fs/f2fs/super.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/super.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/fs.h>
  11 #include <linux/fs_context.h>
  12 #include <linux/sched/mm.h>
  13 #include <linux/statfs.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/kthread.h>
  16 #include <linux/parser.h>
  17 #include <linux/mount.h>
  18 #include <linux/seq_file.h>
  19 #include <linux/proc_fs.h>
  20 #include <linux/random.h>
  21 #include <linux/exportfs.h>
  22 #include <linux/blkdev.h>
  23 #include <linux/quotaops.h>
  24 #include <linux/f2fs_fs.h>
  25 #include <linux/sysfs.h>
  26 #include <linux/quota.h>
  27 #include <linux/unicode.h>
  28 #include <linux/part_stat.h>
  29 #include <linux/zstd.h>
  30 #include <linux/lz4.h>
  31
  32 #include "f2fs.h"
  33 #include "node.h"
  34 #include "segment.h"
  35 #include "xattr.h"
  36 #include "gc.h"
  37 #include "iostat.h"
  38
  39 #define CREATE_TRACE_POINTS
  40 #include <trace/events/f2fs.h>
  41
  42 static struct kmem_cache *f2fs_inode_cachep;
  43
  44 #ifdef CONFIG_F2FS_FAULT_INJECTION
  45
  46 const char *f2fs_fault_name[FAULT_MAX] = {
  47         [FAULT_KMALLOC]         = "kmalloc",
  48         [FAULT_KVMALLOC]        = "kvmalloc",
  49         [FAULT_PAGE_ALLOC]      = "page alloc",
  50         [FAULT_PAGE_GET]        = "page get",
  51         [FAULT_ALLOC_NID]       = "alloc nid",
  52         [FAULT_ORPHAN]          = "orphan",
  53         [FAULT_BLOCK]           = "no more block",
  54         [FAULT_DIR_DEPTH]       = "too big dir depth",
  55         [FAULT_EVICT_INODE]     = "evict_inode fail",
  56         [FAULT_TRUNCATE]        = "truncate fail",
  57         [FAULT_READ_IO]         = "read IO error",
  58         [FAULT_CHECKPOINT]      = "checkpoint error",
  59         [FAULT_DISCARD]         = "discard error",
  60         [FAULT_WRITE_IO]        = "write IO error",
  61         [FAULT_SLAB_ALLOC]      = "slab alloc",
  62         [FAULT_DQUOT_INIT]      = "dquot initialize",
  63         [FAULT_LOCK_OP]         = "lock_op",
  64         [FAULT_BLKADDR]         = "invalid blkaddr",
  65 };
  66
  67 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
  68                                                         unsigned int type)
  69 {
  70         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
  71
  72         if (rate) {
  73                 atomic_set(&ffi->inject_ops, 0);
  74                 ffi->inject_rate = rate;
  75         }
  76
  77         if (type)
  78                 ffi->inject_type = type;
  79
  80         if (!rate && !type)
  81                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
  82 }
  83 #endif
  84
  85 /* f2fs-wide shrinker description */
  86 static struct shrinker f2fs_shrinker_info = {
  87         .scan_objects = f2fs_shrink_scan,
  88         .count_objects = f2fs_shrink_count,
  89         .seeks = DEFAULT_SEEKS,
  90 };
  91
  92 enum {
  93         Opt_gc_background,
  94         Opt_disable_roll_forward,
  95         Opt_norecovery,
  96         Opt_discard,
  97         Opt_nodiscard,
  98         Opt_noheap,
  99         Opt_heap,
 100         Opt_user_xattr,
 101         Opt_nouser_xattr,
 102         Opt_acl,
 103         Opt_noacl,
 104         Opt_active_logs,
 105         Opt_disable_ext_identify,
 106         Opt_inline_xattr,
 107         Opt_noinline_xattr,
 108         Opt_inline_xattr_size,
 109         Opt_inline_data,
 110         Opt_inline_dentry,
 111         Opt_noinline_dentry,
 112         Opt_flush_merge,
 113         Opt_noflush_merge,
 114         Opt_barrier,
 115         Opt_nobarrier,
 116         Opt_fastboot,
 117         Opt_extent_cache,
 118         Opt_noextent_cache,
 119         Opt_noinline_data,
 120         Opt_data_flush,
 121         Opt_reserve_root,
 122         Opt_resgid,
 123         Opt_resuid,
 124         Opt_mode,
 125         Opt_io_size_bits,
 126         Opt_fault_injection,
 127         Opt_fault_type,
 128         Opt_lazytime,
 129         Opt_nolazytime,
 130         Opt_quota,
 131         Opt_noquota,
 132         Opt_usrquota,
 133         Opt_grpquota,
 134         Opt_prjquota,
 135         Opt_usrjquota,
 136         Opt_grpjquota,
 137         Opt_prjjquota,
 138         Opt_offusrjquota,
 139         Opt_offgrpjquota,
 140         Opt_offprjjquota,
 141         Opt_jqfmt_vfsold,
 142         Opt_jqfmt_vfsv0,
 143         Opt_jqfmt_vfsv1,
 144         Opt_alloc,
 145         Opt_fsync,
 146         Opt_test_dummy_encryption,
 147         Opt_inlinecrypt,
 148         Opt_checkpoint_disable,
 149         Opt_checkpoint_disable_cap,
 150         Opt_checkpoint_disable_cap_perc,
 151         Opt_checkpoint_enable,
 152         Opt_checkpoint_merge,
 153         Opt_nocheckpoint_merge,
 154         Opt_compress_algorithm,
 155         Opt_compress_log_size,
 156         Opt_compress_extension,
 157         Opt_nocompress_extension,
 158         Opt_compress_chksum,
 159         Opt_compress_mode,
 160         Opt_compress_cache,
 161         Opt_atgc,
 162         Opt_gc_merge,
 163         Opt_nogc_merge,
 164         Opt_discard_unit,
 165         Opt_memory_mode,
 166         Opt_age_extent_cache,
 167         Opt_err,
 168 };
 169
 170 static match_table_t f2fs_tokens = {
 171         {Opt_gc_background, "background_gc=%s"},
 172         {Opt_disable_roll_forward, "disable_roll_forward"},
 173         {Opt_norecovery, "norecovery"},
 174         {Opt_discard, "discard"},
 175         {Opt_nodiscard, "nodiscard"},
 176         {Opt_noheap, "no_heap"},
 177         {Opt_heap, "heap"},
 178         {Opt_user_xattr, "user_xattr"},
 179         {Opt_nouser_xattr, "nouser_xattr"},
 180         {Opt_acl, "acl"},
 181         {Opt_noacl, "noacl"},
 182         {Opt_active_logs, "active_logs=%u"},
 183         {Opt_disable_ext_identify, "disable_ext_identify"},
 184         {Opt_inline_xattr, "inline_xattr"},
 185         {Opt_noinline_xattr, "noinline_xattr"},
 186         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
 187         {Opt_inline_data, "inline_data"},
 188         {Opt_inline_dentry, "inline_dentry"},
 189         {Opt_noinline_dentry, "noinline_dentry"},
 190         {Opt_flush_merge, "flush_merge"},
 191         {Opt_noflush_merge, "noflush_merge"},
 192         {Opt_barrier, "barrier"},
 193         {Opt_nobarrier, "nobarrier"},
 194         {Opt_fastboot, "fastboot"},
 195         {Opt_extent_cache, "extent_cache"},
 196         {Opt_noextent_cache, "noextent_cache"},
 197         {Opt_noinline_data, "noinline_data"},
 198         {Opt_data_flush, "data_flush"},
 199         {Opt_reserve_root, "reserve_root=%u"},
 200         {Opt_resgid, "resgid=%u"},
 201         {Opt_resuid, "resuid=%u"},
 202         {Opt_mode, "mode=%s"},
 203         {Opt_io_size_bits, "io_bits=%u"},
 204         {Opt_fault_injection, "fault_injection=%u"},
 205         {Opt_fault_type, "fault_type=%u"},
 206         {Opt_lazytime, "lazytime"},
 207         {Opt_nolazytime, "nolazytime"},
 208         {Opt_quota, "quota"},
 209         {Opt_noquota, "noquota"},
 210         {Opt_usrquota, "usrquota"},
 211         {Opt_grpquota, "grpquota"},
 212         {Opt_prjquota, "prjquota"},
 213         {Opt_usrjquota, "usrjquota=%s"},
 214         {Opt_grpjquota, "grpjquota=%s"},
 215         {Opt_prjjquota, "prjjquota=%s"},
 216         {Opt_offusrjquota, "usrjquota="},
 217         {Opt_offgrpjquota, "grpjquota="},
 218         {Opt_offprjjquota, "prjjquota="},
 219         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
 220         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
 221         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 222         {Opt_alloc, "alloc_mode=%s"},
 223         {Opt_fsync, "fsync_mode=%s"},
 224         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
 225         {Opt_test_dummy_encryption, "test_dummy_encryption"},
 226         {Opt_inlinecrypt, "inlinecrypt"},
 227         {Opt_checkpoint_disable, "checkpoint=disable"},
 228         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
 229         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
 230         {Opt_checkpoint_enable, "checkpoint=enable"},
 231         {Opt_checkpoint_merge, "checkpoint_merge"},
 232         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
 233         {Opt_compress_algorithm, "compress_algorithm=%s"},
 234         {Opt_compress_log_size, "compress_log_size=%u"},
 235         {Opt_compress_extension, "compress_extension=%s"},
 236         {Opt_nocompress_extension, "nocompress_extension=%s"},
 237         {Opt_compress_chksum, "compress_chksum"},
 238         {Opt_compress_mode, "compress_mode=%s"},
 239         {Opt_compress_cache, "compress_cache"},
 240         {Opt_atgc, "atgc"},
 241         {Opt_gc_merge, "gc_merge"},
 242         {Opt_nogc_merge, "nogc_merge"},
 243         {Opt_discard_unit, "discard_unit=%s"},
 244         {Opt_memory_mode, "memory=%s"},
 245         {Opt_age_extent_cache, "age_extent_cache"},
 246         {Opt_err, NULL},
 247 };
 248
 249 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 250 {
 251         struct va_format vaf;
 252         va_list args;
 253         int level;
 254
 255         va_start(args, fmt);
 256
 257         level = printk_get_level(fmt);
 258         vaf.fmt = printk_skip_level(fmt);
 259         vaf.va = &args;
 260         printk("%c%cF2FS-fs (%s): %pV\n",
 261                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
 262
 263         va_end(args);
 264 }
 265
 266 #if IS_ENABLED(CONFIG_UNICODE)
 267 static const struct f2fs_sb_encodings {
 268         __u16 magic;
 269         char *name;
 270         unsigned int version;
 271 } f2fs_sb_encoding_map[] = {
 272         {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
 273 };
 274
 275 static const struct f2fs_sb_encodings *
 276 f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
 277 {
 278         __u16 magic = le16_to_cpu(sb->s_encoding);
 279         int i;
 280
 281         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
 282                 if (magic == f2fs_sb_encoding_map[i].magic)
 283                         return &f2fs_sb_encoding_map[i];
 284
 285         return NULL;
 286 }
 287
 288 struct kmem_cache *f2fs_cf_name_slab;
 289 static int __init f2fs_create_casefold_cache(void)
 290 {
 291         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
 292                                                         F2FS_NAME_LEN);
 293         return f2fs_cf_name_slab ? 0 : -ENOMEM;
 294 }
 295
 296 static void f2fs_destroy_casefold_cache(void)
 297 {
 298         kmem_cache_destroy(f2fs_cf_name_slab);
 299 }
 300 #else
 301 static int __init f2fs_create_casefold_cache(void) { return 0; }
 302 static void f2fs_destroy_casefold_cache(void) { }
 303 #endif
 304
 305 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 306 {
 307         block_t limit = min((sbi->user_block_count >> 3),
 308                         sbi->user_block_count - sbi->reserved_blocks);
 309
 310         /* limit is 12.5% */
 311         if (test_opt(sbi, RESERVE_ROOT) &&
 312                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 313                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
 314                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
 315                           F2FS_OPTION(sbi).root_reserved_blocks);
 316         }
 317         if (!test_opt(sbi, RESERVE_ROOT) &&
 318                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
 319                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 320                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
 321                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
 322                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
 323                           from_kuid_munged(&init_user_ns,
 324                                            F2FS_OPTION(sbi).s_resuid),
 325                           from_kgid_munged(&init_user_ns,
 326                                            F2FS_OPTION(sbi).s_resgid));
 327 }
 328
 329 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
 330 {
 331         unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
 332         unsigned int avg_vblocks;
 333         unsigned int wanted_reserved_segments;
 334         block_t avail_user_block_count;
 335
 336         if (!F2FS_IO_ALIGNED(sbi))
 337                 return 0;
 338
 339         /* average valid block count in section in worst case */
 340         avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
 341
 342         /*
 343          * we need enough free space when migrating one section in worst case
 344          */
 345         wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
 346                                                 reserved_segments(sbi);
 347         wanted_reserved_segments -= reserved_segments(sbi);
 348
 349         avail_user_block_count = sbi->user_block_count -
 350                                 sbi->current_reserved_blocks -
 351                                 F2FS_OPTION(sbi).root_reserved_blocks;
 352
 353         if (wanted_reserved_segments * sbi->blocks_per_seg >
 354                                         avail_user_block_count) {
 355                 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
 356                         wanted_reserved_segments,
 357                         avail_user_block_count >> sbi->log_blocks_per_seg);
 358                 return -ENOSPC;
 359         }
 360
 361         SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
 362
 363         f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
 364                          wanted_reserved_segments);
 365
 366         return 0;
 367 }
 368
 369 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
 370 {
 371         if (!F2FS_OPTION(sbi).unusable_cap_perc)
 372                 return;
 373
 374         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
 375                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
 376         else
 377                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
 378                                         F2FS_OPTION(sbi).unusable_cap_perc;
 379
 380         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
 381                         F2FS_OPTION(sbi).unusable_cap,
 382                         F2FS_OPTION(sbi).unusable_cap_perc);
 383 }
 384
 385 static void init_once(void *foo)
 386 {
 387         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
 388
 389         inode_init_once(&fi->vfs_inode);
 390 }
 391
 392 #ifdef CONFIG_QUOTA
 393 static const char * const quotatypes[] = INITQFNAMES;
 394 #define QTYPE2NAME(t) (quotatypes[t])
 395 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 396                                                         substring_t *args)
 397 {
 398         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 399         char *qname;
 400         int ret = -EINVAL;
 401
 402         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
 403                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 404                 return -EINVAL;
 405         }
 406         if (f2fs_sb_has_quota_ino(sbi)) {
 407                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 408                 return 0;
 409         }
 410
 411         qname = match_strdup(args);
 412         if (!qname) {
 413                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
 414                 return -ENOMEM;
 415         }
 416         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 417                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 418                         ret = 0;
 419                 else
 420                         f2fs_err(sbi, "%s quota file already specified",
 421                                  QTYPE2NAME(qtype));
 422                 goto errout;
 423         }
 424         if (strchr(qname, '/')) {
 425                 f2fs_err(sbi, "quotafile must be on filesystem root");
 426                 goto errout;
 427         }
 428         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
 429         set_opt(sbi, QUOTA);
 430         return 0;
 431 errout:
 432         kfree(qname);
 433         return ret;
 434 }
 435
 436 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 437 {
 438         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 439
 440         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
 441                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 442                 return -EINVAL;
 443         }
 444         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
 445         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
 446         return 0;
 447 }
 448
 449 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 450 {
 451         /*
 452          * We do the test below only for project quotas. 'usrquota' and
 453          * 'grpquota' mount options are allowed even without quota feature
 454          * to support legacy quotas in quota files.
 455          */
 456         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
 457                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 458                 return -1;
 459         }
 460         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
 461                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
 462                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
 463                 if (test_opt(sbi, USRQUOTA) &&
 464                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
 465                         clear_opt(sbi, USRQUOTA);
 466
 467                 if (test_opt(sbi, GRPQUOTA) &&
 468                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
 469                         clear_opt(sbi, GRPQUOTA);
 470
 471                 if (test_opt(sbi, PRJQUOTA) &&
 472                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
 473                         clear_opt(sbi, PRJQUOTA);
 474
 475                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 476                                 test_opt(sbi, PRJQUOTA)) {
 477                         f2fs_err(sbi, "old and new quota format mixing");
 478                         return -1;
 479                 }
 480
 481                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
 482                         f2fs_err(sbi, "journaled quota format not specified");
 483                         return -1;
 484                 }
 485         }
 486
 487         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
 488                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 489                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
 490         }
 491         return 0;
 492 }
 493 #endif
 494
 495 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
 496                                           const char *opt,
 497                                           const substring_t *arg,
 498                                           bool is_remount)
 499 {
 500         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 501         struct fs_parameter param = {
 502                 .type = fs_value_is_string,
 503                 .string = arg->from ? arg->from : "",
 504         };
 505         struct fscrypt_dummy_policy *policy =
 506                 &F2FS_OPTION(sbi).dummy_enc_policy;
 507         int err;
 508
 509         if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
 510                 f2fs_warn(sbi, "test_dummy_encryption option not supported");
 511                 return -EINVAL;
 512         }
 513
 514         if (!f2fs_sb_has_encrypt(sbi)) {
 515                 f2fs_err(sbi, "Encrypt feature is off");
 516                 return -EINVAL;
 517         }
 518
 519         /*
 520          * This mount option is just for testing, and it's not worthwhile to
 521          * implement the extra complexity (e.g. RCU protection) that would be
 522          * needed to allow it to be set or changed during remount.  We do allow
 523          * it to be specified during remount, but only if there is no change.
 524          */
 525         if (is_remount && !fscrypt_is_dummy_policy_set(policy)) {
 526                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
 527                 return -EINVAL;
 528         }
 529
 530         err = fscrypt_parse_test_dummy_encryption(&param, policy);
 531         if (err) {
 532                 if (err == -EEXIST)
 533                         f2fs_warn(sbi,
 534                                   "Can't change test_dummy_encryption on remount");
 535                 else if (err == -EINVAL)
 536                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
 537                                   opt);
 538                 else
 539                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
 540                                   opt, err);
 541                 return -EINVAL;
 542         }
 543         err = fscrypt_add_test_dummy_key(sb, policy);
 544         if (err) {
 545                 f2fs_warn(sbi, "Error adding test dummy encryption key [%d]",
 546                           err);
 547                 return err;
 548         }
 549         f2fs_warn(sbi, "Test dummy encryption mode enabled");
 550         return 0;
 551 }
 552
 553 #ifdef CONFIG_F2FS_FS_COMPRESSION
 554 /*
 555  * 1. The same extension name cannot not appear in both compress and non-compress extension
 556  * at the same time.
 557  * 2. If the compress extension specifies all files, the types specified by the non-compress
 558  * extension will be treated as special cases and will not be compressed.
 559  * 3. Don't allow the non-compress extension specifies all files.
