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linux-next/fs/ntfs3/ntfs.h
Konstantin Komarov 56eaeb10e2
fs/ntfs3: Change max hardlinks limit to 4000 
xfstest generic/041 works with 3003 hardlinks.
Because of this we raise hardlinks limit to 4000.
There are no drawbacks or regressions.
Theoretically we can raise all the way up to ffff,
but there is no practical use for this.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
2021-09-21 18:37:01 +03:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
*
* Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
*
* on-disk ntfs structs
*/
// clang-format off
#ifndef _LINUX_NTFS3_NTFS_H
#define _LINUX_NTFS3_NTFS_H
#include <linux/blkdev.h>
#include <linux/build_bug.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/types.h>
#include "debug.h"
/* TODO: Check 4K MFT record and 512 bytes cluster. */
/* Check each run for marked clusters. */
#define NTFS3_CHECK_FREE_CLST
#define NTFS_NAME_LEN 255
/*
* ntfs.sys used 500 maximum links on-disk struct allows up to 0xffff.
* xfstest generic/041 creates 3003 hardlinks.
*/
#define NTFS_LINK_MAX 4000
/*
* Activate to use 64 bit clusters instead of 32 bits in ntfs.sys.
* Logical and virtual cluster number if needed, may be
* redefined to use 64 bit value.
*/
//#define CONFIG_NTFS3_64BIT_CLUSTER
#define NTFS_LZNT_MAX_CLUSTER 4096
#define NTFS_LZNT_CUNIT 4
#define NTFS_LZNT_CLUSTERS (1u<<NTFS_LZNT_CUNIT)
struct GUID {
__le32 Data1;
__le16 Data2;
__le16 Data3;
u8 Data4[8];
};
/*
* This struct repeats layout of ATTR_FILE_NAME
* at offset 0x40.
* It used to store global constants NAME_MFT/NAME_MIRROR...
* most constant names are shorter than 10.
*/
struct cpu_str {
u8 len;
u8 unused;
u16 name[10];
};
struct le_str {
u8 len;
u8 unused;
__le16 name[];
};
static_assert(SECTOR_SHIFT == 9);
#ifdef CONFIG_NTFS3_64BIT_CLUSTER
typedef u64 CLST;
static_assert(sizeof(size_t) == 8);
#else
typedef u32 CLST;
#endif
#define SPARSE_LCN64 ((u64)-1)
#define SPARSE_LCN ((CLST)-1)
#define RESIDENT_LCN ((CLST)-2)
#define COMPRESSED_LCN ((CLST)-3)
#define COMPRESSION_UNIT 4
#define COMPRESS_MAX_CLUSTER 0x1000
#define MFT_INCREASE_CHUNK 1024
enum RECORD_NUM {
MFT_REC_MFT = 0,
MFT_REC_MIRR = 1,
MFT_REC_LOG = 2,
MFT_REC_VOL = 3,
MFT_REC_ATTR = 4,
MFT_REC_ROOT = 5,
MFT_REC_BITMAP = 6,
MFT_REC_BOOT = 7,
MFT_REC_BADCLUST = 8,
//MFT_REC_QUOTA = 9,
MFT_REC_SECURE = 9, // NTFS 3.0
MFT_REC_UPCASE = 10,
MFT_REC_EXTEND = 11, // NTFS 3.0
MFT_REC_RESERVED = 11,
MFT_REC_FREE = 16,
MFT_REC_USER = 24,
};
enum ATTR_TYPE {
ATTR_ZERO = cpu_to_le32(0x00),
ATTR_STD = cpu_to_le32(0x10),
ATTR_LIST = cpu_to_le32(0x20),
ATTR_NAME = cpu_to_le32(0x30),
// ATTR_VOLUME_VERSION on Nt4
ATTR_ID = cpu_to_le32(0x40),
ATTR_SECURE = cpu_to_le32(0x50),
ATTR_LABEL = cpu_to_le32(0x60),
ATTR_VOL_INFO = cpu_to_le32(0x70),
ATTR_DATA = cpu_to_le32(0x80),
ATTR_ROOT = cpu_to_le32(0x90),
ATTR_ALLOC = cpu_to_le32(0xA0),
ATTR_BITMAP = cpu_to_le32(0xB0),
// ATTR_SYMLINK on Nt4
ATTR_REPARSE = cpu_to_le32(0xC0),
ATTR_EA_INFO = cpu_to_le32(0xD0),
ATTR_EA = cpu_to_le32(0xE0),
ATTR_PROPERTYSET = cpu_to_le32(0xF0),
ATTR_LOGGED_UTILITY_STREAM = cpu_to_le32(0x100),
ATTR_END = cpu_to_le32(0xFFFFFFFF)
};
static_assert(sizeof(enum ATTR_TYPE) == 4);
enum FILE_ATTRIBUTE {
FILE_ATTRIBUTE_READONLY = cpu_to_le32(0x00000001),
FILE_ATTRIBUTE_HIDDEN = cpu_to_le32(0x00000002),
