fs/f2fs/super.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/super.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/fs.h>
  11 #include <linux/fs_context.h>
  12 #include <linux/sched/mm.h>
  13 #include <linux/statfs.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/kthread.h>
  16 #include <linux/parser.h>
  17 #include <linux/mount.h>
  18 #include <linux/seq_file.h>
  19 #include <linux/proc_fs.h>
  20 #include <linux/random.h>
  21 #include <linux/exportfs.h>
  22 #include <linux/blkdev.h>
  23 #include <linux/quotaops.h>
  24 #include <linux/f2fs_fs.h>
  25 #include <linux/sysfs.h>
  26 #include <linux/quota.h>
  27 #include <linux/unicode.h>
  28 #include <linux/part_stat.h>
  29 #include <linux/zstd.h>
  30 #include <linux/lz4.h>
  31
  32 #include "f2fs.h"
  33 #include "node.h"
  34 #include "segment.h"
  35 #include "xattr.h"
  36 #include "gc.h"
  37 #include "iostat.h"
  38
  39 #define CREATE_TRACE_POINTS
  40 #include <trace/events/f2fs.h>
  41
  42 static struct kmem_cache *f2fs_inode_cachep;
  43
  44 #ifdef CONFIG_F2FS_FAULT_INJECTION
  45
  46 const char *f2fs_fault_name[FAULT_MAX] = {
  47         [FAULT_KMALLOC]         = "kmalloc",
  48         [FAULT_KVMALLOC]        = "kvmalloc",
  49         [FAULT_PAGE_ALLOC]      = "page alloc",
  50         [FAULT_PAGE_GET]        = "page get",
  51         [FAULT_ALLOC_NID]       = "alloc nid",
  52         [FAULT_ORPHAN]          = "orphan",
  53         [FAULT_BLOCK]           = "no more block",
  54         [FAULT_DIR_DEPTH]       = "too big dir depth",
  55         [FAULT_EVICT_INODE]     = "evict_inode fail",
  56         [FAULT_TRUNCATE]        = "truncate fail",
  57         [FAULT_READ_IO]         = "read IO error",
  58         [FAULT_CHECKPOINT]      = "checkpoint error",
  59         [FAULT_DISCARD]         = "discard error",
  60         [FAULT_WRITE_IO]        = "write IO error",
  61         [FAULT_SLAB_ALLOC]      = "slab alloc",
  62         [FAULT_DQUOT_INIT]      = "dquot initialize",
  63         [FAULT_LOCK_OP]         = "lock_op",
  64         [FAULT_BLKADDR]         = "invalid blkaddr",
  65 };
  66
  67 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  68                                                         unsigned int type)
  69 {
  70         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  71
  72         if (rate) {
  73                 atomic_set(&ffi->inject_ops, 0);
  74                 ffi->inject_rate = rate;
  75         }
  76
  77         if (type)
  78                 ffi->inject_type = type;
  79
  80         if (!rate && !type)
  81                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  82 }
  83 #endif
  84
  85 /* f2fs-wide shrinker description */
  86 static struct shrinker f2fs_shrinker_info = {
  87         .scan_objects = f2fs_shrink_scan,
  88         .count_objects = f2fs_shrink_count,
  89         .seeks = DEFAULT_SEEKS,
  90 };
  91
  92 enum {
  93         Opt_gc_background,
  94         Opt_disable_roll_forward,
  95         Opt_norecovery,
  96         Opt_discard,
  97         Opt_nodiscard,
  98         Opt_noheap,
  99         Opt_heap,
 100         Opt_user_xattr,
 101         Opt_nouser_xattr,
 102         Opt_acl,
 103         Opt_noacl,
 104         Opt_active_logs,
 105         Opt_disable_ext_identify,
 106         Opt_inline_xattr,
 107         Opt_noinline_xattr,
 108         Opt_inline_xattr_size,
 109         Opt_inline_data,
 110         Opt_inline_dentry,
 111         Opt_noinline_dentry,
 112         Opt_flush_merge,
 113         Opt_noflush_merge,
 114         Opt_barrier,
 115         Opt_nobarrier,
 116         Opt_fastboot,
 117         Opt_extent_cache,
 118         Opt_noextent_cache,
 119         Opt_noinline_data,
 120         Opt_data_flush,
 121         Opt_reserve_root,
 122         Opt_resgid,
 123         Opt_resuid,
 124         Opt_mode,
 125         Opt_io_size_bits,
 126         Opt_fault_injection,
 127         Opt_fault_type,
 128         Opt_lazytime,
 129         Opt_nolazytime,
 130         Opt_quota,
 131         Opt_noquota,
 132         Opt_usrquota,
 133         Opt_grpquota,
 134         Opt_prjquota,
 135         Opt_usrjquota,
 136         Opt_grpjquota,
 137         Opt_prjjquota,
 138         Opt_offusrjquota,
 139         Opt_offgrpjquota,
 140         Opt_offprjjquota,
 141         Opt_jqfmt_vfsold,
 142         Opt_jqfmt_vfsv0,
 143         Opt_jqfmt_vfsv1,
 144         Opt_alloc,
 145         Opt_fsync,
 146         Opt_test_dummy_encryption,
 147         Opt_inlinecrypt,
 148         Opt_checkpoint_disable,
 149         Opt_checkpoint_disable_cap,
 150         Opt_checkpoint_disable_cap_perc,
 151         Opt_checkpoint_enable,
 152         Opt_checkpoint_merge,
 153         Opt_nocheckpoint_merge,
 154         Opt_compress_algorithm,
 155         Opt_compress_log_size,
 156         Opt_compress_extension,
 157         Opt_nocompress_extension,
 158         Opt_compress_chksum,
 159         Opt_compress_mode,
 160         Opt_compress_cache,
 161         Opt_atgc,
 162         Opt_gc_merge,
 163         Opt_nogc_merge,
 164         Opt_discard_unit,
 165         Opt_memory_mode,
 166         Opt_age_extent_cache,
 167         Opt_errors,
 168         Opt_err,
 169 };
 170
 171 static match_table_t f2fs_tokens = {
 172         {Opt_gc_background, "background_gc=%s"},
 173         {Opt_disable_roll_forward, "disable_roll_forward"},
 174         {Opt_norecovery, "norecovery"},
 175         {Opt_discard, "discard"},
 176         {Opt_nodiscard, "nodiscard"},
 177         {Opt_noheap, "no_heap"},
 178         {Opt_heap, "heap"},
 179         {Opt_user_xattr, "user_xattr"},
 180         {Opt_nouser_xattr, "nouser_xattr"},
 181         {Opt_acl, "acl"},
 182         {Opt_noacl, "noacl"},
 183         {Opt_active_logs, "active_logs=%u"},
 184         {Opt_disable_ext_identify, "disable_ext_identify"},
 185         {Opt_inline_xattr, "inline_xattr"},
 186         {Opt_noinline_xattr, "noinline_xattr"},
 187         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 188         {Opt_inline_data, "inline_data"},
 189         {Opt_inline_dentry, "inline_dentry"},
 190         {Opt_noinline_dentry, "noinline_dentry"},
 191         {Opt_flush_merge, "flush_merge"},
 192         {Opt_noflush_merge, "noflush_merge"},
 193         {Opt_barrier, "barrier"},
 194         {Opt_nobarrier, "nobarrier"},
 195         {Opt_fastboot, "fastboot"},
 196         {Opt_extent_cache, "extent_cache"},
 197         {Opt_noextent_cache, "noextent_cache"},
 198         {Opt_noinline_data, "noinline_data"},
 199         {Opt_data_flush, "data_flush"},
 200         {Opt_reserve_root, "reserve_root=%u"},
 201         {Opt_resgid, "resgid=%u"},
 202         {Opt_resuid, "resuid=%u"},
 203         {Opt_mode, "mode=%s"},
 204         {Opt_io_size_bits, "io_bits=%u"},
 205         {Opt_fault_injection, "fault_injection=%u"},
 206         {Opt_fault_type, "fault_type=%u"},
 207         {Opt_lazytime, "lazytime"},
 208         {Opt_nolazytime, "nolazytime"},
 209         {Opt_quota, "quota"},
 210         {Opt_noquota, "noquota"},
 211         {Opt_usrquota, "usrquota"},
 212         {Opt_grpquota, "grpquota"},
 213         {Opt_prjquota, "prjquota"},
 214         {Opt_usrjquota, "usrjquota=%s"},
 215         {Opt_grpjquota, "grpjquota=%s"},
 216         {Opt_prjjquota, "prjjquota=%s"},
 217         {Opt_offusrjquota, "usrjquota="},
 218         {Opt_offgrpjquota, "grpjquota="},
 219         {Opt_offprjjquota, "prjjquota="},
 220         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 221         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 222         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 223         {Opt_alloc, "alloc_mode=%s"},
 224         {Opt_fsync, "fsync_mode=%s"},
 225         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 226         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 227         {Opt_inlinecrypt, "inlinecrypt"},
 228         {Opt_checkpoint_disable, "checkpoint=disable"},
 229         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 230         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 231         {Opt_checkpoint_enable, "checkpoint=enable"},
 232         {Opt_checkpoint_merge, "checkpoint_merge"},
 233         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 234         {Opt_compress_algorithm, "compress_algorithm=%s"},
 235         {Opt_compress_log_size, "compress_log_size=%u"},
 236         {Opt_compress_extension, "compress_extension=%s"},
 237         {Opt_nocompress_extension, "nocompress_extension=%s"},
 238         {Opt_compress_chksum, "compress_chksum"},
 239         {Opt_compress_mode, "compress_mode=%s"},
 240         {Opt_compress_cache, "compress_cache"},
 241         {Opt_atgc, "atgc"},
 242         {Opt_gc_merge, "gc_merge"},
 243         {Opt_nogc_merge, "nogc_merge"},
 244         {Opt_discard_unit, "discard_unit=%s"},
 245         {Opt_memory_mode, "memory=%s"},
 246         {Opt_age_extent_cache, "age_extent_cache"},
 247         {Opt_errors, "errors=%s"},
 248         {Opt_err, NULL},
 249 };
 250
 251 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 252 {
 253         struct va_format vaf;
 254         va_list args;
 255         int level;
 256
 257         va_start(args, fmt);
 258
 259         level = printk_get_level(fmt);
 260         vaf.fmt = printk_skip_level(fmt);
 261         vaf.va = &args;
 262         printk("%c%cF2FS-fs (%s): %pV\n",
 263                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 264
 265         va_end(args);
 266 }
 267
 268 #if IS_ENABLED(CONFIG_UNICODE)
 269 static const struct f2fs_sb_encodings {
 270         __u16 magic;
 271         char *name;
 272         unsigned int version;
 273 } f2fs_sb_encoding_map[] = {
 274         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 275 };
 276
 277 static const struct f2fs_sb_encodings *
 278 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 279 {
 280         __u16 magic = le16_to_cpu(sb->s_encoding);
 281         int i;
 282
 283         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 284                 if (magic == f2fs_sb_encoding_map[i].magic)
 285                         return &f2fs_sb_encoding_map[i];
 286
 287         return NULL;
 288 }
 289
 290 struct kmem_cache *f2fs_cf_name_slab;
 291 static int __init f2fs_create_casefold_cache(void)
 292 {
 293         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 294                                                         F2FS_NAME_LEN);
 295         return f2fs_cf_name_slab ? 0 : -ENOMEM;
 296 }
 297
 298 static void f2fs_destroy_casefold_cache(void)
 299 {
 300         kmem_cache_destroy(f2fs_cf_name_slab);
 301 }
 302 #else
 303 static int __init f2fs_create_casefold_cache(void) { return 0; }
 304 static void f2fs_destroy_casefold_cache(void) { }
 305 #endif
 306
 307 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 308 {
 309         block_t limit = min((sbi->user_block_count >> 3),
 310                         sbi->user_block_count - sbi->reserved_blocks);
 311
 312         /* limit is 12.5% */
 313         if (test_opt(sbi, RESERVE_ROOT) &&
 314                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 315                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 316                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 317                           F2FS_OPTION(sbi).root_reserved_blocks);
 318         }
 319         if (!test_opt(sbi, RESERVE_ROOT) &&
 320                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 321                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 322                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 323                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 324                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 325                           from_kuid_munged(&init_user_ns,
 326                                            F2FS_OPTION(sbi).s_resuid),
 327                           from_kgid_munged(&init_user_ns,
 328                                            F2FS_OPTION(sbi).s_resgid));
 329 }
 330
 331 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 332 {
 333         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 334         unsigned int avg_vblocks;
 335         unsigned int wanted_reserved_segments;
 336         block_t avail_user_block_count;
 337
 338         if (!F2FS_IO_ALIGNED(sbi))
 339                 return 0;
 340
 341         /* average valid block count in section in worst case */
 342         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 343
 344         /*
 345          * we need enough free space when migrating one section in worst case
 346          */
 347         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 348                                                 reserved_segments(sbi);
 349         wanted_reserved_segments -= reserved_segments(sbi);
 350
 351         avail_user_block_count = sbi->user_block_count -
 352                                 sbi->current_reserved_blocks -
 353                                 F2FS_OPTION(sbi).root_reserved_blocks;
 354
 355         if (wanted_reserved_segments * sbi->blocks_per_seg >
 356                                         avail_user_block_count) {
 357                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 358                         wanted_reserved_segments,
 359                         avail_user_block_count >> sbi->log_blocks_per_seg);
 360                 return -ENOSPC;
 361         }
 362
 363         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 364
 365         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 366                          wanted_reserved_segments);
 367
 368         return 0;
 369 }
 370
 371 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 372 {
 373         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 374                 return;
 375
 376         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 377                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 378         else
 379                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 380                                         F2FS_OPTION(sbi).unusable_cap_perc;
 381
 382         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 383                         F2FS_OPTION(sbi).unusable_cap,
 384                         F2FS_OPTION(sbi).unusable_cap_perc);
 385 }
 386
 387 static void init_once(void *foo)
 388 {
 389         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 390
 391         inode_init_once(&fi->vfs_inode);
 392 }
 393
 394 #ifdef CONFIG_QUOTA
 395 static const char * const quotatypes[] = INITQFNAMES;
 396 #define QTYPE2NAME(t) (quotatypes[t])
 397 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 398                                                         substring_t *args)
 399 {
 400         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 401         char *qname;
 402         int ret = -EINVAL;
 403
 404         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 405                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 406                 return -EINVAL;
 407         }
 408         if (f2fs_sb_has_quota_ino(sbi)) {
 409                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 410                 return 0;
 411         }
 412
 413         qname = match_strdup(args);
 414         if (!qname) {
 415                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 416                 return -ENOMEM;
 417         }
 418         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 419                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 420                         ret = 0;
 421                 else
 422                         f2fs_err(sbi, "%s quota file already specified",
 423                                  QTYPE2NAME(qtype));
 424                 goto errout;
 425         }
 426         if (strchr(qname, '/')) {
 427                 f2fs_err(sbi, "quotafile must be on filesystem root");
 428                 goto errout;
 429         }
 430         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 431         set_opt(sbi, QUOTA);
 432         return 0;
 433 errout:
 434         kfree(qname);
 435         return ret;
 436 }
 437
 438 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 439 {
 440         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 441
 442         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 443                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 444                 return -EINVAL;
 445         }
 446         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 447         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 448         return 0;
 449 }
 450
 451 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 452 {
 453         /*
 454          * We do the test below only for project quotas. 'usrquota' and
 455          * 'grpquota' mount options are allowed even without quota feature
 456          * to support legacy quotas in quota files.
 457          */
 458         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 459                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 460                 return -1;
 461         }
 462         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 463                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 464                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 465                 if (test_opt(sbi, USRQUOTA) &&
 466                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 467                         clear_opt(sbi, USRQUOTA);
 468
 469                 if (test_opt(sbi, GRPQUOTA) &&
 470                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 471                         clear_opt(sbi, GRPQUOTA);
 472
 473                 if (test_opt(sbi, PRJQUOTA) &&
 474                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 475                         clear_opt(sbi, PRJQUOTA);
 476
 477                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 478                                 test_opt(sbi, PRJQUOTA)) {
 479                         f2fs_err(sbi, "old and new quota format mixing");
 480                         return -1;
 481                 }
 482
 483                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 484                         f2fs_err(sbi, "journaled quota format not specified");
 485                         return -1;
 486                 }
 487         }
 488
 489         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 490                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 491                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 492         }
 493         return 0;
 494 }
 495 #endif
 496
 497 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 498                                           const char *opt,
 499                                           const substring_t *arg,
 500                                           bool is_remount)
 501 {
 502         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 503         struct fs_parameter param = {
 504                 .type = fs_value_is_string,
 505                 .string = arg->from ? arg->from : "",
 506         };
 507         struct fscrypt_dummy_policy *policy =
 508                 &F2FS_OPTION(sbi).dummy_enc_policy;
 509         int err;
 510
 511         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 512                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 513                 return -EINVAL;
 514         }
 515
 516         if (!f2fs_sb_has_encrypt(sbi)) {
 517                 f2fs_err(sbi, "Encrypt feature is off");
 518                 return -EINVAL;
 519         }
 520
 521         /*
 522          * This mount option is just for testing, and it's not worthwhile to
 523          * implement the extra complexity (e.g. RCU protection) that would be
 524          * needed to allow it to be set or changed during remount.  We do allow
 525          * it to be specified during remount, but only if there is no change.
 526          */
 527         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 528                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 529                 return -EINVAL;
 530         }
 531
 532         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 533         if (err) {
 534                 if (err == -EEXIST)
 535                         f2fs_warn(sbi,
 536                                   "Can't change test_dummy_encryption on remount");
 537                 else if (err == -EINVAL)
 538                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 539                                   opt);
 540                 else
 541                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 542                                   opt, err);
 543                 return -EINVAL;
 544         }
 545         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 546         return 0;
 547 }
 548
 549 #ifdef CONFIG_F2FS_FS_COMPRESSION
 550 static bool is_compress_extension_exist(struct f2fs_sb_info *sbi,
 551                                         const char *new_ext, bool is_ext)
 552 {
 553         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 554         int ext_cnt;
 555         int i;
 556
 557         if (is_ext) {
 558                 ext = F2FS_OPTION(sbi).extensions;
 559                 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 560         } else {
 561                 ext = F2FS_OPTION(sbi).noextensions;
 562                 ext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 563         }
 564
 565         for (i = 0; i < ext_cnt; i++) {
 566                 if (!strcasecmp(new_ext, ext[i]))
 567                         return true;
 568         }
 569
 570         return false;
 571 }
 572
 573 /*
 574  * 1. The same extension name cannot not appear in both compress and non-compress extension
 575  * at the same time.
 576  * 2. If the compress extension specifies all files, the types specified by the non-compress
 577  * extension will be treated as special cases and will not be compressed.
 578  * 3. Don't allow the non-compress extension specifies all files.
