPTED;
3591
3592         return 0;
3593 }
3594
3595 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3596 {
3597         unsigned int total, fsmeta;
3598         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3599         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3600         unsigned int ovp_segments, reserved_segments;
3601         unsigned int main_segs, blocks_per_seg;
3602         unsigned int sit_segs, nat_segs;
3603         unsigned int sit_bitmap_size, nat_bitmap_size;
3604         unsigned int log_blocks_per_seg;
3605         unsigned int segment_count_main;
3606         unsigned int cp_pack_start_sum, cp_payload;
3607         block_t user_block_count, valid_user_blocks;
3608         block_t avail_node_count, valid_node_count;
3609         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3610         int i, j;
3611
3612         total = le32_to_cpu(raw_super->segment_count);
3613         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3614         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3615         fsmeta += sit_segs;
3616         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3617         fsmeta += nat_segs;
3618         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3619         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3620
3621         if (unlikely(fsmeta >= total))
3622                 return 1;
3623
3624         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3625         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3626
3627         if (!f2fs_sb_has_readonly(sbi) &&
3628                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3629                         ovp_segments == 0 || reserved_segments == 0)) {
3630                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3631                 return 1;
3632         }
3633         user_block_count = le64_to_cpu(ckpt->user_block_count);
3634         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3635                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3636         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3637         if (!user_block_count || user_block_count >=
3638                         segment_count_main << log_blocks_per_seg) {
3639                 f2fs_err(sbi, "Wrong user_block_count: %u",
3640                          user_block_count);
3641                 return 1;
3642         }
3643
3644         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3645         if (valid_user_blocks > user_block_count) {
3646                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3647                          valid_user_blocks, user_block_count);
3648                 return 1;
3649         }
3650
3651         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3652         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3653         if (valid_node_count > avail_node_count) {
3654                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3655                          valid_node_count, avail_node_count);
3656                 return 1;
3657         }
3658
3659         main_segs = le32_to_cpu(raw_super->segment_count_main);
3660         blocks_per_seg = sbi->blocks_per_seg;
3661
3662         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3663                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3664                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3665                         return 1;
3666
3667                 if (f2fs_sb_has_readonly(sbi))
3668                         goto check_data;
3669
3670                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3671                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3672                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3673                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3674                                          i, j,
3675                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3676                                 return 1;
3677                         }
3678                 }
3679         }
3680 check_data:
3681         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3682                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3683                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3684                         return 1;
3685
3686                 if (f2fs_sb_has_readonly(sbi))
3687                         goto skip_cross;
3688
3689                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3690                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3691                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3692                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3693                                          i, j,
3694                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3695                                 return 1;
3696                         }
3697                 }
3698         }
3699         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3700                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3701                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3702                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3703                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3704                                          i, j,
3705                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3706                                 return 1;
3707                         }
3708                 }
3709         }
3710 skip_cross:
3711         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3712         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3713
3714         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3715                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3716                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3717                          sit_bitmap_size, nat_bitmap_size);
3718                 return 1;
3719         }
3720
3721         cp_pack_start_sum = __start_sum_addr(sbi);
3722         cp_payload = __cp_payload(sbi);
3723         if (cp_pack_start_sum < cp_payload + 1 ||
3724                 cp_pack_start_sum > blocks_per_seg - 1 -
3725                         NR_CURSEG_PERSIST_TYPE) {
3726                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3727                          cp_pack_start_sum);
3728                 return 1;
3729         }
3730
3731         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3732                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3733                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3734                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3735                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3736                           le32_to_cpu(ckpt->checksum_offset));
3737                 return 1;
3738         }
3739
3740         nat_blocks = nat_segs << log_blocks_per_seg;
3741         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3742         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3743         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3744                 (cp_payload + F2FS_CP_PACKS +
3745                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3746                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3747                           cp_payload, nat_bits_blocks);
3748                 return 1;
3749         }
3750
3751         if (unlikely(f2fs_cp_error(sbi))) {
3752                 f2fs_err(sbi, "A bug case: need to run fsck");
3753                 return 1;
3754         }
3755         return 0;
3756 }
3757
3758 static void init_sb_info(struct f2fs_sb_info *sbi)
3759 {
3760         struct f2fs_super_block *raw_super = sbi->raw_super;
3761         int i;
3762
3763         sbi->log_sectors_per_block =
3764                 le32_to_cpu(raw_super->log_sectors_per_block);
3765         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3766         sbi->blocksize = BIT(sbi->log_blocksize);
