fs/ntfs3/ntfs_fs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *
   4  * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
   5  *
   6  */
   7
   8 // clang-format off
   9 #ifndef _LINUX_NTFS3_NTFS_FS_H
  10 #define _LINUX_NTFS3_NTFS_FS_H
  11
  12 #include <linux/blkdev.h>
  13 #include <linux/buffer_head.h>
  14 #include <linux/fs.h>
  15 #include <linux/highmem.h>
  16 #include <linux/kernel.h>
  17 #include <linux/mm.h>
  18 #include <linux/mutex.h>
  19 #include <linux/page-flags.h>
  20 #include <linux/pagemap.h>
  21 #include <linux/rbtree.h>
  22 #include <linux/rwsem.h>
  23 #include <linux/slab.h>
  24 #include <linux/string.h>
  25 #include <linux/time64.h>
  26 #include <linux/types.h>
  27 #include <linux/uidgid.h>
  28 #include <asm/div64.h>
  29 #include <asm/page.h>
  30
  31 #include "debug.h"
  32 #include "ntfs.h"
  33
  34 struct dentry;
  35 struct fiemap_extent_info;
  36 struct user_namespace;
  37 struct page;
  38 struct writeback_control;
  39 enum utf16_endian;
  40
  41
  42 #define MINUS_ONE_T                     ((size_t)(-1))
  43 /* Biggest MFT / smallest cluster */
  44 #define MAXIMUM_BYTES_PER_MFT           4096
  45 #define MAXIMUM_SHIFT_BYTES_PER_MFT     12
  46 #define NTFS_BLOCKS_PER_MFT_RECORD      (MAXIMUM_BYTES_PER_MFT / 512)
  47
  48 #define MAXIMUM_BYTES_PER_INDEX         4096
  49 #define MAXIMUM_SHIFT_BYTES_PER_INDEX   12
  50 #define NTFS_BLOCKS_PER_INODE           (MAXIMUM_BYTES_PER_INDEX / 512)
  51
  52 /* NTFS specific error code when fixup failed. */
  53 #define E_NTFS_FIXUP                    555
  54 /* NTFS specific error code about resident->nonresident. */
  55 #define E_NTFS_NONRESIDENT              556
  56 /* NTFS specific error code about punch hole. */
  57 #define E_NTFS_NOTALIGNED               557
  58 /* NTFS specific error code when on-disk struct is corrupted. */
  59 #define E_NTFS_CORRUPT                  558
  60
  61
  62 /* sbi->flags */
  63 #define NTFS_FLAGS_NODISCARD            0x00000001
  64 /* Set when LogFile is replaying. */
  65 #define NTFS_FLAGS_LOG_REPLAYING        0x00000008
  66 /* Set when we changed first MFT's which copy must be updated in $MftMirr. */
  67 #define NTFS_FLAGS_MFTMIRR              0x00001000
  68 #define NTFS_FLAGS_NEED_REPLAY          0x04000000
  69
  70
  71 /* ni->ni_flags */
  72 /*
  73  * Data attribute is external compressed (LZX/Xpress)
  74  * 1 - WOF_COMPRESSION_XPRESS4K
  75  * 2 - WOF_COMPRESSION_XPRESS8K
  76  * 3 - WOF_COMPRESSION_XPRESS16K
  77  * 4 - WOF_COMPRESSION_LZX32K
  78  */
  79 #define NI_FLAG_COMPRESSED_MASK         0x0000000f
  80 /* Data attribute is deduplicated. */
  81 #define NI_FLAG_DEDUPLICATED            0x00000010
  82 #define NI_FLAG_EA                      0x00000020
  83 #define NI_FLAG_DIR                     0x00000040
  84 #define NI_FLAG_RESIDENT                0x00000080
  85 #define NI_FLAG_UPDATE_PARENT           0x00000100
  86 // clang-format on
  87
  88 struct ntfs_mount_options {
  89         char *nls_name;
  90         struct nls_table *nls;
  91
  92         kuid_t fs_uid;
  93         kgid_t fs_gid;
  94         u16 fs_fmask_inv;
  95         u16 fs_dmask_inv;
  96
  97         unsigned fmask : 1; /* fmask was set. */
  98         unsigned dmask : 1; /*dmask was set. */
  99         unsigned sys_immutable : 1; /* Immutable system files. */
 100         unsigned discard : 1; /* Issue discard requests on deletions. */
 101         unsigned sparse : 1; /* Create sparse files. */
 102         unsigned showmeta : 1; /* Show meta files. */
 103         unsigned nohidden : 1; /* Do not show hidden files. */
 104         unsigned hide_dot_files : 1; /* Set hidden flag on dot files. */
 105         unsigned windows_names : 1; /* Disallow names forbidden by Windows. */
 106         unsigned force : 1; /* RW mount dirty volume. */
 107         unsigned prealloc : 1; /* Preallocate space when file is growing. */
 108         unsigned nocase : 1; /* case insensitive. */
 109 };
 110
 111 /* Special value to unpack and deallocate. */
 112 #define RUN_DEALLOCATE ((struct runs_tree *)(size_t)1)
 113
 114 /* TODO: Use rb tree instead of array. */
 115 struct runs_tree {
 116         struct ntfs_run *runs;
 117         size_t count; /* Currently used size a ntfs_run storage. */
 118         size_t allocated; /* Currently allocated ntfs_run storage size. */
 119 };
 120
 121 struct ntfs_buffers {
 122         /* Biggest MFT / smallest cluster = 4096 / 512 = 8 */
 123         /* Biggest index / smallest cluster = 4096 / 512 = 8 */
 124         struct buffer_head *bh[PAGE_SIZE >> SECTOR_SHIFT];
 125         u32 bytes;
 126         u32 nbufs;
 127         u32 off;
 128 };
 129
 130 enum ALLOCATE_OPT {
 131         ALLOCATE_DEF = 0, // Allocate all clusters.
 132         ALLOCATE_MFT = 1, // Allocate for MFT.
 133         ALLOCATE_ZERO = 2, // Zeroout new allocated clusters
 134 };
 135
 136 enum bitmap_mutex_classes {
 137         BITMAP_MUTEX_CLUSTERS = 0,
 138         BITMAP_MUTEX_MFT = 1,
 139 };
 140
 141 struct wnd_bitmap {
 142         struct super_block *sb;
 143         struct rw_semaphore rw_lock;
 144
 145         struct runs_tree run;
 146         size_t nbits;
 147
 148         size_t total_zeroes; // Total number of free bits.
 149         u16 *free_bits; // Free bits in each window.
