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
  88 static int __init f2fs_init_shrinker(void)
  89 {
  90         f2fs_shrinker_info = shrinker_alloc(0, "f2fs-shrinker");
  91         if (!f2fs_shrinker_info)
  92                 return -ENOMEM;
  93
  94         f2fs_shrinker_info->count_objects = f2fs_shrink_count;
  95         f2fs_shrinker_info->scan_objects = f2fs_shrink_scan;
  96
  97         shrinker_register(f2fs_shrinker_info);
  98
  99         return 0;
 100 }
 101
 102 static void f2fs_exit_shrinker(void)
 103 {
 104         shrinker_free(f2fs_shrinker_info);
 105 }
 106
 107 enum {
 108         Opt_gc_background,
 109         Opt_disable_roll_forward,
 110         Opt_norecovery,
 111         Opt_discard,
 112         Opt_nodiscard,
 113         Opt_noheap,
 114         Opt_heap,
 115         Opt_user_xattr,
 116         Opt_nouser_xattr,
 117         Opt_acl,
 118         Opt_noacl,
 119         Opt_active_logs,
 120         Opt_disable_ext_identify,
 121         Opt_inline_xattr,
 122         Opt_noinline_xattr,
 123         Opt_inline_xattr_size,
 124         Opt_inline_data,
 125         Opt_inline_dentry,
 126         Opt_noinline_dentry,
 127         Opt_flush_merge,
 128         Opt_noflush_merge,
 129         Opt_barrier,
 130         Opt_nobarrier,
 131         Opt_fastboot,
 132         Opt_extent_cache,
 133         Opt_noextent_cache,
 134         Opt_noinline_data,
 135         Opt_data_flush,
 136         Opt_reserve_root,
 137         Opt_resgid,
 138         Opt_resuid,
 139         Opt_mode,
 140         Opt_io_size_bits,
 141         Opt_fault_injection,
 142         Opt_fault_type,
 143         Opt_lazytime,
 144         Opt_nolazytime,
 145         Opt_quota,
 146         Opt_noquota,
 147         Opt_usrquota,
 148         Opt_grpquota,
 149         Opt_prjquota,
 150         Opt_usrjquota,
 151         Opt_grpjquota,
 152         Opt_prjjquota,
 153         Opt_offusrjquota,
 154         Opt_offgrpjquota,
 155         Opt_offprjjquota,
 156         Opt_jqfmt_vfsold,
 157         Opt_jqfmt_vfsv0,
 158         Opt_jqfmt_vfsv1,
 159         Opt_alloc,
 160         Opt_fsync,
 161         Opt_test_dummy_encryption,
 162         Opt_inlinecrypt,
 163         Opt_checkpoint_disable,
 164         Opt_checkpoint_disable_cap,
 165         Opt_checkpoint_disable_cap_perc,
 166         Opt_checkpoint_enable,
 167         Opt_checkpoint_merge,
 168         Opt_nocheckpoint_merge,
 169         Opt_compress_algorithm,
 170         Opt_compress_log_size,
 171         Opt_compress_extension,
 172         Opt_nocompress_extension,
 173         Opt_compress_chksum,
 174         Opt_compress_mode,
 175         Opt_compress_cache,
 176         Opt_atgc,
 177         Opt_gc_merge,
 178         Opt_nogc_merge,
 179         Opt_discard_unit,
 180         Opt_memory_mode,
 181         Opt_age_extent_cache,
 182         Opt_errors,
 183         Opt_err,
 184 };
 185
 186 static match_table_t f2fs_tokens = {
 187         {Opt_gc_background, "background_gc=%s"},
 188         {Opt_disable_roll_forward, "disable_roll_forward"},
 189         {Opt_norecovery, "norecovery"},
 190         {Opt_discard, "discard"},
 191         {Opt_nodiscard, "nodiscard"},
 192         {Opt_noheap, "no_heap"},
 193         {Opt_heap, "heap"},
 194         {Opt_user_xattr, "user_xattr"},
 195         {Opt_nouser_xattr, "nouser_xattr"},
 196         {Opt_acl, "acl"},
 197         {Opt_noacl, "noacl"},
 198         {Opt_active_logs, "active_logs=%u"},
 199         {Opt_disable_ext_identify, "disable_ext_identify"},
 200         {Opt_inline_xattr, "inline_xattr"},
 201         {Opt_noinline_xattr, "noinline_xattr"},
 202         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 203         {Opt_inline_data, "inline_data"},
 204         {Opt_inline_dentry, "inline_dentry"},
 205         {Opt_noinline_dentry, "noinline_dentry"},
 206         {Opt_flush_merge, "flush_merge"},
 207         {Opt_noflush_merge, "noflush_merge"},
 208         {Opt_barrier, "barrier"},
 209         {Opt_nobarrier, "nobarrier"},
 210         {Opt_fastboot, "fastboot"},
 211         {Opt_extent_cache, "extent_cache"},
 212         {Opt_noextent_cache, "noextent_cache"},
 213         {Opt_noinline_data, "noinline_data"},
 214         {Opt_data_flush, "data_flush"},
 215         {Opt_reserve_root, "reserve_root=%u"},
 216         {Opt_resgid, "resgid=%u"},
 217         {Opt_resuid, "resuid=%u"},
 218         {Opt_mode, "mode=%s"},
 219         {Opt_io_size_bits, "io_bits=%u"},
 220         {Opt_fault_injection, "fault_injection=%u"},
 221         {Opt_fault_type, "fault_type=%u"},
 222         {Opt_lazytime, "lazytime"},
 223         {Opt_nolazytime, "nolazytime"},
 224         {Opt_quota, "quota"},
 225         {Opt_noquota, "noquota"},
 226         {Opt_usrquota, "usrquota"},
 227         {Opt_grpquota, "grpquota"},
 228         {Opt_prjquota, "prjquota"},
 229         {Opt_usrjquota, "usrjquota=%s"},
 230         {Opt_grpjquota, "grpjquota=%s"},
 231         {Opt_prjjquota, "prjjquota=%s"},
 232         {Opt_offusrjquota, "usrjquota="},
 233         {Opt_offgrpjquota, "grpjquota="},
 234         {Opt_offprjjquota, "prjjquota="},
 235         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 236         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 237         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 238         {Opt_alloc, "alloc_mode=%s"},
 239         {Opt_fsync, "fsync_mode=%s"},
 240         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 241         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 242         {Opt_inlinecrypt, "inlinecrypt"},
 243         {Opt_checkpoint_disable, "checkpoint=disable"},
 244         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 245         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 246         {Opt_checkpoint_enable, "checkpoint=enable"},
 247         {Opt_checkpoint_merge, "checkpoint_merge"},
 248         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 249         {Opt_compress_algorithm, "compress_algorithm=%s"},
 250         {Opt_compress_log_size, "compress_log_size=%u"},
 251         {Opt_compress_extension, "compress_extension=%s"},
 252         {Opt_nocompress_extension, "nocompress_extension=%s"},
 253         {Opt_compress_chksum, "compress_chksum"},
 254         {Opt_compress_mode, "compress_mode=%s"},
 255         {Opt_compress_cache, "compress_cache"},
 256         {Opt_atgc, "atgc"},
 257         {Opt_gc_merge, "gc_merge"},
 258         {Opt_nogc_merge, "nogc_merge"},
 259         {Opt_discard_unit, "discard_unit=%s"},
 260         {Opt_memory_mode, "memory=%s"},
 261         {Opt_age_extent_cache, "age_extent_cache"},
 262         {Opt_errors, "errors=%s"},
 263         {Opt_err, NULL},
 264 };
 265
 266 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 267 {
 268         struct va_format vaf;
 269         va_list args;
 270         int level;
 271
 272         va_start(args, fmt);
 273
 274         level = printk_get_level(fmt);
 275         vaf.fmt = printk_skip_level(fmt);
 276         vaf.va = &args;
 277         printk("%c%cF2FS-fs (%s): %pV\n",
 278                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 279
 280         va_end(args);
 281 }
 282
 283 #if IS_ENABLED(CONFIG_UNICODE)
 284 static const struct f2fs_sb_encodings {
 285         __u16 magic;
 286         char *name;
 287         unsigned int version;
 288 } f2fs_sb_encoding_map[] = {
 289         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 290 };
 291
 292 static const struct f2fs_sb_encodings *
 293 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 294 {
 295         __u16 magic = le16_to_cpu(sb->s_encoding);
 296         int i;
 297
 298         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 299                 if (magic == f2fs_sb_encoding_map[i].magic)
 300                         return &f2fs_sb_encoding_map[i];
 301
 302         return NULL;
 303 }
 304
 305 struct kmem_cache *f2fs_cf_name_slab;
 306 static int __init f2fs_create_casefold_cache(void)
 307 {
 308         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 309                                                         F2FS_NAME_LEN);
 310         return f2fs_cf_name_slab ? 0 : -ENOMEM;
 311 }
 312
 313 static void f2fs_destroy_casefold_cache(void)
 314 {
 315         kmem_cache_destroy(f2fs_cf_name_slab);
 316 }
 317 #else
 318 static int __init f2fs_create_casefold_cache(void) { return 0; }
 319 static void f2fs_destroy_casefold_cache(void) { }
 320 #endif
 321
 322 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 323 {
 324         block_t limit = min((sbi->user_block_count >> 3),
 325                         sbi->user_block_count - sbi->reserved_blocks);
 326
 327         /* limit is 12.5% */
 328         if (test_opt(sbi, RESERVE_ROOT) &&
 329                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 330                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 331                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 332                           F2FS_OPTION(sbi).root_reserved_blocks);
 333         }
 334         if (!test_opt(sbi, RESERVE_ROOT) &&
 335                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 336                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 337                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 338                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 339                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 340                           from_kuid_munged(&init_user_ns,
 341                                            F2FS_OPTION(sbi).s_resuid),
 342                           from_kgid_munged(&init_user_ns,
 343                                            F2FS_OPTION(sbi).s_resgid));
 344 }
 345
 346 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 347 {
 348         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 349         unsigned int avg_vblocks;
 350         unsigned int wanted_reserved_segments;
 351         block_t avail_user_block_count;
 352
 353         if (!F2FS_IO_ALIGNED(sbi))
 354                 return 0;
 355
 356         /* average valid block count in section in worst case */
 357         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 358
 359         /*
 360          * we need enough free space when migrating one section in worst case
 361          */
 362         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 363                                                 reserved_segments(sbi);
 364         wanted_reserved_segments -= reserved_segments(sbi);
 365
 366         avail_user_block_count = sbi->user_block_count -
 367                                 sbi->current_reserved_blocks -
 368                                 F2FS_OPTION(sbi).root_reserved_blocks;
 369
 370         if (wanted_reserved_segments * sbi->blocks_per_seg >
 371                                         avail_user_block_count) {
 372                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 373                         wanted_reserved_segments,
 374                         avail_user_block_count >> sbi->log_blocks_per_seg);
 375                 return -ENOSPC;
 376         }
 377
 378         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 379
 380         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 381                          wanted_reserved_segments);
 382
 383         return 0;
 384 }
 385
 386 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 387 {
 388         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 389                 return;
 390
 391         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 392                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 393         else
 394                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 395                                         F2FS_OPTION(sbi).unusable_cap_perc;
 396
 397         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 398                         F2FS_OPTION(sbi).unusable_cap,
 399                         F2FS_OPTION(sbi).unusable_cap_perc);
 400 }
 401
 402 static void init_once(void *foo)
 403 {
 404         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 405
 406         inode_init_once(&fi->vfs_inode);
 407 }
 408
 409 #ifdef CONFIG_QUOTA
 410 static const char * const quotatypes[] = INITQFNAMES;
 411 #define QTYPE2NAME(t) (quotatypes[t])
 412 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 413                                                         substring_t *args)
 414 {
 415         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 416         char *qname;
 417         int ret = -EINVAL;
 418
 419         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 420                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 421                 return -EINVAL;
 422         }
 423         if (f2fs_sb_has_quota_ino(sbi)) {
 424                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 425                 return 0;
 426         }
 427
 428         qname = match_strdup(args);
 429         if (!qname) {
 430                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 431                 return -ENOMEM;
 432         }
 433         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 434                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 435                         ret = 0;
 436                 else
 437                         f2fs_err(sbi, "%s quota file already specified",
 438                                  QTYPE2NAME(qtype));
 439                 goto errout;
 440         }
 441         if (strchr(qname, '/')) {
 442                 f2fs_err(sbi, "quotafile must be on filesystem root");
 443                 goto errout;
 444         }
 445         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 446         set_opt(sbi, QUOTA);
 447         return 0;
 448 errout:
 449         kfree(qname);
 450         return ret;
 451 }
 452
 453 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 454 {
 455         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 456
 457         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 458                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 459                 return -EINVAL;
 460         }
 461         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 462         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 463         return 0;
 464 }
 465
 466 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 467 {
 468         /*
 469          * We do the test below only for project quotas. 'usrquota' and
 470          * 'grpquota' mount options are allowed even without quota feature
 471          * to support legacy quotas in quota files.
 472          */
 473         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 474                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 475                 return -1;
 476         }
 477         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 478                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 479                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 480                 if (test_opt(sbi, USRQUOTA) &&
 481                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 482                         clear_opt(sbi, USRQUOTA);
 483
 484                 if (test_opt(sbi, GRPQUOTA) &&
 485                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 486                         clear_opt(sbi, GRPQUOTA);
 487
 488                 if (test_opt(sbi, PRJQUOTA) &&
 489                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 490                         clear_opt(sbi, PRJQUOTA);
 491
 492                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 493                                 test_opt(sbi, PRJQUOTA)) {
 494                         f2fs_err(sbi, "old and new quota format mixing");
 495                         return -1;
 496                 }
 497
 498                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 499                         f2fs_err(sbi, "journaled quota format not specified");
 500                         return -1;
 501                 }
 502         }
 503
 504         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 505                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 506                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 507         }
 508         return 0;
 509 }
 510 #endif
 511
 512 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 513                                           const char *opt,
 514                                           const substring_t *arg,
 515                                           bool is_remount)
 516 {
 517         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 518         struct fs_parameter param = {
 519                 .type = fs_value_is_string,
 520                 .string = arg->from ? arg->from : "",
 521         };
 522         struct fscrypt_dummy_policy *policy =
 523                 &F2FS_OPTION(sbi).dummy_enc_policy;
 524         int err;
 525
 526         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 527                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 528                 return -EINVAL;
 529         }
 530
 531         if (!f2fs_sb_has_encrypt(sbi)) {
 532                 f2fs_err(sbi, "Encrypt feature is off");
 533                 return -EINVAL;
 534         }
 535
 536         /*
 537          * This mount option is just for testing, and it's not worthwhile to
 538          * implement the extra complexity (e.g. RCU protection) that would be
 539          * needed to allow it to be set or changed during remount.  We do allow
 540          * it to be specified during remount, but only if there is no change.
 541          */
 542         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 543                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 544                 return -EINVAL;
 545         }
 546
 547         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 548         if (err) {
 549                 if (err == -EEXIST)
 550                         f2fs_warn(sbi,
 551                                   "Can't change test_dummy_encryption on remount");
 552                 else if (err == -EINVAL)
 553                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 554                                   opt);
 555                 else
 556                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 557                                   opt, err);
 558                 return -EINVAL;
 559         }
 560         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 561         return 0;
 562 }
 563
 564 #ifdef CONFIG_F2FS_FS_COMPRESSION
 565 static bool is_compress_extension_exist(struct f2fs_sb_info *sbi,
 566                                         const char *new_ext, bool is_ext)
 567 {
 568         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 569         int ext_cnt;
 570         int i;
 571
 572         if (is_ext) {
 573                 ext = F2FS_OPTION(sbi).extensions;
 574                 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 575         } else {
 576                 ext = F2FS_OPTION(sbi).noextensions;
 577                 ext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 578         }
 579
 580         for (i = 0; i < ext_cnt; i++) {
 581                 if (!strcasecmp(new_ext, ext[i]))
 582                         return true;
 583         }
 584
 585         return false;
 586 }
 587
 588 /*
 589  * 1. The same extension name cannot not appear in both compress and non-compress extension
 590  * at the same time.
 591  * 2. If the compress extension specifies all files, the types specified by the non-compress
 592  * extension will be treated as special cases and will not be compressed.
 593  * 3. Don't allow the non-compress extension specifies all files.
 594  */
 595 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 596 {
 597         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 598         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 599         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 600
 601         ext = F2FS_OPTION(sbi).extensions;
 602         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 603         noext = F2FS_OPTION(sbi).noextensions;
 604         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 605
 606         if (!noext_cnt)
 607                 return 0;
 608
 609         for (no_index = 0; no_index < noext_cnt; no_index++) {
 610                 if (!strcasecmp("*", noext[no_index])) {
 611                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 612                         return -EINVAL;
 613                 }
 614                 for (index = 0; index < ext_cnt; index++) {
 615                         if (!strcasecmp(ext[index], noext[no_index])) {
 616                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 617                                                 ext[index]);
 618                                 return -EINVAL;
 619                         }
 620                 }
 621         }
 622         return 0;
 623 }
 624
 625 #ifdef CONFIG_F2FS_FS_LZ4
 626 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 627 {
 628 #ifdef CONFIG_F2FS_FS_LZ4HC
 629         unsigned int level;
 630
 631         if (strlen(str) == 3) {
 632                 F2FS_OPTION(sbi).compress_level = 0;
 633                 return 0;
 634         }
 635
 636         str += 3;
 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_LZ4, level)) {
 646                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 647                 return -EINVAL;
 648         }
 649
 650         F2FS_OPTION(sbi).compress_level = level;
 651         return 0;
 652 #else
 653         if (strlen(str) == 3) {
 654                 F2FS_OPTION(sbi).compress_level = 0;
 655                 return 0;
 656         }
 657         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 658         return -EINVAL;
 659 #endif
 660 }
 661 #endif
 662
 663 #ifdef CONFIG_F2FS_FS_ZSTD
 664 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 665 {
 666         unsigned int level;
 667         int len = 4;
 668
 669         if (strlen(str) == len) {
 670                 F2FS_OPTION(sbi).compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
 671                 return 0;
 672         }
 673
 674         str += len;
 675
 676         if (str[0] != ':') {
 677                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 678                 return -EINVAL;
 679         }
 680         if (kstrtouint(str + 1, 10, &level))
 681                 return -EINVAL;
 682
 683         if (!f2fs_is_compress_level_valid(COMPRESS_ZSTD, level)) {
 684                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 685                 return -EINVAL;
 686         }
 687
 688         F2FS_OPTION(sbi).compress_level = level;
 689         return 0;
 690 }
 691 #endif
 692 #endif
 693
 694 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 695 {
 696         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 697         substring_t args[MAX_OPT_ARGS];
 698 #ifdef CONFIG_F2FS_FS_COMPRESSION
 699         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 700         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 701         int ext_cnt, noext_cnt;
 702 #endif
 703         char *p, *name;
 704         int arg = 0;
 705         kuid_t uid;
 706         kgid_t gid;
 707         int ret;
 708
 709         if (!options)
 710                 goto default_check;
 711
 712         while ((p = strsep(&options, ",")) != NULL) {
 713                 int token;
 714
 715                 if (!*p)
 716                         continue;
 717                 /*
 718                  * Initialize args struct so we know whether arg was
 719                  * found; some options take optional arguments.