FILE_ATTRIBUTE_SYSTEM = cpu_to_le32(0x00000004),
FILE_ATTRIBUTE_ARCHIVE = cpu_to_le32(0x00000020),
FILE_ATTRIBUTE_DEVICE = cpu_to_le32(0x00000040),
FILE_ATTRIBUTE_TEMPORARY = cpu_to_le32(0x00000100),
FILE_ATTRIBUTE_SPARSE_FILE = cpu_to_le32(0x00000200),
FILE_ATTRIBUTE_REPARSE_POINT = cpu_to_le32(0x00000400),
FILE_ATTRIBUTE_COMPRESSED = cpu_to_le32(0x00000800),
FILE_ATTRIBUTE_OFFLINE = cpu_to_le32(0x00001000),
FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = cpu_to_le32(0x00002000),
FILE_ATTRIBUTE_ENCRYPTED = cpu_to_le32(0x00004000),
FILE_ATTRIBUTE_VALID_FLAGS = cpu_to_le32(0x00007fb7),
FILE_ATTRIBUTE_DIRECTORY = cpu_to_le32(0x10000000),
};
static_assert(sizeof(enum FILE_ATTRIBUTE) == 4);
extern const struct cpu_str NAME_MFT;
extern const struct cpu_str NAME_MIRROR;
extern const struct cpu_str NAME_LOGFILE;
extern const struct cpu_str NAME_VOLUME;
extern const struct cpu_str NAME_ATTRDEF;
extern const struct cpu_str NAME_ROOT;
extern const struct cpu_str NAME_BITMAP;
extern const struct cpu_str NAME_BOOT;
extern const struct cpu_str NAME_BADCLUS;
extern const struct cpu_str NAME_QUOTA;
extern const struct cpu_str NAME_SECURE;
extern const struct cpu_str NAME_UPCASE;
extern const struct cpu_str NAME_EXTEND;
extern const struct cpu_str NAME_OBJID;
extern const struct cpu_str NAME_REPARSE;
extern const struct cpu_str NAME_USNJRNL;
extern const __le16 I30_NAME[4];
extern const __le16 SII_NAME[4];
extern const __le16 SDH_NAME[4];
extern const __le16 SO_NAME[2];
extern const __le16 SQ_NAME[2];
extern const __le16 SR_NAME[2];
extern const __le16 BAD_NAME[4];
extern const __le16 SDS_NAME[4];
extern const __le16 WOF_NAME[17]; /* WofCompressedData */
/* MFT record number structure. */
struct MFT_REF {
__le32 low; // The low part of the number.
__le16 high; // The high part of the number.
__le16 seq; // The sequence number of MFT record.
};
static_assert(sizeof(__le64) == sizeof(struct MFT_REF));
static inline CLST ino_get(const struct MFT_REF *ref)
{
#ifdef CONFIG_NTFS3_64BIT_CLUSTER
return le32_to_cpu(ref->low) | ((u64)le16_to_cpu(ref->high) << 32);
#else
return le32_to_cpu(ref->low);
#endif
}
struct NTFS_BOOT {
u8 jump_code[3]; // 0x00: Jump to boot code.
u8 system_id[8]; // 0x03: System ID, equals "NTFS "
// NOTE: This member is not aligned(!)
// bytes_per_sector[0] must be 0.
// bytes_per_sector[1] must be multiplied by 256.
u8 bytes_per_sector[2]; // 0x0B: Bytes per sector.
u8 sectors_per_clusters;// 0x0D: Sectors per cluster.
u8 unused1[7];
u8 media_type; // 0x15: Media type (0xF8 - harddisk)
u8 unused2[2];
__le16 sct_per_track; // 0x18: number of sectors per track.
__le16 heads; // 0x1A: number of heads per cylinder.
__le32 hidden_sectors; // 0x1C: number of 'hidden' sectors.
u8 unused3[4];
u8 bios_drive_num; // 0x24: BIOS drive number =0x80.
u8 unused4;
u8 signature_ex; // 0x26: Extended BOOT signature =0x80.
u8 unused5;
__le64 sectors_per_volume;// 0x28: Size of volume in sectors.
__le64 mft_clst; // 0x30: First cluster of $MFT
__le64 mft2_clst; // 0x38: First cluster of $MFTMirr
s8 record_size; // 0x40: Size of MFT record in clusters(sectors).
u8 unused6[3];
s8 index_size; // 0x44: Size of INDX record in clusters(sectors).
u8 unused7[3];
__le64 serial_num; // 0x48: Volume serial number
__le32 check_sum; // 0x50: Simple additive checksum of all
// of the u32's which precede the 'check_sum'.
