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/kthread.h>
  15 #include <linux/parser.h>
  16 #include <linux/mount.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/random.h>
  20 #include <linux/exportfs.h>
  21 #include <linux/blkdev.h>
  22 #include <linux/quotaops.h>
  23 #include <linux/f2fs_fs.h>
  24 #include <linux/sysfs.h>
  25 #include <linux/quota.h>
  26 #include <linux/unicode.h>
  27 #include <linux/part_stat.h>
  28 #include <linux/zstd.h>
  29 #include <linux/lz4.h>
  30
  31 #include "f2fs.h"
  32 #include "node.h"
  33 #include "segment.h"
  34 #include "xattr.h"
  35 #include "gc.h"
  36 #include "iostat.h"
  37
  38 #define CREATE_TRACE_POINTS
  39 #include <trace/events/f2fs.h>
  40
  41 static struct kmem_cache *f2fs_inode_cachep;
  42
  43 #ifdef CONFIG_F2FS_FAULT_INJECTION
  44
  45 const char *f2fs_fault_name[FAULT_MAX] = {
  46         [FAULT_KMALLOC]                 = "kmalloc",
  47         [FAULT_KVMALLOC]                = "kvmalloc",
  48         [FAULT_PAGE_ALLOC]              = "page alloc",
  49         [FAULT_PAGE_GET]                = "page get",
  50         [FAULT_ALLOC_NID]               = "alloc nid",
  51         [FAULT_ORPHAN]                  = "orphan",
  52         [FAULT_BLOCK]                   = "no more block",
  53         [FAULT_DIR_DEPTH]               = "too big dir depth",
  54         [FAULT_EVICT_INODE]             = "evict_inode fail",
  55         [FAULT_TRUNCATE]                = "truncate fail",
  56         [FAULT_READ_IO]                 = "read IO error",
  57         [FAULT_CHECKPOINT]              = "checkpoint error",
  58         [FAULT_DISCARD]                 = "discard error",
  59         [FAULT_WRITE_IO]                = "write IO error",
  60         [FAULT_SLAB_ALLOC]              = "slab alloc",
  61         [FAULT_DQUOT_INIT]              = "dquot initialize",
  62         [FAULT_LOCK_OP]                 = "lock_op",
  63         [FAULT_BLKADDR_VALIDITY]        = "invalid blkaddr",
  64         [FAULT_BLKADDR_CONSISTENCE]     = "inconsistent blkaddr",
  65         [FAULT_NO_SEGMENT]              = "no free segment",
  66 };
  67
  68 int f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned long rate,
  69                                                         unsigned long type)
  70 {
  71         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  72
  73         if (rate) {
  74                 if (rate > INT_MAX)
  75                         return -EINVAL;
  76                 atomic_set(&ffi->inject_ops, 0);
  77                 ffi->inject_rate = (int)rate;
  78         }
  79
  80         if (type) {
  81                 if (type >= BIT(FAULT_MAX))
  82                         return -EINVAL;
  83                 ffi->inject_type = (unsigned int)type;
  84         }
  85
  86         if (!rate && !type)
  87                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  88         else
  89                 f2fs_info(sbi,
  90                         "build fault injection attr: rate: %lu, type: 0x%lx",
  91                                                                 rate, type);
  92         return 0;
  93 }
  94 #endif
  95
  96 /* f2fs-wide shrinker description */
  97 static struct shrinker *f2fs_shrinker_info;
  98
  99 static int __init f2fs_init_shrinker(void)
 100 {
 101         f2fs_shrinker_info = shrinker_alloc(0, "f2fs-shrinker");
 102         if (!f2fs_shrinker_info)
 103                 return -ENOMEM;
 104
 105         f2fs_shrinker_info->count_objects = f2fs_shrink_count;
 106         f2fs_shrinker_info->scan_objects = f2fs_shrink_scan;
 107
 108         shrinker_register(f2fs_shrinker_info);
 109
 110         return 0;
 111 }
 112
 113 static void f2fs_exit_shrinker(void)
 114 {
 115         shrinker_free(f2fs_shrinker_info);
 116 }
 117
 118 enum {
 119         Opt_gc_background,
 120         Opt_disable_roll_forward,
 121         Opt_norecovery,
 122         Opt_discard,
 123         Opt_nodiscard,
 124         Opt_noheap,
 125         Opt_heap,
 126         Opt_user_xattr,
 127         Opt_nouser_xattr,
 128         Opt_acl,
 129         Opt_noacl,
 130         Opt_active_logs,
 131         Opt_disable_ext_identify,
 132         Opt_inline_xattr,
 133         Opt_noinline_xattr,
 134         Opt_inline_xattr_size,
 135         Opt_inline_data,
 136         Opt_inline_dentry,
 137         Opt_noinline_dentry,
 138         Opt_flush_merge,
 139         Opt_noflush_merge,
 140         Opt_barrier,
 141         Opt_nobarrier,
 142         Opt_fastboot,
 143         Opt_extent_cache,
 144         Opt_noextent_cache,
 145         Opt_noinline_data,
 146         Opt_data_flush,
 147         Opt_reserve_root,
 148         Opt_resgid,
 149         Opt_resuid,
 150         Opt_mode,
 151         Opt_fault_injection,
 152         Opt_fault_type,
 153         Opt_lazytime,
 154         Opt_nolazytime,
 155         Opt_quota,
 156         Opt_noquota,
 157         Opt_usrquota,
 158         Opt_grpquota,
 159         Opt_prjquota,
 160         Opt_usrjquota,
 161         Opt_grpjquota,
 162         Opt_prjjquota,
 163         Opt_offusrjquota,
 164         Opt_offgrpjquota,
 165         Opt_offprjjquota,
 166         Opt_jqfmt_vfsold,
 167         Opt_jqfmt_vfsv0,
 168         Opt_jqfmt_vfsv1,
 169         Opt_alloc,
 170         Opt_fsync,
 171         Opt_test_dummy_encryption,
 172         Opt_inlinecrypt,
 173         Opt_checkpoint_disable,
 174         Opt_checkpoint_disable_cap,
 175         Opt_checkpoint_disable_cap_perc,
 176         Opt_checkpoint_enable,
 177         Opt_checkpoint_merge,
 178         Opt_nocheckpoint_merge,
 179         Opt_compress_algorithm,
 180         Opt_compress_log_size,
 181         Opt_compress_extension,
 182         Opt_nocompress_extension,
 183         Opt_compress_chksum,
 184         Opt_compress_mode,
 185         Opt_compress_cache,
 186         Opt_atgc,
 187         Opt_gc_merge,
 188         Opt_nogc_merge,
 189         Opt_discard_unit,
 190         Opt_memory_mode,
 191         Opt_age_extent_cache,
 192         Opt_errors,
 193         Opt_err,
 194 };
 195
 196 static match_table_t f2fs_tokens = {
 197         {Opt_gc_background, "background_gc=%s"},
 198         {Opt_disable_roll_forward, "disable_roll_forward"},
 199         {Opt_norecovery, "norecovery"},
 200         {Opt_discard, "discard"},
 201         {Opt_nodiscard, "nodiscard"},
 202         {Opt_noheap, "no_heap"},
 203         {Opt_heap, "heap"},
 204         {Opt_user_xattr, "user_xattr"},
 205         {Opt_nouser_xattr, "nouser_xattr"},
 206         {Opt_acl, "acl"},
 207         {Opt_noacl, "noacl"},
 208         {Opt_active_logs, "active_logs=%u"},
 209         {Opt_disable_ext_identify, "disable_ext_identify"},
 210         {Opt_inline_xattr, "inline_xattr"},
 211         {Opt_noinline_xattr, "noinline_xattr"},
 212         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 213         {Opt_inline_data, "inline_data"},
 214         {Opt_inline_dentry, "inline_dentry"},
 215         {Opt_noinline_dentry, "noinline_dentry"},
 216         {Opt_flush_merge, "flush_merge"},
 217         {Opt_noflush_merge, "noflush_merge"},
 218         {Opt_barrier, "barrier"},
 219         {Opt_nobarrier, "nobarrier"},
 220         {Opt_fastboot, "fastboot"},
 221         {Opt_extent_cache, "extent_cache"},
 222         {Opt_noextent_cache, "noextent_cache"},
 223         {Opt_noinline_data, "noinline_data"},
 224         {Opt_data_flush, "data_flush"},
 225         {Opt_reserve_root, "reserve_root=%u"},
 226         {Opt_resgid, "resgid=%u"},
 227         {Opt_resuid, "resuid=%u"},
 228         {Opt_mode, "mode=%s"},
 229         {Opt_fault_injection, "fault_injection=%u"},
 230         {Opt_fault_type, "fault_type=%u"},
 231         {Opt_lazytime, "lazytime"},
 232         {Opt_nolazytime, "nolazytime"},
 233         {Opt_quota, "quota"},
 234         {Opt_noquota, "noquota"},
 235         {Opt_usrquota, "usrquota"},
 236         {Opt_grpquota, "grpquota"},
 237         {Opt_prjquota, "prjquota"},
 238         {Opt_usrjquota, "usrjquota=%s"},
 239         {Opt_grpjquota, "grpjquota=%s"},
 240         {Opt_prjjquota, "prjjquota=%s"},
 241         {Opt_offusrjquota, "usrjquota="},
 242         {Opt_offgrpjquota, "grpjquota="},
 243         {Opt_offprjjquota, "prjjquota="},
 244         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 245         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 246         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 247         {Opt_alloc, "alloc_mode=%s"},
 248         {Opt_fsync, "fsync_mode=%s"},
 249         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 250         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 251         {Opt_inlinecrypt, "inlinecrypt"},
 252         {Opt_checkpoint_disable, "checkpoint=disable"},
 253         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 254         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 255         {Opt_checkpoint_enable, "checkpoint=enable"},
 256         {Opt_checkpoint_merge, "checkpoint_merge"},
 257         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 258         {Opt_compress_algorithm, "compress_algorithm=%s"},
 259         {Opt_compress_log_size, "compress_log_size=%u"},
 260         {Opt_compress_extension, "compress_extension=%s"},
 261         {Opt_nocompress_extension, "nocompress_extension=%s"},
 262         {Opt_compress_chksum, "compress_chksum"},
 263         {Opt_compress_mode, "compress_mode=%s"},
 264         {Opt_compress_cache, "compress_cache"},
 265         {Opt_atgc, "atgc"},
 266         {Opt_gc_merge, "gc_merge"},
 267         {Opt_nogc_merge, "nogc_merge"},
 268         {Opt_discard_unit, "discard_unit=%s"},
 269         {Opt_memory_mode, "memory=%s"},
 270         {Opt_age_extent_cache, "age_extent_cache"},
 271         {Opt_errors, "errors=%s"},
 272         {Opt_err, NULL},
 273 };
 274
 275 void f2fs_printk(struct f2fs_sb_info *sbi, bool limit_rate,
 276                                                 const char *fmt, ...)
 277 {
 278         struct va_format vaf;
 279         va_list args;
 280         int level;
 281
 282         va_start(args, fmt);
 283
 284         level = printk_get_level(fmt);
 285         vaf.fmt = printk_skip_level(fmt);
 286         vaf.va = &args;
 287         if (limit_rate)
 288                 printk_ratelimited("%c%cF2FS-fs (%s): %pV\n",
 289                         KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 290         else
 291                 printk("%c%cF2FS-fs (%s): %pV\n",
 292                         KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 293
 294         va_end(args);
 295 }
 296
 297 #if IS_ENABLED(CONFIG_UNICODE)
 298 static const struct f2fs_sb_encodings {
 299         __u16 magic;
 300         char *name;
 301         unsigned int version;
 302 } f2fs_sb_encoding_map[] = {
 303         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 304 };
 305
 306 static const struct f2fs_sb_encodings *
 307 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 308 {
 309         __u16 magic = le16_to_cpu(sb->s_encoding);
 310         int i;
 311
 312         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 313                 if (magic == f2fs_sb_encoding_map[i].magic)
 314                         return &f2fs_sb_encoding_map[i];
 315
 316         return NULL;
 317 }
 318
 319 struct kmem_cache *f2fs_cf_name_slab;
 320 static int __init f2fs_create_casefold_cache(void)
 321 {
 322         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 323                                                    F2FS_NAME_LEN);
 324         return f2fs_cf_name_slab ? 0 : -ENOMEM;
 325 }
 326
 327 static void f2fs_destroy_casefold_cache(void)
 328 {
 329         kmem_cache_destroy(f2fs_cf_name_slab);
 330 }
 331 #else
 332 static int __init f2fs_create_casefold_cache(void) { return 0; }
 333 static void f2fs_destroy_casefold_cache(void) { }
 334 #endif
 335
 336 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 337 {
 338         block_t limit = min((sbi->user_block_count >> 3),
 339                         sbi->user_block_count - sbi->reserved_blocks);
 340
 341         /* limit is 12.5% */
 342         if (test_opt(sbi, RESERVE_ROOT) &&
 343                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 344                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 345                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 346                           F2FS_OPTION(sbi).root_reserved_blocks);
 347         }
 348         if (!test_opt(sbi, RESERVE_ROOT) &&
 349                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 350                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 351                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 352                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 353                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 354                           from_kuid_munged(&init_user_ns,
 355                                            F2FS_OPTION(sbi).s_resuid),
 356                           from_kgid_munged(&init_user_ns,
 357                                            F2FS_OPTION(sbi).s_resgid));
 358 }
 359
 360 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 361 {
 362         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 363                 return;
 364
 365         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 366                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 367         else
 368                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 369                                         F2FS_OPTION(sbi).unusable_cap_perc;
 370
 371         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 372                         F2FS_OPTION(sbi).unusable_cap,
 373                         F2FS_OPTION(sbi).unusable_cap_perc);
 374 }
 375
 376 static void init_once(void *foo)
 377 {
 378         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 379
 380         inode_init_once(&fi->vfs_inode);
 381 }
 382
 383 #ifdef CONFIG_QUOTA
 384 static const char * const quotatypes[] = INITQFNAMES;
 385 #define QTYPE2NAME(t) (quotatypes[t])
 386 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 387                                                         substring_t *args)
 388 {
 389         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 390         char *qname;
 391         int ret = -EINVAL;
 392
 393         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 394                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 395                 return -EINVAL;
 396         }
 397         if (f2fs_sb_has_quota_ino(sbi)) {
 398                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 399                 return 0;
 400         }
 401
 402         qname = match_strdup(args);
 403         if (!qname) {
 404                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 405                 return -ENOMEM;
 406         }
 407         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 408                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 409                         ret = 0;
 410                 else
 411                         f2fs_err(sbi, "%s quota file already specified",
 412                                  QTYPE2NAME(qtype));
 413                 goto errout;
 414         }
 415         if (strchr(qname, '/')) {
 416                 f2fs_err(sbi, "quotafile must be on filesystem root");
 417                 goto errout;
 418         }
 419         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 420         set_opt(sbi, QUOTA);
 421         return 0;
 422 errout:
 423         kfree(qname);
 424         return ret;
 425 }
 426
 427 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 428 {
 429         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 430
 431         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 432                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 433                 return -EINVAL;
 434         }
 435         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 436         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 437         return 0;
 438 }
 439
 440 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 441 {
 442         /*
 443          * We do the test below only for project quotas. 'usrquota' and
 444          * 'grpquota' mount options are allowed even without quota feature
 445          * to support legacy quotas in quota files.
 446          */
 447         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 448                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 449                 return -1;
 450         }
 451         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 452                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 453                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 454                 if (test_opt(sbi, USRQUOTA) &&
 455                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 456                         clear_opt(sbi, USRQUOTA);
 457
 458                 if (test_opt(sbi, GRPQUOTA) &&
 459                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 460                         clear_opt(sbi, GRPQUOTA);
 461
 462                 if (test_opt(sbi, PRJQUOTA) &&
 463                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 464                         clear_opt(sbi, PRJQUOTA);
 465
 466                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 467                                 test_opt(sbi, PRJQUOTA)) {
 468                         f2fs_err(sbi, "old and new quota format mixing");
 469                         return -1;
 470                 }
 471
 472                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 473                         f2fs_err(sbi, "journaled quota format not specified");
 474                         return -1;
 475                 }
 476         }
 477
 478         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 479                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 480                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 481         }
 482         return 0;
 483 }
 484 #endif
 485
 486 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 487                                           const char *opt,
 488                                           const substring_t *arg,
 489                                           bool is_remount)
 490 {
 491         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 492         struct fs_parameter param = {
 493                 .type = fs_value_is_string,
 494                 .string = arg->from ? arg->from : "",
 495         };
 496         struct fscrypt_dummy_policy *policy =
 497                 &F2FS_OPTION(sbi).dummy_enc_policy;
 498         int err;
 499
 500         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 501                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 502                 return -EINVAL;
 503         }
 504
 505         if (!f2fs_sb_has_encrypt(sbi)) {
 506                 f2fs_err(sbi, "Encrypt feature is off");
 507                 return -EINVAL;
 508         }
 509
 510         /*
 511          * This mount option is just for testing, and it's not worthwhile to
 512          * implement the extra complexity (e.g. RCU protection) that would be
 513          * needed to allow it to be set or changed during remount.  We do allow
 514          * it to be specified during remount, but only if there is no change.
 515          */
 516         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 517                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 518                 return -EINVAL;
 519         }
 520
 521         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 522         if (err) {
 523                 if (err == -EEXIST)
 524                         f2fs_warn(sbi,
 525                                   "Can't change test_dummy_encryption on remount");
 526                 else if (err == -EINVAL)
 527                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 528                                   opt);
 529                 else
 530                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 531                                   opt, err);
 532                 return -EINVAL;
 533         }
 534         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 535         return 0;
 536 }
 537
 538 #ifdef CONFIG_F2FS_FS_COMPRESSION
 539 static bool is_compress_extension_exist(struct f2fs_sb_info *sbi,
 540                                         const char *new_ext, bool is_ext)
 541 {
 542         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 543         int ext_cnt;
 544         int i;
 545
 546         if (is_ext) {
 547                 ext = F2FS_OPTION(sbi).extensions;
 548                 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 549         } else {
 550                 ext = F2FS_OPTION(sbi).noextensions;
 551                 ext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 552         }
 553
 554         for (i = 0; i < ext_cnt; i++) {
 555                 if (!strcasecmp(new_ext, ext[i]))
 556                         return true;
 557         }
 558
 559         return false;
 560 }
 561
 562 /*
 563  * 1. The same extension name cannot not appear in both compress and non-compress extension
 564  * at the same time.
 565  * 2. If the compress extension specifies all files, the types specified by the non-compress
 566  * extension will be treated as special cases and will not be compressed.
 567  * 3. Don't allow the non-compress extension specifies all files.