 720                  */
 721                 args[0].to = args[0].from = NULL;
 722                 token = match_token(p, f2fs_tokens, args);
 723
 724                 switch (token) {
 725                 case Opt_gc_background:
 726                         name = match_strdup(&args[0]);
 727
 728                         if (!name)
 729                                 return -ENOMEM;
 730                         if (!strcmp(name, "on")) {
 731                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 732                         } else if (!strcmp(name, "off")) {
 733                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 734                         } else if (!strcmp(name, "sync")) {
 735                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 736                         } else {
 737                                 kfree(name);
 738                                 return -EINVAL;
 739                         }
 740                         kfree(name);
 741                         break;
 742                 case Opt_disable_roll_forward:
 743                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 744                         break;
 745                 case Opt_norecovery:
 746                         /* this option mounts f2fs with ro */
 747                         set_opt(sbi, NORECOVERY);
 748                         if (!f2fs_readonly(sb))
 749                                 return -EINVAL;
 750                         break;
 751                 case Opt_discard:
 752                         if (!f2fs_hw_support_discard(sbi)) {
 753                                 f2fs_warn(sbi, "device does not support discard");
 754                                 break;
 755                         }
 756                         set_opt(sbi, DISCARD);
 757                         break;
 758                 case Opt_nodiscard:
 759                         if (f2fs_hw_should_discard(sbi)) {
 760                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 761                                 return -EINVAL;
 762                         }
 763                         clear_opt(sbi, DISCARD);
 764                         break;
 765                 case Opt_noheap:
 766                         set_opt(sbi, NOHEAP);
 767                         break;
 768                 case Opt_heap:
 769                         clear_opt(sbi, NOHEAP);
 770                         break;
 771 #ifdef CONFIG_F2FS_FS_XATTR
 772                 case Opt_user_xattr:
 773                         set_opt(sbi, XATTR_USER);
 774                         break;
 775                 case Opt_nouser_xattr:
 776                         clear_opt(sbi, XATTR_USER);
 777                         break;
 778                 case Opt_inline_xattr:
 779                         set_opt(sbi, INLINE_XATTR);
 780                         break;
 781                 case Opt_noinline_xattr:
 782                         clear_opt(sbi, INLINE_XATTR);
 783                         break;
 784                 case Opt_inline_xattr_size:
 785                         if (args->from && match_int(args, &arg))
 786                                 return -EINVAL;
 787                         set_opt(sbi, INLINE_XATTR_SIZE);
 788                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 789                         break;
 790 #else
 791                 case Opt_user_xattr:
 792                         f2fs_info(sbi, "user_xattr options not supported");
 793                         break;
 794                 case Opt_nouser_xattr:
 795                         f2fs_info(sbi, "nouser_xattr options not supported");
 796                         break;
 797                 case Opt_inline_xattr:
 798                         f2fs_info(sbi, "inline_xattr options not supported");
 799                         break;
 800                 case Opt_noinline_xattr:
 801                         f2fs_info(sbi, "noinline_xattr options not supported");
 802                         break;
 803 #endif
 804 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 805                 case Opt_acl:
 806                         set_opt(sbi, POSIX_ACL);
 807                         break;
 808                 case Opt_noacl:
 809                         clear_opt(sbi, POSIX_ACL);
 810                         break;
 811 #else
 812                 case Opt_acl:
 813                         f2fs_info(sbi, "acl options not supported");
 814                         break;
 815                 case Opt_noacl:
 816                         f2fs_info(sbi, "noacl options not supported");
 817                         break;
 818 #endif
 819                 case Opt_active_logs:
 820                         if (args->from && match_int(args, &arg))
 821                                 return -EINVAL;
 822                         if (arg != 2 && arg != 4 &&
 823                                 arg != NR_CURSEG_PERSIST_TYPE)
 824                                 return -EINVAL;
 825                         F2FS_OPTION(sbi).active_logs = arg;
 826                         break;
 827                 case Opt_disable_ext_identify:
 828                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 829                         break;
 830                 case Opt_inline_data:
 831                         set_opt(sbi, INLINE_DATA);
 832                         break;
 833                 case Opt_inline_dentry:
 834                         set_opt(sbi, INLINE_DENTRY);
 835                         break;
 836                 case Opt_noinline_dentry:
 837                         clear_opt(sbi, INLINE_DENTRY);
 838                         break;
 839                 case Opt_flush_merge:
 840                         set_opt(sbi, FLUSH_MERGE);
 841                         break;
 842                 case Opt_noflush_merge:
 843                         clear_opt(sbi, FLUSH_MERGE);
 844                         break;
 845                 case Opt_nobarrier:
 846                         set_opt(sbi, NOBARRIER);
 847                         break;
 848                 case Opt_barrier:
 849                         clear_opt(sbi, NOBARRIER);
 850                         break;
 851                 case Opt_fastboot:
 852                         set_opt(sbi, FASTBOOT);
 853                         break;
 854                 case Opt_extent_cache:
 855                         set_opt(sbi, READ_EXTENT_CACHE);
 856                         break;
 857                 case Opt_noextent_cache:
 858                         clear_opt(sbi, READ_EXTENT_CACHE);
 859                         break;
 860                 case Opt_noinline_data:
 861                         clear_opt(sbi, INLINE_DATA);
 862                         break;
 863                 case Opt_data_flush:
 864                         set_opt(sbi, DATA_FLUSH);
 865                         break;
 866                 case Opt_reserve_root:
 867                         if (args->from && match_int(args, &arg))
 868                                 return -EINVAL;
 869                         if (test_opt(sbi, RESERVE_ROOT)) {
 870                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 871                                           F2FS_OPTION(sbi).root_reserved_blocks);
 872                         } else {
 873                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 874                                 set_opt(sbi, RESERVE_ROOT);
 875                         }
 876                         break;
 877                 case Opt_resuid:
 878                         if (args->from && match_int(args, &arg))
 879                                 return -EINVAL;
 880                         uid = make_kuid(current_user_ns(), arg);
 881                         if (!uid_valid(uid)) {
 882                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 883                                 return -EINVAL;
 884                         }
 885                         F2FS_OPTION(sbi).s_resuid = uid;
 886                         break;
 887                 case Opt_resgid:
 888                         if (args->from && match_int(args, &arg))
 889                                 return -EINVAL;
 890                         gid = make_kgid(current_user_ns(), arg);
 891                         if (!gid_valid(gid)) {
 892                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 893                                 return -EINVAL;
 894                         }
 895                         F2FS_OPTION(sbi).s_resgid = gid;
 896                         break;
 897                 case Opt_mode:
 898                         name = match_strdup(&args[0]);
 899
 900                         if (!name)
 901                                 return -ENOMEM;
 902                         if (!strcmp(name, "adaptive")) {
 903                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 904                         } else if (!strcmp(name, "lfs")) {
 905                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 906                         } else if (!strcmp(name, "fragment:segment")) {
 907                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 908                         } else if (!strcmp(name, "fragment:block")) {
 909                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 910                         } else {
 911                                 kfree(name);
 912                                 return -EINVAL;
 913                         }
 914                         kfree(name);
 915                         break;
 916                 case Opt_io_size_bits:
 917                         if (args->from && match_int(args, &arg))
 918                                 return -EINVAL;
 919                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 920                                 f2fs_warn(sbi, "Not support %ld, larger than %d",
 921                                         BIT(arg), BIO_MAX_VECS);
 922                                 return -EINVAL;
 923                         }
 924                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 925                         break;
 926 #ifdef CONFIG_F2FS_FAULT_INJECTION
 927                 case Opt_fault_injection:
 928                         if (args->from && match_int(args, &arg))
 929                                 return -EINVAL;
 930                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 931                         set_opt(sbi, FAULT_INJECTION);
 932                         break;
 933
 934                 case Opt_fault_type:
 935                         if (args->from && match_int(args, &arg))
 936                                 return -EINVAL;
 937                         f2fs_build_fault_attr(sbi, 0, arg);
 938                         set_opt(sbi, FAULT_INJECTION);
 939                         break;
 940 #else
 941                 case Opt_fault_injection:
 942                         f2fs_info(sbi, "fault_injection options not supported");
 943                         break;
 944
 945                 case Opt_fault_type:
 946                         f2fs_info(sbi, "fault_type options not supported");
 947                         break;
 948 #endif
 949                 case Opt_lazytime:
 950                         sb->s_flags |= SB_LAZYTIME;
 951                         break;
 952                 case Opt_nolazytime:
 953                         sb->s_flags &= ~SB_LAZYTIME;
 954                         break;
 955 #ifdef CONFIG_QUOTA
 956                 case Opt_quota:
 957                 case Opt_usrquota:
 958                         set_opt(sbi, USRQUOTA);
 959                         break;
 960                 case Opt_grpquota:
 961                         set_opt(sbi, GRPQUOTA);
 962                         break;
 963                 case Opt_prjquota:
 964                         set_opt(sbi, PRJQUOTA);
 965                         break;
 966                 case Opt_usrjquota:
 967                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 968                         if (ret)
 969                                 return ret;
 970                         break;
 971                 case Opt_grpjquota:
 972                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 973                         if (ret)
 974                                 return ret;
 975                         break;
 976                 case Opt_prjjquota:
 977                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 978                         if (ret)
 979                                 return ret;
 980                         break;
 981                 case Opt_offusrjquota:
 982                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 983                         if (ret)
 984                                 return ret;
 985                         break;
 986                 case Opt_offgrpjquota:
 987                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 988                         if (ret)
 989                                 return ret;
 990                         break;
 991                 case Opt_offprjjquota:
 992                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 993                         if (ret)
 994                                 return ret;
 995                         break;
 996                 case Opt_jqfmt_vfsold:
 997                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 998                         break;
 999                 case Opt_jqfmt_vfsv0:
1000                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
1001                         break;
1002                 case Opt_jqfmt_vfsv1:
1003                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
1004                         break;
1005                 case Opt_noquota:
1006                         clear_opt(sbi, QUOTA);
1007                         clear_opt(sbi, USRQUOTA);
1008                         clear_opt(sbi, GRPQUOTA);
1009                         clear_opt(sbi, PRJQUOTA);
1010                         break;
1011 #else
1012                 case Opt_quota:
1013                 case Opt_usrquota:
1014                 case Opt_grpquota:
1015                 case Opt_prjquota:
1016                 case Opt_usrjquota:
1017                 case Opt_grpjquota:
1018                 case Opt_prjjquota:
1019                 case Opt_offusrjquota:
1020                 case Opt_offgrpjquota:
1021                 case Opt_offprjjquota:
1022                 case Opt_jqfmt_vfsold:
1023                 case Opt_jqfmt_vfsv0:
1024                 case Opt_jqfmt_vfsv1:
1025                 case Opt_noquota:
1026                         f2fs_info(sbi, "quota operations not supported");
1027                         break;
1028 #endif
1029                 case Opt_alloc:
1030                         name = match_strdup(&args[0]);
1031                         if (!name)
1032                                 return -ENOMEM;
1033
1034                         if (!strcmp(name, "default")) {
1035                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1036                         } else if (!strcmp(name, "reuse")) {
1037                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1038                         } else {
1039                                 kfree(name);
1040                                 return -EINVAL;
1041                         }
1042                         kfree(name);
1043                         break;
1044                 case Opt_fsync:
1045                         name = match_strdup(&args[0]);
1046                         if (!name)
1047                                 return -ENOMEM;
1048                         if (!strcmp(name, "posix")) {
1049                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1050                         } else if (!strcmp(name, "strict")) {
1051                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1052                         } else if (!strcmp(name, "nobarrier")) {
1053                                 F2FS_OPTION(sbi).fsync_mode =
1054                                                         FSYNC_MODE_NOBARRIER;
1055                         } else {
1056                                 kfree(name);
1057                                 return -EINVAL;
1058                         }
1059                         kfree(name);
1060                         break;
1061                 case Opt_test_dummy_encryption:
1062                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1063                                                              is_remount);
1064                         if (ret)
1065                                 return ret;
1066                         break;
1067                 case Opt_inlinecrypt:
1068 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1069                         sb->s_flags |= SB_INLINECRYPT;
1070 #else
1071                         f2fs_info(sbi, "inline encryption not supported");
1072 #endif
1073                         break;
1074                 case Opt_checkpoint_disable_cap_perc:
1075                         if (args->from && match_int(args, &arg))
1076                                 return -EINVAL;
1077                         if (arg < 0 || arg > 100)
1078                                 return -EINVAL;
1079                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1080                         set_opt(sbi, DISABLE_CHECKPOINT);
1081                         break;
1082                 case Opt_checkpoint_disable_cap:
1083                         if (args->from && match_int(args, &arg))
1084                                 return -EINVAL;
1085                         F2FS_OPTION(sbi).unusable_cap = arg;
1086                         set_opt(sbi, DISABLE_CHECKPOINT);
1087                         break;
1088                 case Opt_checkpoint_disable:
1089                         set_opt(sbi, DISABLE_CHECKPOINT);
1090                         break;
1091                 case Opt_checkpoint_enable:
1092                         clear_opt(sbi, DISABLE_CHECKPOINT);
1093                         break;
1094                 case Opt_checkpoint_merge:
1095                         set_opt(sbi, MERGE_CHECKPOINT);
1096                         break;
1097                 case Opt_nocheckpoint_merge:
1098                         clear_opt(sbi, MERGE_CHECKPOINT);
1099                         break;
1100 #ifdef CONFIG_F2FS_FS_COMPRESSION
1101                 case Opt_compress_algorithm:
1102                         if (!f2fs_sb_has_compression(sbi)) {
1103                                 f2fs_info(sbi, "Image doesn't support compression");
1104                                 break;
1105                         }
1106                         name = match_strdup(&args[0]);
1107                         if (!name)
1108                                 return -ENOMEM;
1109                         if (!strcmp(name, "lzo")) {
1110 #ifdef CONFIG_F2FS_FS_LZO
1111                                 F2FS_OPTION(sbi).compress_level = 0;
1112                                 F2FS_OPTION(sbi).compress_algorithm =
1113                                                                 COMPRESS_LZO;
1114 #else
1115                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1116 #endif
1117                         } else if (!strncmp(name, "lz4", 3)) {
1118 #ifdef CONFIG_F2FS_FS_LZ4
1119                                 ret = f2fs_set_lz4hc_level(sbi, name);
1120                                 if (ret) {
1121                                         kfree(name);
1122                                         return -EINVAL;
1123                                 }
1124                                 F2FS_OPTION(sbi).compress_algorithm =
1125                                                                 COMPRESS_LZ4;
1126 #else
1127                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1128 #endif
1129                         } else if (!strncmp(name, "zstd", 4)) {
1130 #ifdef CONFIG_F2FS_FS_ZSTD
1131                                 ret = f2fs_set_zstd_level(sbi, name);
1132                                 if (ret) {
1133                                         kfree(name);
1134                                         return -EINVAL;
1135                                 }
1136                                 F2FS_OPTION(sbi).compress_algorithm =
1137                                                                 COMPRESS_ZSTD;
1138 #else
1139                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1140 #endif
1141                         } else if (!strcmp(name, "lzo-rle")) {
1142 #ifdef CONFIG_F2FS_FS_LZORLE
1143                                 F2FS_OPTION(sbi).compress_level = 0;
1144                                 F2FS_OPTION(sbi).compress_algorithm =
1145                                                                 COMPRESS_LZORLE;
1146 #else
1147                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1148 #endif
1149                         } else {
1150                                 kfree(name);
1151                                 return -EINVAL;
1152                         }
1153                         kfree(name);
1154                         break;
1155                 case Opt_compress_log_size:
1156                         if (!f2fs_sb_has_compression(sbi)) {
1157                                 f2fs_info(sbi, "Image doesn't support compression");
1158                                 break;
1159                         }
1160                         if (args->from && match_int(args, &arg))
1161                                 return -EINVAL;
1162                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1163                                 arg > MAX_COMPRESS_LOG_SIZE) {
1164                                 f2fs_err(sbi,
1165                                         "Compress cluster log size is out of range");
1166                                 return -EINVAL;
1167                         }
1168                         F2FS_OPTION(sbi).compress_log_size = arg;
1169                         break;
1170                 case Opt_compress_extension:
1171                         if (!f2fs_sb_has_compression(sbi)) {
1172                                 f2fs_info(sbi, "Image doesn't support compression");
1173                                 break;
1174                         }
1175                         name = match_strdup(&args[0]);
1176                         if (!name)
1177                                 return -ENOMEM;
1178
1179                         ext = F2FS_OPTION(sbi).extensions;
1180                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1181
1182                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1183                                 ext_cnt >= COMPRESS_EXT_NUM) {
1184                                 f2fs_err(sbi,
1185                                         "invalid extension length/number");
1186                                 kfree(name);
1187                                 return -EINVAL;
1188                         }
1189
1190                         if (is_compress_extension_exist(sbi, name, true)) {
1191                                 kfree(name);
1192                                 break;
1193                         }
1194
1195                         strcpy(ext[ext_cnt], name);
1196                         F2FS_OPTION(sbi).compress_ext_cnt++;
1197                         kfree(name);
1198                         break;
1199                 case Opt_nocompress_extension:
1200                         if (!f2fs_sb_has_compression(sbi)) {
1201                                 f2fs_info(sbi, "Image doesn't support compression");
1202                                 break;
1203                         }
1204                         name = match_strdup(&args[0]);
1205                         if (!name)
1206                                 return -ENOMEM;
1207
1208                         noext = F2FS_OPTION(sbi).noextensions;
1209                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1210
1211                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1212                                 noext_cnt >= COMPRESS_EXT_NUM) {
1213                                 f2fs_err(sbi,
1214                                         "invalid extension length/number");
1215                                 kfree(name);
1216                                 return -EINVAL;
1217                         }
1218
1219                         if (is_compress_extension_exist(sbi, name, false)) {
1220                                 kfree(name);
1221                                 break;
1222                         }
1223
1224                         strcpy(noext[noext_cnt], name);
1225                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1226                         kfree(name);
1227                         break;
1228                 case Opt_compress_chksum:
1229                         if (!f2fs_sb_has_compression(sbi)) {
1230                                 f2fs_info(sbi, "Image doesn't support compression");
1231                                 break;
1232                         }
1233                         F2FS_OPTION(sbi).compress_chksum = true;
1234                         break;
1235                 case Opt_compress_mode:
1236                         if (!f2fs_sb_has_compression(sbi)) {
1237                                 f2fs_info(sbi, "Image doesn't support compression");
1238                                 break;
1239                         }
1240                         name = match_strdup(&args[0]);
1241                         if (!name)
1242                                 return -ENOMEM;
1243                         if (!strcmp(name, "fs")) {
1244                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1245                         } else if (!strcmp(name, "user")) {
1246                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1247                         } else {
1248                                 kfree(name);
1249                                 return -EINVAL;
1250                         }
1251                         kfree(name);
1252                         break;
1253                 case Opt_compress_cache:
1254                         if (!f2fs_sb_has_compression(sbi)) {
1255                                 f2fs_info(sbi, "Image doesn't support compression");
1256                                 break;
1257                         }
1258                         set_opt(sbi, COMPRESS_CACHE);
1259                         break;
1260 #else
1261                 case Opt_compress_algorithm:
1262                 case Opt_compress_log_size:
1263                 case Opt_compress_extension:
1264                 case Opt_nocompress_extension:
1265                 case Opt_compress_chksum:
1266                 case Opt_compress_mode:
1267                 case Opt_compress_cache:
1268                         f2fs_info(sbi, "compression options not supported");
1269                         break;
1270 #endif
1271                 case Opt_atgc:
1272                         set_opt(sbi, ATGC);
1273                         break;
1274                 case Opt_gc_merge:
1275                         set_opt(sbi, GC_MERGE);
1276                         break;
1277                 case Opt_nogc_merge:
1278                         clear_opt(sbi, GC_MERGE);
1279                         break;
1280                 case Opt_discard_unit:
1281                         name = match_strdup(&args[0]);
1282                         if (!name)
1283                                 return -ENOMEM;
1284                         if (!strcmp(name, "block")) {
1285                                 F2FS_OPTION(sbi).discard_unit =
1286                                                 DISCARD_UNIT_BLOCK;
1287                         } else if (!strcmp(name, "segment")) {
1288                                 F2FS_OPTION(sbi).discard_unit =
1289                                                 DISCARD_UNIT_SEGMENT;
1290                         } else if (!strcmp(name, "section")) {
1291                                 F2FS_OPTION(sbi).discard_unit =
1292                                                 DISCARD_UNIT_SECTION;
1293                         } else {
1294                                 kfree(name);
1295                                 return -EINVAL;
1296                         }
1297                         kfree(name);
1298                         break;
1299                 case Opt_memory_mode:
1300                         name = match_strdup(&args[0]);
1301                         if (!name)
1302                                 return -ENOMEM;
1303                         if (!strcmp(name, "normal")) {
1304                                 F2FS_OPTION(sbi).memory_mode =
1305                                                 MEMORY_MODE_NORMAL;
1306                         } else if (!strcmp(name, "low")) {
1307                                 F2FS_OPTION(sbi).memory_mode =
1308                                                 MEMORY_MODE_LOW;
1309                         } else {
1310                                 kfree(name);
1311                                 return -EINVAL;
1312                         }
1313                         kfree(name);
1314                         break;
1315                 case Opt_age_extent_cache:
1316                         set_opt(sbi, AGE_EXTENT_CACHE);
1317                         break;
1318                 case Opt_errors:
1319                         name = match_strdup(&args[0]);
1320                         if (!name)
1321                                 return -ENOMEM;
1322                         if (!strcmp(name, "remount-ro")) {
1323                                 F2FS_OPTION(sbi).errors =
1324                                                 MOUNT_ERRORS_READONLY;
1325                         } else if (!strcmp(name, "continue")) {
1326                                 F2FS_OPTION(sbi).errors =
1327                                                 MOUNT_ERRORS_CONTINUE;
1328                         } else if (!strcmp(name, "panic")) {
1329                                 F2FS_OPTION(sbi).errors =
1330                                                 MOUNT_ERRORS_PANIC;
1331                         } else {
1332                                 kfree(name);
1333                                 return -EINVAL;
1334                         }
1335                         kfree(name);
1336                         break;
1337                 default:
1338                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1339                                  p);
1340                         return -EINVAL;
1341                 }
1342         }
1343 default_check:
1344 #ifdef CONFIG_QUOTA
1345         if (f2fs_check_quota_options(sbi))
1346                 return -EINVAL;
1347 #else
1348         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1349                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1350                 return -EINVAL;
1351         }
1352         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1353                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1354                 return -EINVAL;
1355         }
1356 #endif
1357 #if !IS_ENABLED(CONFIG_UNICODE)
1358         if (f2fs_sb_has_casefold(sbi)) {
1359                 f2fs_err(sbi,
1360                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1361                 return -EINVAL;
1362         }
1363 #endif
1364         /*
1365          * The BLKZONED feature indicates that the drive was formatted with
1366          * zone alignment optimization. This is optional for host-aware
1367          * devices, but mandatory for host-managed zoned block devices.