3767         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3768         sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg);
3769         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3770         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3771         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3772         sbi->total_node_count =
3773                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3774                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3775         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3776         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3777         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3778         sbi->cur_victim_sec = NULL_SECNO;
3779         sbi->gc_mode = GC_NORMAL;
3780         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3781         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3782         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3783         sbi->migration_granularity = sbi->segs_per_sec;
3784         sbi->seq_file_ra_mul = MIN_RA_MUL;
3785         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3786         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3787         spin_lock_init(&sbi->gc_remaining_trials_lock);
3788         atomic64_set(&sbi->current_atomic_write, 0);
3789
3790         sbi->dir_level = DEF_DIR_LEVEL;
3791         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3792         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3793         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3794         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3795         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3796         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3797                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3798         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3799
3800         for (i = 0; i < NR_COUNT_TYPE; i++)
3801                 atomic_set(&sbi->nr_pages[i], 0);
3802
3803         for (i = 0; i < META; i++)
3804                 atomic_set(&sbi->wb_sync_req[i], 0);
3805
3806         INIT_LIST_HEAD(&sbi->s_list);
3807         mutex_init(&sbi->umount_mutex);
3808         init_f2fs_rwsem(&sbi->io_order_lock);
3809         spin_lock_init(&sbi->cp_lock);
3810
3811         sbi->dirty_device = 0;
3812         spin_lock_init(&sbi->dev_lock);
3813
3814         init_f2fs_rwsem(&sbi->sb_lock);
3815         init_f2fs_rwsem(&sbi->pin_sem);
3816 }
3817
3818 static int init_percpu_info(struct f2fs_sb_info *sbi)
3819 {
3820         int err;
3821
3822         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3823         if (err)
3824                 return err;
3825
3826         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3827         if (err)
3828                 goto err_valid_block;
3829
3830         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3831                                                                 GFP_KERNEL);
3832         if (err)
3833                 goto err_node_block;
3834         return 0;
3835
3836 err_node_block:
3837         percpu_counter_destroy(&sbi->rf_node_block_count);
3838 err_valid_block:
3839         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3840         return err;
3841 }
3842
3843 #ifdef CONFIG_BLK_DEV_ZONED
3844
3845 struct f2fs_report_zones_args {
3846         struct f2fs_sb_info *sbi;
3847         struct f2fs_dev_info *dev;
3848 };
3849
3850 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3851                               void *data)
3852 {
3853         struct f2fs_report_zones_args *rz_args = data;
3854         block_t unusable_blocks = (zone->len - zone->capacity) >>
3855                                         F2FS_LOG_SECTORS_PER_BLOCK;
3856
3857         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3858                 return 0;
3859
3860         set_bit(idx, rz_args->dev->blkz_seq);
3861         if (!rz_args->sbi->unusable_blocks_per_sec) {
3862                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3863                 return 0;
3864         }
3865         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3866                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3867                 return -EINVAL;
3868         }
3869         return 0;
3870 }
3871
3872 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3873 {
3874         struct block_device *bdev = FDEV(devi).bdev;
3875         sector_t nr_sectors = bdev_nr_sectors(bdev);
3876         struct f2fs_report_zones_args rep_zone_arg;
3877         u64 zone_sectors;
3878         int ret;
3879
3880         if (!f2fs_sb_has_blkzoned(sbi))
3881                 return 0;
3882
3883         zone_sectors = bdev_zone_sectors(bdev);
3884         if (!is_power_of_2(zone_sectors)) {
3885                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3886                 return -EINVAL;
3887         }
3888
3889         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3890                                 SECTOR_TO_BLOCK(zone_sectors))
3891                 return -EINVAL;
3892         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3893         FDEV(devi).nr_blkz = div_u64(SECTOR_TO_BLOCK(nr_sectors),
3894                                         sbi->blocks_per_blkz);
3895         if (nr_sectors & (zone_sectors - 1))
3896                 FDEV(devi).nr_blkz++;
3897
3898         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3899                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3900                                         * sizeof(unsigned long),
3901                                         GFP_KERNEL);
3902         if (!FDEV(devi).blkz_seq)
3903                 return -ENOMEM;
3904
3905         rep_zone_arg.sbi = sbi;
3906         rep_zone_arg.dev = &FDEV(devi);
3907
3908         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3909                                   &rep_zone_arg);
3910         if (ret < 0)
3911                 return ret;
3912         return 0;
3913 }
3914 #endif
3915
3916 /*
3917  * Read f2fs raw super block.
3918  * Because we have two copies of super block, so read both of them
3919  * to get the first valid one. If any one of them is broken, we pass
3920  * them recovery flag back to the caller.
3921  */
3922 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3923                         struct f2fs_super_block **raw_super,
3924                         int *valid_super_block, int *recovery)
3925 {
3926         struct super_block *sb = sbi->sb;
3927         int block;
3928         struct buffer_head *bh;
3929         struct f2fs_super_block *super;
3930         int err = 0;
3931
3932         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3933         if (!super)
3934                 return -ENOMEM;
3935
3936         for (block = 0; block < 2; block++) {
3937                 bh = sb_bread(sb, block);
3938                 if (!bh) {
3939                         f2fs_err(sbi, "Unable to read %dth superblock",
3940                                  block + 1);
3941                         err = -EIO;
3942                         *recovery = 1;
3943                         continue;
3944                 }
3945
3946                 /* sanity checking of raw super */
3947                 err = sanity_check_raw_super(sbi, bh);
3948                 if (err) {
3949                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3950                                  block + 1);
3951                         brelse(bh);
3952                         *recovery = 1;
3953                         continue;
3954                 }
3955
3956                 if (!*raw_super) {
3957                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3958                                                         sizeof(*super));
3959                         *valid_super_block = block;
3960                         *raw_super = super;
3961                 }
3962                 brelse(bh);
3963         }
3964