 568  */
 569 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 570 {
 571         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 572         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 573         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 574
 575         ext = F2FS_OPTION(sbi).extensions;
 576         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 577         noext = F2FS_OPTION(sbi).noextensions;
 578         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 579
 580         if (!noext_cnt)
 581                 return 0;
 582
 583         for (no_index = 0; no_index < noext_cnt; no_index++) {
 584                 if (!strcasecmp("*", noext[no_index])) {
 585                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 586                         return -EINVAL;
 587                 }
 588                 for (index = 0; index < ext_cnt; index++) {
 589                         if (!strcasecmp(ext[index], noext[no_index])) {
 590                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 591                                                 ext[index]);
 592                                 return -EINVAL;
 593                         }
 594                 }
 595         }
 596         return 0;
 597 }
 598
 599 #ifdef CONFIG_F2FS_FS_LZ4
 600 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 601 {
 602 #ifdef CONFIG_F2FS_FS_LZ4HC
 603         unsigned int level;
 604
 605         if (strlen(str) == 3) {
 606                 F2FS_OPTION(sbi).compress_level = 0;
 607                 return 0;
 608         }
 609
 610         str += 3;
 611
 612         if (str[0] != ':') {
 613                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 614                 return -EINVAL;
 615         }
 616         if (kstrtouint(str + 1, 10, &level))
 617                 return -EINVAL;
 618
 619         if (!f2fs_is_compress_level_valid(COMPRESS_LZ4, level)) {
 620                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 621                 return -EINVAL;
 622         }
 623
 624         F2FS_OPTION(sbi).compress_level = level;
 625         return 0;
 626 #else
 627         if (strlen(str) == 3) {
 628                 F2FS_OPTION(sbi).compress_level = 0;
 629                 return 0;
 630         }
 631         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 632         return -EINVAL;
 633 #endif
 634 }
 635 #endif
 636
 637 #ifdef CONFIG_F2FS_FS_ZSTD
 638 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 639 {
 640         int level;
 641         int len = 4;
 642
 643         if (strlen(str) == len) {
 644                 F2FS_OPTION(sbi).compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
 645                 return 0;
 646         }
 647
 648         str += len;
 649
 650         if (str[0] != ':') {
 651                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 652                 return -EINVAL;
 653         }
 654         if (kstrtoint(str + 1, 10, &level))
 655                 return -EINVAL;
 656
 657         /* f2fs does not support negative compress level now */
 658         if (level < 0) {
 659                 f2fs_info(sbi, "do not support negative compress level: %d", level);
 660                 return -ERANGE;
 661         }
 662
 663         if (!f2fs_is_compress_level_valid(COMPRESS_ZSTD, level)) {
 664                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 665                 return -EINVAL;
 666         }
 667
 668         F2FS_OPTION(sbi).compress_level = level;
 669         return 0;
 670 }
 671 #endif
 672 #endif
 673
 674 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 675 {
 676         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 677         substring_t args[MAX_OPT_ARGS];
 678 #ifdef CONFIG_F2FS_FS_COMPRESSION
 679         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 680         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 681         int ext_cnt, noext_cnt;
 682 #endif
 683         char *p, *name;
 684         int arg = 0;
 685         kuid_t uid;
 686         kgid_t gid;
 687         int ret;
 688
 689         if (!options)
 690                 goto default_check;
 691
 692         while ((p = strsep(&options, ",")) != NULL) {
 693                 int token;
 694
 695                 if (!*p)
 696                         continue;
 697                 /*
 698                  * Initialize args struct so we know whether arg was
 699                  * found; some options take optional arguments.
 700                  */
 701                 args[0].to = args[0].from = NULL;
 702                 token = match_token(p, f2fs_tokens, args);
 703
 704                 switch (token) {
 705                 case Opt_gc_background:
 706                         name = match_strdup(&args[0]);
 707
 708                         if (!name)
 709                                 return -ENOMEM;
 710                         if (!strcmp(name, "on")) {
 711                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 712                         } else if (!strcmp(name, "off")) {
 713                                 if (f2fs_sb_has_blkzoned(sbi)) {
 714                                         f2fs_warn(sbi, "zoned devices need bggc");
 715                                         kfree(name);
 716                                         return -EINVAL;
 717                                 }
 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                 case Opt_heap:
 752                         f2fs_warn(sbi, "heap/no_heap options were deprecated");
 753                         break;
 754 #ifdef CONFIG_F2FS_FS_XATTR
 755                 case Opt_user_xattr:
 756                         set_opt(sbi, XATTR_USER);
 757                         break;
 758                 case Opt_nouser_xattr:
 759                         clear_opt(sbi, XATTR_USER);
 760                         break;
 761                 case Opt_inline_xattr:
 762                         set_opt(sbi, INLINE_XATTR);
 763                         break;
 764                 case Opt_noinline_xattr:
 765                         clear_opt(sbi, INLINE_XATTR);
 766                         break;
 767                 case Opt_inline_xattr_size:
 768                         if (args->from && match_int(args, &arg))
 769                                 return -EINVAL;
 770                         set_opt(sbi, INLINE_XATTR_SIZE);
 771                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 772                         break;
 773 #else
 774                 case Opt_user_xattr:
 775                         f2fs_info(sbi, "user_xattr options not supported");
 776                         break;
 777                 case Opt_nouser_xattr:
 778                         f2fs_info(sbi, "nouser_xattr options not supported");
 779                         break;
 780                 case Opt_inline_xattr:
 781                         f2fs_info(sbi, "inline_xattr options not supported");
 782                         break;
 783                 case Opt_noinline_xattr:
 784                         f2fs_info(sbi, "noinline_xattr options not supported");
 785                         break;
 786 #endif
 787 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 788                 case Opt_acl:
 789                         set_opt(sbi, POSIX_ACL);
 790                         break;
 791                 case Opt_noacl:
 792                         clear_opt(sbi, POSIX_ACL);
 793                         break;
 794 #else
 795                 case Opt_acl:
 796                         f2fs_info(sbi, "acl options not supported");
 797                         break;
 798                 case Opt_noacl:
 799                         f2fs_info(sbi, "noacl options not supported");
 800                         break;
 801 #endif
 802                 case Opt_active_logs:
 803                         if (args->from && match_int(args, &arg))
 804                                 return -EINVAL;
 805                         if (arg != 2 && arg != 4 &&
 806                                 arg != NR_CURSEG_PERSIST_TYPE)
 807                                 return -EINVAL;
 808                         F2FS_OPTION(sbi).active_logs = arg;
 809                         break;
 810                 case Opt_disable_ext_identify:
 811                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 812                         break;
 813                 case Opt_inline_data:
 814                         set_opt(sbi, INLINE_DATA);
 815                         break;
 816                 case Opt_inline_dentry:
 817                         set_opt(sbi, INLINE_DENTRY);
 818                         break;
 819                 case Opt_noinline_dentry:
 820                         clear_opt(sbi, INLINE_DENTRY);
 821                         break;
 822                 case Opt_flush_merge:
 823                         set_opt(sbi, FLUSH_MERGE);
 824                         break;
 825                 case Opt_noflush_merge:
 826                         clear_opt(sbi, FLUSH_MERGE);
 827                         break;
 828                 case Opt_nobarrier:
 829                         set_opt(sbi, NOBARRIER);
 830                         break;
 831                 case Opt_barrier:
 832                         clear_opt(sbi, NOBARRIER);
 833                         break;
 834                 case Opt_fastboot:
 835                         set_opt(sbi, FASTBOOT);
 836                         break;
 837                 case Opt_extent_cache:
 838                         set_opt(sbi, READ_EXTENT_CACHE);
 839                         break;
 840                 case Opt_noextent_cache:
 841                         if (F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_DEVICE_ALIAS)) {
 842                                 f2fs_err(sbi, "device aliasing requires extent cache");
 843                                 return -EINVAL;
 844                         }
 845                         clear_opt(sbi, READ_EXTENT_CACHE);
 846                         break;
 847                 case Opt_noinline_data:
 848                         clear_opt(sbi, INLINE_DATA);
 849                         break;
 850                 case Opt_data_flush:
 851                         set_opt(sbi, DATA_FLUSH);
 852                         break;
 853                 case Opt_reserve_root:
 854                         if (args->from && match_int(args, &arg))
 855                                 return -EINVAL;
 856                         if (test_opt(sbi, RESERVE_ROOT)) {
 857                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 858                                           F2FS_OPTION(sbi).root_reserved_blocks);
 859                         } else {
 860                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 861                                 set_opt(sbi, RESERVE_ROOT);
 862                         }
 863                         break;
 864                 case Opt_resuid:
 865                         if (args->from && match_int(args, &arg))
 866                                 return -EINVAL;
 867                         uid = make_kuid(current_user_ns(), arg);
 868                         if (!uid_valid(uid)) {
 869                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 870                                 return -EINVAL;
 871                         }
 872                         F2FS_OPTION(sbi).s_resuid = uid;
 873                         break;
 874                 case Opt_resgid:
 875                         if (args->from && match_int(args, &arg))
 876                                 return -EINVAL;
 877                         gid = make_kgid(current_user_ns(), arg);
 878                         if (!gid_valid(gid)) {
 879                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 880                                 return -EINVAL;
 881                         }
 882                         F2FS_OPTION(sbi).s_resgid = gid;
 883                         break;
 884                 case Opt_mode:
 885                         name = match_strdup(&args[0]);
 886
 887                         if (!name)
 888                                 return -ENOMEM;
 889                         if (!strcmp(name, "adaptive")) {
 890                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 891                         } else if (!strcmp(name, "lfs")) {
 892                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 893                         } else if (!strcmp(name, "fragment:segment")) {
 894                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 895                         } else if (!strcmp(name, "fragment:block")) {
 896                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 897                         } else {
 898                                 kfree(name);
 899                                 return -EINVAL;
 900                         }
 901                         kfree(name);
 902                         break;
 903 #ifdef CONFIG_F2FS_FAULT_INJECTION
 904                 case Opt_fault_injection:
 905                         if (args->from && match_int(args, &arg))
 906                                 return -EINVAL;
 907                         if (f2fs_build_fault_attr(sbi, arg,
 908                                         F2FS_ALL_FAULT_TYPE))
 909                                 return -EINVAL;
 910                         set_opt(sbi, FAULT_INJECTION);
 911                         break;
 912
 913                 case Opt_fault_type:
 914                         if (args->from && match_int(args, &arg))
 915                                 return -EINVAL;
 916                         if (f2fs_build_fault_attr(sbi, 0, arg))
 917                                 return -EINVAL;
 918                         set_opt(sbi, FAULT_INJECTION);
 919                         break;
 920 #else
 921                 case Opt_fault_injection:
 922                         f2fs_info(sbi, "fault_injection options not supported");
 923                         break;
 924
 925                 case Opt_fault_type:
 926                         f2fs_info(sbi, "fault_type options not supported");
 927                         break;
 928 #endif
 929                 case Opt_lazytime:
 930                         sb->s_flags |= SB_LAZYTIME;
 931                         break;
 932                 case Opt_nolazytime:
 933                         sb->s_flags &= ~SB_LAZYTIME;
 934                         break;
 935 #ifdef CONFIG_QUOTA
 936                 case Opt_quota:
 937                 case Opt_usrquota:
 938                         set_opt(sbi, USRQUOTA);
 939                         break;
 940                 case Opt_grpquota:
 941                         set_opt(sbi, GRPQUOTA);
 942                         break;
 943                 case Opt_prjquota:
 944                         set_opt(sbi, PRJQUOTA);
 945                         break;
 946                 case Opt_usrjquota:
 947                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 948                         if (ret)
 949                                 return ret;
 950                         break;
 951                 case Opt_grpjquota:
 952                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 953                         if (ret)
 954                                 return ret;
 955                         break;
 956                 case Opt_prjjquota:
 957                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 958                         if (ret)
 959                                 return ret;
 960                         break;
 961                 case Opt_offusrjquota:
 962                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 963                         if (ret)
 964                                 return ret;
 965                         break;
 966                 case Opt_offgrpjquota:
 967                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 968                         if (ret)
 969                                 return ret;
 970                         break;
 971                 case Opt_offprjjquota:
 972                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 973                         if (ret)
 974                                 return ret;
 975                         break;
 976                 case Opt_jqfmt_vfsold:
 977                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 978                         break;
 979                 case Opt_jqfmt_vfsv0:
 980                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 981                         break;
 982                 case Opt_jqfmt_vfsv1:
 983                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 984                         break;
 985                 case Opt_noquota:
 986                         clear_opt(sbi, QUOTA);
 987                         clear_opt(sbi, USRQUOTA);
 988                         clear_opt(sbi, GRPQUOTA);
 989                         clear_opt(sbi, PRJQUOTA);
 990                         break;
 991 #else
 992                 case Opt_quota:
 993                 case Opt_usrquota:
 994                 case Opt_grpquota:
 995                 case Opt_prjquota:
 996                 case Opt_usrjquota:
 997                 case Opt_grpjquota:
 998                 case Opt_prjjquota:
 999                 case Opt_offusrjquota:
1000                 case Opt_offgrpjquota:
1001                 case Opt_offprjjquota:
1002                 case Opt_jqfmt_vfsold:
1003                 case Opt_jqfmt_vfsv0:
1004                 case Opt_jqfmt_vfsv1:
1005                 case Opt_noquota:
1006                         f2fs_info(sbi, "quota operations not supported");
1007                         break;
1008 #endif
1009                 case Opt_alloc:
1010                         name = match_strdup(&args[0]);
1011                         if (!name)
1012                                 return -ENOMEM;
1013
1014                         if (!strcmp(name, "default")) {
1015                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1016                         } else if (!strcmp(name, "reuse")) {
1017                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1018                         } else {
1019                                 kfree(name);
1020                                 return -EINVAL;
1021                         }
1022                         kfree(name);
1023                         break;
1024                 case Opt_fsync:
1025                         name = match_strdup(&args[0]);
1026                         if (!name)
1027                                 return -ENOMEM;
1028                         if (!strcmp(name, "posix")) {
1029                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1030                         } else if (!strcmp(name, "strict")) {
1031                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1032                         } else if (!strcmp(name, "nobarrier")) {
1033                                 F2FS_OPTION(sbi).fsync_mode =
1034                                                         FSYNC_MODE_NOBARRIER;
1035                         } else {
1036                                 kfree(name);
1037                                 return -EINVAL;
1038                         }
1039                         kfree(name);
1040                         break;
1041                 case Opt_test_dummy_encryption:
1042                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1043                                                              is_remount);
1044                         if (ret)
1045                                 return ret;
1046                         break;
1047                 case Opt_inlinecrypt:
1048 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1049                         sb->s_flags |= SB_INLINECRYPT;
1050 #else
1051                         f2fs_info(sbi, "inline encryption not supported");
1052 #endif
1053                         break;
1054                 case Opt_checkpoint_disable_cap_perc:
1055                         if (args->from && match_int(args, &arg))
1056                                 return -EINVAL;
1057                         if (arg < 0 || arg > 100)
1058                                 return -EINVAL;
1059                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1060                         set_opt(sbi, DISABLE_CHECKPOINT);
1061                         break;
1062                 case Opt_checkpoint_disable_cap:
1063                         if (args->from && match_int(args, &arg))
1064                                 return -EINVAL;
1065                         F2FS_OPTION(sbi).unusable_cap = arg;
1066                         set_opt(sbi, DISABLE_CHECKPOINT);
1067                         break;
1068                 case Opt_checkpoint_disable:
1069                         set_opt(sbi, DISABLE_CHECKPOINT);
1070                         break;
1071                 case Opt_checkpoint_enable:
1072                         clear_opt(sbi, DISABLE_CHECKPOINT);
1073                         break;
1074                 case Opt_checkpoint_merge:
1075                         set_opt(sbi, MERGE_CHECKPOINT);
1076                         break;
1077                 case Opt_nocheckpoint_merge:
1078                         clear_opt(sbi, MERGE_CHECKPOINT);
1079                         break;
1080 #ifdef CONFIG_F2FS_FS_COMPRESSION
1081                 case Opt_compress_algorithm:
1082                         if (!f2fs_sb_has_compression(sbi)) {
1083                                 f2fs_info(sbi, "Image doesn't support compression");
1084                                 break;
1085                         }
1086                         name = match_strdup(&args[0]);
1087                         if (!name)
1088                                 return -ENOMEM;
1089                         if (!strcmp(name, "lzo")) {
1090 #ifdef CONFIG_F2FS_FS_LZO
1091                                 F2FS_OPTION(sbi).compress_level = 0;
1092                                 F2FS_OPTION(sbi).compress_algorithm =
1093                                                                 COMPRESS_LZO;
1094 #else
1095                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1096 #endif
1097                         } else if (!strncmp(name, "lz4", 3)) {
1098 #ifdef CONFIG_F2FS_FS_LZ4
1099                                 ret = f2fs_set_lz4hc_level(sbi, name);
1100                                 if (ret) {
1101                                         kfree(name);
1102                                         return -EINVAL;
1103                                 }
1104                                 F2FS_OPTION(sbi).compress_algorithm =
1105                                                                 COMPRESS_LZ4;
1106 #else
1107                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1108 #endif
1109                         } else if (!strncmp(name, "zstd", 4)) {
1110 #ifdef CONFIG_F2FS_FS_ZSTD
1111                                 ret = f2fs_set_zstd_level(sbi, name);
1112                                 if (ret) {
1113                                         kfree(name);
1114                                         return -EINVAL;
1115                                 }
1116                                 F2FS_OPTION(sbi).compress_algorithm =
1117                                                                 COMPRESS_ZSTD;
1118 #else
1119                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1120 #endif
1121                         } else if (!strcmp(name, "lzo-rle")) {
1122 #ifdef CONFIG_F2FS_FS_LZORLE
1123                                 F2FS_OPTION(sbi).compress_level = 0;
1124                                 F2FS_OPTION(sbi).compress_algorithm =
1125                                                                 COMPRESS_LZORLE;
1126 #else
1127                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1128 #endif
1129                         } else {
1130                                 kfree(name);
1131                                 return -EINVAL;
1132                         }
1133                         kfree(name);
1134                         break;
1135                 case Opt_compress_log_size:
1136                         if (!f2fs_sb_has_compression(sbi)) {
1137                                 f2fs_info(sbi, "Image doesn't support compression");
1138                                 break;
1139                         }
1140                         if (args->from && match_int(args, &arg))
1141                                 return -EINVAL;
1142                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1143                                 arg > MAX_COMPRESS_LOG_SIZE) {
1144                                 f2fs_err(sbi,
1145                                         "Compress cluster log size is out of range");
1146                                 return -EINVAL;
1147                         }
1148                         F2FS_OPTION(sbi).compress_log_size = arg;
1149                         break;
1150                 case Opt_compress_extension:
1151                         if (!f2fs_sb_has_compression(sbi)) {
1152                                 f2fs_info(sbi, "Image doesn't support compression");
1153                                 break;
1154                         }
1155                         name = match_strdup(&args[0]);
1156                         if (!name)
1157                                 return -ENOMEM;
1158
1159                         ext = F2FS_OPTION(sbi).extensions;
1160                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1161
1162                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1163                                 ext_cnt >= COMPRESS_EXT_NUM) {
1164                                 f2fs_err(sbi,
1165                                         "invalid extension length/number");
1166                                 kfree(name);
1167                                 return -EINVAL;
1168                         }
1169
1170                         if (is_compress_extension_exist(sbi, name, true)) {
1171                                 kfree(name);
1172                                 break;
1173                         }
1174
1175                         ret = strscpy(ext[ext_cnt], name);
1176                         if (ret < 0) {
1177                                 kfree(name);
1178                                 return ret;
1179                         }
1180                         F2FS_OPTION(sbi).compress_ext_cnt++;
1181                         kfree(name);
1182                         break;
1183                 case Opt_nocompress_extension:
1184                         if (!f2fs_sb_has_compression(sbi)) {
1185                                 f2fs_info(sbi, "Image doesn't support compression");
1186                                 break;
1187                         }
1188                         name = match_strdup(&args[0]);
1189                         if (!name)
1190                                 return -ENOMEM;
1191
1192                         noext = F2FS_OPTION(sbi).noextensions;
1193                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1194
1195                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1196                                 noext_cnt >= COMPRESS_EXT_NUM) {
1197                                 f2fs_err(sbi,
1198                                         "invalid extension length/number");
1199                                 kfree(name);
1200                                 return -EINVAL;
1201                         }
1202
1203                         if (is_compress_extension_exist(sbi, name, false)) {
1204                                 kfree(name);
1205                                 break;
1206                         }
1207
1208                         ret = strscpy(noext[noext_cnt], name);
1209                         if (ret < 0) {
1210                                 kfree(name);
1211                                 return ret;
1212                         }
1213                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1214                         kfree(name);
1215                         break;
1216                 case Opt_compress_chksum:
1217                         if (!f2fs_sb_has_compression(sbi)) {
1218                                 f2fs_info(sbi, "Image doesn't support compression");
1219                                 break;
1220                         }
1221                         F2FS_OPTION(sbi).compress_chksum = true;
1222                         break;
1223                 case Opt_compress_mode:
1224                         if (!f2fs_sb_has_compression(sbi)) {
1225                                 f2fs_info(sbi, "Image doesn't support compression");
1226                                 break;
1227                         }
1228                         name = match_strdup(&args[0]);
1229                         if (!name)
1230                                 return -ENOMEM;
1231                         if (!strcmp(name, "fs")) {
1232                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1233                         } else if (!strcmp(name, "user")) {
1234                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1235                         } else {
1236                                 kfree(name);
1237                                 return -EINVAL;
1238                         }
1239                         kfree(name);
1240                         break;
1241                 case Opt_compress_cache:
1242                         if (!f2fs_sb_has_compression(sbi)) {
1243                                 f2fs_info(sbi, "Image doesn't support compression");
1244                                 break;
1245                         }
1246                         set_opt(sbi, COMPRESS_CACHE);
1247                         break;
1248 #else
1249                 case Opt_compress_algorithm:
1250                 case Opt_compress_log_size:
1251                 case Opt_compress_extension:
1252                 case Opt_nocompress_extension:
1253                 case Opt_compress_chksum:
1254                 case Opt_compress_mode:
1255                 case Opt_compress_cache:
1256                         f2fs_info(sbi, "compression options not supported");
1257                         break;
1258 #endif
1259                 case Opt_atgc:
1260                         set_opt(sbi, ATGC);
1261                         break;
1262                 case Opt_gc_merge:
1263                         set_opt(sbi, GC_MERGE);
1264                         break;
1265                 case Opt_nogc_merge:
1266                         clear_opt(sbi, GC_MERGE);
1267                         break;
1268                 case Opt_discard_unit:
1269                         name = match_strdup(&args[0]);
1270                         if (!name)
1271                                 return -ENOMEM;
1272                         if (!strcmp(name, "block")) {
1273                                 F2FS_OPTION(sbi).discard_unit =
1274                                                 DISCARD_UNIT_BLOCK;
1275                         } else if (!strcmp(name, "segment")) {
1276                                 F2FS_OPTION(sbi).discard_unit =
1277                                                 DISCARD_UNIT_SEGMENT;
1278                         } else if (!strcmp(name, "section")) {
1279                                 F2FS_OPTION(sbi).discard_unit =
1280                                                 DISCARD_UNIT_SECTION;
1281                         } else {
1282                                 kfree(name);
1283                                 return -EINVAL;
1284                         }
1285                         kfree(name);
1286                         break;
1287                 case Opt_memory_mode:
1288                         name = match_strdup(&args[0]);
1289                         if (!name)
1290                                 return -ENOMEM;
1291                         if (!strcmp(name, "normal")) {
1292                                 F2FS_OPTION(sbi).memory_mode =
1293                                                 MEMORY_MODE_NORMAL;
1294                         } else if (!strcmp(name, "low")) {
1295                                 F2FS_OPTION(sbi).memory_mode =
1296                                                 MEMORY_MODE_LOW;
1297                         } else {
1298                                 kfree(name);
1299                                 return -EINVAL;
1300                         }
1301                         kfree(name);
1302                         break;
1303                 case Opt_age_extent_cache:
1304                         set_opt(sbi, AGE_EXTENT_CACHE);
1305                         break;
1306                 case Opt_errors:
1307                         name = match_strdup(&args[0]);
1308                         if (!name)
1309                                 return -ENOMEM;
1310                         if (!strcmp(name, "remount-ro")) {
1311                                 F2FS_OPTION(sbi).errors =
1312                                                 MOUNT_ERRORS_READONLY;
1313                         } else if (!strcmp(name, "continue")) {
1314                                 F2FS_OPTION(sbi).errors =
1315                                                 MOUNT_ERRORS_CONTINUE;
1316                         } else if (!strcmp(name, "panic")) {
1317                                 F2FS_OPTION(sbi).errors =
1318                                                 MOUNT_ERRORS_PANIC;
1319                         } else {
1320                                 kfree(name);
1321                                 return -EINVAL;
1322                         }
1323                         kfree(name);
1324                         break;
1325                 default:
1326                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1327                                  p);
1328                         return -EINVAL;
1329                 }
1330         }
1331 default_check:
1332 #ifdef CONFIG_QUOTA
1333         if (f2fs_check_quota_options(sbi))
1334                 return -EINVAL;
1335 #else
1336         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1337                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1338                 return -EINVAL;
1339         }
1340         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1341                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1342                 return -EINVAL;
1343         }
1344 #endif
1345
1346         if (!IS_ENABLED(CONFIG_UNICODE) && f2fs_sb_has_casefold(sbi)) {
1347                 f2fs_err(sbi,
1348                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1349                 return -EINVAL;
1350         }
1351
1352         /*
1353          * The BLKZONED feature indicates that the drive was formatted with
1354          * zone alignment optimization. This is optional for host-aware
1355          * devices, but mandatory for host-managed zoned block devices.