 560  */
 561 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
 562 {
 563         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 564         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 565         int ext_cnt, noext_cnt, index = 0, no_index = 0;
 566
 567         ext = F2FS_OPTION(sbi).extensions;
 568         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 569         noext = F2FS_OPTION(sbi).noextensions;
 570         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 571
 572         if (!noext_cnt)
 573                 return 0;
 574
 575         for (no_index = 0; no_index < noext_cnt; no_index++) {
 576                 if (!strcasecmp("*", noext[no_index])) {
 577                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
 578                         return -EINVAL;
 579                 }
 580                 for (index = 0; index < ext_cnt; index++) {
 581                         if (!strcasecmp(ext[index], noext[no_index])) {
 582                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
 583                                                 ext[index]);
 584                                 return -EINVAL;
 585                         }
 586                 }
 587         }
 588         return 0;
 589 }
 590
 591 #ifdef CONFIG_F2FS_FS_LZ4
 592 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
 593 {
 594 #ifdef CONFIG_F2FS_FS_LZ4HC
 595         unsigned int level;
 596 #endif
 597
 598         if (strlen(str) == 3) {
 599                 F2FS_OPTION(sbi).compress_level = 0;
 600                 return 0;
 601         }
 602
 603 #ifdef CONFIG_F2FS_FS_LZ4HC
 604         str += 3;
 605
 606         if (str[0] != ':') {
 607                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 608                 return -EINVAL;
 609         }
 610         if (kstrtouint(str + 1, 10, &level))
 611                 return -EINVAL;
 612
 613         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
 614                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
 615                 return -EINVAL;
 616         }
 617
 618         F2FS_OPTION(sbi).compress_level = level;
 619         return 0;
 620 #else
 621         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
 622         return -EINVAL;
 623 #endif
 624 }
 625 #endif
 626
 627 #ifdef CONFIG_F2FS_FS_ZSTD
 628 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
 629 {
 630         unsigned int level;
 631         int len = 4;
 632
 633         if (strlen(str) == len) {
 634                 F2FS_OPTION(sbi).compress_level = 0;
 635                 return 0;
 636         }
 637
 638         str += len;
 639
 640         if (str[0] != ':') {
 641                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
 642                 return -EINVAL;
 643         }
 644         if (kstrtouint(str + 1, 10, &level))
 645                 return -EINVAL;
 646
 647         if (!level || level > zstd_max_clevel()) {
 648                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
 649                 return -EINVAL;
 650         }
 651
 652         F2FS_OPTION(sbi).compress_level = level;
 653         return 0;
 654 }
 655 #endif
 656 #endif
 657
 658 static int parse_options(struct super_block *sb, char *options, bool is_remount)
 659 {
 660         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 661         substring_t args[MAX_OPT_ARGS];
 662 #ifdef CONFIG_F2FS_FS_COMPRESSION
 663         unsigned char (*ext)[F2FS_EXTENSION_LEN];
 664         unsigned char (*noext)[F2FS_EXTENSION_LEN];
 665         int ext_cnt, noext_cnt;
 666 #endif
 667         char *p, *name;
 668         int arg = 0;
 669         kuid_t uid;
 670         kgid_t gid;
 671         int ret;
 672
 673         if (!options)
 674                 goto default_check;
 675
 676         while ((p = strsep(&options, ",")) != NULL) {
 677                 int token;
 678
 679                 if (!*p)
 680                         continue;
 681                 /*
 682                  * Initialize args struct so we know whether arg was
 683                  * found; some options take optional arguments.
 684                  */
 685                 args[0].to = args[0].from = NULL;
 686                 token = match_token(p, f2fs_tokens, args);
 687
 688                 switch (token) {
 689                 case Opt_gc_background:
 690                         name = match_strdup(&args[0]);
 691
 692                         if (!name)
 693                                 return -ENOMEM;
 694                         if (!strcmp(name, "on")) {
 695                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
 696                         } else if (!strcmp(name, "off")) {
 697                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
 698                         } else if (!strcmp(name, "sync")) {
 699                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
 700                         } else {
 701                                 kfree(name);
 702                                 return -EINVAL;
 703                         }
 704                         kfree(name);
 705                         break;
 706                 case Opt_disable_roll_forward:
 707                         set_opt(sbi, DISABLE_ROLL_FORWARD);
 708                         break;
 709                 case Opt_norecovery:
 710                         /* this option mounts f2fs with ro */
 711                         set_opt(sbi, NORECOVERY);
 712                         if (!f2fs_readonly(sb))
 713                                 return -EINVAL;
 714                         break;
 715                 case Opt_discard:
 716                         if (!f2fs_hw_support_discard(sbi)) {
 717                                 f2fs_warn(sbi, "device does not support discard");
 718                                 break;
 719                         }
 720                         set_opt(sbi, DISCARD);
 721                         break;
 722                 case Opt_nodiscard:
 723                         if (f2fs_hw_should_discard(sbi)) {
 724                                 f2fs_warn(sbi, "discard is required for zoned block devices");
 725                                 return -EINVAL;
 726                         }
 727                         clear_opt(sbi, DISCARD);
 728                         break;
 729                 case Opt_noheap:
 730                         set_opt(sbi, NOHEAP);
 731                         break;
 732                 case Opt_heap:
 733                         clear_opt(sbi, NOHEAP);
 734                         break;
 735 #ifdef CONFIG_F2FS_FS_XATTR
 736                 case Opt_user_xattr:
 737                         set_opt(sbi, XATTR_USER);
 738                         break;
 739                 case Opt_nouser_xattr:
 740                         clear_opt(sbi, XATTR_USER);
 741                         break;
 742                 case Opt_inline_xattr:
 743                         set_opt(sbi, INLINE_XATTR);
 744                         break;
 745                 case Opt_noinline_xattr:
 746                         clear_opt(sbi, INLINE_XATTR);
 747                         break;
 748                 case Opt_inline_xattr_size:
 749                         if (args->from && match_int(args, &arg))
 750                                 return -EINVAL;
 751                         set_opt(sbi, INLINE_XATTR_SIZE);
 752                         F2FS_OPTION(sbi).inline_xattr_size = arg;
 753                         break;
 754 #else
 755                 case Opt_user_xattr:
 756                         f2fs_info(sbi, "user_xattr options not supported");
 757                         break;
 758                 case Opt_nouser_xattr:
 759                         f2fs_info(sbi, "nouser_xattr options not supported");
 760                         break;
 761                 case Opt_inline_xattr:
 762                         f2fs_info(sbi, "inline_xattr options not supported");
 763                         break;
 764                 case Opt_noinline_xattr:
 765                         f2fs_info(sbi, "noinline_xattr options not supported");
 766                         break;
 767 #endif
 768 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 769                 case Opt_acl:
 770                         set_opt(sbi, POSIX_ACL);
 771                         break;
 772                 case Opt_noacl:
 773                         clear_opt(sbi, POSIX_ACL);
 774                         break;
 775 #else
 776                 case Opt_acl:
 777                         f2fs_info(sbi, "acl options not supported");
 778                         break;
 779                 case Opt_noacl:
 780                         f2fs_info(sbi, "noacl options not supported");
 781                         break;
 782 #endif
 783                 case Opt_active_logs:
 784                         if (args->from && match_int(args, &arg))
 785                                 return -EINVAL;
 786                         if (arg != 2 && arg != 4 &&
 787                                 arg != NR_CURSEG_PERSIST_TYPE)
 788                                 return -EINVAL;
 789                         F2FS_OPTION(sbi).active_logs = arg;
 790                         break;
 791                 case Opt_disable_ext_identify:
 792                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
 793                         break;
 794                 case Opt_inline_data:
 795                         set_opt(sbi, INLINE_DATA);
 796                         break;
 797                 case Opt_inline_dentry:
 798                         set_opt(sbi, INLINE_DENTRY);
 799                         break;
 800                 case Opt_noinline_dentry:
 801                         clear_opt(sbi, INLINE_DENTRY);
 802                         break;
 803                 case Opt_flush_merge:
 804                         set_opt(sbi, FLUSH_MERGE);
 805                         break;
 806                 case Opt_noflush_merge:
 807                         clear_opt(sbi, FLUSH_MERGE);
 808                         break;
 809                 case Opt_nobarrier:
 810                         set_opt(sbi, NOBARRIER);
 811                         break;
 812                 case Opt_barrier:
 813                         clear_opt(sbi, NOBARRIER);
 814                         break;
 815                 case Opt_fastboot:
 816                         set_opt(sbi, FASTBOOT);
 817                         break;
 818                 case Opt_extent_cache:
 819                         set_opt(sbi, READ_EXTENT_CACHE);
 820                         break;
 821                 case Opt_noextent_cache:
 822                         clear_opt(sbi, READ_EXTENT_CACHE);
 823                         break;
 824                 case Opt_noinline_data:
 825                         clear_opt(sbi, INLINE_DATA);
 826                         break;
 827                 case Opt_data_flush:
 828                         set_opt(sbi, DATA_FLUSH);
 829                         break;
 830                 case Opt_reserve_root:
 831                         if (args->from && match_int(args, &arg))
 832                                 return -EINVAL;
 833                         if (test_opt(sbi, RESERVE_ROOT)) {
 834                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
 835                                           F2FS_OPTION(sbi).root_reserved_blocks);
 836                         } else {
 837                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
 838                                 set_opt(sbi, RESERVE_ROOT);
 839                         }
 840                         break;
 841                 case Opt_resuid:
 842                         if (args->from && match_int(args, &arg))
 843                                 return -EINVAL;
 844                         uid = make_kuid(current_user_ns(), arg);
 845                         if (!uid_valid(uid)) {
 846                                 f2fs_err(sbi, "Invalid uid value %d", arg);
 847                                 return -EINVAL;
 848                         }
 849                         F2FS_OPTION(sbi).s_resuid = uid;
 850                         break;
 851                 case Opt_resgid:
 852                         if (args->from && match_int(args, &arg))
 853                                 return -EINVAL;
 854                         gid = make_kgid(current_user_ns(), arg);
 855                         if (!gid_valid(gid)) {
 856                                 f2fs_err(sbi, "Invalid gid value %d", arg);
 857                                 return -EINVAL;
 858                         }
 859                         F2FS_OPTION(sbi).s_resgid = gid;
 860                         break;
 861                 case Opt_mode:
 862                         name = match_strdup(&args[0]);
 863
 864                         if (!name)
 865                                 return -ENOMEM;
 866                         if (!strcmp(name, "adaptive")) {
 867                                 if (f2fs_sb_has_blkzoned(sbi)) {
 868                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 869                                         kfree(name);
 870                                         return -EINVAL;
 871                                 }
 872                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 873                         } else if (!strcmp(name, "lfs")) {
 874                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 875                         } else if (!strcmp(name, "fragment:segment")) {
 876                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
 877                         } else if (!strcmp(name, "fragment:block")) {
 878                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
 879                         } else {
 880                                 kfree(name);
 881                                 return -EINVAL;
 882                         }
 883                         kfree(name);
 884                         break;
 885                 case Opt_io_size_bits:
 886                         if (args->from && match_int(args, &arg))
 887                                 return -EINVAL;
 888                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
 889                                 f2fs_warn(sbi, "Not support %d, larger than %d",
 890                                           1 << arg, BIO_MAX_VECS);
 891                                 return -EINVAL;
 892                         }
 893                         F2FS_OPTION(sbi).write_io_size_bits = arg;
 894                         break;
 895 #ifdef CONFIG_F2FS_FAULT_INJECTION
 896                 case Opt_fault_injection:
 897                         if (args->from && match_int(args, &arg))
 898                                 return -EINVAL;
 899                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
 900                         set_opt(sbi, FAULT_INJECTION);
 901                         break;
 902
 903                 case Opt_fault_type:
 904                         if (args->from && match_int(args, &arg))
 905                                 return -EINVAL;
 906                         f2fs_build_fault_attr(sbi, 0, arg);
 907                         set_opt(sbi, FAULT_INJECTION);
 908                         break;
 909 #else
 910                 case Opt_fault_injection:
 911                         f2fs_info(sbi, "fault_injection options not supported");
 912                         break;
 913
 914                 case Opt_fault_type:
 915                         f2fs_info(sbi, "fault_type options not supported");
 916                         break;
 917 #endif
 918                 case Opt_lazytime:
 919                         sb->s_flags |= SB_LAZYTIME;
 920                         break;
 921                 case Opt_nolazytime:
 922                         sb->s_flags &= ~SB_LAZYTIME;
 923                         break;
 924 #ifdef CONFIG_QUOTA
 925                 case Opt_quota:
 926                 case Opt_usrquota:
 927                         set_opt(sbi, USRQUOTA);
 928                         break;
 929                 case Opt_grpquota:
 930                         set_opt(sbi, GRPQUOTA);
 931                         break;
 932                 case Opt_prjquota:
 933                         set_opt(sbi, PRJQUOTA);
 934                         break;
 935                 case Opt_usrjquota:
 936                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
 937                         if (ret)
 938                                 return ret;
 939                         break;
 940                 case Opt_grpjquota:
 941                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
 942                         if (ret)
 943                                 return ret;
 944                         break;
 945                 case Opt_prjjquota:
 946                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
 947                         if (ret)
 948                                 return ret;
 949                         break;
 950                 case Opt_offusrjquota:
 951                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
 952                         if (ret)
 953                                 return ret;
 954                         break;
 955                 case Opt_offgrpjquota:
 956                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
 957                         if (ret)
 958                                 return ret;
 959                         break;
 960                 case Opt_offprjjquota:
 961                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
 962                         if (ret)
 963                                 return ret;
 964                         break;
 965                 case Opt_jqfmt_vfsold:
 966                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
 967                         break;
 968                 case Opt_jqfmt_vfsv0:
 969                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
 970                         break;
 971                 case Opt_jqfmt_vfsv1:
 972                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
 973                         break;
 974                 case Opt_noquota:
 975                         clear_opt(sbi, QUOTA);
 976                         clear_opt(sbi, USRQUOTA);
 977                         clear_opt(sbi, GRPQUOTA);
 978                         clear_opt(sbi, PRJQUOTA);
 979                         break;
 980 #else
 981                 case Opt_quota:
 982                 case Opt_usrquota:
 983                 case Opt_grpquota:
 984                 case Opt_prjquota:
 985                 case Opt_usrjquota:
 986                 case Opt_grpjquota:
 987                 case Opt_prjjquota:
 988                 case Opt_offusrjquota:
 989                 case Opt_offgrpjquota:
 990                 case Opt_offprjjquota:
 991                 case Opt_jqfmt_vfsold:
 992                 case Opt_jqfmt_vfsv0:
 993                 case Opt_jqfmt_vfsv1:
 994                 case Opt_noquota:
 995                         f2fs_info(sbi, "quota operations not supported");
 996                         break;
 997 #endif
 998                 case Opt_alloc:
 999                         name = match_strdup(&args[0]);
1000                         if (!name)
1001                                 return -ENOMEM;
1002
1003                         if (!strcmp(name, "default")) {
1004                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1005                         } else if (!strcmp(name, "reuse")) {
1006                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1007                         } else {
1008                                 kfree(name);
1009                                 return -EINVAL;
1010                         }
1011                         kfree(name);
1012                         break;
1013                 case Opt_fsync:
1014                         name = match_strdup(&args[0]);
1015                         if (!name)
1016                                 return -ENOMEM;
1017                         if (!strcmp(name, "posix")) {
1018                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1019                         } else if (!strcmp(name, "strict")) {
1020                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1021                         } else if (!strcmp(name, "nobarrier")) {
1022                                 F2FS_OPTION(sbi).fsync_mode =
1023                                                         FSYNC_MODE_NOBARRIER;
1024                         } else {
1025                                 kfree(name);
1026                                 return -EINVAL;
1027                         }
1028                         kfree(name);
1029                         break;
1030                 case Opt_test_dummy_encryption:
1031                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1032                                                              is_remount);
1033                         if (ret)
1034                                 return ret;
1035                         break;
1036                 case Opt_inlinecrypt:
1037 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1038                         sb->s_flags |= SB_INLINECRYPT;
1039 #else
1040                         f2fs_info(sbi, "inline encryption not supported");
1041 #endif
1042                         break;
1043                 case Opt_checkpoint_disable_cap_perc:
1044                         if (args->from && match_int(args, &arg))
1045                                 return -EINVAL;
1046                         if (arg < 0 || arg > 100)
1047                                 return -EINVAL;
1048                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1049                         set_opt(sbi, DISABLE_CHECKPOINT);
1050                         break;
1051                 case Opt_checkpoint_disable_cap:
1052                         if (args->from && match_int(args, &arg))
1053                                 return -EINVAL;
1054                         F2FS_OPTION(sbi).unusable_cap = arg;
1055                         set_opt(sbi, DISABLE_CHECKPOINT);
1056                         break;
1057                 case Opt_checkpoint_disable:
1058                         set_opt(sbi, DISABLE_CHECKPOINT);
1059                         break;
1060                 case Opt_checkpoint_enable:
1061                         clear_opt(sbi, DISABLE_CHECKPOINT);
1062                         break;
1063                 case Opt_checkpoint_merge:
1064                         set_opt(sbi, MERGE_CHECKPOINT);
1065                         break;
1066                 case Opt_nocheckpoint_merge:
1067                         clear_opt(sbi, MERGE_CHECKPOINT);
1068                         break;
1069 #ifdef CONFIG_F2FS_FS_COMPRESSION
1070                 case Opt_compress_algorithm:
1071                         if (!f2fs_sb_has_compression(sbi)) {
1072                                 f2fs_info(sbi, "Image doesn't support compression");
1073                                 break;
1074                         }
1075                         name = match_strdup(&args[0]);
1076                         if (!name)
1077                                 return -ENOMEM;
1078                         if (!strcmp(name, "lzo")) {
1079 #ifdef CONFIG_F2FS_FS_LZO
1080                                 F2FS_OPTION(sbi).compress_level = 0;
1081                                 F2FS_OPTION(sbi).compress_algorithm =
1082                                                                 COMPRESS_LZO;
1083 #else
1084                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1085 #endif
1086                         } else if (!strncmp(name, "lz4", 3)) {
1087 #ifdef CONFIG_F2FS_FS_LZ4
1088                                 ret = f2fs_set_lz4hc_level(sbi, name);
1089                                 if (ret) {
1090                                         kfree(name);
1091                                         return -EINVAL;
1092                                 }
1093                                 F2FS_OPTION(sbi).compress_algorithm =
1094                                                                 COMPRESS_LZ4;
1095 #else
1096                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1097 #endif
1098                         } else if (!strncmp(name, "zstd", 4)) {
1099 #ifdef CONFIG_F2FS_FS_ZSTD
1100                                 ret = f2fs_set_zstd_level(sbi, name);
1101                                 if (ret) {
1102                                         kfree(name);
1103                                         return -EINVAL;
1104                                 }
1105                                 F2FS_OPTION(sbi).compress_algorithm =
1106                                                                 COMPRESS_ZSTD;
1107 #else
1108                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1109 #endif
1110                         } else if (!strcmp(name, "lzo-rle")) {