3965         /* No valid superblock */
3966         if (!*raw_super)
3967                 kfree(super);
3968         else
3969                 err = 0;
3970
3971         return err;
3972 }
3973
3974 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3975 {
3976         struct buffer_head *bh;
3977         __u32 crc = 0;
3978         int err;
3979
3980         if ((recover && f2fs_readonly(sbi->sb)) ||
3981                                 f2fs_hw_is_readonly(sbi)) {
3982                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3983                 return -EROFS;
3984         }
3985
3986         /* we should update superblock crc here */
3987         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3988                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3989                                 offsetof(struct f2fs_super_block, crc));
3990                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3991         }
3992
3993         /* write back-up superblock first */
3994         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3995         if (!bh)
3996                 return -EIO;
3997         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3998         brelse(bh);
3999
4000         /* if we are in recovery path, skip writing valid superblock */
4001         if (recover || err)
4002                 return err;
4003
4004         /* write current valid superblock */
4005         bh = sb_bread(sbi->sb, sbi->valid_super_block);
4006         if (!bh)
4007                 return -EIO;
4008         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
4009         brelse(bh);
4010         return err;
4011 }
4012
4013 static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
4014 {
4015         unsigned long flags;
4016
4017         spin_lock_irqsave(&sbi->error_lock, flags);
4018         if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
4019                 sbi->stop_reason[reason]++;
4020         spin_unlock_irqrestore(&sbi->error_lock, flags);
4021 }
4022
4023 static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
4024 {
4025         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4026         unsigned long flags;
4027         int err;
4028
4029         f2fs_down_write(&sbi->sb_lock);
4030
4031         spin_lock_irqsave(&sbi->error_lock, flags);
4032         if (sbi->error_dirty) {
4033                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4034                                                         MAX_F2FS_ERRORS);
4035                 sbi->error_dirty = false;
4036         }
4037         memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
4038         spin_unlock_irqrestore(&sbi->error_lock, flags);
4039
4040         err = f2fs_commit_super(sbi, false);
4041
4042         f2fs_up_write(&sbi->sb_lock);
4043         if (err)
4044                 f2fs_err(sbi, "f2fs_commit_super fails to record err:%d", err);
4045 }
4046
4047 void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
4048 {
4049         unsigned long flags;
4050
4051         spin_lock_irqsave(&sbi->error_lock, flags);
4052         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
4053                 set_bit(flag, (unsigned long *)sbi->errors);
4054                 sbi->error_dirty = true;
4055         }
4056         spin_unlock_irqrestore(&sbi->error_lock, flags);
4057 }
4058
4059 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
4060 {
4061         unsigned long flags;
4062         bool need_update = false;
4063
4064         spin_lock_irqsave(&sbi->error_lock, flags);
4065         if (sbi->error_dirty) {
4066                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4067                                                         MAX_F2FS_ERRORS);
4068                 sbi->error_dirty = false;
4069                 need_update = true;
4070         }
4071         spin_unlock_irqrestore(&sbi->error_lock, flags);
4072
4073         return need_update;
4074 }
4075
4076 static void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error)
4077 {
4078         int err;
4079
4080         f2fs_down_write(&sbi->sb_lock);
4081
4082         if (!f2fs_update_errors(sbi))
4083                 goto out_unlock;
4084
4085         err = f2fs_commit_super(sbi, false);
4086         if (err)
4087                 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d",
4088                                                                 error, err);
4089 out_unlock:
4090         f2fs_up_write(&sbi->sb_lock);
4091 }
4092
4093 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
4094 {
4095         f2fs_save_errors(sbi, error);
4096         f2fs_record_errors(sbi, error);
4097 }
4098
4099 void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error)
4100 {
4101         f2fs_save_errors(sbi, error);
4102
4103         if (!sbi->error_dirty)
4104                 return;
4105         if (!test_bit(error, (unsigned long *)sbi->errors))
4106                 return;
4107         schedule_work(&sbi->s_error_work);
4108 }
4109
4110 static bool system_going_down(void)
4111 {
4112         return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
4113                 || system_state == SYSTEM_RESTART;
4114 }
4115
4116 void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
4117                                                         bool irq_context)
4118 {
4119         struct super_block *sb = sbi->sb;
4120         bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
4121         bool continue_fs = !shutdown &&
4122                         F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
4123
4124         set_ckpt_flags(sbi, CP_ERROR_FLAG);
4125
4126         if (!f2fs_hw_is_readonly(sbi)) {
4127                 save_stop_reason(sbi, reason);
4128
4129                 if (irq_context && !shutdown)
4130                         schedule_work(&sbi->s_error_work);
4131                 else
4132                         f2fs_record_stop_reason(sbi);
4133         }
4134
4135         /*
4136          * We force ERRORS_RO behavior when system is rebooting. Otherwise we
4137          * could panic during 'reboot -f' as the underlying device got already
4138          * disabled.
4139          */
4140         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
4141                                 !shutdown && !system_going_down() &&
4142                                 !is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN))
4143                 panic("F2FS-fs (device %s): panic forced after error\n",
4144                                                         sb->s_id);
4145
4146         if (shutdown)
4147                 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
4148
4149         /* continue filesystem operators if errors=continue */
4150         if (continue_fs || f2fs_readonly(sb))
4151                 return;
4152
4153         f2fs_warn(sbi, "Remounting filesystem read-only");
4154         /*
4155          * Make sure updated value of ->s_mount_flags will be visible before
4156          * ->s_flags update
4157          */
4158         smp_wmb();
4159         sb->s_flags |= SB_RDONLY;
4160 }
4161
4162 static void f2fs_record_error_work(struct work_struct *work)
4163 {
4164         struct f2fs_sb_info *sbi = container_of(work,
4165                                         struct f2fs_sb_info, s_error_work);
4166
4167         f2fs_record_stop_reason(sbi);
4168 }
4169
4170 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
4171 {
4172         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4173         unsigned int max_devices = MAX_DEVICES;
4174         unsigned int logical_blksize;
4175         blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
4176         int i;
4177
4178         /* Initialize single device information */
4179         if (!RDEV(0).path[0]) {
4180                 if (!bdev_is_zoned(sbi->sb->s_bdev))
4181                         return 0;
4182                 max_devices = 1;
4183         }
4184
4185         /*
4186          * Initialize multiple devices information, or single
4187          * zoned block device information.