1368          */
1369         if (f2fs_sb_has_blkzoned(sbi)) {
1370 #ifdef CONFIG_BLK_DEV_ZONED
1371                 if (F2FS_OPTION(sbi).discard_unit !=
1372                                                 DISCARD_UNIT_SECTION) {
1373                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1374                         F2FS_OPTION(sbi).discard_unit =
1375                                         DISCARD_UNIT_SECTION;
1376                 }
1377
1378                 if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) {
1379                         f2fs_info(sbi, "Only lfs mode is allowed with zoned block device feature");
1380                         return -EINVAL;
1381                 }
1382 #else
1383                 f2fs_err(sbi, "Zoned block device support is not enabled");
1384                 return -EINVAL;
1385 #endif
1386         }
1387
1388 #ifdef CONFIG_F2FS_FS_COMPRESSION
1389         if (f2fs_test_compress_extension(sbi)) {
1390                 f2fs_err(sbi, "invalid compress or nocompress extension");
1391                 return -EINVAL;
1392         }
1393 #endif
1394
1395         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1396                 f2fs_err(sbi, "Should set mode=lfs with %luKB-sized IO",
1397                          F2FS_IO_SIZE_KB(sbi));
1398                 return -EINVAL;
1399         }
1400
1401         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1402                 int min_size, max_size;
1403
1404                 if (!f2fs_sb_has_extra_attr(sbi) ||
1405                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1406                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1407                         return -EINVAL;
1408                 }
1409                 if (!test_opt(sbi, INLINE_XATTR)) {
1410                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1411                         return -EINVAL;
1412                 }
1413
1414                 min_size = MIN_INLINE_XATTR_SIZE;
1415                 max_size = MAX_INLINE_XATTR_SIZE;
1416
1417                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1418                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1419                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1420                                  min_size, max_size);
1421                         return -EINVAL;
1422                 }
1423         }
1424
1425         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1426                 f2fs_err(sbi, "LFS is not compatible with ATGC");
1427                 return -EINVAL;
1428         }
1429
1430         if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1431                 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1432                 return -EINVAL;
1433         }
1434
1435         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1436                 f2fs_err(sbi, "Allow to mount readonly mode only");
1437                 return -EROFS;
1438         }
1439         return 0;
1440 }
1441
1442 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1443 {
1444         struct f2fs_inode_info *fi;
1445
1446         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC))
1447                 return NULL;
1448
1449         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1450         if (!fi)
1451                 return NULL;
1452
1453         init_once((void *) fi);
1454
1455         /* Initialize f2fs-specific inode info */
1456         atomic_set(&fi->dirty_pages, 0);
1457         atomic_set(&fi->i_compr_blocks, 0);
1458         init_f2fs_rwsem(&fi->i_sem);
1459         spin_lock_init(&fi->i_size_lock);
1460         INIT_LIST_HEAD(&fi->dirty_list);
1461         INIT_LIST_HEAD(&fi->gdirty_list);
1462         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1463         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1464         init_f2fs_rwsem(&fi->i_xattr_sem);
1465
1466         /* Will be used by directory only */
1467         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1468
1469         return &fi->vfs_inode;
1470 }
1471
1472 static int f2fs_drop_inode(struct inode *inode)
1473 {
1474         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1475         int ret;
1476
1477         /*
1478          * during filesystem shutdown, if checkpoint is disabled,
1479          * drop useless meta/node dirty pages.
1480          */
1481         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1482                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1483                         inode->i_ino == F2FS_META_INO(sbi)) {
1484                         trace_f2fs_drop_inode(inode, 1);
1485                         return 1;
1486                 }
1487         }
1488
1489         /*
1490          * This is to avoid a deadlock condition like below.
1491          * writeback_single_inode(inode)
1492          *  - f2fs_write_data_page
1493          *    - f2fs_gc -> iput -> evict
1494          *       - inode_wait_for_writeback(inode)
1495          */
1496         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1497                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1498                         /* to avoid evict_inode call simultaneously */
1499                         atomic_inc(&inode->i_count);
1500                         spin_unlock(&inode->i_lock);
1501
1502                         /* should remain fi->extent_tree for writepage */
1503                         f2fs_destroy_extent_node(inode);
1504
1505                         sb_start_intwrite(inode->i_sb);
1506                         f2fs_i_size_write(inode, 0);
1507
1508                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1509                                         inode, NULL, 0, DATA);
1510                         truncate_inode_pages_final(inode->i_mapping);
1511
1512                         if (F2FS_HAS_BLOCKS(inode))
1513                                 f2fs_truncate(inode);
1514
1515                         sb_end_intwrite(inode->i_sb);
1516
1517                         spin_lock(&inode->i_lock);
1518                         atomic_dec(&inode->i_count);
1519                 }
1520                 trace_f2fs_drop_inode(inode, 0);
1521                 return 0;
1522         }
1523         ret = generic_drop_inode(inode);
1524         if (!ret)
1525                 ret = fscrypt_drop_inode(inode);
1526         trace_f2fs_drop_inode(inode, ret);
1527         return ret;
1528 }
1529
1530 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1531 {
1532         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1533         int ret = 0;
1534
1535         spin_lock(&sbi->inode_lock[DIRTY_META]);
1536         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1537                 ret = 1;
1538         } else {
1539                 set_inode_flag(inode, FI_DIRTY_INODE);
1540                 stat_inc_dirty_inode(sbi, DIRTY_META);
1541         }
1542         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1543                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1544                                 &sbi->inode_list[DIRTY_META]);
1545                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1546         }
1547         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1548         return ret;
1549 }
1550
1551 void f2fs_inode_synced(struct inode *inode)
1552 {
1553         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1554
1555         spin_lock(&sbi->inode_lock[DIRTY_META]);
1556         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1557                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1558                 return;
1559         }
1560         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1561                 list_del_init(&F2FS_I(inode)->gdirty_list);
1562                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1563         }
1564         clear_inode_flag(inode, FI_DIRTY_INODE);
1565         clear_inode_flag(inode, FI_AUTO_RECOVER);
1566         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1567         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1568 }
1569
1570 /*
1571  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1572  *
1573  * We should call set_dirty_inode to write the dirty inode through write_inode.
1574  */
1575 static void f2fs_dirty_inode(struct inode *inode, int flags)
1576 {
1577         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1578
1579         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1580                         inode->i_ino == F2FS_META_INO(sbi))
1581                 return;
1582
1583         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1584                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1585
1586         f2fs_inode_dirtied(inode, false);
1587 }
1588
1589 static void f2fs_free_inode(struct inode *inode)
1590 {
1591         fscrypt_free_inode(inode);
1592         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1593 }
1594
1595 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1596 {
1597         percpu_counter_destroy(&sbi->total_valid_inode_count);
1598         percpu_counter_destroy(&sbi->rf_node_block_count);
1599         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1600 }
1601
1602 static void destroy_device_list(struct f2fs_sb_info *sbi)
1603 {
1604         int i;
1605
1606         for (i = 0; i < sbi->s_ndevs; i++) {
1607                 if (i > 0)
1608                         bdev_release(FDEV(i).bdev_handle);
1609 #ifdef CONFIG_BLK_DEV_ZONED
1610                 kvfree(FDEV(i).blkz_seq);
1611 #endif
1612         }
1613         kvfree(sbi->devs);
1614 }
1615
1616 static void f2fs_put_super(struct super_block *sb)
1617 {
1618         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1619         int i;
1620         int err = 0;
1621         bool done;
1622
1623         /* unregister procfs/sysfs entries in advance to avoid race case */
1624         f2fs_unregister_sysfs(sbi);
1625
1626         f2fs_quota_off_umount(sb);
1627
1628         /* prevent remaining shrinker jobs */
1629         mutex_lock(&sbi->umount_mutex);
1630
1631         /*
1632          * flush all issued checkpoints and stop checkpoint issue thread.
1633          * after then, all checkpoints should be done by each process context.
1634          */
1635         f2fs_stop_ckpt_thread(sbi);
1636
1637         /*
1638          * We don't need to do checkpoint when superblock is clean.
1639          * But, the previous checkpoint was not done by umount, it needs to do
1640          * clean checkpoint again.
1641          */
1642         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1643                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1644                 struct cp_control cpc = {
1645                         .reason = CP_UMOUNT,
1646                 };
1647                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1648                 err = f2fs_write_checkpoint(sbi, &cpc);
1649         }
1650
1651         /* be sure to wait for any on-going discard commands */
1652         done = f2fs_issue_discard_timeout(sbi);
1653         if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && done) {
1654                 struct cp_control cpc = {
1655                         .reason = CP_UMOUNT | CP_TRIMMED,
1656                 };
1657                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1658                 err = f2fs_write_checkpoint(sbi, &cpc);
1659         }
1660
1661         /*
1662          * normally superblock is clean, so we need to release this.
1663          * In addition, EIO will skip do checkpoint, we need this as well.
1664          */
1665         f2fs_release_ino_entry(sbi, true);
1666
1667         f2fs_leave_shrinker(sbi);
1668         mutex_unlock(&sbi->umount_mutex);
1669
1670         /* our cp_error case, we can wait for any writeback page */
1671         f2fs_flush_merged_writes(sbi);
1672
1673         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1674
1675         if (err || f2fs_cp_error(sbi)) {
1676                 truncate_inode_pages_final(NODE_MAPPING(sbi));
1677                 truncate_inode_pages_final(META_MAPPING(sbi));
1678         }
1679
1680         for (i = 0; i < NR_COUNT_TYPE; i++) {
1681                 if (!get_pages(sbi, i))
1682                         continue;
1683                 f2fs_err(sbi, "detect filesystem reference count leak during "
1684                         "umount, type: %d, count: %lld", i, get_pages(sbi, i));
1685                 f2fs_bug_on(sbi, 1);
1686         }
1687
1688         f2fs_bug_on(sbi, sbi->fsync_node_num);
1689
1690         f2fs_destroy_compress_inode(sbi);
1691
1692         iput(sbi->node_inode);
1693         sbi->node_inode = NULL;
1694
1695         iput(sbi->meta_inode);
1696         sbi->meta_inode = NULL;
1697
1698         /*
1699          * iput() can update stat information, if f2fs_write_checkpoint()
1700          * above failed with error.
1701          */
1702         f2fs_destroy_stats(sbi);
1703
1704         /* destroy f2fs internal modules */
1705         f2fs_destroy_node_manager(sbi);
1706         f2fs_destroy_segment_manager(sbi);
1707
1708         /* flush s_error_work before sbi destroy */
1709         flush_work(&sbi->s_error_work);
1710
1711         f2fs_destroy_post_read_wq(sbi);
1712
1713         kvfree(sbi->ckpt);
1714
1715         sb->s_fs_info = NULL;
1716         if (sbi->s_chksum_driver)
1717                 crypto_free_shash(sbi->s_chksum_driver);
1718         kfree(sbi->raw_super);
1719
1720         destroy_device_list(sbi);
1721         f2fs_destroy_page_array_cache(sbi);
1722         f2fs_destroy_xattr_caches(sbi);
1723         mempool_destroy(sbi->write_io_dummy);
1724 #ifdef CONFIG_QUOTA
1725         for (i = 0; i < MAXQUOTAS; i++)
1726                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1727 #endif
1728         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1729         destroy_percpu_info(sbi);
1730         f2fs_destroy_iostat(sbi);
1731         for (i = 0; i < NR_PAGE_TYPE; i++)
1732                 kvfree(sbi->write_io[i]);
1733 #if IS_ENABLED(CONFIG_UNICODE)
1734         utf8_unload(sb->s_encoding);
1735 #endif
1736         kfree(sbi);
1737 }
1738
1739 int f2fs_sync_fs(struct super_block *sb, int sync)
1740 {
1741         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1742         int err = 0;
1743
1744         if (unlikely(f2fs_cp_error(sbi)))
1745                 return 0;
1746         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1747                 return 0;
1748
1749         trace_f2fs_sync_fs(sb, sync);
1750
1751         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1752                 return -EAGAIN;
1753
1754         if (sync) {
1755                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1756                 err = f2fs_issue_checkpoint(sbi);
1757         }
1758
1759         return err;
1760 }
1761
1762 static int f2fs_freeze(struct super_block *sb)
1763 {
1764         if (f2fs_readonly(sb))
1765                 return 0;
1766
1767         /* IO error happened before */
1768         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1769                 return -EIO;
1770
1771         /* must be clean, since sync_filesystem() was already called */
1772         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1773                 return -EINVAL;
1774
1775         /* Let's flush checkpoints and stop the thread. */
1776         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1777
1778         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1779         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1780         return 0;
1781 }
1782
1783 static int f2fs_unfreeze(struct super_block *sb)
1784 {
1785         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1786         return 0;
1787 }
1788
1789 #ifdef CONFIG_QUOTA
1790 static int f2fs_statfs_project(struct super_block *sb,
1791                                 kprojid_t projid, struct kstatfs *buf)
1792 {
1793         struct kqid qid;
1794         struct dquot *dquot;
1795         u64 limit;
1796         u64 curblock;
1797
1798         qid = make_kqid_projid(projid);
1799         dquot = dqget(sb, qid);
1800         if (IS_ERR(dquot))
1801                 return PTR_ERR(dquot);
1802         spin_lock(&dquot->dq_dqb_lock);
1803
1804         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1805                                         dquot->dq_dqb.dqb_bhardlimit);
1806         if (limit)
1807                 limit >>= sb->s_blocksize_bits;
1808
1809         if (limit && buf->f_blocks > limit) {
1810                 curblock = (dquot->dq_dqb.dqb_curspace +
1811                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1812                 buf->f_blocks = limit;
1813                 buf->f_bfree = buf->f_bavail =
1814                         (buf->f_blocks > curblock) ?