 579  */
 580 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 581 {
 582         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 583         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 584         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 585
 586         ext = F2FS_OPTION(sbi).extensions;
 587         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 588         noext = F2FS_OPTION(sbi).noextensions;
 589         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 590
 591         if (!noext_cnt)
 592                 return 0;
 593
 594         for (no_index = 0; no_index < noext_cnt; no_index++) {
 595                 if (!strcasecmp("*", noext[no_index])) {
 596                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 597                         return -EINVAL;
 598                 }
 599                 for (index = 0; index < ext_cnt; index++) {
 600                         if (!strcasecmp(ext[index], noext[no_index])) {
 601                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 602                                                 ext[index]);
 603                                 return -EINVAL;
 604                         }
 605                 }
 606         }
 607         return 0;
 608 }
 609
 610 #ifdef CONFIG_F2FS_FS_LZ4
 611 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 612 {
 613 #ifdef CONFIG_F2FS_FS_LZ4HC
 614         unsigned int level;
 615
 616         if (strlen(str) == 3) {
 617                 F2FS_OPTION(sbi).compress_level = 0;
 618                 return 0;
 619         }
 620
 621         str += 3;
 622
 623         if (str[0] != ':') {
 624                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 625                 return -EINVAL;
 626         }
 627         if (kstrtouint(str + 1, 10, &level))
 628                 return -EINVAL;
 629
 630         if (!f2fs_is_compress_level_valid(COMPRESS_LZ4, level)) {
 631                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 632                 return -EINVAL;
 633         }
 634
 635         F2FS_OPTION(sbi).compress_level = level;
 636         return 0;
 637 #else
 638         if (strlen(str) == 3) {
 639                 F2FS_OPTION(sbi).compress_level = 0;
 640                 return 0;
 641         }
 642         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 643         return -EINVAL;
 644 #endif
 645 }
 646 #endif
 647
 648 #ifdef CONFIG_F2FS_FS_ZSTD
 649 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 650 {
 651         unsigned int level;
 652         int len = 4;
 653
 654         if (strlen(str) == len) {
 655                 F2FS_OPTION(sbi).compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
 656                 return 0;
 657         }
 658
 659         str += len;
 660
 661         if (str[0] != ':') {
 662                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 663                 return -EINVAL;
 664         }
 665         if (kstrtouint(str + 1, 10, &level))
 666                 return -EINVAL;
 667
 668         if (!f2fs_is_compress_level_valid(COMPRESS_ZSTD, level)) {
 669                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 670                 return -EINVAL;
 671         }
 672
 673         F2FS_OPTION(sbi).compress_level = level;
 674         return 0;
 675 }
 676 #endif
 677 #endif
 678
 679 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 680 {
 681         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 682         substring_t args[MAX_OPT_ARGS];
 683 #ifdef CONFIG_F2FS_FS_COMPRESSION
 684         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 685         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 686         int ext_cnt, noext_cnt;
 687 #endif
 688         char *p, *name;
 689         int arg = 0;
 690         kuid_t uid;
 691         kgid_t gid;
 692         int ret;
 693
 694         if (!options)
 695                 goto default_check;
 696
 697         while ((p = strsep(&options, ",")) != NULL) {
 698                 int token;
 699
 700                 if (!*p)
 701                         continue;
 702                 /*
 703                  * Initialize args struct so we know whether arg was
 704                  * found; some options take optional arguments.
 705                  */
 706                 args[0].to = args[0].from = NULL;
 707                 token = match_token(p, f2fs_tokens, args);
 708
 709                 switch (token) {
 710                 case Opt_gc_background:
 711                         name = match_strdup(&args[0]);
 712
 713                         if (!name)
 714                                 return -ENOMEM;
 715                         if (!strcmp(name, "on")) {
 716                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 717                         } else if (!strcmp(name, "off")) {
 718                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 719                         } else if (!strcmp(name, "sync")) {
 720                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 721                         } else {
 722                                 kfree(name);
 723                                 return -EINVAL;
 724                         }
 725                         kfree(name);
 726                         break;
 727                 case Opt_disable_roll_forward:
 728                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 729                         break;
 730                 case Opt_norecovery:
 731                         /* this option mounts f2fs with ro */
 732                         set_opt(sbi, NORECOVERY);
 733                         if (!f2fs_readonly(sb))
 734                                 return -EINVAL;
 735                         break;
 736                 case Opt_discard:
 737                         if (!f2fs_hw_support_discard(sbi)) {
 738                                 f2fs_warn(sbi, "device does not support discard");
 739                                 break;
 740                         }
 741                         set_opt(sbi, DISCARD);
 742                         break;
 743                 case Opt_nodiscard:
 744                         if (f2fs_hw_should_discard(sbi)) {
 745                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 746                                 return -EINVAL;
 747                         }
 748                         clear_opt(sbi, DISCARD);
 749                         break;
 750                 case Opt_noheap:
 751                         set_opt(sbi, NOHEAP);
 752                         break;
 753                 case Opt_heap:
 754                         clear_opt(sbi, NOHEAP);
 755                         break;
 756 #ifdef CONFIG_F2FS_FS_XATTR
 757                 case Opt_user_xattr:
 758                         set_opt(sbi, XATTR_USER);
 759                         break;
 760                 case Opt_nouser_xattr:
 761                         clear_opt(sbi, XATTR_USER);
 762                         break;
 763                 case Opt_inline_xattr:
 764                         set_opt(sbi, INLINE_XATTR);
 765                         break;
 766                 case Opt_noinline_xattr:
 767                         clear_opt(sbi, INLINE_XATTR);
 768                         break;
 769                 case Opt_inline_xattr_size:
 770                         if (args->from && match_int(args, &arg))
 771                                 return -EINVAL;
 772                         set_opt(sbi, INLINE_XATTR_SIZE);
 773                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 774                         break;
 775 #else
 776                 case Opt_user_xattr:
 777                         f2fs_info(sbi, "user_xattr options not supported");
 778                         break;
 779                 case Opt_nouser_xattr:
 780                         f2fs_info(sbi, "nouser_xattr options not supported");
 781                         break;
 782                 case Opt_inline_xattr:
 783                         f2fs_info(sbi, "inline_xattr options not supported");
 784                         break;
 785                 case Opt_noinline_xattr:
 786                         f2fs_info(sbi, "noinline_xattr options not supported");
 787                         break;
 788 #endif
 789 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 790                 case Opt_acl:
 791                         set_opt(sbi, POSIX_ACL);
 792                         break;
 793                 case Opt_noacl:
 794                         clear_opt(sbi, POSIX_ACL);
 795                         break;
 796 #else
 797                 case Opt_acl:
 798                         f2fs_info(sbi, "acl options not supported");
 799                         break;
 800                 case Opt_noacl:
 801                         f2fs_info(sbi, "noacl options not supported");
 802                         break;
 803 #endif
 804                 case Opt_active_logs:
 805                         if (args->from && match_int(args, &arg))
 806                                 return -EINVAL;
 807                         if (arg != 2 && arg != 4 &&
 808                                 arg != NR_CURSEG_PERSIST_TYPE)
 809                                 return -EINVAL;
 810                         F2FS_OPTION(sbi).active_logs = arg;
 811                         break;
 812                 case Opt_disable_ext_identify:
 813                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 814                         break;
 815                 case Opt_inline_data:
 816                         set_opt(sbi, INLINE_DATA);
 817                         break;
 818                 case Opt_inline_dentry:
 819                         set_opt(sbi, INLINE_DENTRY);
 820                         break;
 821                 case Opt_noinline_dentry:
 822                         clear_opt(sbi, INLINE_DENTRY);
 823                         break;
 824                 case Opt_flush_merge:
 825                         set_opt(sbi, FLUSH_MERGE);
 826                         break;
 827                 case Opt_noflush_merge:
 828                         clear_opt(sbi, FLUSH_MERGE);
 829                         break;
 830                 case Opt_nobarrier:
 831                         set_opt(sbi, NOBARRIER);
 832                         break;
 833                 case Opt_barrier:
 834                         clear_opt(sbi, NOBARRIER);
 835                         break;
 836                 case Opt_fastboot:
 837                         set_opt(sbi, FASTBOOT);
 838                         break;
 839                 case Opt_extent_cache:
 840                         set_opt(sbi, READ_EXTENT_CACHE);
 841                         break;
 842                 case Opt_noextent_cache:
 843                         clear_opt(sbi, READ_EXTENT_CACHE);
 844                         break;
 845                 case Opt_noinline_data:
 846                         clear_opt(sbi, INLINE_DATA);
 847                         break;
 848                 case Opt_data_flush:
 849                         set_opt(sbi, DATA_FLUSH);
 850                         break;
 851                 case Opt_reserve_root:
 852                         if (args->from && match_int(args, &arg))
 853                                 return -EINVAL;
 854                         if (test_opt(sbi, RESERVE_ROOT)) {
 855                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 856                                           F2FS_OPTION(sbi).root_reserved_blocks);
 857                         } else {
 858                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 859                                 set_opt(sbi, RESERVE_ROOT);
 860                         }
 861                         break;
 862                 case Opt_resuid:
 863                         if (args->from && match_int(args, &arg))
 864                                 return -EINVAL;
 865                         uid = make_kuid(current_user_ns(), arg);
 866                         if (!uid_valid(uid)) {
 867                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 868                                 return -EINVAL;
 869                         }
 870                         F2FS_OPTION(sbi).s_resuid = uid;
 871                         break;
 872                 case Opt_resgid:
 873                         if (args->from && match_int(args, &arg))
 874                                 return -EINVAL;
 875                         gid = make_kgid(current_user_ns(), arg);
 876                         if (!gid_valid(gid)) {
 877                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 878                                 return -EINVAL;
 879                         }
 880                         F2FS_OPTION(sbi).s_resgid = gid;
 881                         break;
 882                 case Opt_mode:
 883                         name = match_strdup(&args[0]);
 884
 885                         if (!name)
 886                                 return -ENOMEM;
 887                         if (!strcmp(name, "adaptive")) {
 888                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 889                         } else if (!strcmp(name, "lfs")) {
 890                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 891                         } else if (!strcmp(name, "fragment:segment")) {
 892                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 893                         } else if (!strcmp(name, "fragment:block")) {
 894                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 895                         } else {
 896                                 kfree(name);
 897                                 return -EINVAL;
 898                         }
 899                         kfree(name);
 900                         break;
 901                 case Opt_io_size_bits:
 902                         if (args->from && match_int(args, &arg))
 903                                 return -EINVAL;
 904                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 905                                 f2fs_warn(sbi, "Not support %ld, larger than %d",
 906                                         BIT(arg), BIO_MAX_VECS);
 907                                 return -EINVAL;
 908                         }
 909                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 910                         break;
 911 #ifdef CONFIG_F2FS_FAULT_INJECTION
 912                 case Opt_fault_injection:
 913                         if (args->from && match_int(args, &arg))
 914                                 return -EINVAL;
 915                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 916                         set_opt(sbi, FAULT_INJECTION);
 917                         break;
 918
 919                 case Opt_fault_type:
 920                         if (args->from && match_int(args, &arg))
 921                                 return -EINVAL;
 922                         f2fs_build_fault_attr(sbi, 0, arg);
 923                         set_opt(sbi, FAULT_INJECTION);
 924                         break;
 925 #else
 926                 case Opt_fault_injection:
 927                         f2fs_info(sbi, "fault_injection options not supported");
 928                         break;
 929
 930                 case Opt_fault_type:
 931                         f2fs_info(sbi, "fault_type options not supported");
 932                         break;
 933 #endif
 934                 case Opt_lazytime:
 935                         sb->s_flags |= SB_LAZYTIME;
 936                         break;
 937                 case Opt_nolazytime:
 938                         sb->s_flags &= ~SB_LAZYTIME;
 939                         break;
 940 #ifdef CONFIG_QUOTA
 941                 case Opt_quota:
 942                 case Opt_usrquota:
 943                         set_opt(sbi, USRQUOTA);
 944                         break;
 945                 case Opt_grpquota:
 946                         set_opt(sbi, GRPQUOTA);
 947                         break;
 948                 case Opt_prjquota:
 949                         set_opt(sbi, PRJQUOTA);
 950                         break;
 951                 case Opt_usrjquota:
 952                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 953                         if (ret)
 954                                 return ret;
 955                         break;
 956                 case Opt_grpjquota:
 957                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 958                         if (ret)
 959                                 return ret;
 960                         break;
 961                 case Opt_prjjquota:
 962                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 963                         if (ret)
 964                                 return ret;
 965                         break;
 966                 case Opt_offusrjquota:
 967                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 968                         if (ret)
 969                                 return ret;
 970                         break;
 971                 case Opt_offgrpjquota:
 972                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 973                         if (ret)
 974                                 return ret;
 975                         break;
 976                 case Opt_offprjjquota:
 977                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 978                         if (ret)
 979                                 return ret;
 980                         break;
 981                 case Opt_jqfmt_vfsold:
 982                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 983                         break;
 984                 case Opt_jqfmt_vfsv0:
 985                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 986                         break;
 987                 case Opt_jqfmt_vfsv1:
 988                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 989                         break;
 990                 case Opt_noquota:
 991                         clear_opt(sbi, QUOTA);
 992                         clear_opt(sbi, USRQUOTA);
 993                         clear_opt(sbi, GRPQUOTA);
 994                         clear_opt(sbi, PRJQUOTA);
 995                         break;
 996 #else
 997                 case Opt_quota:
 998                 case Opt_usrquota:
 999                 case Opt_grpquota:
1000                 case Opt_prjquota:
1001                 case Opt_usrjquota:
1002                 case Opt_grpjquota:
1003                 case Opt_prjjquota:
1004                 case Opt_offusrjquota:
1005                 case Opt_offgrpjquota:
1006                 case Opt_offprjjquota:
1007                 case Opt_jqfmt_vfsold:
1008                 case Opt_jqfmt_vfsv0:
1009                 case Opt_jqfmt_vfsv1:
1010                 case Opt_noquota:
1011                         f2fs_info(sbi, "quota operations not supported");
1012                         break;
1013 #endif
1014                 case Opt_alloc:
1015                         name = match_strdup(&args[0]);
1016                         if (!name)
1017                                 return -ENOMEM;
1018
1019                         if (!strcmp(name, "default")) {
1020                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1021                         } else if (!strcmp(name, "reuse")) {
1022                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1023                         } else {
1024                                 kfree(name);
1025                                 return -EINVAL;
1026                         }
1027                         kfree(name);
1028                         break;
1029                 case Opt_fsync:
1030                         name = match_strdup(&args[0]);
1031                         if (!name)
1032                                 return -ENOMEM;
1033                         if (!strcmp(name, "posix")) {
1034                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1035                         } else if (!strcmp(name, "strict")) {
1036                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1037                         } else if (!strcmp(name, "nobarrier")) {
1038                                 F2FS_OPTION(sbi).fsync_mode =
1039                                                         FSYNC_MODE_NOBARRIER;
1040                         } else {
1041                                 kfree(name);
1042                                 return -EINVAL;
1043                         }
1044                         kfree(name);
1045                         break;
1046                 case Opt_test_dummy_encryption:
1047                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1048                                                              is_remount);
1049                         if (ret)
1050                                 return ret;
1051                         break;
1052                 case Opt_inlinecrypt:
1053 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1054                         sb->s_flags |= SB_INLINECRYPT;
1055 #else
1056                         f2fs_info(sbi, "inline encryption not supported");
1057 #endif
1058                         break;
1059                 case Opt_checkpoint_disable_cap_perc:
1060                         if (args->from && match_int(args, &arg))
1061                                 return -EINVAL;
1062                         if (arg < 0 || arg > 100)
1063                                 return -EINVAL;
1064                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1065                         set_opt(sbi, DISABLE_CHECKPOINT);
1066                         break;
1067                 case Opt_checkpoint_disable_cap:
1068                         if (args->from && match_int(args, &arg))
1069                                 return -EINVAL;
1070                         F2FS_OPTION(sbi).unusable_cap = arg;
1071                         set_opt(sbi, DISABLE_CHECKPOINT);
1072                         break;
1073                 case Opt_checkpoint_disable:
1074                         set_opt(sbi, DISABLE_CHECKPOINT);
1075                         break;
1076                 case Opt_checkpoint_enable:
1077                         clear_opt(sbi, DISABLE_CHECKPOINT);
1078                         break;
1079                 case Opt_checkpoint_merge:
1080                         set_opt(sbi, MERGE_CHECKPOINT);
1081                         break;
1082                 case Opt_nocheckpoint_merge:
1083                         clear_opt(sbi, MERGE_CHECKPOINT);
1084                         break;
1085 #ifdef CONFIG_F2FS_FS_COMPRESSION
1086                 case Opt_compress_algorithm:
1087                         if (!f2fs_sb_has_compression(sbi)) {
1088                                 f2fs_info(sbi, "Image doesn't support compression");
1089                                 break;
1090                         }
1091                         name = match_strdup(&args[0]);
1092                         if (!name)
1093                                 return -ENOMEM;
1094                         if (!strcmp(name, "lzo")) {
1095 #ifdef CONFIG_F2FS_FS_LZO
1096                                 F2FS_OPTION(sbi).compress_level = 0;
1097                                 F2FS_OPTION(sbi).compress_algorithm =
1098                                                                 COMPRESS_LZO;
1099 #else
1100                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1101 #endif
1102                         } else if (!strncmp(name, "lz4", 3)) {
1103 #ifdef CONFIG_F2FS_FS_LZ4
1104                                 ret = f2fs_set_lz4hc_level(sbi, name);
1105                                 if (ret) {
1106                                         kfree(name);
1107                                         return -EINVAL;
1108                                 }
1109                                 F2FS_OPTION(sbi).compress_algorithm =
1110                                                                 COMPRESS_LZ4;
1111 #else
1112                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1113 #endif
1114                         } else if (!strncmp(name, "zstd", 4)) {
1115 #ifdef CONFIG_F2FS_FS_ZSTD
1116                                 ret = f2fs_set_zstd_level(sbi, name);
1117                                 if (ret) {
1118                                         kfree(name);
1119                                         return -EINVAL;
1120                                 }
1121                                 F2FS_OPTION(sbi).compress_algorithm =
1122                                                                 COMPRESS_ZSTD;
1123 #else
1124                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1125 #endif
1126                         } else if (!strcmp(name, "lzo-rle")) {
1127 #ifdef CONFIG_F2FS_FS_LZORLE
1128                                 F2FS_OPTION(sbi).compress_level = 0;
1129                                 F2FS_OPTION(sbi).compress_algorithm =
1130                                                                 COMPRESS_LZORLE;
1131 #else
1132                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1133 #endif
1134                         } else {
1135                                 kfree(name);
1136                                 return -EINVAL;
1137                         }
1138                         kfree(name);
1139                         break;
1140                 case Opt_compress_log_size:
1141                         if (!f2fs_sb_has_compression(sbi)) {
1142                                 f2fs_info(sbi, "Image doesn't support compression");
1143                                 break;
1144                         }
1145                         if (args->from && match_int(args, &arg))
1146                                 return -EINVAL;
1147                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1148                                 arg > MAX_COMPRESS_LOG_SIZE) {
1149                                 f2fs_err(sbi,
1150                                         "Compress cluster log size is out of range");
1151                                 return -EINVAL;
1152                         }
1153                         F2FS_OPTION(sbi).compress_log_size = arg;
1154                         break;
1155                 case Opt_compress_extension:
1156                         if (!f2fs_sb_has_compression(sbi)) {
1157                                 f2fs_info(sbi, "Image doesn't support compression");
1158                                 break;
1159                         }
1160                         name = match_strdup(&args[0]);
1161                         if (!name)
1162                                 return -ENOMEM;
1163
1164                         ext = F2FS_OPTION(sbi).extensions;
1165                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1166
1167                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1168                                 ext_cnt >= COMPRESS_EXT_NUM) {
1169                                 f2fs_err(sbi,
1170                                         "invalid extension length/number");
1171                                 kfree(name);
1172                                 return -EINVAL;
1173                         }
1174
1175                         if (is_compress_extension_exist(sbi, name, true)) {
1176                                 kfree(name);
1177                                 break;
1178                         }
1179
1180                         strcpy(ext[ext_cnt], name);
1181                         F2FS_OPTION(sbi).compress_ext_cnt++;
1182                         kfree(name);
1183                         break;
1184                 case Opt_nocompress_extension:
1185                         if (!f2fs_sb_has_compression(sbi)) {
1186                                 f2fs_info(sbi, "Image doesn't support compression");
1187                                 break;
1188                         }
1189                         name = match_strdup(&args[0]);
1190                         if (!name)
1191                                 return -ENOMEM;
1192
1193                         noext = F2FS_OPTION(sbi).noextensions;
1194                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1195
1196                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1197                                 noext_cnt >= COMPRESS_EXT_NUM) {
1198                                 f2fs_err(sbi,
1199                                         "invalid extension length/number");
1200                                 kfree(name);
1201                                 return -EINVAL;
1202                         }
1203
1204                         if (is_compress_extension_exist(sbi, name, false)) {
1205                                 kfree(name);
1206                                 break;
1207                         }
1208
1209                         strcpy(noext[noext_cnt], name);
1210                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1211                         kfree(name);
1212                         break;
1213                 case Opt_compress_chksum:
1214                         if (!f2fs_sb_has_compression(sbi)) {
1215                                 f2fs_info(sbi, "Image doesn't support compression");
1216                                 break;
1217                         }
1218                         F2FS_OPTION(sbi).compress_chksum = true;
1219                         break;
1220                 case Opt_compress_mode:
1221                         if (!f2fs_sb_has_compression(sbi)) {
1222                                 f2fs_info(sbi, "Image doesn't support compression");
1223                                 break;
1224                         }
1225                         name = match_strdup(&args[0]);
1226                         if (!name)
1227                                 return -ENOMEM;
1228                         if (!strcmp(name, "fs")) {
1229                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1230                         } else if (!strcmp(name, "user")) {
1231                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1232                         } else {
1233                                 kfree(name);
1234                                 return -EINVAL;
1235                         }
1236                         kfree(name);
1237                         break;
1238                 case Opt_compress_cache:
1239                         if (!f2fs_sb_has_compression(sbi)) {
1240                                 f2fs_info(sbi, "Image doesn't support compression");
1241                                 break;
1242                         }
1243                         set_opt(sbi, COMPRESS_CACHE);
1244                         break;
1245 #else
1246                 case Opt_compress_algorithm:
1247                 case Opt_compress_log_size:
1248                 case Opt_compress_extension:
1249                 case Opt_nocompress_extension:
1250                 case Opt_compress_chksum:
1251                 case Opt_compress_mode:
1252                 case Opt_compress_cache:
1253                         f2fs_info(sbi, "compression options not supported");
1254                         break;
1255 #endif
1256                 case Opt_atgc:
1257                         set_opt(sbi, ATGC);
1258                         break;
1259                 case Opt_gc_merge:
1260                         set_opt(sbi, GC_MERGE);
1261                         break;
1262                 case Opt_nogc_merge:
1263                         clear_opt(sbi, GC_MERGE);
1264                         break;
1265                 case Opt_discard_unit:
1266                         name = match_strdup(&args[0]);
1267                         if (!name)
1268                                 return -ENOMEM;
1269                         if (!strcmp(name, "block")) {
1270                                 F2FS_OPTION(sbi).discard_unit =
1271                                                 DISCARD_UNIT_BLOCK;
1272                         } else if (!strcmp(name, "segment")) {
1273                                 F2FS_OPTION(sbi).discard_unit =
1274                                                 DISCARD_UNIT_SEGMENT;
1275                         } else if (!strcmp(name, "section")) {
1276                                 F2FS_OPTION(sbi).discard_unit =
1277                                                 DISCARD_UNIT_SECTION;
1278                         } else {
1279                                 kfree(name);
1280                                 return -EINVAL;
1281                         }
1282                         kfree(name);
1283                         break;
1284                 case Opt_memory_mode:
1285                         name = match_strdup(&args[0]);
1286                         if (!name)
1287                                 return -ENOMEM;
1288                         if (!strcmp(name, "normal")) {
1289                                 F2FS_OPTION(sbi).memory_mode =
1290                                                 MEMORY_MODE_NORMAL;
1291                         } else if (!strcmp(name, "low")) {
1292                                 F2FS_OPTION(sbi).memory_mode =
1293                                                 MEMORY_MODE_LOW;
1294                         } else {
1295                                 kfree(name);
1296                                 return -EINVAL;
1297                         }
1298                         kfree(name);
1299                         break;
1300                 case Opt_age_extent_cache:
1301                         set_opt(sbi, AGE_EXTENT_CACHE);
1302                         break;
1303                 case Opt_errors:
1304                         name = match_strdup(&args[0]);
1305                         if (!name)
1306                                 return -ENOMEM;
1307                         if (!strcmp(name, "remount-ro")) {
1308                                 F2FS_OPTION(sbi).errors =
1309                                                 MOUNT_ERRORS_READONLY;
1310                         } else if (!strcmp(name, "continue")) {
1311                                 F2FS_OPTION(sbi).errors =
1312                                                 MOUNT_ERRORS_CONTINUE;
1313                         } else if (!strcmp(name, "panic")) {
1314                                 F2FS_OPTION(sbi).errors =
1315                                                 MOUNT_ERRORS_PANIC;
1316                         } else {
1317                                 kfree(name);
1318                                 return -EINVAL;
1319                         }
1320                         kfree(name);
1321                         break;
1322                 default:
1323                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1324                                  p);
1325                         return -EINVAL;
1326                 }
1327         }
1328 default_check:
1329 #ifdef CONFIG_QUOTA
1330         if (f2fs_check_quota_options(sbi))
1331                 return -EINVAL;
1332 #else
1333         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1334                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1335                 return -EINVAL;
1336         }
1337         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1338                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1339                 return -EINVAL;
1340         }
1341 #endif
1342 #if !IS_ENABLED(CONFIG_UNICODE)
1343         if (f2fs_sb_has_casefold(sbi)) {
1344                 f2fs_err(sbi,
1345                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1346                 return -EINVAL;
1347         }
1348 #endif
1349         /*
1350          * The BLKZONED feature indicates that the drive was formatted with
1351          * zone alignment optimization. This is optional for host-aware
1352          * devices, but mandatory for host-managed zoned block devices.