1111 #ifdef CONFIG_F2FS_FS_LZORLE
1112                                 F2FS_OPTION(sbi).compress_level = 0;
1113                                 F2FS_OPTION(sbi).compress_algorithm =
1114                                                                 COMPRESS_LZORLE;
1115 #else
1116                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1117 #endif
1118                         } else {
1119                                 kfree(name);
1120                                 return -EINVAL;
1121                         }
1122                         kfree(name);
1123                         break;
1124                 case Opt_compress_log_size:
1125                         if (!f2fs_sb_has_compression(sbi)) {
1126                                 f2fs_info(sbi, "Image doesn't support compression");
1127                                 break;
1128                         }
1129                         if (args->from && match_int(args, &arg))
1130                                 return -EINVAL;
1131                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1132                                 arg > MAX_COMPRESS_LOG_SIZE) {
1133                                 f2fs_err(sbi,
1134                                         "Compress cluster log size is out of range");
1135                                 return -EINVAL;
1136                         }
1137                         F2FS_OPTION(sbi).compress_log_size = arg;
1138                         break;
1139                 case Opt_compress_extension:
1140                         if (!f2fs_sb_has_compression(sbi)) {
1141                                 f2fs_info(sbi, "Image doesn't support compression");
1142                                 break;
1143                         }
1144                         name = match_strdup(&args[0]);
1145                         if (!name)
1146                                 return -ENOMEM;
1147
1148                         ext = F2FS_OPTION(sbi).extensions;
1149                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1150
1151                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1152                                 ext_cnt >= COMPRESS_EXT_NUM) {
1153                                 f2fs_err(sbi,
1154                                         "invalid extension length/number");
1155                                 kfree(name);
1156                                 return -EINVAL;
1157                         }
1158
1159                         strcpy(ext[ext_cnt], name);
1160                         F2FS_OPTION(sbi).compress_ext_cnt++;
1161                         kfree(name);
1162                         break;
1163                 case Opt_nocompress_extension:
1164                         if (!f2fs_sb_has_compression(sbi)) {
1165                                 f2fs_info(sbi, "Image doesn't support compression");
1166                                 break;
1167                         }
1168                         name = match_strdup(&args[0]);
1169                         if (!name)
1170                                 return -ENOMEM;
1171
1172                         noext = F2FS_OPTION(sbi).noextensions;
1173                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1174
1175                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1176                                 noext_cnt >= COMPRESS_EXT_NUM) {
1177                                 f2fs_err(sbi,
1178                                         "invalid extension length/number");
1179                                 kfree(name);
1180                                 return -EINVAL;
1181                         }
1182
1183                         strcpy(noext[noext_cnt], name);
1184                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1185                         kfree(name);
1186                         break;
1187                 case Opt_compress_chksum:
1188                         F2FS_OPTION(sbi).compress_chksum = true;
1189                         break;
1190                 case Opt_compress_mode:
1191                         name = match_strdup(&args[0]);
1192                         if (!name)
1193                                 return -ENOMEM;
1194                         if (!strcmp(name, "fs")) {
1195                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1196                         } else if (!strcmp(name, "user")) {
1197                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1198                         } else {
1199                                 kfree(name);
1200                                 return -EINVAL;
1201                         }
1202                         kfree(name);
1203                         break;
1204                 case Opt_compress_cache:
1205                         set_opt(sbi, COMPRESS_CACHE);
1206                         break;
1207 #else
1208                 case Opt_compress_algorithm:
1209                 case Opt_compress_log_size:
1210                 case Opt_compress_extension:
1211                 case Opt_nocompress_extension:
1212                 case Opt_compress_chksum:
1213                 case Opt_compress_mode:
1214                 case Opt_compress_cache:
1215                         f2fs_info(sbi, "compression options not supported");
1216                         break;
1217 #endif
1218                 case Opt_atgc:
1219                         set_opt(sbi, ATGC);
1220                         break;
1221                 case Opt_gc_merge:
1222                         set_opt(sbi, GC_MERGE);
1223                         break;
1224                 case Opt_nogc_merge:
1225                         clear_opt(sbi, GC_MERGE);
1226                         break;
1227                 case Opt_discard_unit:
1228                         name = match_strdup(&args[0]);
1229                         if (!name)
1230                                 return -ENOMEM;
1231                         if (!strcmp(name, "block")) {
1232                                 F2FS_OPTION(sbi).discard_unit =
1233                                                 DISCARD_UNIT_BLOCK;
1234                         } else if (!strcmp(name, "segment")) {
1235                                 F2FS_OPTION(sbi).discard_unit =
1236                                                 DISCARD_UNIT_SEGMENT;
1237                         } else if (!strcmp(name, "section")) {
1238                                 F2FS_OPTION(sbi).discard_unit =
1239                                                 DISCARD_UNIT_SECTION;
1240                         } else {
1241                                 kfree(name);
1242                                 return -EINVAL;
1243                         }
1244                         kfree(name);
1245                         break;
1246                 case Opt_memory_mode:
1247                         name = match_strdup(&args[0]);
1248                         if (!name)
1249                                 return -ENOMEM;
1250                         if (!strcmp(name, "normal")) {
1251                                 F2FS_OPTION(sbi).memory_mode =
1252                                                 MEMORY_MODE_NORMAL;
1253                         } else if (!strcmp(name, "low")) {
1254                                 F2FS_OPTION(sbi).memory_mode =
1255                                                 MEMORY_MODE_LOW;
1256                         } else {
1257                                 kfree(name);
1258                                 return -EINVAL;
1259                         }
1260                         kfree(name);
1261                         break;
1262                 case Opt_age_extent_cache:
1263                         set_opt(sbi, AGE_EXTENT_CACHE);
1264                         break;
1265                 default:
1266                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1267                                  p);
1268                         return -EINVAL;
1269                 }
1270         }
1271 default_check:
1272 #ifdef CONFIG_QUOTA
1273         if (f2fs_check_quota_options(sbi))
1274                 return -EINVAL;
1275 #else
1276         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1277                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1278                 return -EINVAL;
1279         }
1280         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1281                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1282                 return -EINVAL;
1283         }
1284 #endif
1285 #if !IS_ENABLED(CONFIG_UNICODE)
1286         if (f2fs_sb_has_casefold(sbi)) {
1287                 f2fs_err(sbi,
1288                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1289                 return -EINVAL;
1290         }
1291 #endif
1292         /*
1293          * The BLKZONED feature indicates that the drive was formatted with
1294          * zone alignment optimization. This is optional for host-aware
1295          * devices, but mandatory for host-managed zoned block devices.
1296          */
1297         if (f2fs_sb_has_blkzoned(sbi)) {
1298 #ifdef CONFIG_BLK_DEV_ZONED
1299                 if (F2FS_OPTION(sbi).discard_unit !=
1300                                                 DISCARD_UNIT_SECTION) {
1301                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1302                         F2FS_OPTION(sbi).discard_unit =
1303                                         DISCARD_UNIT_SECTION;
1304                 }
1305 #else
1306                 f2fs_err(sbi, "Zoned block device support is not enabled");
1307                 return -EINVAL;
1308 #endif
1309         }
1310
1311 #ifdef CONFIG_F2FS_FS_COMPRESSION
1312         if (f2fs_test_compress_extension(sbi)) {
1313                 f2fs_err(sbi, "invalid compress or nocompress extension");
1314                 return -EINVAL;
1315         }
1316 #endif
1317
1318         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1319                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1320                          F2FS_IO_SIZE_KB(sbi));
1321                 return -EINVAL;
1322         }
1323
1324         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1325                 int min_size, max_size;
1326
1327                 if (!f2fs_sb_has_extra_attr(sbi) ||
1328                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1329                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1330                         return -EINVAL;
1331                 }
1332                 if (!test_opt(sbi, INLINE_XATTR)) {
1333                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1334                         return -EINVAL;
1335                 }
1336
1337                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1338                 max_size = MAX_INLINE_XATTR_SIZE;
1339
1340                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1341                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1342                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1343                                  min_size, max_size);
1344                         return -EINVAL;
1345                 }
1346         }
1347
1348         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1349                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1350                 return -EINVAL;
1351         }
1352
1353         if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1354                 f2fs_err(sbi, "LFS not compatible with ATGC");
1355                 return -EINVAL;
1356         }
1357
1358         if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1359                 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1360                 return -EINVAL;
1361         }
1362
1363         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1364                 f2fs_err(sbi, "Allow to mount readonly mode only");
1365                 return -EROFS;
1366         }
1367         return 0;
1368 }
1369
1370 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1371 {
1372         struct f2fs_inode_info *fi;
1373
1374         if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC)) {
1375                 f2fs_show_injection_info(F2FS_SB(sb), FAULT_SLAB_ALLOC);
1376                 return NULL;
1377         }
1378
1379         fi = alloc_inode_sb(sb, f2fs_inode_cachep, GFP_F2FS_ZERO);
1380         if (!fi)
1381                 return NULL;
1382
1383         init_once((void *) fi);
1384
1385         /* Initialize f2fs-specific inode info */
1386         atomic_set(&fi->dirty_pages, 0);
1387         atomic_set(&fi->i_compr_blocks, 0);
1388         init_f2fs_rwsem(&fi->i_sem);
1389         spin_lock_init(&fi->i_size_lock);
1390         INIT_LIST_HEAD(&fi->dirty_list);
1391         INIT_LIST_HEAD(&fi->gdirty_list);
1392         init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1393         init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1394         init_f2fs_rwsem(&fi->i_xattr_sem);
1395
1396         /* Will be used by directory only */
1397         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1398
1399         return &fi->vfs_inode;
1400 }
1401
1402 static int f2fs_drop_inode(struct inode *inode)
1403 {
1404         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1405         int ret;
1406
1407         /*
1408          * during filesystem shutdown, if checkpoint is disabled,
1409          * drop useless meta/node dirty pages.
1410          */
1411         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1412                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1413                         inode->i_ino == F2FS_META_INO(sbi)) {
1414                         trace_f2fs_drop_inode(inode, 1);
1415                         return 1;
1416                 }
1417         }
1418
1419         /*
1420          * This is to avoid a deadlock condition like below.
1421          * writeback_single_inode(inode)
1422          *  - f2fs_write_data_page
1423          *    - f2fs_gc -> iput -> evict
1424          *       - inode_wait_for_writeback(inode)
1425          */
1426         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1427                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1428                         /* to avoid evict_inode call simultaneously */
1429                         atomic_inc(&inode->i_count);
1430                         spin_unlock(&inode->i_lock);
1431
1432                         f2fs_abort_atomic_write(inode, true);
1433
1434                         /* should remain fi->extent_tree for writepage */
1435                         f2fs_destroy_extent_node(inode);
1436
1437                         sb_start_intwrite(inode->i_sb);
1438                         f2fs_i_size_write(inode, 0);
1439
1440                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1441                                         inode, NULL, 0, DATA);
1442                         truncate_inode_pages_final(inode->i_mapping);
1443
1444                         if (F2FS_HAS_BLOCKS(inode))
1445                                 f2fs_truncate(inode);
1446
1447                         sb_end_intwrite(inode->i_sb);
1448
1449                         spin_lock(&inode->i_lock);
1450                         atomic_dec(&inode->i_count);
1451                 }
1452                 trace_f2fs_drop_inode(inode, 0);
1453                 return 0;
1454         }
1455         ret = generic_drop_inode(inode);
1456         if (!ret)
1457                 ret = fscrypt_drop_inode(inode);
1458         trace_f2fs_drop_inode(inode, ret);
1459         return ret;
1460 }
1461
1462 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1463 {
1464         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1465         int ret = 0;
1466
1467         spin_lock(&sbi->inode_lock[DIRTY_META]);
1468         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1469                 ret = 1;
1470         } else {
1471                 set_inode_flag(inode, FI_DIRTY_INODE);
1472                 stat_inc_dirty_inode(sbi, DIRTY_META);
1473         }
1474         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1475                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1476                                 &sbi->inode_list[DIRTY_META]);
1477                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1478         }
1479         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1480         return ret;
1481 }
1482
1483 void f2fs_inode_synced(struct inode *inode)
1484 {
1485         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1486
1487         spin_lock(&sbi->inode_lock[DIRTY_META]);
1488         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1489                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1490                 return;
1491         }
1492         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1493                 list_del_init(&F2FS_I(inode)->gdirty_list);
1494                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1495         }
1496         clear_inode_flag(inode, FI_DIRTY_INODE);
1497         clear_inode_flag(inode, FI_AUTO_RECOVER);
1498         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1499         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1500 }
1501
1502 /*
1503  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1504  *
1505  * We should call set_dirty_inode to write the dirty inode through write_inode.
1506  */
1507 static void f2fs_dirty_inode(struct inode *inode, int flags)
1508 {
1509         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1510
1511         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1512                         inode->i_ino == F2FS_META_INO(sbi))
1513                 return;
1514
1515         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1516                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1517
1518         f2fs_inode_dirtied(inode, false);
1519 }
1520
1521 static void f2fs_free_inode(struct inode *inode)
1522 {
1523         fscrypt_free_inode(inode);
1524         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1525 }
1526
1527 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1528 {
1529         percpu_counter_destroy(&sbi->total_valid_inode_count);
1530         percpu_counter_destroy(&sbi->rf_node_block_count);
1531         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1532 }
1533
1534 static void destroy_device_list(struct f2fs_sb_info *sbi)
1535 {
1536         int i;
1537
1538         for (i = 0; i < sbi->s_ndevs; i++) {
1539                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1540 #ifdef CONFIG_BLK_DEV_ZONED
1541                 kvfree(FDEV(i).blkz_seq);
1542 #endif
1543         }
1544         kvfree(sbi->devs);
1545 }
1546
1547 static void f2fs_put_super(struct super_block *sb)
1548 {
1549         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1550         int i;
1551         bool dropped;
1552
1553         /* unregister procfs/sysfs entries in advance to avoid race case */
1554         f2fs_unregister_sysfs(sbi);
1555
1556         f2fs_quota_off_umount(sb);
1557
1558         /* prevent remaining shrinker jobs */
1559         mutex_lock(&sbi->umount_mutex);
1560
1561         /*
1562          * flush all issued checkpoints and stop checkpoint issue thread.
1563          * after then, all checkpoints should be done by each process context.
1564          */
1565         f2fs_stop_ckpt_thread(sbi);
1566
1567         /*
1568          * We don't need to do checkpoint when superblock is clean.
1569          * But, the previous checkpoint was not done by umount, it needs to do
1570          * clean checkpoint again.
1571          */
1572         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1573                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1574                 struct cp_control cpc = {
1575                         .reason = CP_UMOUNT,
1576                 };
1577                 f2fs_write_checkpoint(sbi, &cpc);
1578         }
1579
1580         /* be sure to wait for any on-going discard commands */
1581         dropped = f2fs_issue_discard_timeout(sbi);
1582
1583         if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && !dropped) {
1584                 struct cp_control cpc = {
1585                         .reason = CP_UMOUNT | CP_TRIMMED,
1586                 };
1587                 f2fs_write_checkpoint(sbi, &cpc);
1588         }
1589
1590         /*
1591          * normally superblock is clean, so we need to release this.
1592          * In addition, EIO will skip do checkpoint, we need this as well.
1593          */
1594         f2fs_release_ino_entry(sbi, true);
1595
1596         f2fs_leave_shrinker(sbi);
1597         mutex_unlock(&sbi->umount_mutex);
1598
1599         /* our cp_error case, we can wait for any writeback page */
1600         f2fs_flush_merged_writes(sbi);
1601
1602         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1603
1604         f2fs_bug_on(sbi, sbi->fsync_node_num);
1605
1606         f2fs_destroy_compress_inode(sbi);
1607
1608         iput(sbi->node_inode);
1609         sbi->node_inode = NULL;
1610
1611         iput(sbi->meta_inode);
1612         sbi->meta_inode = NULL;
1613
1614         /*
1615          * iput() can update stat information, if f2fs_write_checkpoint()
1616          * above failed with error.
1617          */
1618         f2fs_destroy_stats(sbi);
1619
1620         /* destroy f2fs internal modules */
1621         f2fs_destroy_node_manager(sbi);
1622         f2fs_destroy_segment_manager(sbi);
1623
1624         f2fs_destroy_post_read_wq(sbi);
1625
1626         kvfree(sbi->ckpt);
1627
1628         sb->s_fs_info = NULL;
1629         if (sbi->s_chksum_driver)
1630                 crypto_free_shash(sbi->s_chksum_driver);
1631         kfree(sbi->raw_super);
1632
1633         destroy_device_list(sbi);
1634         f2fs_destroy_page_array_cache(sbi);
1635         f2fs_destroy_xattr_caches(sbi);
1636         mempool_destroy(sbi->write_io_dummy);
1637 #ifdef CONFIG_QUOTA
1638         for (i = 0; i < MAXQUOTAS; i++)
1639                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1640 #endif
1641         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1642         destroy_percpu_info(sbi);
1643         f2fs_destroy_iostat(sbi);
1644         for (i = 0; i < NR_PAGE_TYPE; i++)
1645                 kvfree(sbi->write_io[i]);
1646 #if IS_ENABLED(CONFIG_UNICODE)
1647         utf8_unload(sb->s_encoding);
1648 #endif
1649         kfree(sbi);
1650 }
1651
1652 int f2fs_sync_fs(struct super_block *sb, int sync)
1653 {
1654         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1655         int err = 0;
1656
1657         if (unlikely(f2fs_cp_error(sbi)))
1658                 return 0;
1659         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1660                 return 0;
1661
1662         trace_f2fs_sync_fs(sb, sync);
1663
1664         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1665                 return -EAGAIN;
1666
1667         if (sync)
1668                 err = f2fs_issue_checkpoint(sbi);
1669
1670         return err;
1671 }
1672
1673 static int f2fs_freeze(struct super_block *sb)
1674 {
1675         if (f2fs_readonly(sb))
1676                 return 0;
1677
1678         /* IO error happened before */
1679         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1680                 return -EIO;
1681
1682         /* must be clean, since sync_filesystem() was already called */
1683         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1684                 return -EINVAL;
1685
1686         /* Let's flush checkpoints and stop the thread. */
1687         f2fs_flush_ckpt_thread(F2FS_SB(sb));
1688
1689         /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1690         set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1691         return 0;
1692 }
1693
1694 static int f2fs_unfreeze(struct super_block *sb)
1695 {
1696         clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1697         return 0;
1698 }
1699
1700 #ifdef CONFIG_QUOTA
1701 static int f2fs_statfs_project(struct super_block *sb,
1702                                 kprojid_t projid, struct kstatfs *buf)
1703 {
1704         struct kqid qid;
1705         struct dquot *dquot;
1706         u64 limit;
1707         u64 curblock;
1708
1709         qid = make_kqid_projid(projid);
1710         dquot = dqget(sb, qid);
1711         if (IS_ERR(dquot))
1712                 return PTR_ERR(dquot);
1713         spin_lock(&dquot->dq_dqb_lock);
1714
1715         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1716                                         dquot->dq_dqb.dqb_bhardlimit);
1717         if (limit)
1718                 limit >>= sb->s_blocksize_bits;
1719
1720         if (limit && buf->f_blocks > limit) {
1721                 curblock = (dquot->dq_dqb.dqb_curspace +
1722                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1723                 buf->f_blocks = limit;
1724                 buf->f_bfree = buf->f_bavail =
1725                         (buf->f_blocks > curblock) ?