1356          */
1357         if (f2fs_sb_has_blkzoned(sbi)) {
1358 #ifdef CONFIG_BLK_DEV_ZONED
1359                 if (F2FS_OPTION(sbi).discard_unit !=
1360                                                 DISCARD_UNIT_SECTION) {
1361                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1362                         F2FS_OPTION(sbi).discard_unit =
1363                                         DISCARD_UNIT_SECTION;
1364                 }
1365
1366                 if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) {
1367                         f2fs_info(sbi, "Only lfs mode is allowed with zoned block device feature");
1368                         return -EINVAL;
1369                 }
1370 #else
1371                 f2fs_err(sbi, "Zoned block device support is not enabled");
1372                 return -EINVAL;
1373 #endif
1374         }
1375
1376 #ifdef CONFIG_F2FS_FS_COMPRESSION
1377         if (f2fs_test_compress_extension(sbi)) {
1378                 f2fs_err(sbi, "invalid compress or nocompress extension");
1379                 return -EINVAL;
1380         }
1381 #endif
1382
1383         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1384                 int min_size, max_size;
1385
1386                 if (!f2fs_sb_has_extra_attr(sbi) ||
1387                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1388                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1389                         return -EINVAL;
1390                 }
1391                 if (!test_opt(sbi, INLINE_XATTR)) {
1392                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1393                         return -EINVAL;
1394                 }
1395
1396                 min_size = MIN_INLINE_XATTR_SIZE;
1397                 max_size = MAX_INLINE_XATTR_SIZE;
1398
1399                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1400                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1401                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1402                                  min_size, max_size);
1403                         return -EINVAL;
1404                 }
1405         }
1406
1407         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1408                 f2fs_err(sbi, "LFS is not compatible with ATGC");
1409                 return -EINVAL;
1410         }
1411
1412         if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1413                 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1414                 return -EINVAL;
1415         }
1416
1417         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1418                 f2fs_err(sbi, "Allow to mount readonly mode only");
1419                 return -EROFS;
1420         }
1421         return 0;
1422 }
1423
1424 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1425 {
1426         struct f2fs_inode_info *fi;
1427
1428         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC))
1429                 return NULL;
1430
1431         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1432         if (!fi)
1433                 return NULL;
1434
1435         init_once((void *) fi);
1436
1437         /* Initialize f2fs-specific inode info */
1438         atomic_set(&fi->dirty_pages, 0);
1439         atomic_set(&fi->i_compr_blocks, 0);
1440         init_f2fs_rwsem(&fi->i_sem);
1441         spin_lock_init(&fi->i_size_lock);
1442         INIT_LIST_HEAD(&fi->dirty_list);
1443         INIT_LIST_HEAD(&fi->gdirty_list);
1444         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1445         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1446         init_f2fs_rwsem(&fi->i_xattr_sem);
1447
1448         /* Will be used by directory only */
1449         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1450
1451         return &fi->vfs_inode;
1452 }
1453
1454 static int f2fs_drop_inode(struct inode *inode)
1455 {
1456         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1457         int ret;
1458
1459         /*
1460          * during filesystem shutdown, if checkpoint is disabled,
1461          * drop useless meta/node dirty pages.
1462          */
1463         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1464                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1465                         inode->i_ino == F2FS_META_INO(sbi)) {
1466                         trace_f2fs_drop_inode(inode, 1);
1467                         return 1;
1468                 }
1469         }
1470
1471         /*
1472          * This is to avoid a deadlock condition like below.
1473          * writeback_single_inode(inode)
1474          *  - f2fs_write_data_page
1475          *    - f2fs_gc -> iput -> evict
1476          *       - inode_wait_for_writeback(inode)
1477          */
1478         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1479                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1480                         /* to avoid evict_inode call simultaneously */
1481                         atomic_inc(&inode->i_count);
1482                         spin_unlock(&inode->i_lock);
1483
1484                         /* should remain fi->extent_tree for writepage */
1485                         f2fs_destroy_extent_node(inode);
1486
1487                         sb_start_intwrite(inode->i_sb);
1488                         f2fs_i_size_write(inode, 0);
1489
1490                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1491                                         inode, NULL, 0, DATA);
1492                         truncate_inode_pages_final(inode->i_mapping);
1493
1494                         if (F2FS_HAS_BLOCKS(inode))
1495                                 f2fs_truncate(inode);
1496
1497                         sb_end_intwrite(inode->i_sb);
1498
1499                         spin_lock(&inode->i_lock);
1500                         atomic_dec(&inode->i_count);
1501                 }
1502                 trace_f2fs_drop_inode(inode, 0);
1503                 return 0;
1504         }
1505         ret = generic_drop_inode(inode);
1506         if (!ret)
1507                 ret = fscrypt_drop_inode(inode);
1508         trace_f2fs_drop_inode(inode, ret);
1509         return ret;
1510 }
1511
1512 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1513 {
1514         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1515         int ret = 0;
1516
1517         spin_lock(&sbi->inode_lock[DIRTY_META]);
1518         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1519                 ret = 1;
1520         } else {
1521                 set_inode_flag(inode, FI_DIRTY_INODE);
1522                 stat_inc_dirty_inode(sbi, DIRTY_META);
1523         }
1524         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1525                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1526                                 &sbi->inode_list[DIRTY_META]);
1527                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1528         }
1529         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1530         return ret;
1531 }
1532
1533 void f2fs_inode_synced(struct inode *inode)
1534 {
1535         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1536
1537         spin_lock(&sbi->inode_lock[DIRTY_META]);
1538         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1539                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1540                 return;
1541         }
1542         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1543                 list_del_init(&F2FS_I(inode)->gdirty_list);
1544                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1545         }
1546         clear_inode_flag(inode, FI_DIRTY_INODE);
1547         clear_inode_flag(inode, FI_AUTO_RECOVER);
1548         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1549         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1550 }
1551
1552 /*
1553  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1554  *
1555  * We should call set_dirty_inode to write the dirty inode through write_inode.
1556  */
1557 static void f2fs_dirty_inode(struct inode *inode, int flags)
1558 {
1559         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1560
1561         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1562                         inode->i_ino == F2FS_META_INO(sbi))
1563                 return;
1564
1565         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1566                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1567
1568         f2fs_inode_dirtied(inode, false);
1569 }
1570
1571 static void f2fs_free_inode(struct inode *inode)
1572 {
1573         fscrypt_free_inode(inode);
1574         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1575 }
1576
1577 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1578 {
1579         percpu_counter_destroy(&sbi->total_valid_inode_count);
1580         percpu_counter_destroy(&sbi->rf_node_block_count);
1581         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1582 }
1583
1584 static void destroy_device_list(struct f2fs_sb_info *sbi)
1585 {
1586         int i;
1587
1588         for (i = 0; i < sbi->s_ndevs; i++) {
1589                 if (i > 0)
1590                         bdev_fput(FDEV(i).bdev_file);
1591 #ifdef CONFIG_BLK_DEV_ZONED
1592                 kvfree(FDEV(i).blkz_seq);
1593 #endif
1594         }
1595         kvfree(sbi->devs);
1596 }
1597
1598 static void f2fs_put_super(struct super_block *sb)
1599 {
1600         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1601         int i;
1602         int err = 0;
1603         bool done;
1604
1605         /* unregister procfs/sysfs entries in advance to avoid race case */
1606         f2fs_unregister_sysfs(sbi);
1607
1608         f2fs_quota_off_umount(sb);
1609
1610         /* prevent remaining shrinker jobs */
1611         mutex_lock(&sbi->umount_mutex);
1612
1613         /*
1614          * flush all issued checkpoints and stop checkpoint issue thread.
1615          * after then, all checkpoints should be done by each process context.
1616          */
1617         f2fs_stop_ckpt_thread(sbi);
1618
1619         /*
1620          * We don't need to do checkpoint when superblock is clean.
1621          * But, the previous checkpoint was not done by umount, it needs to do
1622          * clean checkpoint again.
1623          */
1624         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1625                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1626                 struct cp_control cpc = {
1627                         .reason = CP_UMOUNT,
1628                 };
1629                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1630                 err = f2fs_write_checkpoint(sbi, &cpc);
1631         }
1632
1633         /* be sure to wait for any on-going discard commands */
1634         done = f2fs_issue_discard_timeout(sbi);
1635         if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && done) {
1636                 struct cp_control cpc = {
1637                         .reason = CP_UMOUNT | CP_TRIMMED,
1638                 };
1639                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1640                 err = f2fs_write_checkpoint(sbi, &cpc);
1641         }
1642
1643         /*
1644          * normally superblock is clean, so we need to release this.
1645          * In addition, EIO will skip do checkpoint, we need this as well.
1646          */
1647         f2fs_release_ino_entry(sbi, true);
1648
1649         f2fs_leave_shrinker(sbi);
1650         mutex_unlock(&sbi->umount_mutex);
1651
1652         /* our cp_error case, we can wait for any writeback page */
1653         f2fs_flush_merged_writes(sbi);
1654
1655         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1656
1657         if (err || f2fs_cp_error(sbi)) {
1658                 truncate_inode_pages_final(NODE_MAPPING(sbi));
1659                 truncate_inode_pages_final(META_MAPPING(sbi));
1660         }
1661
1662         for (i = 0; i < NR_COUNT_TYPE; i++) {
1663                 if (!get_pages(sbi, i))
1664                         continue;
1665                 f2fs_err(sbi, "detect filesystem reference count leak during "
1666                         "umount, type: %d, count: %lld", i, get_pages(sbi, i));
1667                 f2fs_bug_on(sbi, 1);
1668         }
1669
1670         f2fs_bug_on(sbi, sbi->fsync_node_num);
1671
1672         f2fs_destroy_compress_inode(sbi);
1673
1674         iput(sbi->node_inode);
1675         sbi->node_inode = NULL;
1676
1677         iput(sbi->meta_inode);
1678         sbi->meta_inode = NULL;
1679
1680         /*
1681          * iput() can update stat information, if f2fs_write_checkpoint()
1682          * above failed with error.
1683          */
1684         f2fs_destroy_stats(sbi);
1685
1686         /* destroy f2fs internal modules */
1687         f2fs_destroy_node_manager(sbi);
1688         f2fs_destroy_segment_manager(sbi);
1689
1690         /* flush s_error_work before sbi destroy */
1691         flush_work(&sbi->s_error_work);
1692
1693         f2fs_destroy_post_read_wq(sbi);
1694
1695         kvfree(sbi->ckpt);
1696
1697         if (sbi->s_chksum_driver)
1698                 crypto_free_shash(sbi->s_chksum_driver);
1699         kfree(sbi->raw_super);
1700
1701         f2fs_destroy_page_array_cache(sbi);
1702         f2fs_destroy_xattr_caches(sbi);
1703 #ifdef CONFIG_QUOTA
1704         for (i = 0; i < MAXQUOTAS; i++)
1705                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1706 #endif
1707         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1708         destroy_percpu_info(sbi);
1709         f2fs_destroy_iostat(sbi);
1710         for (i = 0; i < NR_PAGE_TYPE; i++)
1711                 kvfree(sbi->write_io[i]);
1712 #if IS_ENABLED(CONFIG_UNICODE)
1713         utf8_unload(sb->s_encoding);
1714 #endif
1715 }
1716
1717 int f2fs_sync_fs(struct super_block *sb, int sync)
1718 {
1719         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1720         int err = 0;
1721
1722         if (unlikely(f2fs_cp_error(sbi)))
1723                 return 0;
1724         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1725                 return 0;
1726
1727         trace_f2fs_sync_fs(sb, sync);
1728
1729         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1730                 return -EAGAIN;
1731
1732         if (sync) {
1733                 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1734                 err = f2fs_issue_checkpoint(sbi);
1735         }
1736
1737         return err;
1738 }
1739
1740 static int f2fs_freeze(struct super_block *sb)
1741 {
1742         if (f2fs_readonly(sb))
1743                 return 0;
1744
1745         /* IO error happened before */
1746         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1747                 return -EIO;
1748
1749         /* must be clean, since sync_filesystem() was already called */
1750         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1751                 return -EINVAL;
1752
1753         /* Let's flush checkpoints and stop the thread. */
1754         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1755
1756         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1757         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1758         return 0;
1759 }
1760
1761 static int f2fs_unfreeze(struct super_block *sb)
1762 {
1763         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1764
1765         /*
1766          * It will update discard_max_bytes of mounted lvm device to zero
1767          * after creating snapshot on this lvm device, let's drop all
1768          * remained discards.
1769          * We don't need to disable real-time discard because discard_max_bytes
1770          * will recover after removal of snapshot.