1353          */
1354         if (f2fs_sb_has_blkzoned(sbi)) {
1355 #ifdef CONFIG_BLK_DEV_ZONED
1356                 if (F2FS_OPTION(sbi).discard_unit !=
1357                                                 DISCARD_UNIT_SECTION) {
1358                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1359                         F2FS_OPTION(sbi).discard_unit =
1360                                         DISCARD_UNIT_SECTION;
1361                 }
1362
1363                 if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) {
1364                         f2fs_info(sbi, "Only lfs mode is allowed with zoned block device feature");
1365                         return -EINVAL;
1366                 }
1367 #else
1368                 f2fs_err(sbi, "Zoned block device support is not enabled");
1369                 return -EINVAL;
1370 #endif
1371         }
1372
1373 #ifdef CONFIG_F2FS_FS_COMPRESSION
1374         if (f2fs_test_compress_extension(sbi)) {
1375                 f2fs_err(sbi, "invalid compress or nocompress extension");
1376                 return -EINVAL;
1377         }
1378 #endif
1379
1380         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1381                 f2fs_err(sbi, "Should set mode=lfs with %luKB-sized IO",
1382                          F2FS_IO_SIZE_KB(sbi));
1383                 return -EINVAL;
1384         }
1385
1386         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1387                 int min_size, max_size;
1388
1389                 if (!f2fs_sb_has_extra_attr(sbi) ||
1390                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1391                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1392                         return -EINVAL;
1393                 }
1394                 if (!test_opt(sbi, INLINE_XATTR)) {
1395                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1396                         return -EINVAL;
1397                 }
1398
1399                 min_size = MIN_INLINE_XATTR_SIZE;
1400                 max_size = MAX_INLINE_XATTR_SIZE;
1401
1402                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1403                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1404                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1405                                  min_size, max_size);
1406                         return -EINVAL;
1407                 }
1408         }
1409
1410         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1411                 f2fs_err(sbi, "LFS is not compatible with checkpoint=disable");
1412                 return -EINVAL;
1413         }
1414
1415         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1416                 f2fs_err(sbi, "LFS is not compatible with ATGC");
1417                 return -EINVAL;
1418         }
1419
1420         if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1421                 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1422                 return -EINVAL;
1423         }
1424
1425         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1426                 f2fs_err(sbi, "Allow to mount readonly mode only");
1427                 return -EROFS;
1428         }
1429         return 0;
1430 }
1431
1432 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1433 {
1434         struct f2fs_inode_info *fi;
1435
1436         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC))
1437                 return NULL;
1438
1439         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1440         if (!fi)
1441                 return NULL;
1442
1443         init_once((void *) fi);
1444
1445         /* Initialize f2fs-specific inode info */
1446         atomic_set(&fi->dirty_pages, 0);
1447         atomic_set(&fi->i_compr_blocks, 0);
1448         init_f2fs_rwsem(&fi->i_sem);
1449         spin_lock_init(&fi->i_size_lock);
1450         INIT_LIST_HEAD(&fi->dirty_list);
1451         INIT_LIST_HEAD(&fi->gdirty_list);
1452         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1453         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1454         init_f2fs_rwsem(&fi->i_xattr_sem);
1455
1456         /* Will be used by directory only */
1457         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1458
1459         return &fi->vfs_inode;
1460 }
1461
1462 static int f2fs_drop_inode(struct inode *inode)
1463 {
1464         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1465         int ret;
1466
1467         /*
1468          * during filesystem shutdown, if checkpoint is disabled,
1469          * drop useless meta/node dirty pages.
1470          */
1471         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1472                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1473                         inode->i_ino == F2FS_META_INO(sbi)) {
1474                         trace_f2fs_drop_inode(inode, 1);
1475                         return 1;
1476                 }
1477         }
1478
1479         /*
1480          * This is to avoid a deadlock condition like below.
1481          * writeback_single_inode(inode)
1482          *  - f2fs_write_data_page
1483          *    - f2fs_gc -> iput -> evict
1484          *       - inode_wait_for_writeback(inode)
1485          */
1486         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1487                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1488                         /* to avoid evict_inode call simultaneously */
1489                         atomic_inc(&inode->i_count);
1490                         spin_unlock(&inode->i_lock);
1491
1492                         /* should remain fi->extent_tree for writepage */
1493                         f2fs_destroy_extent_node(inode);
1494
1495                         sb_start_intwrite(inode->i_sb);
1496                         f2fs_i_size_write(inode, 0);
1497
1498                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1499                                         inode, NULL, 0, DATA);
1500                         truncate_inode_pages_final(inode->i_mapping);
1501
1502                         if (F2FS_HAS_BLOCKS(inode))
1503                                 f2fs_truncate(inode);
1504
1505                         sb_end_intwrite(inode->i_sb);
1506
1507                         spin_lock(&inode->i_lock);
1508                         atomic_dec(&inode->i_count);
1509                 }
1510                 trace_f2fs_drop_inode(inode, 0);
1511                 return 0;
1512         }
1513         ret = generic_drop_inode(inode);
1514         if (!ret)
1515                 ret = fscrypt_drop_inode(inode);
1516         trace_f2fs_drop_inode(inode, ret);
1517         return ret;
1518 }
1519
1520 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1521 {
1522         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1523         int ret = 0;
1524
1525         spin_lock(&sbi->inode_lock[DIRTY_META]);
1526         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1527                 ret = 1;
1528         } else {
1529                 set_inode_flag(inode, FI_DIRTY_INODE);
1530                 stat_inc_dirty_inode(sbi, DIRTY_META);
1531         }
1532         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1533                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1534                                 &sbi->inode_list[DIRTY_META]);
1535                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1536         }
1537         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1538         return ret;
1539 }
1540
1541 void f2fs_inode_synced(struct inode *inode)
1542 {
1543         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1544
1545         spin_lock(&sbi->inode_lock[DIRTY_META]);
1546         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1547                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1548                 return;
1549         }
1550         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1551                 list_del_init(&F2FS_I(inode)->gdirty_list);
1552                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1553         }
1554         clear_inode_flag(inode, FI_DIRTY_INODE);
1555         clear_inode_flag(inode, FI_AUTO_RECOVER);
1556         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1557         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1558 }
1559
1560 /*
1561  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1562  *
1563  * We should call set_dirty_inode to write the dirty inode through write_inode.
1564  */
1565 static void f2fs_dirty_inode(struct inode *inode, int flags)
1566 {
1567         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1568
1569         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1570                         inode->i_ino == F2FS_META_INO(sbi))
1571                 return;
1572
1573         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1574                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1575
1576         f2fs_inode_dirtied(inode, false);
1577 }
1578
1579 static void f2fs_free_inode(struct inode *inode)
1580 {
1581         fscrypt_free_inode(inode);
1582         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1583 }
1584
1585 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1586 {
1587         percpu_counter_destroy(&sbi->total_valid_inode_count);
1588         percpu_counter_destroy(&sbi->rf_node_block_count);
1589         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1590 }
1591
1592 static void destroy_device_list(struct f2fs_sb_info *sbi)
1593 {
1594         int i;
1595
1596         for (i = 0; i < sbi->s_ndevs; i++) {
1597                 if (i > 0)
1598                         blkdev_put(FDEV(i).bdev, sbi->sb);
1599 #ifdef CONFIG_BLK_DEV_ZONED
1600                 kvfree(FDEV(i).blkz_seq);
1601 #endif
1602         }
1603         kvfree(sbi->devs);
1604 }
1605
1606 static void f2fs_put_super(struct super_block *sb)
1607 {
1608         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1609         int i;
1610         int err = 0;
1611         bool done;
1612
1613         /* unregister procfs/sysfs entries in advance to avoid race case */
1614         f2fs_unregister_sysfs(sbi);
1615
1616         f2fs_quota_off_umount(sb);
1617
1618         /* prevent remaining shrinker jobs */
1619         mutex_lock(&sbi->umount_mutex);
1620
1621         /*
1622          * flush all issued checkpoints and stop checkpoint issue thread.
1623          * after then, all checkpoints should be done by each process context.
1624          */
1625         f2fs_stop_ckpt_thread(sbi);
1626
1627         /*
1628          * We don't need to do checkpoint when superblock is clean.
1629          * But, the previous checkpoint was not done by umount, it needs to do
1630          * clean checkpoint again.
1631          */
1632         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1633                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1634                 struct cp_control cpc = {
1635                         .reason = CP_UMOUNT,
1636                 };
1637                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1638                 err = f2fs_write_checkpoint(sbi, &cpc);
1639         }
1640
1641         /* be sure to wait for any on-going discard commands */
1642         done = f2fs_issue_discard_timeout(sbi);
1643         if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && done) {
1644                 struct cp_control cpc = {
1645                         .reason = CP_UMOUNT | CP_TRIMMED,
1646                 };
1647                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1648                 err = f2fs_write_checkpoint(sbi, &cpc);
1649         }
1650
1651         /*
1652          * normally superblock is clean, so we need to release this.
1653          * In addition, EIO will skip do checkpoint, we need this as well.
1654          */
1655         f2fs_release_ino_entry(sbi, true);
1656
1657         f2fs_leave_shrinker(sbi);
1658         mutex_unlock(&sbi->umount_mutex);
1659
1660         /* our cp_error case, we can wait for any writeback page */
1661         f2fs_flush_merged_writes(sbi);
1662
1663         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1664
1665         if (err || f2fs_cp_error(sbi)) {
1666                 truncate_inode_pages_final(NODE_MAPPING(sbi));
1667                 truncate_inode_pages_final(META_MAPPING(sbi));
1668         }
1669
1670         for (i = 0; i < NR_COUNT_TYPE; i++) {
1671                 if (!get_pages(sbi, i))
1672                         continue;
1673                 f2fs_err(sbi, "detect filesystem reference count leak during "
1674                         "umount, type: %d, count: %lld", i, get_pages(sbi, i));
1675                 f2fs_bug_on(sbi, 1);
1676         }
1677
1678         f2fs_bug_on(sbi, sbi->fsync_node_num);
1679
1680         f2fs_destroy_compress_inode(sbi);
1681
1682         iput(sbi->node_inode);
1683         sbi->node_inode = NULL;
1684
1685         iput(sbi->meta_inode);
1686         sbi->meta_inode = NULL;
1687
1688         /*
1689          * iput() can update stat information, if f2fs_write_checkpoint()
1690          * above failed with error.
1691          */
1692         f2fs_destroy_stats(sbi);
1693
1694         /* destroy f2fs internal modules */
1695         f2fs_destroy_node_manager(sbi);
1696         f2fs_destroy_segment_manager(sbi);
1697
1698         /* flush s_error_work before sbi destroy */
1699         flush_work(&sbi->s_error_work);
1700
1701         f2fs_destroy_post_read_wq(sbi);
1702
1703         kvfree(sbi->ckpt);
1704
1705         sb->s_fs_info = NULL;
1706         if (sbi->s_chksum_driver)
1707                 crypto_free_shash(sbi->s_chksum_driver);
1708         kfree(sbi->raw_super);
1709
1710         destroy_device_list(sbi);
1711         f2fs_destroy_page_array_cache(sbi);
1712         f2fs_destroy_xattr_caches(sbi);
1713         mempool_destroy(sbi->write_io_dummy);
1714 #ifdef CONFIG_QUOTA
1715         for (i = 0; i < MAXQUOTAS; i++)
1716                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1717 #endif
1718         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1719         destroy_percpu_info(sbi);
1720         f2fs_destroy_iostat(sbi);
1721         for (i = 0; i < NR_PAGE_TYPE; i++)
1722                 kvfree(sbi->write_io[i]);
1723 #if IS_ENABLED(CONFIG_UNICODE)
1724         utf8_unload(sb->s_encoding);
1725 #endif
1726         kfree(sbi);
1727 }
1728
1729 int f2fs_sync_fs(struct super_block *sb, int sync)
1730 {
1731         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1732         int err = 0;
1733
1734         if (unlikely(f2fs_cp_error(sbi)))
1735                 return 0;
1736         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1737                 return 0;
1738
1739         trace_f2fs_sync_fs(sb, sync);
1740
1741         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1742                 return -EAGAIN;
1743
1744         if (sync) {
1745                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1746                 err = f2fs_issue_checkpoint(sbi);
1747         }
1748
1749         return err;
1750 }
1751
1752 static int f2fs_freeze(struct super_block *sb)
1753 {
1754         if (f2fs_readonly(sb))
1755                 return 0;
1756
1757         /* IO error happened before */
1758         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1759                 return -EIO;
1760
1761         /* must be clean, since sync_filesystem() was already called */
1762         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1763                 return -EINVAL;
1764
1765         /* Let's flush checkpoints and stop the thread. */
1766         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1767
1768         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1769         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1770         return 0;
1771 }
1772
1773 static int f2fs_unfreeze(struct super_block *sb)
1774 {
1775         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1776         return 0;
1777 }
1778
1779 #ifdef CONFIG_QUOTA
1780 static int f2fs_statfs_project(struct super_block *sb,
1781                                 kprojid_t projid, struct kstatfs *buf)
1782 {
1783         struct kqid qid;
1784         struct dquot *dquot;
1785         u64 limit;
1786         u64 curblock;
1787
1788         qid = make_kqid_projid(projid);
1789         dquot = dqget(sb, qid);
1790         if (IS_ERR(dquot))
1791                 return PTR_ERR(dquot);
1792         spin_lock(&dquot->dq_dqb_lock);
1793
1794         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1795                                         dquot->dq_dqb.dqb_bhardlimit);
1796         if (limit)
1797                 limit >>= sb->s_blocksize_bits;
1798
1799         if (limit && buf->f_blocks > limit) {
1800                 curblock = (dquot->dq_dqb.dqb_curspace +
1801                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1802                 buf->f_blocks = limit;
1803                 buf->f_bfree = buf->f_bavail =
1804                         (buf->f_blocks > curblock) ?