1726                          (buf->f_blocks - curblock) : 0;
1727         }
1728
1729         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1730                                         dquot->dq_dqb.dqb_ihardlimit);
1731
1732         if (limit && buf->f_files > limit) {
1733                 buf->f_files = limit;
1734                 buf->f_ffree =
1735                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1736                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1737         }
1738
1739         spin_unlock(&dquot->dq_dqb_lock);
1740         dqput(dquot);
1741         return 0;
1742 }
1743 #endif
1744
1745 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1746 {
1747         struct super_block *sb = dentry->d_sb;
1748         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1749         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1750         block_t total_count, user_block_count, start_count;
1751         u64 avail_node_count;
1752         unsigned int total_valid_node_count;
1753
1754         total_count = le64_to_cpu(sbi->raw_super->block_count);
1755         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1756         buf->f_type = F2FS_SUPER_MAGIC;
1757         buf->f_bsize = sbi->blocksize;
1758
1759         buf->f_blocks = total_count - start_count;
1760
1761         spin_lock(&sbi->stat_lock);
1762
1763         user_block_count = sbi->user_block_count;
1764         total_valid_node_count = valid_node_count(sbi);
1765         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1766         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1767                                                 sbi->current_reserved_blocks;
1768
1769         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1770                 buf->f_bfree = 0;
1771         else
1772                 buf->f_bfree -= sbi->unusable_block_count;
1773         spin_unlock(&sbi->stat_lock);
1774
1775         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1776                 buf->f_bavail = buf->f_bfree -
1777                                 F2FS_OPTION(sbi).root_reserved_blocks;
1778         else
1779                 buf->f_bavail = 0;
1780
1781         if (avail_node_count > user_block_count) {
1782                 buf->f_files = user_block_count;
1783                 buf->f_ffree = buf->f_bavail;
1784         } else {
1785                 buf->f_files = avail_node_count;
1786                 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1787                                         buf->f_bavail);
1788         }
1789
1790         buf->f_namelen = F2FS_NAME_LEN;
1791         buf->f_fsid    = u64_to_fsid(id);
1792
1793 #ifdef CONFIG_QUOTA
1794         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1795                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1796                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1797         }
1798 #endif
1799         return 0;
1800 }
1801
1802 static inline void f2fs_show_quota_options(struct seq_file *seq,
1803                                            struct super_block *sb)
1804 {
1805 #ifdef CONFIG_QUOTA
1806         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1807
1808         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1809                 char *fmtname = "";
1810
1811                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1812                 case QFMT_VFS_OLD:
1813                         fmtname = "vfsold";
1814                         break;
1815                 case QFMT_VFS_V0:
1816                         fmtname = "vfsv0";
1817                         break;
1818                 case QFMT_VFS_V1:
1819                         fmtname = "vfsv1";
1820                         break;
1821                 }
1822                 seq_printf(seq, ",jqfmt=%s", fmtname);
1823         }
1824
1825         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1826                 seq_show_option(seq, "usrjquota",
1827                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1828
1829         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1830                 seq_show_option(seq, "grpjquota",
1831                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1832
1833         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1834                 seq_show_option(seq, "prjjquota",
1835                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1836 #endif
1837 }
1838
1839 #ifdef CONFIG_F2FS_FS_COMPRESSION
1840 static inline void f2fs_show_compress_options(struct seq_file *seq,
1841                                                         struct super_block *sb)
1842 {
1843         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1844         char *algtype = "";
1845         int i;
1846
1847         if (!f2fs_sb_has_compression(sbi))
1848                 return;
1849
1850         switch (F2FS_OPTION(sbi).compress_algorithm) {
1851         case COMPRESS_LZO:
1852                 algtype = "lzo";
1853                 break;
1854         case COMPRESS_LZ4:
1855                 algtype = "lz4";
1856                 break;
1857         case COMPRESS_ZSTD:
1858                 algtype = "zstd";
1859                 break;
1860         case COMPRESS_LZORLE:
1861                 algtype = "lzo-rle";
1862                 break;
1863         }
1864         seq_printf(seq, ",compress_algorithm=%s", algtype);
1865
1866         if (F2FS_OPTION(sbi).compress_level)
1867                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1868
1869         seq_printf(seq, ",compress_log_size=%u",
1870                         F2FS_OPTION(sbi).compress_log_size);
1871
1872         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1873                 seq_printf(seq, ",compress_extension=%s",
1874                         F2FS_OPTION(sbi).extensions[i]);
1875         }
1876
1877         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1878                 seq_printf(seq, ",nocompress_extension=%s",
1879                         F2FS_OPTION(sbi).noextensions[i]);
1880         }
1881
1882         if (F2FS_OPTION(sbi).compress_chksum)
1883                 seq_puts(seq, ",compress_chksum");
1884
1885         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1886                 seq_printf(seq, ",compress_mode=%s", "fs");
1887         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1888                 seq_printf(seq, ",compress_mode=%s", "user");
1889
1890         if (test_opt(sbi, COMPRESS_CACHE))
1891                 seq_puts(seq, ",compress_cache");
1892 }
1893 #endif
1894
1895 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1896 {
1897         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1898
1899         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1900                 seq_printf(seq, ",background_gc=%s", "sync");
1901         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1902                 seq_printf(seq, ",background_gc=%s", "on");
1903         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1904                 seq_printf(seq, ",background_gc=%s", "off");
1905
1906         if (test_opt(sbi, GC_MERGE))
1907                 seq_puts(seq, ",gc_merge");
1908
1909         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1910                 seq_puts(seq, ",disable_roll_forward");
1911         if (test_opt(sbi, NORECOVERY))
1912                 seq_puts(seq, ",norecovery");
1913         if (test_opt(sbi, DISCARD))
1914                 seq_puts(seq, ",discard");
1915         else
1916                 seq_puts(seq, ",nodiscard");
1917         if (test_opt(sbi, NOHEAP))
1918                 seq_puts(seq, ",no_heap");
1919         else
1920                 seq_puts(seq, ",heap");
1921 #ifdef CONFIG_F2FS_FS_XATTR
1922         if (test_opt(sbi, XATTR_USER))
1923                 seq_puts(seq, ",user_xattr");
1924         else
1925                 seq_puts(seq, ",nouser_xattr");
1926         if (test_opt(sbi, INLINE_XATTR))
1927                 seq_puts(seq, ",inline_xattr");
1928         else
1929                 seq_puts(seq, ",noinline_xattr");
1930         if (test_opt(sbi, INLINE_XATTR_SIZE))
1931                 seq_printf(seq, ",inline_xattr_size=%u",
1932                                         F2FS_OPTION(sbi).inline_xattr_size);
1933 #endif
1934 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1935         if (test_opt(sbi, POSIX_ACL))
1936                 seq_puts(seq, ",acl");
1937         else
1938                 seq_puts(seq, ",noacl");
1939 #endif
1940         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1941                 seq_puts(seq, ",disable_ext_identify");
1942         if (test_opt(sbi, INLINE_DATA))
1943                 seq_puts(seq, ",inline_data");
1944         else
1945                 seq_puts(seq, ",noinline_data");
1946         if (test_opt(sbi, INLINE_DENTRY))
1947                 seq_puts(seq, ",inline_dentry");
1948         else
1949                 seq_puts(seq, ",noinline_dentry");
1950         if (test_opt(sbi, FLUSH_MERGE))
1951                 seq_puts(seq, ",flush_merge");
1952         else
1953                 seq_puts(seq, ",noflush_merge");
1954         if (test_opt(sbi, NOBARRIER))
1955                 seq_puts(seq, ",nobarrier");
1956         else
1957                 seq_puts(seq, ",barrier");
1958         if (test_opt(sbi, FASTBOOT))
1959                 seq_puts(seq, ",fastboot");
1960         if (test_opt(sbi, READ_EXTENT_CACHE))
1961                 seq_puts(seq, ",extent_cache");
1962         else
1963                 seq_puts(seq, ",noextent_cache");
1964         if (test_opt(sbi, AGE_EXTENT_CACHE))
1965                 seq_puts(seq, ",age_extent_cache");
1966         if (test_opt(sbi, DATA_FLUSH))
1967                 seq_puts(seq, ",data_flush");
1968
1969         seq_puts(seq, ",mode=");
1970         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1971                 seq_puts(seq, "adaptive");
1972         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1973                 seq_puts(seq, "lfs");
1974         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
1975                 seq_puts(seq, "fragment:segment");
1976         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
1977                 seq_puts(seq, "fragment:block");
1978         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1979         if (test_opt(sbi, RESERVE_ROOT))
1980                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1981                                 F2FS_OPTION(sbi).root_reserved_blocks,
1982                                 from_kuid_munged(&init_user_ns,
1983                                         F2FS_OPTION(sbi).s_resuid),
1984                                 from_kgid_munged(&init_user_ns,
1985                                         F2FS_OPTION(sbi).s_resgid));
1986         if (F2FS_IO_SIZE_BITS(sbi))
1987                 seq_printf(seq, ",io_bits=%u",
1988                                 F2FS_OPTION(sbi).write_io_size_bits);
1989 #ifdef CONFIG_F2FS_FAULT_INJECTION
1990         if (test_opt(sbi, FAULT_INJECTION)) {
1991                 seq_printf(seq, ",fault_injection=%u",
1992                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1993                 seq_printf(seq, ",fault_type=%u",
1994                                 F2FS_OPTION(sbi).fault_info.inject_type);
1995         }
1996 #endif
1997 #ifdef CONFIG_QUOTA
1998         if (test_opt(sbi, QUOTA))
1999                 seq_puts(seq, ",quota");
2000         if (test_opt(sbi, USRQUOTA))
2001                 seq_puts(seq, ",usrquota");
2002         if (test_opt(sbi, GRPQUOTA))
2003                 seq_puts(seq, ",grpquota");
2004         if (test_opt(sbi, PRJQUOTA))
2005                 seq_puts(seq, ",prjquota");
2006 #endif
2007         f2fs_show_quota_options(seq, sbi->sb);
2008
2009         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2010
2011         if (sbi->sb->s_flags & SB_INLINECRYPT)
2012                 seq_puts(seq, ",inlinecrypt");
2013
2014         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2015                 seq_printf(seq, ",alloc_mode=%s", "default");
2016         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2017                 seq_printf(seq, ",alloc_mode=%s", "reuse");
2018
2019         if (test_opt(sbi, DISABLE_CHECKPOINT))
2020                 seq_printf(seq, ",checkpoint=disable:%u",
2021                                 F2FS_OPTION(sbi).unusable_cap);
2022         if (test_opt(sbi, MERGE_CHECKPOINT))
2023                 seq_puts(seq, ",checkpoint_merge");
2024         else
2025                 seq_puts(seq, ",nocheckpoint_merge");
2026         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2027                 seq_printf(seq, ",fsync_mode=%s", "posix");
2028         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2029                 seq_printf(seq, ",fsync_mode=%s", "strict");
2030         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2031                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2032
2033 #ifdef CONFIG_F2FS_FS_COMPRESSION
2034         f2fs_show_compress_options(seq, sbi->sb);
2035 #endif
2036
2037         if (test_opt(sbi, ATGC))
2038                 seq_puts(seq, ",atgc");
2039
2040         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2041                 seq_printf(seq, ",discard_unit=%s", "block");
2042         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2043                 seq_printf(seq, ",discard_unit=%s", "segment");
2044         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2045                 seq_printf(seq, ",discard_unit=%s", "section");
2046
2047         if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2048                 seq_printf(seq, ",memory=%s", "normal");
2049         else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2050                 seq_printf(seq, ",memory=%s", "low");
2051
2052         return 0;
2053 }
2054
2055 static void default_options(struct f2fs_sb_info *sbi)
2056 {
2057         /* init some FS parameters */
2058         if (f2fs_sb_has_readonly(sbi))
2059                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2060         else
2061                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2062
2063         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2064         if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2065                                                         SMALL_VOLUME_SEGMENTS)
2066                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2067         else
2068                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2069         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2070         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2071         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2072         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2073         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2074         F2FS_OPTION(sbi).compress_ext_cnt = 0;
2075         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2076         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2077         F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2078
2079         sbi->sb->s_flags &= ~SB_INLINECRYPT;
2080
2081         set_opt(sbi, INLINE_XATTR);
2082         set_opt(sbi, INLINE_DATA);
2083         set_opt(sbi, INLINE_DENTRY);
2084         set_opt(sbi, READ_EXTENT_CACHE);
2085         set_opt(sbi, NOHEAP);
2086         clear_opt(sbi, DISABLE_CHECKPOINT);
2087         set_opt(sbi, MERGE_CHECKPOINT);
2088         F2FS_OPTION(sbi).unusable_cap = 0;
2089         sbi->sb->s_flags |= SB_LAZYTIME;
2090         if (!f2fs_is_readonly(sbi))
2091                 set_opt(sbi, FLUSH_MERGE);
2092         if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2093                 set_opt(sbi, DISCARD);
2094         if (f2fs_sb_has_blkzoned(sbi)) {
2095                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2096                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2097         } else {
2098                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2099                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2100         }
2101
2102 #ifdef CONFIG_F2FS_FS_XATTR
2103         set_opt(sbi, XATTR_USER);
2104 #endif
2105 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2106         set_opt(sbi, POSIX_ACL);
2107 #endif
2108
2109         f2fs_build_fault_attr(sbi, 0, 0);
2110 }
2111
2112 #ifdef CONFIG_QUOTA
2113 static int f2fs_enable_quotas(struct super_block *sb);
2114 #endif
2115
2116 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2117 {
2118         unsigned int s_flags = sbi->sb->s_flags;
2119         struct cp_control cpc;
2120         unsigned int gc_mode = sbi->gc_mode;
2121         int err = 0;
2122         int ret;
2123         block_t unusable;
2124
2125         if (s_flags & SB_RDONLY) {
2126                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2127                 return -EINVAL;
2128         }
2129         sbi->sb->s_flags |= SB_ACTIVE;
2130
2131         /* check if we need more GC first */
2132         unusable = f2fs_get_unusable_blocks(sbi);
2133         if (!f2fs_disable_cp_again(sbi, unusable))
2134                 goto skip_gc;
2135
2136         f2fs_update_time(sbi, DISABLE_TIME);
2137
2138         sbi->gc_mode = GC_URGENT_HIGH;
2139
2140         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2141                 struct f2fs_gc_control gc_control = {
2142                         .victim_segno = NULL_SEGNO,
2143                         .init_gc_type = FG_GC,
2144                         .should_migrate_blocks = false,
2145                         .err_gc_skipped = true,
2146                         .nr_free_secs = 1 };
2147
2148                 f2fs_down_write(&sbi->gc_lock);
2149                 err = f2fs_gc(sbi, &gc_control);
2150                 if (err == -ENODATA) {
2151                         err = 0;
2152                         break;
2153                 }
2154                 if (err && err != -EAGAIN)
2155                         break;
2156         }
2157
2158         ret = sync_filesystem(sbi->sb);
2159         if (ret || err) {
2160                 err = ret ? ret : err;
2161                 goto restore_flag;
2162         }
2163
2164         unusable = f2fs_get_unusable_blocks(sbi);
2165         if (f2fs_disable_cp_again(sbi, unusable)) {
2166                 err = -EAGAIN;
2167                 goto restore_flag;
2168         }
2169
2170 skip_gc:
2171         f2fs_down_write(&sbi->gc_lock);
2172         cpc.reason = CP_PAUSE;
2173         set_sbi_flag(sbi, SBI_CP_DISABLED);
2174         err = f2fs_write_checkpoint(sbi, &cpc);
2175         if (err)
2176                 goto out_unlock;
2177
2178         spin_lock(&sbi->stat_lock);
2179         sbi->unusable_block_count = unusable;
2180         spin_unlock(&sbi->stat_lock);
2181
2182 out_unlock:
2183         f2fs_up_write(&sbi->gc_lock);
2184 restore_flag:
2185         sbi->gc_mode = gc_mode;
2186         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2187         return err;
2188 }
2189
2190 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2191 {
2192         int retry = DEFAULT_RETRY_IO_COUNT;
2193
2194         /* we should flush all the data to keep data consistency */
2195         do {
2196                 sync_inodes_sb(sbi->sb);
2197                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2198         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2199
2200         if (unlikely(retry < 0))
2201                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2202
2203         f2fs_down_write(&sbi->gc_lock);
2204         f2fs_dirty_to_prefree(sbi);
2205
2206         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2207         set_sbi_flag(sbi, SBI_IS_DIRTY);
2208         f2fs_up_write(&sbi->gc_lock);
2209
2210         f2fs_sync_fs(sbi->sb, 1);
2211
2212         /* Let's ensure there's no pending checkpoint anymore */
2213         f2fs_flush_ckpt_thread(sbi);
2214 }
2215
2216 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2217 {
2218         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2219         struct f2fs_mount_info org_mount_opt;
2220         unsigned long old_sb_flags;
2221         int err;
2222         bool need_restart_gc = false, need_stop_gc = false;
2223         bool need_restart_ckpt = false, need_stop_ckpt = false;
2224         bool need_restart_flush = false, need_stop_flush = false;
2225         bool need_restart_discard = false, need_stop_discard = false;
2226         bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2227         bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2228         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2229         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2230         bool no_atgc = !test_opt(sbi, ATGC);
2231         bool no_discard = !test_opt(sbi, DISCARD);
2232         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2233         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2234 #ifdef CONFIG_QUOTA
2235         int i, j;
2236 #endif
2237
2238         /*
2239          * Save the old mount options in case we
2240          * need to restore them.
2241          */
2242         org_mount_opt = sbi->mount_opt;
2243         old_sb_flags = sb->s_flags;
2244
2245 #ifdef CONFIG_QUOTA
2246         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2247         for (i = 0; i < MAXQUOTAS; i++) {
2248                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2249                         org_mount_opt.s_qf_names[i] =
2250                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2251                                 GFP_KERNEL);
2252                         if (!org_mount_opt.s_qf_names[i]) {
2253                                 for (j = 0; j < i; j++)
2254                                         kfree(org_mount_opt.s_qf_names[j]);
2255                                 return -ENOMEM;
2256                         }
2257                 } else {
2258                         org_mount_opt.s_qf_names[i] = NULL;
2259                 }
2260         }
2261 #endif
2262
2263         /* recover superblocks we couldn't write due to previous RO mount */
2264         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2265                 err = f2fs_commit_super(sbi, false);
2266                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2267                           err);
2268                 if (!err)
2269                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2270         }
2271
2272         default_options(sbi);
2273
2274         /* parse mount options */
2275         err = parse_options(sb, data, true);
2276         if (err)
2277                 goto restore_opts;
2278
2279         /*
2280          * Previous and new state of filesystem is RO,
2281          * so skip checking GC and FLUSH_MERGE conditions.