 150         size_t nwnd;
 151         u32 bits_last; // Bits in last window.
 152
 153         struct rb_root start_tree; // Extents, sorted by 'start'.
 154         struct rb_root count_tree; // Extents, sorted by 'count + start'.
 155         size_t count; // Extents count.
 156
 157         /*
 158          * -1 Tree is activated but not updated (too many fragments).
 159          * 0 - Tree is not activated.
 160          * 1 - Tree is activated and updated.
 161          */
 162         int uptodated;
 163         size_t extent_min; // Minimal extent used while building.
 164         size_t extent_max; // Upper estimate of biggest free block.
 165
 166         /* Zone [bit, end) */
 167         size_t zone_bit;
 168         size_t zone_end;
 169
 170         bool inited;
 171 };
 172
 173 typedef int (*NTFS_CMP_FUNC)(const void *key1, size_t len1, const void *key2,
 174                              size_t len2, const void *param);
 175
 176 enum index_mutex_classed {
 177         INDEX_MUTEX_I30 = 0,
 178         INDEX_MUTEX_SII = 1,
 179         INDEX_MUTEX_SDH = 2,
 180         INDEX_MUTEX_SO = 3,
 181         INDEX_MUTEX_SQ = 4,
 182         INDEX_MUTEX_SR = 5,
 183         INDEX_MUTEX_TOTAL
 184 };
 185
 186 /* ntfs_index - Allocation unit inside directory. */
 187 struct ntfs_index {
 188         struct runs_tree bitmap_run;
 189         struct runs_tree alloc_run;
 190         /* read/write access to 'bitmap_run'/'alloc_run' while ntfs_readdir */
 191         struct rw_semaphore run_lock;
 192
 193         /*TODO: Remove 'cmp'. */
 194         NTFS_CMP_FUNC cmp;
 195
 196         u8 index_bits; // log2(root->index_block_size)
 197         u8 idx2vbn_bits; // log2(root->index_block_clst)
 198         u8 vbn2vbo_bits; // index_block_size < cluster? 9 : cluster_bits
 199         u8 type; // index_mutex_classed
 200 };
 201
 202 /* Minimum MFT zone. */
 203 #define NTFS_MIN_MFT_ZONE 100
 204 /* Step to increase the MFT. */
 205 #define NTFS_MFT_INCREASE_STEP 1024
 206
 207 /* Ntfs file system in-core superblock data. */
 208 struct ntfs_sb_info {
 209         struct super_block *sb;
 210
 211         u32 discard_granularity;
 212         u64 discard_granularity_mask_inv; // ~(discard_granularity_mask_inv-1)
 213
 214         u32 cluster_size; // bytes per cluster
 215         u32 cluster_mask; // == cluster_size - 1
 216         u64 cluster_mask_inv; // ~(cluster_size - 1)
 217         u32 block_mask; // sb->s_blocksize - 1
 218         u32 blocks_per_cluster; // cluster_size / sb->s_blocksize
 219
 220         u32 record_size;
 221         u32 index_size;
 222
 223         u8 cluster_bits;
 224         u8 record_bits;
 225
 226         u64 maxbytes; // Maximum size for normal files.
 227         u64 maxbytes_sparse; // Maximum size for sparse file.
 228
 229         u32 flags; // See NTFS_FLAGS_XXX.
 230
 231         CLST zone_max; // Maximum MFT zone length in clusters
 232         CLST bad_clusters; // The count of marked bad clusters.
 233
 234         u16 max_bytes_per_attr; // Maximum attribute size in record.
 235         u16 attr_size_tr; // Attribute size threshold (320 bytes).
 236
 237         /* Records in $Extend. */
 238         CLST objid_no;
 239         CLST quota_no;
 240         CLST reparse_no;
 241         CLST usn_jrnl_no;
 242
 243         struct ATTR_DEF_ENTRY *def_table; // Attribute definition table.
 244         u32 def_entries;
 245         u32 ea_max_size;
 246
 247         struct MFT_REC *new_rec;
 248
 249         u16 *upcase;
 250
 251         struct {
 252                 u64 lbo, lbo2;
 253                 struct ntfs_inode *ni;
 254                 struct wnd_bitmap bitmap; // $MFT::Bitmap
 255                 /*
 256                  * MFT records [11-24) used to expand MFT itself.
 257                  * They always marked as used in $MFT::Bitmap
 258                  * 'reserved_bitmap' contains real bitmap of these records.
 259                  */
 260                 ulong reserved_bitmap; // Bitmap of used records [11 - 24)
 261                 size_t next_free; // The next record to allocate from
 262                 size_t used; // MFT valid size in records.
 263                 u32 recs_mirr; // Number of records in MFTMirr
 264                 u8 next_reserved;
 265                 u8 reserved_bitmap_inited;
 266         } mft;
 267
 268         struct {
 269                 struct wnd_bitmap bitmap; // $Bitmap::Data
 270                 CLST next_free_lcn;
 271         } used;
 272
 273         struct {
 274                 u64 size; // In bytes.
 275                 u64 blocks; // In blocks.
 276                 u64 ser_num;
 277                 struct ntfs_inode *ni;
 278                 __le16 flags; // Cached current VOLUME_INFO::flags, VOLUME_FLAG_DIRTY.
 279                 u8 major_ver;
 280                 u8 minor_ver;
 281                 char label[256];
 282                 bool real_dirty; // Real fs state.
 283         } volume;
 284
 285         struct {
 286                 struct ntfs_index index_sii;
 287                 struct ntfs_index index_sdh;
 288                 struct ntfs_inode *ni;
 289                 u32 next_id;
 290                 u64 next_off;
 291                 __le32 def_security_id;
 292         } security;
 293
 294         struct {
 295                 struct ntfs_index index_r;
 296                 struct ntfs_inode *ni;
 297                 u64 max_size; // 16K
 298         } reparse;
 299
 300         struct {
 301                 struct ntfs_index index_o;
 302                 struct ntfs_inode *ni;
 303         } objid;
 304
 305         struct {
 306                 struct mutex mtx_lznt;
 307                 struct lznt *lznt;
 308 #ifdef CONFIG_NTFS3_LZX_XPRESS
 309                 struct mutex mtx_xpress;
 310                 struct xpress_decompressor *xpress;
 311                 struct mutex mtx_lzx;
 312                 struct lzx_decompressor *lzx;
 313 #endif
 314         } compress;
 315
 316         struct ntfs_mount_options *options;
 317         struct ratelimit_state msg_ratelimit;
 318         struct proc_dir_entry *procdir;
 319 };
 320
 321 /* One MFT record(usually 1024 bytes), consists of attributes. */
 322 struct mft_inode {
 323         struct rb_node node;
 324         struct ntfs_sb_info *sbi;
 325
 326         struct MFT_REC *mrec;
 327         struct ntfs_buffers nb;
 328
 329         CLST rno;
 330         bool dirty;
 331 };
 332
 333 /* Nested class for ntfs_inode::ni_lock. */
 334 enum ntfs_inode_mutex_lock_class {
 335         NTFS_INODE_MUTEX_DIRTY,
 336         NTFS_INODE_MUTEX_SECURITY,
 337         NTFS_INODE_MUTEX_OBJID,
 338         NTFS_INODE_MUTEX_REPARSE,
 339         NTFS_INODE_MUTEX_NORMAL,
 340         NTFS_INODE_MUTEX_PARENT,
 341         NTFS_INODE_MUTEX_PARENT2,
 342 };
 343
 344 /*
 345  * struct ntfs_inode
 346  *
 347  * Ntfs inode - extends linux inode. consists of one or more MFT inodes.