1815                          (buf->f_blocks - curblock) : 0;
1816         }
1817
1818         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1819                                         dquot->dq_dqb.dqb_ihardlimit);
1820
1821         if (limit && buf->f_files > limit) {
1822                 buf->f_files = limit;
1823                 buf->f_ffree =
1824                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1825                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1826         }
1827
1828         spin_unlock(&dquot->dq_dqb_lock);
1829         dqput(dquot);
1830         return 0;
1831 }
1832 #endif
1833
1834 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1835 {
1836         struct super_block *sb = dentry->d_sb;
1837         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1838         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1839         block_t total_count, user_block_count, start_count;
1840         u64 avail_node_count;
1841         unsigned int total_valid_node_count;
1842
1843         total_count = le64_to_cpu(sbi->raw_super->block_count);
1844         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1845         buf->f_type = F2FS_SUPER_MAGIC;
1846         buf->f_bsize = sbi->blocksize;
1847
1848         buf->f_blocks = total_count - start_count;
1849
1850         spin_lock(&sbi->stat_lock);
1851
1852         user_block_count = sbi->user_block_count;
1853         total_valid_node_count = valid_node_count(sbi);
1854         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1855         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1856                                                 sbi->current_reserved_blocks;
1857
1858         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1859                 buf->f_bfree = 0;
1860         else
1861                 buf->f_bfree -= sbi->unusable_block_count;
1862         spin_unlock(&sbi->stat_lock);
1863
1864         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1865                 buf->f_bavail = buf->f_bfree -
1866                                 F2FS_OPTION(sbi).root_reserved_blocks;
1867         else
1868                 buf->f_bavail = 0;
1869
1870         if (avail_node_count > user_block_count) {
1871                 buf->f_files = user_block_count;
1872                 buf->f_ffree = buf->f_bavail;
1873         } else {
1874                 buf->f_files = avail_node_count;
1875                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1876                                         buf->f_bavail);
1877         }
1878
1879         buf->f_namelen = F2FS_NAME_LEN;
1880         buf->f_fsid    = u64_to_fsid(id);
1881
1882 #ifdef CONFIG_QUOTA
1883         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1884                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1885                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1886         }
1887 #endif
1888         return 0;
1889 }
1890
1891 static inline void f2fs_show_quota_options(struct seq_file *seq,
1892                                            struct super_block *sb)
1893 {
1894 #ifdef CONFIG_QUOTA
1895         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1896
1897         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1898                 char *fmtname = "";
1899
1900                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1901                 case QFMT_VFS_OLD:
1902                         fmtname = "vfsold";
1903                         break;
1904                 case QFMT_VFS_V0:
1905                         fmtname = "vfsv0";
1906                         break;
1907                 case QFMT_VFS_V1:
1908                         fmtname = "vfsv1";
1909                         break;
1910                 }
1911                 seq_printf(seq, ",jqfmt=%s", fmtname);
1912         }
1913
1914         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1915                 seq_show_option(seq, "usrjquota",
1916                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1917
1918         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1919                 seq_show_option(seq, "grpjquota",
1920                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1921
1922         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1923                 seq_show_option(seq, "prjjquota",
1924                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1925 #endif
1926 }
1927
1928 #ifdef CONFIG_F2FS_FS_COMPRESSION
1929 static inline void f2fs_show_compress_options(struct seq_file *seq,
1930                                                         struct super_block *sb)
1931 {
1932         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1933         char *algtype = "";
1934         int i;
1935
1936         if (!f2fs_sb_has_compression(sbi))
1937                 return;
1938
1939         switch (F2FS_OPTION(sbi).compress_algorithm) {
1940         case COMPRESS_LZO:
1941                 algtype = "lzo";
1942                 break;
1943         case COMPRESS_LZ4:
1944                 algtype = "lz4";
1945                 break;
1946         case COMPRESS_ZSTD:
1947                 algtype = "zstd";
1948                 break;
1949         case COMPRESS_LZORLE:
1950                 algtype = "lzo-rle";
1951                 break;
1952         }
1953         seq_printf(seq, ",compress_algorithm=%s", algtype);
1954
1955         if (F2FS_OPTION(sbi).compress_level)
1956                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1957
1958         seq_printf(seq, ",compress_log_size=%u",
1959                         F2FS_OPTION(sbi).compress_log_size);
1960
1961         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1962                 seq_printf(seq, ",compress_extension=%s",
1963                         F2FS_OPTION(sbi).extensions[i]);
1964         }
1965
1966         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1967                 seq_printf(seq, ",nocompress_extension=%s",
1968                         F2FS_OPTION(sbi).noextensions[i]);
1969         }
1970
1971         if (F2FS_OPTION(sbi).compress_chksum)
1972                 seq_puts(seq, ",compress_chksum");
1973
1974         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1975                 seq_printf(seq, ",compress_mode=%s", "fs");
1976         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1977                 seq_printf(seq, ",compress_mode=%s", "user");
1978
1979         if (test_opt(sbi, COMPRESS_CACHE))
1980                 seq_puts(seq, ",compress_cache");
1981 }
1982 #endif
1983
1984 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1985 {
1986         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1987
1988         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1989                 seq_printf(seq, ",background_gc=%s", "sync");
1990         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1991                 seq_printf(seq, ",background_gc=%s", "on");
1992         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1993                 seq_printf(seq, ",background_gc=%s", "off");
1994
1995         if (test_opt(sbi, GC_MERGE))
1996                 seq_puts(seq, ",gc_merge");
1997         else
1998                 seq_puts(seq, ",nogc_merge");
1999
2000         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2001                 seq_puts(seq, ",disable_roll_forward");
2002         if (test_opt(sbi, NORECOVERY))
2003                 seq_puts(seq, ",norecovery");
2004         if (test_opt(sbi, DISCARD)) {
2005                 seq_puts(seq, ",discard");
2006                 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2007                         seq_printf(seq, ",discard_unit=%s", "block");
2008                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2009                         seq_printf(seq, ",discard_unit=%s", "segment");
2010                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2011                         seq_printf(seq, ",discard_unit=%s", "section");
2012         } else {
2013                 seq_puts(seq, ",nodiscard");
2014         }
2015         if (test_opt(sbi, NOHEAP))
2016                 seq_puts(seq, ",no_heap");
2017         else
2018                 seq_puts(seq, ",heap");
2019 #ifdef CONFIG_F2FS_FS_XATTR
2020         if (test_opt(sbi, XATTR_USER))
2021                 seq_puts(seq, ",user_xattr");
2022         else
2023                 seq_puts(seq, ",nouser_xattr");
2024         if (test_opt(sbi, INLINE_XATTR))
2025                 seq_puts(seq, ",inline_xattr");
2026         else
2027                 seq_puts(seq, ",noinline_xattr");
2028         if (test_opt(sbi, INLINE_XATTR_SIZE))
2029                 seq_printf(seq, ",inline_xattr_size=%u",
2030                                         F2FS_OPTION(sbi).inline_xattr_size);
2031 #endif
2032 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2033         if (test_opt(sbi, POSIX_ACL))
2034                 seq_puts(seq, ",acl");
2035         else
2036                 seq_puts(seq, ",noacl");
2037 #endif
2038         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
2039                 seq_puts(seq, ",disable_ext_identify");
2040         if (test_opt(sbi, INLINE_DATA))
2041                 seq_puts(seq, ",inline_data");
2042         else
2043                 seq_puts(seq, ",noinline_data");
2044         if (test_opt(sbi, INLINE_DENTRY))
2045                 seq_puts(seq, ",inline_dentry");
2046         else
2047                 seq_puts(seq, ",noinline_dentry");
2048         if (test_opt(sbi, FLUSH_MERGE))
2049                 seq_puts(seq, ",flush_merge");
2050         else
2051                 seq_puts(seq, ",noflush_merge");
2052         if (test_opt(sbi, NOBARRIER))
2053                 seq_puts(seq, ",nobarrier");
2054         else
2055                 seq_puts(seq, ",barrier");
2056         if (test_opt(sbi, FASTBOOT))
2057                 seq_puts(seq, ",fastboot");
2058         if (test_opt(sbi, READ_EXTENT_CACHE))
2059                 seq_puts(seq, ",extent_cache");
2060         else
2061                 seq_puts(seq, ",noextent_cache");
2062         if (test_opt(sbi, AGE_EXTENT_CACHE))
2063                 seq_puts(seq, ",age_extent_cache");
2064         if (test_opt(sbi, DATA_FLUSH))
2065                 seq_puts(seq, ",data_flush");
2066
2067         seq_puts(seq, ",mode=");
2068         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
2069                 seq_puts(seq, "adaptive");
2070         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
2071                 seq_puts(seq, "lfs");
2072         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
2073                 seq_puts(seq, "fragment:segment");
2074         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2075                 seq_puts(seq, "fragment:block");
2076         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
2077         if (test_opt(sbi, RESERVE_ROOT))
2078                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
2079                                 F2FS_OPTION(sbi).root_reserved_blocks,
2080                                 from_kuid_munged(&init_user_ns,
2081                                         F2FS_OPTION(sbi).s_resuid),
2082                                 from_kgid_munged(&init_user_ns,
2083                                         F2FS_OPTION(sbi).s_resgid));
2084         if (F2FS_IO_SIZE_BITS(sbi))
2085                 seq_printf(seq, ",io_bits=%u",
2086                                 F2FS_OPTION(sbi).write_io_size_bits);
2087 #ifdef CONFIG_F2FS_FAULT_INJECTION
2088         if (test_opt(sbi, FAULT_INJECTION)) {
2089                 seq_printf(seq, ",fault_injection=%u",
2090                                 F2FS_OPTION(sbi).fault_info.inject_rate);
2091                 seq_printf(seq, ",fault_type=%u",
2092                                 F2FS_OPTION(sbi).fault_info.inject_type);
2093         }
2094 #endif
2095 #ifdef CONFIG_QUOTA
2096         if (test_opt(sbi, QUOTA))
2097                 seq_puts(seq, ",quota");
2098         if (test_opt(sbi, USRQUOTA))
2099                 seq_puts(seq, ",usrquota");
2100         if (test_opt(sbi, GRPQUOTA))
2101                 seq_puts(seq, ",grpquota");
2102         if (test_opt(sbi, PRJQUOTA))
2103                 seq_puts(seq, ",prjquota");
2104 #endif
2105         f2fs_show_quota_options(seq, sbi->sb);
2106
2107         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2108
2109         if (sbi->sb->s_flags & SB_INLINECRYPT)
2110                 seq_puts(seq, ",inlinecrypt");
2111
2112         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2113                 seq_printf(seq, ",alloc_mode=%s", "default");
2114         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2115                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2116
2117         if (test_opt(sbi, DISABLE_CHECKPOINT))
2118                 seq_printf(seq, ",checkpoint=disable:%u",
2119                                 F2FS_OPTION(sbi).unusable_cap);
2120         if (test_opt(sbi, MERGE_CHECKPOINT))
2121                 seq_puts(seq, ",checkpoint_merge");
2122         else
2123                 seq_puts(seq, ",nocheckpoint_merge");
2124         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2125                 seq_printf(seq, ",fsync_mode=%s", "posix");
2126         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2127                 seq_printf(seq, ",fsync_mode=%s", "strict");
2128         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2129                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2130
2131 #ifdef CONFIG_F2FS_FS_COMPRESSION
2132         f2fs_show_compress_options(seq, sbi->sb);
2133 #endif
2134
2135         if (test_opt(sbi, ATGC))
2136                 seq_puts(seq, ",atgc");
2137
2138         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2139                 seq_printf(seq, ",memory=%s", "normal");
2140         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2141                 seq_printf(seq, ",memory=%s", "low");
2142
2143         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
2144                 seq_printf(seq, ",errors=%s", "remount-ro");
2145         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
2146                 seq_printf(seq, ",errors=%s", "continue");
2147         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
2148                 seq_printf(seq, ",errors=%s", "panic");
2149
2150         return 0;
2151 }
2152
2153 static void default_options(struct f2fs_sb_info *sbi, bool remount)
2154 {
2155         /* init some FS parameters */
2156         if (!remount) {
2157                 set_opt(sbi, READ_EXTENT_CACHE);
2158                 clear_opt(sbi, DISABLE_CHECKPOINT);
2159
2160                 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2161                         set_opt(sbi, DISCARD);
2162
2163                 if (f2fs_sb_has_blkzoned(sbi))
2164                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2165                 else
2166                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2167         }
2168
2169         if (f2fs_sb_has_readonly(sbi))
2170                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2171         else
2172                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2173
2174         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2175         if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2176                                                         SMALL_VOLUME_SEGMENTS)
2177                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2178         else
2179                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2180         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2181         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2182         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2183         if (f2fs_sb_has_compression(sbi)) {
2184                 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2185                 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2186                 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2187                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2188         }
2189         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2190         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2191         F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
2192
2193         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2194
2195         set_opt(sbi, INLINE_XATTR);
2196         set_opt(sbi, INLINE_DATA);
2197         set_opt(sbi, INLINE_DENTRY);
2198         set_opt(sbi, NOHEAP);
2199         set_opt(sbi, MERGE_CHECKPOINT);
2200         F2FS_OPTION(sbi).unusable_cap = 0;
2201         sbi->sb->s_flags |= SB_LAZYTIME;
2202         if (!f2fs_is_readonly(sbi))
2203                 set_opt(sbi, FLUSH_MERGE);
2204         if (f2fs_sb_has_blkzoned(sbi))
2205                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2206         else
2207                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2208
2209 #ifdef CONFIG_F2FS_FS_XATTR
2210         set_opt(sbi, XATTR_USER);
2211 #endif
2212 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2213         set_opt(sbi, POSIX_ACL);
2214 #endif
2215
2216         f2fs_build_fault_attr(sbi, 0, 0);
2217 }
2218
2219 #ifdef CONFIG_QUOTA
2220 static int f2fs_enable_quotas(struct super_block *sb);
2221 #endif
2222
2223 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2224 {
2225         unsigned int s_flags = sbi->sb->s_flags;
2226         struct cp_control cpc;
2227         unsigned int gc_mode = sbi->gc_mode;
2228         int err = 0;
2229         int ret;
2230         block_t unusable;
2231
2232         if (s_flags & SB_RDONLY) {
2233                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2234                 return -EINVAL;
2235         }
2236         sbi->sb->s_flags |= SB_ACTIVE;
2237
2238         /* check if we need more GC first */
2239         unusable = f2fs_get_unusable_blocks(sbi);
2240         if (!f2fs_disable_cp_again(sbi, unusable))
2241                 goto skip_gc;
2242
2243         f2fs_update_time(sbi, DISABLE_TIME);
2244
2245         sbi->gc_mode = GC_URGENT_HIGH;
2246
2247         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2248                 struct f2fs_gc_control gc_control = {
2249                         .victim_segno = NULL_SEGNO,
2250                         .init_gc_type = FG_GC,
2251                         .should_migrate_blocks = false,
2252                         .err_gc_skipped = true,
2253                         .nr_free_secs = 1 };
2254
2255                 f2fs_down_write(&sbi->gc_lock);
2256                 stat_inc_gc_call_count(sbi, FOREGROUND);
2257                 err = f2fs_gc(sbi, &gc_control);
2258                 if (err == -ENODATA) {
2259                         err = 0;
2260                         break;
2261                 }
2262                 if (err && err != -EAGAIN)
2263                         break;
2264         }
2265
2266         ret = sync_filesystem(sbi->sb);
2267         if (ret || err) {
2268                 err = ret ? ret : err;
2269                 goto restore_flag;
2270         }
2271
2272         unusable = f2fs_get_unusable_blocks(sbi);
2273         if (f2fs_disable_cp_again(sbi, unusable)) {
2274                 err = -EAGAIN;
2275                 goto restore_flag;
2276         }
2277
2278 skip_gc:
2279         f2fs_down_write(&sbi->gc_lock);
2280         cpc.reason = CP_PAUSE;
2281         set_sbi_flag(sbi, SBI_CP_DISABLED);
2282         stat_inc_cp_call_count(sbi, TOTAL_CALL);
2283         err = f2fs_write_checkpoint(sbi, &cpc);
2284         if (err)
2285                 goto out_unlock;
2286
2287         spin_lock(&sbi->stat_lock);
2288         sbi->unusable_block_count = unusable;
2289         spin_unlock(&sbi->stat_lock);
2290
2291 out_unlock:
2292         f2fs_up_write(&sbi->gc_lock);
2293 restore_flag:
2294         sbi->gc_mode = gc_mode;
2295         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2296         return err;
2297 }
2298
2299 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2300 {
2301         int retry = DEFAULT_RETRY_IO_COUNT;
2302
2303         /* we should flush all the data to keep data consistency */
2304         do {
2305                 sync_inodes_sb(sbi->sb);
2306                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2307         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2308
2309         if (unlikely(retry < 0))
2310                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2311
2312         f2fs_down_write(&sbi->gc_lock);
2313         f2fs_dirty_to_prefree(sbi);
2314
2315         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2316         set_sbi_flag(sbi, SBI_IS_DIRTY);
2317         f2fs_up_write(&sbi->gc_lock);
2318
2319         f2fs_sync_fs(sbi->sb, 1);
2320
2321         /* Let's ensure there's no pending checkpoint anymore */
2322         f2fs_flush_ckpt_thread(sbi);
2323 }
2324
2325 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2326 {
2327         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2328         struct f2fs_mount_info org_mount_opt;
2329         unsigned long old_sb_flags;
2330         int err;
2331         bool need_restart_gc = false, need_stop_gc = false;
2332         bool need_restart_flush = false, need_stop_flush = false;
2333         bool need_restart_discard = false, need_stop_discard = false;
2334         bool need_enable_checkpoint = false, need_disable_checkpoint = false;
2335         bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2336         bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2337         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2338         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2339         bool no_atgc = !test_opt(sbi, ATGC);
2340         bool no_discard = !test_opt(sbi, DISCARD);
2341         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2342         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2343 #ifdef CONFIG_QUOTA
2344         int i, j;
2345 #endif
2346
2347         /*
2348          * Save the old mount options in case we
2349          * need to restore them.
2350          */
2351         org_mount_opt = sbi->mount_opt;
2352         old_sb_flags = sb->s_flags;
2353
2354 #ifdef CONFIG_QUOTA
2355         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2356         for (i = 0; i < MAXQUOTAS; i++) {
2357                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2358                         org_mount_opt.s_qf_names[i] =
2359                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2360                                 GFP_KERNEL);
2361                         if (!org_mount_opt.s_qf_names[i]) {
2362                                 for (j = 0; j < i; j++)
2363                                         kfree(org_mount_opt.s_qf_names[j]);
2364                                 return -ENOMEM;
2365                         }
2366                 } else {
2367                         org_mount_opt.s_qf_names[i] = NULL;
2368                 }
2369         }
2370 #endif
2371
2372         /* recover superblocks we couldn't write due to previous RO mount */
2373         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2374                 err = f2fs_commit_super(sbi, false);
2375                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2376                           err);
2377                 if (!err)
2378                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2379         }
2380
2381         default_options(sbi, true);
2382
2383         /* parse mount options */
2384         err = parse_options(sb, data, true);
2385         if (err)
2386                 goto restore_opts;
2387
2388         /* flush outstanding errors before changing fs state */
2389         flush_work(&sbi->s_error_work);
2390
2391         /*
2392          * Previous and new state of filesystem is RO,
2393          * so skip checking GC and FLUSH_MERGE conditions.
2394          */
2395         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2396                 goto skip;
2397
2398         if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
2399                 err = -EROFS;
2400                 goto restore_opts;
2401         }
2402
2403 #ifdef CONFIG_QUOTA
2404         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2405                 err = dquot_suspend(sb, -1);
2406                 if (err < 0)
2407                         goto restore_opts;
2408         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2409                 /* dquot_resume needs RW */
2410                 sb->s_flags &= ~SB_RDONLY;
2411                 if (sb_any_quota_suspended(sb)) {
2412                         dquot_resume(sb, -1);
2413                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2414                         err = f2fs_enable_quotas(sb);
2415                         if (err)
2416                                 goto restore_opts;
2417                 }
2418         }
2419 #endif
2420         if (f2fs_lfs_mode(sbi) && !IS_F2FS_IPU_DISABLE(sbi)) {
2421                 err = -EINVAL;
2422                 f2fs_warn(sbi, "LFS is not compatible with IPU");
2423                 goto restore_opts;
2424         }
2425
2426         /* disallow enable atgc dynamically */
2427         if (no_atgc == !!test_opt(sbi, ATGC)) {
2428                 err = -EINVAL;
2429                 f2fs_warn(sbi, "switch atgc option is not allowed");
2430                 goto restore_opts;
2431         }
2432
2433         /* disallow enable/disable extent_cache dynamically */
2434         if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2435                 err = -EINVAL;
2436                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2437                 goto restore_opts;
2438         }
2439         /* disallow enable/disable age extent_cache dynamically */
2440         if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2441                 err = -EINVAL;
2442                 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2443                 goto restore_opts;
2444         }
2445
2446         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2447                 err = -EINVAL;
2448                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2449                 goto restore_opts;
2450         }
2451
2452         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2453                 err = -EINVAL;
2454                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2455                 goto restore_opts;
2456         }
2457
2458         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2459                 err = -EINVAL;
2460                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2461                 goto restore_opts;
2462         }
2463
2464         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2465                 err = -EINVAL;
2466                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2467                 goto restore_opts;
2468         }
2469
2470         /*
2471          * We stop the GC thread if FS is mounted as RO
2472          * or if background_gc = off is passed in mount
2473          * option. Also sync the filesystem.
2474          */
2475         if ((*flags & SB_RDONLY) ||
2476                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2477                         !test_opt(sbi, GC_MERGE))) {
2478                 if (sbi->gc_thread) {
2479                         f2fs_stop_gc_thread(sbi);
2480                         need_restart_gc = true;
2481                 }
2482         } else if (!sbi->gc_thread) {
2483                 err = f2fs_start_gc_thread(sbi);
2484                 if (err)
2485                         goto restore_opts;
2486                 need_stop_gc = true;
2487         }
2488
2489         if (*flags & SB_RDONLY) {
2490                 sync_inodes_sb(sb);
2491
2492                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2493                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2494                 f2fs_sync_fs(sb, 1);
2495                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2496         }
2497
2498         /*
2499          * We stop issue flush thread if FS is mounted as RO
2500          * or if flush_merge is not passed in mount option.