1771          */
1772         if (test_opt(sbi, DISCARD) && !f2fs_hw_support_discard(sbi))
1773                 f2fs_issue_discard_timeout(sbi);
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 #ifdef CONFIG_F2FS_FS_XATTR
2006         if (test_opt(sbi, XATTR_USER))
2007                 seq_puts(seq, ",user_xattr");
2008         else
2009                 seq_puts(seq, ",nouser_xattr");
2010         if (test_opt(sbi, INLINE_XATTR))
2011                 seq_puts(seq, ",inline_xattr");
2012         else
2013                 seq_puts(seq, ",noinline_xattr");
2014         if (test_opt(sbi, INLINE_XATTR_SIZE))
2015                 seq_printf(seq, ",inline_xattr_size=%u",
2016                                         F2FS_OPTION(sbi).inline_xattr_size);
2017 #endif
2018 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2019         if (test_opt(sbi, POSIX_ACL))
2020                 seq_puts(seq, ",acl");
2021         else
2022                 seq_puts(seq, ",noacl");
2023 #endif
2024         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
2025                 seq_puts(seq, ",disable_ext_identify");
2026         if (test_opt(sbi, INLINE_DATA))
2027                 seq_puts(seq, ",inline_data");
2028         else
2029                 seq_puts(seq, ",noinline_data");
2030         if (test_opt(sbi, INLINE_DENTRY))
2031                 seq_puts(seq, ",inline_dentry");
2032         else
2033                 seq_puts(seq, ",noinline_dentry");
2034         if (test_opt(sbi, FLUSH_MERGE))
2035                 seq_puts(seq, ",flush_merge");
2036         else
2037                 seq_puts(seq, ",noflush_merge");
2038         if (test_opt(sbi, NOBARRIER))
2039                 seq_puts(seq, ",nobarrier");
2040         else
2041                 seq_puts(seq, ",barrier");
2042         if (test_opt(sbi, FASTBOOT))
2043                 seq_puts(seq, ",fastboot");
2044         if (test_opt(sbi, READ_EXTENT_CACHE))
2045                 seq_puts(seq, ",extent_cache");
2046         else
2047                 seq_puts(seq, ",noextent_cache");
2048         if (test_opt(sbi, AGE_EXTENT_CACHE))
2049                 seq_puts(seq, ",age_extent_cache");
2050         if (test_opt(sbi, DATA_FLUSH))
2051                 seq_puts(seq, ",data_flush");
2052
2053         seq_puts(seq, ",mode=");
2054         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
2055                 seq_puts(seq, "adaptive");
2056         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
2057                 seq_puts(seq, "lfs");
2058         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
2059                 seq_puts(seq, "fragment:segment");
2060         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2061                 seq_puts(seq, "fragment:block");
2062         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
2063         if (test_opt(sbi, RESERVE_ROOT))
2064                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
2065                                 F2FS_OPTION(sbi).root_reserved_blocks,
2066                                 from_kuid_munged(&init_user_ns,
2067                                         F2FS_OPTION(sbi).s_resuid),
2068                                 from_kgid_munged(&init_user_ns,
2069                                         F2FS_OPTION(sbi).s_resgid));
2070 #ifdef CONFIG_F2FS_FAULT_INJECTION
2071         if (test_opt(sbi, FAULT_INJECTION)) {
2072                 seq_printf(seq, ",fault_injection=%u",
2073                                 F2FS_OPTION(sbi).fault_info.inject_rate);
2074                 seq_printf(seq, ",fault_type=%u",
2075                                 F2FS_OPTION(sbi).fault_info.inject_type);
2076         }
2077 #endif
2078 #ifdef CONFIG_QUOTA
2079         if (test_opt(sbi, QUOTA))
2080                 seq_puts(seq, ",quota");
2081         if (test_opt(sbi, USRQUOTA))
2082                 seq_puts(seq, ",usrquota");
2083         if (test_opt(sbi, GRPQUOTA))
2084                 seq_puts(seq, ",grpquota");
2085         if (test_opt(sbi, PRJQUOTA))
2086                 seq_puts(seq, ",prjquota");
2087 #endif
2088         f2fs_show_quota_options(seq, sbi->sb);
2089
2090         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2091
2092         if (sbi->sb->s_flags & SB_INLINECRYPT)
2093                 seq_puts(seq, ",inlinecrypt");
2094
2095         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2096                 seq_printf(seq, ",alloc_mode=%s", "default");
2097         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2098                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2099
2100         if (test_opt(sbi, DISABLE_CHECKPOINT))
2101                 seq_printf(seq, ",checkpoint=disable:%u",
2102                                 F2FS_OPTION(sbi).unusable_cap);
2103         if (test_opt(sbi, MERGE_CHECKPOINT))
2104                 seq_puts(seq, ",checkpoint_merge");
2105         else
2106                 seq_puts(seq, ",nocheckpoint_merge");
2107         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2108                 seq_printf(seq, ",fsync_mode=%s", "posix");
2109         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2110                 seq_printf(seq, ",fsync_mode=%s", "strict");
2111         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2112                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2113
2114 #ifdef CONFIG_F2FS_FS_COMPRESSION
2115         f2fs_show_compress_options(seq, sbi->sb);
2116 #endif
2117
2118         if (test_opt(sbi, ATGC))
2119                 seq_puts(seq, ",atgc");
2120
2121         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2122                 seq_printf(seq, ",memory=%s", "normal");
2123         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2124                 seq_printf(seq, ",memory=%s", "low");
2125
2126         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
2127                 seq_printf(seq, ",errors=%s", "remount-ro");
2128         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
2129                 seq_printf(seq, ",errors=%s", "continue");
2130         else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
2131                 seq_printf(seq, ",errors=%s", "panic");
2132
2133         return 0;
2134 }
2135
2136 static void default_options(struct f2fs_sb_info *sbi, bool remount)
2137 {
2138         /* init some FS parameters */
2139         if (!remount) {
2140                 set_opt(sbi, READ_EXTENT_CACHE);
2141                 clear_opt(sbi, DISABLE_CHECKPOINT);
2142
2143                 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2144                         set_opt(sbi, DISCARD);
2145
2146                 if (f2fs_sb_has_blkzoned(sbi))
2147                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2148                 else
2149                         F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2150         }
2151
2152         if (f2fs_sb_has_readonly(sbi))
2153                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2154         else
2155                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2156
2157         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2158         if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2159                                                         SMALL_VOLUME_SEGMENTS)
2160                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2161         else
2162                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2163         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2164         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2165         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2166         if (f2fs_sb_has_compression(sbi)) {
2167                 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2168                 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2169                 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2170                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2171         }
2172         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2173         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2174         F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
2175
2176         set_opt(sbi, INLINE_XATTR);
2177         set_opt(sbi, INLINE_DATA);
2178         set_opt(sbi, INLINE_DENTRY);
2179         set_opt(sbi, MERGE_CHECKPOINT);
2180         F2FS_OPTION(sbi).unusable_cap = 0;
2181         sbi->sb->s_flags |= SB_LAZYTIME;
2182         if (!f2fs_is_readonly(sbi))
2183                 set_opt(sbi, FLUSH_MERGE);
2184         if (f2fs_sb_has_blkzoned(sbi))
2185                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2186         else
2187                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2188
2189 #ifdef CONFIG_F2FS_FS_XATTR
2190         set_opt(sbi, XATTR_USER);
2191 #endif
2192 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2193         set_opt(sbi, POSIX_ACL);
2194 #endif
2195
2196         f2fs_build_fault_attr(sbi, 0, 0);
2197 }
2198
2199 #ifdef CONFIG_QUOTA
2200 static int f2fs_enable_quotas(struct super_block *sb);
2201 #endif
2202
2203 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2204 {
2205         unsigned int s_flags = sbi->sb->s_flags;
2206         struct cp_control cpc;
2207         unsigned int gc_mode = sbi->gc_mode;
2208         int err = 0;
2209         int ret;
2210         block_t unusable;
2211
2212         if (s_flags & SB_RDONLY) {
2213                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2214                 return -EINVAL;
2215         }
2216         sbi->sb->s_flags |= SB_ACTIVE;
2217
2218         /* check if we need more GC first */
2219         unusable = f2fs_get_unusable_blocks(sbi);
2220         if (!f2fs_disable_cp_again(sbi, unusable))
2221                 goto skip_gc;
2222
2223         f2fs_update_time(sbi, DISABLE_TIME);
2224
2225         sbi->gc_mode = GC_URGENT_HIGH;
2226
2227         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2228                 struct f2fs_gc_control gc_control = {
2229                         .victim_segno = NULL_SEGNO,
2230                         .init_gc_type = FG_GC,
2231                         .should_migrate_blocks = false,
2232                         .err_gc_skipped = true,
2233                         .no_bg_gc = true,
2234                         .nr_free_secs = 1 };
2235
2236                 f2fs_down_write(&sbi->gc_lock);
2237                 stat_inc_gc_call_count(sbi, FOREGROUND);
2238                 err = f2fs_gc(sbi, &gc_control);
2239                 if (err == -ENODATA) {
2240                         err = 0;
2241                         break;
2242                 }
2243                 if (err && err != -EAGAIN)
2244                         break;
2245         }
2246
2247         ret = sync_filesystem(sbi->sb);
2248         if (ret || err) {
2249                 err = ret ? ret : err;
2250                 goto restore_flag;
2251         }
2252
2253         unusable = f2fs_get_unusable_blocks(sbi);
2254         if (f2fs_disable_cp_again(sbi, unusable)) {
2255                 err = -EAGAIN;
2256                 goto restore_flag;
2257         }
2258
2259 skip_gc:
2260         f2fs_down_write(&sbi->gc_lock);
2261         cpc.reason = CP_PAUSE;
2262         set_sbi_flag(sbi, SBI_CP_DISABLED);
2263         stat_inc_cp_call_count(sbi, TOTAL_CALL);
2264         err = f2fs_write_checkpoint(sbi, &cpc);
2265         if (err)
2266                 goto out_unlock;
2267
2268         spin_lock(&sbi->stat_lock);
2269         sbi->unusable_block_count = unusable;
2270         spin_unlock(&sbi->stat_lock);
2271
2272 out_unlock:
2273         f2fs_up_write(&sbi->gc_lock);
2274 restore_flag:
2275         sbi->gc_mode = gc_mode;
2276         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2277         return err;
2278 }
2279
2280 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2281 {
2282         int retry = DEFAULT_RETRY_IO_COUNT;
2283
2284         /* we should flush all the data to keep data consistency */
2285         do {
2286                 sync_inodes_sb(sbi->sb);
2287                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2288         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2289
2290         if (unlikely(retry < 0))
2291                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2292
2293         f2fs_down_write(&sbi->gc_lock);
2294         f2fs_dirty_to_prefree(sbi);
2295
2296         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2297         set_sbi_flag(sbi, SBI_IS_DIRTY);
2298         f2fs_up_write(&sbi->gc_lock);
2299
2300         f2fs_sync_fs(sbi->sb, 1);
2301
2302         /* Let's ensure there's no pending checkpoint anymore */
2303         f2fs_flush_ckpt_thread(sbi);
2304 }
2305
2306 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2307 {
2308         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2309         struct f2fs_mount_info org_mount_opt;
2310         unsigned long old_sb_flags;
2311         int err;
2312         bool need_restart_gc = false, need_stop_gc = false;
2313         bool need_restart_flush = false, need_stop_flush = false;
2314         bool need_restart_discard = false, need_stop_discard = false;
2315         bool need_enable_checkpoint = false, need_disable_checkpoint = false;
2316         bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2317         bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2318         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2319         bool no_atgc = !test_opt(sbi, ATGC);
2320         bool no_discard = !test_opt(sbi, DISCARD);
2321         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2322         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2323 #ifdef CONFIG_QUOTA
2324         int i, j;
2325 #endif
2326
2327         /*
2328          * Save the old mount options in case we
2329          * need to restore them.
2330          */
2331         org_mount_opt = sbi->mount_opt;
2332         old_sb_flags = sb->s_flags;
2333
2334 #ifdef CONFIG_QUOTA
2335         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2336         for (i = 0; i < MAXQUOTAS; i++) {
2337                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2338                         org_mount_opt.s_qf_names[i] =
2339                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2340                                 GFP_KERNEL);
2341                         if (!org_mount_opt.s_qf_names[i]) {
2342                                 for (j = 0; j < i; j++)
2343                                         kfree(org_mount_opt.s_qf_names[j]);
2344                                 return -ENOMEM;
2345                         }
2346                 } else {
2347                         org_mount_opt.s_qf_names[i] = NULL;
2348                 }
2349         }
2350 #endif
2351
2352         /* recover superblocks we couldn't write due to previous RO mount */
2353         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2354                 err = f2fs_commit_super(sbi, false);
2355                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2356                           err);
2357                 if (!err)
2358                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2359         }
2360
2361         default_options(sbi, true);
2362
2363         /* parse mount options */
2364         err = parse_options(sb, data, true);
2365         if (err)
2366                 goto restore_opts;
2367
2368 #ifdef CONFIG_BLK_DEV_ZONED
2369         if (f2fs_sb_has_blkzoned(sbi) &&
2370                 sbi->max_open_zones < F2FS_OPTION(sbi).active_logs) {
2371                 f2fs_err(sbi,
2372                         "zoned: max open zones %u is too small, need at least %u open zones",
2373                                  sbi->max_open_zones, F2FS_OPTION(sbi).active_logs);
2374                 err = -EINVAL;
2375                 goto restore_opts;
2376         }
2377 #endif
2378
2379         /* flush outstanding errors before changing fs state */
2380         flush_work(&sbi->s_error_work);
2381
2382         /*
2383          * Previous and new state of filesystem is RO,
2384          * so skip checking GC and FLUSH_MERGE conditions.
2385          */
2386         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2387                 goto skip;
2388
2389         if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
2390                 err = -EROFS;
2391                 goto restore_opts;
2392         }
2393
2394 #ifdef CONFIG_QUOTA
2395         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2396                 err = dquot_suspend(sb, -1);
2397                 if (err < 0)
2398                         goto restore_opts;
2399         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2400                 /* dquot_resume needs RW */
2401                 sb->s_flags &= ~SB_RDONLY;
2402                 if (sb_any_quota_suspended(sb)) {
2403                         dquot_resume(sb, -1);
2404                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2405                         err = f2fs_enable_quotas(sb);
2406                         if (err)
2407                                 goto restore_opts;
2408                 }
2409         }
2410 #endif
2411         if (f2fs_lfs_mode(sbi) && !IS_F2FS_IPU_DISABLE(sbi)) {
2412                 err = -EINVAL;
2413                 f2fs_warn(sbi, "LFS is not compatible with IPU");
2414                 goto restore_opts;
2415         }
2416
2417         /* disallow enable atgc dynamically */
2418         if (no_atgc == !!test_opt(sbi, ATGC)) {
2419                 err = -EINVAL;
2420                 f2fs_warn(sbi, "switch atgc option is not allowed");
2421                 goto restore_opts;
2422         }
2423
2424         /* disallow enable/disable extent_cache dynamically */
2425         if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2426                 err = -EINVAL;
2427                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2428                 goto restore_opts;
2429         }
2430         /* disallow enable/disable age extent_cache dynamically */
2431         if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2432                 err = -EINVAL;
2433                 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2434                 goto restore_opts;
2435         }
2436
2437         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2438                 err = -EINVAL;
2439                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2440                 goto restore_opts;
2441         }
2442
2443         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2444                 err = -EINVAL;
2445                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2446                 goto restore_opts;
2447         }
2448
2449         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2450                 err = -EINVAL;
2451                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2452                 goto restore_opts;
2453         }
2454
2455         /*
2456          * We stop the GC thread if FS is mounted as RO
2457          * or if background_gc = off is passed in mount
2458          * option. Also sync the filesystem.
2459          */
2460         if ((*flags & SB_RDONLY) ||
2461                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2462                         !test_opt(sbi, GC_MERGE))) {
2463                 if (sbi->gc_thread) {
2464                         f2fs_stop_gc_thread(sbi);
2465                         need_restart_gc = true;
2466                 }
2467         } else if (!sbi->gc_thread) {
2468                 err = f2fs_start_gc_thread(sbi);
2469                 if (err)
2470                         goto restore_opts;
2471                 need_stop_gc = true;
2472         }
2473
2474         if (*flags & SB_RDONLY) {
2475                 sync_inodes_sb(sb);
2476
2477                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2478                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2479                 f2fs_sync_fs(sb, 1);
2480                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2481         }
2482
2483         /*
2484          * We stop issue flush thread if FS is mounted as RO
2485          * or if flush_merge is not passed in mount option.
2486          */
2487         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2488                 clear_opt(sbi, FLUSH_MERGE);
2489                 f2fs_destroy_flush_cmd_control(sbi, false);
2490                 need_restart_flush = true;
2491         } else {
2492                 err = f2fs_create_flush_cmd_control(sbi);
2493                 if (err)
2494                         goto restore_gc;
2495                 need_stop_flush = true;
2496         }
2497
2498         if (no_discard == !!test_opt(sbi, DISCARD)) {
2499                 if (test_opt(sbi, DISCARD)) {
2500                         err = f2fs_start_discard_thread(sbi);
2501                         if (err)
2502                                 goto restore_flush;
2503                         need_stop_discard = true;
2504                 } else {
2505                         f2fs_stop_discard_thread(sbi);
2506                         f2fs_issue_discard_timeout(sbi);
2507                         need_restart_discard = true;
2508                 }
2509         }
2510
2511         adjust_unusable_cap_perc(sbi);
2512         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2513                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2514                         err = f2fs_disable_checkpoint(sbi);
2515                         if (err)
2516                                 goto restore_discard;
2517                         need_enable_checkpoint = true;
2518                 } else {
2519                         f2fs_enable_checkpoint(sbi);
2520                         need_disable_checkpoint = true;
2521                 }
2522         }
2523
2524         /*
2525          * Place this routine at the end, since a new checkpoint would be
2526          * triggered while remount and we need to take care of it before
2527          * returning from remount.
2528          */
2529         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2530                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2531                 f2fs_stop_ckpt_thread(sbi);
2532         } else {
2533                 /* Flush if the prevous checkpoint, if exists. */
2534                 f2fs_flush_ckpt_thread(sbi);
2535
2536                 err = f2fs_start_ckpt_thread(sbi);
2537                 if (err) {
2538                         f2fs_err(sbi,
2539                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2540                             err);
2541                         goto restore_checkpoint;
2542                 }
2543         }
2544
2545 skip:
2546 #ifdef CONFIG_QUOTA
2547         /* Release old quota file names */
2548         for (i = 0; i < MAXQUOTAS; i++)
2549                 kfree(org_mount_opt.s_qf_names[i]);
2550 #endif
2551         /* Update the POSIXACL Flag */
2552         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2553                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2554
2555         limit_reserve_root(sbi);
2556         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2557         return 0;
2558 restore_checkpoint:
2559         if (need_enable_checkpoint) {
2560                 f2fs_enable_checkpoint(sbi);
2561         } else if (need_disable_checkpoint) {
2562                 if (f2fs_disable_checkpoint(sbi))
2563                         f2fs_warn(sbi, "checkpoint has not been disabled");
2564         }
2565 restore_discard:
2566         if (need_restart_discard) {
2567                 if (f2fs_start_discard_thread(sbi))
2568                         f2fs_warn(sbi, "discard has been stopped");
2569         } else if (need_stop_discard) {
2570                 f2fs_stop_discard_thread(sbi);
2571         }
2572 restore_flush:
2573         if (need_restart_flush) {
2574                 if (f2fs_create_flush_cmd_control(sbi))
2575                         f2fs_warn(sbi, "background flush thread has stopped");
2576         } else if (need_stop_flush) {
2577                 clear_opt(sbi, FLUSH_MERGE);
2578                 f2fs_destroy_flush_cmd_control(sbi, false);
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 static void f2fs_shutdown(struct super_block *sb)
2601 {
2602         f2fs_do_shutdown(F2FS_SB(sb), F2FS_GOING_DOWN_NOSYNC, false, false);
2603 }
2604
2605 #ifdef CONFIG_QUOTA
2606 static bool f2fs_need_recovery(struct f2fs_sb_info *sbi)
2607 {
2608         /* need to recovery orphan */
2609         if (is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
2610                 return true;
2611         /* need to recovery data */
2612         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2613                 return false;
2614         if (test_opt(sbi, NORECOVERY))
2615                 return false;
2616         return !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG);
2617 }
2618
2619 static bool f2fs_recover_quota_begin(struct f2fs_sb_info *sbi)
2620 {
2621         bool readonly = f2fs_readonly(sbi->sb);
2622
2623         if (!f2fs_need_recovery(sbi))
2624                 return false;
2625
2626         /* it doesn't need to check f2fs_sb_has_readonly() */
2627         if (f2fs_hw_is_readonly(sbi))
2628                 return false;
2629
2630         if (readonly) {
2631                 sbi->sb->s_flags &= ~SB_RDONLY;
2632                 set_sbi_flag(sbi, SBI_IS_WRITABLE);
2633         }
2634
2635         /*
2636          * Turn on quotas which were not enabled for read-only mounts if
2637          * filesystem has quota feature, so that they are updated correctly.