1805                          (buf->f_blocks - curblock) : 0;
1806         }
1807
1808         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1809                                         dquot->dq_dqb.dqb_ihardlimit);
1810
1811         if (limit && buf->f_files > limit) {
1812                 buf->f_files = limit;
1813                 buf->f_ffree =
1814                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1815                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1816         }
1817
1818         spin_unlock(&dquot->dq_dqb_lock);
1819         dqput(dquot);
1820         return 0;
1821 }
1822 #endif
1823
1824 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1825 {
1826         struct super_block *sb = dentry->d_sb;
1827         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1828         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1829         block_t total_count, user_block_count, start_count;
1830         u64 avail_node_count;
1831         unsigned int total_valid_node_count;
1832
1833         total_count = le64_to_cpu(sbi->raw_super->block_count);
1834         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1835         buf->f_type = F2FS_SUPER_MAGIC;
1836         buf->f_bsize = sbi->blocksize;
1837
1838         buf->f_blocks = total_count - start_count;
1839
1840         spin_lock(&sbi->stat_lock);
1841
1842         user_block_count = sbi->user_block_count;
1843         total_valid_node_count = valid_node_count(sbi);
1844         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1845         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1846                                                 sbi->current_reserved_blocks;
1847
1848         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1849                 buf->f_bfree = 0;
1850         else
1851                 buf->f_bfree -= sbi->unusable_block_count;
1852         spin_unlock(&sbi->stat_lock);
1853
1854         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1855                 buf->f_bavail = buf->f_bfree -
1856                                 F2FS_OPTION(sbi).root_reserved_blocks;
1857         else
1858                 buf->f_bavail = 0;
1859
1860         if (avail_node_count > user_block_count) {
1861                 buf->f_files = user_block_count;
1862                 buf->f_ffree = buf->f_bavail;
1863         } else {
1864                 buf->f_files = avail_node_count;
1865                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1866                                         buf->f_bavail);
1867         }
1868
1869         buf->f_namelen = F2FS_NAME_LEN;
1870         buf->f_fsid    = u64_to_fsid(id);
1871
1872 #ifdef CONFIG_QUOTA
1873         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1874                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1875                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1876         }
1877 #endif
1878         return 0;
1879 }
1880
1881 static inline void f2fs_show_quota_options(struct seq_file *seq,
1882                                            struct super_block *sb)
1883 {
1884 #ifdef CONFIG_QUOTA
1885         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1886
1887         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1888                 char *fmtname = "";
1889
1890                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1891                 case QFMT_VFS_OLD:
1892                         fmtname = "vfsold";
1893                         break;
1894                 case QFMT_VFS_V0:
1895                         fmtname = "vfsv0";
1896                         break;
1897                 case QFMT_VFS_V1:
1898                         fmtname = "vfsv1";
1899                         break;
1900                 }
1901                 seq_printf(seq, ",jqfmt=%s", fmtname);
1902         }
1903
1904         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1905                 seq_show_option(seq, "usrjquota",
1906                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1907
1908         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1909                 seq_show_option(seq, "grpjquota",
1910                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1911
1912         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1913                 seq_show_option(seq, "prjjquota",
1914                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1915 #endif
1916 }
1917
1918 #ifdef CONFIG_F2FS_FS_COMPRESSION
1919 static inline void f2fs_show_compress_options(struct seq_file *seq,
1920                                                         struct super_block *sb)
1921 {
1922         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1923         char *algtype = "";
1924         int i;
1925
1926         if (!f2fs_sb_has_compression(sbi))
1927                 return;
1928
1929         switch (F2FS_OPTION(sbi).compress_algorithm) {
1930         case COMPRESS_LZO:
1931                 algtype = "lzo";
1932                 break;
1933         case COMPRESS_LZ4:
1934                 algtype = "lz4";
1935                 break;
1936         case COMPRESS_ZSTD:
1937                 algtype = "zstd";
1938                 break;
1939         case COMPRESS_LZORLE:
1940                 algtype = "lzo-rle";
1941                 break;
1942         }
1943         seq_printf(seq, ",compress_algorithm=%s", algtype);
1944
1945         if (F2FS_OPTION(sbi).compress_level)
1946                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1947
1948         seq_printf(seq, ",compress_log_size=%u",
1949                         F2FS_OPTION(sbi).compress_log_size);
1950
1951         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1952                 seq_printf(seq, ",compress_extension=%s",
1953                         F2FS_OPTION(sbi).extensions[i]);
1954         }
1955
1956         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1957                 seq_printf(seq, ",nocompress_extension=%s",
1958                         F2FS_OPTION(sbi).noextensions[i]);
1959         }
1960
1961         if (F2FS_OPTION(sbi).compress_chksum)
1962                 seq_puts(seq, ",compress_chksum");
1963
1964         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1965                 seq_printf(seq, ",compress_mode=%s", "fs");
1966         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1967                 seq_printf(seq, ",compress_mode=%s", "user");
1968
1969         if (test_opt(sbi, COMPRESS_CACHE))
1970                 seq_puts(seq, ",compress_cache");
1971 }
1972 #endif
1973
1974 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1975 {
1976         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1977
1978         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1979                 seq_printf(seq, ",background_gc=%s", "sync");
1980         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1981                 seq_printf(seq, ",background_gc=%s", "on");
1982         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1983                 seq_printf(seq, ",background_gc=%s", "off");
1984
1985         if (test_opt(sbi, GC_MERGE))
1986                 seq_puts(seq, ",gc_merge");
1987         else
1988                 seq_puts(seq, ",nogc_merge");
1989
1990         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1991                 seq_puts(seq, ",disable_roll_forward");
1992         if (test_opt(sbi, NORECOVERY))
1993                 seq_puts(seq, ",norecovery");
1994         if (test_opt(sbi, DISCARD)) {
1995                 seq_puts(seq, ",discard");
1996                 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
1997                         seq_printf(seq, ",discard_unit=%s", "block");
1998                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
1999                         seq_printf(seq, ",discard_unit=%s", "segment");
2000                 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2001                         seq_printf(seq, ",discard_unit=%s", "section");
2002         } else {
2003                 seq_puts(seq, ",nodiscard");
2004         }
2005         if (test_opt(sbi, NOHEAP))
2006                 seq_puts(seq, ",no_heap");
2007         else
2008                 seq_puts(seq, ",heap");
2009 #ifdef CONFIG_F2FS_FS_XATTR
2010         if (test_opt(sbi, XATTR_USER))
2011                 seq_puts(seq, ",user_xattr");
2012         else
2013                 seq_puts(seq, ",nouser_xattr");
2014         if (test_opt(sbi, INLINE_XATTR))
2015                 seq_puts(seq, ",inline_xattr");
2016         else
2017                 seq_puts(seq, ",noinline_xattr");
2018         if (test_opt(sbi, INLINE_XATTR_SIZE))
2019                 seq_printf(seq, ",inline_xattr_size=%u",
2020                                         F2FS_OPTION(sbi).inline_xattr_size);
2021 #endif
2022 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2023         if (test_opt(sbi, POSIX_ACL))
2024                 seq_puts(seq, ",acl");
2025         else
2026                 seq_puts(seq, ",noacl");
2027 #endif
2028         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
2029                 seq_puts(seq, ",disable_ext_identify");
2030         if (test_opt(sbi, INLINE_DATA))
2031                 seq_puts(seq, ",inline_data");
2032         else
2033                 seq_puts(seq, ",noinline_data");
2034         if (test_opt(sbi, INLINE_DENTRY))
2035                 seq_puts(seq, ",inline_dentry");
2036         else
2037                 seq_puts(seq, ",noinline_dentry");
2038         if (test_opt(sbi, FLUSH_MERGE))
2039                 seq_puts(seq, ",flush_merge");
2040         else
2041                 seq_puts(seq, ",noflush_merge");
2042         if (test_opt(sbi, NOBARRIER))
2043                 seq_puts(seq, ",nobarrier");
2044         else
2045                 seq_puts(seq, ",barrier");
2046         if (test_opt(sbi, FASTBOOT))
2047                 seq_puts(seq, ",fastboot");
2048         if (test_opt(sbi, READ_EXTENT_CACHE))
2049                 seq_puts(seq, ",extent_cache");
2050         else
2051                 seq_puts(seq, ",noextent_cache");
2052         if (test_opt(sbi, AGE_EXTENT_CACHE))
2053                 seq_puts(seq, ",age_extent_cache");
2054         if (test_opt(sbi, DATA_FLUSH))
2055                 seq_puts(seq, ",data_flush");
2056
2057         seq_puts(seq, ",mode=");
2058         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
2059                 seq_puts(seq, "adaptive");
2060         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
2061                 seq_puts(seq, "lfs");
2062         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
2063                 seq_puts(seq, "fragment:segment");
2064         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2065                 seq_puts(seq, "fragment:block");
2066         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
2067         if (test_opt(sbi, RESERVE_ROOT))
2068                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
2069                                 F2FS_OPTION(sbi).root_reserved_blocks,
2070                                 from_kuid_munged(&init_user_ns,
2071                                         F2FS_OPTION(sbi).s_resuid),
2072                                 from_kgid_munged(&init_user_ns,
2073                                         F2FS_OPTION(sbi).s_resgid));
2074         if (F2FS_IO_SIZE_BITS(sbi))
2075                 seq_printf(seq, ",io_bits=%u",
2076                                 F2FS_OPTION(sbi).write_io_size_bits);
2077 #ifdef CONFIG_F2FS_FAULT_INJECTION
2078         if (test_opt(sbi, FAULT_INJECTION)) {
2079                 seq_printf(seq, ",fault_injection=%u",
2080                                 F2FS_OPTION(sbi).fault_info.inject_rate);
2081                 seq_printf(seq, ",fault_type=%u",
2082                                 F2FS_OPTION(sbi).fault_info.inject_type);
2083         }
2084 #endif
2085 #ifdef CONFIG_QUOTA
2086         if (test_opt(sbi, QUOTA))
2087                 seq_puts(seq, ",quota");
2088         if (test_opt(sbi, USRQUOTA))
2089                 seq_puts(seq, ",usrquota");
2090         if (test_opt(sbi, GRPQUOTA))
2091                 seq_puts(seq, ",grpquota");
2092         if (test_opt(sbi, PRJQUOTA))
2093                 seq_puts(seq, ",prjquota");
2094 #endif
2095         f2fs_show_quota_options(seq, sbi->sb);
2096
2097         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2098
2099         if (sbi->sb->s_flags & SB_INLINECRYPT)
2100                 seq_puts(seq, ",inlinecrypt");
2101
2102         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2103                 seq_printf(seq, ",alloc_mode=%s", "default");
2104         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2105                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2106
2107         if (test_opt(sbi, DISABLE_CHECKPOINT))
2108                 seq_printf(seq, ",checkpoint=disable:%u",
2109                                 F2FS_OPTION(sbi).unusable_cap);
2110         if (test_opt(sbi, MERGE_CHECKPOINT))
2111                 seq_puts(seq, ",checkpoint_merge");
2112         else
2113                 seq_puts(seq, ",nocheckpoint_merge");
2114         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2115                 seq_printf(seq, ",fsync_mode=%s", "posix");
2116         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2117                 seq_printf(seq, ",fsync_mode=%s", "strict");
2118         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2119                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2120
2121 #ifdef CONFIG_F2FS_FS_COMPRESSION
2122         f2fs_show_compress_options(seq, sbi->sb);
2123 #endif
2124
2125         if (test_opt(sbi, ATGC))
2126                 seq_puts(seq, ",atgc");
2127
2128         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2129                 seq_printf(seq, ",memory=%s", "normal");
2130         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2131                 seq_printf(seq, ",memory=%s", "low");
2132
2133         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
2134                 seq_printf(seq, ",errors=%s", "remount-ro");
2135         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
2136                 seq_printf(seq, ",errors=%s", "continue");
2137         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
2138                 seq_printf(seq, ",errors=%s", "panic");
2139
2140         return 0;
2141 }
2142
2143 static void default_options(struct f2fs_sb_info *sbi, bool remount)
2144 {
2145         /* init some FS parameters */
2146         if (!remount) {
2147                 set_opt(sbi, READ_EXTENT_CACHE);
2148                 clear_opt(sbi, DISABLE_CHECKPOINT);
2149
2150                 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2151                         set_opt(sbi, DISCARD);
2152
2153                 if (f2fs_sb_has_blkzoned(sbi))
2154                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2155                 else
2156                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2157         }
2158
2159         if (f2fs_sb_has_readonly(sbi))
2160                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2161         else
2162                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2163
2164         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2165         if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2166                                                         SMALL_VOLUME_SEGMENTS)
2167                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2168         else
2169                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2170         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2171         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2172         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2173         if (f2fs_sb_has_compression(sbi)) {
2174                 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2175                 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2176                 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2177                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2178         }
2179         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2180         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2181         F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
2182
2183         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2184
2185         set_opt(sbi, INLINE_XATTR);
2186         set_opt(sbi, INLINE_DATA);
2187         set_opt(sbi, INLINE_DENTRY);
2188         set_opt(sbi, NOHEAP);
2189         set_opt(sbi, MERGE_CHECKPOINT);
2190         F2FS_OPTION(sbi).unusable_cap = 0;
2191         sbi->sb->s_flags |= SB_LAZYTIME;
2192         if (!f2fs_is_readonly(sbi))
2193                 set_opt(sbi, FLUSH_MERGE);
2194         if (f2fs_sb_has_blkzoned(sbi))
2195                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2196         else
2197                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2198
2199 #ifdef CONFIG_F2FS_FS_XATTR
2200         set_opt(sbi, XATTR_USER);
2201 #endif
2202 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2203         set_opt(sbi, POSIX_ACL);
2204 #endif
2205
2206         f2fs_build_fault_attr(sbi, 0, 0);
2207 }
2208
2209 #ifdef CONFIG_QUOTA
2210 static int f2fs_enable_quotas(struct super_block *sb);
2211 #endif
2212
2213 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2214 {
2215         unsigned int s_flags = sbi->sb->s_flags;
2216         struct cp_control cpc;
2217         unsigned int gc_mode = sbi->gc_mode;
2218         int err = 0;
2219         int ret;
2220         block_t unusable;
2221
2222         if (s_flags & SB_RDONLY) {
2223                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2224                 return -EINVAL;
2225         }
2226         sbi->sb->s_flags |= SB_ACTIVE;
2227
2228         /* check if we need more GC first */
2229         unusable = f2fs_get_unusable_blocks(sbi);
2230         if (!f2fs_disable_cp_again(sbi, unusable))
2231                 goto skip_gc;
2232
2233         f2fs_update_time(sbi, DISABLE_TIME);
2234
2235         sbi->gc_mode = GC_URGENT_HIGH;
2236
2237         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2238                 struct f2fs_gc_control gc_control = {
2239                         .victim_segno = NULL_SEGNO,
2240                         .init_gc_type = FG_GC,
2241                         .should_migrate_blocks = false,
2242                         .err_gc_skipped = true,
2243                         .nr_free_secs = 1 };
2244
2245                 f2fs_down_write(&sbi->gc_lock);
2246                 stat_inc_gc_call_count(sbi, FOREGROUND);
2247                 err = f2fs_gc(sbi, &gc_control);
2248                 if (err == -ENODATA) {
2249                         err = 0;
2250                         break;
2251                 }
2252                 if (err && err != -EAGAIN)
2253                         break;
2254         }
2255
2256         ret = sync_filesystem(sbi->sb);
2257         if (ret || err) {
2258                 err = ret ? ret : err;
2259                 goto restore_flag;
2260         }
2261
2262         unusable = f2fs_get_unusable_blocks(sbi);
2263         if (f2fs_disable_cp_again(sbi, unusable)) {
2264                 err = -EAGAIN;
2265                 goto restore_flag;
2266         }
2267
2268 skip_gc:
2269         f2fs_down_write(&sbi->gc_lock);
2270         cpc.reason = CP_PAUSE;
2271         set_sbi_flag(sbi, SBI_CP_DISABLED);
2272         stat_inc_cp_call_count(sbi, TOTAL_CALL);
2273         err = f2fs_write_checkpoint(sbi, &cpc);
2274         if (err)
2275                 goto out_unlock;
2276
2277         spin_lock(&sbi->stat_lock);
2278         sbi->unusable_block_count = unusable;
2279         spin_unlock(&sbi->stat_lock);
2280
2281 out_unlock:
2282         f2fs_up_write(&sbi->gc_lock);
2283 restore_flag:
2284         sbi->gc_mode = gc_mode;
2285         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2286         return err;
2287 }
2288
2289 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2290 {
2291         int retry = DEFAULT_RETRY_IO_COUNT;
2292
2293         /* we should flush all the data to keep data consistency */
2294         do {
2295                 sync_inodes_sb(sbi->sb);
2296                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2297         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2298
2299         if (unlikely(retry < 0))
2300                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2301
2302         f2fs_down_write(&sbi->gc_lock);
2303         f2fs_dirty_to_prefree(sbi);
2304
2305         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2306         set_sbi_flag(sbi, SBI_IS_DIRTY);
2307         f2fs_up_write(&sbi->gc_lock);
2308
2309         f2fs_sync_fs(sbi->sb, 1);
2310
2311         /* Let's ensure there's no pending checkpoint anymore */
2312         f2fs_flush_ckpt_thread(sbi);
2313 }
2314
2315 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2316 {
2317         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2318         struct f2fs_mount_info org_mount_opt;
2319         unsigned long old_sb_flags;
2320         int err;
2321         bool need_restart_gc = false, need_stop_gc = false;
2322         bool need_restart_ckpt = false, need_stop_ckpt = false;
2323         bool need_restart_flush = false, need_stop_flush = false;
2324         bool need_restart_discard = false, need_stop_discard = false;
2325         bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2326         bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2327         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2328         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2329         bool no_atgc = !test_opt(sbi, ATGC);
2330         bool no_discard = !test_opt(sbi, DISCARD);
2331         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2332         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2333 #ifdef CONFIG_QUOTA
2334         int i, j;
2335 #endif
2336
2337         /*
2338          * Save the old mount options in case we
2339          * need to restore them.
2340          */
2341         org_mount_opt = sbi->mount_opt;
2342         old_sb_flags = sb->s_flags;
2343
2344 #ifdef CONFIG_QUOTA
2345         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2346         for (i = 0; i < MAXQUOTAS; i++) {
2347                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2348                         org_mount_opt.s_qf_names[i] =
2349                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2350                                 GFP_KERNEL);
2351                         if (!org_mount_opt.s_qf_names[i]) {
2352                                 for (j = 0; j < i; j++)
2353                                         kfree(org_mount_opt.s_qf_names[j]);
2354                                 return -ENOMEM;
2355                         }
2356                 } else {
2357                         org_mount_opt.s_qf_names[i] = NULL;
2358                 }
2359         }
2360 #endif
2361
2362         /* recover superblocks we couldn't write due to previous RO mount */
2363         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2364                 err = f2fs_commit_super(sbi, false);
2365                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2366                           err);
2367                 if (!err)
2368                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2369         }
2370
2371         default_options(sbi, true);
2372
2373         /* parse mount options */
2374         err = parse_options(sb, data, true);
2375         if (err)
2376                 goto restore_opts;
2377
2378         /* flush outstanding errors before changing fs state */
2379         flush_work(&sbi->s_error_work);
2380
2381         /*
2382          * Previous and new state of filesystem is RO,
2383          * so skip checking GC and FLUSH_MERGE conditions.
2384          */
2385         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2386                 goto skip;
2387
2388         if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
2389                 err = -EROFS;
2390                 goto restore_opts;
2391         }
2392
2393 #ifdef CONFIG_QUOTA
2394         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2395                 err = dquot_suspend(sb, -1);
2396                 if (err < 0)
2397                         goto restore_opts;
2398         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2399                 /* dquot_resume needs RW */
2400                 sb->s_flags &= ~SB_RDONLY;
2401                 if (sb_any_quota_suspended(sb)) {
2402                         dquot_resume(sb, -1);
2403                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2404                         err = f2fs_enable_quotas(sb);
2405                         if (err)
2406                                 goto restore_opts;
2407                 }
2408         }
2409 #endif
2410         if (f2fs_lfs_mode(sbi) && !IS_F2FS_IPU_DISABLE(sbi)) {
2411                 err = -EINVAL;
2412                 f2fs_warn(sbi, "LFS is not compatible with IPU");
2413                 goto restore_opts;
2414         }
2415
2416         /* disallow enable atgc dynamically */
2417         if (no_atgc == !!test_opt(sbi, ATGC)) {
2418                 err = -EINVAL;
2419                 f2fs_warn(sbi, "switch atgc option is not allowed");
2420                 goto restore_opts;
2421         }
2422
2423         /* disallow enable/disable extent_cache dynamically */
2424         if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2425                 err = -EINVAL;
2426                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2427                 goto restore_opts;
2428         }
2429         /* disallow enable/disable age extent_cache dynamically */
2430         if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2431                 err = -EINVAL;
2432                 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2433                 goto restore_opts;
2434         }
2435
2436         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2437                 err = -EINVAL;
2438                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2439                 goto restore_opts;
2440         }
2441
2442         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2443                 err = -EINVAL;
2444                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2445                 goto restore_opts;
2446         }
2447
2448         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2449                 err = -EINVAL;
2450                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2451                 goto restore_opts;
2452         }
2453
2454         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2455                 err = -EINVAL;
2456                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2457                 goto restore_opts;
2458         }
2459
2460         /*
2461          * We stop the GC thread if FS is mounted as RO
2462          * or if background_gc = off is passed in mount
2463          * option. Also sync the filesystem.