4188          */
4189         sbi->devs = f2fs_kzalloc(sbi,
4190                                  array_size(max_devices,
4191                                             sizeof(struct f2fs_dev_info)),
4192                                  GFP_KERNEL);
4193         if (!sbi->devs)
4194                 return -ENOMEM;
4195
4196         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
4197         sbi->aligned_blksize = true;
4198
4199         for (i = 0; i < max_devices; i++) {
4200                 if (i == 0)
4201                         FDEV(0).bdev = sbi->sb->s_bdev;
4202                 else if (!RDEV(i).path[0])
4203                         break;
4204
4205                 if (max_devices > 1) {
4206                         /* Multi-device mount */
4207                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
4208                         FDEV(i).total_segments =
4209                                 le32_to_cpu(RDEV(i).total_segments);
4210                         if (i == 0) {
4211                                 FDEV(i).start_blk = 0;
4212                                 FDEV(i).end_blk = FDEV(i).start_blk +
4213                                     (FDEV(i).total_segments <<
4214                                     sbi->log_blocks_per_seg) - 1 +
4215                                     le32_to_cpu(raw_super->segment0_blkaddr);
4216                         } else {
4217                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
4218                                 FDEV(i).end_blk = FDEV(i).start_blk +
4219                                         (FDEV(i).total_segments <<
4220                                         sbi->log_blocks_per_seg) - 1;
4221                                 FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
4222                                         mode, sbi->sb, NULL);
4223                         }
4224                 }
4225                 if (IS_ERR(FDEV(i).bdev))
4226                         return PTR_ERR(FDEV(i).bdev);
4227
4228                 /* to release errored devices */
4229                 sbi->s_ndevs = i + 1;
4230
4231                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4232                         sbi->aligned_blksize = false;
4233
4234 #ifdef CONFIG_BLK_DEV_ZONED
4235                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
4236                                 !f2fs_sb_has_blkzoned(sbi)) {
4237                         f2fs_err(sbi, "Zoned block device feature not enabled");
4238                         return -EINVAL;
4239                 }
4240                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
4241                         if (init_blkz_info(sbi, i)) {
4242                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
4243                                 return -EINVAL;
4244                         }
4245                         if (max_devices == 1)
4246                                 break;
4247                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
4248                                   i, FDEV(i).path,
4249                                   FDEV(i).total_segments,
4250                                   FDEV(i).start_blk, FDEV(i).end_blk,
4251                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
4252                                   "Host-aware" : "Host-managed");
4253                         continue;
4254                 }
4255 #endif
4256                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4257                           i, FDEV(i).path,
4258                           FDEV(i).total_segments,
4259                           FDEV(i).start_blk, FDEV(i).end_blk);
4260         }
4261         f2fs_info(sbi,
4262                   "IO Block Size: %8ld KB", F2FS_IO_SIZE_KB(sbi));
4263         return 0;
4264 }
4265
4266 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4267 {
4268 #if IS_ENABLED(CONFIG_UNICODE)
4269         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4270                 const struct f2fs_sb_encodings *encoding_info;
4271                 struct unicode_map *encoding;
4272                 __u16 encoding_flags;
4273
4274                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4275                 if (!encoding_info) {
4276                         f2fs_err(sbi,
4277                                  "Encoding requested by superblock is unknown");
4278                         return -EINVAL;
4279                 }
4280
4281                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4282                 encoding = utf8_load(encoding_info->version);
4283                 if (IS_ERR(encoding)) {
4284                         f2fs_err(sbi,
4285                                  "can't mount with superblock charset: %s-%u.%u.%u "
4286                                  "not supported by the kernel. flags: 0x%x.",
4287                                  encoding_info->name,
4288                                  unicode_major(encoding_info->version),
4289                                  unicode_minor(encoding_info->version),
4290                                  unicode_rev(encoding_info->version),
4291                                  encoding_flags);
4292                         return PTR_ERR(encoding);
4293                 }
4294                 f2fs_info(sbi, "Using encoding defined by superblock: "
4295                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4296                          unicode_major(encoding_info->version),
4297                          unicode_minor(encoding_info->version),
4298                          unicode_rev(encoding_info->version),
4299                          encoding_flags);
4300
4301                 sbi->sb->s_encoding = encoding;
4302                 sbi->sb->s_encoding_flags = encoding_flags;
4303         }
4304 #else
4305         if (f2fs_sb_has_casefold(sbi)) {
4306                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4307                 return -EINVAL;
4308         }
4309 #endif
4310         return 0;
4311 }
4312
4313 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4314 {
4315         /* adjust parameters according to the volume size */
4316         if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4317                 if (f2fs_block_unit_discard(sbi))
4318                         SM_I(sbi)->dcc_info->discard_granularity =
4319                                                 MIN_DISCARD_GRANULARITY;
4320                 if (!f2fs_lfs_mode(sbi))
4321                         SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4322                                                 BIT(F2FS_IPU_HONOR_OPU_WRITE);
4323         }
4324
4325         sbi->readdir_ra = true;
4326 }
4327
4328 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4329 {
4330         struct f2fs_sb_info *sbi;
4331         struct f2fs_super_block *raw_super;
4332         struct inode *root;
4333         int err;
4334         bool skip_recovery = false, need_fsck = false;
4335         char *options = NULL;
4336         int recovery, i, valid_super_block;
4337         struct curseg_info *seg_i;
4338         int retry_cnt = 1;
4339 #ifdef CONFIG_QUOTA
4340         bool quota_enabled = false;
4341 #endif
4342
4343 try_onemore:
4344         err = -EINVAL;
4345         raw_super = NULL;
4346         valid_super_block = -1;
4347         recovery = 0;
4348
4349         /* allocate memory for f2fs-specific super block info */