2282          */
2283         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2284                 goto skip;
2285
2286         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2287                 err = -EROFS;
2288                 goto restore_opts;
2289         }
2290
2291 #ifdef CONFIG_QUOTA
2292         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2293                 err = dquot_suspend(sb, -1);
2294                 if (err < 0)
2295                         goto restore_opts;
2296         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2297                 /* dquot_resume needs RW */
2298                 sb->s_flags &= ~SB_RDONLY;
2299                 if (sb_any_quota_suspended(sb)) {
2300                         dquot_resume(sb, -1);
2301                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2302                         err = f2fs_enable_quotas(sb);
2303                         if (err)
2304                                 goto restore_opts;
2305                 }
2306         }
2307 #endif
2308         /* disallow enable atgc dynamically */
2309         if (no_atgc == !!test_opt(sbi, ATGC)) {
2310                 err = -EINVAL;
2311                 f2fs_warn(sbi, "switch atgc option is not allowed");
2312                 goto restore_opts;
2313         }
2314
2315         /* disallow enable/disable extent_cache dynamically */
2316         if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2317                 err = -EINVAL;
2318                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2319                 goto restore_opts;
2320         }
2321         /* disallow enable/disable age extent_cache dynamically */
2322         if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2323                 err = -EINVAL;
2324                 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2325                 goto restore_opts;
2326         }
2327
2328         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2329                 err = -EINVAL;
2330                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2331                 goto restore_opts;
2332         }
2333
2334         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2335                 err = -EINVAL;
2336                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2337                 goto restore_opts;
2338         }
2339
2340         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2341                 err = -EINVAL;
2342                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2343                 goto restore_opts;
2344         }
2345
2346         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2347                 err = -EINVAL;
2348                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2349                 goto restore_opts;
2350         }
2351
2352         /*
2353          * We stop the GC thread if FS is mounted as RO
2354          * or if background_gc = off is passed in mount
2355          * option. Also sync the filesystem.
2356          */
2357         if ((*flags & SB_RDONLY) ||
2358                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2359                         !test_opt(sbi, GC_MERGE))) {
2360                 if (sbi->gc_thread) {
2361                         f2fs_stop_gc_thread(sbi);
2362                         need_restart_gc = true;
2363                 }
2364         } else if (!sbi->gc_thread) {
2365                 err = f2fs_start_gc_thread(sbi);
2366                 if (err)
2367                         goto restore_opts;
2368                 need_stop_gc = true;
2369         }
2370
2371         if (*flags & SB_RDONLY) {
2372                 sync_inodes_sb(sb);
2373
2374                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2375                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2376                 f2fs_sync_fs(sb, 1);
2377                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2378         }
2379
2380         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2381                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2382                 f2fs_stop_ckpt_thread(sbi);
2383                 need_restart_ckpt = true;
2384         } else {
2385                 /* Flush if the prevous checkpoint, if exists. */
2386                 f2fs_flush_ckpt_thread(sbi);
2387
2388                 err = f2fs_start_ckpt_thread(sbi);
2389                 if (err) {
2390                         f2fs_err(sbi,
2391                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2392                             err);
2393                         goto restore_gc;
2394                 }
2395                 need_stop_ckpt = true;
2396         }
2397
2398         /*
2399          * We stop issue flush thread if FS is mounted as RO
2400          * or if flush_merge is not passed in mount option.
2401          */
2402         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2403                 clear_opt(sbi, FLUSH_MERGE);
2404                 f2fs_destroy_flush_cmd_control(sbi, false);
2405                 need_restart_flush = true;
2406         } else {
2407                 err = f2fs_create_flush_cmd_control(sbi);
2408                 if (err)
2409                         goto restore_ckpt;
2410                 need_stop_flush = true;
2411         }
2412
2413         if (no_discard == !!test_opt(sbi, DISCARD)) {
2414                 if (test_opt(sbi, DISCARD)) {
2415                         err = f2fs_start_discard_thread(sbi);
2416                         if (err)
2417                                 goto restore_flush;
2418                         need_stop_discard = true;
2419                 } else {
2420                         f2fs_stop_discard_thread(sbi);
2421                         f2fs_issue_discard_timeout(sbi);
2422                         need_restart_discard = true;
2423                 }
2424         }
2425
2426         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2427                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2428                         err = f2fs_disable_checkpoint(sbi);
2429                         if (err)
2430                                 goto restore_discard;
2431                 } else {
2432                         f2fs_enable_checkpoint(sbi);
2433                 }
2434         }
2435
2436 skip:
2437 #ifdef CONFIG_QUOTA
2438         /* Release old quota file names */
2439         for (i = 0; i < MAXQUOTAS; i++)
2440                 kfree(org_mount_opt.s_qf_names[i]);
2441 #endif
2442         /* Update the POSIXACL Flag */
2443         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2444                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2445
2446         limit_reserve_root(sbi);
2447         adjust_unusable_cap_perc(sbi);
2448         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2449         return 0;
2450 restore_discard:
2451         if (need_restart_discard) {
2452                 if (f2fs_start_discard_thread(sbi))
2453                         f2fs_warn(sbi, "discard has been stopped");
2454         } else if (need_stop_discard) {
2455                 f2fs_stop_discard_thread(sbi);
2456         }
2457 restore_flush:
2458         if (need_restart_flush) {
2459                 if (f2fs_create_flush_cmd_control(sbi))
2460                         f2fs_warn(sbi, "background flush thread has stopped");
2461         } else if (need_stop_flush) {
2462                 clear_opt(sbi, FLUSH_MERGE);
2463                 f2fs_destroy_flush_cmd_control(sbi, false);
2464         }
2465 restore_ckpt:
2466         if (need_restart_ckpt) {
2467                 if (f2fs_start_ckpt_thread(sbi))
2468                         f2fs_warn(sbi, "background ckpt thread has stopped");
2469         } else if (need_stop_ckpt) {
2470                 f2fs_stop_ckpt_thread(sbi);
2471         }
2472 restore_gc:
2473         if (need_restart_gc) {
2474                 if (f2fs_start_gc_thread(sbi))
2475                         f2fs_warn(sbi, "background gc thread has stopped");
2476         } else if (need_stop_gc) {
2477                 f2fs_stop_gc_thread(sbi);
2478         }
2479 restore_opts:
2480 #ifdef CONFIG_QUOTA
2481         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2482         for (i = 0; i < MAXQUOTAS; i++) {
2483                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2484                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2485         }
2486 #endif
2487         sbi->mount_opt = org_mount_opt;
2488         sb->s_flags = old_sb_flags;
2489         return err;
2490 }
2491
2492 #ifdef CONFIG_QUOTA
2493 /* Read data from quotafile */
2494 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2495                                size_t len, loff_t off)
2496 {
2497         struct inode *inode = sb_dqopt(sb)->files[type];
2498         struct address_space *mapping = inode->i_mapping;
2499         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2500         int offset = off & (sb->s_blocksize - 1);
2501         int tocopy;
2502         size_t toread;
2503         loff_t i_size = i_size_read(inode);
2504         struct page *page;
2505
2506         if (off > i_size)
2507                 return 0;
2508
2509         if (off + len > i_size)
2510                 len = i_size - off;
2511         toread = len;
2512         while (toread > 0) {
2513                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2514 repeat:
2515                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2516                 if (IS_ERR(page)) {
2517                         if (PTR_ERR(page) == -ENOMEM) {
2518                                 memalloc_retry_wait(GFP_NOFS);
2519                                 goto repeat;
2520                         }
2521                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2522                         return PTR_ERR(page);
2523                 }
2524
2525                 lock_page(page);
2526
2527                 if (unlikely(page->mapping != mapping)) {
2528                         f2fs_put_page(page, 1);
2529                         goto repeat;
2530                 }
2531                 if (unlikely(!PageUptodate(page))) {
2532                         f2fs_put_page(page, 1);
2533                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2534                         return -EIO;
2535                 }
2536
2537                 memcpy_from_page(data, page, offset, tocopy);
2538                 f2fs_put_page(page, 1);
2539
2540                 offset = 0;
2541                 toread -= tocopy;
2542                 data += tocopy;
2543                 blkidx++;
2544         }
2545         return len;
2546 }
2547
2548 /* Write to quotafile */
2549 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2550                                 const char *data, size_t len, loff_t off)
2551 {
2552         struct inode *inode = sb_dqopt(sb)->files[type];
2553         struct address_space *mapping = inode->i_mapping;
2554         const struct address_space_operations *a_ops = mapping->a_ops;
2555         int offset = off & (sb->s_blocksize - 1);
2556         size_t towrite = len;
2557         struct page *page;
2558         void *fsdata = NULL;
2559         int err = 0;
2560         int tocopy;
2561
2562         while (towrite > 0) {
2563                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2564                                                                 towrite);
2565 retry:
2566                 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2567                                                         &page, &fsdata);
2568                 if (unlikely(err)) {
2569                         if (err == -ENOMEM) {
2570                                 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2571                                 goto retry;
2572                         }
2573                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2574                         break;
2575                 }
2576
2577                 memcpy_to_page(page, offset, data, tocopy);
2578
2579                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2580                                                 page, fsdata);
2581                 offset = 0;
2582                 towrite -= tocopy;
2583                 off += tocopy;
2584                 data += tocopy;
2585                 cond_resched();
2586         }
2587
2588         if (len == towrite)
2589                 return err;
2590         inode->i_mtime = inode->i_ctime = current_time(inode);
2591         f2fs_mark_inode_dirty_sync(inode, false);
2592         return len - towrite;
2593 }
2594
2595 int f2fs_dquot_initialize(struct inode *inode)
2596 {
2597         if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2598                 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2599                 return -ESRCH;
2600         }
2601
2602         return dquot_initialize(inode);
2603 }
2604
2605 static struct dquot **f2fs_get_dquots(struct inode *inode)
2606 {
2607         return F2FS_I(inode)->i_dquot;
2608 }
2609
2610 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2611 {
2612         return &F2FS_I(inode)->i_reserved_quota;
2613 }
2614
2615 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2616 {
2617         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2618                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2619                 return 0;
2620         }
2621
2622         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2623                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2624 }
2625
2626 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2627 {
2628         int enabled = 0;
2629         int i, err;
2630
2631         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2632                 err = f2fs_enable_quotas(sbi->sb);
2633                 if (err) {
2634                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2635                         return 0;
2636                 }
2637                 return 1;
2638         }
2639
2640         for (i = 0; i < MAXQUOTAS; i++) {
2641                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2642                         err = f2fs_quota_on_mount(sbi, i);
2643                         if (!err) {
2644                                 enabled = 1;
2645                                 continue;
2646                         }
2647                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2648                                  err, i);
2649                 }
2650         }
2651         return enabled;
2652 }
2653
2654 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2655                              unsigned int flags)
2656 {
2657         struct inode *qf_inode;
2658         unsigned long qf_inum;
2659         int err;
2660
2661         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2662
2663         qf_inum = f2fs_qf_ino(sb, type);
2664         if (!qf_inum)
2665                 return -EPERM;
2666
2667         qf_inode = f2fs_iget(sb, qf_inum);
2668         if (IS_ERR(qf_inode)) {
2669                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2670                 return PTR_ERR(qf_inode);
2671         }
2672
2673         /* Don't account quota for quota files to avoid recursion */
2674         qf_inode->i_flags |= S_NOQUOTA;
2675         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2676         iput(qf_inode);
2677         return err;
2678 }
2679
2680 static int f2fs_enable_quotas(struct super_block *sb)
2681 {
2682         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2683         int type, err = 0;
2684         unsigned long qf_inum;
2685         bool quota_mopt[MAXQUOTAS] = {
2686                 test_opt(sbi, USRQUOTA),
2687                 test_opt(sbi, GRPQUOTA),
2688                 test_opt(sbi, PRJQUOTA),
2689         };
2690
2691         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2692                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2693                 return 0;
2694         }
2695
2696         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2697
2698         for (type = 0; type < MAXQUOTAS; type++) {
2699                 qf_inum = f2fs_qf_ino(sb, type);
2700                 if (qf_inum) {
2701                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2702                                 DQUOT_USAGE_ENABLED |
2703                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2704                         if (err) {
2705                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2706                                          type, err);
2707                                 for (type--; type >= 0; type--)
2708                                         dquot_quota_off(sb, type);
2709                                 set_sbi_flag(F2FS_SB(sb),
2710                                                 SBI_QUOTA_NEED_REPAIR);
2711                                 return err;
2712                         }
2713                 }
2714         }
2715         return 0;
2716 }
2717
2718 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2719 {
2720         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2721         struct address_space *mapping = dqopt->files[type]->i_mapping;
2722         int ret = 0;
2723
2724         ret = dquot_writeback_dquots(sbi->sb, type);
2725         if (ret)
2726                 goto out;
2727
2728         ret = filemap_fdatawrite(mapping);
2729         if (ret)
2730                 goto out;
2731
2732         /* if we are using journalled quota */
2733         if (is_journalled_quota(sbi))
2734                 goto out;
2735
2736         ret = filemap_fdatawait(mapping);
2737
2738         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2739 out:
2740         if (ret)
2741                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2742         return ret;
2743 }
2744
2745 int f2fs_quota_sync(struct super_block *sb, int type)
2746 {
2747         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2748         struct quota_info *dqopt = sb_dqopt(sb);
2749         int cnt;
2750         int ret = 0;
2751
2752         /*
2753          * Now when everything is written we can discard the pagecache so
2754          * that userspace sees the changes.
2755          */
2756         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2757
2758                 if (type != -1 && cnt != type)
2759                         continue;
2760
2761                 if (!sb_has_quota_active(sb, cnt))
2762                         continue;
2763
2764                 if (!f2fs_sb_has_quota_ino(sbi))
2765                         inode_lock(dqopt->files[cnt]);
2766
2767                 /*
2768                  * do_quotactl
2769                  *  f2fs_quota_sync
2770                  *  f2fs_down_read(quota_sem)
2771                  *  dquot_writeback_dquots()
2772                  *  f2fs_dquot_commit
2773                  *                            block_operation
2774                  *                            f2fs_down_read(quota_sem)
2775                  */
2776                 f2fs_lock_op(sbi);
2777                 f2fs_down_read(&sbi->quota_sem);
2778
2779                 ret = f2fs_quota_sync_file(sbi, cnt);
2780
2781                 f2fs_up_read(&sbi->quota_sem);
2782                 f2fs_unlock_op(sbi);
2783
2784                 if (!f2fs_sb_has_quota_ino(sbi))
2785                         inode_unlock(dqopt->files[cnt]);
2786
2787                 if (ret)
2788                         break;
2789         }
2790         return ret;
2791 }
2792
2793 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2794                                                         const struct path *path)
2795 {
2796         struct inode *inode;
2797         int err;
2798
2799         /* if quota sysfile exists, deny enabling quota with specific file */
2800         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2801                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2802                 return -EBUSY;
2803         }
2804
2805         err = f2fs_quota_sync(sb, type);
2806         if (err)
2807                 return err;
2808
2809         err = dquot_quota_on(sb, type, format_id, path);
2810         if (err)
2811                 return err;
2812
2813         inode = d_inode(path->dentry);
2814
2815         inode_lock(inode);
2816         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2817         f2fs_set_inode_flags(inode);
2818         inode_unlock(inode);
2819         f2fs_mark_inode_dirty_sync(inode, false);
2820
2821         return 0;
2822 }
2823
2824 static int __f2fs_quota_off(struct super_block *sb, int type)
2825 {
2826         struct inode *inode = sb_dqopt(sb)->files[type];
2827         int err;
2828
2829         if (!inode || !igrab(inode))
2830                 return dquot_quota_off(sb, type);
2831
2832         err = f2fs_quota_sync(sb, type);
2833         if (err)
2834                 goto out_put;
2835
2836         err = dquot_quota_off(sb, type);
2837         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2838                 goto out_put;
2839
2840         inode_lock(inode);
2841         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2842         f2fs_set_inode_flags(inode);
2843         inode_unlock(inode);
2844         f2fs_mark_inode_dirty_sync(inode, false);
2845 out_put:
2846         iput(inode);
2847         return err;
2848 }
2849
2850 static int f2fs_quota_off(struct super_block *sb, int type)
2851 {
2852         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2853         int err;
2854
2855         err = __f2fs_quota_off(sb, type);
2856
2857         /*
2858          * quotactl can shutdown journalled quota, result in inconsistence
2859          * between quota record and fs data by following updates, tag the
2860          * flag to let fsck be aware of it.
2861          */
2862         if (is_journalled_quota(sbi))
2863                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2864         return err;
2865 }
2866
2867 void f2fs_quota_off_umount(struct super_block *sb)
2868 {
2869         int type;
2870         int err;
2871
2872         for (type = 0; type < MAXQUOTAS; type++) {
2873                 err = __f2fs_quota_off(sb, type);
2874                 if (err) {
2875                         int ret = dquot_quota_off(sb, type);
2876
2877                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2878                                  type, err, ret);
2879                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2880                 }
2881         }
2882         /*
2883          * In case of checkpoint=disable, we must flush quota blocks.
2884          * This can cause NULL exception for node_inode in end_io, since
2885          * put_super already dropped it.