 348  */
 349 struct ntfs_inode {
 350         struct mft_inode mi; // base record
 351
 352         /*
 353          * Valid size: [0 - i_valid) - these range in file contains valid data.
 354          * Range [i_valid - inode->i_size) - contains 0.
 355          * Usually i_valid <= inode->i_size.
 356          */
 357         u64 i_valid;
 358         struct timespec64 i_crtime;
 359
 360         struct mutex ni_lock;
 361
 362         /* File attributes from std. */
 363         enum FILE_ATTRIBUTE std_fa;
 364         __le32 std_security_id;
 365
 366         /*
 367          * Tree of mft_inode.
 368          * Not empty when primary MFT record (usually 1024 bytes) can't save all attributes
 369          * e.g. file becomes too fragmented or contains a lot of names.
 370          */
 371         struct rb_root mi_tree;
 372
 373         /*
 374          * This member is used in ntfs_readdir to ensure that all subrecords are loaded
 375          */
 376         u8 mi_loaded;
 377
 378         union {
 379                 struct ntfs_index dir;
 380                 struct {
 381                         struct rw_semaphore run_lock;
 382                         struct runs_tree run;
 383 #ifdef CONFIG_NTFS3_LZX_XPRESS
 384                         struct page *offs_page;
 385 #endif
 386                 } file;
 387         };
 388
 389         struct {
 390                 struct runs_tree run;
 391                 struct ATTR_LIST_ENTRY *le; // 1K aligned memory.
 392                 size_t size;
 393                 bool dirty;
 394         } attr_list;
 395
 396         size_t ni_flags; // NI_FLAG_XXX
 397
 398         struct inode vfs_inode;
 399 };
 400
 401 struct indx_node {
 402         struct ntfs_buffers nb;
 403         struct INDEX_BUFFER *index;
 404 };
 405
 406 struct ntfs_fnd {
 407         int level;
 408         struct indx_node *nodes[20];
 409         struct NTFS_DE *de[20];
 410         struct NTFS_DE *root_de;
 411 };
 412
 413 enum REPARSE_SIGN {
 414         REPARSE_NONE = 0,
 415         REPARSE_COMPRESSED = 1,
 416         REPARSE_DEDUPLICATED = 2,
 417         REPARSE_LINK = 3
 418 };
 419
 420 /* Functions from attrib.c */
 421 int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
 422                            CLST vcn, CLST lcn, CLST len, CLST *pre_alloc,
 423                            enum ALLOCATE_OPT opt, CLST *alen, const size_t fr,
 424                            CLST *new_lcn, CLST *new_len);
 425 int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
 426                           struct ATTR_LIST_ENTRY *le, struct mft_inode *mi,
 427                           u64 new_size, struct runs_tree *run,
 428                           struct ATTRIB **ins_attr, struct page *page);
 429 int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
 430                   const __le16 *name, u8 name_len, struct runs_tree *run,
 431                   u64 new_size, const u64 *new_valid, bool keep_prealloc,
 432                   struct ATTRIB **ret);
 433 int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
 434                         CLST *len, bool *new, bool zero);
 435 int attr_data_read_resident(struct ntfs_inode *ni, struct page *page);
 436 int attr_data_write_resident(struct ntfs_inode *ni, struct page *page);
 437 int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type,
 438                        const __le16 *name, u8 name_len, struct runs_tree *run,
 439                        CLST vcn);
 440 int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type,
 441                          const __le16 *name, u8 name_len, struct runs_tree *run,
 442                          u64 from, u64 to);
 443 int attr_wof_frame_info(struct ntfs_inode *ni, struct ATTRIB *attr,
 444                         struct runs_tree *run, u64 frame, u64 frames,
 445                         u8 frame_bits, u32 *ondisk_size, u64 *vbo_data);
 446 int attr_is_frame_compressed(struct ntfs_inode *ni, struct ATTRIB *attr,
 447                              CLST frame, CLST *clst_data);
 448 int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size,
 449                         u64 new_valid);
 450 int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes);
 451 int attr_insert_range(struct ntfs_inode *ni, u64 vbo, u64 bytes);
 452 int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size);
 453
 454 /* Functions from attrlist.c */
 455 void al_destroy(struct ntfs_inode *ni);
 456 bool al_verify(struct ntfs_inode *ni);
 457 int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr);
 458 struct ATTR_LIST_ENTRY *al_enumerate(struct ntfs_inode *ni,
 459                                      struct ATTR_LIST_ENTRY *le);
 460 struct ATTR_LIST_ENTRY *al_find_le(struct ntfs_inode *ni,
 461                                    struct ATTR_LIST_ENTRY *le,
 462                                    const struct ATTRIB *attr);
 463 struct ATTR_LIST_ENTRY *al_find_ex(struct ntfs_inode *ni,
 464                                    struct ATTR_LIST_ENTRY *le,
 465                                    enum ATTR_TYPE type, const __le16 *name,
 466                                    u8 name_len, const CLST *vcn);
 467 int al_add_le(struct ntfs_inode *ni, enum ATTR_TYPE type, const __le16 *name,
 468               u8 name_len, CLST svcn, __le16 id, const struct MFT_REF *ref,
 469               struct ATTR_LIST_ENTRY **new_le);
 470 bool al_remove_le(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le);
 471 bool al_delete_le(struct ntfs_inode *ni, enum ATTR_TYPE type, CLST vcn,
 472                   const __le16 *name, u8 name_len, const struct MFT_REF *ref);
 473 int al_update(struct ntfs_inode *ni, int sync);
 474 static inline size_t al_aligned(size_t size)
 475 {
 476         return (size + 1023) & ~(size_t)1023;
 477 }
 478
 479 /* Globals from bitfunc.c */
 480 bool are_bits_clear(const void *map, size_t bit, size_t nbits);
 481 bool are_bits_set(const void *map, size_t bit, size_t nbits);
 482 size_t get_set_bits_ex(const void *map, size_t bit, size_t nbits);
 483
 484 /* Globals from dir.c */
 485 int ntfs_utf16_to_nls(struct ntfs_sb_info *sbi, const __le16 *name, u32 len,