4350         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4351         if (!sbi)
4352                 return -ENOMEM;
4353
4354         sbi->sb = sb;
4355
4356         /* initialize locks within allocated memory */
4357         init_f2fs_rwsem(&sbi->gc_lock);
4358         mutex_init(&sbi->writepages);
4359         init_f2fs_rwsem(&sbi->cp_global_sem);
4360         init_f2fs_rwsem(&sbi->node_write);
4361         init_f2fs_rwsem(&sbi->node_change);
4362         spin_lock_init(&sbi->stat_lock);
4363         init_f2fs_rwsem(&sbi->cp_rwsem);
4364         init_f2fs_rwsem(&sbi->quota_sem);
4365         init_waitqueue_head(&sbi->cp_wait);
4366         spin_lock_init(&sbi->error_lock);
4367
4368         for (i = 0; i < NR_INODE_TYPE; i++) {
4369                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4370                 spin_lock_init(&sbi->inode_lock[i]);
4371         }
4372         mutex_init(&sbi->flush_lock);
4373
4374         /* Load the checksum driver */
4375         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4376         if (IS_ERR(sbi->s_chksum_driver)) {
4377                 f2fs_err(sbi, "Cannot load crc32 driver.");
4378                 err = PTR_ERR(sbi->s_chksum_driver);
4379                 sbi->s_chksum_driver = NULL;
4380                 goto free_sbi;
4381         }
4382
4383         /* set a block size */
4384         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4385                 f2fs_err(sbi, "unable to set blocksize");
4386                 goto free_sbi;
4387         }
4388
4389         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4390                                                                 &recovery);
4391         if (err)
4392                 goto free_sbi;
4393
4394         sb->s_fs_info = sbi;
4395         sbi->raw_super = raw_super;
4396
4397         INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
4398         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4399         memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
4400
4401         /* precompute checksum seed for metadata */
4402         if (f2fs_sb_has_inode_chksum(sbi))
4403                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4404                                                 sizeof(raw_super->uuid));
4405
4406         default_options(sbi, false);
4407         /* parse mount options */
4408         options = kstrdup((const char *)data, GFP_KERNEL);
4409         if (data && !options) {
4410                 err = -ENOMEM;
4411                 goto free_sb_buf;
4412         }
4413
4414         err = parse_options(sb, options, false);
4415         if (err)
4416                 goto free_options;
4417
4418         sb->s_maxbytes = max_file_blocks(NULL) <<
4419                                 le32_to_cpu(raw_super->log_blocksize);
4420         sb->s_max_links = F2FS_LINK_MAX;
4421
4422         err = f2fs_setup_casefold(sbi);
4423         if (err)
4424                 goto free_options;
4425
4426 #ifdef CONFIG_QUOTA
4427         sb->dq_op = &f2fs_quota_operations;
4428         sb->s_qcop = &f2fs_quotactl_ops;
4429         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4430
4431         if (f2fs_sb_has_quota_ino(sbi)) {
4432                 for (i = 0; i < MAXQUOTAS; i++) {
4433                         if (f2fs_qf_ino(sbi->sb, i))
4434                                 sbi->nquota_files++;
4435                 }
4436         }
4437 #endif
4438
4439         sb->s_op = &f2fs_sops;
4440 #ifdef CONFIG_FS_ENCRYPTION
4441         sb->s_cop = &f2fs_cryptops;
4442 #endif
4443 #ifdef CONFIG_FS_VERITY
4444         sb->s_vop = &f2fs_verityops;
4445 #endif
4446         sb->s_xattr = f2fs_xattr_handlers;
4447         sb->s_export_op = &f2fs_export_ops;
4448         sb->s_magic = F2FS_SUPER_MAGIC;
4449         sb->s_time_gran = 1;
4450         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4451                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4452         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4453         sb->s_iflags |= SB_I_CGROUPWB;
4454
4455         /* init f2fs-specific super block info */
4456         sbi->valid_super_block = valid_super_block;
4457
4458         /* disallow all the data/node/meta page writes */
4459         set_sbi_flag(sbi, SBI_POR_DOING);
4460
4461         err = f2fs_init_write_merge_io(sbi);
4462         if (err)
4463                 goto free_bio_info;
4464
4465         init_sb_info(sbi);
4466
4467         err = f2fs_init_iostat(sbi);
4468         if (err)
4469                 goto free_bio_info;
4470
4471         err = init_percpu_info(sbi);
4472         if (err)
4473                 goto free_iostat;
4474
4475         if (F2FS_IO_ALIGNED(sbi)) {
4476                 sbi->write_io_dummy =
4477                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4478                 if (!sbi->write_io_dummy) {
4479                         err = -ENOMEM;
4480                         goto free_percpu;
4481                 }
4482         }
4483
4484         /* init per sbi slab cache */
4485         err = f2fs_init_xattr_caches(sbi);
4486         if (err)
4487                 goto free_io_dummy;
4488         err = f2fs_init_page_array_cache(sbi);
4489         if (err)
4490                 goto free_xattr_cache;
4491
4492         /* get an inode for meta space */
4493         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4494         if (IS_ERR(sbi->meta_inode)) {
4495                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4496                 err = PTR_ERR(sbi->meta_inode);
4497                 goto free_page_array_cache;
4498         }
4499
4500         err = f2fs_get_valid_checkpoint(sbi);
4501         if (err) {
4502                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4503                 goto free_meta_inode;
4504         }
4505
4506         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4507                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4508         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4509                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4510                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4511         }
4512
4513         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4514                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4515
4516         /* Initialize device list */
4517         err = f2fs_scan_devices(sbi);
4518         if (err) {
4519                 f2fs_err(sbi, "Failed to find devices");
4520                 goto free_devices;
4521         }
4522
4523         err = f2fs_init_post_read_wq(sbi);
4524         if (err) {
4525                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4526                 goto free_devices;
4527         }
4528
4529         sbi->total_valid_node_count =
4530                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4531         percpu_counter_set(&sbi->total_valid_inode_count,
4532                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4533         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4534         sbi->total_valid_block_count =
4535                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4536         sbi->last_valid_block_count = sbi->total_valid_block_count;
4537         sbi->reserved_blocks = 0;
4538         sbi->current_reserved_blocks = 0;
4539         limit_reserve_root(sbi);