2464          */
2465         if ((*flags & SB_RDONLY) ||
2466                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2467                         !test_opt(sbi, GC_MERGE))) {
2468                 if (sbi->gc_thread) {
2469                         f2fs_stop_gc_thread(sbi);
2470                         need_restart_gc = true;
2471                 }
2472         } else if (!sbi->gc_thread) {
2473                 err = f2fs_start_gc_thread(sbi);
2474                 if (err)
2475                         goto restore_opts;
2476                 need_stop_gc = true;
2477         }
2478
2479         if (*flags & SB_RDONLY) {
2480                 sync_inodes_sb(sb);
2481
2482                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2483                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2484                 f2fs_sync_fs(sb, 1);
2485                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2486         }
2487
2488         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2489                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2490                 f2fs_stop_ckpt_thread(sbi);
2491                 need_restart_ckpt = true;
2492         } else {
2493                 /* Flush if the prevous checkpoint, if exists. */
2494                 f2fs_flush_ckpt_thread(sbi);
2495
2496                 err = f2fs_start_ckpt_thread(sbi);
2497                 if (err) {
2498                         f2fs_err(sbi,
2499                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2500                             err);
2501                         goto restore_gc;
2502                 }
2503                 need_stop_ckpt = true;
2504         }
2505
2506         /*
2507          * We stop issue flush thread if FS is mounted as RO
2508          * or if flush_merge is not passed in mount option.
2509          */
2510         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2511                 clear_opt(sbi, FLUSH_MERGE);
2512                 f2fs_destroy_flush_cmd_control(sbi, false);
2513                 need_restart_flush = true;
2514         } else {
2515                 err = f2fs_create_flush_cmd_control(sbi);
2516                 if (err)
2517                         goto restore_ckpt;
2518                 need_stop_flush = true;
2519         }
2520
2521         if (no_discard == !!test_opt(sbi, DISCARD)) {
2522                 if (test_opt(sbi, DISCARD)) {
2523                         err = f2fs_start_discard_thread(sbi);
2524                         if (err)
2525                                 goto restore_flush;
2526                         need_stop_discard = true;
2527                 } else {
2528                         f2fs_stop_discard_thread(sbi);
2529                         f2fs_issue_discard_timeout(sbi);
2530                         need_restart_discard = true;
2531                 }
2532         }
2533
2534         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2535                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2536                         err = f2fs_disable_checkpoint(sbi);
2537                         if (err)
2538                                 goto restore_discard;
2539                 } else {
2540                         f2fs_enable_checkpoint(sbi);
2541                 }
2542         }
2543
2544 skip:
2545 #ifdef CONFIG_QUOTA
2546         /* Release old quota file names */
2547         for (i = 0; i < MAXQUOTAS; i++)
2548                 kfree(org_mount_opt.s_qf_names[i]);
2549 #endif
2550         /* Update the POSIXACL Flag */
2551         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2552                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2553
2554         limit_reserve_root(sbi);
2555         adjust_unusable_cap_perc(sbi);
2556         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2557         return 0;
2558 restore_discard:
2559         if (need_restart_discard) {
2560                 if (f2fs_start_discard_thread(sbi))
2561                         f2fs_warn(sbi, "discard has been stopped");
2562         } else if (need_stop_discard) {
2563                 f2fs_stop_discard_thread(sbi);
2564         }
2565 restore_flush:
2566         if (need_restart_flush) {
2567                 if (f2fs_create_flush_cmd_control(sbi))
2568                         f2fs_warn(sbi, "background flush thread has stopped");
2569         } else if (need_stop_flush) {
2570                 clear_opt(sbi, FLUSH_MERGE);
2571                 f2fs_destroy_flush_cmd_control(sbi, false);
2572         }
2573 restore_ckpt:
2574         if (need_restart_ckpt) {
2575                 if (f2fs_start_ckpt_thread(sbi))
2576                         f2fs_warn(sbi, "background ckpt thread has stopped");
2577         } else if (need_stop_ckpt) {
2578                 f2fs_stop_ckpt_thread(sbi);
2579         }
2580 restore_gc:
2581         if (need_restart_gc) {
2582                 if (f2fs_start_gc_thread(sbi))
2583                         f2fs_warn(sbi, "background gc thread has stopped");
2584         } else if (need_stop_gc) {
2585                 f2fs_stop_gc_thread(sbi);
2586         }
2587 restore_opts:
2588 #ifdef CONFIG_QUOTA
2589         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2590         for (i = 0; i < MAXQUOTAS; i++) {
2591                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2592                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2593         }
2594 #endif
2595         sbi->mount_opt = org_mount_opt;
2596         sb->s_flags = old_sb_flags;
2597         return err;
2598 }
2599
2600 #ifdef CONFIG_QUOTA
2601 static bool f2fs_need_recovery(struct f2fs_sb_info *sbi)
2602 {
2603         /* need to recovery orphan */
2604         if (is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
2605                 return true;
2606         /* need to recovery data */
2607         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2608                 return false;
2609         if (test_opt(sbi, NORECOVERY))
2610                 return false;
2611         return !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG);
2612 }
2613
2614 static bool f2fs_recover_quota_begin(struct f2fs_sb_info *sbi)
2615 {
2616         bool readonly = f2fs_readonly(sbi->sb);
2617
2618         if (!f2fs_need_recovery(sbi))
2619                 return false;
2620
2621         /* it doesn't need to check f2fs_sb_has_readonly() */
2622         if (f2fs_hw_is_readonly(sbi))
2623                 return false;
2624
2625         if (readonly) {
2626                 sbi->sb->s_flags &= ~SB_RDONLY;
2627                 set_sbi_flag(sbi, SBI_IS_WRITABLE);
2628         }
2629
2630         /*
2631          * Turn on quotas which were not enabled for read-only mounts if
2632          * filesystem has quota feature, so that they are updated correctly.
2633          */
2634         return f2fs_enable_quota_files(sbi, readonly);
2635 }
2636
2637 static void f2fs_recover_quota_end(struct f2fs_sb_info *sbi,
2638                                                 bool quota_enabled)
2639 {
2640         if (quota_enabled)
2641                 f2fs_quota_off_umount(sbi->sb);
2642
2643         if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE)) {
2644                 clear_sbi_flag(sbi, SBI_IS_WRITABLE);
2645                 sbi->sb->s_flags |= SB_RDONLY;
2646         }
2647 }
2648
2649 /* Read data from quotafile */
2650 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2651                                size_t len, loff_t off)
2652 {
2653         struct inode *inode = sb_dqopt(sb)->files[type];
2654         struct address_space *mapping = inode->i_mapping;
2655         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2656         int offset = off & (sb->s_blocksize - 1);
2657         int tocopy;
2658         size_t toread;
2659         loff_t i_size = i_size_read(inode);
2660         struct page *page;
2661
2662         if (off > i_size)
2663                 return 0;
2664
2665         if (off + len > i_size)
2666                 len = i_size - off;
2667         toread = len;
2668         while (toread > 0) {
2669                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2670 repeat:
2671                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2672                 if (IS_ERR(page)) {
2673                         if (PTR_ERR(page) == -ENOMEM) {
2674                                 memalloc_retry_wait(GFP_NOFS);
2675                                 goto repeat;
2676                         }
2677                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2678                         return PTR_ERR(page);
2679                 }
2680
2681                 lock_page(page);
2682
2683                 if (unlikely(page->mapping != mapping)) {
2684                         f2fs_put_page(page, 1);
2685                         goto repeat;
2686                 }
2687                 if (unlikely(!PageUptodate(page))) {
2688                         f2fs_put_page(page, 1);
2689                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2690                         return -EIO;
2691                 }
2692
2693                 memcpy_from_page(data, page, offset, tocopy);
2694                 f2fs_put_page(page, 1);
2695
2696                 offset = 0;
2697                 toread -= tocopy;
2698                 data += tocopy;
2699                 blkidx++;
2700         }
2701         return len;
2702 }
2703
2704 /* Write to quotafile */
2705 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2706                                 const char *data, size_t len, loff_t off)
2707 {
2708         struct inode *inode = sb_dqopt(sb)->files[type];
2709         struct address_space *mapping = inode->i_mapping;
2710         const struct address_space_operations *a_ops = mapping->a_ops;
2711         int offset = off & (sb->s_blocksize - 1);
2712         size_t towrite = len;
2713         struct page *page;
2714         void *fsdata = NULL;
2715         int err = 0;
2716         int tocopy;
2717
2718         while (towrite > 0) {
2719                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2720                                                                 towrite);
2721 retry:
2722                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2723                                                         &page, &fsdata);
2724                 if (unlikely(err)) {
2725                         if (err == -ENOMEM) {
2726                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2727                                 goto retry;
2728                         }
2729                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2730                         break;
2731                 }
2732
2733                 memcpy_to_page(page, offset, data, tocopy);
2734
2735                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2736                                                 page, fsdata);
2737                 offset = 0;
2738                 towrite -= tocopy;
2739                 off += tocopy;
2740                 data += tocopy;
2741                 cond_resched();
2742         }
2743
2744         if (len == towrite)
2745                 return err;
2746         inode->i_mtime = inode_set_ctime_current(inode);
2747         f2fs_mark_inode_dirty_sync(inode, false);
2748         return len - towrite;
2749 }
2750
2751 int f2fs_dquot_initialize(struct inode *inode)
2752 {
2753         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT))
2754                 return -ESRCH;
2755
2756         return dquot_initialize(inode);
2757 }
2758
2759 static struct dquot **f2fs_get_dquots(struct inode *inode)
2760 {
2761         return F2FS_I(inode)->i_dquot;
2762 }
2763
2764 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2765 {
2766         return &F2FS_I(inode)->i_reserved_quota;
2767 }
2768
2769 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2770 {
2771         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2772                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2773                 return 0;
2774         }
2775
2776         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2777                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2778 }
2779
2780 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2781 {
2782         int enabled = 0;
2783         int i, err;
2784
2785         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2786                 err = f2fs_enable_quotas(sbi->sb);
2787                 if (err) {
2788                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2789                         return 0;
2790                 }
2791                 return 1;
2792         }
2793
2794         for (i = 0; i < MAXQUOTAS; i++) {
2795                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2796                         err = f2fs_quota_on_mount(sbi, i);
2797                         if (!err) {
2798                                 enabled = 1;
2799                                 continue;
2800                         }
2801                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2802                                  err, i);
2803                 }
2804         }
2805         return enabled;
2806 }
2807
2808 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2809                              unsigned int flags)
2810 {
2811         struct inode *qf_inode;
2812         unsigned long qf_inum;
2813         unsigned long qf_flag = F2FS_QUOTA_DEFAULT_FL;
2814         int err;
2815
2816         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2817
2818         qf_inum = f2fs_qf_ino(sb, type);
2819         if (!qf_inum)
2820                 return -EPERM;
2821
2822         qf_inode = f2fs_iget(sb, qf_inum);
2823         if (IS_ERR(qf_inode)) {
2824                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2825                 return PTR_ERR(qf_inode);
2826         }
2827
2828         /* Don't account quota for quota files to avoid recursion */
2829         inode_lock(qf_inode);
2830         qf_inode->i_flags |= S_NOQUOTA;
2831
2832         if ((F2FS_I(qf_inode)->i_flags & qf_flag) != qf_flag) {
2833                 F2FS_I(qf_inode)->i_flags |= qf_flag;
2834                 f2fs_set_inode_flags(qf_inode);
2835         }
2836         inode_unlock(qf_inode);
2837
2838         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2839         iput(qf_inode);
2840         return err;
2841 }
2842
2843 static int f2fs_enable_quotas(struct super_block *sb)
2844 {
2845         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2846         int type, err = 0;
2847         unsigned long qf_inum;
2848         bool quota_mopt[MAXQUOTAS] = {
2849                 test_opt(sbi, USRQUOTA),
2850                 test_opt(sbi, GRPQUOTA),
2851                 test_opt(sbi, PRJQUOTA),
2852         };
2853
2854         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2855                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2856                 return 0;
2857         }
2858
2859         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2860
2861         for (type = 0; type < MAXQUOTAS; type++) {
2862                 qf_inum = f2fs_qf_ino(sb, type);
2863                 if (qf_inum) {
2864                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2865                                 DQUOT_USAGE_ENABLED |
2866                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2867                         if (err) {
2868                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2869                                          type, err);
2870                                 for (type--; type >= 0; type--)
2871                                         dquot_quota_off(sb, type);
2872                                 set_sbi_flag(F2FS_SB(sb),
2873                                                 SBI_QUOTA_NEED_REPAIR);
2874                                 return err;
2875                         }
2876                 }
2877         }
2878         return 0;
2879 }
2880
2881 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2882 {
2883         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2884         struct address_space *mapping = dqopt->files[type]->i_mapping;
2885         int ret = 0;
2886
2887         ret = dquot_writeback_dquots(sbi->sb, type);
2888         if (ret)
2889                 goto out;
2890
2891         ret = filemap_fdatawrite(mapping);
2892         if (ret)
2893                 goto out;
2894
2895         /* if we are using journalled quota */
2896         if (is_journalled_quota(sbi))
2897                 goto out;
2898
2899         ret = filemap_fdatawait(mapping);
2900
2901         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2902 out:
2903         if (ret)
2904                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2905         return ret;
2906 }
2907
2908 int f2fs_quota_sync(struct super_block *sb, int type)
2909 {
2910         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2911         struct quota_info *dqopt = sb_dqopt(sb);
2912         int cnt;
2913         int ret = 0;
2914
2915         /*
2916          * Now when everything is written we can discard the pagecache so
2917          * that userspace sees the changes.
2918          */
2919         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2920
2921                 if (type != -1 && cnt != type)
2922                         continue;
2923
2924                 if (!sb_has_quota_active(sb, cnt))
2925                         continue;
2926
2927                 if (!f2fs_sb_has_quota_ino(sbi))
2928                         inode_lock(dqopt->files[cnt]);
2929
2930                 /*
2931                  * do_quotactl
2932                  *  f2fs_quota_sync
2933                  *  f2fs_down_read(quota_sem)
2934                  *  dquot_writeback_dquots()
2935                  *  f2fs_dquot_commit
2936                  *                            block_operation
2937                  *                            f2fs_down_read(quota_sem)
2938                  */
2939                 f2fs_lock_op(sbi);
2940                 f2fs_down_read(&sbi->quota_sem);
2941
2942                 ret = f2fs_quota_sync_file(sbi, cnt);
2943
2944                 f2fs_up_read(&sbi->quota_sem);
2945                 f2fs_unlock_op(sbi);
2946
2947                 if (!f2fs_sb_has_quota_ino(sbi))
2948                         inode_unlock(dqopt->files[cnt]);
2949
2950                 if (ret)
2951                         break;
2952         }
2953         return ret;
2954 }
2955
2956 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2957                                                         const struct path *path)
2958 {
2959         struct inode *inode;
2960         int err;
2961
2962         /* if quota sysfile exists, deny enabling quota with specific file */
2963         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2964                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2965                 return -EBUSY;
2966         }
2967
2968         if (path->dentry->d_sb != sb)
2969                 return -EXDEV;
2970
2971         err = f2fs_quota_sync(sb, type);
2972         if (err)
2973                 return err;
2974
2975         inode = d_inode(path->dentry);
2976
2977         err = filemap_fdatawrite(inode->i_mapping);
2978         if (err)
2979                 return err;
2980
2981         err = filemap_fdatawait(inode->i_mapping);
2982         if (err)
2983                 return err;
2984
2985         err = dquot_quota_on(sb, type, format_id, path);
2986         if (err)
2987                 return err;
2988
2989         inode_lock(inode);
2990         F2FS_I(inode)->i_flags |= F2FS_QUOTA_DEFAULT_FL;
2991         f2fs_set_inode_flags(inode);
2992         inode_unlock(inode);
2993         f2fs_mark_inode_dirty_sync(inode, false);
2994
2995         return 0;
2996 }
2997
2998 static int __f2fs_quota_off(struct super_block *sb, int type)
2999 {
3000         struct inode *inode = sb_dqopt(sb)->files[type];
3001         int err;
3002
3003         if (!inode || !igrab(inode))
3004                 return dquot_quota_off(sb, type);
3005
3006         err = f2fs_quota_sync(sb, type);
3007         if (err)
3008                 goto out_put;
3009
3010         err = dquot_quota_off(sb, type);
3011         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
3012                 goto out_put;
3013
3014         inode_lock(inode);
3015         F2FS_I(inode)->i_flags &= ~F2FS_QUOTA_DEFAULT_FL;
3016         f2fs_set_inode_flags(inode);
3017         inode_unlock(inode);
3018         f2fs_mark_inode_dirty_sync(inode, false);
3019 out_put:
3020         iput(inode);
3021         return err;
3022 }
3023
3024 static int f2fs_quota_off(struct super_block *sb, int type)
3025 {
3026         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3027         int err;
3028
3029         err = __f2fs_quota_off(sb, type);
3030
3031         /*
3032          * quotactl can shutdown journalled quota, result in inconsistence
3033          * between quota record and fs data by following updates, tag the
3034          * flag to let fsck be aware of it.
3035          */
3036         if (is_journalled_quota(sbi))
3037                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3038         return err;
3039 }
3040
3041 void f2fs_quota_off_umount(struct super_block *sb)
3042 {
3043         int type;
3044         int err;
3045
3046         for (type = 0; type < MAXQUOTAS; type++) {
3047                 err = __f2fs_quota_off(sb, type);
3048                 if (err) {
3049                         int ret = dquot_quota_off(sb, type);
3050
3051                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
3052                                  type, err, ret);
3053                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
3054                 }
3055         }
3056         /*
3057          * In case of checkpoint=disable, we must flush quota blocks.
3058          * This can cause NULL exception for node_inode in end_io, since
3059          * put_super already dropped it.