 486                       u8 *buf, int buf_len);
 487 int ntfs_nls_to_utf16(struct ntfs_sb_info *sbi, const u8 *name, u32 name_len,
 488                       struct cpu_str *uni, u32 max_ulen,
 489                       enum utf16_endian endian);
 490 struct inode *dir_search_u(struct inode *dir, const struct cpu_str *uni,
 491                            struct ntfs_fnd *fnd);
 492 bool dir_is_empty(struct inode *dir);
 493 extern const struct file_operations ntfs_dir_operations;
 494
 495 /* Globals from file.c */
 496 int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path,
 497                  struct kstat *stat, u32 request_mask, u32 flags);
 498 int ntfs3_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 499                   struct iattr *attr);
 500 int ntfs_file_open(struct inode *inode, struct file *file);
 501 int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 502                 __u64 start, __u64 len);
 503 extern const struct inode_operations ntfs_special_inode_operations;
 504 extern const struct inode_operations ntfs_file_inode_operations;
 505 extern const struct file_operations ntfs_file_operations;
 506
 507 /* Globals from frecord.c */
 508 void ni_remove_mi(struct ntfs_inode *ni, struct mft_inode *mi);
 509 struct ATTR_STD_INFO *ni_std(struct ntfs_inode *ni);
 510 struct ATTR_STD_INFO5 *ni_std5(struct ntfs_inode *ni);
 511 void ni_clear(struct ntfs_inode *ni);
 512 int ni_load_mi_ex(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
 513 int ni_load_mi(struct ntfs_inode *ni, const struct ATTR_LIST_ENTRY *le,
 514                struct mft_inode **mi);
 515 struct ATTRIB *ni_find_attr(struct ntfs_inode *ni, struct ATTRIB *attr,
 516                             struct ATTR_LIST_ENTRY **entry_o,
 517                             enum ATTR_TYPE type, const __le16 *name,
 518                             u8 name_len, const CLST *vcn,
 519                             struct mft_inode **mi);
 520 struct ATTRIB *ni_enum_attr_ex(struct ntfs_inode *ni, struct ATTRIB *attr,
 521                                struct ATTR_LIST_ENTRY **le,
 522                                struct mft_inode **mi);
 523 struct ATTRIB *ni_load_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
 524                             const __le16 *name, u8 name_len, CLST vcn,
 525                             struct mft_inode **pmi);
 526 int ni_load_all_mi(struct ntfs_inode *ni);
 527 bool ni_add_subrecord(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
 528 int ni_remove_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
 529                    const __le16 *name, u8 name_len, bool base_only,
 530                    const __le16 *id);
 531 int ni_create_attr_list(struct ntfs_inode *ni);
 532 int ni_expand_list(struct ntfs_inode *ni);
 533 int ni_insert_nonresident(struct ntfs_inode *ni, enum ATTR_TYPE type,
 534                           const __le16 *name, u8 name_len,
 535                           const struct runs_tree *run, CLST svcn, CLST len,
 536                           __le16 flags, struct ATTRIB **new_attr,
 537                           struct mft_inode **mi, struct ATTR_LIST_ENTRY **le);
 538 int ni_insert_resident(struct ntfs_inode *ni, u32 data_size,
 539                        enum ATTR_TYPE type, const __le16 *name, u8 name_len,
 540                        struct ATTRIB **new_attr, struct mft_inode **mi,
 541                        struct ATTR_LIST_ENTRY **le);
 542 void ni_remove_attr_le(struct ntfs_inode *ni, struct ATTRIB *attr,
 543                        struct mft_inode *mi, struct ATTR_LIST_ENTRY *le);
 544 int ni_delete_all(struct ntfs_inode *ni);
 545 struct ATTR_FILE_NAME *ni_fname_name(struct ntfs_inode *ni,
 546                                      const struct le_str *uni,
 547                                      const struct MFT_REF *home,
 548                                      struct mft_inode **mi,
 549                                      struct ATTR_LIST_ENTRY **entry);
 550 struct ATTR_FILE_NAME *ni_fname_type(struct ntfs_inode *ni, u8 name_type,
 551                                      struct mft_inode **mi,
 552                                      struct ATTR_LIST_ENTRY **entry);
 553 int ni_new_attr_flags(struct ntfs_inode *ni, enum FILE_ATTRIBUTE new_fa);
 554 enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
 555                                    struct REPARSE_DATA_BUFFER *buffer);
 556 int ni_write_inode(struct inode *inode, int sync, const char *hint);
 557 #define _ni_write_inode(i, w) ni_write_inode(i, w, __func__)
 558 int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
 559               __u64 vbo, __u64 len);
 560 int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page);
 561 int ni_decompress_file(struct ntfs_inode *ni);
 562 int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
 563                   u32 pages_per_frame);
 564 int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
 565                    u32 pages_per_frame);
 566 int ni_remove_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
 567                    struct NTFS_DE *de, struct NTFS_DE **de2, int *undo_step);
 568
 569 bool ni_remove_name_undo(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
 570                          struct NTFS_DE *de, struct NTFS_DE *de2,
 571                          int undo_step);
 572
 573 int ni_add_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
 574                 struct NTFS_DE *de);
 575
 576 int ni_rename(struct ntfs_inode *dir_ni, struct ntfs_inode *new_dir_ni,
 577               struct ntfs_inode *ni, struct NTFS_DE *de, struct NTFS_DE *new_de,
 578               bool *is_bad);
 579
 580 bool ni_is_dirty(struct inode *inode);
 581
 582 /* Globals from fslog.c */
 583 bool check_index_header(const struct INDEX_HDR *hdr, size_t bytes);
 584 int log_replay(struct ntfs_inode *ni, bool *initialized);
 585
 586 /* Globals from fsntfs.c */
 587 bool ntfs_fix_pre_write(struct NTFS_RECORD_HEADER *rhdr, size_t bytes);
 588 int ntfs_fix_post_read(struct NTFS_RECORD_HEADER *rhdr, size_t bytes,
 589                        bool simple);