u8 boot_code[0x200 - 0x50 - 2 - 4]; // 0x54:
u8 boot_magic[2]; // 0x1FE: Boot signature =0x55 + 0xAA
};
static_assert(sizeof(struct NTFS_BOOT) == 0x200);
enum NTFS_SIGNATURE {
NTFS_FILE_SIGNATURE = cpu_to_le32(0x454C4946), // 'FILE'
NTFS_INDX_SIGNATURE = cpu_to_le32(0x58444E49), // 'INDX'
NTFS_CHKD_SIGNATURE = cpu_to_le32(0x444B4843), // 'CHKD'
NTFS_RSTR_SIGNATURE = cpu_to_le32(0x52545352), // 'RSTR'
NTFS_RCRD_SIGNATURE = cpu_to_le32(0x44524352), // 'RCRD'
NTFS_BAAD_SIGNATURE = cpu_to_le32(0x44414142), // 'BAAD'
NTFS_HOLE_SIGNATURE = cpu_to_le32(0x454C4F48), // 'HOLE'
NTFS_FFFF_SIGNATURE = cpu_to_le32(0xffffffff),
};
static_assert(sizeof(enum NTFS_SIGNATURE) == 4);
/* MFT Record header structure. */
struct NTFS_RECORD_HEADER {
/* Record magic number, equals 'FILE'/'INDX'/'RSTR'/'RCRD'. */
enum NTFS_SIGNATURE sign; // 0x00:
__le16 fix_off; // 0x04:
__le16 fix_num; // 0x06:
__le64 lsn; // 0x08: Log file sequence number,
};
static_assert(sizeof(struct NTFS_RECORD_HEADER) == 0x10);
static inline int is_baad(const struct NTFS_RECORD_HEADER *hdr)
{
return hdr->sign == NTFS_BAAD_SIGNATURE;
}
/* Possible bits in struct MFT_REC.flags. */
enum RECORD_FLAG {
RECORD_FLAG_IN_USE = cpu_to_le16(0x0001),
RECORD_FLAG_DIR = cpu_to_le16(0x0002),
RECORD_FLAG_SYSTEM = cpu_to_le16(0x0004),
RECORD_FLAG_UNKNOWN = cpu_to_le16(0x0008),
};
/* MFT Record structure. */
struct MFT_REC {
struct NTFS_RECORD_HEADER rhdr; // 'FILE'
__le16 seq; // 0x10: Sequence number for this record.
__le16 hard_links; // 0x12: The number of hard links to record.
__le16 attr_off; // 0x14: Offset to attributes.
__le16 flags; // 0x16: See RECORD_FLAG.
__le32 used; // 0x18: The size of used part.
__le32 total; // 0x1C: Total record size.
struct MFT_REF parent_ref; // 0x20: Parent MFT record.
__le16 next_attr_id; // 0x28: The next attribute Id.
__le16 res; // 0x2A: High part of MFT record?
__le32 mft_record; // 0x2C: Current MFT record number.
__le16 fixups[]; // 0x30:
};
#define MFTRECORD_FIXUP_OFFSET_1 offsetof(struct MFT_REC, res)
#define MFTRECORD_FIXUP_OFFSET_3 offsetof(struct MFT_REC, fixups)
static_assert(MFTRECORD_FIXUP_OFFSET_1 == 0x2A);
static_assert(MFTRECORD_FIXUP_OFFSET_3 == 0x30);
static inline bool is_rec_base(const struct MFT_REC *rec)
{
const struct MFT_REF *r = &rec->parent_ref;
return !r->low && !r->high && !r->seq;
}
static inline bool is_mft_rec5(const struct MFT_REC *rec)
{
return le16_to_cpu(rec->rhdr.fix_off) >=
offsetof(struct MFT_REC, fixups);
}
static inline bool is_rec_inuse(const struct MFT_REC *rec)
{
return rec->flags & RECORD_FLAG_IN_USE;
}
static inline bool clear_rec_inuse(struct MFT_REC *rec)
{
return rec->flags &= ~RECORD_FLAG_IN_USE;
}
/* Possible values of ATTR_RESIDENT.flags */
#define RESIDENT_FLAG_INDEXED 0x01
struct ATTR_RESIDENT {
__le32 data_size; // 0x10: The size of data.
__le16 data_off; // 0x14: Offset to data.
u8 flags; // 0x16: Resident flags ( 1 - indexed ).
u8 res; // 0x17:
}; // sizeof() = 0x18
struct ATTR_NONRESIDENT {
__le64 svcn; // 0x10: Starting VCN of this segment.
__le64 evcn; // 0x18: End VCN of this segment.
__le16 run_off; // 0x20: Offset to packed runs.
// Unit of Compression size for this stream, expressed
// as a log of the cluster size.