3060          */
3061         sync_filesystem(sb);
3062 }
3063
3064 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
3065 {
3066         struct quota_info *dqopt = sb_dqopt(sb);
3067         int type;
3068
3069         for (type = 0; type < MAXQUOTAS; type++) {
3070                 if (!dqopt->files[type])
3071                         continue;
3072                 f2fs_inode_synced(dqopt->files[type]);
3073         }
3074 }
3075
3076 static int f2fs_dquot_commit(struct dquot *dquot)
3077 {
3078         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3079         int ret;
3080
3081         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
3082         ret = dquot_commit(dquot);
3083         if (ret < 0)
3084                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3085         f2fs_up_read(&sbi->quota_sem);
3086         return ret;
3087 }
3088
3089 static int f2fs_dquot_acquire(struct dquot *dquot)
3090 {
3091         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3092         int ret;
3093
3094         f2fs_down_read(&sbi->quota_sem);
3095         ret = dquot_acquire(dquot);
3096         if (ret < 0)
3097                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3098         f2fs_up_read(&sbi->quota_sem);
3099         return ret;
3100 }
3101
3102 static int f2fs_dquot_release(struct dquot *dquot)
3103 {
3104         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3105         int ret = dquot_release(dquot);
3106
3107         if (ret < 0)
3108                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3109         return ret;
3110 }
3111
3112 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
3113 {
3114         struct super_block *sb = dquot->dq_sb;
3115         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3116         int ret = dquot_mark_dquot_dirty(dquot);
3117
3118         /* if we are using journalled quota */
3119         if (is_journalled_quota(sbi))
3120                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
3121
3122         return ret;
3123 }
3124
3125 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
3126 {
3127         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3128         int ret = dquot_commit_info(sb, type);
3129
3130         if (ret < 0)
3131                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3132         return ret;
3133 }
3134
3135 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
3136 {
3137         *projid = F2FS_I(inode)->i_projid;
3138         return 0;
3139 }
3140
3141 static const struct dquot_operations f2fs_quota_operations = {
3142         .get_reserved_space = f2fs_get_reserved_space,
3143         .write_dquot    = f2fs_dquot_commit,
3144         .acquire_dquot  = f2fs_dquot_acquire,
3145         .release_dquot  = f2fs_dquot_release,
3146         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
3147         .write_info     = f2fs_dquot_commit_info,
3148         .alloc_dquot    = dquot_alloc,
3149         .destroy_dquot  = dquot_destroy,
3150         .get_projid     = f2fs_get_projid,
3151         .get_next_id    = dquot_get_next_id,
3152 };
3153
3154 static const struct quotactl_ops f2fs_quotactl_ops = {
3155         .quota_on       = f2fs_quota_on,
3156         .quota_off      = f2fs_quota_off,
3157         .quota_sync     = f2fs_quota_sync,
3158         .get_state      = dquot_get_state,
3159         .set_info       = dquot_set_dqinfo,
3160         .get_dqblk      = dquot_get_dqblk,
3161         .set_dqblk      = dquot_set_dqblk,
3162         .get_nextdqblk  = dquot_get_next_dqblk,
3163 };
3164 #else
3165 int f2fs_dquot_initialize(struct inode *inode)
3166 {
3167         return 0;
3168 }
3169
3170 int f2fs_quota_sync(struct super_block *sb, int type)
3171 {
3172         return 0;
3173 }
3174
3175 void f2fs_quota_off_umount(struct super_block *sb)
3176 {
3177 }
3178 #endif
3179
3180 static const struct super_operations f2fs_sops = {
3181         .alloc_inode    = f2fs_alloc_inode,
3182         .free_inode     = f2fs_free_inode,
3183         .drop_inode     = f2fs_drop_inode,
3184         .write_inode    = f2fs_write_inode,
3185         .dirty_inode    = f2fs_dirty_inode,
3186         .show_options   = f2fs_show_options,
3187 #ifdef CONFIG_QUOTA
3188         .quota_read     = f2fs_quota_read,
3189         .quota_write    = f2fs_quota_write,
3190         .get_dquots     = f2fs_get_dquots,
3191 #endif
3192         .evict_inode    = f2fs_evict_inode,
3193         .put_super      = f2fs_put_super,
3194         .sync_fs        = f2fs_sync_fs,
3195         .freeze_fs      = f2fs_freeze,
3196         .unfreeze_fs    = f2fs_unfreeze,
3197         .statfs         = f2fs_statfs,
3198         .remount_fs     = f2fs_remount,
3199 };
3200
3201 #ifdef CONFIG_FS_ENCRYPTION
3202 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3203 {
3204         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3205                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3206                                 ctx, len, NULL);
3207 }
3208
3209 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3210                                                         void *fs_data)
3211 {
3212         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3213
3214         /*
3215          * Encrypting the root directory is not allowed because fsck
3216          * expects lost+found directory to exist and remain unencrypted
3217          * if LOST_FOUND feature is enabled.
3218          *
3219          */
3220         if (f2fs_sb_has_lost_found(sbi) &&
3221                         inode->i_ino == F2FS_ROOT_INO(sbi))
3222                 return -EPERM;
3223
3224         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3225                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3226                                 ctx, len, fs_data, XATTR_CREATE);
3227 }
3228
3229 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3230 {
3231         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3232 }
3233
3234 static bool f2fs_has_stable_inodes(struct super_block *sb)
3235 {
3236         return true;
3237 }
3238
3239 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3240                                        int *ino_bits_ret, int *lblk_bits_ret)
3241 {
3242         *ino_bits_ret = 8 * sizeof(nid_t);
3243         *lblk_bits_ret = 8 * sizeof(block_t);
3244 }
3245
3246 static struct block_device **f2fs_get_devices(struct super_block *sb,
3247                                               unsigned int *num_devs)
3248 {
3249         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3250         struct block_device **devs;
3251         int i;
3252
3253         if (!f2fs_is_multi_device(sbi))
3254                 return NULL;
3255
3256         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3257         if (!devs)
3258                 return ERR_PTR(-ENOMEM);
3259
3260         for (i = 0; i < sbi->s_ndevs; i++)
3261                 devs[i] = FDEV(i).bdev;
3262         *num_devs = sbi->s_ndevs;
3263         return devs;
3264 }
3265
3266 static const struct fscrypt_operations f2fs_cryptops = {
3267         .key_prefix             = "f2fs:",
3268         .get_context            = f2fs_get_context,
3269         .set_context            = f2fs_set_context,
3270         .get_dummy_policy       = f2fs_get_dummy_policy,
3271         .empty_dir              = f2fs_empty_dir,
3272         .has_stable_inodes      = f2fs_has_stable_inodes,
3273         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3274         .get_devices            = f2fs_get_devices,
3275 };
3276 #endif
3277
3278 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3279                 u64 ino, u32 generation)
3280 {
3281         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3282         struct inode *inode;
3283
3284         if (f2fs_check_nid_range(sbi, ino))
3285                 return ERR_PTR(-ESTALE);
3286
3287         /*
3288          * f2fs_iget isn't quite right if the inode is currently unallocated!
3289          * However f2fs_iget currently does appropriate checks to handle stale
3290          * inodes so everything is OK.
3291          */
3292         inode = f2fs_iget(sb, ino);
3293         if (IS_ERR(inode))
3294                 return ERR_CAST(inode);
3295         if (unlikely(generation && inode->i_generation != generation)) {
3296                 /* we didn't find the right inode.. */
3297                 iput(inode);
3298                 return ERR_PTR(-ESTALE);
3299         }
3300         return inode;
3301 }
3302
3303 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3304                 int fh_len, int fh_type)
3305 {
3306         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3307                                     f2fs_nfs_get_inode);
3308 }
3309
3310 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3311                 int fh_len, int fh_type)
3312 {
3313         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3314                                     f2fs_nfs_get_inode);
3315 }
3316
3317 static const struct export_operations f2fs_export_ops = {
3318         .fh_to_dentry = f2fs_fh_to_dentry,
3319         .fh_to_parent = f2fs_fh_to_parent,
3320         .get_parent = f2fs_get_parent,
3321 };
3322
3323 loff_t max_file_blocks(struct inode *inode)
3324 {
3325         loff_t result = 0;
3326         loff_t leaf_count;
3327
3328         /*
3329          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3330          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3331          * space in inode.i_addr, it will be more safe to reassign
3332          * result as zero.
3333          */
3334
3335         if (inode && f2fs_compressed_file(inode))
3336                 leaf_count = ADDRS_PER_BLOCK(inode);
3337         else
3338                 leaf_count = DEF_ADDRS_PER_BLOCK;
3339
3340         /* two direct node blocks */
3341         result += (leaf_count * 2);
3342
3343         /* two indirect node blocks */
3344         leaf_count *= NIDS_PER_BLOCK;
3345         result += (leaf_count * 2);
3346
3347         /* one double indirect node block */
3348         leaf_count *= NIDS_PER_BLOCK;
3349         result += leaf_count;
3350
3351         return result;
3352 }
3353
3354 static int __f2fs_commit_super(struct buffer_head *bh,
3355                         struct f2fs_super_block *super)
3356 {
3357         lock_buffer(bh);
3358         if (super)
3359                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3360         set_buffer_dirty(bh);
3361         unlock_buffer(bh);
3362
3363         /* it's rare case, we can do fua all the time */
3364         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3365 }
3366
3367 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3368                                         struct buffer_head *bh)
3369 {
3370         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3371                                         (bh->b_data + F2FS_SUPER_OFFSET);
3372         struct super_block *sb = sbi->sb;
3373         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3374         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3375         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3376         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3377         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3378         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3379         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3380         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3381         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3382         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3383         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3384         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3385         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3386         u64 main_end_blkaddr = main_blkaddr +
3387                                 (segment_count_main << log_blocks_per_seg);
3388         u64 seg_end_blkaddr = segment0_blkaddr +
3389                                 (segment_count << log_blocks_per_seg);
3390
3391         if (segment0_blkaddr != cp_blkaddr) {
3392                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3393                           segment0_blkaddr, cp_blkaddr);
3394                 return true;
3395         }
3396
3397         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3398                                                         sit_blkaddr) {
3399                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3400                           cp_blkaddr, sit_blkaddr,
3401                           segment_count_ckpt << log_blocks_per_seg);
3402                 return true;
3403         }
3404
3405         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3406                                                         nat_blkaddr) {
3407                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3408                           sit_blkaddr, nat_blkaddr,
3409                           segment_count_sit << log_blocks_per_seg);
3410                 return true;
3411         }
3412
3413         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3414                                                         ssa_blkaddr) {
3415                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3416                           nat_blkaddr, ssa_blkaddr,
3417                           segment_count_nat << log_blocks_per_seg);
3418                 return true;
3419         }
3420
3421         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3422                                                         main_blkaddr) {
3423                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3424                           ssa_blkaddr, main_blkaddr,
3425                           segment_count_ssa << log_blocks_per_seg);
3426                 return true;
3427         }
3428
3429         if (main_end_blkaddr > seg_end_blkaddr) {
3430                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3431                           main_blkaddr, seg_end_blkaddr,
3432                           segment_count_main << log_blocks_per_seg);
3433                 return true;
3434         } else if (main_end_blkaddr < seg_end_blkaddr) {
3435                 int err = 0;
3436                 char *res;
3437
3438                 /* fix in-memory information all the time */
3439                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3440                                 segment0_blkaddr) >> log_blocks_per_seg);
3441
3442                 if (f2fs_readonly(sb) || f2fs_hw_is_readonly(sbi)) {
3443                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3444                         res = "internally";
3445                 } else {
3446                         err = __f2fs_commit_super(bh, NULL);
3447                         res = err ? "failed" : "done";
3448                 }
3449                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3450                           res, main_blkaddr, seg_end_blkaddr,
3451                           segment_count_main << log_blocks_per_seg);
3452                 if (err)
3453                         return true;
3454         }
3455         return false;
3456 }
3457
3458 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3459                                 struct buffer_head *bh)
3460 {
3461         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3462         block_t total_sections, blocks_per_seg;
3463         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3464                                         (bh->b_data + F2FS_SUPER_OFFSET);
3465         size_t crc_offset = 0;
3466         __u32 crc = 0;
3467
3468         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3469                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3470                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3471                 return -EINVAL;
3472         }
3473
3474         /* Check checksum_offset and crc in superblock */
3475         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3476                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3477                 if (crc_offset !=
3478                         offsetof(struct f2fs_super_block, crc)) {
3479                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3480                                   crc_offset);
3481                         return -EFSCORRUPTED;
3482                 }
3483                 crc = le32_to_cpu(raw_super->crc);
3484                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3485                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3486                         return -EFSCORRUPTED;
3487                 }
3488         }
3489
3490         /* Currently, support only 4KB block size */
3491         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3492                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3493                           le32_to_cpu(raw_super->log_blocksize),
3494                           F2FS_BLKSIZE_BITS);
3495                 return -EFSCORRUPTED;
3496         }
3497
3498         /* check log blocks per segment */
3499         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3500                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3501                           le32_to_cpu(raw_super->log_blocks_per_seg));
3502                 return -EFSCORRUPTED;
3503         }
3504
3505         /* Currently, support 512/1024/2048/4096 bytes sector size */
3506         if (le32_to_cpu(raw_super->log_sectorsize) >
3507                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3508                 le32_to_cpu(raw_super->log_sectorsize) <
3509                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3510                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3511                           le32_to_cpu(raw_super->log_sectorsize));
3512                 return -EFSCORRUPTED;
3513         }
3514         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3515                 le32_to_cpu(raw_super->log_sectorsize) !=
3516                         F2FS_MAX_LOG_SECTOR_SIZE) {
3517                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3518                           le32_to_cpu(raw_super->log_sectors_per_block),
3519                           le32_to_cpu(raw_super->log_sectorsize));
3520                 return -EFSCORRUPTED;
3521         }
3522
3523         segment_count = le32_to_cpu(raw_super->segment_count);
3524         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3525         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3526         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3527         total_sections = le32_to_cpu(raw_super->section_count);
3528
3529         /* blocks_per_seg should be 512, given the above check */
3530         blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg));
3531
3532         if (segment_count > F2FS_MAX_SEGMENT ||
3533                                 segment_count < F2FS_MIN_SEGMENTS) {
3534                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3535                 return -EFSCORRUPTED;
3536         }
3537
3538         if (total_sections > segment_count_main || total_sections < 1 ||
3539                         segs_per_sec > segment_count || !segs_per_sec) {
3540                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3541                           segment_count, total_sections, segs_per_sec);
3542                 return -EFSCORRUPTED;
3543         }
3544
3545         if (segment_count_main != total_sections * segs_per_sec) {
3546                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3547                           segment_count_main, total_sections, segs_per_sec);
3548                 return -EFSCORRUPTED;
3549         }
3550
3551         if ((segment_count / segs_per_sec) < total_sections) {
3552                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3553                           segment_count, segs_per_sec, total_sections);
3554                 return -EFSCORRUPTED;
3555         }
3556
3557         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3558                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3559                           segment_count, le64_to_cpu(raw_super->block_count));
3560                 return -EFSCORRUPTED;
3561         }
3562
3563         if (RDEV(0).path[0]) {
3564                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3565                 int i = 1;
3566
3567                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3568                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3569                         i++;
3570                 }
3571                 if (segment_count != dev_seg_count) {
3572                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3573                                         segment_count, dev_seg_count);
3574                         return -EFSCORRUPTED;
3575                 }
3576         } else {
3577                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3578                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3579                         f2fs_info(sbi, "Zoned block device path is missing");
3580                         return -EFSCORRUPTED;
3581                 }
3582         }
3583
3584         if (secs_per_zone > total_sections || !secs_per_zone) {
3585                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3586                           secs_per_zone, total_sections);
3587                 return -EFSCORRUPTED;
3588         }
3589         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3590                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3591                         (le32_to_cpu(raw_super->extension_count) +
3592                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3593                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3594                           le32_to_cpu(raw_super->extension_count),
3595                           raw_super->hot_ext_count,
3596                           F2FS_MAX_EXTENSION);
3597                 return -EFSCORRUPTED;
3598         }
3599
3600         if (le32_to_cpu(raw_super->cp_payload) >=
3601                                 (blocks_per_seg - F2FS_CP_PACKS -
3602                                 NR_CURSEG_PERSIST_TYPE)) {
3603                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3604                           le32_to_cpu(raw_super->cp_payload),
3605                           blocks_per_seg - F2FS_CP_PACKS -
3606                           NR_CURSEG_PERSIST_TYPE);
3607                 return -EFSCORRUPTED;
3608         }
3609
3610         /* check reserved ino info */
3611         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3612                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3613                 le32_to_cpu(raw_super->root_ino) != 3) {
3614                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3615                           le32_to_cpu(raw_super->node_ino),
3616                           le32_to_cpu(raw_super->meta_ino),
3617                           le32_to_cpu(raw_super->root_ino));
3618                 return -EFSCORRUPTED;
3619         }
3620
3621         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3622         if (sanity_check_area_boundary(sbi, bh))
3623                 return -EFSCORRUPTED;
3624
3625         return 0;
3626 }
3627
3628 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3629 {
3630         unsigned int total, fsmeta;
3631         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3632         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3633         unsigned int ovp_segments, reserved_segments;
3634         unsigned int main_segs, blocks_per_seg;
3635         unsigned int sit_segs, nat_segs;
3636         unsigned int sit_bitmap_size, nat_bitmap_size;
3637         unsigned int log_blocks_per_seg;
3638         unsigned int segment_count_main;
3639         unsigned int cp_pack_start_sum, cp_payload;
3640         block_t user_block_count, valid_user_blocks;
3641         block_t avail_node_count, valid_node_count;
3642         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3643         int i, j;
3644
3645         total = le32_to_cpu(raw_super->segment_count);
3646         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3647         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3648         fsmeta += sit_segs;
3649         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3650         fsmeta += nat_segs;
3651         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3652         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3653
3654         if (unlikely(fsmeta >= total))
3655                 return 1;
3656
3657         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3658         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3659
3660         if (!f2fs_sb_has_readonly(sbi) &&
3661                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3662                         ovp_segments == 0 || reserved_segments == 0)) {
3663                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3664                 return 1;
3665         }
3666         user_block_count = le64_to_cpu(ckpt->user_block_count);
3667         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3668                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3669         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3670         if (!user_block_count || user_block_count >=
3671                         segment_count_main << log_blocks_per_seg) {
3672                 f2fs_err(sbi, "Wrong user_block_count: %u",
3673                          user_block_count);
3674                 return 1;
3675         }
3676
3677         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3678         if (valid_user_blocks > user_block_count) {
3679                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3680                          valid_user_blocks, user_block_count);
3681                 return 1;
3682         }
3683
3684         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3685         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3686         if (valid_node_count > avail_node_count) {
3687                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3688                          valid_node_count, avail_node_count);
3689                 return 1;
3690         }
3691
3692         main_segs = le32_to_cpu(raw_super->segment_count_main);
3693         blocks_per_seg = sbi->blocks_per_seg;
3694
3695         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3696                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3697                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3698                         return 1;
3699
3700                 if (f2fs_sb_has_readonly(sbi))
3701                         goto check_data;
3702
3703                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3704                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3705                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3706                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3707                                          i, j,
3708                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3709                                 return 1;
3710                         }
3711                 }
3712         }
3713 check_data:
3714         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3715                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3716                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3717                         return 1;
3718
3719                 if (f2fs_sb_has_readonly(sbi))
3720                         goto skip_cross;
3721
3722                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3723                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3724                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3725                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3726                                          i, j,
3727                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3728                                 return 1;
3729                         }
3730                 }
3731         }
3732         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3733                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3734                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3735                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3736                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3737                                          i, j,
3738                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3739                                 return 1;
3740                         }
3741                 }
3742         }
3743 skip_cross:
3744         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3745         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3746
3747         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3748                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3749                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3750                          sit_bitmap_size, nat_bitmap_size);
3751                 return 1;
3752         }
3753
3754         cp_pack_start_sum = __start_sum_addr(sbi);
3755         cp_payload = __cp_payload(sbi);
3756         if (cp_pack_start_sum < cp_payload + 1 ||
3757                 cp_pack_start_sum > blocks_per_seg - 1 -
3758                         NR_CURSEG_PERSIST_TYPE) {
3759                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3760                          cp_pack_start_sum);
3761                 return 1;
3762         }
3763
3764         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3765                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3766                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3767                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3768                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3769                           le32_to_cpu(ckpt->checksum_offset));
3770                 return 1;
3771         }
3772
3773         nat_blocks = nat_segs << log_blocks_per_seg;
3774         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3775         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3776         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3777                 (cp_payload + F2FS_CP_PACKS +
3778                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3779                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3780                           cp_payload, nat_bits_blocks);
3781                 return 1;
3782         }
3783
3784         if (unlikely(f2fs_cp_error(sbi))) {
3785                 f2fs_err(sbi, "A bug case: need to run fsck");
3786                 return 1;
3787         }
3788         return 0;
3789 }
3790
3791 static void init_sb_info(struct f2fs_sb_info *sbi)
3792 {
3793         struct f2fs_super_block *raw_super = sbi->raw_super;
3794         int i;
3795
3796         sbi->log_sectors_per_block =
3797                 le32_to_cpu(raw_super->log_sectors_per_block);
3798         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3799         sbi->blocksize = BIT(sbi->log_blocksize);
3800         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3801         sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg);
3802         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3803         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3804         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3805         sbi->total_node_count =
3806                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3807                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3808         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3809         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3810         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3811         sbi->cur_victim_sec = NULL_SECNO;
3812         sbi->gc_mode = GC_NORMAL;
3813         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3814         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3815         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3816         sbi->migration_granularity = sbi->segs_per_sec;
3817         sbi->seq_file_ra_mul = MIN_RA_MUL;
3818         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3819         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3820         spin_lock_init(&sbi->gc_remaining_trials_lock);
3821         atomic64_set(&sbi->current_atomic_write, 0);
3822
3823         sbi->dir_level = DEF_DIR_LEVEL;
3824         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3825         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3826         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3827         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3828         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3829         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3830                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3831         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3832
3833         for (i = 0; i < NR_COUNT_TYPE; i++)
3834                 atomic_set(&sbi->nr_pages[i], 0);
3835
3836         for (i = 0; i < META; i++)
3837                 atomic_set(&sbi->wb_sync_req[i], 0);
3838
3839         INIT_LIST_HEAD(&sbi->s_list);
3840         mutex_init(&sbi->umount_mutex);
3841         init_f2fs_rwsem(&sbi->io_order_lock);
3842         spin_lock_init(&sbi->cp_lock);
3843
3844         sbi->dirty_device = 0;
3845         spin_lock_init(&sbi->dev_lock);
3846
3847         init_f2fs_rwsem(&sbi->sb_lock);
3848         init_f2fs_rwsem(&sbi->pin_sem);
3849 }
3850
3851 static int init_percpu_info(struct f2fs_sb_info *sbi)
3852 {
3853         int err;
3854
3855         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3856         if (err)
3857                 return err;
3858
3859         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3860         if (err)
3861                 goto err_valid_block;
3862
3863         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3864                                                                 GFP_KERNEL);
3865         if (err)
3866                 goto err_node_block;
3867         return 0;
3868
3869 err_node_block:
3870         percpu_counter_destroy(&sbi->rf_node_block_count);
3871 err_valid_block:
3872         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3873         return err;
3874 }
3875
3876 #ifdef CONFIG_BLK_DEV_ZONED
3877
3878 struct f2fs_report_zones_args {
3879         struct f2fs_sb_info *sbi;
3880         struct f2fs_dev_info *dev;
3881 };
3882
3883 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3884                               void *data)
3885 {
3886         struct f2fs_report_zones_args *rz_args = data;
3887         block_t unusable_blocks = (zone->len - zone->capacity) >>
3888                                         F2FS_LOG_SECTORS_PER_BLOCK;
3889
3890         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3891                 return 0;
3892
3893         set_bit(idx, rz_args->dev->blkz_seq);
3894         if (!rz_args->sbi->unusable_blocks_per_sec) {
3895                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3896                 return 0;
3897         }
3898         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3899                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3900                 return -EINVAL;
3901         }
3902         return 0;
3903 }
3904
3905 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3906 {
3907         struct block_device *bdev = FDEV(devi).bdev;
3908         sector_t nr_sectors = bdev_nr_sectors(bdev);
3909         struct f2fs_report_zones_args rep_zone_arg;
3910         u64 zone_sectors;
3911         int ret;
3912
3913         if (!f2fs_sb_has_blkzoned(sbi))
3914                 return 0;
3915
3916         zone_sectors = bdev_zone_sectors(bdev);
3917         if (!is_power_of_2(zone_sectors)) {
3918                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3919                 return -EINVAL;
3920         }
3921
3922         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3923                                 SECTOR_TO_BLOCK(zone_sectors))
3924                 return -EINVAL;
3925         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3926         FDEV(devi).nr_blkz = div_u64(SECTOR_TO_BLOCK(nr_sectors),
3927                                         sbi->blocks_per_blkz);
3928         if (nr_sectors & (zone_sectors - 1))
3929                 FDEV(devi).nr_blkz++;
3930
3931         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3932                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3933                                         * sizeof(unsigned long),
3934                                         GFP_KERNEL);
3935         if (!FDEV(devi).blkz_seq)
3936                 return -ENOMEM;
3937
3938         rep_zone_arg.sbi = sbi;
3939         rep_zone_arg.dev = &FDEV(devi);
3940
3941         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3942                                   &rep_zone_arg);
3943         if (ret < 0)
3944                 return ret;
3945         return 0;
3946 }
3947 #endif
3948
3949 /*
3950  * Read f2fs raw super block.