2638          */
2639         return f2fs_enable_quota_files(sbi, readonly);
2640 }
2641
2642 static void f2fs_recover_quota_end(struct f2fs_sb_info *sbi,
2643                                                 bool quota_enabled)
2644 {
2645         if (quota_enabled)
2646                 f2fs_quota_off_umount(sbi->sb);
2647
2648         if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE)) {
2649                 clear_sbi_flag(sbi, SBI_IS_WRITABLE);
2650                 sbi->sb->s_flags |= SB_RDONLY;
2651         }
2652 }
2653
2654 /* Read data from quotafile */
2655 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2656                                size_t len, loff_t off)
2657 {
2658         struct inode *inode = sb_dqopt(sb)->files[type];
2659         struct address_space *mapping = inode->i_mapping;
2660         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2661         int offset = off & (sb->s_blocksize - 1);
2662         int tocopy;
2663         size_t toread;
2664         loff_t i_size = i_size_read(inode);
2665         struct page *page;
2666
2667         if (off > i_size)
2668                 return 0;
2669
2670         if (off + len > i_size)
2671                 len = i_size - off;
2672         toread = len;
2673         while (toread > 0) {
2674                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2675 repeat:
2676                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2677                 if (IS_ERR(page)) {
2678                         if (PTR_ERR(page) == -ENOMEM) {
2679                                 memalloc_retry_wait(GFP_NOFS);
2680                                 goto repeat;
2681                         }
2682                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2683                         return PTR_ERR(page);
2684                 }
2685
2686                 lock_page(page);
2687
2688                 if (unlikely(page->mapping != mapping)) {
2689                         f2fs_put_page(page, 1);
2690                         goto repeat;
2691                 }
2692                 if (unlikely(!PageUptodate(page))) {
2693                         f2fs_put_page(page, 1);
2694                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2695                         return -EIO;
2696                 }
2697
2698                 memcpy_from_page(data, page, offset, tocopy);
2699                 f2fs_put_page(page, 1);
2700
2701                 offset = 0;
2702                 toread -= tocopy;
2703                 data += tocopy;
2704                 blkidx++;
2705         }
2706         return len;
2707 }
2708
2709 /* Write to quotafile */
2710 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2711                                 const char *data, size_t len, loff_t off)
2712 {
2713         struct inode *inode = sb_dqopt(sb)->files[type];
2714         struct address_space *mapping = inode->i_mapping;
2715         const struct address_space_operations *a_ops = mapping->a_ops;
2716         int offset = off & (sb->s_blocksize - 1);
2717         size_t towrite = len;
2718         struct folio *folio;
2719         void *fsdata = NULL;
2720         int err = 0;
2721         int tocopy;
2722
2723         while (towrite > 0) {
2724                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2725                                                                 towrite);
2726 retry:
2727                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2728                                                         &folio, &fsdata);
2729                 if (unlikely(err)) {
2730                         if (err == -ENOMEM) {
2731                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2732                                 goto retry;
2733                         }
2734                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2735                         break;
2736                 }
2737
2738                 memcpy_to_folio(folio, offset_in_folio(folio, off), data, tocopy);
2739
2740                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2741                                                 folio, fsdata);
2742                 offset = 0;
2743                 towrite -= tocopy;
2744                 off += tocopy;
2745                 data += tocopy;
2746                 cond_resched();
2747         }
2748
2749         if (len == towrite)
2750                 return err;
2751         inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
2752         f2fs_mark_inode_dirty_sync(inode, false);
2753         return len - towrite;
2754 }
2755
2756 int f2fs_dquot_initialize(struct inode *inode)
2757 {
2758         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT))
2759                 return -ESRCH;
2760
2761         return dquot_initialize(inode);
2762 }
2763
2764 static struct dquot __rcu **f2fs_get_dquots(struct inode *inode)
2765 {
2766         return F2FS_I(inode)->i_dquot;
2767 }
2768
2769 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2770 {
2771         return &F2FS_I(inode)->i_reserved_quota;
2772 }
2773
2774 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2775 {
2776         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2777                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2778                 return 0;
2779         }
2780
2781         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2782                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2783 }
2784
2785 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2786 {
2787         int enabled = 0;
2788         int i, err;
2789
2790         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2791                 err = f2fs_enable_quotas(sbi->sb);
2792                 if (err) {
2793                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2794                         return 0;
2795                 }
2796                 return 1;
2797         }
2798
2799         for (i = 0; i < MAXQUOTAS; i++) {
2800                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2801                         err = f2fs_quota_on_mount(sbi, i);
2802                         if (!err) {
2803                                 enabled = 1;
2804                                 continue;
2805                         }
2806                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2807                                  err, i);
2808                 }
2809         }
2810         return enabled;
2811 }
2812
2813 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2814                              unsigned int flags)
2815 {
2816         struct inode *qf_inode;
2817         unsigned long qf_inum;
2818         unsigned long qf_flag = F2FS_QUOTA_DEFAULT_FL;
2819         int err;
2820
2821         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2822
2823         qf_inum = f2fs_qf_ino(sb, type);
2824         if (!qf_inum)
2825                 return -EPERM;
2826
2827         qf_inode = f2fs_iget(sb, qf_inum);
2828         if (IS_ERR(qf_inode)) {
2829                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2830                 return PTR_ERR(qf_inode);
2831         }
2832
2833         /* Don't account quota for quota files to avoid recursion */
2834         inode_lock(qf_inode);
2835         qf_inode->i_flags |= S_NOQUOTA;
2836
2837         if ((F2FS_I(qf_inode)->i_flags & qf_flag) != qf_flag) {
2838                 F2FS_I(qf_inode)->i_flags |= qf_flag;
2839                 f2fs_set_inode_flags(qf_inode);
2840         }
2841         inode_unlock(qf_inode);
2842
2843         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2844         iput(qf_inode);
2845         return err;
2846 }
2847
2848 static int f2fs_enable_quotas(struct super_block *sb)
2849 {
2850         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2851         int type, err = 0;
2852         unsigned long qf_inum;
2853         bool quota_mopt[MAXQUOTAS] = {
2854                 test_opt(sbi, USRQUOTA),
2855                 test_opt(sbi, GRPQUOTA),
2856                 test_opt(sbi, PRJQUOTA),
2857         };
2858
2859         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2860                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2861                 return 0;
2862         }
2863
2864         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2865
2866         for (type = 0; type < MAXQUOTAS; type++) {
2867                 qf_inum = f2fs_qf_ino(sb, type);
2868                 if (qf_inum) {
2869                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2870                                 DQUOT_USAGE_ENABLED |
2871                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2872                         if (err) {
2873                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2874                                          type, err);
2875                                 for (type--; type >= 0; type--)
2876                                         dquot_quota_off(sb, type);
2877                                 set_sbi_flag(F2FS_SB(sb),
2878                                                 SBI_QUOTA_NEED_REPAIR);
2879                                 return err;
2880                         }
2881                 }
2882         }
2883         return 0;
2884 }
2885
2886 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2887 {
2888         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2889         struct address_space *mapping = dqopt->files[type]->i_mapping;
2890         int ret = 0;
2891
2892         ret = dquot_writeback_dquots(sbi->sb, type);
2893         if (ret)
2894                 goto out;
2895
2896         ret = filemap_fdatawrite(mapping);
2897         if (ret)
2898                 goto out;
2899
2900         /* if we are using journalled quota */
2901         if (is_journalled_quota(sbi))
2902                 goto out;
2903
2904         ret = filemap_fdatawait(mapping);
2905
2906         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2907 out:
2908         if (ret)
2909                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2910         return ret;
2911 }
2912
2913 int f2fs_quota_sync(struct super_block *sb, int type)
2914 {
2915         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2916         struct quota_info *dqopt = sb_dqopt(sb);
2917         int cnt;
2918         int ret = 0;
2919
2920         /*
2921          * Now when everything is written we can discard the pagecache so
2922          * that userspace sees the changes.
2923          */
2924         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2925
2926                 if (type != -1 && cnt != type)
2927                         continue;
2928
2929                 if (!sb_has_quota_active(sb, cnt))
2930                         continue;
2931
2932                 if (!f2fs_sb_has_quota_ino(sbi))
2933                         inode_lock(dqopt->files[cnt]);
2934
2935                 /*
2936                  * do_quotactl
2937                  *  f2fs_quota_sync
2938                  *  f2fs_down_read(quota_sem)
2939                  *  dquot_writeback_dquots()
2940                  *  f2fs_dquot_commit
2941                  *                            block_operation
2942                  *                            f2fs_down_read(quota_sem)
2943                  */
2944                 f2fs_lock_op(sbi);
2945                 f2fs_down_read(&sbi->quota_sem);
2946
2947                 ret = f2fs_quota_sync_file(sbi, cnt);
2948
2949                 f2fs_up_read(&sbi->quota_sem);
2950                 f2fs_unlock_op(sbi);
2951
2952                 if (!f2fs_sb_has_quota_ino(sbi))
2953                         inode_unlock(dqopt->files[cnt]);
2954
2955                 if (ret)
2956                         break;
2957         }
2958         return ret;
2959 }
2960
2961 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2962                                                         const struct path *path)
2963 {
2964         struct inode *inode;
2965         int err;
2966
2967         /* if quota sysfile exists, deny enabling quota with specific file */
2968         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2969                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2970                 return -EBUSY;
2971         }
2972
2973         if (path->dentry->d_sb != sb)
2974                 return -EXDEV;
2975
2976         err = f2fs_quota_sync(sb, type);
2977         if (err)
2978                 return err;
2979
2980         inode = d_inode(path->dentry);
2981
2982         err = filemap_fdatawrite(inode->i_mapping);
2983         if (err)
2984                 return err;
2985
2986         err = filemap_fdatawait(inode->i_mapping);
2987         if (err)
2988                 return err;
2989
2990         err = dquot_quota_on(sb, type, format_id, path);
2991         if (err)
2992                 return err;
2993
2994         inode_lock(inode);
2995         F2FS_I(inode)->i_flags |= F2FS_QUOTA_DEFAULT_FL;
2996         f2fs_set_inode_flags(inode);
2997         inode_unlock(inode);
2998         f2fs_mark_inode_dirty_sync(inode, false);
2999
3000         return 0;
3001 }
3002
3003 static int __f2fs_quota_off(struct super_block *sb, int type)
3004 {
3005         struct inode *inode = sb_dqopt(sb)->files[type];
3006         int err;
3007
3008         if (!inode || !igrab(inode))
3009                 return dquot_quota_off(sb, type);
3010
3011         err = f2fs_quota_sync(sb, type);
3012         if (err)
3013                 goto out_put;
3014
3015         err = dquot_quota_off(sb, type);
3016         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
3017                 goto out_put;
3018
3019         inode_lock(inode);
3020         F2FS_I(inode)->i_flags &= ~F2FS_QUOTA_DEFAULT_FL;
3021         f2fs_set_inode_flags(inode);
3022         inode_unlock(inode);
3023         f2fs_mark_inode_dirty_sync(inode, false);
3024 out_put:
3025         iput(inode);
3026         return err;
3027 }
3028
3029 static int f2fs_quota_off(struct super_block *sb, int type)
3030 {
3031         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3032         int err;
3033
3034         err = __f2fs_quota_off(sb, type);
3035
3036         /*
3037          * quotactl can shutdown journalled quota, result in inconsistence
3038          * between quota record and fs data by following updates, tag the
3039          * flag to let fsck be aware of it.
3040          */
3041         if (is_journalled_quota(sbi))
3042                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3043         return err;
3044 }
3045
3046 void f2fs_quota_off_umount(struct super_block *sb)
3047 {
3048         int type;
3049         int err;
3050
3051         for (type = 0; type < MAXQUOTAS; type++) {
3052                 err = __f2fs_quota_off(sb, type);
3053                 if (err) {
3054                         int ret = dquot_quota_off(sb, type);
3055
3056                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
3057                                  type, err, ret);
3058                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
3059                 }
3060         }
3061         /*
3062          * In case of checkpoint=disable, we must flush quota blocks.
3063          * This can cause NULL exception for node_inode in end_io, since
3064          * put_super already dropped it.
3065          */
3066         sync_filesystem(sb);
3067 }
3068
3069 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
3070 {
3071         struct quota_info *dqopt = sb_dqopt(sb);
3072         int type;
3073
3074         for (type = 0; type < MAXQUOTAS; type++) {
3075                 if (!dqopt->files[type])
3076                         continue;
3077                 f2fs_inode_synced(dqopt->files[type]);
3078         }
3079 }
3080
3081 static int f2fs_dquot_commit(struct dquot *dquot)
3082 {
3083         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3084         int ret;
3085
3086         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
3087         ret = dquot_commit(dquot);
3088         if (ret < 0)
3089                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3090         f2fs_up_read(&sbi->quota_sem);
3091         return ret;
3092 }
3093
3094 static int f2fs_dquot_acquire(struct dquot *dquot)
3095 {
3096         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3097         int ret;
3098
3099         f2fs_down_read(&sbi->quota_sem);
3100         ret = dquot_acquire(dquot);
3101         if (ret < 0)
3102                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3103         f2fs_up_read(&sbi->quota_sem);
3104         return ret;
3105 }
3106
3107 static int f2fs_dquot_release(struct dquot *dquot)
3108 {
3109         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
3110         int ret = dquot_release(dquot);
3111
3112         if (ret < 0)
3113                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3114         return ret;
3115 }
3116
3117 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
3118 {
3119         struct super_block *sb = dquot->dq_sb;
3120         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3121         int ret = dquot_mark_dquot_dirty(dquot);
3122
3123         /* if we are using journalled quota */
3124         if (is_journalled_quota(sbi))
3125                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
3126
3127         return ret;
3128 }
3129
3130 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
3131 {
3132         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3133         int ret = dquot_commit_info(sb, type);
3134
3135         if (ret < 0)
3136                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3137         return ret;
3138 }
3139
3140 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
3141 {
3142         *projid = F2FS_I(inode)->i_projid;
3143         return 0;
3144 }
3145
3146 static const struct dquot_operations f2fs_quota_operations = {
3147         .get_reserved_space = f2fs_get_reserved_space,
3148         .write_dquot    = f2fs_dquot_commit,
3149         .acquire_dquot  = f2fs_dquot_acquire,
3150         .release_dquot  = f2fs_dquot_release,
3151         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
3152         .write_info     = f2fs_dquot_commit_info,
3153         .alloc_dquot    = dquot_alloc,
3154         .destroy_dquot  = dquot_destroy,
3155         .get_projid     = f2fs_get_projid,
3156         .get_next_id    = dquot_get_next_id,
3157 };
3158
3159 static const struct quotactl_ops f2fs_quotactl_ops = {
3160         .quota_on       = f2fs_quota_on,
3161         .quota_off      = f2fs_quota_off,
3162         .quota_sync     = f2fs_quota_sync,
3163         .get_state      = dquot_get_state,
3164         .set_info       = dquot_set_dqinfo,
3165         .get_dqblk      = dquot_get_dqblk,
3166         .set_dqblk      = dquot_set_dqblk,
3167         .get_nextdqblk  = dquot_get_next_dqblk,
3168 };
3169 #else
3170 int f2fs_dquot_initialize(struct inode *inode)
3171 {
3172         return 0;
3173 }
3174
3175 int f2fs_quota_sync(struct super_block *sb, int type)
3176 {
3177         return 0;
3178 }
3179
3180 void f2fs_quota_off_umount(struct super_block *sb)
3181 {
3182 }
3183 #endif
3184
3185 static const struct super_operations f2fs_sops = {
3186         .alloc_inode    = f2fs_alloc_inode,
3187         .free_inode     = f2fs_free_inode,
3188         .drop_inode     = f2fs_drop_inode,
3189         .write_inode    = f2fs_write_inode,
3190         .dirty_inode    = f2fs_dirty_inode,
3191         .show_options   = f2fs_show_options,
3192 #ifdef CONFIG_QUOTA
3193         .quota_read     = f2fs_quota_read,
3194         .quota_write    = f2fs_quota_write,
3195         .get_dquots     = f2fs_get_dquots,
3196 #endif
3197         .evict_inode    = f2fs_evict_inode,
3198         .put_super      = f2fs_put_super,
3199         .sync_fs        = f2fs_sync_fs,
3200         .freeze_fs      = f2fs_freeze,
3201         .unfreeze_fs    = f2fs_unfreeze,
3202         .statfs         = f2fs_statfs,
3203         .remount_fs     = f2fs_remount,
3204         .shutdown       = f2fs_shutdown,
3205 };
3206
3207 #ifdef CONFIG_FS_ENCRYPTION
3208 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3209 {
3210         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3211                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3212                                 ctx, len, NULL);
3213 }
3214
3215 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3216                                                         void *fs_data)
3217 {
3218         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3219
3220         /*
3221          * Encrypting the root directory is not allowed because fsck
3222          * expects lost+found directory to exist and remain unencrypted
3223          * if LOST_FOUND feature is enabled.
3224          *
3225          */
3226         if (f2fs_sb_has_lost_found(sbi) &&
3227                         inode->i_ino == F2FS_ROOT_INO(sbi))
3228                 return -EPERM;
3229
3230         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3231                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3232                                 ctx, len, fs_data, XATTR_CREATE);
3233 }
3234
3235 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3236 {
3237         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3238 }
3239
3240 static bool f2fs_has_stable_inodes(struct super_block *sb)
3241 {
3242         return true;
3243 }
3244
3245 static struct block_device **f2fs_get_devices(struct super_block *sb,
3246                                               unsigned int *num_devs)
3247 {
3248         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3249         struct block_device **devs;
3250         int i;
3251
3252         if (!f2fs_is_multi_device(sbi))
3253                 return NULL;
3254
3255         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3256         if (!devs)
3257                 return ERR_PTR(-ENOMEM);
3258
3259         for (i = 0; i < sbi->s_ndevs; i++)
3260                 devs[i] = FDEV(i).bdev;
3261         *num_devs = sbi->s_ndevs;
3262         return devs;
3263 }
3264
3265 static const struct fscrypt_operations f2fs_cryptops = {
3266         .needs_bounce_pages     = 1,
3267         .has_32bit_inodes       = 1,
3268         .supports_subblock_data_units = 1,
3269         .legacy_key_prefix      = "f2fs:",
3270         .get_context            = f2fs_get_context,
3271         .set_context            = f2fs_set_context,
3272         .get_dummy_policy       = f2fs_get_dummy_policy,
3273         .empty_dir              = f2fs_empty_dir,
3274         .has_stable_inodes      = f2fs_has_stable_inodes,
3275         .get_devices            = f2fs_get_devices,
3276 };
3277 #endif
3278
3279 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3280                 u64 ino, u32 generation)
3281 {
3282         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3283         struct inode *inode;
3284
3285         if (f2fs_check_nid_range(sbi, ino))
3286                 return ERR_PTR(-ESTALE);
3287
3288         /*
3289          * f2fs_iget isn't quite right if the inode is currently unallocated!
3290          * However f2fs_iget currently does appropriate checks to handle stale
3291          * inodes so everything is OK.