2501          */
2502         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2503                 clear_opt(sbi, FLUSH_MERGE);
2504                 f2fs_destroy_flush_cmd_control(sbi, false);
2505                 need_restart_flush = true;
2506         } else {
2507                 err = f2fs_create_flush_cmd_control(sbi);
2508                 if (err)
2509                         goto restore_gc;
2510                 need_stop_flush = true;
2511         }
2512
2513         if (no_discard == !!test_opt(sbi, DISCARD)) {
2514                 if (test_opt(sbi, DISCARD)) {
2515                         err = f2fs_start_discard_thread(sbi);
2516                         if (err)
2517                                 goto restore_flush;
2518                         need_stop_discard = true;
2519                 } else {
2520                         f2fs_stop_discard_thread(sbi);
2521                         f2fs_issue_discard_timeout(sbi);
2522                         need_restart_discard = true;
2523                 }
2524         }
2525
2526         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2527                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2528                         err = f2fs_disable_checkpoint(sbi);
2529                         if (err)
2530                                 goto restore_discard;
2531                         need_enable_checkpoint = true;
2532                 } else {
2533                         f2fs_enable_checkpoint(sbi);
2534                         need_disable_checkpoint = true;
2535                 }
2536         }
2537
2538         /*
2539          * Place this routine at the end, since a new checkpoint would be
2540          * triggered while remount and we need to take care of it before
2541          * returning from remount.
2542          */
2543         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2544                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2545                 f2fs_stop_ckpt_thread(sbi);
2546         } else {
2547                 /* Flush if the prevous checkpoint, if exists. */
2548                 f2fs_flush_ckpt_thread(sbi);
2549
2550                 err = f2fs_start_ckpt_thread(sbi);
2551                 if (err) {
2552                         f2fs_err(sbi,
2553                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2554                             err);
2555                         goto restore_checkpoint;
2556                 }
2557         }
2558
2559 skip:
2560 #ifdef CONFIG_QUOTA
2561         /* Release old quota file names */
2562         for (i = 0; i < MAXQUOTAS; i++)
2563                 kfree(org_mount_opt.s_qf_names[i]);
2564 #endif
2565         /* Update the POSIXACL Flag */
2566         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2567                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2568
2569         limit_reserve_root(sbi);
2570         adjust_unusable_cap_perc(sbi);
2571         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2572         return 0;
2573 restore_checkpoint:
2574         if (need_enable_checkpoint) {
2575                 f2fs_enable_checkpoint(sbi);
2576         } else if (need_disable_checkpoint) {
2577                 if (f2fs_disable_checkpoint(sbi))
2578                         f2fs_warn(sbi, "checkpoint has not been disabled");
2579         }
2580 restore_discard:
2581         if (need_restart_discard) {
2582                 if (f2fs_start_discard_thread(sbi))
2583                         f2fs_warn(sbi, "discard has been stopped");
2584         } else if (need_stop_discard) {
2585                 f2fs_stop_discard_thread(sbi);
2586         }
2587 restore_flush:
2588         if (need_restart_flush) {
2589                 if (f2fs_create_flush_cmd_control(sbi))
2590                         f2fs_warn(sbi, "background flush thread has stopped");
2591         } else if (need_stop_flush) {
2592                 clear_opt(sbi, FLUSH_MERGE);
2593                 f2fs_destroy_flush_cmd_control(sbi, false);
2594         }
2595 restore_gc:
2596         if (need_restart_gc) {
2597                 if (f2fs_start_gc_thread(sbi))
2598                         f2fs_warn(sbi, "background gc thread has stopped");
2599         } else if (need_stop_gc) {
2600                 f2fs_stop_gc_thread(sbi);
2601         }
2602 restore_opts:
2603 #ifdef CONFIG_QUOTA
2604         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2605         for (i = 0; i < MAXQUOTAS; i++) {
2606                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2607                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2608         }
2609 #endif
2610         sbi->mount_opt = org_mount_opt;
2611         sb->s_flags = old_sb_flags;
2612         return err;
2613 }
2614
2615 #ifdef CONFIG_QUOTA
2616 static bool f2fs_need_recovery(struct f2fs_sb_info *sbi)
2617 {
2618         /* need to recovery orphan */
2619         if (is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
2620                 return true;
2621         /* need to recovery data */
2622         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2623                 return false;
2624         if (test_opt(sbi, NORECOVERY))
2625                 return false;
2626         return !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG);
2627 }
2628
2629 static bool f2fs_recover_quota_begin(struct f2fs_sb_info *sbi)
2630 {
2631         bool readonly = f2fs_readonly(sbi->sb);
2632
2633         if (!f2fs_need_recovery(sbi))
2634                 return false;
2635
2636         /* it doesn't need to check f2fs_sb_has_readonly() */
2637         if (f2fs_hw_is_readonly(sbi))
2638                 return false;
2639
2640         if (readonly) {
2641                 sbi->sb->s_flags &= ~SB_RDONLY;
2642                 set_sbi_flag(sbi, SBI_IS_WRITABLE);
2643         }
2644
2645         /*
2646          * Turn on quotas which were not enabled for read-only mounts if
2647          * filesystem has quota feature, so that they are updated correctly.
2648          */
2649         return f2fs_enable_quota_files(sbi, readonly);
2650 }
2651
2652 static void f2fs_recover_quota_end(struct f2fs_sb_info *sbi,
2653                                                 bool quota_enabled)
2654 {
2655         if (quota_enabled)
2656                 f2fs_quota_off_umount(sbi->sb);
2657
2658         if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE)) {
2659                 clear_sbi_flag(sbi, SBI_IS_WRITABLE);
2660                 sbi->sb->s_flags |= SB_RDONLY;
2661         }
2662 }
2663
2664 /* Read data from quotafile */
2665 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2666                                size_t len, loff_t off)
2667 {
2668         struct inode *inode = sb_dqopt(sb)->files[type];
2669         struct address_space *mapping = inode->i_mapping;
2670         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2671         int offset = off & (sb->s_blocksize - 1);
2672         int tocopy;
2673         size_t toread;
2674         loff_t i_size = i_size_read(inode);
2675         struct page *page;
2676
2677         if (off > i_size)
2678                 return 0;
2679
2680         if (off + len > i_size)
2681                 len = i_size - off;
2682         toread = len;
2683         while (toread > 0) {
2684                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2685 repeat:
2686                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2687                 if (IS_ERR(page)) {
2688                         if (PTR_ERR(page) == -ENOMEM) {
2689                                 memalloc_retry_wait(GFP_NOFS);
2690                                 goto repeat;
2691                         }
2692                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2693                         return PTR_ERR(page);
2694                 }
2695
2696                 lock_page(page);
2697
2698                 if (unlikely(page->mapping != mapping)) {
2699                         f2fs_put_page(page, 1);
2700                         goto repeat;
2701                 }
2702                 if (unlikely(!PageUptodate(page))) {
2703                         f2fs_put_page(page, 1);
2704                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2705                         return -EIO;
2706                 }
2707
2708                 memcpy_from_page(data, page, offset, tocopy);
2709                 f2fs_put_page(page, 1);
2710
2711                 offset = 0;
2712                 toread -= tocopy;
2713                 data += tocopy;
2714                 blkidx++;
2715         }
2716         return len;
2717 }
2718
2719 /* Write to quotafile */
2720 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2721                                 const char *data, size_t len, loff_t off)
2722 {
2723         struct inode *inode = sb_dqopt(sb)->files[type];
2724         struct address_space *mapping = inode->i_mapping;
2725         const struct address_space_operations *a_ops = mapping->a_ops;
2726         int offset = off & (sb->s_blocksize - 1);
2727         size_t towrite = len;
2728         struct page *page;
2729         void *fsdata = NULL;
2730         int err = 0;
2731         int tocopy;
2732
2733         while (towrite > 0) {
2734                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2735                                                                 towrite);
2736 retry:
2737                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2738                                                         &page, &fsdata);
2739                 if (unlikely(err)) {
2740                         if (err == -ENOMEM) {
2741                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2742                                 goto retry;
2743                         }
2744                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2745                         break;
2746                 }
2747
2748                 memcpy_to_page(page, offset, data, tocopy);
2749
2750                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2751                                                 page, fsdata);
2752                 offset = 0;
2753                 towrite -= tocopy;
2754                 off += tocopy;
2755                 data += tocopy;
2756                 cond_resched();
2757         }
2758
2759         if (len == towrite)
2760                 return err;
2761         inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
2762         f2fs_mark_inode_dirty_sync(inode, false);
2763         return len - towrite;
2764 }
2765
2766 int f2fs_dquot_initialize(struct inode *inode)
2767 {
2768         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT))
2769                 return -ESRCH;
2770
2771         return dquot_initialize(inode);
2772 }
2773
2774 static struct dquot **f2fs_get_dquots(struct inode *inode)
2775 {
2776         return F2FS_I(inode)->i_dquot;
2777 }
2778
2779 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2780 {
2781         return &F2FS_I(inode)->i_reserved_quota;
2782 }
2783
2784 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2785 {
2786         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2787                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2788                 return 0;
2789         }
2790
2791         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2792                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2793 }
2794
2795 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2796 {
2797         int enabled = 0;
2798         int i, err;
2799
2800         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2801                 err = f2fs_enable_quotas(sbi->sb);
2802                 if (err) {
2803                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2804                         return 0;
2805                 }
2806                 return 1;
2807         }
2808
2809         for (i = 0; i < MAXQUOTAS; i++) {
2810                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2811                         err = f2fs_quota_on_mount(sbi, i);
2812                         if (!err) {
2813                                 enabled = 1;
2814                                 continue;
2815                         }
2816                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2817                                  err, i);
2818                 }
2819         }
2820         return enabled;
2821 }
2822
2823 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2824                              unsigned int flags)
2825 {
2826         struct inode *qf_inode;
2827         unsigned long qf_inum;
2828         unsigned long qf_flag = F2FS_QUOTA_DEFAULT_FL;
2829         int err;
2830
2831         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2832
2833         qf_inum = f2fs_qf_ino(sb, type);
2834         if (!qf_inum)
2835                 return -EPERM;
2836
2837         qf_inode = f2fs_iget(sb, qf_inum);
2838         if (IS_ERR(qf_inode)) {
2839                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2840                 return PTR_ERR(qf_inode);
2841         }
2842
2843         /* Don't account quota for quota files to avoid recursion */
2844         inode_lock(qf_inode);
2845         qf_inode->i_flags |= S_NOQUOTA;
2846
2847         if ((F2FS_I(qf_inode)->i_flags & qf_flag) != qf_flag) {
2848                 F2FS_I(qf_inode)->i_flags |= qf_flag;
2849                 f2fs_set_inode_flags(qf_inode);
2850         }
2851         inode_unlock(qf_inode);
2852
2853         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2854         iput(qf_inode);
2855         return err;
2856 }
2857
2858 static int f2fs_enable_quotas(struct super_block *sb)
2859 {
2860         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2861         int type, err = 0;
2862         unsigned long qf_inum;
2863         bool quota_mopt[MAXQUOTAS] = {
2864                 test_opt(sbi, USRQUOTA),
2865                 test_opt(sbi, GRPQUOTA),
2866                 test_opt(sbi, PRJQUOTA),
2867         };
2868
2869         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2870                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2871                 return 0;
2872         }
2873
2874         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2875
2876         for (type = 0; type < MAXQUOTAS; type++) {
2877                 qf_inum = f2fs_qf_ino(sb, type);
2878                 if (qf_inum) {
2879                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2880                                 DQUOT_USAGE_ENABLED |
2881                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2882                         if (err) {
2883                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2884                                          type, err);
2885                                 for (type--; type >= 0; type--)
2886                                         dquot_quota_off(sb, type);
2887                                 set_sbi_flag(F2FS_SB(sb),
2888                                                 SBI_QUOTA_NEED_REPAIR);
2889                                 return err;
2890                         }
2891                 }
2892         }
2893         return 0;
2894 }
2895
2896 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2897 {
2898         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2899         struct address_space *mapping = dqopt->files[type]->i_mapping;
2900         int ret = 0;
2901
2902         ret = dquot_writeback_dquots(sbi->sb, type);
2903         if (ret)
2904                 goto out;
2905
2906         ret = filemap_fdatawrite(mapping);
2907         if (ret)
2908                 goto out;
2909
2910         /* if we are using journalled quota */
2911         if (is_journalled_quota(sbi))
2912                 goto out;
2913
2914         ret = filemap_fdatawait(mapping);
2915
2916         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2917 out:
2918         if (ret)
2919                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2920         return ret;
2921 }
2922
2923 int f2fs_quota_sync(struct super_block *sb, int type)
2924 {
2925         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2926         struct quota_info *dqopt = sb_dqopt(sb);
2927         int cnt;
2928         int ret = 0;
2929
2930         /*
2931          * Now when everything is written we can discard the pagecache so
2932          * that userspace sees the changes.
2933          */
2934         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2935
2936                 if (type != -1 && cnt != type)
2937                         continue;
2938
2939                 if (!sb_has_quota_active(sb, cnt))
2940                         continue;
2941
2942                 if (!f2fs_sb_has_quota_ino(sbi))
2943                         inode_lock(dqopt->files[cnt]);
2944
2945                 /*
2946                  * do_quotactl
2947                  *  f2fs_quota_sync
2948                  *  f2fs_down_read(quota_sem)
2949                  *  dquot_writeback_dquots()
2950                  *  f2fs_dquot_commit
2951                  *                            block_operation
2952                  *                            f2fs_down_read(quota_sem)
2953                  */
2954                 f2fs_lock_op(sbi);
2955                 f2fs_down_read(&sbi->quota_sem);
2956
2957                 ret = f2fs_quota_sync_file(sbi, cnt);
2958
2959                 f2fs_up_read(&sbi->quota_sem);
2960                 f2fs_unlock_op(sbi);
2961
2962                 if (!f2fs_sb_has_quota_ino(sbi))
2963                         inode_unlock(dqopt->files[cnt]);
2964
2965                 if (ret)
2966                         break;
2967         }
2968         return ret;
2969 }
2970
2971 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2972                                                         const struct path *path)
2973 {
2974         struct inode *inode;
2975         int err;
2976
2977         /* if quota sysfile exists, deny enabling quota with specific file */
2978         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2979                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2980                 return -EBUSY;
2981         }
2982
2983         if (path->dentry->d_sb != sb)
2984                 return -EXDEV;
2985
2986         err = f2fs_quota_sync(sb, type);
2987         if (err)
2988                 return err;
2989
2990         inode = d_inode(path->dentry);
2991
2992         err = filemap_fdatawrite(inode->i_mapping);
2993         if (err)
2994                 return err;
2995
2996         err = filemap_fdatawait(inode->i_mapping);
2997         if (err)
2998                 return err;
2999
3000         err = dquot_quota_on(sb, type, format_id, path);
3001         if (err)
3002                 return err;
3003
3004         inode_lock(inode);
3005         F2FS_I(inode)->i_flags |= F2FS_QUOTA_DEFAULT_FL;
3006         f2fs_set_inode_flags(inode);
3007         inode_unlock(inode);
3008         f2fs_mark_inode_dirty_sync(inode, false);
3009
3010         return 0;
3011 }
3012
3013 static int __f2fs_quota_off(struct super_block *sb, int type)
3014 {
3015         struct inode *inode = sb_dqopt(sb)->files[type];
3016         int err;
3017
3018         if (!inode || !igrab(inode))
3019                 return dquot_quota_off(sb, type);
3020
3021         err = f2fs_quota_sync(sb, type);
3022         if (err)
3023                 goto out_put;
3024
3025         err = dquot_quota_off(sb, type);
3026         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
3027                 goto out_put;
3028
3029         inode_lock(inode);
3030         F2FS_I(inode)->i_flags &= ~F2FS_QUOTA_DEFAULT_FL;
3031         f2fs_set_inode_flags(inode);
3032         inode_unlock(inode);
3033         f2fs_mark_inode_dirty_sync(inode, false);
3034 out_put:
3035         iput(inode);
3036         return err;
3037 }
3038
3039 static int f2fs_quota_off(struct super_block *sb, int type)
3040 {
3041         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3042         int err;
3043
3044         err = __f2fs_quota_off(sb, type);
3045
3046         /*
3047          * quotactl can shutdown journalled quota, result in inconsistence
3048          * between quota record and fs data by following updates, tag the
3049          * flag to let fsck be aware of it.
3050          */
3051         if (is_journalled_quota(sbi))
3052                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3053         return err;
3054 }
3055
3056 void f2fs_quota_off_umount(struct super_block *sb)
3057 {
3058         int type;
3059         int err;
3060
3061         for (type = 0; type < MAXQUOTAS; type++) {
3062                 err = __f2fs_quota_off(sb, type);
3063                 if (err) {
3064                         int ret = dquot_quota_off(sb, type);
3065
3066                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
3067                                  type, err, ret);
3068                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
3069                 }
3070         }
3071         /*
3072          * In case of checkpoint=disable, we must flush quota blocks.
3073          * This can cause NULL exception for node_inode in end_io, since
3074          * put_super already dropped it.
3075          */
3076         sync_filesystem(sb);
3077 }
3078
3079 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
3080 {
3081         struct quota_info *dqopt = sb_dqopt(sb);
3082         int type;
3083
3084         for (type = 0; type < MAXQUOTAS; type++) {
3085                 if (!dqopt->files[type])
3086                         continue;
3087                 f2fs_inode_synced(dqopt->files[type]);
3088         }
3089 }
3090
3091 static int f2fs_dquot_commit(struct dquot *dquot)
3092 {
3093         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3094         int ret;
3095
3096         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
3097         ret = dquot_commit(dquot);
3098         if (ret < 0)
3099                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3100         f2fs_up_read(&sbi->quota_sem);
3101         return ret;
3102 }
3103
3104 static int f2fs_dquot_acquire(struct dquot *dquot)
3105 {
3106         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3107         int ret;
3108
3109         f2fs_down_read(&sbi->quota_sem);
3110         ret = dquot_acquire(dquot);
3111         if (ret < 0)
3112                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3113         f2fs_up_read(&sbi->quota_sem);
3114         return ret;
3115 }
3116
3117 static int f2fs_dquot_release(struct dquot *dquot)
3118 {
3119         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3120         int ret = dquot_release(dquot);
3121
3122         if (ret < 0)
3123                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3124         return ret;
3125 }
3126
3127 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
3128 {
3129         struct super_block *sb = dquot->dq_sb;
3130         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3131         int ret = dquot_mark_dquot_dirty(dquot);
3132
3133         /* if we are using journalled quota */
3134         if (is_journalled_quota(sbi))
3135                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
3136
3137         return ret;
3138 }
3139
3140 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
3141 {
3142         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3143         int ret = dquot_commit_info(sb, type);
3144
3145         if (ret < 0)
3146                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3147         return ret;
3148 }
3149
3150 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
3151 {
3152         *projid = F2FS_I(inode)->i_projid;
3153         return 0;
3154 }
3155
3156 static const struct dquot_operations f2fs_quota_operations = {
3157         .get_reserved_space = f2fs_get_reserved_space,
3158         .write_dquot    = f2fs_dquot_commit,
3159         .acquire_dquot  = f2fs_dquot_acquire,
3160         .release_dquot  = f2fs_dquot_release,
3161         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
3162         .write_info     = f2fs_dquot_commit_info,
3163         .alloc_dquot    = dquot_alloc,
3164         .destroy_dquot  = dquot_destroy,
3165         .get_projid     = f2fs_get_projid,
3166         .get_next_id    = dquot_get_next_id,
3167 };
3168
3169 static const struct quotactl_ops f2fs_quotactl_ops = {
3170         .quota_on       = f2fs_quota_on,
3171         .quota_off      = f2fs_quota_off,
3172         .quota_sync     = f2fs_quota_sync,
3173         .get_state      = dquot_get_state,
3174         .set_info       = dquot_set_dqinfo,
3175         .get_dqblk      = dquot_get_dqblk,
3176         .set_dqblk      = dquot_set_dqblk,
3177         .get_nextdqblk  = dquot_get_next_dqblk,
3178 };
3179 #else
3180 int f2fs_dquot_initialize(struct inode *inode)
3181 {
3182         return 0;
3183 }
3184
3185 int f2fs_quota_sync(struct super_block *sb, int type)
3186 {
3187         return 0;
3188 }
3189
3190 void f2fs_quota_off_umount(struct super_block *sb)
3191 {
3192 }
3193 #endif
3194
3195 static const struct super_operations f2fs_sops = {
3196         .alloc_inode    = f2fs_alloc_inode,
3197         .free_inode     = f2fs_free_inode,
3198         .drop_inode     = f2fs_drop_inode,
3199         .write_inode    = f2fs_write_inode,
3200         .dirty_inode    = f2fs_dirty_inode,
3201         .show_options   = f2fs_show_options,
3202 #ifdef CONFIG_QUOTA
3203         .quota_read     = f2fs_quota_read,
3204         .quota_write    = f2fs_quota_write,
3205         .get_dquots     = f2fs_get_dquots,
3206 #endif
3207         .evict_inode    = f2fs_evict_inode,
3208         .put_super      = f2fs_put_super,
3209         .sync_fs        = f2fs_sync_fs,
3210         .freeze_fs      = f2fs_freeze,
3211         .unfreeze_fs    = f2fs_unfreeze,
3212         .statfs         = f2fs_statfs,
3213         .remount_fs     = f2fs_remount,
3214 };
3215
3216 #ifdef CONFIG_FS_ENCRYPTION
3217 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3218 {
3219         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3220                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3221                                 ctx, len, NULL);
3222 }
3223
3224 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3225                                                         void *fs_data)
3226 {
3227         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3228
3229         /*
3230          * Encrypting the root directory is not allowed because fsck
3231          * expects lost+found directory to exist and remain unencrypted
3232          * if LOST_FOUND feature is enabled.