3951  * Because we have two copies of super block, so read both of them
3952  * to get the first valid one. If any one of them is broken, we pass
3953  * them recovery flag back to the caller.
3954  */
3955 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3956                         struct f2fs_super_block **raw_super,
3957                         int *valid_super_block, int *recovery)
3958 {
3959         struct super_block *sb = sbi->sb;
3960         int block;
3961         struct buffer_head *bh;
3962         struct f2fs_super_block *super;
3963         int err = 0;
3964
3965         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3966         if (!super)
3967                 return -ENOMEM;
3968
3969         for (block = 0; block < 2; block++) {
3970                 bh = sb_bread(sb, block);
3971                 if (!bh) {
3972                         f2fs_err(sbi, "Unable to read %dth superblock",
3973                                  block + 1);
3974                         err = -EIO;
3975                         *recovery = 1;
3976                         continue;
3977                 }
3978
3979                 /* sanity checking of raw super */
3980                 err = sanity_check_raw_super(sbi, bh);
3981                 if (err) {
3982                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3983                                  block + 1);
3984                         brelse(bh);
3985                         *recovery = 1;
3986                         continue;
3987                 }
3988
3989                 if (!*raw_super) {
3990                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3991                                                         sizeof(*super));
3992                         *valid_super_block = block;
3993                         *raw_super = super;
3994                 }
3995                 brelse(bh);
3996         }
3997
3998         /* No valid superblock */
3999         if (!*raw_super)
4000                 kfree(super);
4001         else
4002                 err = 0;
4003
4004         return err;
4005 }
4006
4007 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
4008 {
4009         struct buffer_head *bh;
4010         __u32 crc = 0;
4011         int err;
4012
4013         if ((recover && f2fs_readonly(sbi->sb)) ||
4014                                 f2fs_hw_is_readonly(sbi)) {
4015                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
4016                 return -EROFS;
4017         }
4018
4019         /* we should update superblock crc here */
4020         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
4021                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
4022                                 offsetof(struct f2fs_super_block, crc));
4023                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
4024         }
4025
4026         /* write back-up superblock first */
4027         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
4028         if (!bh)
4029                 return -EIO;
4030         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
4031         brelse(bh);
4032
4033         /* if we are in recovery path, skip writing valid superblock */
4034         if (recover || err)
4035                 return err;
4036
4037         /* write current valid superblock */
4038         bh = sb_bread(sbi->sb, sbi->valid_super_block);
4039         if (!bh)
4040                 return -EIO;
4041         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
4042         brelse(bh);
4043         return err;
4044 }
4045
4046 static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
4047 {
4048         unsigned long flags;
4049
4050         spin_lock_irqsave(&sbi->error_lock, flags);
4051         if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
4052                 sbi->stop_reason[reason]++;
4053         spin_unlock_irqrestore(&sbi->error_lock, flags);
4054 }
4055
4056 static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
4057 {
4058         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4059         unsigned long flags;
4060         int err;
4061
4062         f2fs_down_write(&sbi->sb_lock);
4063
4064         spin_lock_irqsave(&sbi->error_lock, flags);
4065         if (sbi->error_dirty) {
4066                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4067                                                         MAX_F2FS_ERRORS);
4068                 sbi->error_dirty = false;
4069         }
4070         memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
4071         spin_unlock_irqrestore(&sbi->error_lock, flags);
4072
4073         err = f2fs_commit_super(sbi, false);
4074
4075         f2fs_up_write(&sbi->sb_lock);
4076         if (err)
4077                 f2fs_err(sbi, "f2fs_commit_super fails to record err:%d", err);
4078 }
4079
4080 void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
4081 {
4082         unsigned long flags;
4083
4084         spin_lock_irqsave(&sbi->error_lock, flags);
4085         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
4086                 set_bit(flag, (unsigned long *)sbi->errors);
4087                 sbi->error_dirty = true;
4088         }
4089         spin_unlock_irqrestore(&sbi->error_lock, flags);
4090 }
4091
4092 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
4093 {
4094         unsigned long flags;
4095         bool need_update = false;
4096
4097         spin_lock_irqsave(&sbi->error_lock, flags);
4098         if (sbi->error_dirty) {
4099                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4100                                                         MAX_F2FS_ERRORS);
4101                 sbi->error_dirty = false;
4102                 need_update = true;
4103         }
4104         spin_unlock_irqrestore(&sbi->error_lock, flags);
4105
4106         return need_update;
4107 }
4108
4109 static void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error)
4110 {
4111         int err;
4112
4113         f2fs_down_write(&sbi->sb_lock);
4114
4115         if (!f2fs_update_errors(sbi))
4116                 goto out_unlock;
4117
4118         err = f2fs_commit_super(sbi, false);
4119         if (err)
4120                 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d",
4121                                                                 error, err);
4122 out_unlock:
4123         f2fs_up_write(&sbi->sb_lock);
4124 }
4125
4126 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
4127 {
4128         f2fs_save_errors(sbi, error);
4129         f2fs_record_errors(sbi, error);
4130 }
4131
4132 void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error)
4133 {
4134         f2fs_save_errors(sbi, error);
4135
4136         if (!sbi->error_dirty)
4137                 return;
4138         if (!test_bit(error, (unsigned long *)sbi->errors))
4139                 return;
4140         schedule_work(&sbi->s_error_work);
4141 }
4142
4143 static bool system_going_down(void)
4144 {
4145         return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
4146                 || system_state == SYSTEM_RESTART;
4147 }
4148
4149 void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
4150                                                         bool irq_context)
4151 {
4152         struct super_block *sb = sbi->sb;
4153         bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
4154         bool continue_fs = !shutdown &&
4155                         F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
4156
4157         set_ckpt_flags(sbi, CP_ERROR_FLAG);
4158
4159         if (!f2fs_hw_is_readonly(sbi)) {
4160                 save_stop_reason(sbi, reason);
4161
4162                 if (irq_context && !shutdown)
4163                         schedule_work(&sbi->s_error_work);
4164                 else
4165                         f2fs_record_stop_reason(sbi);
4166         }
4167
4168         /*
4169          * We force ERRORS_RO behavior when system is rebooting. Otherwise we
4170          * could panic during 'reboot -f' as the underlying device got already
4171          * disabled.
4172          */
4173         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
4174                                 !shutdown && !system_going_down() &&
4175                                 !is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN))
4176                 panic("F2FS-fs (device %s): panic forced after error\n",
4177                                                         sb->s_id);
4178
4179         if (shutdown)
4180                 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
4181
4182         /* continue filesystem operators if errors=continue */
4183         if (continue_fs || f2fs_readonly(sb))
4184                 return;
4185
4186         f2fs_warn(sbi, "Remounting filesystem read-only");
4187         /*
4188          * Make sure updated value of ->s_mount_flags will be visible before
4189          * ->s_flags update
4190          */
4191         smp_wmb();
4192         sb->s_flags |= SB_RDONLY;
4193 }
4194
4195 static void f2fs_record_error_work(struct work_struct *work)
4196 {
4197         struct f2fs_sb_info *sbi = container_of(work,
4198                                         struct f2fs_sb_info, s_error_work);
4199
4200         f2fs_record_stop_reason(sbi);
4201 }
4202
4203 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
4204 {
4205         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4206         unsigned int max_devices = MAX_DEVICES;
4207         unsigned int logical_blksize;
4208         blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
4209         int i;
4210
4211         /* Initialize single device information */
4212         if (!RDEV(0).path[0]) {
4213                 if (!bdev_is_zoned(sbi->sb->s_bdev))
4214                         return 0;
4215                 max_devices = 1;
4216         }
4217
4218         /*
4219          * Initialize multiple devices information, or single
4220          * zoned block device information.
4221          */
4222         sbi->devs = f2fs_kzalloc(sbi,
4223                                  array_size(max_devices,
4224                                             sizeof(struct f2fs_dev_info)),
4225                                  GFP_KERNEL);
4226         if (!sbi->devs)
4227                 return -ENOMEM;
4228
4229         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
4230         sbi->aligned_blksize = true;
4231
4232         for (i = 0; i < max_devices; i++) {
4233                 if (i == 0)
4234                         FDEV(0).bdev = sbi->sb->s_bdev;
4235                 else if (!RDEV(i).path[0])
4236                         break;
4237
4238                 if (max_devices > 1) {
4239                         /* Multi-device mount */
4240                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
4241                         FDEV(i).total_segments =
4242                                 le32_to_cpu(RDEV(i).total_segments);
4243                         if (i == 0) {
4244                                 FDEV(i).start_blk = 0;
4245                                 FDEV(i).end_blk = FDEV(i).start_blk +
4246                                     (FDEV(i).total_segments <<
4247                                     sbi->log_blocks_per_seg) - 1 +
4248                                     le32_to_cpu(raw_super->segment0_blkaddr);
4249                         } else {
4250                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
4251                                 FDEV(i).end_blk = FDEV(i).start_blk +
4252                                         (FDEV(i).total_segments <<
4253                                         sbi->log_blocks_per_seg) - 1;
4254                                 FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
4255                                         mode, sbi->sb, NULL);
4256                         }
4257                 }
4258                 if (IS_ERR(FDEV(i).bdev))
4259                         return PTR_ERR(FDEV(i).bdev);
4260
4261                 /* to release errored devices */
4262                 sbi->s_ndevs = i + 1;
4263
4264                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4265                         sbi->aligned_blksize = false;
4266
4267 #ifdef CONFIG_BLK_DEV_ZONED
4268                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
4269                                 !f2fs_sb_has_blkzoned(sbi)) {
4270                         f2fs_err(sbi, "Zoned block device feature not enabled");
4271                         return -EINVAL;
4272                 }
4273                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
4274                         if (init_blkz_info(sbi, i)) {
4275                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
4276                                 return -EINVAL;
4277                         }
4278                         if (max_devices == 1)
4279                                 break;
4280                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
4281                                   i, FDEV(i).path,
4282                                   FDEV(i).total_segments,
4283                                   FDEV(i).start_blk, FDEV(i).end_blk,
4284                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
4285                                   "Host-aware" : "Host-managed");
4286                         continue;
4287                 }
4288 #endif
4289                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4290                           i, FDEV(i).path,
4291                           FDEV(i).total_segments,
4292                           FDEV(i).start_blk, FDEV(i).end_blk);
4293         }
4294         f2fs_info(sbi,
4295                   "IO Block Size: %8ld KB", F2FS_IO_SIZE_KB(sbi));
4296         return 0;
4297 }
4298
4299 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4300 {
4301 #if IS_ENABLED(CONFIG_UNICODE)
4302         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4303                 const struct f2fs_sb_encodings *encoding_info;
4304                 struct unicode_map *encoding;
4305                 __u16 encoding_flags;
4306
4307                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4308                 if (!encoding_info) {
4309                         f2fs_err(sbi,
4310                                  "Encoding requested by superblock is unknown");
4311                         return -EINVAL;
4312                 }
4313
4314                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4315                 encoding = utf8_load(encoding_info->version);
4316                 if (IS_ERR(encoding)) {
4317                         f2fs_err(sbi,
4318                                  "can't mount with superblock charset: %s-%u.%u.%u "
4319                                  "not supported by the kernel. flags: 0x%x.",
4320                                  encoding_info->name,
4321                                  unicode_major(encoding_info->version),
4322                                  unicode_minor(encoding_info->version),
4323                                  unicode_rev(encoding_info->version),
4324                                  encoding_flags);
4325                         return PTR_ERR(encoding);
4326                 }
4327                 f2fs_info(sbi, "Using encoding defined by superblock: "
4328                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4329                          unicode_major(encoding_info->version),
4330                          unicode_minor(encoding_info->version),
4331                          unicode_rev(encoding_info->version),
4332                          encoding_flags);
4333
4334                 sbi->sb->s_encoding = encoding;
4335                 sbi->sb->s_encoding_flags = encoding_flags;
4336         }
4337 #else
4338         if (f2fs_sb_has_casefold(sbi)) {
4339                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4340                 return -EINVAL;
4341         }
4342 #endif
4343         return 0;
4344 }
4345
4346 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4347 {
4348         /* adjust parameters according to the volume size */
4349         if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4350                 if (f2fs_block_unit_discard(sbi))
4351                         SM_I(sbi)->dcc_info->discard_granularity =
4352                                                 MIN_DISCARD_GRANULARITY;
4353                 if (!f2fs_lfs_mode(sbi))
4354                         SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4355                                                 BIT(F2FS_IPU_HONOR_OPU_WRITE);
4356         }
4357
4358         sbi->readdir_ra = true;
4359 }
4360
4361 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4362 {
4363         struct f2fs_sb_info *sbi;
4364         struct f2fs_super_block *raw_super;
4365         struct inode *root;
4366         int err;
4367         bool skip_recovery = false, need_fsck = false;
4368         char *options = NULL;
4369         int recovery, i, valid_super_block;
4370         struct curseg_info *seg_i;
4371         int retry_cnt = 1;
4372 #ifdef CONFIG_QUOTA
4373         bool quota_enabled = false;
4374 #endif
4375
4376 try_onemore:
4377         err = -EINVAL;
4378         raw_super = NULL;
4379         valid_super_block = -1;
4380         recovery = 0;
4381
4382         /* allocate memory for f2fs-specific super block info */
4383         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4384         if (!sbi)
4385                 return -ENOMEM;
4386
4387         sbi->sb = sb;
4388
4389         /* initialize locks within allocated memory */
4390         init_f2fs_rwsem(&sbi->gc_lock);
4391         mutex_init(&sbi->writepages);
4392         init_f2fs_rwsem(&sbi->cp_global_sem);
4393         init_f2fs_rwsem(&sbi->node_write);
4394         init_f2fs_rwsem(&sbi->node_change);
4395         spin_lock_init(&sbi->stat_lock);
4396         init_f2fs_rwsem(&sbi->cp_rwsem);
4397         init_f2fs_rwsem(&sbi->quota_sem);
4398         init_waitqueue_head(&sbi->cp_wait);
4399         spin_lock_init(&sbi->error_lock);
4400
4401         for (i = 0; i < NR_INODE_TYPE; i++) {
4402                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4403                 spin_lock_init(&sbi->inode_lock[i]);
4404         }
4405         mutex_init(&sbi->flush_lock);
4406
4407         /* Load the checksum driver */
4408         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4409         if (IS_ERR(sbi->s_chksum_driver)) {
4410                 f2fs_err(sbi, "Cannot load crc32 driver.");
4411                 err = PTR_ERR(sbi->s_chksum_driver);
4412                 sbi->s_chksum_driver = NULL;
4413                 goto free_sbi;
4414         }
4415
4416         /* set a block size */
4417         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4418                 f2fs_err(sbi, "unable to set blocksize");
4419                 goto free_sbi;
4420         }
4421
4422         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4423                                                                 &recovery);
4424         if (err)
4425                 goto free_sbi;
4426
4427         sb->s_fs_info = sbi;
4428         sbi->raw_super = raw_super;
4429
4430         INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
4431         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4432         memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
4433
4434         /* precompute checksum seed for metadata */
4435         if (f2fs_sb_has_inode_chksum(sbi))
4436                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4437                                                 sizeof(raw_super->uuid));
4438
4439         default_options(sbi, false);
4440         /* parse mount options */
4441         options = kstrdup((const char *)data, GFP_KERNEL);
4442         if (data && !options) {
4443                 err = -ENOMEM;
4444                 goto free_sb_buf;
4445         }
4446
4447         err = parse_options(sb, options, false);
4448         if (err)
4449                 goto free_options;
4450
4451         sb->s_maxbytes = max_file_blocks(NULL) <<
4452                                 le32_to_cpu(raw_super->log_blocksize);
4453         sb->s_max_links = F2FS_LINK_MAX;
4454
4455         err = f2fs_setup_casefold(sbi);
4456         if (err)
4457                 goto free_options;
4458
4459 #ifdef CONFIG_QUOTA
4460         sb->dq_op = &f2fs_quota_operations;
4461         sb->s_qcop = &f2fs_quotactl_ops;
4462         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4463
4464         if (f2fs_sb_has_quota_ino(sbi)) {
4465                 for (i = 0; i < MAXQUOTAS; i++) {
4466                         if (f2fs_qf_ino(sbi->sb, i))
4467                                 sbi->nquota_files++;
4468                 }
4469         }
4470 #endif
4471
4472         sb->s_op = &f2fs_sops;
4473 #ifdef CONFIG_FS_ENCRYPTION
4474         sb->s_cop = &f2fs_cryptops;
4475 #endif
4476 #ifdef CONFIG_FS_VERITY
4477         sb->s_vop = &f2fs_verityops;
4478 #endif
4479         sb->s_xattr = f2fs_xattr_handlers;
4480         sb->s_export_op = &f2fs_export_ops;
4481         sb->s_magic = F2FS_SUPER_MAGIC;
4482         sb->s_time_gran = 1;
4483         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4484                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4485         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4486         sb->s_iflags |= SB_I_CGROUPWB;
4487
4488         /* init f2fs-specific super block info */
4489         sbi->valid_super_block = valid_super_block;
4490
4491         /* disallow all the data/node/meta page writes */
4492         set_sbi_flag(sbi, SBI_POR_DOING);
4493
4494         err = f2fs_init_write_merge_io(sbi);
4495         if (err)
4496                 goto free_bio_info;
4497