3292          */
3293         inode = f2fs_iget(sb, ino);
3294         if (IS_ERR(inode))
3295                 return ERR_CAST(inode);
3296         if (unlikely(generation && inode->i_generation != generation)) {
3297                 /* we didn't find the right inode.. */
3298                 iput(inode);
3299                 return ERR_PTR(-ESTALE);
3300         }
3301         return inode;
3302 }
3303
3304 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3305                 int fh_len, int fh_type)
3306 {
3307         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3308                                     f2fs_nfs_get_inode);
3309 }
3310
3311 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3312                 int fh_len, int fh_type)
3313 {
3314         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3315                                     f2fs_nfs_get_inode);
3316 }
3317
3318 static const struct export_operations f2fs_export_ops = {
3319         .encode_fh = generic_encode_ino32_fh,
3320         .fh_to_dentry = f2fs_fh_to_dentry,
3321         .fh_to_parent = f2fs_fh_to_parent,
3322         .get_parent = f2fs_get_parent,
3323 };
3324
3325 loff_t max_file_blocks(struct inode *inode)
3326 {
3327         loff_t result = 0;
3328         loff_t leaf_count;
3329
3330         /*
3331          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3332          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3333          * space in inode.i_addr, it will be more safe to reassign
3334          * result as zero.
3335          */
3336
3337         if (inode && f2fs_compressed_file(inode))
3338                 leaf_count = ADDRS_PER_BLOCK(inode);
3339         else
3340                 leaf_count = DEF_ADDRS_PER_BLOCK;
3341
3342         /* two direct node blocks */
3343         result += (leaf_count * 2);
3344
3345         /* two indirect node blocks */
3346         leaf_count *= NIDS_PER_BLOCK;
3347         result += (leaf_count * 2);
3348
3349         /* one double indirect node block */
3350         leaf_count *= NIDS_PER_BLOCK;
3351         result += leaf_count;
3352
3353         /*
3354          * For compatibility with FSCRYPT_POLICY_FLAG_IV_INO_LBLK_{64,32} with
3355          * a 4K crypto data unit, we must restrict the max filesize to what can
3356          * fit within U32_MAX + 1 data units.
3357          */
3358
3359         result = umin(result, F2FS_BYTES_TO_BLK(((loff_t)U32_MAX + 1) * 4096));
3360
3361         return result;
3362 }
3363
3364 static int __f2fs_commit_super(struct f2fs_sb_info *sbi, struct folio *folio,
3365                                                 pgoff_t index, bool update)
3366 {
3367         struct bio *bio;
3368         /* it's rare case, we can do fua all the time */
3369         blk_opf_t opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA;
3370         int ret;
3371
3372         folio_lock(folio);
3373         folio_wait_writeback(folio);
3374         if (update)
3375                 memcpy(F2FS_SUPER_BLOCK(folio, index), F2FS_RAW_SUPER(sbi),
3376                                         sizeof(struct f2fs_super_block));
3377         folio_mark_dirty(folio);
3378         folio_clear_dirty_for_io(folio);
3379         folio_start_writeback(folio);
3380         folio_unlock(folio);
3381
3382         bio = bio_alloc(sbi->sb->s_bdev, 1, opf, GFP_NOFS);
3383
3384         /* it doesn't need to set crypto context for superblock update */
3385         bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(folio_index(folio));
3386
3387         if (!bio_add_folio(bio, folio, folio_size(folio), 0))
3388                 f2fs_bug_on(sbi, 1);
3389
3390         ret = submit_bio_wait(bio);
3391         folio_end_writeback(folio);
3392
3393         return ret;
3394 }
3395
3396 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3397                                         struct folio *folio, pgoff_t index)
3398 {
3399         struct f2fs_super_block *raw_super = F2FS_SUPER_BLOCK(folio, index);
3400         struct super_block *sb = sbi->sb;
3401         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3402         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3403         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3404         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3405         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3406         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3407         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3408         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3409         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3410         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3411         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3412         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3413         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3414         u64 main_end_blkaddr = main_blkaddr +
3415                                 ((u64)segment_count_main << log_blocks_per_seg);
3416         u64 seg_end_blkaddr = segment0_blkaddr +
3417                                 ((u64)segment_count << log_blocks_per_seg);
3418
3419         if (segment0_blkaddr != cp_blkaddr) {
3420                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3421                           segment0_blkaddr, cp_blkaddr);
3422                 return true;
3423         }
3424
3425         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3426                                                         sit_blkaddr) {
3427                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3428                           cp_blkaddr, sit_blkaddr,
3429                           segment_count_ckpt << log_blocks_per_seg);
3430                 return true;
3431         }
3432
3433         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3434                                                         nat_blkaddr) {
3435                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3436                           sit_blkaddr, nat_blkaddr,
3437                           segment_count_sit << log_blocks_per_seg);
3438                 return true;
3439         }
3440
3441         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3442                                                         ssa_blkaddr) {
3443                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3444                           nat_blkaddr, ssa_blkaddr,
3445                           segment_count_nat << log_blocks_per_seg);
3446                 return true;
3447         }
3448
3449         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3450                                                         main_blkaddr) {
3451                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3452                           ssa_blkaddr, main_blkaddr,
3453                           segment_count_ssa << log_blocks_per_seg);
3454                 return true;
3455         }
3456
3457         if (main_end_blkaddr > seg_end_blkaddr) {
3458                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3459                           main_blkaddr, seg_end_blkaddr,
3460                           segment_count_main << log_blocks_per_seg);
3461                 return true;
3462         } else if (main_end_blkaddr < seg_end_blkaddr) {
3463                 int err = 0;
3464                 char *res;
3465
3466                 /* fix in-memory information all the time */
3467                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3468                                 segment0_blkaddr) >> log_blocks_per_seg);
3469
3470                 if (f2fs_readonly(sb) || f2fs_hw_is_readonly(sbi)) {
3471                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3472                         res = "internally";
3473                 } else {
3474                         err = __f2fs_commit_super(sbi, folio, index, false);
3475                         res = err ? "failed" : "done";
3476                 }
3477                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3478                           res, main_blkaddr, seg_end_blkaddr,
3479                           segment_count_main << log_blocks_per_seg);
3480                 if (err)
3481                         return true;
3482         }
3483         return false;
3484 }
3485
3486 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3487                                         struct folio *folio, pgoff_t index)
3488 {
3489         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3490         block_t total_sections, blocks_per_seg;
3491         struct f2fs_super_block *raw_super = F2FS_SUPER_BLOCK(folio, index);
3492         size_t crc_offset = 0;
3493         __u32 crc = 0;
3494
3495         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3496                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3497                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3498                 return -EINVAL;
3499         }
3500
3501         /* Check checksum_offset and crc in superblock */
3502         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3503                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3504                 if (crc_offset !=
3505                         offsetof(struct f2fs_super_block, crc)) {
3506                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3507                                   crc_offset);
3508                         return -EFSCORRUPTED;
3509                 }
3510                 crc = le32_to_cpu(raw_super->crc);
3511                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3512                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3513                         return -EFSCORRUPTED;
3514                 }
3515         }
3516
3517         /* only support block_size equals to PAGE_SIZE */
3518         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3519                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3520                           le32_to_cpu(raw_super->log_blocksize),
3521                           F2FS_BLKSIZE_BITS);
3522                 return -EFSCORRUPTED;
3523         }
3524
3525         /* check log blocks per segment */
3526         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3527                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3528                           le32_to_cpu(raw_super->log_blocks_per_seg));
3529                 return -EFSCORRUPTED;
3530         }
3531
3532         /* Currently, support 512/1024/2048/4096/16K bytes sector size */
3533         if (le32_to_cpu(raw_super->log_sectorsize) >
3534                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3535                 le32_to_cpu(raw_super->log_sectorsize) <
3536                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3537                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3538                           le32_to_cpu(raw_super->log_sectorsize));
3539                 return -EFSCORRUPTED;
3540         }
3541         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3542                 le32_to_cpu(raw_super->log_sectorsize) !=
3543                         F2FS_MAX_LOG_SECTOR_SIZE) {
3544                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3545                           le32_to_cpu(raw_super->log_sectors_per_block),
3546                           le32_to_cpu(raw_super->log_sectorsize));
3547                 return -EFSCORRUPTED;
3548         }
3549
3550         segment_count = le32_to_cpu(raw_super->segment_count);
3551         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3552         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3553         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3554         total_sections = le32_to_cpu(raw_super->section_count);
3555
3556         /* blocks_per_seg should be 512, given the above check */
3557         blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg));
3558
3559         if (segment_count > F2FS_MAX_SEGMENT ||
3560                                 segment_count < F2FS_MIN_SEGMENTS) {
3561                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3562                 return -EFSCORRUPTED;
3563         }
3564
3565         if (total_sections > segment_count_main || total_sections < 1 ||
3566                         segs_per_sec > segment_count || !segs_per_sec) {
3567                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3568                           segment_count, total_sections, segs_per_sec);
3569                 return -EFSCORRUPTED;
3570         }
3571
3572         if (segment_count_main != total_sections * segs_per_sec) {
3573                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3574                           segment_count_main, total_sections, segs_per_sec);
3575                 return -EFSCORRUPTED;
3576         }
3577
3578         if ((segment_count / segs_per_sec) < total_sections) {
3579                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3580                           segment_count, segs_per_sec, total_sections);
3581                 return -EFSCORRUPTED;
3582         }
3583
3584         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3585                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3586                           segment_count, le64_to_cpu(raw_super->block_count));
3587                 return -EFSCORRUPTED;
3588         }
3589
3590         if (RDEV(0).path[0]) {
3591                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3592                 int i = 1;
3593
3594                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3595                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3596                         i++;
3597                 }
3598                 if (segment_count != dev_seg_count) {
3599                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3600                                         segment_count, dev_seg_count);
3601                         return -EFSCORRUPTED;
3602                 }
3603         } else {
3604                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3605                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3606                         f2fs_info(sbi, "Zoned block device path is missing");
3607                         return -EFSCORRUPTED;
3608                 }
3609         }
3610
3611         if (secs_per_zone > total_sections || !secs_per_zone) {
3612                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3613                           secs_per_zone, total_sections);
3614                 return -EFSCORRUPTED;
3615         }
3616         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3617                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3618                         (le32_to_cpu(raw_super->extension_count) +
3619                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3620                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3621                           le32_to_cpu(raw_super->extension_count),
3622                           raw_super->hot_ext_count,
3623                           F2FS_MAX_EXTENSION);
3624                 return -EFSCORRUPTED;
3625         }
3626
3627         if (le32_to_cpu(raw_super->cp_payload) >=
3628                                 (blocks_per_seg - F2FS_CP_PACKS -
3629                                 NR_CURSEG_PERSIST_TYPE)) {
3630                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3631                           le32_to_cpu(raw_super->cp_payload),
3632                           blocks_per_seg - F2FS_CP_PACKS -
3633                           NR_CURSEG_PERSIST_TYPE);
3634                 return -EFSCORRUPTED;
3635         }
3636
3637         /* check reserved ino info */
3638         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3639                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3640                 le32_to_cpu(raw_super->root_ino) != 3) {
3641                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3642                           le32_to_cpu(raw_super->node_ino),
3643                           le32_to_cpu(raw_super->meta_ino),
3644                           le32_to_cpu(raw_super->root_ino));
3645                 return -EFSCORRUPTED;
3646         }
3647
3648         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3649         if (sanity_check_area_boundary(sbi, folio, index))
3650                 return -EFSCORRUPTED;
3651
3652         return 0;
3653 }
3654
3655 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3656 {
3657         unsigned int total, fsmeta;
3658         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3659         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3660         unsigned int ovp_segments, reserved_segments;
3661         unsigned int main_segs, blocks_per_seg;
3662         unsigned int sit_segs, nat_segs;
3663         unsigned int sit_bitmap_size, nat_bitmap_size;
3664         unsigned int log_blocks_per_seg;
3665         unsigned int segment_count_main;
3666         unsigned int cp_pack_start_sum, cp_payload;
3667         block_t user_block_count, valid_user_blocks;
3668         block_t avail_node_count, valid_node_count;
3669         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3670         int i, j;
3671
3672         total = le32_to_cpu(raw_super->segment_count);
3673         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3674         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3675         fsmeta += sit_segs;
3676         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3677         fsmeta += nat_segs;
3678         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3679         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3680
3681         if (unlikely(fsmeta >= total))
3682                 return 1;
3683
3684         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3685         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3686
3687         if (!f2fs_sb_has_readonly(sbi) &&
3688                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3689                         ovp_segments == 0 || reserved_segments == 0)) {
3690                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3691                 return 1;
3692         }
3693         user_block_count = le64_to_cpu(ckpt->user_block_count);
3694         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3695                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3696         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3697         if (!user_block_count || user_block_count >=
3698                         segment_count_main << log_blocks_per_seg) {
3699                 f2fs_err(sbi, "Wrong user_block_count: %u",
3700                          user_block_count);
3701                 return 1;
3702         }
3703
3704         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3705         if (valid_user_blocks > user_block_count) {
3706                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3707                          valid_user_blocks, user_block_count);
3708                 return 1;
3709         }
3710
3711         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3712         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3713         if (valid_node_count > avail_node_count) {
3714                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3715                          valid_node_count, avail_node_count);
3716                 return 1;
3717         }
3718
3719         main_segs = le32_to_cpu(raw_super->segment_count_main);
3720         blocks_per_seg = BLKS_PER_SEG(sbi);
3721
3722         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3723                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3724                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3725                         return 1;
3726
3727                 if (f2fs_sb_has_readonly(sbi))
3728                         goto check_data;
3729
3730                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3731                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3732                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3733                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3734                                          i, j,
3735                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3736                                 return 1;
3737                         }
3738                 }
3739         }
3740 check_data:
3741         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3742                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3743                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3744                         return 1;
3745
3746                 if (f2fs_sb_has_readonly(sbi))
3747                         goto skip_cross;
3748
3749                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3750                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3751                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3752                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3753                                          i, j,
3754                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3755                                 return 1;
3756                         }
3757                 }
3758         }
3759         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3760                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3761                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3762                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3763                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3764                                          i, j,
3765                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3766                                 return 1;
3767                         }
3768                 }
3769         }
3770 skip_cross:
3771         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3772         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3773
3774         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3775                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3776                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3777                          sit_bitmap_size, nat_bitmap_size);
3778                 return 1;
3779         }
3780
3781         cp_pack_start_sum = __start_sum_addr(sbi);
3782         cp_payload = __cp_payload(sbi);
3783         if (cp_pack_start_sum < cp_payload + 1 ||
3784                 cp_pack_start_sum > blocks_per_seg - 1 -
3785                         NR_CURSEG_PERSIST_TYPE) {
3786                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3787                          cp_pack_start_sum);
3788                 return 1;
3789         }
3790
3791         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3792                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3793                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3794                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3795                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3796                           le32_to_cpu(ckpt->checksum_offset));
3797                 return 1;
3798         }
3799
3800         nat_blocks = nat_segs << log_blocks_per_seg;
3801         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3802         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3803         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3804                 (cp_payload + F2FS_CP_PACKS +
3805                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3806                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3807                           cp_payload, nat_bits_blocks);
3808                 return 1;
3809         }
3810
3811         if (unlikely(f2fs_cp_error(sbi))) {
3812                 f2fs_err(sbi, "A bug case: need to run fsck");
3813                 return 1;
3814         }
3815         return 0;
3816 }
3817
3818 static void init_sb_info(struct f2fs_sb_info *sbi)
3819 {
3820         struct f2fs_super_block *raw_super = sbi->raw_super;
3821         int i;
3822
3823         sbi->log_sectors_per_block =
3824                 le32_to_cpu(raw_super->log_sectors_per_block);
3825         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3826         sbi->blocksize = BIT(sbi->log_blocksize);
3827         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3828         sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg);
3829         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3830         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3831         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3832         sbi->total_node_count = SEGS_TO_BLKS(sbi,
3833                         ((le32_to_cpu(raw_super->segment_count_nat) / 2) *
3834                         NAT_ENTRY_PER_BLOCK));
3835         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3836         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3837         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3838         sbi->cur_victim_sec = NULL_SECNO;
3839         sbi->gc_mode = GC_NORMAL;
3840         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3841         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3842         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3843         sbi->migration_granularity = SEGS_PER_SEC(sbi);
3844         sbi->migration_window_granularity = f2fs_sb_has_blkzoned(sbi) ?
3845                 DEF_MIGRATION_WINDOW_GRANULARITY_ZONED : SEGS_PER_SEC(sbi);
3846         sbi->seq_file_ra_mul = MIN_RA_MUL;
3847         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3848         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3849         spin_lock_init(&sbi->gc_remaining_trials_lock);
3850         atomic64_set(&sbi->current_atomic_write, 0);
3851
3852         sbi->dir_level = DEF_DIR_LEVEL;
3853         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3854         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3855         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3856         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3857         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3858         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3859                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3860         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3861
3862         for (i = 0; i < NR_COUNT_TYPE; i++)
3863                 atomic_set(&sbi->nr_pages[i], 0);
3864
3865         for (i = 0; i < META; i++)
3866                 atomic_set(&sbi->wb_sync_req[i], 0);
3867
3868         INIT_LIST_HEAD(&sbi->s_list);
3869         mutex_init(&sbi->umount_mutex);
3870         init_f2fs_rwsem(&sbi->io_order_lock);
3871         spin_lock_init(&sbi->cp_lock);
3872
3873         sbi->dirty_device = 0;
3874         spin_lock_init(&sbi->dev_lock);
3875
3876         init_f2fs_rwsem(&sbi->sb_lock);
3877         init_f2fs_rwsem(&sbi->pin_sem);
3878 }
3879
3880 static int init_percpu_info(struct f2fs_sb_info *sbi)
3881 {
3882         int err;
3883
3884         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3885         if (err)
3886                 return err;
3887
3888         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3889         if (err)
3890                 goto err_valid_block;
3891
3892         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3893                                                                 GFP_KERNEL);
3894         if (err)
3895                 goto err_node_block;
3896         return 0;
3897
3898 err_node_block:
3899         percpu_counter_destroy(&sbi->rf_node_block_count);
3900 err_valid_block:
3901         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3902         return err;
3903 }
3904
3905 #ifdef CONFIG_BLK_DEV_ZONED
3906
3907 struct f2fs_report_zones_args {
3908         struct f2fs_sb_info *sbi;
3909         struct f2fs_dev_info *dev;
3910 };
3911
3912 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3913                               void *data)
3914 {
3915         struct f2fs_report_zones_args *rz_args = data;
3916         block_t unusable_blocks = (zone->len - zone->capacity) >>
3917                                         F2FS_LOG_SECTORS_PER_BLOCK;
3918
3919         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3920                 return 0;
3921
3922         set_bit(idx, rz_args->dev->blkz_seq);
3923         if (!rz_args->sbi->unusable_blocks_per_sec) {
3924                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3925                 return 0;
3926         }
3927         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3928                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3929                 return -EINVAL;
3930         }
3931         return 0;
3932 }
3933
3934 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3935 {
3936         struct block_device *bdev = FDEV(devi).bdev;
3937         sector_t nr_sectors = bdev_nr_sectors(bdev);
3938         struct f2fs_report_zones_args rep_zone_arg;
3939         u64 zone_sectors;
3940         unsigned int max_open_zones;
3941         int ret;
3942
3943         if (!f2fs_sb_has_blkzoned(sbi))
3944                 return 0;
3945
3946         if (bdev_is_zoned(FDEV(devi).bdev)) {
3947                 max_open_zones = bdev_max_open_zones(bdev);
3948                 if (max_open_zones && (max_open_zones < sbi->max_open_zones))
3949                         sbi->max_open_zones = max_open_zones;
3950                 if (sbi->max_open_zones < F2FS_OPTION(sbi).active_logs) {
3951                         f2fs_err(sbi,
3952                                 "zoned: max open zones %u is too small, need at least %u open zones",
3953                                 sbi->max_open_zones, F2FS_OPTION(sbi).active_logs);
3954                         return -EINVAL;
3955                 }
3956         }
3957
3958         zone_sectors = bdev_zone_sectors(bdev);
3959         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3960                                 SECTOR_TO_BLOCK(zone_sectors))
3961                 return -EINVAL;
3962         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3963         FDEV(devi).nr_blkz = div_u64(SECTOR_TO_BLOCK(nr_sectors),
3964                                         sbi->blocks_per_blkz);
3965         if (nr_sectors & (zone_sectors - 1))
3966                 FDEV(devi).nr_blkz++;
3967
3968         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3969                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3970                                         * sizeof(unsigned long),
3971                                         GFP_KERNEL);
3972         if (!FDEV(devi).blkz_seq)
3973                 return -ENOMEM;
3974
3975         rep_zone_arg.sbi = sbi;
3976         rep_zone_arg.dev = &FDEV(devi);
3977
3978         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3979                                   &rep_zone_arg);
3980         if (ret < 0)
3981                 return ret;
3982         return 0;
3983 }
3984 #endif
3985
3986 /*
3987  * Read f2fs raw super block.