 590 int ntfs_extend_init(struct ntfs_sb_info *sbi);
 591 int ntfs_loadlog_and_replay(struct ntfs_inode *ni, struct ntfs_sb_info *sbi);
 592 int ntfs_look_for_free_space(struct ntfs_sb_info *sbi, CLST lcn, CLST len,
 593                              CLST *new_lcn, CLST *new_len,
 594                              enum ALLOCATE_OPT opt);
 595 bool ntfs_check_for_free_space(struct ntfs_sb_info *sbi, CLST clen, CLST mlen);
 596 int ntfs_look_free_mft(struct ntfs_sb_info *sbi, CLST *rno, bool mft,
 597                        struct ntfs_inode *ni, struct mft_inode **mi);
 598 void ntfs_mark_rec_free(struct ntfs_sb_info *sbi, CLST rno, bool is_mft);
 599 int ntfs_clear_mft_tail(struct ntfs_sb_info *sbi, size_t from, size_t to);
 600 int ntfs_refresh_zone(struct ntfs_sb_info *sbi);
 601 void ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait);
 602 void ntfs_bad_inode(struct inode *inode, const char *hint);
 603 #define _ntfs_bad_inode(i) ntfs_bad_inode(i, __func__)
 604 enum NTFS_DIRTY_FLAGS {
 605         NTFS_DIRTY_CLEAR = 0,
 606         NTFS_DIRTY_DIRTY = 1,
 607         NTFS_DIRTY_ERROR = 2,
 608 };
 609 int ntfs_set_state(struct ntfs_sb_info *sbi, enum NTFS_DIRTY_FLAGS dirty);
 610 int ntfs_sb_read(struct super_block *sb, u64 lbo, size_t bytes, void *buffer);
 611 int ntfs_sb_write(struct super_block *sb, u64 lbo, size_t bytes,
 612                   const void *buffer, int wait);
 613 int ntfs_sb_write_run(struct ntfs_sb_info *sbi, const struct runs_tree *run,
 614                       u64 vbo, const void *buf, size_t bytes, int sync);
 615 struct buffer_head *ntfs_bread_run(struct ntfs_sb_info *sbi,
 616                                    const struct runs_tree *run, u64 vbo);
 617 int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run,
 618                      u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb);
 619 int ntfs_read_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
 620                  struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
 621                  struct ntfs_buffers *nb);
 622 int ntfs_get_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
 623                 u32 bytes, struct ntfs_buffers *nb);
 624 int ntfs_write_bh(struct ntfs_sb_info *sbi, struct NTFS_RECORD_HEADER *rhdr,
 625                   struct ntfs_buffers *nb, int sync);
 626 int ntfs_bio_pages(struct ntfs_sb_info *sbi, const struct runs_tree *run,
 627                    struct page **pages, u32 nr_pages, u64 vbo, u32 bytes,
 628                    enum req_op op);
 629 int ntfs_bio_fill_1(struct ntfs_sb_info *sbi, const struct runs_tree *run);
 630 int ntfs_vbo_to_lbo(struct ntfs_sb_info *sbi, const struct runs_tree *run,
 631                     u64 vbo, u64 *lbo, u64 *bytes);
 632 struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST nRec,
 633                                   enum RECORD_FLAG flag);
 634 extern const u8 s_default_security[0x50];
 635 bool is_sd_valid(const struct SECURITY_DESCRIPTOR_RELATIVE *sd, u32 len);
 636 int ntfs_security_init(struct ntfs_sb_info *sbi);
 637 int ntfs_get_security_by_id(struct ntfs_sb_info *sbi, __le32 security_id,
 638                             struct SECURITY_DESCRIPTOR_RELATIVE **sd,
 639                             size_t *size);
 640 int ntfs_insert_security(struct ntfs_sb_info *sbi,
 641                          const struct SECURITY_DESCRIPTOR_RELATIVE *sd,
 642                          u32 size, __le32 *security_id, bool *inserted);
 643 int ntfs_reparse_init(struct ntfs_sb_info *sbi);
 644 int ntfs_objid_init(struct ntfs_sb_info *sbi);
 645 int ntfs_objid_remove(struct ntfs_sb_info *sbi, struct GUID *guid);
 646 int ntfs_insert_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
 647                         const struct MFT_REF *ref);
 648 int ntfs_remove_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
 649                         const struct MFT_REF *ref);
 650 void mark_as_free_ex(struct ntfs_sb_info *sbi, CLST lcn, CLST len, bool trim);
 651 int run_deallocate(struct ntfs_sb_info *sbi, const struct runs_tree *run,
 652                    bool trim);
 653 bool valid_windows_name(struct ntfs_sb_info *sbi, const struct le_str *name);
 654 int ntfs_set_label(struct ntfs_sb_info *sbi, u8 *label, int len);
 655
 656 /* Globals from index.c */
 657 int indx_used_bit(struct ntfs_index *indx, struct ntfs_inode *ni, size_t *bit);
 658 void fnd_clear(struct ntfs_fnd *fnd);
 659 static inline struct ntfs_fnd *fnd_get(void)
 660 {
 661         return kzalloc(sizeof(struct ntfs_fnd), GFP_NOFS);
 662 }
 663 static inline void fnd_put(struct ntfs_fnd *fnd)
 664 {
 665         if (fnd) {
 666                 fnd_clear(fnd);
 667                 kfree(fnd);
 668         }
 669 }
 670 void indx_clear(struct ntfs_index *idx);
 671 int indx_init(struct ntfs_index *indx, struct ntfs_sb_info *sbi,
 672               const struct ATTRIB *attr, enum index_mutex_classed type);
 673 struct INDEX_ROOT *indx_get_root(struct ntfs_index *indx, struct ntfs_inode *ni,
 674                                  struct ATTRIB **attr, struct mft_inode **mi);
 675 int indx_read(struct ntfs_index *idx, struct ntfs_inode *ni, CLST vbn,
 676               struct indx_node **node);
 677 int indx_find(struct ntfs_index *indx, struct ntfs_inode *dir,
 678               const struct INDEX_ROOT *root, const void *Key, size_t KeyLen,
 679               const void *param, int *diff, struct NTFS_DE **entry,
 680               struct ntfs_fnd *fnd);
 681 int indx_find_sort(struct ntfs_index *indx, struct ntfs_inode *ni,
 682                    const struct INDEX_ROOT *root, struct NTFS_DE **entry,
 683                    struct ntfs_fnd *fnd);
 684 int indx_find_raw(struct ntfs_index *indx, struct ntfs_inode *ni,
 685                   const struct INDEX_ROOT *root, struct NTFS_DE **entry,
 686                   size_t *off, struct ntfs_fnd *fnd);
 687 int indx_insert_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
 688                       const struct NTFS_DE *new_de, const void *param,
 689                       struct ntfs_fnd *fnd, bool undo);
 690 int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