4498         init_sb_info(sbi);
4499
4500         err = f2fs_init_iostat(sbi);
4501         if (err)
4502                 goto free_bio_info;
4503
4504         err = init_percpu_info(sbi);
4505         if (err)
4506                 goto free_iostat;
4507
4508         if (F2FS_IO_ALIGNED(sbi)) {
4509                 sbi->write_io_dummy =
4510                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4511                 if (!sbi->write_io_dummy) {
4512                         err = -ENOMEM;
4513                         goto free_percpu;
4514                 }
4515         }
4516
4517         /* init per sbi slab cache */
4518         err = f2fs_init_xattr_caches(sbi);
4519         if (err)
4520                 goto free_io_dummy;
4521         err = f2fs_init_page_array_cache(sbi);
4522         if (err)
4523                 goto free_xattr_cache;
4524
4525         /* get an inode for meta space */
4526         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4527         if (IS_ERR(sbi->meta_inode)) {
4528                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4529                 err = PTR_ERR(sbi->meta_inode);
4530                 goto free_page_array_cache;
4531         }
4532
4533         err = f2fs_get_valid_checkpoint(sbi);
4534         if (err) {
4535                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4536                 goto free_meta_inode;
4537         }
4538
4539         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4540                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4541         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4542                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4543                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4544         }
4545
4546         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4547                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4548
4549         /* Initialize device list */
4550         err = f2fs_scan_devices(sbi);
4551         if (err) {
4552                 f2fs_err(sbi, "Failed to find devices");
4553                 goto free_devices;
4554         }
4555
4556         err = f2fs_init_post_read_wq(sbi);
4557         if (err) {
4558                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4559                 goto free_devices;
4560         }
4561
4562         sbi->total_valid_node_count =
4563                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4564         percpu_counter_set(&sbi->total_valid_inode_count,
4565                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4566         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4567         sbi->total_valid_block_count =
4568                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4569         sbi->last_valid_block_count = sbi->total_valid_block_count;
4570         sbi->reserved_blocks = 0;
4571         sbi->current_reserved_blocks = 0;
4572         limit_reserve_root(sbi);
4573         adjust_unusable_cap_perc(sbi);
4574
4575         f2fs_init_extent_cache_info(sbi);
4576
4577         f2fs_init_ino_entry_info(sbi);
4578
4579         f2fs_init_fsync_node_info(sbi);
4580
4581         /* setup checkpoint request control and start checkpoint issue thread */
4582         f2fs_init_ckpt_req_control(sbi);
4583         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4584                         test_opt(sbi, MERGE_CHECKPOINT)) {
4585                 err = f2fs_start_ckpt_thread(sbi);
4586                 if (err) {
4587                         f2fs_err(sbi,
4588                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4589                             err);
4590                         goto stop_ckpt_thread;
4591                 }
4592         }
4593
4594         /* setup f2fs internal modules */
4595         err = f2fs_build_segment_manager(sbi);
4596         if (err) {
4597                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4598                          err);
4599                 goto free_sm;
4600         }
4601         err = f2fs_build_node_manager(sbi);
4602         if (err) {
4603                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4604                          err);
4605                 goto free_nm;
4606         }
4607
4608         err = adjust_reserved_segment(sbi);
4609         if (err)
4610                 goto free_nm;
4611
4612         /* For write statistics */
4613         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4614
4615         /* Read accumulated write IO statistics if exists */
4616         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4617         if (__exist_node_summaries(sbi))
4618                 sbi->kbytes_written =
4619                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4620
4621         f2fs_build_gc_manager(sbi);
4622
4623         err = f2fs_build_stats(sbi);
4624         if (err)
4625                 goto free_nm;
4626
4627         /* get an inode for node space */
4628         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4629         if (IS_ERR(sbi->node_inode)) {
4630                 f2fs_err(sbi, "Failed to read node inode");
4631                 err = PTR_ERR(sbi->node_inode);
4632                 goto free_stats;
4633         }
4634
4635         /* read root inode and dentry */
4636         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4637         if (IS_ERR(root)) {
4638                 f2fs_err(sbi, "Failed to read root inode");
4639                 err = PTR_ERR(root);
4640                 goto free_node_inode;
4641         }
4642         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4643                         !root->i_size || !root->i_nlink) {
4644                 iput(root);
4645                 err = -EINVAL;
4646                 goto free_node_inode;
4647         }
4648
4649         sb->s_root = d_make_root(root); /* allocate root dentry */
4650         if (!sb->s_root) {
4651                 err = -ENOMEM;
4652                 goto free_node_inode;
4653         }
4654
4655         err = f2fs_init_compress_inode(sbi);
4656         if (err)
4657                 goto free_root_inode;
4658
4659         err = f2fs_register_sysfs(sbi);
4660         if (err)
4661                 goto free_compress_inode;
4662
4663 #ifdef CONFIG_QUOTA
4664         /* Enable quota usage during mount */
4665         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4666                 err = f2fs_enable_quotas(sb);
4667                 if (err)
4668                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4669         }
4670
4671         quota_enabled = f2fs_recover_quota_begin(sbi);
4672 #endif
4673         /* if there are any orphan inodes, free them */
4674         err = f2fs_recover_orphan_inodes(sbi);
4675         if (err)
4676                 goto free_meta;
4677
4678         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4679                 goto reset_checkpoint;
4680
4681         /* recover fsynced data */
4682         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4683                         !test_opt(sbi, NORECOVERY)) {
4684                 /*
4685                  * mount should be failed, when device has readonly mode, and
4686                  * previous checkpoint was not done by clean system shutdown.
4687                  */
4688                 if (f2fs_hw_is_readonly(sbi)) {
4689                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4690                                 err = f2fs_recover_fsync_data(sbi, true);
4691                                 if (err > 0) {
4692                                         err = -EROFS;
4693                                         f2fs_err(sbi, "Need to recover fsync data, but "
4694                                                 "write access unavailable, please try "
4695                                                 "mount w/ disable_roll_forward or norecovery");
4696                                 }
4697                                 if (err < 0)
4698                                         goto free_meta;
4699                         }
4700                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4701                         goto reset_checkpoint;
4702                 }
4703
4704                 if (need_fsck)
4705                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4706
4707                 if (skip_recovery)
4708                         goto reset_checkpoint;
4709
4710                 err = f2fs_recover_fsync_data(sbi, false);
4711                 if (err < 0) {
4712                         if (err != -ENOMEM)
4713                                 skip_recovery = true;
4714                         need_fsck = true;
4715                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4716                                  err);
4717                         goto free_meta;
4718                 }
4719         } else {
4720                 err = f2fs_recover_fsync_data(sbi, true);
4721
4722                 if (!f2fs_readonly(sb) && err > 0) {
4723                         err = -EINVAL;
4724                         f2fs_err(sbi, "Need to recover fsync data");
4725                         goto free_meta;
4726                 }
4727         }
4728
4729 #ifdef CONFIG_QUOTA
4730         f2fs_recover_quota_end(sbi, quota_enabled);
4731 #endif
4732
4733         /*
4734          * If the f2fs is not readonly and fsync data recovery succeeds,
4735          * check zoned block devices' write pointer consistency.
4736          */
4737         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4738                 err = f2fs_check_write_pointer(sbi);
4739                 if (err)
4740                         goto free_meta;
4741         }
4742
4743 reset_checkpoint:
4744         f2fs_init_inmem_curseg(sbi);
4745
4746         /* f2fs_recover_fsync_data() cleared this already */
4747         clear_sbi_flag(sbi, SBI_POR_DOING);
4748
4749         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4750                 err = f2fs_disable_checkpoint(sbi);
4751                 if (err)
4752                         goto sync_free_meta;
4753         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4754                 f2fs_enable_checkpoint(sbi);
4755         }
4756
4757         /*
4758          * If filesystem is not mounted as read-only then
4759          * do start the gc_thread.
4760          */
4761         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4762                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4763                 /* After POR, we can run background GC thread.*/
4764                 err = f2fs_start_gc_thread(sbi);
4765                 if (err)
4766                         goto sync_free_meta;
4767         }
4768         kvfree(options);
4769
4770         /* recover broken superblock */
4771         if (recovery) {
4772                 err = f2fs_commit_super(sbi, true);
4773                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4774                           sbi->valid_super_block ? 1 : 2, err);
4775         }
4776
4777         f2fs_join_shrinker(sbi);
4778
4779         f2fs_tuning_parameters(sbi);
4780
4781         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4782                     cur_cp_version(F2FS_CKPT(sbi)));
4783         f2fs_update_time(sbi, CP_TIME);
4784         f2fs_update_time(sbi, REQ_TIME);
4785         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4786         return 0;
4787
4788 sync_free_meta:
4789         /* safe to flush all the data */
4790         sync_filesystem(sbi->sb);
4791         retry_cnt = 0;
4792
4793 free_meta:
4794 #ifdef CONFIG_QUOTA
4795         f2fs_truncate_quota_inode_pages(sb);
4796         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4797                 f2fs_quota_off_umount(sbi->sb);
4798 #endif
4799         /*
4800          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4801          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4802          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4803          * falls into an infinite loop in f2fs_sync_meta_pages().
4804          */
4805         truncate_inode_pages_final(META_MAPPING(sbi));
4806         /* evict some inodes being cached by GC */
4807         evict_inodes(sb);
4808         f2fs_unregister_sysfs(sbi);
4809 free_compress_inode:
4810         f2fs_destroy_compress_inode(sbi);
4811 free_root_inode:
4812         dput(sb->s_root);
4813         sb->s_root = NULL;
4814 free_node_inode:
4815         f2fs_release_ino_entry(sbi, true);
4816         truncate_inode_pages_final(NODE_MAPPING(sbi));
4817         iput(sbi->node_inode);
4818         sbi->node_inode = NULL;
4819 free_stats:
4820         f2fs_destroy_stats(sbi);
4821 free_nm:
4822         /* stop discard thread before destroying node manager */
4823         f2fs_stop_discard_thread(sbi);
4824         f2fs_destroy_node_manager(sbi);
4825 free_sm:
4826         f2fs_destroy_segment_manager(sbi);
4827 stop_ckpt_thread:
4828         f2fs_stop_ckpt_thread(sbi);
4829         /* flush s_error_work before sbi destroy */
4830         flush_work(&sbi->s_error_work);
4831         f2fs_destroy_post_read_wq(sbi);
4832 free_devices:
4833         destroy_device_list(sbi);
4834         kvfree(sbi->ckpt);
4835 free_meta_inode:
4836         make_bad_inode(sbi->meta_inode);
4837         iput(sbi->meta_inode);
4838         sbi->meta_inode = NULL;
4839 free_page_array_cache:
4840         f2fs_destroy_page_array_cache(sbi);
4841 free_xattr_cache:
4842         f2fs_destroy_xattr_caches(sbi);
4843 free_io_dummy:
4844         mempool_destroy(sbi->write_io_dummy);
4845 free_percpu:
4846         destroy_percpu_info(sbi);
4847 free_iostat:
4848         f2fs_destroy_iostat(sbi);
4849 free_bio_info:
4850         for (i = 0; i < NR_PAGE_TYPE; i++)
4851                 kvfree(sbi->write_io[i]);
4852
4853 #if IS_ENABLED(CONFIG_UNICODE)
4854         utf8_unload(sb->s_encoding);
4855         sb->s_encoding = NULL;
4856 #endif
4857 free_options:
4858 #ifdef CONFIG_QUOTA
4859         for (i = 0; i < MAXQUOTAS; i++)
4860                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4861 #endif
4862         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4863         kvfree(options);
4864 free_sb_buf:
4865         kfree(raw_super);
4866 free_sbi:
4867         if (sbi->s_chksum_driver)
4868                 crypto_free_shash(sbi->s_chksum_driver);
4869         kfree(sbi);
4870
4871         /* give only one another chance */
4872         if (retry_cnt > 0 && skip_recovery) {
4873                 retry_cnt--;
4874                 shrink_dcache_sb(sb);
4875                 goto try_onemore;
4876         }
4877         return err;
4878 }
4879
4880 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4881                         const char *dev_name, void *data)
4882 {
4883         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4884 }
4885
4886 static void kill_f2fs_super(struct super_block *sb)
4887 {
4888         if (sb->s_root) {
4889                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4890
4891                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4892                 f2fs_stop_gc_thread(sbi);
4893                 f2fs_stop_discard_thread(sbi);
4894
4895 #ifdef CONFIG_F2FS_FS_COMPRESSION
4896                 /*
4897                  * latter evict_inode() can bypass checking and invalidating
4898                  * compress inode cache.
4899                  */
4900                 if (test_opt(sbi, COMPRESS_CACHE))
4901                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4902 #endif
4903
4904                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4905                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4906                         struct cp_control cpc = {
4907                                 .reason = CP_UMOUNT,
4908                         };
4909                         stat_inc_cp_call_count(sbi, TOTAL_CALL);
4910                         f2fs_write_checkpoint(sbi, &cpc);
4911                 }
4912
4913                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4914                         sb->s_flags &= ~SB_RDONLY;
4915         }
4916         kill_block_super(sb);
4917 }
4918
4919 static struct file_system_type f2fs_fs_type = {
4920         .owner          = THIS_MODULE,
4921         .name           = "f2fs",
4922         .mount          = f2fs_mount,
4923         .kill_sb        = kill_f2fs_super,
4924         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4925 };
4926 MODULE_ALIAS_FS("f2fs");
4927
4928 static int __init init_inodecache(void)
4929 {
4930         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4931                         sizeof(struct f2fs_inode_info), 0,
4932                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4933         return f2fs_inode_cachep ? 0 : -ENOMEM;
4934 }
4935
4936 static void destroy_inodecache(void)
4937 {
4938         /*
4939          * Make sure all delayed rcu free inodes are flushed before we
4940          * destroy cache.
4941          */
4942         rcu_barrier();
4943         kmem_cache_destroy(f2fs_inode_cachep);
4944 }
4945
4946 static int __init init_f2fs_fs(void)
4947 {
4948         int err;
4949
4950         if (PAGE_SIZE != F2FS_BLKSIZE) {
4951                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4952                                 PAGE_SIZE, F2FS_BLKSIZE);
4953                 return -EINVAL;
4954         }
4955
4956         err = init_inodecache();
4957         if (err)
4958                 goto fail;
4959         err = f2fs_create_node_manager_caches();
4960         if (err)
4961                 goto free_inodecache;
4962         err = f2fs_create_segment_manager_caches();
4963         if (err)
4964                 goto free_node_manager_caches;
4965         err = f2fs_create_checkpoint_caches();
4966         if (err)
4967                 goto free_segment_manager_caches;
4968         err = f2fs_create_recovery_cache();
4969         if (err)
4970                 goto free_checkpoint_caches;
4971         err = f2fs_create_extent_cache();
4972         if (err)
4973                 goto free_recovery_cache;
4974         err = f2fs_create_garbage_collection_cache();
4975         if (err)
4976                 goto free_extent_cache;
4977         err = f2fs_init_sysfs();
4978         if (err)
4979                 goto free_garbage_collection_cache;
4980         err = register_shrinker(&f2fs_shrinker_info, "f2fs-shrinker");
4981         if (err)
4982                 goto free_sysfs;
4983         err = register_filesystem(&f2fs_fs_type);
4984         if (err)
4985                 goto free_shrinker;
4986         f2fs_create_root_stats();
4987         err = f2fs_init_post_read_processing();
4988         if (err)
4989                 goto free_root_stats;
4990         err = f2fs_init_iostat_processing();
4991         if (err)
4992                 goto free_post_read;
4993         err = f2fs_init_bio_entry_cache();
4994         if (err)
4995                 goto free_iostat;
4996         err = f2fs_init_bioset();
4997         if (err)
4998                 goto free_bio_entry_cache;
4999         err = f2fs_init_compress_mempool();
5000         if (err)
5001                 goto free_bioset;
5002         err = f2fs_init_compress_cache();
5003         if (err)
5004                 goto free_compress_mempool;
5005         err = f2fs_create_casefold_cache();
5006         if (err)
5007                 goto free_compress_cache;
5008         return 0;
5009 free_compress_cache:
5010         f2fs_destroy_compress_cache();
5011 free_compress_mempool:
5012         f2fs_destroy_compress_mempool();
5013 free_bioset:
5014         f2fs_destroy_bioset();
5015 free_bio_entry_cache:
5016         f2fs_destroy_bio_entry_cache();
5017 free_iostat:
5018         f2fs_destroy_iostat_processing();
5019 free_post_read:
5020         f2fs_destroy_post_read_processing();
5021 free_root_stats:
5022         f2fs_destroy_root_stats();
5023         unregister_filesystem(&f2fs_fs_type);
5024 free_shrinker:
5025         unregister_shrinker(&f2fs_shrinker_info);
5026 free_sysfs:
5027         f2fs_exit_sysfs();
5028 free_garbage_collection_cache:
5029         f2fs_destroy_garbage_collection_cache();
5030 free_extent_cache:
5031         f2fs_destroy_extent_cache();
5032 free_recovery_cache:
5033         f2fs_destroy_recovery_cache();
5034 free_checkpoint_caches:
5035         f2fs_destroy_checkpoint_caches();
5036 free_segment_manager_caches:
5037         f2fs_destroy_segment_manager_caches();
5038 free_node_manager_caches:
5039         f2fs_destroy_node_manager_caches();
5040 free_inodecache:
5041         destroy_inodecache();
5042 fail:
5043         return err;
5044 }
5045
5046 static void __exit exit_f2fs_fs(void)
5047 {
5048         f2fs_destroy_casefold_cache();
5049         f2fs_destroy_compress_cache();
5050         f2fs_destroy_compress_mempool();
5051         f2fs_destroy_bioset();
5052         f2fs_destroy_bio_entry_cache();
5053         f2fs_destroy_iostat_processing();
5054         f2fs_destroy_post_read_processing();
5055         f2fs_destroy_root_stats();
5056         unregister_filesystem(&f2fs_fs_type);
5057         unregister_shrinker(&f2fs_shrinker_info);
5058         f2fs_exit_sysfs();
5059         f2fs_destroy_garbage_collection_cache();
5060         f2fs_destroy_extent_cache();
5061         f2fs_destroy_recovery_cache();
5062         f2fs_destroy_checkpoint_caches();
5063         f2fs_destroy_segment_manager_caches();
5064         f2fs_destroy_node_manager_caches();
5065         destroy_inodecache();
5066 }
5067
5068 module_init(init_f2fs_fs)
5069 module_exit(exit_f2fs_fs)
5070
5071 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
5072 MODULE_DESCRIPTION("Flash Friendly File System");
5073 MODULE_LICENSE("GPL");
5074 MODULE_SOFTDEP("pre: crc32");
5075