2886          */
2887         sync_filesystem(sb);
2888 }
2889
2890 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2891 {
2892         struct quota_info *dqopt = sb_dqopt(sb);
2893         int type;
2894
2895         for (type = 0; type < MAXQUOTAS; type++) {
2896                 if (!dqopt->files[type])
2897                         continue;
2898                 f2fs_inode_synced(dqopt->files[type]);
2899         }
2900 }
2901
2902 static int f2fs_dquot_commit(struct dquot *dquot)
2903 {
2904         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2905         int ret;
2906
2907         f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2908         ret = dquot_commit(dquot);
2909         if (ret < 0)
2910                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2911         f2fs_up_read(&sbi->quota_sem);
2912         return ret;
2913 }
2914
2915 static int f2fs_dquot_acquire(struct dquot *dquot)
2916 {
2917         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2918         int ret;
2919
2920         f2fs_down_read(&sbi->quota_sem);
2921         ret = dquot_acquire(dquot);
2922         if (ret < 0)
2923                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2924         f2fs_up_read(&sbi->quota_sem);
2925         return ret;
2926 }
2927
2928 static int f2fs_dquot_release(struct dquot *dquot)
2929 {
2930         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2931         int ret = dquot_release(dquot);
2932
2933         if (ret < 0)
2934                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2935         return ret;
2936 }
2937
2938 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2939 {
2940         struct super_block *sb = dquot->dq_sb;
2941         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2942         int ret = dquot_mark_dquot_dirty(dquot);
2943
2944         /* if we are using journalled quota */
2945         if (is_journalled_quota(sbi))
2946                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2947
2948         return ret;
2949 }
2950
2951 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2952 {
2953         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2954         int ret = dquot_commit_info(sb, type);
2955
2956         if (ret < 0)
2957                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2958         return ret;
2959 }
2960
2961 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2962 {
2963         *projid = F2FS_I(inode)->i_projid;
2964         return 0;
2965 }
2966
2967 static const struct dquot_operations f2fs_quota_operations = {
2968         .get_reserved_space = f2fs_get_reserved_space,
2969         .write_dquot    = f2fs_dquot_commit,
2970         .acquire_dquot  = f2fs_dquot_acquire,
2971         .release_dquot  = f2fs_dquot_release,
2972         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2973         .write_info     = f2fs_dquot_commit_info,
2974         .alloc_dquot    = dquot_alloc,
2975         .destroy_dquot  = dquot_destroy,
2976         .get_projid     = f2fs_get_projid,
2977         .get_next_id    = dquot_get_next_id,
2978 };
2979
2980 static const struct quotactl_ops f2fs_quotactl_ops = {
2981         .quota_on       = f2fs_quota_on,
2982         .quota_off      = f2fs_quota_off,
2983         .quota_sync     = f2fs_quota_sync,
2984         .get_state      = dquot_get_state,
2985         .set_info       = dquot_set_dqinfo,
2986         .get_dqblk      = dquot_get_dqblk,
2987         .set_dqblk      = dquot_set_dqblk,
2988         .get_nextdqblk  = dquot_get_next_dqblk,
2989 };
2990 #else
2991 int f2fs_dquot_initialize(struct inode *inode)
2992 {
2993         return 0;
2994 }
2995
2996 int f2fs_quota_sync(struct super_block *sb, int type)
2997 {
2998         return 0;
2999 }
3000
3001 void f2fs_quota_off_umount(struct super_block *sb)
3002 {
3003 }
3004 #endif
3005
3006 static const struct super_operations f2fs_sops = {
3007         .alloc_inode    = f2fs_alloc_inode,
3008         .free_inode     = f2fs_free_inode,
3009         .drop_inode     = f2fs_drop_inode,
3010         .write_inode    = f2fs_write_inode,
3011         .dirty_inode    = f2fs_dirty_inode,
3012         .show_options   = f2fs_show_options,
3013 #ifdef CONFIG_QUOTA
3014         .quota_read     = f2fs_quota_read,
3015         .quota_write    = f2fs_quota_write,
3016         .get_dquots     = f2fs_get_dquots,
3017 #endif
3018         .evict_inode    = f2fs_evict_inode,
3019         .put_super      = f2fs_put_super,
3020         .sync_fs        = f2fs_sync_fs,
3021         .freeze_fs      = f2fs_freeze,
3022         .unfreeze_fs    = f2fs_unfreeze,
3023         .statfs         = f2fs_statfs,
3024         .remount_fs     = f2fs_remount,
3025 };
3026
3027 #ifdef CONFIG_FS_ENCRYPTION
3028 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3029 {
3030         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3031                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3032                                 ctx, len, NULL);
3033 }
3034
3035 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3036                                                         void *fs_data)
3037 {
3038         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3039
3040         /*
3041          * Encrypting the root directory is not allowed because fsck
3042          * expects lost+found directory to exist and remain unencrypted
3043          * if LOST_FOUND feature is enabled.
3044          *
3045          */
3046         if (f2fs_sb_has_lost_found(sbi) &&
3047                         inode->i_ino == F2FS_ROOT_INO(sbi))
3048                 return -EPERM;
3049
3050         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3051                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3052                                 ctx, len, fs_data, XATTR_CREATE);
3053 }
3054
3055 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3056 {
3057         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3058 }
3059
3060 static bool f2fs_has_stable_inodes(struct super_block *sb)
3061 {
3062         return true;
3063 }
3064
3065 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3066                                        int *ino_bits_ret, int *lblk_bits_ret)
3067 {
3068         *ino_bits_ret = 8 * sizeof(nid_t);
3069         *lblk_bits_ret = 8 * sizeof(block_t);
3070 }
3071
3072 static struct block_device **f2fs_get_devices(struct super_block *sb,
3073                                               unsigned int *num_devs)
3074 {
3075         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3076         struct block_device **devs;
3077         int i;
3078
3079         if (!f2fs_is_multi_device(sbi))
3080                 return NULL;
3081
3082         devs = kmalloc_array(sbi->s_ndevs, sizeof(*devs), GFP_KERNEL);
3083         if (!devs)
3084                 return ERR_PTR(-ENOMEM);
3085
3086         for (i = 0; i < sbi->s_ndevs; i++)
3087                 devs[i] = FDEV(i).bdev;
3088         *num_devs = sbi->s_ndevs;
3089         return devs;
3090 }
3091
3092 static const struct fscrypt_operations f2fs_cryptops = {
3093         .key_prefix             = "f2fs:",
3094         .get_context            = f2fs_get_context,
3095         .set_context            = f2fs_set_context,
3096         .get_dummy_policy       = f2fs_get_dummy_policy,
3097         .empty_dir              = f2fs_empty_dir,
3098         .has_stable_inodes      = f2fs_has_stable_inodes,
3099         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
3100         .get_devices            = f2fs_get_devices,
3101 };
3102 #endif
3103
3104 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3105                 u64 ino, u32 generation)
3106 {
3107         struct f2fs_sb_info *sbi = F2FS_SB(sb);
3108         struct inode *inode;
3109
3110         if (f2fs_check_nid_range(sbi, ino))
3111                 return ERR_PTR(-ESTALE);
3112
3113         /*
3114          * f2fs_iget isn't quite right if the inode is currently unallocated!
3115          * However f2fs_iget currently does appropriate checks to handle stale
3116          * inodes so everything is OK.
3117          */
3118         inode = f2fs_iget(sb, ino);
3119         if (IS_ERR(inode))
3120                 return ERR_CAST(inode);
3121         if (unlikely(generation && inode->i_generation != generation)) {
3122                 /* we didn't find the right inode.. */
3123                 iput(inode);
3124                 return ERR_PTR(-ESTALE);
3125         }
3126         return inode;
3127 }
3128
3129 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3130                 int fh_len, int fh_type)
3131 {
3132         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3133                                     f2fs_nfs_get_inode);
3134 }
3135
3136 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3137                 int fh_len, int fh_type)
3138 {
3139         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3140                                     f2fs_nfs_get_inode);
3141 }
3142
3143 static const struct export_operations f2fs_export_ops = {
3144         .fh_to_dentry = f2fs_fh_to_dentry,
3145         .fh_to_parent = f2fs_fh_to_parent,
3146         .get_parent = f2fs_get_parent,
3147 };
3148
3149 loff_t max_file_blocks(struct inode *inode)
3150 {
3151         loff_t result = 0;
3152         loff_t leaf_count;
3153
3154         /*
3155          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3156          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3157          * space in inode.i_addr, it will be more safe to reassign
3158          * result as zero.
3159          */
3160
3161         if (inode && f2fs_compressed_file(inode))
3162                 leaf_count = ADDRS_PER_BLOCK(inode);
3163         else
3164                 leaf_count = DEF_ADDRS_PER_BLOCK;
3165
3166         /* two direct node blocks */
3167         result += (leaf_count * 2);
3168
3169         /* two indirect node blocks */
3170         leaf_count *= NIDS_PER_BLOCK;
3171         result += (leaf_count * 2);
3172
3173         /* one double indirect node block */
3174         leaf_count *= NIDS_PER_BLOCK;
3175         result += leaf_count;
3176
3177         return result;
3178 }
3179
3180 static int __f2fs_commit_super(struct buffer_head *bh,
3181                         struct f2fs_super_block *super)
3182 {
3183         lock_buffer(bh);
3184         if (super)
3185                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3186         set_buffer_dirty(bh);
3187         unlock_buffer(bh);
3188
3189         /* it's rare case, we can do fua all the time */
3190         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3191 }
3192
3193 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3194                                         struct buffer_head *bh)
3195 {
3196         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3197                                         (bh->b_data + F2FS_SUPER_OFFSET);
3198         struct super_block *sb = sbi->sb;
3199         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3200         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3201         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3202         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3203         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3204         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3205         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3206         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3207         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3208         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3209         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3210         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3211         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3212         u64 main_end_blkaddr = main_blkaddr +
3213                                 (segment_count_main << log_blocks_per_seg);
3214         u64 seg_end_blkaddr = segment0_blkaddr +
3215                                 (segment_count << log_blocks_per_seg);
3216
3217         if (segment0_blkaddr != cp_blkaddr) {
3218                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3219                           segment0_blkaddr, cp_blkaddr);
3220                 return true;
3221         }
3222
3223         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3224                                                         sit_blkaddr) {
3225                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3226                           cp_blkaddr, sit_blkaddr,
3227                           segment_count_ckpt << log_blocks_per_seg);
3228                 return true;
3229         }
3230
3231         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3232                                                         nat_blkaddr) {
3233                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3234                           sit_blkaddr, nat_blkaddr,
3235                           segment_count_sit << log_blocks_per_seg);
3236                 return true;
3237         }
3238
3239         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3240                                                         ssa_blkaddr) {
3241                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3242                           nat_blkaddr, ssa_blkaddr,
3243                           segment_count_nat << log_blocks_per_seg);
3244                 return true;
3245         }
3246
3247         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3248                                                         main_blkaddr) {
3249                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3250                           ssa_blkaddr, main_blkaddr,
3251                           segment_count_ssa << log_blocks_per_seg);
3252                 return true;
3253         }
3254
3255         if (main_end_blkaddr > seg_end_blkaddr) {
3256                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3257                           main_blkaddr, seg_end_blkaddr,
3258                           segment_count_main << log_blocks_per_seg);
3259                 return true;
3260         } else if (main_end_blkaddr < seg_end_blkaddr) {
3261                 int err = 0;
3262                 char *res;
3263
3264                 /* fix in-memory information all the time */
3265                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3266                                 segment0_blkaddr) >> log_blocks_per_seg);
3267
3268                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3269                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3270                         res = "internally";
3271                 } else {
3272                         err = __f2fs_commit_super(bh, NULL);
3273                         res = err ? "failed" : "done";
3274                 }
3275                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3276                           res, main_blkaddr, seg_end_blkaddr,
3277                           segment_count_main << log_blocks_per_seg);
3278                 if (err)
3279                         return true;
3280         }
3281         return false;
3282 }
3283
3284 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3285                                 struct buffer_head *bh)
3286 {
3287         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3288         block_t total_sections, blocks_per_seg;
3289         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3290                                         (bh->b_data + F2FS_SUPER_OFFSET);
3291         size_t crc_offset = 0;
3292         __u32 crc = 0;
3293
3294         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3295                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3296                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3297                 return -EINVAL;
3298         }
3299
3300         /* Check checksum_offset and crc in superblock */
3301         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3302                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3303                 if (crc_offset !=
3304                         offsetof(struct f2fs_super_block, crc)) {
3305                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3306                                   crc_offset);
3307                         return -EFSCORRUPTED;
3308                 }
3309                 crc = le32_to_cpu(raw_super->crc);
3310                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3311                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3312                         return -EFSCORRUPTED;
3313                 }
3314         }
3315
3316         /* Currently, support only 4KB block size */
3317         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3318                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3319                           le32_to_cpu(raw_super->log_blocksize),
3320                           F2FS_BLKSIZE_BITS);
3321                 return -EFSCORRUPTED;
3322         }
3323
3324         /* check log blocks per segment */
3325         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3326                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3327                           le32_to_cpu(raw_super->log_blocks_per_seg));
3328                 return -EFSCORRUPTED;
3329         }
3330
3331         /* Currently, support 512/1024/2048/4096 bytes sector size */
3332         if (le32_to_cpu(raw_super->log_sectorsize) >
3333                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3334                 le32_to_cpu(raw_super->log_sectorsize) <
3335                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3336                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3337                           le32_to_cpu(raw_super->log_sectorsize));
3338                 return -EFSCORRUPTED;
3339         }
3340         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3341                 le32_to_cpu(raw_super->log_sectorsize) !=
3342                         F2FS_MAX_LOG_SECTOR_SIZE) {
3343                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3344                           le32_to_cpu(raw_super->log_sectors_per_block),
3345                           le32_to_cpu(raw_super->log_sectorsize));
3346                 return -EFSCORRUPTED;
3347         }
3348
3349         segment_count = le32_to_cpu(raw_super->segment_count);
3350         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3351         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3352         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3353         total_sections = le32_to_cpu(raw_super->section_count);
3354
3355         /* blocks_per_seg should be 512, given the above check */
3356         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3357
3358         if (segment_count > F2FS_MAX_SEGMENT ||
3359                                 segment_count < F2FS_MIN_SEGMENTS) {
3360                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3361                 return -EFSCORRUPTED;
3362         }
3363
3364         if (total_sections > segment_count_main || total_sections < 1 ||
3365                         segs_per_sec > segment_count || !segs_per_sec) {
3366                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3367                           segment_count, total_sections, segs_per_sec);
3368                 return -EFSCORRUPTED;
3369         }
3370
3371         if (segment_count_main != total_sections * segs_per_sec) {
3372                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3373                           segment_count_main, total_sections, segs_per_sec);
3374                 return -EFSCORRUPTED;
3375         }
3376
3377         if ((segment_count / segs_per_sec) < total_sections) {
3378                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3379                           segment_count, segs_per_sec, total_sections);
3380                 return -EFSCORRUPTED;
3381         }
3382
3383         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3384                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3385                           segment_count, le64_to_cpu(raw_super->block_count));
3386                 return -EFSCORRUPTED;
3387         }
3388
3389         if (RDEV(0).path[0]) {
3390                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3391                 int i = 1;
3392
3393                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3394                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3395                         i++;
3396                 }
3397                 if (segment_count != dev_seg_count) {
3398                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3399                                         segment_count, dev_seg_count);
3400                         return -EFSCORRUPTED;
3401                 }
3402         } else {
3403                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3404                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3405                         f2fs_info(sbi, "Zoned block device path is missing");
3406                         return -EFSCORRUPTED;
3407                 }
3408         }
3409
3410         if (secs_per_zone > total_sections || !secs_per_zone) {
3411                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3412                           secs_per_zone, total_sections);
3413                 return -EFSCORRUPTED;
3414         }
3415         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3416                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3417                         (le32_to_cpu(raw_super->extension_count) +
3418                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3419                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3420                           le32_to_cpu(raw_super->extension_count),
3421                           raw_super->hot_ext_count,
3422                           F2FS_MAX_EXTENSION);
3423                 return -EFSCORRUPTED;
3424         }
3425
3426         if (le32_to_cpu(raw_super->cp_payload) >=
3427                                 (blocks_per_seg - F2FS_CP_PACKS -
3428                                 NR_CURSEG_PERSIST_TYPE)) {
3429                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3430                           le32_to_cpu(raw_super->cp_payload),
3431                           blocks_per_seg - F2FS_CP_PACKS -
3432                           NR_CURSEG_PERSIST_TYPE);
3433                 return -EFSCORRUPTED;
3434         }
3435
3436         /* check reserved ino info */
3437         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3438                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3439                 le32_to_cpu(raw_super->root_ino) != 3) {
3440                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3441                           le32_to_cpu(raw_super->node_ino),
3442                           le32_to_cpu(raw_super->meta_ino),
3443                           le32_to_cpu(raw_super->root_ino));
3444                 return -EFSCORRUPTED;
3445         }
3446
3447         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3448         if (sanity_check_area_boundary(sbi, bh))
3449                 return -EFSCORRUPTED;
3450
3451         return 0;
3452 }
3453
3454 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3455 {
3456         unsigned int total, fsmeta;
3457         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3458         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3459         unsigned int ovp_segments, reserved_segments;
3460         unsigned int main_segs, blocks_per_seg;
3461         unsigned int sit_segs, nat_segs;
3462         unsigned int sit_bitmap_size, nat_bitmap_size;
3463         unsigned int log_blocks_per_seg;
3464         unsigned int segment_count_main;
3465         unsigned int cp_pack_start_sum, cp_payload;
3466         block_t user_block_count, valid_user_blocks;
3467         block_t avail_node_count, valid_node_count;
3468         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3469         int i, j;
3470
3471         total = le32_to_cpu(raw_super->segment_count);
3472         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3473         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3474         fsmeta += sit_segs;
3475         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3476         fsmeta += nat_segs;
3477         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3478         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3479
3480         if (unlikely(fsmeta >= total))
3481                 return 1;
3482
3483         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3484         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3485
3486         if (!f2fs_sb_has_readonly(sbi) &&
3487                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3488                         ovp_segments == 0 || reserved_segments == 0)) {
3489                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3490                 return 1;
3491         }
3492         user_block_count = le64_to_cpu(ckpt->user_block_count);
3493         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3494                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3495         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3496         if (!user_block_count || user_block_count >=
3497                         segment_count_main << log_blocks_per_seg) {
3498                 f2fs_err(sbi, "Wrong user_block_count: %u",
3499                          user_block_count);
3500                 return 1;
3501         }
3502
3503         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3504         if (valid_user_blocks > user_block_count) {
3505                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3506                          valid_user_blocks, user_block_count);
3507                 return 1;
3508         }
3509
3510         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3511         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3512         if (valid_node_count > avail_node_count) {
3513                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3514                          valid_node_count, avail_node_count);
3515                 return 1;
3516         }
3517
3518         main_segs = le32_to_cpu(raw_super->segment_count_main);
3519         blocks_per_seg = sbi->blocks_per_seg;
3520
3521         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3522                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3523                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3524                         return 1;
3525
3526                 if (f2fs_sb_has_readonly(sbi))
3527                         goto check_data;
3528
3529                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3530                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3531                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3532                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3533                                          i, j,
3534                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3535                                 return 1;
3536                         }
3537                 }
3538         }
3539 check_data:
3540         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3541                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3542                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3543                         return 1;
3544
3545                 if (f2fs_sb_has_readonly(sbi))
3546                         goto skip_cross;
3547
3548                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3549                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3550                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3551                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3552                                          i, j,
3553                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3554                                 return 1;
3555                         }
3556                 }
3557         }
3558         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3559                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3560                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3561                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3562                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3563                                          i, j,
3564                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3565                                 return 1;
3566                         }
3567                 }
3568         }
3569 skip_cross:
3570         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3571         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3572
3573         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3574                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3575                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3576                          sit_bitmap_size, nat_bitmap_size);
3577                 return 1;
3578         }
3579
3580         cp_pack_start_sum = __start_sum_addr(sbi);
3581         cp_payload = __cp_payload(sbi);
3582         if (cp_pack_start_sum < cp_payload + 1 ||
3583                 cp_pack_start_sum > blocks_per_seg - 1 -
3584                         NR_CURSEG_PERSIST_TYPE) {
3585                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3586                          cp_pack_start_sum);
3587                 return 1;
3588         }
3589
3590         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3591                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3592                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3593                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3594                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3595                           le32_to_cpu(ckpt->checksum_offset));
3596                 return 1;
3597         }
3598
3599         nat_blocks = nat_segs << log_blocks_per_seg;
3600         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3601         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3602         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3603                 (cp_payload + F2FS_CP_PACKS +
3604                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3605                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3606                           cp_payload, nat_bits_blocks);
3607                 return 1;
3608         }
3609
3610         if (unlikely(f2fs_cp_error(sbi))) {
3611                 f2fs_err(sbi, "A bug case: need to run fsck");
3612                 return 1;
3613         }
3614         return 0;
3615 }
3616
3617 static void init_sb_info(struct f2fs_sb_info *sbi)
3618 {
3619         struct f2fs_super_block *raw_super = sbi->raw_super;
3620         int i;
3621
3622         sbi->log_sectors_per_block =
3623                 le32_to_cpu(raw_super->log_sectors_per_block);
3624         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3625         sbi->blocksize = 1 << sbi->log_blocksize;
3626         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3627         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3628         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3629         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3630         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3631         sbi->total_node_count =
3632                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3633                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3634         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3635         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3636         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3637         sbi->cur_victim_sec = NULL_SECNO;
3638         sbi->gc_mode = GC_NORMAL;
3639         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3640         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3641         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3642         sbi->migration_granularity = sbi->segs_per_sec;
3643         sbi->seq_file_ra_mul = MIN_RA_MUL;
3644         sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3645         sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3646         spin_lock_init(&sbi->gc_remaining_trials_lock);
3647         atomic64_set(&sbi->current_atomic_write, 0);
3648
3649         sbi->dir_level = DEF_DIR_LEVEL;
3650         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3651         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3652         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3653         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3654         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3655         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3656                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3657         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3658
3659         for (i = 0; i < NR_COUNT_TYPE; i++)
3660                 atomic_set(&sbi->nr_pages[i], 0);
3661
3662         for (i = 0; i < META; i++)
3663                 atomic_set(&sbi->wb_sync_req[i], 0);
3664
3665         INIT_LIST_HEAD(&sbi->s_list);
3666         mutex_init(&sbi->umount_mutex);
3667         init_f2fs_rwsem(&sbi->io_order_lock);
3668         spin_lock_init(&sbi->cp_lock);
3669
3670         sbi->dirty_device = 0;
3671         spin_lock_init(&sbi->dev_lock);
3672
3673         init_f2fs_rwsem(&sbi->sb_lock);
3674         init_f2fs_rwsem(&sbi->pin_sem);
3675 }
3676
3677 static int init_percpu_info(struct f2fs_sb_info *sbi)
3678 {
3679         int err;
3680
3681         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3682         if (err)
3683                 return err;
3684
3685         err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3686         if (err)
3687                 goto err_valid_block;
3688
3689         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3690                                                                 GFP_KERNEL);
3691         if (err)
3692                 goto err_node_block;
3693         return 0;
3694
3695 err_node_block:
3696         percpu_counter_destroy(&sbi->rf_node_block_count);
3697 err_valid_block:
3698         percpu_counter_destroy(&sbi->alloc_valid_block_count);
3699         return err;
3700 }
3701
3702 #ifdef CONFIG_BLK_DEV_ZONED
3703
3704 struct f2fs_report_zones_args {
3705         struct f2fs_sb_info *sbi;
3706         struct f2fs_dev_info *dev;
3707 };
3708
3709 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3710                               void *data)
3711 {
3712         struct f2fs_report_zones_args *rz_args = data;
3713         block_t unusable_blocks = (zone->len - zone->capacity) >>
3714                                         F2FS_LOG_SECTORS_PER_BLOCK;
3715
3716         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3717                 return 0;
3718
3719         set_bit(idx, rz_args->dev->blkz_seq);
3720         if (!rz_args->sbi->unusable_blocks_per_sec) {
3721                 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3722                 return 0;
3723         }
3724         if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3725                 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3726                 return -EINVAL;
3727         }
3728         return 0;
3729 }
3730
3731 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3732 {
3733         struct block_device *bdev = FDEV(devi).bdev;
3734         sector_t nr_sectors = bdev_nr_sectors(bdev);
3735         struct f2fs_report_zones_args rep_zone_arg;
3736         u64 zone_sectors;
3737         int ret;
3738
3739         if (!f2fs_sb_has_blkzoned(sbi))
3740                 return 0;
3741
3742         zone_sectors = bdev_zone_sectors(bdev);
3743         if (!is_power_of_2(zone_sectors)) {
3744                 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3745                 return -EINVAL;
3746         }
3747
3748         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3749                                 SECTOR_TO_BLOCK(zone_sectors))
3750                 return -EINVAL;
3751         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3752         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3753                                 __ilog2_u32(sbi->blocks_per_blkz))
3754                 return -EINVAL;
3755         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3756         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3757                                         sbi->log_blocks_per_blkz;
3758         if (nr_sectors & (zone_sectors - 1))
3759                 FDEV(devi).nr_blkz++;
3760
3761         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3762                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3763                                         * sizeof(unsigned long),
3764                                         GFP_KERNEL);
3765         if (!FDEV(devi).blkz_seq)
3766                 return -ENOMEM;
3767
3768         rep_zone_arg.sbi = sbi;
3769         rep_zone_arg.dev = &FDEV(devi);
3770
3771         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3772                                   &rep_zone_arg);
3773         if (ret < 0)
3774                 return ret;
3775         return 0;
3776 }
3777 #endif
3778
3779 /*
3780  * Read f2fs raw super block.