//
// 0 means file is not compressed
// 1, 2, 3, and 4 are potentially legal values if the
// stream is compressed, however the implementation
// may only choose to use 4, or possibly 3. Note
// that 4 means cluster size time 16. If convenient
// the implementation may wish to accept a
// reasonable range of legal values here (1-5?),
// even if the implementation only generates
// a smaller set of values itself.
u8 c_unit; // 0x22:
u8 res1[5]; // 0x23:
__le64 alloc_size; // 0x28: The allocated size of attribute in bytes.
// (multiple of cluster size)
__le64 data_size; // 0x30: The size of attribute in bytes <= alloc_size.
__le64 valid_size; // 0x38: The size of valid part in bytes <= data_size.
__le64 total_size; // 0x40: The sum of the allocated clusters for a file.
// (present only for the first segment (0 == vcn)
// of compressed attribute)
}; // sizeof()=0x40 or 0x48 (if compressed)
/* Possible values of ATTRIB.flags: */
#define ATTR_FLAG_COMPRESSED cpu_to_le16(0x0001)
#define ATTR_FLAG_COMPRESSED_MASK cpu_to_le16(0x00FF)
#define ATTR_FLAG_ENCRYPTED cpu_to_le16(0x4000)
#define ATTR_FLAG_SPARSED cpu_to_le16(0x8000)
struct ATTRIB {
enum ATTR_TYPE type; // 0x00: The type of this attribute.
__le32 size; // 0x04: The size of this attribute.
u8 non_res; // 0x08: Is this attribute non-resident?
u8 name_len; // 0x09: This attribute name length.
__le16 name_off; // 0x0A: Offset to the attribute name.
__le16 flags; // 0x0C: See ATTR_FLAG_XXX.
__le16 id; // 0x0E: Unique id (per record).
union {
struct ATTR_RESIDENT res; // 0x10
struct ATTR_NONRESIDENT nres; // 0x10
};
};
/* Define attribute sizes. */
#define SIZEOF_RESIDENT 0x18
#define SIZEOF_NONRESIDENT_EX 0x48
#define SIZEOF_NONRESIDENT 0x40
#define SIZEOF_RESIDENT_LE cpu_to_le16(0x18)
#define SIZEOF_NONRESIDENT_EX_LE cpu_to_le16(0x48)
#define SIZEOF_NONRESIDENT_LE cpu_to_le16(0x40)
static inline u64 attr_ondisk_size(const struct ATTRIB *attr)
{
return attr->non_res ? ((attr->flags &
(ATTR_FLAG_COMPRESSED | ATTR_FLAG_SPARSED)) ?
le64_to_cpu(attr->nres.total_size) :
le64_to_cpu(attr->nres.alloc_size))
: ALIGN(le32_to_cpu(attr->res.data_size), 8);
}
static inline u64 attr_size(const struct ATTRIB *attr)
{
return attr->non_res ? le64_to_cpu(attr->nres.data_size) :
le32_to_cpu(attr->res.data_size);
}
static inline bool is_attr_encrypted(const struct ATTRIB *attr)
{
return attr->flags & ATTR_FLAG_ENCRYPTED;
}
static inline bool is_attr_sparsed(const struct ATTRIB *attr)
{
return attr->flags & ATTR_FLAG_SPARSED;
}
static inline bool is_attr_compressed(const struct ATTRIB *attr)
{
return attr->flags & ATTR_FLAG_COMPRESSED;
}
static inline bool is_attr_ext(const struct ATTRIB *attr)
{
return attr->flags & (ATTR_FLAG_SPARSED | ATTR_FLAG_COMPRESSED);
}
static inline bool is_attr_indexed(const struct ATTRIB *attr)
{
return !attr->non_res && (attr->res.flags & RESIDENT_FLAG_INDEXED);
}
static inline __le16 const *attr_name(const struct ATTRIB *attr)
{
return Add2Ptr(attr, le16_to_cpu(attr->name_off));
}
static inline u64 attr_svcn(const struct ATTRIB *attr)
{
return attr->non_res ? le64_to_cpu(attr->nres.svcn) : 0;
}
/* The size of resident attribute by its resident size. */
#define BYTES_PER_RESIDENT(b) (0x18 + (b))
static_assert(sizeof(struct ATTRIB) == 0x48);
static_assert(sizeof(((struct ATTRIB *)NULL)->res) == 0x08);
static_assert(sizeof(((struct ATTRIB *)NULL)->nres) == 0x38);
static inline void *resident_data_ex(const struct ATTRIB *attr, u32 datasize)
{
u32 asize, rsize;
u16 off;
if (attr->non_res)
return NULL;
asize = le32_to_cpu(attr->size);
off = le16_to_cpu(attr->res.data_off);
if (asize < datasize + off)
return NULL;
rsize = le32_to_cpu(attr->res.data_size);
if (rsize < datasize)
return NULL;
return Add2Ptr(attr, off);
}
static inline void *resident_data(const struct ATTRIB *attr)
{
return Add2Ptr(attr, le16_to_cpu(attr->res.data_off));
}
static inline void *attr_run(const struct ATTRIB *attr)
{
return Add2Ptr(attr, le16_to_cpu(attr->nres.run_off));
}
/* Standard information attribute (0x10). */
struct ATTR_STD_INFO {
__le64 cr_time; // 0x00: File creation file.
__le64 m_time; // 0x08: File modification time.
__le64 c_time; // 0x10: Last time any attribute was modified.
__le64 a_time; // 0x18: File last access time.
enum FILE_ATTRIBUTE fa; // 0x20: Standard DOS attributes & more.