4540         adjust_unusable_cap_perc(sbi);
4541
4542         f2fs_init_extent_cache_info(sbi);
4543
4544         f2fs_init_ino_entry_info(sbi);
4545
4546         f2fs_init_fsync_node_info(sbi);
4547
4548         /* setup checkpoint request control and start checkpoint issue thread */
4549         f2fs_init_ckpt_req_control(sbi);
4550         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4551                         test_opt(sbi, MERGE_CHECKPOINT)) {
4552                 err = f2fs_start_ckpt_thread(sbi);
4553                 if (err) {
4554                         f2fs_err(sbi,
4555                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4556                             err);
4557                         goto stop_ckpt_thread;
4558                 }
4559         }
4560
4561         /* setup f2fs internal modules */
4562         err = f2fs_build_segment_manager(sbi);
4563         if (err) {
4564                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4565                          err);
4566                 goto free_sm;
4567         }
4568         err = f2fs_build_node_manager(sbi);
4569         if (err) {
4570                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4571                          err);
4572                 goto free_nm;
4573         }
4574
4575         err = adjust_reserved_segment(sbi);
4576         if (err)
4577                 goto free_nm;
4578
4579         /* For write statistics */
4580         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4581
4582         /* Read accumulated write IO statistics if exists */
4583         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4584         if (__exist_node_summaries(sbi))
4585                 sbi->kbytes_written =
4586                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4587
4588         f2fs_build_gc_manager(sbi);
4589
4590         err = f2fs_build_stats(sbi);
4591         if (err)
4592                 goto free_nm;
4593
4594         /* get an inode for node space */
4595         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4596         if (IS_ERR(sbi->node_inode)) {
4597                 f2fs_err(sbi, "Failed to read node inode");
4598                 err = PTR_ERR(sbi->node_inode);
4599                 goto free_stats;
4600         }
4601
4602         /* read root inode and dentry */
4603         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4604         if (IS_ERR(root)) {
4605                 f2fs_err(sbi, "Failed to read root inode");
4606                 err = PTR_ERR(root);
4607                 goto free_node_inode;
4608         }
4609         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4610                         !root->i_size || !root->i_nlink) {
4611                 iput(root);
4612                 err = -EINVAL;
4613                 goto free_node_inode;
4614         }
4615
4616         sb->s_root = d_make_root(root); /* allocate root dentry */
4617         if (!sb->s_root) {
4618                 err = -ENOMEM;
4619                 goto free_node_inode;
4620         }
4621
4622         err = f2fs_init_compress_inode(sbi);
4623         if (err)
4624                 goto free_root_inode;
4625
4626         err = f2fs_register_sysfs(sbi);
4627         if (err)
4628                 goto free_compress_inode;
4629
4630 #ifdef CONFIG_QUOTA
4631         /* Enable quota usage during mount */
4632         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4633                 err = f2fs_enable_quotas(sb);
4634                 if (err)
4635                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4636         }
4637
4638         quota_enabled = f2fs_recover_quota_begin(sbi);
4639 #endif
4640         /* if there are any orphan inodes, free them */
4641         err = f2fs_recover_orphan_inodes(sbi);
4642         if (err)
4643                 goto free_meta;
4644
4645         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4646                 goto reset_checkpoint;
4647
4648         /* recover fsynced data */
4649         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4650                         !test_opt(sbi, NORECOVERY)) {
4651                 /*
4652                  * mount should be failed, when device has readonly mode, and
4653                  * previous checkpoint was not done by clean system shutdown.
4654                  */
4655                 if (f2fs_hw_is_readonly(sbi)) {
4656                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4657                                 err = f2fs_recover_fsync_data(sbi, true);
4658                                 if (err > 0) {
4659                                         err = -EROFS;
4660                                         f2fs_err(sbi, "Need to recover fsync data, but "
4661                                                 "write access unavailable, please try "
4662                                                 "mount w/ disable_roll_forward or norecovery");
4663                                 }
4664                                 if (err < 0)
4665                                         goto free_meta;
4666                         }
4667                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4668                         goto reset_checkpoint;
4669                 }
4670
4671                 if (need_fsck)
4672                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4673
4674                 if (skip_recovery)
4675                         goto reset_checkpoint;
4676
4677                 err = f2fs_recover_fsync_data(sbi, false);
4678                 if (err < 0) {
4679                         if (err != -ENOMEM)
4680                                 skip_recovery = true;
4681                         need_fsck = true;
4682                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4683                                  err);
4684                         goto free_meta;
4685                 }
4686         } else {
4687                 err = f2fs_recover_fsync_data(sbi, true);
4688
4689                 if (!f2fs_readonly(sb) && err > 0) {
4690                         err = -EINVAL;
4691                         f2fs_err(sbi, "Need to recover fsync data");
4692                         goto free_meta;
4693                 }
4694         }
4695
4696 #ifdef CONFIG_QUOTA
4697         f2fs_recover_quota_end(sbi, quota_enabled);
4698 #endif
4699
4700         /*
4701          * If the f2fs is not readonly and fsync data recovery succeeds,
4702          * check zoned block devices' write pointer consistency.
4703          */
4704         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4705                 err = f2fs_check_write_pointer(sbi);
4706                 if (err)
4707                         goto free_meta;
4708         }
4709
4710 reset_checkpoint:
4711         f2fs_init_inmem_curseg(sbi);
4712
4713         /* f2fs_recover_fsync_data() cleared this already */
4714         clear_sbi_flag(sbi, SBI_POR_DOING);
4715
4716         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4717                 err = f2fs_disable_checkpoint(sbi);
4718                 if (err)
4719                         goto sync_free_meta;
4720         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4721                 f2fs_enable_checkpoint(sbi);
4722         }
4723
4724         /*
4725          * If filesystem is not mounted as read-only then
4726          * do start the gc_thread.