3781  * Because we have two copies of super block, so read both of them
3782  * to get the first valid one. If any one of them is broken, we pass
3783  * them recovery flag back to the caller.
3784  */
3785 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3786                         struct f2fs_super_block **raw_super,
3787                         int *valid_super_block, int *recovery)
3788 {
3789         struct super_block *sb = sbi->sb;
3790         int block;
3791         struct buffer_head *bh;
3792         struct f2fs_super_block *super;
3793         int err = 0;
3794
3795         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3796         if (!super)
3797                 return -ENOMEM;
3798
3799         for (block = 0; block < 2; block++) {
3800                 bh = sb_bread(sb, block);
3801                 if (!bh) {
3802                         f2fs_err(sbi, "Unable to read %dth superblock",
3803                                  block + 1);
3804                         err = -EIO;
3805                         *recovery = 1;
3806                         continue;
3807                 }
3808
3809                 /* sanity checking of raw super */
3810                 err = sanity_check_raw_super(sbi, bh);
3811                 if (err) {
3812                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3813                                  block + 1);
3814                         brelse(bh);
3815                         *recovery = 1;
3816                         continue;
3817                 }
3818
3819                 if (!*raw_super) {
3820                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3821                                                         sizeof(*super));
3822                         *valid_super_block = block;
3823                         *raw_super = super;
3824                 }
3825                 brelse(bh);
3826         }
3827
3828         /* No valid superblock */
3829         if (!*raw_super)
3830                 kfree(super);
3831         else
3832                 err = 0;
3833
3834         return err;
3835 }
3836
3837 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3838 {
3839         struct buffer_head *bh;
3840         __u32 crc = 0;
3841         int err;
3842
3843         if ((recover && f2fs_readonly(sbi->sb)) ||
3844                                 bdev_read_only(sbi->sb->s_bdev)) {
3845                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3846                 return -EROFS;
3847         }
3848
3849         /* we should update superblock crc here */
3850         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3851                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3852                                 offsetof(struct f2fs_super_block, crc));
3853                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3854         }
3855
3856         /* write back-up superblock first */
3857         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3858         if (!bh)
3859                 return -EIO;
3860         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3861         brelse(bh);
3862
3863         /* if we are in recovery path, skip writing valid superblock */
3864         if (recover || err)
3865                 return err;
3866
3867         /* write current valid superblock */
3868         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3869         if (!bh)
3870                 return -EIO;
3871         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3872         brelse(bh);
3873         return err;
3874 }
3875
3876 void f2fs_handle_stop(struct f2fs_sb_info *sbi, unsigned char reason)
3877 {
3878         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3879         int err;
3880
3881         f2fs_down_write(&sbi->sb_lock);
3882
3883         if (raw_super->s_stop_reason[reason] < ((1 << BITS_PER_BYTE) - 1))
3884                 raw_super->s_stop_reason[reason]++;
3885
3886         err = f2fs_commit_super(sbi, false);
3887         if (err)
3888                 f2fs_err(sbi, "f2fs_commit_super fails to record reason:%u err:%d",
3889                                                                 reason, err);
3890         f2fs_up_write(&sbi->sb_lock);
3891 }
3892
3893 static void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
3894 {
3895         spin_lock(&sbi->error_lock);
3896         if (!test_bit(flag, (unsigned long *)sbi->errors)) {
3897                 set_bit(flag, (unsigned long *)sbi->errors);
3898                 sbi->error_dirty = true;
3899         }
3900         spin_unlock(&sbi->error_lock);
3901 }
3902
3903 static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
3904 {
3905         bool need_update = false;
3906
3907         spin_lock(&sbi->error_lock);
3908         if (sbi->error_dirty) {
3909                 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
3910                                                         MAX_F2FS_ERRORS);
3911                 sbi->error_dirty = false;
3912                 need_update = true;
3913         }
3914         spin_unlock(&sbi->error_lock);
3915
3916         return need_update;
3917 }
3918
3919 void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
3920 {
3921         int err;
3922
3923         f2fs_save_errors(sbi, error);
3924
3925         f2fs_down_write(&sbi->sb_lock);
3926
3927         if (!f2fs_update_errors(sbi))
3928                 goto out_unlock;
3929
3930         err = f2fs_commit_super(sbi, false);
3931         if (err)
3932                 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d",
3933                                                                 error, err);
3934 out_unlock:
3935         f2fs_up_write(&sbi->sb_lock);
3936 }
3937
3938 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3939 {
3940         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3941         unsigned int max_devices = MAX_DEVICES;
3942         unsigned int logical_blksize;
3943         int i;
3944
3945         /* Initialize single device information */
3946         if (!RDEV(0).path[0]) {
3947                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3948                         return 0;
3949                 max_devices = 1;
3950         }
3951
3952         /*
3953          * Initialize multiple devices information, or single
3954          * zoned block device information.
3955          */
3956         sbi->devs = f2fs_kzalloc(sbi,
3957                                  array_size(max_devices,
3958                                             sizeof(struct f2fs_dev_info)),
3959                                  GFP_KERNEL);
3960         if (!sbi->devs)
3961                 return -ENOMEM;
3962
3963         logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3964         sbi->aligned_blksize = true;
3965
3966         for (i = 0; i < max_devices; i++) {
3967
3968                 if (i > 0 && !RDEV(i).path[0])
3969                         break;
3970
3971                 if (max_devices == 1) {
3972                         /* Single zoned block device mount */
3973                         FDEV(0).bdev =
3974                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3975                                         sbi->sb->s_mode, sbi->sb->s_type);
3976                 } else {
3977                         /* Multi-device mount */
3978                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3979                         FDEV(i).total_segments =
3980                                 le32_to_cpu(RDEV(i).total_segments);
3981                         if (i == 0) {
3982                                 FDEV(i).start_blk = 0;
3983                                 FDEV(i).end_blk = FDEV(i).start_blk +
3984                                     (FDEV(i).total_segments <<
3985                                     sbi->log_blocks_per_seg) - 1 +
3986                                     le32_to_cpu(raw_super->segment0_blkaddr);
3987                         } else {
3988                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3989                                 FDEV(i).end_blk = FDEV(i).start_blk +
3990                                         (FDEV(i).total_segments <<
3991                                         sbi->log_blocks_per_seg) - 1;
3992                         }
3993                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3994                                         sbi->sb->s_mode, sbi->sb->s_type);
3995                 }
3996                 if (IS_ERR(FDEV(i).bdev))
3997                         return PTR_ERR(FDEV(i).bdev);
3998
3999                 /* to release errored devices */
4000                 sbi->s_ndevs = i + 1;
4001
4002                 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4003                         sbi->aligned_blksize = false;
4004
4005 #ifdef CONFIG_BLK_DEV_ZONED
4006                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
4007                                 !f2fs_sb_has_blkzoned(sbi)) {
4008                         f2fs_err(sbi, "Zoned block device feature not enabled");
4009                         return -EINVAL;
4010                 }
4011                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
4012                         if (init_blkz_info(sbi, i)) {
4013                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
4014                                 return -EINVAL;
4015                         }
4016                         if (max_devices == 1)
4017                                 break;
4018                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
4019                                   i, FDEV(i).path,
4020                                   FDEV(i).total_segments,
4021                                   FDEV(i).start_blk, FDEV(i).end_blk,
4022                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
4023                                   "Host-aware" : "Host-managed");
4024                         continue;
4025                 }
4026 #endif
4027                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4028                           i, FDEV(i).path,
4029                           FDEV(i).total_segments,
4030                           FDEV(i).start_blk, FDEV(i).end_blk);
4031         }
4032         f2fs_info(sbi,
4033                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
4034         return 0;
4035 }
4036
4037 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4038 {
4039 #if IS_ENABLED(CONFIG_UNICODE)
4040         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4041                 const struct f2fs_sb_encodings *encoding_info;
4042                 struct unicode_map *encoding;
4043                 __u16 encoding_flags;
4044
4045                 encoding_info = f2fs_sb_read_encoding(sbi->raw_super);
4046                 if (!encoding_info) {
4047                         f2fs_err(sbi,
4048                                  "Encoding requested by superblock is unknown");
4049                         return -EINVAL;
4050                 }
4051
4052                 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4053                 encoding = utf8_load(encoding_info->version);
4054                 if (IS_ERR(encoding)) {
4055                         f2fs_err(sbi,
4056                                  "can't mount with superblock charset: %s-%u.%u.%u "
4057                                  "not supported by the kernel. flags: 0x%x.",
4058                                  encoding_info->name,
4059                                  unicode_major(encoding_info->version),
4060                                  unicode_minor(encoding_info->version),
4061                                  unicode_rev(encoding_info->version),
4062                                  encoding_flags);
4063                         return PTR_ERR(encoding);
4064                 }
4065                 f2fs_info(sbi, "Using encoding defined by superblock: "
4066                          "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4067                          unicode_major(encoding_info->version),
4068                          unicode_minor(encoding_info->version),
4069                          unicode_rev(encoding_info->version),
4070                          encoding_flags);
4071
4072                 sbi->sb->s_encoding = encoding;
4073                 sbi->sb->s_encoding_flags = encoding_flags;
4074         }
4075 #else
4076         if (f2fs_sb_has_casefold(sbi)) {
4077                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4078                 return -EINVAL;
4079         }
4080 #endif
4081         return 0;
4082 }
4083
4084 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4085 {
4086         /* adjust parameters according to the volume size */
4087         if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4088                 if (f2fs_block_unit_discard(sbi))
4089                         SM_I(sbi)->dcc_info->discard_granularity =
4090                                                 MIN_DISCARD_GRANULARITY;
4091                 SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4092                                         BIT(F2FS_IPU_HONOR_OPU_WRITE);
4093         }
4094
4095         sbi->readdir_ra = true;
4096 }
4097
4098 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4099 {
4100         struct f2fs_sb_info *sbi;
4101         struct f2fs_super_block *raw_super;
4102         struct inode *root;
4103         int err;
4104         bool skip_recovery = false, need_fsck = false;
4105         char *options = NULL;
4106         int recovery, i, valid_super_block;
4107         struct curseg_info *seg_i;
4108         int retry_cnt = 1;
4109
4110 try_onemore:
4111         err = -EINVAL;
4112         raw_super = NULL;
4113         valid_super_block = -1;
4114         recovery = 0;
4115
4116         /* allocate memory for f2fs-specific super block info */
4117         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4118         if (!sbi)
4119                 return -ENOMEM;
4120
4121         sbi->sb = sb;
4122
4123         /* initialize locks within allocated memory */
4124         init_f2fs_rwsem(&sbi->gc_lock);
4125         mutex_init(&sbi->writepages);
4126         init_f2fs_rwsem(&sbi->cp_global_sem);
4127         init_f2fs_rwsem(&sbi->node_write);
4128         init_f2fs_rwsem(&sbi->node_change);
4129         spin_lock_init(&sbi->stat_lock);
4130         init_f2fs_rwsem(&sbi->cp_rwsem);
4131         init_f2fs_rwsem(&sbi->quota_sem);
4132         init_waitqueue_head(&sbi->cp_wait);
4133         spin_lock_init(&sbi->error_lock);
4134
4135         for (i = 0; i < NR_INODE_TYPE; i++) {
4136                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4137                 spin_lock_init(&sbi->inode_lock[i]);
4138         }
4139         mutex_init(&sbi->flush_lock);
4140
4141         /* Load the checksum driver */
4142         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4143         if (IS_ERR(sbi->s_chksum_driver)) {
4144                 f2fs_err(sbi, "Cannot load crc32 driver.");
4145                 err = PTR_ERR(sbi->s_chksum_driver);
4146                 sbi->s_chksum_driver = NULL;
4147                 goto free_sbi;
4148         }
4149
4150         /* set a block size */
4151         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4152                 f2fs_err(sbi, "unable to set blocksize");
4153                 goto free_sbi;
4154         }
4155
4156         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4157                                                                 &recovery);
4158         if (err)
4159                 goto free_sbi;
4160
4161         sb->s_fs_info = sbi;
4162         sbi->raw_super = raw_super;
4163
4164         memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4165
4166         /* precompute checksum seed for metadata */
4167         if (f2fs_sb_has_inode_chksum(sbi))
4168                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4169                                                 sizeof(raw_super->uuid));
4170
4171         default_options(sbi);
4172         /* parse mount options */
4173         options = kstrdup((const char *)data, GFP_KERNEL);
4174         if (data && !options) {
4175                 err = -ENOMEM;
4176                 goto free_sb_buf;
4177         }
4178
4179         err = parse_options(sb, options, false);
4180         if (err)
4181                 goto free_options;
4182
4183         sb->s_maxbytes = max_file_blocks(NULL) <<
4184                                 le32_to_cpu(raw_super->log_blocksize);
4185         sb->s_max_links = F2FS_LINK_MAX;
4186
4187         err = f2fs_setup_casefold(sbi);
4188         if (err)
4189                 goto free_options;
4190
4191 #ifdef CONFIG_QUOTA
4192         sb->dq_op = &f2fs_quota_operations;
4193         sb->s_qcop = &f2fs_quotactl_ops;
4194         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4195
4196         if (f2fs_sb_has_quota_ino(sbi)) {
4197                 for (i = 0; i < MAXQUOTAS; i++) {
4198                         if (f2fs_qf_ino(sbi->sb, i))
4199                                 sbi->nquota_files++;
4200                 }
4201         }
4202 #endif
4203
4204         sb->s_op = &f2fs_sops;
4205 #ifdef CONFIG_FS_ENCRYPTION
4206         sb->s_cop = &f2fs_cryptops;
4207 #endif
4208 #ifdef CONFIG_FS_VERITY
4209         sb->s_vop = &f2fs_verityops;
4210 #endif
4211         sb->s_xattr = f2fs_xattr_handlers;
4212         sb->s_export_op = &f2fs_export_ops;
4213         sb->s_magic = F2FS_SUPER_MAGIC;
4214         sb->s_time_gran = 1;
4215         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4216                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4217         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4218         sb->s_iflags |= SB_I_CGROUPWB;
4219
4220         /* init f2fs-specific super block info */
4221         sbi->valid_super_block = valid_super_block;
4222
4223         /* disallow all the data/node/meta page writes */
4224         set_sbi_flag(sbi, SBI_POR_DOING);
4225
4226         err = f2fs_init_write_merge_io(sbi);
4227         if (err)
4228                 goto free_bio_info;
4229
4230         init_sb_info(sbi);
4231
4232         err = f2fs_init_iostat(sbi);
4233         if (err)
4234                 goto free_bio_info;
4235
4236         err = init_percpu_info(sbi);
4237         if (err)
4238                 goto free_iostat;
4239
4240         if (F2FS_IO_ALIGNED(sbi)) {
4241                 sbi->write_io_dummy =
4242                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4243                 if (!sbi->write_io_dummy) {
4244                         err = -ENOMEM;
4245                         goto free_percpu;
4246                 }
4247         }
4248
4249         /* init per sbi slab cache */
4250         err = f2fs_init_xattr_caches(sbi);
4251         if (err)
4252                 goto free_io_dummy;
4253         err = f2fs_init_page_array_cache(sbi);
4254         if (err)
4255                 goto free_xattr_cache;
4256
4257         /* get an inode for meta space */
4258         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4259         if (IS_ERR(sbi->meta_inode)) {
4260                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4261                 err = PTR_ERR(sbi->meta_inode);
4262                 goto free_page_array_cache;
4263         }
4264
4265         err = f2fs_get_valid_checkpoint(sbi);
4266         if (err) {
4267                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4268                 goto free_meta_inode;
4269         }
4270
4271         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4272                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4273         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4274                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4275                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4276         }