3988  * Because we have two copies of super block, so read both of them
3989  * to get the first valid one. If any one of them is broken, we pass
3990  * them recovery flag back to the caller.
3991  */
3992 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3993                         struct f2fs_super_block **raw_super,
3994                         int *valid_super_block, int *recovery)
3995 {
3996         struct super_block *sb = sbi->sb;
3997         int block;
3998         struct folio *folio;
3999         struct f2fs_super_block *super;
4000         int err = 0;
4001
4002         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
4003         if (!super)
4004                 return -ENOMEM;
4005
4006         for (block = 0; block < 2; block++) {
4007                 folio = read_mapping_folio(sb->s_bdev->bd_mapping, block, NULL);
4008                 if (IS_ERR(folio)) {
4009                         f2fs_err(sbi, "Unable to read %dth superblock",
4010                                  block + 1);
4011                         err = PTR_ERR(folio);
4012                         *recovery = 1;
4013                         continue;
4014                 }
4015
4016                 /* sanity checking of raw super */
4017                 err = sanity_check_raw_super(sbi, folio, block);
4018                 if (err) {
4019                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
4020                                  block + 1);
4021                         folio_put(folio);
4022                         *recovery = 1;
4023                         continue;
4024                 }
4025
4026                 if (!*raw_super) {
4027                         memcpy(super, F2FS_SUPER_BLOCK(folio, block),
4028                                                         sizeof(*super));
4029                         *valid_super_block = block;
4030                         *raw_super = super;
4031                 }
4032                 folio_put(folio);
4033         }
4034
4035         /* No valid superblock */
4036         if (!*raw_super)
4037                 kfree(super);
4038         else
4039                 err = 0;
4040
4041         return err;
4042 }
4043
4044 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
4045 {
4046         struct folio *folio;
4047         pgoff_t index;
4048         __u32 crc = 0;
4049         int err;
4050
4051         if ((recover && f2fs_readonly(sbi->sb)) ||
4052                                 f2fs_hw_is_readonly(sbi)) {
4053                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
4054                 return -EROFS;
4055         }
4056
4057         /* we should update superblock crc here */
4058         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
4059                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
4060                                 offsetof(struct f2fs_super_block, crc));
4061                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
4062         }
4063
4064         /* write back-up superblock first */
4065         index = sbi->valid_super_block ? 0 : 1;
4066         folio = read_mapping_folio(sbi->sb->s_bdev->bd_mapping, index, NULL);
4067         if (IS_ERR(folio))
4068                 return PTR_ERR(folio);
4069         err = __f2fs_commit_super(sbi, folio, index, true);
4070         folio_put(folio);
4071
4072         /* if we are in recovery path, skip writing valid superblock */
4073         if (recover || err)
4074                 return err;
4075
4076         /* write current valid superblock */
4077         index = sbi->valid_super_block;
4078         folio = read_mapping_folio(sbi->sb->s_bdev->bd_mapping, index, NULL);
4079         if (IS_ERR(folio))
4080                 return PTR_ERR(folio);
4081         err = __f2fs_commit_super(sbi, folio, index, true);
4082         folio_put(folio);
4083         return err;
4084 }
4085
4086 static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
4087 {
4088         unsigned long flags;
4089
4090         spin_lock_irqsave(&sbi->error_lock, flags);
4091         if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
4092                 sbi->stop_reason[reason]++;
4093         spin_unlock_irqrestore(&sbi->error_lock, flags);
4094 }
4095
4096 static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
4097 {
4098         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4099         unsigned long flags;
4100         int err;
4101
4102         f2fs_down_write(&sbi->sb_lock);
4103
4104         spin_lock_irqsave(&sbi->error_lock, flags);
4105         if (sbi->error_dirty) {
4106                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4107                                                         MAX_F2FS_ERRORS);
4108                 sbi->error_dirty = false;
4109         }
4110         memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
4111         spin_unlock_irqrestore(&sbi->error_lock, flags);
4112
4113         err = f2fs_commit_super(sbi, false);
4114
4115         f2fs_up_write(&sbi->sb_lock);
4116         if (err)
4117                 f2fs_err_ratelimited(sbi,
4118                         "f2fs_commit_super fails to record stop_reason, err:%d",
4119                         err);
4120 }
4121
4122 void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
4123 {
4124         unsigned long flags;
4125
4126         spin_lock_irqsave(&sbi->error_lock, flags);
4127         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
4128                 set_bit(flag, (unsigned long *)sbi->errors);
4129                 sbi->error_dirty = true;
4130         }
4131         spin_unlock_irqrestore(&sbi->error_lock, flags);
4132 }
4133
4134 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
4135 {
4136         unsigned long flags;
4137         bool need_update = false;
4138
4139         spin_lock_irqsave(&sbi->error_lock, flags);
4140         if (sbi->error_dirty) {
4141                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4142                                                         MAX_F2FS_ERRORS);
4143                 sbi->error_dirty = false;
4144                 need_update = true;
4145         }
4146         spin_unlock_irqrestore(&sbi->error_lock, flags);
4147
4148         return need_update;
4149 }
4150
4151 static void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error)
4152 {
4153         int err;
4154
4155         f2fs_down_write(&sbi->sb_lock);
4156
4157         if (!f2fs_update_errors(sbi))
4158                 goto out_unlock;
4159
4160         err = f2fs_commit_super(sbi, false);
4161         if (err)
4162                 f2fs_err_ratelimited(sbi,
4163                         "f2fs_commit_super fails to record errors:%u, err:%d",
4164                         error, err);
4165 out_unlock:
4166         f2fs_up_write(&sbi->sb_lock);
4167 }
4168
4169 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
4170 {
4171         f2fs_save_errors(sbi, error);
4172         f2fs_record_errors(sbi, error);
4173 }
4174
4175 void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error)
4176 {
4177         f2fs_save_errors(sbi, error);
4178
4179         if (!sbi->error_dirty)
4180                 return;
4181         if (!test_bit(error, (unsigned long *)sbi->errors))
4182                 return;
4183         schedule_work(&sbi->s_error_work);
4184 }
4185
4186 static bool system_going_down(void)
4187 {
4188         return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
4189                 || system_state == SYSTEM_RESTART;
4190 }
4191
4192 void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason)
4193 {
4194         struct super_block *sb = sbi->sb;
4195         bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
4196         bool continue_fs = !shutdown &&
4197                         F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
4198
4199         set_ckpt_flags(sbi, CP_ERROR_FLAG);
4200
4201         if (!f2fs_hw_is_readonly(sbi)) {
4202                 save_stop_reason(sbi, reason);
4203
4204                 /*
4205                  * always create an asynchronous task to record stop_reason
4206                  * in order to avoid potential deadlock when running into
4207                  * f2fs_record_stop_reason() synchronously.
4208                  */
4209                 schedule_work(&sbi->s_error_work);
4210         }
4211
4212         /*
4213          * We force ERRORS_RO behavior when system is rebooting. Otherwise we
4214          * could panic during 'reboot -f' as the underlying device got already
4215          * disabled.
4216          */
4217         if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
4218                                 !shutdown && !system_going_down() &&
4219                                 !is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN))
4220                 panic("F2FS-fs (device %s): panic forced after error\n",
4221                                                         sb->s_id);
4222
4223         if (shutdown)
4224                 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
4225
4226         /*
4227          * Continue filesystem operators if errors=continue. Should not set
4228          * RO by shutdown, since RO bypasses thaw_super which can hang the
4229          * system.
4230          */
4231         if (continue_fs || f2fs_readonly(sb) || shutdown) {
4232                 f2fs_warn(sbi, "Stopped filesystem due to reason: %d", reason);
4233                 return;
4234         }
4235
4236         f2fs_warn(sbi, "Remounting filesystem read-only");
4237
4238         /*
4239          * We have already set CP_ERROR_FLAG flag to stop all updates
4240          * to filesystem, so it doesn't need to set SB_RDONLY flag here
4241          * because the flag should be set covered w/ sb->s_umount semaphore
4242          * via remount procedure, otherwise, it will confuse code like
4243          * freeze_super() which will lead to deadlocks and other problems.
4244          */
4245 }
4246
4247 static void f2fs_record_error_work(struct work_struct *work)
4248 {
4249         struct f2fs_sb_info *sbi = container_of(work,
4250                                         struct f2fs_sb_info, s_error_work);
4251
4252         f2fs_record_stop_reason(sbi);
4253 }
4254
4255 static inline unsigned int get_first_zoned_segno(struct f2fs_sb_info *sbi)
4256 {
4257         int devi;
4258
4259         for (devi = 0; devi < sbi->s_ndevs; devi++)
4260                 if (bdev_is_zoned(FDEV(devi).bdev))
4261                         return GET_SEGNO(sbi, FDEV(devi).start_blk);
4262         return 0;
4263 }
4264
4265 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
4266 {
4267         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4268         unsigned int max_devices = MAX_DEVICES;
4269         unsigned int logical_blksize;
4270         blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
4271         int i;
4272
4273         /* Initialize single device information */
4274         if (!RDEV(0).path[0]) {
4275                 if (!bdev_is_zoned(sbi->sb->s_bdev))
4276                         return 0;
4277                 max_devices = 1;
4278         }
4279
4280         /*
4281          * Initialize multiple devices information, or single
4282          * zoned block device information.
4283          */
4284         sbi->devs = f2fs_kzalloc(sbi,
4285                                  array_size(max_devices,
4286                                             sizeof(struct f2fs_dev_info)),
4287                                  GFP_KERNEL);
4288         if (!sbi->devs)
4289                 return -ENOMEM;
4290
4291         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
4292         sbi->aligned_blksize = true;
4293 #ifdef CONFIG_BLK_DEV_ZONED
4294         sbi->max_open_zones = UINT_MAX;
4295         sbi->blkzone_alloc_policy = BLKZONE_ALLOC_PRIOR_SEQ;
4296 #endif
4297
4298         for (i = 0; i < max_devices; i++) {
4299                 if (i == 0)
4300                         FDEV(0).bdev_file = sbi->sb->s_bdev_file;
4301                 else if (!RDEV(i).path[0])
4302                         break;
4303
4304                 if (max_devices > 1) {
4305                         /* Multi-device mount */
4306                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
4307                         FDEV(i).total_segments =
4308                                 le32_to_cpu(RDEV(i).total_segments);
4309                         if (i == 0) {
4310                                 FDEV(i).start_blk = 0;
4311                                 FDEV(i).end_blk = FDEV(i).start_blk +
4312                                         SEGS_TO_BLKS(sbi,
4313                                         FDEV(i).total_segments) - 1 +
4314                                         le32_to_cpu(raw_super->segment0_blkaddr);
4315                         } else {
4316                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
4317                                 FDEV(i).end_blk = FDEV(i).start_blk +
4318                                                 SEGS_TO_BLKS(sbi,
4319                                                 FDEV(i).total_segments) - 1;
4320                                 FDEV(i).bdev_file = bdev_file_open_by_path(
4321                                         FDEV(i).path, mode, sbi->sb, NULL);
4322                         }
4323                 }
4324                 if (IS_ERR(FDEV(i).bdev_file))
4325                         return PTR_ERR(FDEV(i).bdev_file);
4326
4327                 FDEV(i).bdev = file_bdev(FDEV(i).bdev_file);
4328                 /* to release errored devices */
4329                 sbi->s_ndevs = i + 1;
4330
4331                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4332                         sbi->aligned_blksize = false;
4333
4334 #ifdef CONFIG_BLK_DEV_ZONED
4335                 if (bdev_is_zoned(FDEV(i).bdev)) {
4336                         if (!f2fs_sb_has_blkzoned(sbi)) {
4337                                 f2fs_err(sbi, "Zoned block device feature not enabled");
4338                                 return -EINVAL;
4339                         }
4340                         if (init_blkz_info(sbi, i)) {
4341                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
4342                                 return -EINVAL;
4343                         }
4344                         if (max_devices == 1)
4345                                 break;
4346                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: Host-managed)",
4347                                   i, FDEV(i).path,
4348                                   FDEV(i).total_segments,
4349                                   FDEV(i).start_blk, FDEV(i).end_blk);
4350                         continue;
4351                 }
4352 #endif
4353                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4354                           i, FDEV(i).path,
4355                           FDEV(i).total_segments,
4356                           FDEV(i).start_blk, FDEV(i).end_blk);
4357         }
4358         return 0;
4359 }
4360
4361 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4362 {
4363 #if IS_ENABLED(CONFIG_UNICODE)
4364         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4365                 const struct f2fs_sb_encodings *encoding_info;
4366                 struct unicode_map *encoding;
4367                 __u16 encoding_flags;
4368
4369                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4370                 if (!encoding_info) {
4371                         f2fs_err(sbi,
4372                                  "Encoding requested by superblock is unknown");
4373                         return -EINVAL;
4374                 }
4375
4376                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4377                 encoding = utf8_load(encoding_info->version);
4378                 if (IS_ERR(encoding)) {
4379                         f2fs_err(sbi,
4380                                  "can't mount with superblock charset: %s-%u.%u.%u "
4381                                  "not supported by the kernel. flags: 0x%x.",
4382                                  encoding_info->name,
4383                                  unicode_major(encoding_info->version),
4384                                  unicode_minor(encoding_info->version),
4385                                  unicode_rev(encoding_info->version),
4386                                  encoding_flags);
4387                         return PTR_ERR(encoding);
4388                 }
4389                 f2fs_info(sbi, "Using encoding defined by superblock: "
4390                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4391                          unicode_major(encoding_info->version),
4392                          unicode_minor(encoding_info->version),
4393                          unicode_rev(encoding_info->version),
4394                          encoding_flags);
4395
4396                 sbi->sb->s_encoding = encoding;
4397                 sbi->sb->s_encoding_flags = encoding_flags;
4398         }
4399 #else
4400         if (f2fs_sb_has_casefold(sbi)) {
4401                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4402                 return -EINVAL;
4403         }
4404 #endif
4405         return 0;
4406 }
4407
4408 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4409 {
4410         /* adjust parameters according to the volume size */
4411         if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4412                 if (f2fs_block_unit_discard(sbi))
4413                         SM_I(sbi)->dcc_info->discard_granularity =
4414                                                 MIN_DISCARD_GRANULARITY;
4415                 if (!f2fs_lfs_mode(sbi))
4416                         SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4417                                                 BIT(F2FS_IPU_HONOR_OPU_WRITE);
4418         }
4419
4420         sbi->readdir_ra = true;
4421 }
4422
4423 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4424 {
4425         struct f2fs_sb_info *sbi;
4426         struct f2fs_super_block *raw_super;
4427         struct inode *root;
4428         int err;
4429         bool skip_recovery = false, need_fsck = false;
4430         char *options = NULL;
4431         int recovery, i, valid_super_block;
4432         struct curseg_info *seg_i;
4433         int retry_cnt = 1;
4434 #ifdef CONFIG_QUOTA
4435         bool quota_enabled = false;
4436 #endif
4437
4438 try_onemore:
4439         err = -EINVAL;
4440         raw_super = NULL;
4441         valid_super_block = -1;
4442         recovery = 0;
4443
4444         /* allocate memory for f2fs-specific super block info */
4445         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4446         if (!sbi)
4447                 return -ENOMEM;
4448
4449         sbi->sb = sb;
4450
4451         /* initialize locks within allocated memory */
4452         init_f2fs_rwsem(&sbi->gc_lock);
4453         mutex_init(&sbi->writepages);
4454         init_f2fs_rwsem(&sbi->cp_global_sem);
4455         init_f2fs_rwsem(&sbi->node_write);
4456         init_f2fs_rwsem(&sbi->node_change);
4457         spin_lock_init(&sbi->stat_lock);
4458         init_f2fs_rwsem(&sbi->cp_rwsem);
4459         init_f2fs_rwsem(&sbi->quota_sem);
4460         init_waitqueue_head(&sbi->cp_wait);
4461         spin_lock_init(&sbi->error_lock);
4462
4463         for (i = 0; i < NR_INODE_TYPE; i++) {
4464                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4465                 spin_lock_init(&sbi->inode_lock[i]);
4466         }
4467         mutex_init(&sbi->flush_lock);
4468
4469         /* Load the checksum driver */
4470         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4471         if (IS_ERR(sbi->s_chksum_driver)) {
4472                 f2fs_err(sbi, "Cannot load crc32 driver.");
4473                 err = PTR_ERR(sbi->s_chksum_driver);
4474                 sbi->s_chksum_driver = NULL;
4475                 goto free_sbi;
4476         }
4477
4478         /* set a block size */
4479         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4480                 f2fs_err(sbi, "unable to set blocksize");
4481                 goto free_sbi;
4482         }
4483
4484         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4485                                                                 &recovery);
4486         if (err)
4487                 goto free_sbi;
4488
4489         sb->s_fs_info = sbi;
4490         sbi->raw_super = raw_super;
4491
4492         INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
4493         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4494         memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
4495
4496         /* precompute checksum seed for metadata */
4497         if (f2fs_sb_has_inode_chksum(sbi))
4498                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4499                                                 sizeof(raw_super->uuid));
4500
4501         default_options(sbi, false);
4502         /* parse mount options */
4503         options = kstrdup((const char *)data, GFP_KERNEL);
4504         if (data && !options) {
4505                 err = -ENOMEM;
4506                 goto free_sb_buf;
4507         }
4508
4509         err = parse_options(sb, options, false);
4510         if (err)
4511                 goto free_options;
4512
4513         sb->s_maxbytes = max_file_blocks(NULL) <<
4514                                 le32_to_cpu(raw_super->log_blocksize);
4515         sb->s_max_links = F2FS_LINK_MAX;
4516
4517         err = f2fs_setup_casefold(sbi);
4518         if (err)
4519                 goto free_options;
4520
4521 #ifdef CONFIG_QUOTA
4522         sb->dq_op = &f2fs_quota_operations;
4523         sb->s_qcop = &f2fs_quotactl_ops;
4524         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4525
4526         if (f2fs_sb_has_quota_ino(sbi)) {
4527                 for (i = 0; i < MAXQUOTAS; i++) {
4528                         if (f2fs_qf_ino(sbi->sb, i))
4529                                 sbi->nquota_files++;
4530                 }
4531         }
4532 #endif
4533
4534         sb->s_op = &f2fs_sops;
4535 #ifdef CONFIG_FS_ENCRYPTION
4536         sb->s_cop = &f2fs_cryptops;
4537 #endif
4538 #ifdef CONFIG_FS_VERITY
4539         sb->s_vop = &f2fs_verityops;
4540 #endif
4541         sb->s_xattr = f2fs_xattr_handlers;
4542         sb->s_export_op = &f2fs_export_ops;