4727          */
4728         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4729                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4730                 /* After POR, we can run background GC thread.*/
4731                 err = f2fs_start_gc_thread(sbi);
4732                 if (err)
4733                         goto sync_free_meta;
4734         }
4735         kvfree(options);
4736
4737         /* recover broken superblock */
4738         if (recovery) {
4739                 err = f2fs_commit_super(sbi, true);
4740                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4741                           sbi->valid_super_block ? 1 : 2, err);
4742         }
4743
4744         f2fs_join_shrinker(sbi);
4745
4746         f2fs_tuning_parameters(sbi);
4747
4748         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4749                     cur_cp_version(F2FS_CKPT(sbi)));
4750         f2fs_update_time(sbi, CP_TIME);
4751         f2fs_update_time(sbi, REQ_TIME);
4752         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4753         return 0;
4754
4755 sync_free_meta:
4756         /* safe to flush all the data */
4757         sync_filesystem(sbi->sb);
4758         retry_cnt = 0;
4759
4760 free_meta:
4761 #ifdef CONFIG_QUOTA
4762         f2fs_truncate_quota_inode_pages(sb);
4763         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4764                 f2fs_quota_off_umount(sbi->sb);
4765 #endif
4766         /*
4767          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4768          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4769          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4770          * falls into an infinite loop in f2fs_sync_meta_pages().
4771          */
4772         truncate_inode_pages_final(META_MAPPING(sbi));
4773         /* evict some inodes being cached by GC */
4774         evict_inodes(sb);
4775         f2fs_unregister_sysfs(sbi);
4776 free_compress_inode:
4777         f2fs_destroy_compress_inode(sbi);
4778 free_root_inode:
4779         dput(sb->s_root);
4780         sb->s_root = NULL;
4781 free_node_inode:
4782         f2fs_release_ino_entry(sbi, true);
4783         truncate_inode_pages_final(NODE_MAPPING(sbi));
4784         iput(sbi->node_inode);
4785         sbi->node_inode = NULL;
4786 free_stats:
4787         f2fs_destroy_stats(sbi);
4788 free_nm:
4789         /* stop discard thread before destroying node manager */
4790         f2fs_stop_discard_thread(sbi);
4791         f2fs_destroy_node_manager(sbi);
4792 free_sm:
4793         f2fs_destroy_segment_manager(sbi);
4794 stop_ckpt_thread:
4795         f2fs_stop_ckpt_thread(sbi);
4796         /* flush s_error_work before sbi destroy */
4797         flush_work(&sbi->s_error_work);
4798         f2fs_destroy_post_read_wq(sbi);
4799 free_devices:
4800         destroy_device_list(sbi);
4801         kvfree(sbi->ckpt);
4802 free_meta_inode:
4803         make_bad_inode(sbi->meta_inode);
4804         iput(sbi->meta_inode);
4805         sbi->meta_inode = NULL;
4806 free_page_array_cache:
4807         f2fs_destroy_page_array_cache(sbi);
4808 free_xattr_cache:
4809         f2fs_destroy_xattr_caches(sbi);
4810 free_io_dummy:
4811         mempool_destroy(sbi->write_io_dummy);
4812 free_percpu:
4813         destroy_percpu_info(sbi);
4814 free_iostat:
4815         f2fs_destroy_iostat(sbi);
4816 free_bio_info:
4817         for (i = 0; i < NR_PAGE_TYPE; i++)
4818                 kvfree(sbi->write_io[i]);
4819
4820 #if IS_ENABLED(CONFIG_UNICODE)
4821         utf8_unload(sb->s_encoding);
4822         sb->s_encoding = NULL;
4823 #endif
4824 free_options:
4825 #ifdef CONFIG_QUOTA
4826         for (i = 0; i < MAXQUOTAS; i++)
4827                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4828 #endif
4829         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4830         kvfree(options);
4831 free_sb_buf:
4832         kfree(raw_super);
4833 free_sbi:
4834         if (sbi->s_chksum_driver)
4835                 crypto_free_shash(sbi->s_chksum_driver);
4836         kfree(sbi);
4837
4838         /* give only one another chance */
4839         if (retry_cnt > 0 && skip_recovery) {
4840                 retry_cnt--;
4841                 shrink_dcache_sb(sb);
4842                 goto try_onemore;
4843         }
4844         return err;
4845 }
4846
4847 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4848                         const char *dev_name, void *data)
4849 {
4850         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4851 }
4852
4853 static void kill_f2fs_super(struct super_block *sb)
4854 {
4855         if (sb->s_root) {
4856                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4857
4858                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4859                 f2fs_stop_gc_thread(sbi);
4860                 f2fs_stop_discard_thread(sbi);
4861
4862 #ifdef CONFIG_F2FS_FS_COMPRESSION
4863                 /*
4864                  * latter evict_inode() can bypass checking and invalidating
4865                  * compress inode cache.