4277
4278         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4279                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4280
4281         /* Initialize device list */
4282         err = f2fs_scan_devices(sbi);
4283         if (err) {
4284                 f2fs_err(sbi, "Failed to find devices");
4285                 goto free_devices;
4286         }
4287
4288         err = f2fs_init_post_read_wq(sbi);
4289         if (err) {
4290                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4291                 goto free_devices;
4292         }
4293
4294         sbi->total_valid_node_count =
4295                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4296         percpu_counter_set(&sbi->total_valid_inode_count,
4297                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4298         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4299         sbi->total_valid_block_count =
4300                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4301         sbi->last_valid_block_count = sbi->total_valid_block_count;
4302         sbi->reserved_blocks = 0;
4303         sbi->current_reserved_blocks = 0;
4304         limit_reserve_root(sbi);
4305         adjust_unusable_cap_perc(sbi);
4306
4307         f2fs_init_extent_cache_info(sbi);
4308
4309         f2fs_init_ino_entry_info(sbi);
4310
4311         f2fs_init_fsync_node_info(sbi);
4312
4313         /* setup checkpoint request control and start checkpoint issue thread */
4314         f2fs_init_ckpt_req_control(sbi);
4315         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4316                         test_opt(sbi, MERGE_CHECKPOINT)) {
4317                 err = f2fs_start_ckpt_thread(sbi);
4318                 if (err) {
4319                         f2fs_err(sbi,
4320                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4321                             err);
4322                         goto stop_ckpt_thread;
4323                 }
4324         }
4325
4326         /* setup f2fs internal modules */
4327         err = f2fs_build_segment_manager(sbi);
4328         if (err) {
4329                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4330                          err);
4331                 goto free_sm;
4332         }
4333         err = f2fs_build_node_manager(sbi);
4334         if (err) {
4335                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4336                          err);
4337                 goto free_nm;
4338         }
4339
4340         err = adjust_reserved_segment(sbi);
4341         if (err)
4342                 goto free_nm;
4343
4344         /* For write statistics */
4345         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4346
4347         /* Read accumulated write IO statistics if exists */
4348         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4349         if (__exist_node_summaries(sbi))
4350                 sbi->kbytes_written =
4351                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4352
4353         f2fs_build_gc_manager(sbi);
4354
4355         err = f2fs_build_stats(sbi);
4356         if (err)
4357                 goto free_nm;
4358
4359         /* get an inode for node space */
4360         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4361         if (IS_ERR(sbi->node_inode)) {
4362                 f2fs_err(sbi, "Failed to read node inode");
4363                 err = PTR_ERR(sbi->node_inode);
4364                 goto free_stats;
4365         }
4366
4367         /* read root inode and dentry */
4368         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4369         if (IS_ERR(root)) {
4370                 f2fs_err(sbi, "Failed to read root inode");
4371                 err = PTR_ERR(root);
4372                 goto free_node_inode;
4373         }
4374         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4375                         !root->i_size || !root->i_nlink) {
4376                 iput(root);
4377                 err = -EINVAL;
4378                 goto free_node_inode;
4379         }
4380
4381         sb->s_root = d_make_root(root); /* allocate root dentry */
4382         if (!sb->s_root) {
4383                 err = -ENOMEM;
4384                 goto free_node_inode;
4385         }
4386
4387         err = f2fs_init_compress_inode(sbi);
4388         if (err)
4389                 goto free_root_inode;
4390
4391         err = f2fs_register_sysfs(sbi);
4392         if (err)
4393                 goto free_compress_inode;
4394
4395 #ifdef CONFIG_QUOTA
4396         /* Enable quota usage during mount */
4397         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4398                 err = f2fs_enable_quotas(sb);
4399                 if (err)
4400                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4401         }
4402 #endif
4403         /* if there are any orphan inodes, free them */
4404         err = f2fs_recover_orphan_inodes(sbi);
4405         if (err)
4406                 goto free_meta;
4407
4408         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4409                 goto reset_checkpoint;
4410
4411         /* recover fsynced data */
4412         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4413                         !test_opt(sbi, NORECOVERY)) {
4414                 /*
4415                  * mount should be failed, when device has readonly mode, and
4416                  * previous checkpoint was not done by clean system shutdown.
4417                  */
4418                 if (f2fs_hw_is_readonly(sbi)) {
4419                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4420                                 err = f2fs_recover_fsync_data(sbi, true);
4421                                 if (err > 0) {
4422                                         err = -EROFS;
4423                                         f2fs_err(sbi, "Need to recover fsync data, but "
4424                                                 "write access unavailable, please try "
4425                                                 "mount w/ disable_roll_forward or norecovery");
4426                                 }
4427                                 if (err < 0)
4428                                         goto free_meta;
4429                         }
4430                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4431                         goto reset_checkpoint;
4432                 }
4433
4434                 if (need_fsck)
4435                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4436
4437                 if (skip_recovery)
4438                         goto reset_checkpoint;
4439
4440                 err = f2fs_recover_fsync_data(sbi, false);
4441                 if (err < 0) {
4442                         if (err != -ENOMEM)
4443                                 skip_recovery = true;
4444                         need_fsck = true;
4445                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4446                                  err);
4447                         goto free_meta;
4448                 }
4449         } else {
4450                 err = f2fs_recover_fsync_data(sbi, true);
4451
4452                 if (!f2fs_readonly(sb) && err > 0) {
4453                         err = -EINVAL;
4454                         f2fs_err(sbi, "Need to recover fsync data");
4455                         goto free_meta;
4456                 }
4457         }
4458
4459         /*
4460          * If the f2fs is not readonly and fsync data recovery succeeds,
4461          * check zoned block devices' write pointer consistency.
4462          */
4463         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4464                 err = f2fs_check_write_pointer(sbi);
4465                 if (err)
4466                         goto free_meta;
4467         }
4468
4469 reset_checkpoint:
4470         f2fs_init_inmem_curseg(sbi);
4471
4472         /* f2fs_recover_fsync_data() cleared this already */
4473         clear_sbi_flag(sbi, SBI_POR_DOING);
4474
4475         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4476                 err = f2fs_disable_checkpoint(sbi);
4477                 if (err)
4478                         goto sync_free_meta;
4479         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4480                 f2fs_enable_checkpoint(sbi);
4481         }
4482
4483         /*
4484          * If filesystem is not mounted as read-only then
4485          * do start the gc_thread.
4486          */
4487         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4488                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4489                 /* After POR, we can run background GC thread.*/
4490                 err = f2fs_start_gc_thread(sbi);
4491                 if (err)
4492                         goto sync_free_meta;
4493         }
4494         kvfree(options);
4495
4496         /* recover broken superblock */
4497         if (recovery) {
4498                 err = f2fs_commit_super(sbi, true);
4499                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4500                           sbi->valid_super_block ? 1 : 2, err);
4501         }
4502
4503         f2fs_join_shrinker(sbi);
4504
4505         f2fs_tuning_parameters(sbi);
4506
4507         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4508                     cur_cp_version(F2FS_CKPT(sbi)));
4509         f2fs_update_time(sbi, CP_TIME);
4510         f2fs_update_time(sbi, REQ_TIME);
4511         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4512         return 0;
4513
4514 sync_free_meta:
4515         /* safe to flush all the data */
4516         sync_filesystem(sbi->sb);
4517         retry_cnt = 0;
4518
4519 free_meta:
4520 #ifdef CONFIG_QUOTA
4521         f2fs_truncate_quota_inode_pages(sb);
4522         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4523                 f2fs_quota_off_umount(sbi->sb);
4524 #endif
4525         /*
4526          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4527          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4528          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4529          * falls into an infinite loop in f2fs_sync_meta_pages().
4530          */
4531         truncate_inode_pages_final(META_MAPPING(sbi));
4532         /* evict some inodes being cached by GC */
4533         evict_inodes(sb);
4534         f2fs_unregister_sysfs(sbi);
4535 free_compress_inode:
4536         f2fs_destroy_compress_inode(sbi);
4537 free_root_inode:
4538         dput(sb->s_root);
4539         sb->s_root = NULL;
4540 free_node_inode:
4541         f2fs_release_ino_entry(sbi, true);
4542         truncate_inode_pages_final(NODE_MAPPING(sbi));
4543         iput(sbi->node_inode);
4544         sbi->node_inode = NULL;
4545 free_stats:
4546         f2fs_destroy_stats(sbi);
4547 free_nm:
4548         /* stop discard thread before destroying node manager */
4549         f2fs_stop_discard_thread(sbi);
4550         f2fs_destroy_node_manager(sbi);
4551 free_sm:
4552         f2fs_destroy_segment_manager(sbi);
4553 stop_ckpt_thread:
4554         f2fs_stop_ckpt_thread(sbi);
4555         f2fs_destroy_post_read_wq(sbi);
4556 free_devices:
4557         destroy_device_list(sbi);
4558         kvfree(sbi->ckpt);
4559 free_meta_inode:
4560         make_bad_inode(sbi->meta_inode);
4561         iput(sbi->meta_inode);
4562         sbi->meta_inode = NULL;
4563 free_page_array_cache:
4564         f2fs_destroy_page_array_cache(sbi);
4565 free_xattr_cache:
4566         f2fs_destroy_xattr_caches(sbi);
4567 free_io_dummy:
4568         mempool_destroy(sbi->write_io_dummy);
4569 free_percpu:
4570         destroy_percpu_info(sbi);
4571 free_iostat:
4572         f2fs_destroy_iostat(sbi);
4573 free_bio_info:
4574         for (i = 0; i < NR_PAGE_TYPE; i++)
4575                 kvfree(sbi->write_io[i]);
4576
4577 #if IS_ENABLED(CONFIG_UNICODE)
4578         utf8_unload(sb->s_encoding);
4579         sb->s_encoding = NULL;
4580 #endif
4581 free_options:
4582 #ifdef CONFIG_QUOTA
4583         for (i = 0; i < MAXQUOTAS; i++)
4584                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4585 #endif
4586         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4587         kvfree(options);
4588 free_sb_buf:
4589         kfree(raw_super);
4590 free_sbi:
4591         if (sbi->s_chksum_driver)
4592                 crypto_free_shash(sbi->s_chksum_driver);
4593         kfree(sbi);
4594
4595         /* give only one another chance */
4596         if (retry_cnt > 0 && skip_recovery) {
4597                 retry_cnt--;
4598                 shrink_dcache_sb(sb);
4599                 goto try_onemore;
4600         }
4601         return err;
4602 }
4603
4604 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4605                         const char *dev_name, void *data)
4606 {
4607         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4608 }
4609
4610 static void kill_f2fs_super(struct super_block *sb)
4611 {
4612         if (sb->s_root) {
4613                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4614
4615                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4616                 f2fs_stop_gc_thread(sbi);
4617                 f2fs_stop_discard_thread(sbi);
4618
4619 #ifdef CONFIG_F2FS_FS_COMPRESSION
4620                 /*
4621                  * latter evict_inode() can bypass checking and invalidating
4622                  * compress inode cache.
4623                  */
4624                 if (test_opt(sbi, COMPRESS_CACHE))
4625                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4626 #endif
4627
4628                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4629                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4630                         struct cp_control cpc = {
4631                                 .reason = CP_UMOUNT,
4632                         };
4633                         f2fs_write_checkpoint(sbi, &cpc);
4634                 }
4635
4636                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4637                         sb->s_flags &= ~SB_RDONLY;
4638         }
4639         kill_block_super(sb);
4640 }
4641
4642 static struct file_system_type f2fs_fs_type = {
4643         .owner          = THIS_MODULE,
4644         .name           = "f2fs",
4645         .mount          = f2fs_mount,
4646         .kill_sb        = kill_f2fs_super,
4647         .fs_flags       = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4648 };
4649 MODULE_ALIAS_FS("f2fs");
4650
4651 static int __init init_inodecache(void)
4652 {
4653         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4654                         sizeof(struct f2fs_inode_info), 0,
4655                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4656         return f2fs_inode_cachep ? 0 : -ENOMEM;
4657 }
4658
4659 static void destroy_inodecache(void)
4660 {
4661         /*
4662          * Make sure all delayed rcu free inodes are flushed before we
4663          * destroy cache.
4664          */
4665         rcu_barrier();
4666         kmem_cache_destroy(f2fs_inode_cachep);
4667 }
4668
4669 static int __init init_f2fs_fs(void)
4670 {
4671         int err;
4672
4673         if (PAGE_SIZE != F2FS_BLKSIZE) {
4674                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4675                                 PAGE_SIZE, F2FS_BLKSIZE);
4676                 return -EINVAL;
4677         }
4678
4679         err = init_inodecache();
4680         if (err)
4681                 goto fail;
4682         err = f2fs_create_node_manager_caches();
4683         if (err)
4684                 goto free_inodecache;
4685         err = f2fs_create_segment_manager_caches();
4686         if (err)
4687                 goto free_node_manager_caches;
4688         err = f2fs_create_checkpoint_caches();
4689         if (err)
4690                 goto free_segment_manager_caches;
4691         err = f2fs_create_recovery_cache();
4692         if (err)
4693                 goto free_checkpoint_caches;
4694         err = f2fs_create_extent_cache();
4695         if (err)
4696                 goto free_recovery_cache;
4697         err = f2fs_create_garbage_collection_cache();
4698         if (err)
4699                 goto free_extent_cache;
4700         err = f2fs_init_sysfs();
4701         if (err)
4702                 goto free_garbage_collection_cache;
4703         err = register_shrinker(&f2fs_shrinker_info, "f2fs-shrinker");
4704         if (err)
4705                 goto free_sysfs;
4706         err = register_filesystem(&f2fs_fs_type);
4707         if (err)
4708                 goto free_shrinker;
4709         f2fs_create_root_stats();
4710         err = f2fs_init_post_read_processing();
4711         if (err)
4712                 goto free_root_stats;
4713         err = f2fs_init_iostat_processing();
4714         if (err)
4715                 goto free_post_read;
4716         err = f2fs_init_bio_entry_cache();
4717         if (err)
4718                 goto free_iostat;
4719         err = f2fs_init_bioset();
4720         if (err)
4721                 goto free_bio_entry_cache;
4722         err = f2fs_init_compress_mempool();
4723         if (err)
4724                 goto free_bioset;
4725         err = f2fs_init_compress_cache();
4726         if (err)
4727                 goto free_compress_mempool;
4728         err = f2fs_create_casefold_cache();
4729         if (err)
4730                 goto free_compress_cache;
4731         return 0;
4732 free_compress_cache:
4733         f2fs_destroy_compress_cache();
4734 free_compress_mempool:
4735         f2fs_destroy_compress_mempool();
4736 free_bioset:
4737         f2fs_destroy_bioset();
4738 free_bio_entry_cache:
4739         f2fs_destroy_bio_entry_cache();
4740 free_iostat:
4741         f2fs_destroy_iostat_processing();
4742 free_post_read:
4743         f2fs_destroy_post_read_processing();
4744 free_root_stats:
4745         f2fs_destroy_root_stats();
4746         unregister_filesystem(&f2fs_fs_type);
4747 free_shrinker:
4748         unregister_shrinker(&f2fs_shrinker_info);
4749 free_sysfs:
4750         f2fs_exit_sysfs();
4751 free_garbage_collection_cache:
4752         f2fs_destroy_garbage_collection_cache();
4753 free_extent_cache:
4754         f2fs_destroy_extent_cache();
4755 free_recovery_cache:
4756         f2fs_destroy_recovery_cache();
4757 free_checkpoint_caches:
4758         f2fs_destroy_checkpoint_caches();
4759 free_segment_manager_caches:
4760         f2fs_destroy_segment_manager_caches();
4761 free_node_manager_caches:
4762         f2fs_destroy_node_manager_caches();
4763 free_inodecache:
4764         destroy_inodecache();
4765 fail:
4766         return err;
4767 }
4768
4769 static void __exit exit_f2fs_fs(void)
4770 {
4771         f2fs_destroy_casefold_cache();
4772         f2fs_destroy_compress_cache();
4773         f2fs_destroy_compress_mempool();
4774         f2fs_destroy_bioset();
4775         f2fs_destroy_bio_entry_cache();
4776         f2fs_destroy_iostat_processing();
4777         f2fs_destroy_post_read_processing();
4778         f2fs_destroy_root_stats();
4779         unregister_filesystem(&f2fs_fs_type);
4780         unregister_shrinker(&f2fs_shrinker_info);
4781         f2fs_exit_sysfs();
4782         f2fs_destroy_garbage_collection_cache();
4783         f2fs_destroy_extent_cache();
4784         f2fs_destroy_recovery_cache();
4785         f2fs_destroy_checkpoint_caches();
4786         f2fs_destroy_segment_manager_caches();
4787         f2fs_destroy_node_manager_caches();
4788         destroy_inodecache();
4789 }
4790
4791 module_init(init_f2fs_fs)
4792 module_exit(exit_f2fs_fs)
4793
4794 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4795 MODULE_DESCRIPTION("Flash Friendly File System");
4796 MODULE_LICENSE("GPL");
4797 MODULE_SOFTDEP("pre: crc32");
4798