 691                       const void *key, u32 key_len, const void *param);
 692 int indx_update_dup(struct ntfs_inode *ni, struct ntfs_sb_info *sbi,
 693                     const struct ATTR_FILE_NAME *fname,
 694                     const struct NTFS_DUP_INFO *dup, int sync);
 695
 696 /* Globals from inode.c */
 697 struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
 698                          const struct cpu_str *name);
 699 int ntfs_set_size(struct inode *inode, u64 new_size);
 700 int reset_log_file(struct inode *inode);
 701 int ntfs_get_block(struct inode *inode, sector_t vbn,
 702                    struct buffer_head *bh_result, int create);
 703 int ntfs_write_begin(struct file *file, struct address_space *mapping,
 704                      loff_t pos, u32 len, struct page **pagep, void **fsdata);
 705 int ntfs_write_end(struct file *file, struct address_space *mapping, loff_t pos,
 706                    u32 len, u32 copied, struct page *page, void *fsdata);
 707 int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc);
 708 int ntfs_sync_inode(struct inode *inode);
 709 int ntfs_flush_inodes(struct super_block *sb, struct inode *i1,
 710                       struct inode *i2);
 711 int inode_write_data(struct inode *inode, const void *data, size_t bytes);
 712 struct inode *ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir,
 713                                 struct dentry *dentry,
 714                                 const struct cpu_str *uni, umode_t mode,
 715                                 dev_t dev, const char *symname, u32 size,
 716                                 struct ntfs_fnd *fnd);
 717 int ntfs_link_inode(struct inode *inode, struct dentry *dentry);
 718 int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry);
 719 void ntfs_evict_inode(struct inode *inode);
 720 extern const struct inode_operations ntfs_link_inode_operations;
 721 extern const struct address_space_operations ntfs_aops;
 722 extern const struct address_space_operations ntfs_aops_cmpr;
 723
 724 /* Globals from name_i.c */
 725 int fill_name_de(struct ntfs_sb_info *sbi, void *buf, const struct qstr *name,
 726                  const struct cpu_str *uni);
 727 struct dentry *ntfs3_get_parent(struct dentry *child);
 728
 729 extern const struct inode_operations ntfs_dir_inode_operations;
 730 extern const struct inode_operations ntfs_special_inode_operations;
 731 extern const struct dentry_operations ntfs_dentry_ops;
 732
 733 /* Globals from record.c */
 734 int mi_get(struct ntfs_sb_info *sbi, CLST rno, struct mft_inode **mi);
 735 void mi_put(struct mft_inode *mi);
 736 int mi_init(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno);
 737 int mi_read(struct mft_inode *mi, bool is_mft);
 738 struct ATTRIB *mi_enum_attr(struct mft_inode *mi, struct ATTRIB *attr);
 739 // TODO: id?
 740 struct ATTRIB *mi_find_attr(struct mft_inode *mi, struct ATTRIB *attr,
 741                             enum ATTR_TYPE type, const __le16 *name,
 742                             u8 name_len, const __le16 *id);
 743 static inline struct ATTRIB *rec_find_attr_le(struct mft_inode *rec,
 744                                               struct ATTR_LIST_ENTRY *le)
 745 {
 746         return mi_find_attr(rec, NULL, le->type, le_name(le), le->name_len,
 747                             &le->id);
 748 }
 749 int mi_write(struct mft_inode *mi, int wait);
 750 int mi_format_new(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno,
 751                   __le16 flags, bool is_mft);
 752 struct ATTRIB *mi_insert_attr(struct mft_inode *mi, enum ATTR_TYPE type,
 753                               const __le16 *name, u8 name_len, u32 asize,
 754                               u16 name_off);
 755
 756 bool mi_remove_attr(struct ntfs_inode *ni, struct mft_inode *mi,
 757                     struct ATTRIB *attr);
 758 bool mi_resize_attr(struct mft_inode *mi, struct ATTRIB *attr, int bytes);
 759 int mi_pack_runs(struct mft_inode *mi, struct ATTRIB *attr,
 760                  struct runs_tree *run, CLST len);
 761 static inline bool mi_is_ref(const struct mft_inode *mi,
 762                              const struct MFT_REF *ref)
 763 {
 764         if (le32_to_cpu(ref->low) != mi->rno)
 765                 return false;
 766         if (ref->seq != mi->mrec->seq)
 767                 return false;
 768
 769 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
 770         return le16_to_cpu(ref->high) == (mi->rno >> 32);
 771 #else
 772         return !ref->high;
 773 #endif
 774 }
 775
 776 static inline void mi_get_ref(const struct mft_inode *mi, struct MFT_REF *ref)
 777 {
 778         ref->low = cpu_to_le32(mi->rno);
 779 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
 780         ref->high = cpu_to_le16(mi->rno >> 32);
 781 #else
 782         ref->high = 0;
 783 #endif
 784         ref->seq = mi->mrec->seq;
 785 }
 786
 787 /* Globals from run.c */
 788 bool run_lookup_entry(const struct runs_tree *run, CLST vcn, CLST *lcn,
 789                       CLST *len, size_t *index);
 790 void run_truncate(struct runs_tree *run, CLST vcn);
 791 void run_truncate_head(struct runs_tree *run, CLST vcn);
 792 void run_truncate_around(struct runs_tree *run, CLST vcn);
 793 bool run_add_entry(struct runs_tree *run, CLST vcn, CLST lcn, CLST len,
 794                    bool is_mft);
 795 bool run_collapse_range(struct runs_tree *run, CLST vcn, CLST len);
 796 bool run_insert_range(struct runs_tree *run, CLST vcn, CLST len);
 797 bool run_get_entry(const struct runs_tree *run, size_t index, CLST *vcn,
 798                    CLST *lcn, CLST *len);
 799 bool run_is_mapped_full(const struct runs_tree *run, CLST svcn, CLST evcn);
 800
 801 int run_pack(const struct runs_tree *run, CLST svcn, CLST len, u8 *run_buf,
 802              u32 run_buf_size, CLST *packed_vcns);
 803 int run_unpack(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
 804                CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
 805                int run_buf_size);
 806
 807 #ifdef NTFS3_CHECK_FREE_CLST
 808 int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