3233          *
3234          */
3235         if (f2fs_sb_has_lost_found(sbi) &&
3236                         inode->i_ino == F2FS_ROOT_INO(sbi))
3237                 return -EPERM;
3238
3239         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3240                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3241                                 ctx, len, fs_data, XATTR_CREATE);
3242 }
3243
3244 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3245 {
3246         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3247 }
3248
3249 static bool f2fs_has_stable_inodes(struct super_block *sb)
3250 {
3251         return true;
3252 }
3253
3254 static struct block_device **f2fs_get_devices(struct super_block *sb,
3255                                               unsigned int *num_devs)
3256 {
3257         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3258         struct block_device **devs;
3259         int i;
3260
3261         if (!f2fs_is_multi_device(sbi))
3262                 return NULL;
3263
3264         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3265         if (!devs)
3266                 return ERR_PTR(-ENOMEM);
3267
3268         for (i = 0; i < sbi->s_ndevs; i++)
3269                 devs[i] = FDEV(i).bdev;
3270         *num_devs = sbi->s_ndevs;
3271         return devs;
3272 }
3273
3274 static const struct fscrypt_operations f2fs_cryptops = {
3275         .needs_bounce_pages     = 1,
3276         .has_32bit_inodes       = 1,
3277         .supports_subblock_data_units = 1,
3278         .legacy_key_prefix      = "f2fs:",
3279         .get_context            = f2fs_get_context,
3280         .set_context            = f2fs_set_context,
3281         .get_dummy_policy       = f2fs_get_dummy_policy,
3282         .empty_dir              = f2fs_empty_dir,
3283         .has_stable_inodes      = f2fs_has_stable_inodes,
3284         .get_devices            = f2fs_get_devices,
3285 };
3286 #endif
3287
3288 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3289                 u64 ino, u32 generation)
3290 {
3291         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3292         struct inode *inode;
3293
3294         if (f2fs_check_nid_range(sbi, ino))
3295                 return ERR_PTR(-ESTALE);
3296
3297         /*
3298          * f2fs_iget isn't quite right if the inode is currently unallocated!
3299          * However f2fs_iget currently does appropriate checks to handle stale
3300          * inodes so everything is OK.
3301          */
3302         inode = f2fs_iget(sb, ino);
3303         if (IS_ERR(inode))
3304                 return ERR_CAST(inode);
3305         if (unlikely(generation && inode->i_generation != generation)) {
3306                 /* we didn't find the right inode.. */
3307                 iput(inode);
3308                 return ERR_PTR(-ESTALE);
3309         }
3310         return inode;
3311 }
3312
3313 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3314                 int fh_len, int fh_type)
3315 {
3316         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3317                                     f2fs_nfs_get_inode);
3318 }
3319
3320 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3321                 int fh_len, int fh_type)
3322 {
3323         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3324                                     f2fs_nfs_get_inode);
3325 }
3326
3327 static const struct export_operations f2fs_export_ops = {
3328         .encode_fh = generic_encode_ino32_fh,
3329         .fh_to_dentry = f2fs_fh_to_dentry,
3330         .fh_to_parent = f2fs_fh_to_parent,
3331         .get_parent = f2fs_get_parent,
3332 };
3333
3334 loff_t max_file_blocks(struct inode *inode)
3335 {
3336         loff_t result = 0;
3337         loff_t leaf_count;
3338
3339         /*
3340          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3341          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3342          * space in inode.i_addr, it will be more safe to reassign
3343          * result as zero.
3344          */
3345
3346         if (inode && f2fs_compressed_file(inode))
3347                 leaf_count = ADDRS_PER_BLOCK(inode);
3348         else
3349                 leaf_count = DEF_ADDRS_PER_BLOCK;
3350
3351         /* two direct node blocks */
3352         result += (leaf_count * 2);
3353
3354         /* two indirect node blocks */
3355         leaf_count *= NIDS_PER_BLOCK;
3356         result += (leaf_count * 2);
3357
3358         /* one double indirect node block */
3359         leaf_count *= NIDS_PER_BLOCK;
3360         result += leaf_count;
3361
3362         return result;
3363 }
3364
3365 static int __f2fs_commit_super(struct buffer_head *bh,
3366                         struct f2fs_super_block *super)
3367 {
3368         lock_buffer(bh);
3369         if (super)
3370                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3371         set_buffer_dirty(bh);
3372         unlock_buffer(bh);
3373
3374         /* it's rare case, we can do fua all the time */
3375         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3376 }
3377
3378 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3379                                         struct buffer_head *bh)
3380 {
3381         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3382                                         (bh->b_data + F2FS_SUPER_OFFSET);
3383         struct super_block *sb = sbi->sb;
3384         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3385         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3386         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3387         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3388         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3389         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3390         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3391         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3392         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3393         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3394         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3395         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3396         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3397         u64 main_end_blkaddr = main_blkaddr +
3398                                 (segment_count_main << log_blocks_per_seg);
3399         u64 seg_end_blkaddr = segment0_blkaddr +
3400                                 (segment_count << log_blocks_per_seg);
3401
3402         if (segment0_blkaddr != cp_blkaddr) {
3403                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3404                           segment0_blkaddr, cp_blkaddr);
3405                 return true;
3406         }
3407
3408         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3409                                                         sit_blkaddr) {
3410                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3411                           cp_blkaddr, sit_blkaddr,
3412                           segment_count_ckpt << log_blocks_per_seg);
3413                 return true;
3414         }
3415
3416         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3417                                                         nat_blkaddr) {
3418                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3419                           sit_blkaddr, nat_blkaddr,
3420                           segment_count_sit << log_blocks_per_seg);
3421                 return true;
3422         }
3423
3424         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3425                                                         ssa_blkaddr) {
3426                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3427                           nat_blkaddr, ssa_blkaddr,
3428                           segment_count_nat << log_blocks_per_seg);
3429                 return true;
3430         }
3431
3432         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3433                                                         main_blkaddr) {
3434                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3435                           ssa_blkaddr, main_blkaddr,
3436                           segment_count_ssa << log_blocks_per_seg);
3437                 return true;
3438         }
3439
3440         if (main_end_blkaddr > seg_end_blkaddr) {
3441                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3442                           main_blkaddr, seg_end_blkaddr,
3443                           segment_count_main << log_blocks_per_seg);
3444                 return true;
3445         } else if (main_end_blkaddr < seg_end_blkaddr) {
3446                 int err = 0;
3447                 char *res;
3448
3449                 /* fix in-memory information all the time */
3450                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3451                                 segment0_blkaddr) >> log_blocks_per_seg);
3452
3453                 if (f2fs_readonly(sb) || f2fs_hw_is_readonly(sbi)) {
3454                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3455                         res = "internally";
3456                 } else {
3457                         err = __f2fs_commit_super(bh, NULL);
3458                         res = err ? "failed" : "done";
3459                 }
3460                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3461                           res, main_blkaddr, seg_end_blkaddr,
3462                           segment_count_main << log_blocks_per_seg);
3463                 if (err)
3464                         return true;
3465         }
3466         return false;
3467 }
3468
3469 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3470                                 struct buffer_head *bh)
3471 {
3472         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3473         block_t total_sections, blocks_per_seg;
3474         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3475                                         (bh->b_data + F2FS_SUPER_OFFSET);
3476         size_t crc_offset = 0;
3477         __u32 crc = 0;
3478
3479         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3480                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3481                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3482                 return -EINVAL;
3483         }
3484
3485         /* Check checksum_offset and crc in superblock */
3486         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3487                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3488                 if (crc_offset !=
3489                         offsetof(struct f2fs_super_block, crc)) {
3490                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3491                                   crc_offset);
3492                         return -EFSCORRUPTED;
3493                 }
3494                 crc = le32_to_cpu(raw_super->crc);
3495                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3496                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3497                         return -EFSCORRUPTED;
3498                 }
3499         }
3500
3501         /* Currently, support only 4KB block size */
3502         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3503                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3504                           le32_to_cpu(raw_super->log_blocksize),
3505                           F2FS_BLKSIZE_BITS);
3506                 return -EFSCORRUPTED;
3507         }
3508
3509         /* check log blocks per segment */
3510         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3511                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3512                           le32_to_cpu(raw_super->log_blocks_per_seg));
3513                 return -EFSCORRUPTED;
3514         }
3515
3516         /* Currently, support 512/1024/2048/4096/16K bytes sector size */
3517         if (le32_to_cpu(raw_super->log_sectorsize) >
3518                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3519                 le32_to_cpu(raw_super->log_sectorsize) <
3520                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3521                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3522                           le32_to_cpu(raw_super->log_sectorsize));
3523                 return -EFSCORRUPTED;
3524         }
3525         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3526                 le32_to_cpu(raw_super->log_sectorsize) !=
3527                         F2FS_MAX_LOG_SECTOR_SIZE) {
3528                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3529                           le32_to_cpu(raw_super->log_sectors_per_block),
3530                           le32_to_cpu(raw_super->log_sectorsize));
3531                 return -EFSCORRUPTED;
3532         }
3533
3534         segment_count = le32_to_cpu(raw_super->segment_count);
3535         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3536         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3537         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3538         total_sections = le32_to_cpu(raw_super->section_count);
3539
3540         /* blocks_per_seg should be 512, given the above check */
3541         blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg));
3542
3543         if (segment_count > F2FS_MAX_SEGMENT ||
3544                                 segment_count < F2FS_MIN_SEGMENTS) {
3545                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3546                 return -EFSCORRUPTED;
3547         }
3548
3549         if (total_sections > segment_count_main || total_sections < 1 ||
3550                         segs_per_sec > segment_count || !segs_per_sec) {
3551                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3552                           segment_count, total_sections, segs_per_sec);
3553                 return -EFSCORRUPTED;
3554         }
3555
3556         if (segment_count_main != total_sections * segs_per_sec) {
3557                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3558                           segment_count_main, total_sections, segs_per_sec);
3559                 return -EFSCORRUPTED;
3560         }
3561
3562         if ((segment_count / segs_per_sec) < total_sections) {
3563                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3564                           segment_count, segs_per_sec, total_sections);
3565                 return -EFSCORRUPTED;
3566         }
3567
3568         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3569                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3570                           segment_count, le64_to_cpu(raw_super->block_count));
3571                 return -EFSCORRUPTED;
3572         }
3573
3574         if (RDEV(0).path[0]) {
3575                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3576                 int i = 1;
3577
3578                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3579                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3580                         i++;
3581                 }
3582                 if (segment_count != dev_seg_count) {
3583                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3584                                         segment_count, dev_seg_count);
3585                         return -EFSCORRUPTED;
3586                 }
3587         } else {
3588                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3589                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3590                         f2fs_info(sbi, "Zoned block device path is missing");
3591                         return -EFSCORRUPTED;
3592                 }
3593         }
3594
3595         if (secs_per_zone > total_sections || !secs_per_zone) {
3596                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3597                           secs_per_zone, total_sections);
3598                 return -EFSCORRUPTED;
3599         }
3600         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3601                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3602                         (le32_to_cpu(raw_super->extension_count) +
3603                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3604                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3605                           le32_to_cpu(raw_super->extension_count),
3606                           raw_super->hot_ext_count,
3607                           F2FS_MAX_EXTENSION);
3608                 return -EFSCORRUPTED;
3609         }
3610
3611         if (le32_to_cpu(raw_super->cp_payload) >=
3612                                 (blocks_per_seg - F2FS_CP_PACKS -
3613                                 NR_CURSEG_PERSIST_TYPE)) {
3614                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3615                           le32_to_cpu(raw_super->cp_payload),
3616                           blocks_per_seg - F2FS_CP_PACKS -
3617                           NR_CURSEG_PERSIST_TYPE);
3618                 return -EFSCORRUPTED;
3619         }
3620
3621         /* check reserved ino info */
3622         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3623                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3624                 le32_to_cpu(raw_super->root_ino) != 3) {
3625                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3626                           le32_to_cpu(raw_super->node_ino),
3627                           le32_to_cpu(raw_super->meta_ino),
3628                           le32_to_cpu(raw_super->root_ino));
3629                 return -EFSCORRUPTED;
3630         }
3631
3632         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3633         if (sanity_check_area_boundary(sbi, bh))
3634                 return -EFSCORRUPTED;
3635
3636         return 0;
3637 }
3638
3639 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3640 {
3641         unsigned int total, fsmeta;
3642         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3643         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3644         unsigned int ovp_segments, reserved_segments;
3645         unsigned int main_segs, blocks_per_seg;
3646         unsigned int sit_segs, nat_segs;
3647         unsigned int sit_bitmap_size, nat_bitmap_size;
3648         unsigned int log_blocks_per_seg;
3649         unsigned int segment_count_main;
3650         unsigned int cp_pack_start_sum, cp_payload;
3651         block_t user_block_count, valid_user_blocks;
3652         block_t avail_node_count, valid_node_count;
3653         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3654         int i, j;
3655
3656         total = le32_to_cpu(raw_super->segment_count);
3657         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3658         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3659         fsmeta += sit_segs;
3660         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3661         fsmeta += nat_segs;
3662         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3663         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3664
3665         if (unlikely(fsmeta >= total))
3666                 return 1;
3667
3668         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3669         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3670
3671         if (!f2fs_sb_has_readonly(sbi) &&
3672                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3673                         ovp_segments == 0 || reserved_segments == 0)) {
3674                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3675                 return 1;
3676         }
3677         user_block_count = le64_to_cpu(ckpt->user_block_count);
3678         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3679                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3680         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3681         if (!user_block_count || user_block_count >=
3682                         segment_count_main << log_blocks_per_seg) {
3683                 f2fs_err(sbi, "Wrong user_block_count: %u",
3684                          user_block_count);
3685                 return 1;
3686         }
3687
3688         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3689         if (valid_user_blocks > user_block_count) {
3690                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3691                          valid_user_blocks, user_block_count);
3692                 return 1;
3693         }
3694
3695         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3696         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3697         if (valid_node_count > avail_node_count) {
3698                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3699                          valid_node_count, avail_node_count);
3700                 return 1;
3701         }
3702
3703         main_segs = le32_to_cpu(raw_super->segment_count_main);
3704         blocks_per_seg = sbi->blocks_per_seg;
3705
3706         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3707                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3708                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3709                         return 1;
3710
3711                 if (f2fs_sb_has_readonly(sbi))
3712                         goto check_data;
3713
3714                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3715                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3716                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3717                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3718                                          i, j,
3719                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3720                                 return 1;
3721                         }
3722                 }
3723         }
3724 check_data:
3725         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3726                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3727                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3728                         return 1;
3729
3730                 if (f2fs_sb_has_readonly(sbi))
3731                         goto skip_cross;
3732
3733                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3734                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3735                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3736                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3737                                          i, j,
3738                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3739                                 return 1;
3740                         }
3741                 }
3742         }
3743         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3744                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3745                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3746                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3747                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3748                                          i, j,
3749                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3750                                 return 1;
3751                         }
3752                 }
3753         }
3754 skip_cross:
3755         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3756         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3757
3758         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3759                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3760                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3761                          sit_bitmap_size, nat_bitmap_size);
3762                 return 1;
3763         }
3764
3765         cp_pack_start_sum = __start_sum_addr(sbi);
3766         cp_payload = __cp_payload(sbi);
3767         if (cp_pack_start_sum < cp_payload + 1 ||
3768                 cp_pack_start_sum > blocks_per_seg - 1 -
3769                         NR_CURSEG_PERSIST_TYPE) {
3770                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3771                          cp_pack_start_sum);
3772                 return 1;
3773         }
3774
3775         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3776                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3777                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3778                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3779                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3780                           le32_to_cpu(ckpt->checksum_offset));
3781                 return 1;
3782         }
3783
3784         nat_blocks = nat_segs << log_blocks_per_seg;
3785         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3786         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3787         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3788                 (cp_payload + F2FS_CP_PACKS +
3789                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3790                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3791                           cp_payload, nat_bits_blocks);
3792                 return 1;
3793         }
3794
3795         if (unlikely(f2fs_cp_error(sbi))) {
3796                 f2fs_err(sbi, "A bug case: need to run fsck");
3797                 return 1;
3798         }
3799         return 0;
3800 }
3801
3802 static void init_sb_info(struct f2fs_sb_info *sbi)
3803 {
3804         struct f2fs_super_block *raw_super = sbi->raw_super;
3805         int i;
3806
3807         sbi->log_sectors_per_block =
3808                 le32_to_cpu(raw_super->log_sectors_per_block);
3809         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3810         sbi->blocksize = BIT(sbi->log_blocksize);
3811         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3812         sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg);
3813         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3814         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3815         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3816         sbi->total_node_count =
3817                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3818                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3819         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3820         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3821         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3822         sbi->cur_victim_sec = NULL_SECNO;
3823         sbi->gc_mode = GC_NORMAL;
3824         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3825         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3826         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3827         sbi->migration_granularity = sbi->segs_per_sec;
3828         sbi->seq_file_ra_mul = MIN_RA_MUL;
3829         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3830         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3831         spin_lock_init(&sbi->gc_remaining_trials_lock);
3832         atomic64_set(&sbi->current_atomic_write, 0);
3833
3834         sbi->dir_level = DEF_DIR_LEVEL;
3835         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3836         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3837         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3838         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3839         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3840         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3841                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3842         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3843
3844         for (i = 0; i < NR_COUNT_TYPE; i++)
3845                 atomic_set(&sbi->nr_pages[i], 0);
3846
3847         for (i = 0; i < META; i++)
3848                 atomic_set(&sbi->wb_sync_req[i], 0);
3849
3850         INIT_LIST_HEAD(&sbi->s_list);
3851         mutex_init(&sbi->umount_mutex);
3852         init_f2fs_rwsem(&sbi->io_order_lock);
3853         spin_lock_init(&sbi->cp_lock);
3854
3855         sbi->dirty_device = 0;
3856         spin_lock_init(&sbi->dev_lock);
3857
3858         init_f2fs_rwsem(&sbi->sb_lock);
3859         init_f2fs_rwsem(&sbi->pin_sem);
3860 }
3861
3862 static int init_percpu_info(struct f2fs_sb_info *sbi)
3863 {
3864         int err;
3865
3866         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3867         if (err)
3868                 return err;
3869
3870         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3871         if (err)
3872                 goto err_valid_block;
3873
3874         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3875                                                                 GFP_KERNEL);
3876         if (err)
3877                 goto err_node_block;
3878         return 0;
3879
3880 err_node_block:
3881         percpu_counter_destroy(&sbi->rf_node_block_count);
3882 err_valid_block:
3883         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3884         return err;
3885 }
3886
3887 #ifdef CONFIG_BLK_DEV_ZONED
3888
3889 struct f2fs_report_zones_args {
3890         struct f2fs_sb_info *sbi;
3891         struct f2fs_dev_info *dev;
3892 };
3893
3894 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3895                               void *data)
3896 {
3897         struct f2fs_report_zones_args *rz_args = data;
3898         block_t unusable_blocks = (zone->len - zone->capacity) >>
3899                                         F2FS_LOG_SECTORS_PER_BLOCK;
3900
3901         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3902                 return 0;
3903
3904         set_bit(idx, rz_args->dev->blkz_seq);
3905         if (!rz_args->sbi->unusable_blocks_per_sec) {
3906                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3907                 return 0;
3908         }
3909         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3910                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3911                 return -EINVAL;
3912         }
3913         return 0;
3914 }
3915
3916 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3917 {
3918         struct block_device *bdev = FDEV(devi).bdev;
3919         sector_t nr_sectors = bdev_nr_sectors(bdev);
3920         struct f2fs_report_zones_args rep_zone_arg;
3921         u64 zone_sectors;
3922         int ret;
3923
3924         if (!f2fs_sb_has_blkzoned(sbi))
3925                 return 0;
3926
3927         zone_sectors = bdev_zone_sectors(bdev);
3928         if (!is_power_of_2(zone_sectors)) {
3929                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3930                 return -EINVAL;
3931         }
3932
3933         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3934                                 SECTOR_TO_BLOCK(zone_sectors))
3935                 return -EINVAL;
3936         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3937         FDEV(devi).nr_blkz = div_u64(SECTOR_TO_BLOCK(nr_sectors),
3938                                         sbi->blocks_per_blkz);
3939         if (nr_sectors & (zone_sectors - 1))
3940                 FDEV(devi).nr_blkz++;
3941
3942         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3943                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3944                                         * sizeof(unsigned long),
3945                                         GFP_KERNEL);
3946         if (!FDEV(devi).blkz_seq)
3947                 return -ENOMEM;
3948
3949         rep_zone_arg.sbi = sbi;
3950         rep_zone_arg.dev = &FDEV(devi);
3951
3952         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3953                                   &rep_zone_arg);
3954         if (ret < 0)
3955                 return ret;
3956         return 0;
3957 }
3958 #endif
3959
3960 /*
3961  * Read f2fs raw super block.