__le32 max_ver_num; // 0x24: Maximum Number of Versions.
__le32 ver_num; // 0x28: Version Number.
__le32 class_id; // 0x2C: Class Id from bidirectional Class Id index.
};
static_assert(sizeof(struct ATTR_STD_INFO) == 0x30);
#define SECURITY_ID_INVALID 0x00000000
#define SECURITY_ID_FIRST 0x00000100
struct ATTR_STD_INFO5 {
__le64 cr_time; // 0x00: File creation file.
__le64 m_time; // 0x08: File modification time.
__le64 c_time; // 0x10: Last time any attribute was modified.
__le64 a_time; // 0x18: File last access time.
enum FILE_ATTRIBUTE fa; // 0x20: Standard DOS attributes & more.
__le32 max_ver_num; // 0x24: Maximum Number of Versions.
__le32 ver_num; // 0x28: Version Number.
__le32 class_id; // 0x2C: Class Id from bidirectional Class Id index.
__le32 owner_id; // 0x30: Owner Id of the user owning the file.
__le32 security_id; // 0x34: The Security Id is a key in the $SII Index and $SDS.
__le64 quota_charge; // 0x38:
__le64 usn; // 0x40: Last Update Sequence Number of the file. This is a direct
// index into the file $UsnJrnl. If zero, the USN Journal is
// disabled.
};
static_assert(sizeof(struct ATTR_STD_INFO5) == 0x48);
/* Attribute list entry structure (0x20) */
struct ATTR_LIST_ENTRY {
enum ATTR_TYPE type; // 0x00: The type of attribute.
__le16 size; // 0x04: The size of this record.
u8 name_len; // 0x06: The length of attribute name.
u8 name_off; // 0x07: The offset to attribute name.
__le64 vcn; // 0x08: Starting VCN of this attribute.
struct MFT_REF ref; // 0x10: MFT record number with attribute.
__le16 id; // 0x18: struct ATTRIB ID.
__le16 name[3]; // 0x1A: Just to align. To get real name can use bNameOffset.
}; // sizeof(0x20)
static_assert(sizeof(struct ATTR_LIST_ENTRY) == 0x20);
static inline u32 le_size(u8 name_len)
{
return ALIGN(offsetof(struct ATTR_LIST_ENTRY, name) +
name_len * sizeof(short), 8);
}
/* Returns 0 if 'attr' has the same type and name. */
static inline int le_cmp(const struct ATTR_LIST_ENTRY *le,
const struct ATTRIB *attr)
{
return le->type != attr->type || le->name_len != attr->name_len ||
(!le->name_len &&
memcmp(Add2Ptr(le, le->name_off),
Add2Ptr(attr, le16_to_cpu(attr->name_off)),
le->name_len * sizeof(short)));
}
static inline __le16 const *le_name(const struct ATTR_LIST_ENTRY *le)
{
return Add2Ptr(le, le->name_off);
}
/* File name types (the field type in struct ATTR_FILE_NAME). */
#define FILE_NAME_POSIX 0
#define FILE_NAME_UNICODE 1
#define FILE_NAME_DOS 2
#define FILE_NAME_UNICODE_AND_DOS (FILE_NAME_DOS | FILE_NAME_UNICODE)
/* Filename attribute structure (0x30). */
struct NTFS_DUP_INFO {
__le64 cr_time; // 0x00: File creation file.
__le64 m_time; // 0x08: File modification time.
__le64 c_time; // 0x10: Last time any attribute was modified.
__le64 a_time; // 0x18: File last access time.
__le64 alloc_size; // 0x20: Data attribute allocated size, multiple of cluster size.
__le64 data_size; // 0x28: Data attribute size <= Dataalloc_size.
enum FILE_ATTRIBUTE fa; // 0x30: Standard DOS attributes & more.
__le16 ea_size; // 0x34: Packed EAs.
__le16 reparse; // 0x36: Used by Reparse.
}; // 0x38
struct ATTR_FILE_NAME {
struct MFT_REF home; // 0x00: MFT record for directory.
struct NTFS_DUP_INFO dup;// 0x08:
u8 name_len; // 0x40: File name length in words.
u8 type; // 0x41: File name type.