4866                  */
4867                 if (test_opt(sbi, COMPRESS_CACHE))
4868                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4869 #endif
4870
4871                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4872                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4873                         struct cp_control cpc = {
4874                                 .reason = CP_UMOUNT,
4875                         };
4876                         stat_inc_cp_call_count(sbi, TOTAL_CALL);
4877                         f2fs_write_checkpoint(sbi, &cpc);
4878                 }
4879
4880                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4881                         sb->s_flags &= ~SB_RDONLY;
4882         }
4883         kill_block_super(sb);
4884 }
4885
4886 static struct file_system_type f2fs_fs_type = {
4887         .owner          = THIS_MODULE,
4888         .name           = "f2fs",
4889         .mount          = f2fs_mount,
4890         .kill_sb        = kill_f2fs_super,
4891         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4892 };
4893 MODULE_ALIAS_FS("f2fs");
4894
4895 static int __init init_inodecache(void)
4896 {
4897         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4898                         sizeof(struct f2fs_inode_info), 0,
4899                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4900         return f2fs_inode_cachep ? 0 : -ENOMEM;
4901 }
4902
4903 static void destroy_inodecache(void)
4904 {
4905         /*
4906          * Make sure all delayed rcu free inodes are flushed before we
4907          * destroy cache.
4908          */
4909         rcu_barrier();
4910         kmem_cache_destroy(f2fs_inode_cachep);
4911 }
4912
4913 static int __init init_f2fs_fs(void)
4914 {
4915         int err;
4916
4917         if (PAGE_SIZE != F2FS_BLKSIZE) {
4918                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4919                                 PAGE_SIZE, F2FS_BLKSIZE);
4920                 return -EINVAL;
4921         }
4922
4923         err = init_inodecache();
4924         if (err)
4925                 goto fail;
4926         err = f2fs_create_node_manager_caches();
4927         if (err)
4928                 goto free_inodecache;
4929         err = f2fs_create_segment_manager_caches();
4930         if (err)
4931                 goto free_node_manager_caches;
4932         err = f2fs_create_checkpoint_caches();
4933         if (err)
4934                 goto free_segment_manager_caches;
4935         err = f2fs_create_recovery_cache();
4936         if (err)
4937                 goto free_checkpoint_caches;
4938         err = f2fs_create_extent_cache();
4939         if (err)
4940                 goto free_recovery_cache;
4941         err = f2fs_create_garbage_collection_cache();
4942         if (err)
4943                 goto free_extent_cache;
4944         err = f2fs_init_sysfs();
4945         if (err)
4946                 goto free_garbage_collection_cache;
4947         err = register_shrinker(&f2fs_shrinker_info, "f2fs-shrinker");
4948         if (err)
4949                 goto free_sysfs;
4950         err = register_filesystem(&f2fs_fs_type);
4951         if (err)
4952                 goto free_shrinker;
4953         f2fs_create_root_stats();
4954         err = f2fs_init_post_read_processing();
4955         if (err)
4956                 goto free_root_stats;
4957         err = f2fs_init_iostat_processing();
4958         if (err)
4959                 goto free_post_read;
4960         err = f2fs_init_bio_entry_cache();
4961         if (err)
4962                 goto free_iostat;
4963         err = f2fs_init_bioset();
4964         if (err)
4965                 goto free_bio_entry_cache;
4966         err = f2fs_init_compress_mempool();
4967         if (err)
4968                 goto free_bioset;
4969         err = f2fs_init_compress_cache();
4970         if (err)
4971                 goto free_compress_mempool;
4972         err = f2fs_create_casefold_cache();
4973         if (err)
4974                 goto free_compress_cache;
4975         return 0;
4976 free_compress_cache:
4977         f2fs_destroy_compress_cache();
4978 free_compress_mempool:
4979         f2fs_destroy_compress_mempool();
4980 free_bioset:
4981         f2fs_destroy_bioset();
4982 free_bio_entry_cache:
4983         f2fs_destroy_bio_entry_cache();
4984 free_iostat:
4985         f2fs_destroy_iostat_processing();
4986 free_post_read:
4987         f2fs_destroy_post_read_processing();
4988 free_root_stats:
4989         f2fs_destroy_root_stats();
4990         unregister_filesystem(&f2fs_fs_type);
4991 free_shrinker:
4992         unregister_shrinker(&f2fs_shrinker_info);
4993 free_sysfs:
4994         f2fs_exit_sysfs();
4995 free_garbage_collection_cache:
4996         f2fs_destroy_garbage_collection_cache();
4997 free_extent_cache:
4998         f2fs_destroy_extent_cache();
4999 free_recovery_cache:
5000         f2fs_destroy_recovery_cache();
5001 free_checkpoint_caches:
5002         f2fs_destroy_checkpoint_caches();
5003 free_segment_manager_caches:
5004         f2fs_destroy_segment_manager_caches();
5005 free_node_manager_caches:
5006         f2fs_destroy_node_manager_caches();
5007 free_inodecache:
5008         destroy_inodecache();
5009 fail:
5010         return err;
5011 }
5012
5013 static void __exit exit_f2fs_fs(void)
5014 {
5015         f2fs_destroy_casefold_cache();
5016         f2fs_destroy_compress_cache();
5017         f2fs_destroy_compress_mempool();
5018         f2fs_destroy_bioset();
5019         f2fs_destroy_bio_entry_cache();
5020         f2fs_destroy_iostat_processing();
5021         f2fs_destroy_post_read_processing();
5022         f2fs_destroy_root_stats();
5023         unregister_filesystem(&f2fs_fs_type);
5024         unregister_shrinker(&f2fs_shrinker_info);
5025         f2fs_exit_sysfs();
5026         f2fs_destroy_garbage_collection_cache();
5027         f2fs_destroy_extent_cache();
5028         f2fs_destroy_recovery_cache();
5029         f2fs_destroy_checkpoint_caches();
5030         f2fs_destroy_segment_manager_caches();
5031         f2fs_destroy_node_manager_caches();
5032         destroy_inodecache();
5033 }
5034
5035 module_init(init_f2fs_fs)
5036 module_exit(exit_f2fs_fs)
5037
5038 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
5039 MODULE_DESCRIPTION("Flash Friendly File System");
5040 MODULE_LICENSE("GPL");
5041 MODULE_SOFTDEP("pre: crc32");
5042