 809                   CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
 810                   int run_buf_size);
 811 #else
 812 #define run_unpack_ex run_unpack
 813 #endif
 814 int run_get_highest_vcn(CLST vcn, const u8 *run_buf, u64 *highest_vcn);
 815 int run_clone(const struct runs_tree *run, struct runs_tree *new_run);
 816
 817 /* Globals from super.c */
 818 void *ntfs_set_shared(void *ptr, u32 bytes);
 819 void *ntfs_put_shared(void *ptr);
 820 void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len);
 821 int ntfs_discard(struct ntfs_sb_info *sbi, CLST Lcn, CLST Len);
 822
 823 /* Globals from bitmap.c*/
 824 int __init ntfs3_init_bitmap(void);
 825 void ntfs3_exit_bitmap(void);
 826 void wnd_close(struct wnd_bitmap *wnd);
 827 static inline size_t wnd_zeroes(const struct wnd_bitmap *wnd)
 828 {
 829         return wnd->total_zeroes;
 830 }
 831 int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits);
 832 int wnd_set_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
 833 int wnd_set_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
 834 int wnd_set_used_safe(struct wnd_bitmap *wnd, size_t bit, size_t bits,
 835                       size_t *done);
 836 bool wnd_is_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
 837 bool wnd_is_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
 838
 839 /* Possible values for 'flags' 'wnd_find'. */
 840 #define BITMAP_FIND_MARK_AS_USED 0x01
 841 #define BITMAP_FIND_FULL 0x02
 842 size_t wnd_find(struct wnd_bitmap *wnd, size_t to_alloc, size_t hint,
 843                 size_t flags, size_t *allocated);
 844 int wnd_extend(struct wnd_bitmap *wnd, size_t new_bits);
 845 void wnd_zone_set(struct wnd_bitmap *wnd, size_t Lcn, size_t Len);
 846 int ntfs_trim_fs(struct ntfs_sb_info *sbi, struct fstrim_range *range);
 847
 848 void ntfs_bitmap_set_le(void *map, unsigned int start, int len);
 849 void ntfs_bitmap_clear_le(void *map, unsigned int start, int len);
 850 unsigned int ntfs_bitmap_weight_le(const void *bitmap, int bits);
 851
 852 /* Globals from upcase.c */
 853 int ntfs_cmp_names(const __le16 *s1, size_t l1, const __le16 *s2, size_t l2,
 854                    const u16 *upcase, bool bothcase);
 855 int ntfs_cmp_names_cpu(const struct cpu_str *uni1, const struct le_str *uni2,
 856                        const u16 *upcase, bool bothcase);
 857 unsigned long ntfs_names_hash(const u16 *name, size_t len, const u16 *upcase,
 858                               unsigned long hash);
 859
 860 /* globals from xattr.c */
 861 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
 862 struct posix_acl *ntfs_get_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 863                                int type);
 864 int ntfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 865                  struct posix_acl *acl, int type);
 866 int ntfs_init_acl(struct mnt_idmap *idmap, struct inode *inode,
 867                   struct inode *dir);
 868 #else
 869 #define ntfs_get_acl NULL
 870 #define ntfs_set_acl NULL
 871 #endif
 872
 873 int ntfs_acl_chmod(struct mnt_idmap *idmap, struct dentry *dentry);
 874 ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 875 extern const struct xattr_handler *ntfs_xattr_handlers[];
 876
 877 int ntfs_save_wsl_perm(struct inode *inode, __le16 *ea_size);
 878 void ntfs_get_wsl_perm(struct inode *inode);
 879
 880 /* globals from lznt.c */
 881 struct lznt *get_lznt_ctx(int level);
 882 size_t compress_lznt(const void *uncompressed, size_t uncompressed_size,
 883                      void *compressed, size_t compressed_size,
 884                      struct lznt *ctx);
 885 ssize_t decompress_lznt(const void *compressed, size_t compressed_size,
 886                         void *uncompressed, size_t uncompressed_size);
 887
 888 static inline bool is_ntfs3(struct ntfs_sb_info *sbi)
 889 {
 890         return sbi->volume.major_ver >= 3;
 891 }
 892
 893 /* (sb->s_flags & SB_ACTIVE) */
 894 static inline bool is_mounted(struct ntfs_sb_info *sbi)
 895 {
 896         return !!sbi->sb->s_root;
 897 }
 898
 899 static inline bool ntfs_is_meta_file(struct ntfs_sb_info *sbi, CLST rno)
 900 {
 901         return rno < MFT_REC_FREE || rno == sbi->objid_no ||
 902                rno == sbi->quota_no || rno == sbi->reparse_no ||
 903                rno == sbi->usn_jrnl_no;
 904 }
 905
 906 static inline void ntfs_unmap_page(struct page *page)
 907 {
 908         kunmap(page);
 909         put_page(page);
 910 }
 911
 912 static inline struct page *ntfs_map_page(struct address_space *mapping,
 913                                          unsigned long index)
 914 {
 915         struct page *page = read_mapping_page(mapping, index, NULL);
 916
 917         if (!IS_ERR(page))
 918                 kmap(page);
 919         return page;
 920 }
 921
 922 static inline size_t wnd_zone_bit(const struct wnd_bitmap *wnd)
 923 {
 924         return wnd->zone_bit;
 925 }
 926
 927 static inline size_t wnd_zone_len(const struct wnd_bitmap *wnd)
 928 {
 929         return wnd->zone_end - wnd->zone_bit;
 930 }
 931
 932 static inline void run_init(struct runs_tree *run)
 933 {
 934         run->runs = NULL;
 935         run->count = 0;
 936         run->allocated = 0;
 937 }
 938
 939 static inline struct runs_tree *run_alloc(void)
 940 {
 941         return kzalloc(sizeof(struct runs_tree), GFP_NOFS);
 942 }
 943
 944 static inline void run_close(struct runs_tree *run)
 945 {
 946         kvfree(run->runs);
 947         memset(run, 0, sizeof(*run));
 948 }
 949
 950 static inline void run_free(struct runs_tree *run)
 951 {
 952         if (run) {
 953                 kvfree(run->runs);
 954                 kfree(run);
 955         }
 956 }
 957
 958 static inline bool run_is_empty(struct runs_tree *run)
 959 {
 960         return !run->count;
 961 }
 962
 963 /* NTFS uses quad aligned bitmaps. */
 964 static inline size_t bitmap_size(size_t bits)
 965 {
 966         return ALIGN((bits + 7) >> 3, 8);
 967 }
 968
 969 #define _100ns2seconds 10000000
 970 #define SecondsToStartOf1970 0x00000002B6109100
 971
 972 #define NTFS_TIME_GRAN 100
 973
 974 /*
 975  * kernel2nt - Converts in-memory kernel timestamp into nt time.