__le16 name[]; // 0x42: File name.
};
static_assert(sizeof(((struct ATTR_FILE_NAME *)NULL)->dup) == 0x38);
static_assert(offsetof(struct ATTR_FILE_NAME, name) == 0x42);
#define SIZEOF_ATTRIBUTE_FILENAME 0x44
#define SIZEOF_ATTRIBUTE_FILENAME_MAX (0x42 + 255 * 2)
static inline struct ATTRIB *attr_from_name(struct ATTR_FILE_NAME *fname)
{
return (struct ATTRIB *)((char *)fname - SIZEOF_RESIDENT);
}
static inline u16 fname_full_size(const struct ATTR_FILE_NAME *fname)
{
/* Don't return struct_size(fname, name, fname->name_len); */
return offsetof(struct ATTR_FILE_NAME, name) +
fname->name_len * sizeof(short);
}
static inline u8 paired_name(u8 type)
{
if (type == FILE_NAME_UNICODE)
return FILE_NAME_DOS;
if (type == FILE_NAME_DOS)
return FILE_NAME_UNICODE;
return FILE_NAME_POSIX;
}
/* Index entry defines ( the field flags in NtfsDirEntry ). */
#define NTFS_IE_HAS_SUBNODES cpu_to_le16(1)
#define NTFS_IE_LAST cpu_to_le16(2)
/* Directory entry structure. */
struct NTFS_DE {
union {
struct MFT_REF ref; // 0x00: MFT record number with this file.
struct {
__le16 data_off; // 0x00:
__le16 data_size; // 0x02:
__le32 res; // 0x04: Must be 0.
} view;
};
__le16 size; // 0x08: The size of this entry.
__le16 key_size; // 0x0A: The size of File name length in bytes + 0x42.
__le16 flags; // 0x0C: Entry flags: NTFS_IE_XXX.
__le16 res; // 0x0E:
// Here any indexed attribute can be placed.
// One of them is:
// struct ATTR_FILE_NAME AttrFileName;
//
// The last 8 bytes of this structure contains
// the VBN of subnode.
// !!! Note !!!
// This field is presented only if (flags & NTFS_IE_HAS_SUBNODES)
// __le64 vbn;
};
static_assert(sizeof(struct NTFS_DE) == 0x10);
static inline void de_set_vbn_le(struct NTFS_DE *e, __le64 vcn)
{
__le64 *v = Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));
*v = vcn;
}
static inline void de_set_vbn(struct NTFS_DE *e, CLST vcn)
{
__le64 *v = Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));
*v = cpu_to_le64(vcn);
}
static inline __le64 de_get_vbn_le(const struct NTFS_DE *e)
{
return *(__le64 *)Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));
}
static inline CLST de_get_vbn(const struct NTFS_DE *e)
{
__le64 *v = Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));
return le64_to_cpu(*v);
}
static inline struct NTFS_DE *de_get_next(const struct NTFS_DE *e)
{
return Add2Ptr(e, le16_to_cpu(e->size));
}
static inline struct ATTR_FILE_NAME *de_get_fname(const struct NTFS_DE *e)
{
return le16_to_cpu(e->key_size) >= SIZEOF_ATTRIBUTE_FILENAME ?
Add2Ptr(e, sizeof(struct NTFS_DE)) :
NULL;
}
static inline bool de_is_last(const struct NTFS_DE *e)
{
return e->flags & NTFS_IE_LAST;
}
static inline bool de_has_vcn(const struct NTFS_DE *e)
{
return e->flags & NTFS_IE_HAS_SUBNODES;
}
static inline bool de_has_vcn_ex(const struct NTFS_DE *e)
{
return (e->flags & NTFS_IE_HAS_SUBNODES) &&
(u64)(-1) != *((u64 *)Add2Ptr(e, le16_to_cpu(e->size) -
sizeof(__le64)));
}
#define MAX_BYTES_PER_NAME_ENTRY \
ALIGN(sizeof(struct NTFS_DE) + \
offsetof(struct ATTR_FILE_NAME, name) + \
NTFS_NAME_LEN * sizeof(short), 8)
struct INDEX_HDR {
__le32 de_off; // 0x00: The offset from the start of this structure
// to the first NTFS_DE.
__le32 used; // 0x04: The size of this structure plus all
// entries (quad-word aligned).
__le32 total; // 0x08: The allocated size of for this structure plus all entries.
u8 flags; // 0x0C: 0x00 = Small directory, 0x01 = Large directory.