4543         sb->s_magic = F2FS_SUPER_MAGIC;
4544         sb->s_time_gran = 1;
4545         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4546                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4547         super_set_uuid(sb, (void *) raw_super->uuid, sizeof(raw_super->uuid));
4548         super_set_sysfs_name_bdev(sb);
4549         sb->s_iflags |= SB_I_CGROUPWB;
4550
4551         /* init f2fs-specific super block info */
4552         sbi->valid_super_block = valid_super_block;
4553
4554         /* disallow all the data/node/meta page writes */
4555         set_sbi_flag(sbi, SBI_POR_DOING);
4556
4557         err = f2fs_init_write_merge_io(sbi);
4558         if (err)
4559                 goto free_bio_info;
4560
4561         init_sb_info(sbi);
4562
4563         err = f2fs_init_iostat(sbi);
4564         if (err)
4565                 goto free_bio_info;
4566
4567         err = init_percpu_info(sbi);
4568         if (err)
4569                 goto free_iostat;
4570
4571         /* init per sbi slab cache */
4572         err = f2fs_init_xattr_caches(sbi);
4573         if (err)
4574                 goto free_percpu;
4575         err = f2fs_init_page_array_cache(sbi);
4576         if (err)
4577                 goto free_xattr_cache;
4578
4579         /* get an inode for meta space */
4580         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4581         if (IS_ERR(sbi->meta_inode)) {
4582                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4583                 err = PTR_ERR(sbi->meta_inode);
4584                 goto free_page_array_cache;
4585         }
4586
4587         err = f2fs_get_valid_checkpoint(sbi);
4588         if (err) {
4589                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4590                 goto free_meta_inode;
4591         }
4592
4593         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4594                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4595         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4596                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4597                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4598         }
4599
4600         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4601                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4602
4603         /* Initialize device list */
4604         err = f2fs_scan_devices(sbi);
4605         if (err) {
4606                 f2fs_err(sbi, "Failed to find devices");
4607                 goto free_devices;
4608         }
4609
4610         err = f2fs_init_post_read_wq(sbi);
4611         if (err) {
4612                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4613                 goto free_devices;
4614         }
4615
4616         sbi->total_valid_node_count =
4617                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4618         percpu_counter_set(&sbi->total_valid_inode_count,
4619                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4620         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4621         sbi->total_valid_block_count =
4622                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4623         sbi->last_valid_block_count = sbi->total_valid_block_count;
4624         sbi->reserved_blocks = 0;
4625         sbi->current_reserved_blocks = 0;
4626         limit_reserve_root(sbi);
4627         adjust_unusable_cap_perc(sbi);
4628
4629         f2fs_init_extent_cache_info(sbi);
4630
4631         f2fs_init_ino_entry_info(sbi);
4632
4633         f2fs_init_fsync_node_info(sbi);
4634
4635         /* setup checkpoint request control and start checkpoint issue thread */
4636         f2fs_init_ckpt_req_control(sbi);
4637         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4638                         test_opt(sbi, MERGE_CHECKPOINT)) {
4639                 err = f2fs_start_ckpt_thread(sbi);
4640                 if (err) {
4641                         f2fs_err(sbi,
4642                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4643                             err);
4644                         goto stop_ckpt_thread;
4645                 }
4646         }
4647
4648         /* setup f2fs internal modules */
4649         err = f2fs_build_segment_manager(sbi);
4650         if (err) {
4651                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4652                          err);
4653                 goto free_sm;
4654         }
4655         err = f2fs_build_node_manager(sbi);
4656         if (err) {
4657                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4658                          err);
4659                 goto free_nm;
4660         }
4661
4662         /* For write statistics */
4663         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4664
4665         /* get segno of first zoned block device */
4666         sbi->first_zoned_segno = get_first_zoned_segno(sbi);
4667
4668         /* Read accumulated write IO statistics if exists */
4669         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4670         if (__exist_node_summaries(sbi))
4671                 sbi->kbytes_written =
4672                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4673
4674         f2fs_build_gc_manager(sbi);
4675
4676         err = f2fs_build_stats(sbi);
4677         if (err)
4678                 goto free_nm;
4679
4680         /* get an inode for node space */
4681         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4682         if (IS_ERR(sbi->node_inode)) {
4683                 f2fs_err(sbi, "Failed to read node inode");
4684                 err = PTR_ERR(sbi->node_inode);
4685                 goto free_stats;
4686         }
4687
4688         /* read root inode and dentry */
4689         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4690         if (IS_ERR(root)) {
4691                 f2fs_err(sbi, "Failed to read root inode");
4692                 err = PTR_ERR(root);
4693                 goto free_node_inode;
4694         }
4695         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4696                         !root->i_size || !root->i_nlink) {
4697                 iput(root);
4698                 err = -EINVAL;
4699                 goto free_node_inode;
4700         }
4701
4702         generic_set_sb_d_ops(sb);
4703         sb->s_root = d_make_root(root); /* allocate root dentry */
4704         if (!sb->s_root) {
4705                 err = -ENOMEM;
4706                 goto free_node_inode;
4707         }
4708
4709         err = f2fs_init_compress_inode(sbi);
4710         if (err)
4711                 goto free_root_inode;
4712
4713         err = f2fs_register_sysfs(sbi);
4714         if (err)
4715                 goto free_compress_inode;
4716
4717 #ifdef CONFIG_QUOTA
4718         /* Enable quota usage during mount */
4719         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4720                 err = f2fs_enable_quotas(sb);
4721                 if (err)
4722                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4723         }
4724
4725         quota_enabled = f2fs_recover_quota_begin(sbi);
4726 #endif
4727         /* if there are any orphan inodes, free them */
4728         err = f2fs_recover_orphan_inodes(sbi);
4729         if (err)
4730                 goto free_meta;
4731
4732         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4733                 goto reset_checkpoint;
4734
4735         /* recover fsynced data */
4736         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4737                         !test_opt(sbi, NORECOVERY)) {
4738                 /*
4739                  * mount should be failed, when device has readonly mode, and
4740                  * previous checkpoint was not done by clean system shutdown.
4741                  */
4742                 if (f2fs_hw_is_readonly(sbi)) {
4743                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4744                                 err = f2fs_recover_fsync_data(sbi, true);
4745                                 if (err > 0) {
4746                                         err = -EROFS;
4747                                         f2fs_err(sbi, "Need to recover fsync data, but "
4748                                                 "write access unavailable, please try "
4749                                                 "mount w/ disable_roll_forward or norecovery");
4750                                 }
4751                                 if (err < 0)
4752                                         goto free_meta;
4753                         }
4754                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4755                         goto reset_checkpoint;
4756                 }
4757
4758                 if (need_fsck)
4759                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4760
4761                 if (skip_recovery)
4762                         goto reset_checkpoint;
4763
4764                 err = f2fs_recover_fsync_data(sbi, false);
4765                 if (err < 0) {
4766                         if (err != -ENOMEM)
4767                                 skip_recovery = true;
4768                         need_fsck = true;
4769                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4770                                  err);
4771                         goto free_meta;
4772                 }
4773         } else {
4774                 err = f2fs_recover_fsync_data(sbi, true);
4775
4776                 if (!f2fs_readonly(sb) && err > 0) {
4777                         err = -EINVAL;
4778                         f2fs_err(sbi, "Need to recover fsync data");
4779                         goto free_meta;
4780                 }
4781         }
4782
4783 #ifdef CONFIG_QUOTA
4784         f2fs_recover_quota_end(sbi, quota_enabled);
4785 #endif
4786 reset_checkpoint:
4787         /*
4788          * If the f2fs is not readonly and fsync data recovery succeeds,
4789          * write pointer consistency of cursegs and other zones are already
4790          * checked and fixed during recovery. However, if recovery fails,
4791          * write pointers are left untouched, and retry-mount should check
4792          * them here.
4793          */
4794         if (skip_recovery)
4795                 err = f2fs_check_and_fix_write_pointer(sbi);
4796         if (err)
4797                 goto free_meta;
4798
4799         /* f2fs_recover_fsync_data() cleared this already */
4800         clear_sbi_flag(sbi, SBI_POR_DOING);
4801
4802         err = f2fs_init_inmem_curseg(sbi);
4803         if (err)
4804                 goto sync_free_meta;
4805
4806         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4807                 err = f2fs_disable_checkpoint(sbi);
4808                 if (err)
4809                         goto sync_free_meta;
4810         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4811                 f2fs_enable_checkpoint(sbi);
4812         }
4813
4814         /*
4815          * If filesystem is not mounted as read-only then
4816          * do start the gc_thread.
4817          */
4818         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4819                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4820                 /* After POR, we can run background GC thread.*/
4821                 err = f2fs_start_gc_thread(sbi);
4822                 if (err)
4823                         goto sync_free_meta;
4824         }
4825         kvfree(options);
4826
4827         /* recover broken superblock */
4828         if (recovery) {
4829                 err = f2fs_commit_super(sbi, true);
4830                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4831                           sbi->valid_super_block ? 1 : 2, err);
4832         }
4833
4834         f2fs_join_shrinker(sbi);
4835
4836         f2fs_tuning_parameters(sbi);
4837
4838         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4839                     cur_cp_version(F2FS_CKPT(sbi)));
4840         f2fs_update_time(sbi, CP_TIME);
4841         f2fs_update_time(sbi, REQ_TIME);
4842         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4843         return 0;
4844
4845 sync_free_meta:
4846         /* safe to flush all the data */
4847         sync_filesystem(sbi->sb);
4848         retry_cnt = 0;
4849
4850 free_meta:
4851 #ifdef CONFIG_QUOTA
4852         f2fs_truncate_quota_inode_pages(sb);
4853         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4854                 f2fs_quota_off_umount(sbi->sb);
4855 #endif
4856         /*
4857          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4858          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4859          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4860          * falls into an infinite loop in f2fs_sync_meta_pages().
4861          */
4862         truncate_inode_pages_final(META_MAPPING(sbi));
4863         /* evict some inodes being cached by GC */
4864         evict_inodes(sb);
4865         f2fs_unregister_sysfs(sbi);
4866 free_compress_inode:
4867         f2fs_destroy_compress_inode(sbi);
4868 free_root_inode:
4869         dput(sb->s_root);
4870         sb->s_root = NULL;
4871 free_node_inode:
4872         f2fs_release_ino_entry(sbi, true);
4873         truncate_inode_pages_final(NODE_MAPPING(sbi));
4874         iput(sbi->node_inode);
4875         sbi->node_inode = NULL;
4876 free_stats:
4877         f2fs_destroy_stats(sbi);
4878 free_nm:
4879         /* stop discard thread before destroying node manager */
4880         f2fs_stop_discard_thread(sbi);
4881         f2fs_destroy_node_manager(sbi);
4882 free_sm:
4883         f2fs_destroy_segment_manager(sbi);
4884 stop_ckpt_thread:
4885         f2fs_stop_ckpt_thread(sbi);
4886         /* flush s_error_work before sbi destroy */
4887         flush_work(&sbi->s_error_work);
4888         f2fs_destroy_post_read_wq(sbi);
4889 free_devices:
4890         destroy_device_list(sbi);
4891         kvfree(sbi->ckpt);
4892 free_meta_inode:
4893         make_bad_inode(sbi->meta_inode);
4894         iput(sbi->meta_inode);
4895         sbi->meta_inode = NULL;
4896 free_page_array_cache:
4897         f2fs_destroy_page_array_cache(sbi);
4898 free_xattr_cache:
4899         f2fs_destroy_xattr_caches(sbi);
4900 free_percpu:
4901         destroy_percpu_info(sbi);
4902 free_iostat:
4903         f2fs_destroy_iostat(sbi);
4904 free_bio_info:
4905         for (i = 0; i < NR_PAGE_TYPE; i++)
4906                 kvfree(sbi->write_io[i]);
4907
4908 #if IS_ENABLED(CONFIG_UNICODE)
4909         utf8_unload(sb->s_encoding);
4910         sb->s_encoding = NULL;
4911 #endif
4912 free_options:
4913 #ifdef CONFIG_QUOTA
4914         for (i = 0; i < MAXQUOTAS; i++)
4915                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4916 #endif
4917         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4918         kvfree(options);
4919 free_sb_buf:
4920         kfree(raw_super);
4921 free_sbi:
4922         if (sbi->s_chksum_driver)
4923                 crypto_free_shash(sbi->s_chksum_driver);
4924         kfree(sbi);
4925         sb->s_fs_info = NULL;
4926
4927         /* give only one another chance */
4928         if (retry_cnt > 0 && skip_recovery) {
4929                 retry_cnt--;
4930                 shrink_dcache_sb(sb);
4931                 goto try_onemore;
4932         }
4933         return err;
4934 }
4935
4936 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4937                         const char *dev_name, void *data)
4938 {
4939         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4940 }
4941
4942 static void kill_f2fs_super(struct super_block *sb)
4943 {
4944         struct f2fs_sb_info *sbi = F2FS_SB(sb);
4945
4946         if (sb->s_root) {
4947                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4948                 f2fs_stop_gc_thread(sbi);
4949                 f2fs_stop_discard_thread(sbi);
4950
4951 #ifdef CONFIG_F2FS_FS_COMPRESSION
4952                 /*
4953                  * latter evict_inode() can bypass checking and invalidating
4954                  * compress inode cache.
4955                  */
4956                 if (test_opt(sbi, COMPRESS_CACHE))
4957                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4958 #endif
4959
4960                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4961                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4962                         struct cp_control cpc = {
4963                                 .reason = CP_UMOUNT,
4964                         };
4965                         stat_inc_cp_call_count(sbi, TOTAL_CALL);
4966                         f2fs_write_checkpoint(sbi, &cpc);
4967                 }
4968
4969                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4970                         sb->s_flags &= ~SB_RDONLY;
4971         }
4972         kill_block_super(sb);
4973         /* Release block devices last, after fscrypt_destroy_keyring(). */
4974         if (sbi) {
4975                 destroy_device_list(sbi);
4976                 kfree(sbi);
4977                 sb->s_fs_info = NULL;
4978         }
4979 }
4980
4981 static struct file_system_type f2fs_fs_type = {
4982         .owner          = THIS_MODULE,
4983         .name           = "f2fs",
4984         .mount          = f2fs_mount,
4985         .kill_sb        = kill_f2fs_super,
4986         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4987 };
4988 MODULE_ALIAS_FS("f2fs");
4989
4990 static int __init init_inodecache(void)
4991 {
4992         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4993                         sizeof(struct f2fs_inode_info), 0,
4994                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4995         return f2fs_inode_cachep ? 0 : -ENOMEM;
4996 }
4997
4998 static void destroy_inodecache(void)
4999 {
5000         /*
5001          * Make sure all delayed rcu free inodes are flushed before we
5002          * destroy cache.
5003          */
5004         rcu_barrier();
5005         kmem_cache_destroy(f2fs_inode_cachep);
5006 }
5007
5008 static int __init init_f2fs_fs(void)
5009 {
5010         int err;
5011
5012         err = init_inodecache();
5013         if (err)
5014                 goto fail;
5015         err = f2fs_create_node_manager_caches();
5016         if (err)
5017                 goto free_inodecache;
5018         err = f2fs_create_segment_manager_caches();
5019         if (err)
5020                 goto free_node_manager_caches;
5021         err = f2fs_create_checkpoint_caches();
5022         if (err)
5023                 goto free_segment_manager_caches;
5024         err = f2fs_create_recovery_cache();
5025         if (err)
5026                 goto free_checkpoint_caches;
5027         err = f2fs_create_extent_cache();
5028         if (err)
5029                 goto free_recovery_cache;
5030         err = f2fs_create_garbage_collection_cache();
5031         if (err)
5032                 goto free_extent_cache;
5033         err = f2fs_init_sysfs();
5034         if (err)
5035                 goto free_garbage_collection_cache;
5036         err = f2fs_init_shrinker();
5037         if (err)
5038                 goto free_sysfs;
5039         f2fs_create_root_stats();
5040         err = f2fs_init_post_read_processing();
5041         if (err)
5042                 goto free_root_stats;
5043         err = f2fs_init_iostat_processing();
5044         if (err)
5045                 goto free_post_read;
5046         err = f2fs_init_bio_entry_cache();
5047         if (err)
5048                 goto free_iostat;
5049         err = f2fs_init_bioset();
5050         if (err)
5051                 goto free_bio_entry_cache;
5052         err = f2fs_init_compress_mempool();
5053         if (err)
5054                 goto free_bioset;
5055         err = f2fs_init_compress_cache();
5056         if (err)
5057                 goto free_compress_mempool;
5058         err = f2fs_create_casefold_cache();
5059         if (err)
5060                 goto free_compress_cache;
5061         err = register_filesystem(&f2fs_fs_type);
5062         if (err)
5063                 goto free_casefold_cache;
5064         return 0;
5065 free_casefold_cache:
5066         f2fs_destroy_casefold_cache();
5067 free_compress_cache:
5068         f2fs_destroy_compress_cache();
5069 free_compress_mempool:
5070         f2fs_destroy_compress_mempool();
5071 free_bioset:
5072         f2fs_destroy_bioset();
5073 free_bio_entry_cache:
5074         f2fs_destroy_bio_entry_cache();
5075 free_iostat:
5076         f2fs_destroy_iostat_processing();
5077 free_post_read:
5078         f2fs_destroy_post_read_processing();
5079 free_root_stats:
5080         f2fs_destroy_root_stats();
5081         f2fs_exit_shrinker();
5082 free_sysfs:
5083         f2fs_exit_sysfs();
5084 free_garbage_collection_cache:
5085         f2fs_destroy_garbage_collection_cache();
5086 free_extent_cache:
5087         f2fs_destroy_extent_cache();
5088 free_recovery_cache:
5089         f2fs_destroy_recovery_cache();
5090 free_checkpoint_caches:
5091         f2fs_destroy_checkpoint_caches();
5092 free_segment_manager_caches:
5093         f2fs_destroy_segment_manager_caches();
5094 free_node_manager_caches:
5095         f2fs_destroy_node_manager_caches();
5096 free_inodecache:
5097         destroy_inodecache();
5098 fail:
5099         return err;
5100 }
5101
5102 static void __exit exit_f2fs_fs(void)
5103 {
5104         unregister_filesystem(&f2fs_fs_type);
5105         f2fs_destroy_casefold_cache();
5106         f2fs_destroy_compress_cache();
5107         f2fs_destroy_compress_mempool();
5108         f2fs_destroy_bioset();
5109         f2fs_destroy_bio_entry_cache();
5110         f2fs_destroy_iostat_processing();
5111         f2fs_destroy_post_read_processing();
5112         f2fs_destroy_root_stats();
5113         f2fs_exit_shrinker();
5114         f2fs_exit_sysfs();
5115         f2fs_destroy_garbage_collection_cache();
5116         f2fs_destroy_extent_cache();
5117         f2fs_destroy_recovery_cache();
5118         f2fs_destroy_checkpoint_caches();
5119         f2fs_destroy_segment_manager_caches();
5120         f2fs_destroy_node_manager_caches();
5121         destroy_inodecache();
5122 }
5123
5124 module_init(init_f2fs_fs)
5125 module_exit(exit_f2fs_fs)
5126
5127 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
5128 MODULE_DESCRIPTION("Flash Friendly File System");
5129 MODULE_LICENSE("GPL");
5130 MODULE_SOFTDEP("pre: crc32");
5131