3962  * Because we have two copies of super block, so read both of them
3963  * to get the first valid one. If any one of them is broken, we pass
3964  * them recovery flag back to the caller.
3965  */
3966 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3967                         struct f2fs_super_block **raw_super,
3968                         int *valid_super_block, int *recovery)
3969 {
3970         struct super_block *sb = sbi->sb;
3971         int block;
3972         struct buffer_head *bh;
3973         struct f2fs_super_block *super;
3974         int err = 0;
3975
3976         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3977         if (!super)
3978                 return -ENOMEM;
3979
3980         for (block = 0; block < 2; block++) {
3981                 bh = sb_bread(sb, block);
3982                 if (!bh) {
3983                         f2fs_err(sbi, "Unable to read %dth superblock",
3984                                  block + 1);
3985                         err = -EIO;
3986                         *recovery = 1;
3987                         continue;
3988                 }
3989
3990                 /* sanity checking of raw super */
3991                 err = sanity_check_raw_super(sbi, bh);
3992                 if (err) {
3993                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3994                                  block + 1);
3995                         brelse(bh);
3996                         *recovery = 1;
3997                         continue;
3998                 }
3999
4000                 if (!*raw_super) {
4001                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
4002                                                         sizeof(*super));
4003                         *valid_super_block = block;
4004                         *raw_super = super;
4005                 }
4006                 brelse(bh);
4007         }
4008
4009         /* No valid superblock */
4010         if (!*raw_super)
4011                 kfree(super);
4012         else
4013                 err = 0;
4014
4015         return err;
4016 }
4017
4018 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
4019 {
4020         struct buffer_head *bh;
4021         __u32 crc = 0;
4022         int err;
4023
4024         if ((recover && f2fs_readonly(sbi->sb)) ||
4025                                 f2fs_hw_is_readonly(sbi)) {
4026                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
4027                 return -EROFS;
4028         }
4029
4030         /* we should update superblock crc here */
4031         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
4032                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
4033                                 offsetof(struct f2fs_super_block, crc));
4034                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
4035         }
4036
4037         /* write back-up superblock first */
4038         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
4039         if (!bh)
4040                 return -EIO;
4041         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
4042         brelse(bh);
4043
4044         /* if we are in recovery path, skip writing valid superblock */
4045         if (recover || err)
4046                 return err;
4047
4048         /* write current valid superblock */
4049         bh = sb_bread(sbi->sb, sbi->valid_super_block);
4050         if (!bh)
4051                 return -EIO;
4052         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
4053         brelse(bh);
4054         return err;
4055 }
4056
4057 static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
4058 {
4059         unsigned long flags;
4060
4061         spin_lock_irqsave(&sbi->error_lock, flags);
4062         if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
4063                 sbi->stop_reason[reason]++;
4064         spin_unlock_irqrestore(&sbi->error_lock, flags);
4065 }
4066
4067 static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
4068 {
4069         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4070         unsigned long flags;
4071         int err;
4072
4073         f2fs_down_write(&sbi->sb_lock);
4074
4075         spin_lock_irqsave(&sbi->error_lock, flags);
4076         if (sbi->error_dirty) {
4077                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4078                                                         MAX_F2FS_ERRORS);
4079                 sbi->error_dirty = false;
4080         }
4081         memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
4082         spin_unlock_irqrestore(&sbi->error_lock, flags);
4083
4084         err = f2fs_commit_super(sbi, false);
4085
4086         f2fs_up_write(&sbi->sb_lock);
4087         if (err)
4088                 f2fs_err(sbi, "f2fs_commit_super fails to record err:%d", err);
4089 }
4090
4091 void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
4092 {
4093         unsigned long flags;
4094
4095         spin_lock_irqsave(&sbi->error_lock, flags);
4096         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
4097                 set_bit(flag, (unsigned long *)sbi->errors);
4098                 sbi->error_dirty = true;
4099         }
4100         spin_unlock_irqrestore(&sbi->error_lock, flags);
4101 }
4102
4103 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
4104 {
4105         unsigned long flags;
4106         bool need_update = false;
4107
4108         spin_lock_irqsave(&sbi->error_lock, flags);
4109         if (sbi->error_dirty) {
4110                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4111                                                         MAX_F2FS_ERRORS);
4112                 sbi->error_dirty = false;
4113                 need_update = true;
4114         }
4115         spin_unlock_irqrestore(&sbi->error_lock, flags);
4116
4117         return need_update;
4118 }
4119
4120 static void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error)
4121 {
4122         int err;
4123
4124         f2fs_down_write(&sbi->sb_lock);
4125
4126         if (!f2fs_update_errors(sbi))
4127                 goto out_unlock;
4128
4129         err = f2fs_commit_super(sbi, false);
4130         if (err)
4131                 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d",
4132                                                                 error, err);
4133 out_unlock:
4134         f2fs_up_write(&sbi->sb_lock);
4135 }
4136
4137 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
4138 {
4139         f2fs_save_errors(sbi, error);
4140         f2fs_record_errors(sbi, error);
4141 }
4142
4143 void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error)
4144 {
4145         f2fs_save_errors(sbi, error);
4146
4147         if (!sbi->error_dirty)
4148                 return;
4149         if (!test_bit(error, (unsigned long *)sbi->errors))
4150                 return;
4151         schedule_work(&sbi->s_error_work);
4152 }
4153
4154 static bool system_going_down(void)
4155 {
4156         return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
4157                 || system_state == SYSTEM_RESTART;
4158 }
4159
4160 void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
4161                                                         bool irq_context)
4162 {
4163         struct super_block *sb = sbi->sb;
4164         bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
4165         bool continue_fs = !shutdown &&
4166                         F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
4167
4168         set_ckpt_flags(sbi, CP_ERROR_FLAG);
4169
4170         if (!f2fs_hw_is_readonly(sbi)) {
4171                 save_stop_reason(sbi, reason);
4172
4173                 if (irq_context && !shutdown)
4174                         schedule_work(&sbi->s_error_work);
4175                 else
4176                         f2fs_record_stop_reason(sbi);
4177         }
4178
4179         /*
4180          * We force ERRORS_RO behavior when system is rebooting. Otherwise we
4181          * could panic during 'reboot -f' as the underlying device got already
4182          * disabled.
4183          */
4184         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
4185                                 !shutdown && !system_going_down() &&
4186                                 !is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN))
4187                 panic("F2FS-fs (device %s): panic forced after error\n",
4188                                                         sb->s_id);
4189
4190         if (shutdown)
4191                 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
4192
4193         /* continue filesystem operators if errors=continue */
4194         if (continue_fs || f2fs_readonly(sb))
4195                 return;
4196
4197         f2fs_warn(sbi, "Remounting filesystem read-only");
4198         /*
4199          * Make sure updated value of ->s_mount_flags will be visible before
4200          * ->s_flags update
4201          */
4202         smp_wmb();
4203         sb->s_flags |= SB_RDONLY;
4204 }
4205
4206 static void f2fs_record_error_work(struct work_struct *work)
4207 {
4208         struct f2fs_sb_info *sbi = container_of(work,
4209                                         struct f2fs_sb_info, s_error_work);
4210
4211         f2fs_record_stop_reason(sbi);
4212 }
4213
4214 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
4215 {
4216         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4217         unsigned int max_devices = MAX_DEVICES;
4218         unsigned int logical_blksize;
4219         blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
4220         int i;
4221
4222         /* Initialize single device information */
4223         if (!RDEV(0).path[0]) {
4224                 if (!bdev_is_zoned(sbi->sb->s_bdev))
4225                         return 0;
4226                 max_devices = 1;
4227         }
4228
4229         /*
4230          * Initialize multiple devices information, or single
4231          * zoned block device information.
4232          */
4233         sbi->devs = f2fs_kzalloc(sbi,
4234                                  array_size(max_devices,
4235                                             sizeof(struct f2fs_dev_info)),
4236                                  GFP_KERNEL);
4237         if (!sbi->devs)
4238                 return -ENOMEM;
4239
4240         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
4241         sbi->aligned_blksize = true;
4242
4243         for (i = 0; i < max_devices; i++) {
4244                 if (i == 0)
4245                         FDEV(0).bdev_handle = sbi->sb->s_bdev_handle;
4246                 else if (!RDEV(i).path[0])
4247                         break;
4248
4249                 if (max_devices > 1) {
4250                         /* Multi-device mount */
4251                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
4252                         FDEV(i).total_segments =
4253                                 le32_to_cpu(RDEV(i).total_segments);
4254                         if (i == 0) {
4255                                 FDEV(i).start_blk = 0;
4256                                 FDEV(i).end_blk = FDEV(i).start_blk +
4257                                     (FDEV(i).total_segments <<
4258                                     sbi->log_blocks_per_seg) - 1 +
4259                                     le32_to_cpu(raw_super->segment0_blkaddr);
4260                         } else {
4261                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
4262                                 FDEV(i).end_blk = FDEV(i).start_blk +
4263                                         (FDEV(i).total_segments <<
4264                                         sbi->log_blocks_per_seg) - 1;
4265                                 FDEV(i).bdev_handle = bdev_open_by_path(
4266                                         FDEV(i).path, mode, sbi->sb, NULL);
4267                         }
4268                 }
4269                 if (IS_ERR(FDEV(i).bdev_handle))
4270                         return PTR_ERR(FDEV(i).bdev_handle);
4271
4272                 FDEV(i).bdev = FDEV(i).bdev_handle->bdev;
4273                 /* to release errored devices */
4274                 sbi->s_ndevs = i + 1;
4275
4276                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4277                         sbi->aligned_blksize = false;
4278
4279 #ifdef CONFIG_BLK_DEV_ZONED
4280                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
4281                                 !f2fs_sb_has_blkzoned(sbi)) {
4282                         f2fs_err(sbi, "Zoned block device feature not enabled");
4283                         return -EINVAL;
4284                 }
4285                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
4286                         if (init_blkz_info(sbi, i)) {
4287                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
4288                                 return -EINVAL;
4289                         }
4290                         if (max_devices == 1)
4291                                 break;
4292                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
4293                                   i, FDEV(i).path,
4294                                   FDEV(i).total_segments,
4295                                   FDEV(i).start_blk, FDEV(i).end_blk,
4296                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
4297                                   "Host-aware" : "Host-managed");
4298                         continue;
4299                 }
4300 #endif
4301                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4302                           i, FDEV(i).path,
4303                           FDEV(i).total_segments,
4304                           FDEV(i).start_blk, FDEV(i).end_blk);
4305         }
4306         f2fs_info(sbi,
4307                   "IO Block Size: %8ld KB", F2FS_IO_SIZE_KB(sbi));
4308         return 0;
4309 }
4310
4311 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4312 {
4313 #if IS_ENABLED(CONFIG_UNICODE)
4314         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4315                 const struct f2fs_sb_encodings *encoding_info;
4316                 struct unicode_map *encoding;
4317                 __u16 encoding_flags;
4318
4319                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4320                 if (!encoding_info) {
4321                         f2fs_err(sbi,
4322                                  "Encoding requested by superblock is unknown");
4323                         return -EINVAL;
4324                 }
4325
4326                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4327                 encoding = utf8_load(encoding_info->version);
4328                 if (IS_ERR(encoding)) {
4329                         f2fs_err(sbi,
4330                                  "can't mount with superblock charset: %s-%u.%u.%u "
4331                                  "not supported by the kernel. flags: 0x%x.",
4332                                  encoding_info->name,
4333                                  unicode_major(encoding_info->version),
4334                                  unicode_minor(encoding_info->version),
4335                                  unicode_rev(encoding_info->version),
4336                                  encoding_flags);
4337                         return PTR_ERR(encoding);
4338                 }
4339                 f2fs_info(sbi, "Using encoding defined by superblock: "
4340                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4341                          unicode_major(encoding_info->version),
4342                          unicode_minor(encoding_info->version),
4343                          unicode_rev(encoding_info->version),
4344                          encoding_flags);
4345
4346                 sbi->sb->s_encoding = encoding;
4347                 sbi->sb->s_encoding_flags = encoding_flags;
4348         }
4349 #else
4350         if (f2fs_sb_has_casefold(sbi)) {
4351                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4352                 return -EINVAL;
4353         }
4354 #endif
4355         return 0;
4356 }
4357
4358 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4359 {
4360         /* adjust parameters according to the volume size */
4361         if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4362                 if (f2fs_block_unit_discard(sbi))
4363                         SM_I(sbi)->dcc_info->discard_granularity =
4364                                                 MIN_DISCARD_GRANULARITY;
4365                 if (!f2fs_lfs_mode(sbi))
4366                         SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4367                                                 BIT(F2FS_IPU_HONOR_OPU_WRITE);
4368         }
4369
4370         sbi->readdir_ra = true;
4371 }
4372
4373 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4374 {
4375         struct f2fs_sb_info *sbi;
4376         struct f2fs_super_block *raw_super;
4377         struct inode *root;
4378         int err;
4379         bool skip_recovery = false, need_fsck = false;
4380         char *options = NULL;
4381         int recovery, i, valid_super_block;
4382         struct curseg_info *seg_i;
4383         int retry_cnt = 1;
4384 #ifdef CONFIG_QUOTA
4385         bool quota_enabled = false;
4386 #endif
4387
4388 try_onemore:
4389         err = -EINVAL;
4390         raw_super = NULL;
4391         valid_super_block = -1;
4392         recovery = 0;
4393
4394         /* allocate memory for f2fs-specific super block info */
4395         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4396         if (!sbi)
4397                 return -ENOMEM;
4398
4399         sbi->sb = sb;
4400
4401         /* initialize locks within allocated memory */
4402         init_f2fs_rwsem(&sbi->gc_lock);
4403         mutex_init(&sbi->writepages);
4404         init_f2fs_rwsem(&sbi->cp_global_sem);
4405         init_f2fs_rwsem(&sbi->node_write);
4406         init_f2fs_rwsem(&sbi->node_change);
4407         spin_lock_init(&sbi->stat_lock);
4408         init_f2fs_rwsem(&sbi->cp_rwsem);
4409         init_f2fs_rwsem(&sbi->quota_sem);
4410         init_waitqueue_head(&sbi->cp_wait);
4411         spin_lock_init(&sbi->error_lock);
4412
4413         for (i = 0; i < NR_INODE_TYPE; i++) {
4414                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4415                 spin_lock_init(&sbi->inode_lock[i]);
4416         }
4417         mutex_init(&sbi->flush_lock);
4418
4419         /* Load the checksum driver */
4420         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4421         if (IS_ERR(sbi->s_chksum_driver)) {
4422                 f2fs_err(sbi, "Cannot load crc32 driver.");
4423                 err = PTR_ERR(sbi->s_chksum_driver);
4424                 sbi->s_chksum_driver = NULL;
4425                 goto free_sbi;
4426         }
4427
4428         /* set a block size */
4429         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4430                 f2fs_err(sbi, "unable to set blocksize");
4431                 goto free_sbi;
4432         }
4433
4434         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4435                                                                 &recovery);
4436         if (err)
4437                 goto free_sbi;
4438
4439         sb->s_fs_info = sbi;
4440         sbi->raw_super = raw_super;
4441
4442         INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
4443         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4444         memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
4445
4446         /* precompute checksum seed for metadata */
4447         if (f2fs_sb_has_inode_chksum(sbi))
4448                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4449                                                 sizeof(raw_super->uuid));
4450
4451         default_options(sbi, false);
4452         /* parse mount options */
4453         options = kstrdup((const char *)data, GFP_KERNEL);
4454         if (data && !options) {
4455                 err = -ENOMEM;
4456                 goto free_sb_buf;
4457         }
4458
4459         err = parse_options(sb, options, false);
4460         if (err)
4461                 goto free_options;
4462
4463         sb->s_maxbytes = max_file_blocks(NULL) <<
4464                                 le32_to_cpu(raw_super->log_blocksize);
4465         sb->s_max_links = F2FS_LINK_MAX;
4466
4467         err = f2fs_setup_casefold(sbi);
4468         if (err)
4469                 goto free_options;
4470
4471 #ifdef CONFIG_QUOTA
4472         sb->dq_op = &f2fs_quota_operations;
4473         sb->s_qcop = &f2fs_quotactl_ops;
4474         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4475
4476         if (f2fs_sb_has_quota_ino(sbi)) {
4477                 for (i = 0; i < MAXQUOTAS; i++) {
4478                         if (f2fs_qf_ino(sbi->sb, i))
4479                                 sbi->nquota_files++;
4480                 }
4481         }
4482 #endif
4483
4484         sb->s_op = &f2fs_sops;
4485 #ifdef CONFIG_FS_ENCRYPTION
4486         sb->s_cop = &f2fs_cryptops;
4487 #endif
4488 #ifdef CONFIG_FS_VERITY
4489         sb->s_vop = &f2fs_verityops;
4490 #endif
4491         sb->s_xattr = f2fs_xattr_handlers;
4492         sb->s_export_op = &f2fs_export_ops;
4493         sb->s_magic = F2FS_SUPER_MAGIC;
4494         sb->s_time_gran = 1;
4495         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4496                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4497         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4498         sb->s_iflags |= SB_I_CGROUPWB;
4499
4500         /* init f2fs-specific super block info */
4501         sbi->valid_super_block = valid_super_block;
4502
4503         /* disallow all the data/node/meta page writes */
4504         set_sbi_flag(sbi, SBI_POR_DOING);
4505
4506         err = f2fs_init_write_merge_io(sbi);