u8 res[3];
//
// de_off + used <= total
//
};
static_assert(sizeof(struct INDEX_HDR) == 0x10);
static inline struct NTFS_DE *hdr_first_de(const struct INDEX_HDR *hdr)
{
u32 de_off = le32_to_cpu(hdr->de_off);
u32 used = le32_to_cpu(hdr->used);
struct NTFS_DE *e = Add2Ptr(hdr, de_off);
u16 esize;
if (de_off >= used || de_off >= le32_to_cpu(hdr->total))
return NULL;
esize = le16_to_cpu(e->size);
if (esize < sizeof(struct NTFS_DE) || de_off + esize > used)
return NULL;
return e;
}
static inline struct NTFS_DE *hdr_next_de(const struct INDEX_HDR *hdr,
const struct NTFS_DE *e)
{
size_t off = PtrOffset(hdr, e);
u32 used = le32_to_cpu(hdr->used);
u16 esize;
if (off >= used)
return NULL;
esize = le16_to_cpu(e->size);
if (esize < sizeof(struct NTFS_DE) ||
off + esize + sizeof(struct NTFS_DE) > used)
return NULL;
return Add2Ptr(e, esize);
}
static inline bool hdr_has_subnode(const struct INDEX_HDR *hdr)
{
return hdr->flags & 1;
}
struct INDEX_BUFFER {
struct NTFS_RECORD_HEADER rhdr; // 'INDX'
__le64 vbn; // 0x10: vcn if index >= cluster or vsn id index < cluster
struct INDEX_HDR ihdr; // 0x18:
};
static_assert(sizeof(struct INDEX_BUFFER) == 0x28);
static inline bool ib_is_empty(const struct INDEX_BUFFER *ib)
{
const struct NTFS_DE *first = hdr_first_de(&ib->ihdr);
return !first || de_is_last(first);
}
static inline bool ib_is_leaf(const struct INDEX_BUFFER *ib)
{
return !(ib->ihdr.flags & 1);
}
/* Index root structure ( 0x90 ). */
enum COLLATION_RULE {
NTFS_COLLATION_TYPE_BINARY = cpu_to_le32(0),
// $I30
NTFS_COLLATION_TYPE_FILENAME = cpu_to_le32(0x01),
// $SII of $Secure and $Q of Quota
NTFS_COLLATION_TYPE_UINT = cpu_to_le32(0x10),
// $O of Quota
NTFS_COLLATION_TYPE_SID = cpu_to_le32(0x11),
// $SDH of $Secure
NTFS_COLLATION_TYPE_SECURITY_HASH = cpu_to_le32(0x12),
// $O of ObjId and "$R" for Reparse
NTFS_COLLATION_TYPE_UINTS = cpu_to_le32(0x13)
};
static_assert(sizeof(enum COLLATION_RULE) == 4);
//
struct INDEX_ROOT {
enum ATTR_TYPE type; // 0x00: The type of attribute to index on.
enum COLLATION_RULE rule; // 0x04: The rule.
__le32 index_block_size;// 0x08: The size of index record.
u8 index_block_clst; // 0x0C: The number of clusters or sectors per index.
u8 res[3];
struct INDEX_HDR ihdr; // 0x10:
};
static_assert(sizeof(struct INDEX_ROOT) == 0x20);
static_assert(offsetof(struct INDEX_ROOT, ihdr) == 0x10);
#define VOLUME_FLAG_DIRTY cpu_to_le16(0x0001)
#define VOLUME_FLAG_RESIZE_LOG_FILE cpu_to_le16(0x0002)
struct VOLUME_INFO {
__le64 res1; // 0x00
u8 major_ver; // 0x08: NTFS major version number (before .)
u8 minor_ver; // 0x09: NTFS minor version number (after .)
__le16 flags; // 0x0A: Volume flags, see VOLUME_FLAG_XXX
}; // sizeof=0xC
#define SIZEOF_ATTRIBUTE_VOLUME_INFO 0xc
#define NTFS_LABEL_MAX_LENGTH (0x100 / sizeof(short))
#define NTFS_ATTR_INDEXABLE cpu_to_le32(0x00000002)
#define NTFS_ATTR_DUPALLOWED cpu_to_le32(0x00000004)
#define NTFS_ATTR_MUST_BE_INDEXED cpu_to_le32(0x00000010)
#define NTFS_ATTR_MUST_BE_NAMED cpu_to_le32(0x00000020)
#define NTFS_ATTR_MUST_BE_RESIDENT cpu_to_le32(0x00000040)
#define NTFS_ATTR_LOG_ALWAYS cpu_to_le32(0x00000080)
/* $AttrDef file entry. */
struct ATTR_DEF_ENTRY {
__le16 name[0x40]; // 0x00: Attr name.
enum ATTR_TYPE type; // 0x80: struct ATTRIB type.
__le32 res; // 0x84:
enum COLLATION_RULE rule; // 0x88:
__le32 flags; // 0x8C: NTFS_ATTR_XXX (see above).
__le64 min_sz; // 0x90: Minimum attribute data size.
__le64 max_sz; // 0x98: Maximum attribute data size.
};
static_assert(sizeof(struct ATTR_DEF_ENTRY) == 0xa0);
/* Object ID (0x40) */
struct OBJECT_ID {
struct GUID ObjId; // 0x00: Unique Id assigned to file.
struct GUID BirthVolumeId; // 0x10: Birth Volume Id is the Object Id of the Volume on.