 976  */
 977 static inline __le64 kernel2nt(const struct timespec64 *ts)
 978 {
 979         // 10^7 units of 100 nanoseconds one second
 980         return cpu_to_le64(_100ns2seconds *
 981                                    (ts->tv_sec + SecondsToStartOf1970) +
 982                            ts->tv_nsec / NTFS_TIME_GRAN);
 983 }
 984
 985 /*
 986  * nt2kernel - Converts on-disk nt time into kernel timestamp.
 987  */
 988 static inline void nt2kernel(const __le64 tm, struct timespec64 *ts)
 989 {
 990         u64 t = le64_to_cpu(tm) - _100ns2seconds * SecondsToStartOf1970;
 991
 992         // WARNING: do_div changes its first argument(!)
 993         ts->tv_nsec = do_div(t, _100ns2seconds) * 100;
 994         ts->tv_sec = t;
 995 }
 996
 997 static inline struct ntfs_sb_info *ntfs_sb(struct super_block *sb)
 998 {
 999         return sb->s_fs_info;
1000 }
1001
1002 /*
1003  * ntfs_up_cluster - Align up on cluster boundary.
1004  */
1005 static inline u64 ntfs_up_cluster(const struct ntfs_sb_info *sbi, u64 size)
1006 {
1007         return (size + sbi->cluster_mask) & sbi->cluster_mask_inv;
1008 }
1009
1010 /*
1011  * ntfs_up_block - Align up on cluster boundary.
1012  */
1013 static inline u64 ntfs_up_block(const struct super_block *sb, u64 size)
1014 {
1015         return (size + sb->s_blocksize - 1) & ~(u64)(sb->s_blocksize - 1);
1016 }
1017
1018 static inline CLST bytes_to_cluster(const struct ntfs_sb_info *sbi, u64 size)
1019 {
1020         return (size + sbi->cluster_mask) >> sbi->cluster_bits;
1021 }
1022
1023 static inline u64 bytes_to_block(const struct super_block *sb, u64 size)
1024 {
1025         return (size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1026 }
1027
1028 static inline struct buffer_head *ntfs_bread(struct super_block *sb,
1029                                              sector_t block)
1030 {
1031         struct buffer_head *bh = sb_bread(sb, block);
1032
1033         if (bh)
1034                 return bh;
1035
1036         ntfs_err(sb, "failed to read volume at offset 0x%llx",
1037                  (u64)block << sb->s_blocksize_bits);
1038         return NULL;
1039 }
1040
1041 static inline struct ntfs_inode *ntfs_i(struct inode *inode)
1042 {
1043         return container_of(inode, struct ntfs_inode, vfs_inode);
1044 }
1045
1046 static inline bool is_compressed(const struct ntfs_inode *ni)
1047 {
1048         return (ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) ||
1049                (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
1050 }
1051
1052 static inline int ni_ext_compress_bits(const struct ntfs_inode *ni)
1053 {
1054         return 0xb + (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
1055 }
1056
1057 /* Bits - 0xc, 0xd, 0xe, 0xf, 0x10 */
1058 static inline void ni_set_ext_compress_bits(struct ntfs_inode *ni, u8 bits)
1059 {
1060         ni->ni_flags |= (bits - 0xb) & NI_FLAG_COMPRESSED_MASK;
1061 }
1062
1063 static inline bool is_dedup(const struct ntfs_inode *ni)
1064 {
1065         return ni->ni_flags & NI_FLAG_DEDUPLICATED;
1066 }
1067
1068 static inline bool is_encrypted(const struct ntfs_inode *ni)
1069 {
1070         return ni->std_fa & FILE_ATTRIBUTE_ENCRYPTED;
1071 }
1072
1073 static inline bool is_sparsed(const struct ntfs_inode *ni)
1074 {
1075         return ni->std_fa & FILE_ATTRIBUTE_SPARSE_FILE;
1076 }
1077
1078 static inline int is_resident(struct ntfs_inode *ni)
1079 {
1080         return ni->ni_flags & NI_FLAG_RESIDENT;
1081 }
1082
1083 static inline void le16_sub_cpu(__le16 *var, u16 val)
1084 {
1085         *var = cpu_to_le16(le16_to_cpu(*var) - val);
1086 }
1087
1088 static inline void le32_sub_cpu(__le32 *var, u32 val)
1089 {
1090         *var = cpu_to_le32(le32_to_cpu(*var) - val);
1091 }
1092
1093 static inline void nb_put(struct ntfs_buffers *nb)
1094 {
1095         u32 i, nbufs = nb->nbufs;
1096
1097         if (!nbufs)
1098                 return;
1099
1100         for (i = 0; i < nbufs; i++)
1101                 put_bh(nb->bh[i]);
1102         nb->nbufs = 0;
1103 }
1104
1105 static inline void put_indx_node(struct indx_node *in)
1106 {
1107         if (!in)
1108                 return;
1109
1110         kfree(in->index);
1111         nb_put(&in->nb);
1112         kfree(in);
1113 }
1114
1115 static inline void mi_clear(struct mft_inode *mi)
1116 {
1117         nb_put(&mi->nb);
1118         kfree(mi->mrec);
1119         mi->mrec = NULL;
1120 }
1121
1122 static inline void ni_lock(struct ntfs_inode *ni)
1123 {
1124         mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_NORMAL);
1125 }
1126
1127 static inline void ni_lock_dir(struct ntfs_inode *ni)
1128 {
1129         mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_PARENT);
1130 }
1131
1132 static inline void ni_lock_dir2(struct ntfs_inode *ni)
1133 {
1134         mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_PARENT2);
1135 }
1136
1137 static inline void ni_unlock(struct ntfs_inode *ni)
1138 {
1139         mutex_unlock(&ni->ni_lock);
1140 }
1141
1142 static inline int ni_trylock(struct ntfs_inode *ni)
1143 {
1144         return mutex_trylock(&ni->ni_lock);
1145 }
1146
1147 static inline int attr_load_runs_attr(struct ntfs_inode *ni,
1148                                       struct ATTRIB *attr,
1149                                       struct runs_tree *run, CLST vcn)
1150 {
1151         return attr_load_runs_vcn(ni, attr->type, attr_name(attr),
1152                                   attr->name_len, run, vcn);
1153 }
1154
1155 static inline void le64_sub_cpu(__le64 *var, u64 val)
1156 {
1157         *var = cpu_to_le64(le64_to_cpu(*var) - val);
1158 }
1159
1160 #endif /* _LINUX_NTFS3_NTFS_FS_H */