4507         if (err)
4508                 goto free_bio_info;
4509
4510         init_sb_info(sbi);
4511
4512         err = f2fs_init_iostat(sbi);
4513         if (err)
4514                 goto free_bio_info;
4515
4516         err = init_percpu_info(sbi);
4517         if (err)
4518                 goto free_iostat;
4519
4520         if (F2FS_IO_ALIGNED(sbi)) {
4521                 sbi->write_io_dummy =
4522                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4523                 if (!sbi->write_io_dummy) {
4524                         err = -ENOMEM;
4525                         goto free_percpu;
4526                 }
4527         }
4528
4529         /* init per sbi slab cache */
4530         err = f2fs_init_xattr_caches(sbi);
4531         if (err)
4532                 goto free_io_dummy;
4533         err = f2fs_init_page_array_cache(sbi);
4534         if (err)
4535                 goto free_xattr_cache;
4536
4537         /* get an inode for meta space */
4538         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4539         if (IS_ERR(sbi->meta_inode)) {
4540                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4541                 err = PTR_ERR(sbi->meta_inode);
4542                 goto free_page_array_cache;
4543         }
4544
4545         err = f2fs_get_valid_checkpoint(sbi);
4546         if (err) {
4547                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4548                 goto free_meta_inode;
4549         }
4550
4551         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4552                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4553         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4554                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4555                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4556         }
4557
4558         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4559                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4560
4561         /* Initialize device list */
4562         err = f2fs_scan_devices(sbi);
4563         if (err) {
4564                 f2fs_err(sbi, "Failed to find devices");
4565                 goto free_devices;
4566         }
4567
4568         err = f2fs_init_post_read_wq(sbi);
4569         if (err) {
4570                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4571                 goto free_devices;
4572         }
4573
4574         sbi->total_valid_node_count =
4575                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4576         percpu_counter_set(&sbi->total_valid_inode_count,
4577                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4578         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4579         sbi->total_valid_block_count =
4580                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4581         sbi->last_valid_block_count = sbi->total_valid_block_count;
4582         sbi->reserved_blocks = 0;
4583         sbi->current_reserved_blocks = 0;
4584         limit_reserve_root(sbi);
4585         adjust_unusable_cap_perc(sbi);
4586
4587         f2fs_init_extent_cache_info(sbi);
4588
4589         f2fs_init_ino_entry_info(sbi);
4590
4591         f2fs_init_fsync_node_info(sbi);
4592
4593         /* setup checkpoint request control and start checkpoint issue thread */
4594         f2fs_init_ckpt_req_control(sbi);
4595         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4596                         test_opt(sbi, MERGE_CHECKPOINT)) {
4597                 err = f2fs_start_ckpt_thread(sbi);
4598                 if (err) {
4599                         f2fs_err(sbi,
4600                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4601                             err);
4602                         goto stop_ckpt_thread;
4603                 }
4604         }
4605
4606         /* setup f2fs internal modules */
4607         err = f2fs_build_segment_manager(sbi);
4608         if (err) {
4609                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4610                          err);
4611                 goto free_sm;
4612         }
4613         err = f2fs_build_node_manager(sbi);
4614         if (err) {
4615                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4616                          err);
4617                 goto free_nm;
4618         }
4619
4620         err = adjust_reserved_segment(sbi);
4621         if (err)
4622                 goto free_nm;
4623
4624         /* For write statistics */
4625         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4626
4627         /* Read accumulated write IO statistics if exists */
4628         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4629         if (__exist_node_summaries(sbi))
4630                 sbi->kbytes_written =
4631                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4632
4633         f2fs_build_gc_manager(sbi);
4634
4635         err = f2fs_build_stats(sbi);
4636         if (err)
4637                 goto free_nm;
4638
4639         /* get an inode for node space */
4640         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4641         if (IS_ERR(sbi->node_inode)) {
4642                 f2fs_err(sbi, "Failed to read node inode");
4643                 err = PTR_ERR(sbi->node_inode);
4644                 goto free_stats;
4645         }
4646
4647         /* read root inode and dentry */
4648         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4649         if (IS_ERR(root)) {
4650                 f2fs_err(sbi, "Failed to read root inode");
4651                 err = PTR_ERR(root);
4652                 goto free_node_inode;
4653         }
4654         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4655                         !root->i_size || !root->i_nlink) {
4656                 iput(root);
4657                 err = -EINVAL;
4658                 goto free_node_inode;
4659         }
4660
4661         sb->s_root = d_make_root(root); /* allocate root dentry */
4662         if (!sb->s_root) {
4663                 err = -ENOMEM;
4664                 goto free_node_inode;
4665         }
4666
4667         err = f2fs_init_compress_inode(sbi);
4668         if (err)
4669                 goto free_root_inode;
4670
4671         err = f2fs_register_sysfs(sbi);
4672         if (err)
4673                 goto free_compress_inode;
4674
4675 #ifdef CONFIG_QUOTA
4676         /* Enable quota usage during mount */
4677         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4678                 err = f2fs_enable_quotas(sb);
4679                 if (err)
4680                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4681         }
4682
4683         quota_enabled = f2fs_recover_quota_begin(sbi);
4684 #endif
4685         /* if there are any orphan inodes, free them */
4686         err = f2fs_recover_orphan_inodes(sbi);
4687         if (err)
4688                 goto free_meta;
4689
4690         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4691                 goto reset_checkpoint;
4692
4693         /* recover fsynced data */
4694         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4695                         !test_opt(sbi, NORECOVERY)) {
4696                 /*
4697                  * mount should be failed, when device has readonly mode, and
4698                  * previous checkpoint was not done by clean system shutdown.
4699                  */
4700                 if (f2fs_hw_is_readonly(sbi)) {
4701                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4702                                 err = f2fs_recover_fsync_data(sbi, true);
4703                                 if (err > 0) {
4704                                         err = -EROFS;
4705                                         f2fs_err(sbi, "Need to recover fsync data, but "
4706                                                 "write access unavailable, please try "
4707                                                 "mount w/ disable_roll_forward or norecovery");
4708                                 }
4709                                 if (err < 0)
4710                                         goto free_meta;
4711                         }
4712                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4713                         goto reset_checkpoint;
4714                 }
4715
4716                 if (need_fsck)
4717                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4718
4719                 if (skip_recovery)
4720                         goto reset_checkpoint;
4721
4722                 err = f2fs_recover_fsync_data(sbi, false);
4723                 if (err < 0) {
4724                         if (err != -ENOMEM)
4725                                 skip_recovery = true;
4726                         need_fsck = true;
4727                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4728                                  err);
4729                         goto free_meta;
4730                 }
4731         } else {
4732                 err = f2fs_recover_fsync_data(sbi, true);
4733
4734                 if (!f2fs_readonly(sb) && err > 0) {
4735                         err = -EINVAL;
4736                         f2fs_err(sbi, "Need to recover fsync data");
4737                         goto free_meta;
4738                 }
4739         }
4740
4741 #ifdef CONFIG_QUOTA
4742         f2fs_recover_quota_end(sbi, quota_enabled);
4743 #endif
4744 reset_checkpoint:
4745         /*
4746          * If the f2fs is not readonly and fsync data recovery succeeds,
4747          * check zoned block devices' write pointer consistency.
4748          */
4749         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4750                 err = f2fs_check_write_pointer(sbi);
4751                 if (err)
4752                         goto free_meta;
4753         }
4754
4755         f2fs_init_inmem_curseg(sbi);
4756
4757         /* f2fs_recover_fsync_data() cleared this already */
4758         clear_sbi_flag(sbi, SBI_POR_DOING);
4759
4760         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4761                 err = f2fs_disable_checkpoint(sbi);
4762                 if (err)
4763                         goto sync_free_meta;
4764         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4765                 f2fs_enable_checkpoint(sbi);
4766         }
4767
4768         /*
4769          * If filesystem is not mounted as read-only then
4770          * do start the gc_thread.
4771          */
4772         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4773                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4774                 /* After POR, we can run background GC thread.*/
4775                 err = f2fs_start_gc_thread(sbi);
4776                 if (err)
4777                         goto sync_free_meta;
4778         }
4779         kvfree(options);
4780
4781         /* recover broken superblock */
4782         if (recovery) {
4783                 err = f2fs_commit_super(sbi, true);
4784                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4785                           sbi->valid_super_block ? 1 : 2, err);
4786         }
4787
4788         f2fs_join_shrinker(sbi);
4789
4790         f2fs_tuning_parameters(sbi);
4791
4792         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4793                     cur_cp_version(F2FS_CKPT(sbi)));
4794         f2fs_update_time(sbi, CP_TIME);
4795         f2fs_update_time(sbi, REQ_TIME);
4796         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4797         return 0;
4798
4799 sync_free_meta:
4800         /* safe to flush all the data */
4801         sync_filesystem(sbi->sb);
4802         retry_cnt = 0;
4803
4804 free_meta:
4805 #ifdef CONFIG_QUOTA
4806         f2fs_truncate_quota_inode_pages(sb);
4807         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4808                 f2fs_quota_off_umount(sbi->sb);
4809 #endif
4810         /*
4811          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4812          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4813          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4814          * falls into an infinite loop in f2fs_sync_meta_pages().
4815          */
4816         truncate_inode_pages_final(META_MAPPING(sbi));
4817         /* evict some inodes being cached by GC */
4818         evict_inodes(sb);
4819         f2fs_unregister_sysfs(sbi);
4820 free_compress_inode:
4821         f2fs_destroy_compress_inode(sbi);
4822 free_root_inode:
4823         dput(sb->s_root);
4824         sb->s_root = NULL;
4825 free_node_inode:
4826         f2fs_release_ino_entry(sbi, true);
4827         truncate_inode_pages_final(NODE_MAPPING(sbi));
4828         iput(sbi->node_inode);
4829         sbi->node_inode = NULL;
4830 free_stats:
4831         f2fs_destroy_stats(sbi);
4832 free_nm:
4833         /* stop discard thread before destroying node manager */
4834         f2fs_stop_discard_thread(sbi);
4835         f2fs_destroy_node_manager(sbi);
4836 free_sm:
4837         f2fs_destroy_segment_manager(sbi);
4838 stop_ckpt_thread:
4839         f2fs_stop_ckpt_thread(sbi);
4840         /* flush s_error_work before sbi destroy */
4841         flush_work(&sbi->s_error_work);
4842         f2fs_destroy_post_read_wq(sbi);
4843 free_devices:
4844         destroy_device_list(sbi);
4845         kvfree(sbi->ckpt);
4846 free_meta_inode:
4847         make_bad_inode(sbi->meta_inode);
4848         iput(sbi->meta_inode);
4849         sbi->meta_inode = NULL;
4850 free_page_array_cache:
4851         f2fs_destroy_page_array_cache(sbi);
4852 free_xattr_cache:
4853         f2fs_destroy_xattr_caches(sbi);
4854 free_io_dummy:
4855         mempool_destroy(sbi->write_io_dummy);
4856 free_percpu:
4857         destroy_percpu_info(sbi);
4858 free_iostat:
4859         f2fs_destroy_iostat(sbi);
4860 free_bio_info:
4861         for (i = 0; i < NR_PAGE_TYPE; i++)
4862                 kvfree(sbi->write_io[i]);
4863
4864 #if IS_ENABLED(CONFIG_UNICODE)
4865         utf8_unload(sb->s_encoding);
4866         sb->s_encoding = NULL;
4867 #endif
4868 free_options:
4869 #ifdef CONFIG_QUOTA
4870         for (i = 0; i < MAXQUOTAS; i++)
4871                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4872 #endif
4873         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4874         kvfree(options);
4875 free_sb_buf:
4876         kfree(raw_super);
4877 free_sbi:
4878         if (sbi->s_chksum_driver)
4879                 crypto_free_shash(sbi->s_chksum_driver);
4880         kfree(sbi);
4881
4882         /* give only one another chance */
4883         if (retry_cnt > 0 && skip_recovery) {
4884                 retry_cnt--;
4885                 shrink_dcache_sb(sb);
4886                 goto try_onemore;
4887         }
4888         return err;
4889 }
4890
4891 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4892                         const char *dev_name, void *data)
4893 {
4894         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4895 }
4896
4897 static void kill_f2fs_super(struct super_block *sb)
4898 {
4899         if (sb->s_root) {
4900                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4901
4902                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4903                 f2fs_stop_gc_thread(sbi);
4904                 f2fs_stop_discard_thread(sbi);
4905
4906 #ifdef CONFIG_F2FS_FS_COMPRESSION
4907                 /*
4908                  * latter evict_inode() can bypass checking and invalidating
4909                  * compress inode cache.
4910                  */
4911                 if (test_opt(sbi, COMPRESS_CACHE))
4912                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4913 #endif
4914
4915                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4916                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4917                         struct cp_control cpc = {
4918                                 .reason = CP_UMOUNT,
4919                         };
4920                         stat_inc_cp_call_count(sbi, TOTAL_CALL);
4921                         f2fs_write_checkpoint(sbi, &cpc);
4922                 }
4923
4924                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4925                         sb->s_flags &= ~SB_RDONLY;
4926         }
4927         kill_block_super(sb);
4928 }
4929
4930 static struct file_system_type f2fs_fs_type = {
4931         .owner          = THIS_MODULE,
4932         .name           = "f2fs",
4933         .mount          = f2fs_mount,
4934         .kill_sb        = kill_f2fs_super,
4935         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4936 };
4937 MODULE_ALIAS_FS("f2fs");
4938
4939 static int __init init_inodecache(void)
4940 {
4941         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4942                         sizeof(struct f2fs_inode_info), 0,
4943                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4944         return f2fs_inode_cachep ? 0 : -ENOMEM;
4945 }
4946
4947 static void destroy_inodecache(void)
4948 {
4949         /*
4950          * Make sure all delayed rcu free inodes are flushed before we
4951          * destroy cache.
4952          */
4953         rcu_barrier();
4954         kmem_cache_destroy(f2fs_inode_cachep);
4955 }
4956
4957 static int __init init_f2fs_fs(void)
4958 {
4959         int err;
4960
4961         if (PAGE_SIZE != F2FS_BLKSIZE) {
4962                 printk("F2FS not supported on PAGE_SIZE(%lu) != BLOCK_SIZE(%lu)\n",
4963                                 PAGE_SIZE, F2FS_BLKSIZE);
4964                 return -EINVAL;
4965         }
4966
4967         err = init_inodecache();
4968         if (err)
4969                 goto fail;
4970         err = f2fs_create_node_manager_caches();
4971         if (err)
4972                 goto free_inodecache;
4973         err = f2fs_create_segment_manager_caches();
4974         if (err)
4975                 goto free_node_manager_caches;
4976         err = f2fs_create_checkpoint_caches();
4977         if (err)
4978                 goto free_segment_manager_caches;
4979         err = f2fs_create_recovery_cache();
4980         if (err)
4981                 goto free_checkpoint_caches;
4982         err = f2fs_create_extent_cache();
4983         if (err)
4984                 goto free_recovery_cache;
4985         err = f2fs_create_garbage_collection_cache();
4986         if (err)
4987                 goto free_extent_cache;
4988         err = f2fs_init_sysfs();
4989         if (err)
4990                 goto free_garbage_collection_cache;
4991         err = f2fs_init_shrinker();
4992         if (err)
4993                 goto free_sysfs;
4994         err = register_filesystem(&f2fs_fs_type);
4995         if (err)
4996                 goto free_shrinker;
4997         f2fs_create_root_stats();
4998         err = f2fs_init_post_read_processing();
4999         if (err)
5000                 goto free_root_stats;
5001         err = f2fs_init_iostat_processing();
5002         if (err)
5003                 goto free_post_read;
5004         err = f2fs_init_bio_entry_cache();
5005         if (err)
5006                 goto free_iostat;
5007         err = f2fs_init_bioset();
5008         if (err)
5009                 goto free_bio_entry_cache;
5010         err = f2fs_init_compress_mempool();
5011         if (err)
5012                 goto free_bioset;
5013         err = f2fs_init_compress_cache();
5014         if (err)
5015                 goto free_compress_mempool;
5016         err = f2fs_create_casefold_cache();
5017         if (err)
5018                 goto free_compress_cache;
5019         return 0;
5020 free_compress_cache:
5021         f2fs_destroy_compress_cache();
5022 free_compress_mempool:
5023         f2fs_destroy_compress_mempool();
5024 free_bioset:
5025         f2fs_destroy_bioset();
5026 free_bio_entry_cache:
5027         f2fs_destroy_bio_entry_cache();
5028 free_iostat:
5029         f2fs_destroy_iostat_processing();
5030 free_post_read:
5031         f2fs_destroy_post_read_processing();
5032 free_root_stats:
5033         f2fs_destroy_root_stats();
5034         unregister_filesystem(&f2fs_fs_type);
5035 free_shrinker:
5036         f2fs_exit_shrinker();
5037 free_sysfs:
5038         f2fs_exit_sysfs();
5039 free_garbage_collection_cache:
5040         f2fs_destroy_garbage_collection_cache();
5041 free_extent_cache:
5042         f2fs_destroy_extent_cache();
5043 free_recovery_cache:
5044         f2fs_destroy_recovery_cache();
5045 free_checkpoint_caches:
5046         f2fs_destroy_checkpoint_caches();
5047 free_segment_manager_caches:
5048         f2fs_destroy_segment_manager_caches();
5049 free_node_manager_caches:
5050         f2fs_destroy_node_manager_caches();
5051 free_inodecache:
5052         destroy_inodecache();
5053 fail:
5054         return err;
5055 }
5056
5057 static void __exit exit_f2fs_fs(void)
5058 {
5059         f2fs_destroy_casefold_cache();
5060         f2fs_destroy_compress_cache();
5061         f2fs_destroy_compress_mempool();
5062         f2fs_destroy_bioset();
5063         f2fs_destroy_bio_entry_cache();
5064         f2fs_destroy_iostat_processing();
5065         f2fs_destroy_post_read_processing();
5066         f2fs_destroy_root_stats();
5067         unregister_filesystem(&f2fs_fs_type);
5068         f2fs_exit_shrinker();
5069         f2fs_exit_sysfs();
5070         f2fs_destroy_garbage_collection_cache();
5071         f2fs_destroy_extent_cache();
5072         f2fs_destroy_recovery_cache();
5073         f2fs_destroy_checkpoint_caches();
5074         f2fs_destroy_segment_manager_caches();
5075         f2fs_destroy_node_manager_caches();
5076         destroy_inodecache();
5077 }
5078
5079 module_init(init_f2fs_fs)
5080 module_exit(exit_f2fs_fs)
5081
5082 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
5083 MODULE_DESCRIPTION("Flash Friendly File System");
5084 MODULE_LICENSE("GPL");
5085 MODULE_SOFTDEP("pre: crc32");
5086