// which the Object Id was allocated. It never changes.
struct GUID BirthObjectId; // 0x20: Birth Object Id is the first Object Id that was
// ever assigned to this MFT Record. I.e. If the Object Id
// is changed for some reason, this field will reflect the
// original value of the Object Id.
struct GUID DomainId; // 0x30: Domain Id is currently unused but it is intended to be
// used in a network environment where the local machine is
// part of a Windows 2000 Domain. This may be used in a Windows
// 2000 Advanced Server managed domain.
};
static_assert(sizeof(struct OBJECT_ID) == 0x40);
/* O Directory entry structure ( rule = 0x13 ) */
struct NTFS_DE_O {
struct NTFS_DE de;
struct GUID ObjId; // 0x10: Unique Id assigned to file.
struct MFT_REF ref; // 0x20: MFT record number with this file.
struct GUID BirthVolumeId; // 0x28: Birth Volume Id is the Object Id of the Volume on
// which the Object Id was allocated. It never changes.
struct GUID BirthObjectId; // 0x38: Birth Object Id is the first Object Id that was
// ever assigned to this MFT Record. I.e. If the Object Id
// is changed for some reason, this field will reflect the
// original value of the Object Id.
// This field is valid if data_size == 0x48.
struct GUID BirthDomainId; // 0x48: Domain Id is currently unused but it is intended
// to be used in a network environment where the local
// machine is part of a Windows 2000 Domain. This may be
// used in a Windows 2000 Advanced Server managed domain.
};
static_assert(sizeof(struct NTFS_DE_O) == 0x58);
#define NTFS_OBJECT_ENTRY_DATA_SIZE1 \
0x38 // struct NTFS_DE_O.BirthDomainId is not used
#define NTFS_OBJECT_ENTRY_DATA_SIZE2 \
0x48 // struct NTFS_DE_O.BirthDomainId is used
/* Q Directory entry structure ( rule = 0x11 ) */
struct NTFS_DE_Q {
struct NTFS_DE de;
__le32 owner_id; // 0x10: Unique Id assigned to file
__le32 Version; // 0x14: 0x02
__le32 flags2; // 0x18: Quota flags, see above
__le64 BytesUsed; // 0x1C:
__le64 ChangeTime; // 0x24:
__le64 WarningLimit; // 0x28:
__le64 HardLimit; // 0x34:
__le64 ExceededTime; // 0x3C:
// SID is placed here
}; // sizeof() = 0x44
#define SIZEOF_NTFS_DE_Q 0x44
#define SecurityDescriptorsBlockSize 0x40000 // 256K
#define SecurityDescriptorMaxSize 0x20000 // 128K
#define Log2OfSecurityDescriptorsBlockSize 18
struct SECURITY_KEY {
__le32 hash; // Hash value for descriptor
__le32 sec_id; // Security Id (guaranteed unique)
};
/* Security descriptors (the content of $Secure::SDS data stream) */
struct SECURITY_HDR {
struct SECURITY_KEY key; // 0x00: Security Key.
__le64 off; // 0x08: Offset of this entry in the file.
__le32 size; // 0x10: Size of this entry, 8 byte aligned.
/*
* Security descriptor itself is placed here.
* Total size is 16 byte aligned.
*/
} __packed;
#define SIZEOF_SECURITY_HDR 0x14
/* SII Directory entry structure */
struct NTFS_DE_SII {
struct NTFS_DE de;
__le32 sec_id; // 0x10: Key: sizeof(security_id) = wKeySize
struct SECURITY_HDR sec_hdr; // 0x14:
} __packed;
#define SIZEOF_SII_DIRENTRY 0x28
/* SDH Directory entry structure */
struct NTFS_DE_SDH {
struct NTFS_DE de;
struct SECURITY_KEY key; // 0x10: Key
struct SECURITY_HDR sec_hdr; // 0x18: Data
__le16 magic[2]; // 0x2C: 0x00490049 "I I"
};
#define SIZEOF_SDH_DIRENTRY 0x30
struct REPARSE_KEY {
__le32 ReparseTag; // 0x00: Reparse Tag
struct MFT_REF ref; // 0x04: MFT record number with this file
}; // sizeof() = 0x0C
static_assert(offsetof(struct REPARSE_KEY, ref) == 0x04);
#define SIZEOF_REPARSE_KEY 0x0C
/* Reparse Directory entry structure */
struct NTFS_DE_R {
struct NTFS_DE de;
struct REPARSE_KEY key; // 0x10: Reparse Key.
u32 zero; // 0x1c:
}; // sizeof() = 0x20
static_assert(sizeof(struct NTFS_DE_R) == 0x20);
/* CompressReparseBuffer.WofVersion */
#define WOF_CURRENT_VERSION cpu_to_le32(1)
/* CompressReparseBuffer.WofProvider */
#define WOF_PROVIDER_WIM cpu_to_le32(1)
/* CompressReparseBuffer.WofProvider */
#define WOF_PROVIDER_SYSTEM cpu_to_le32(2)
/* CompressReparseBuffer.ProviderVer */
#define WOF_PROVIDER_CURRENT_VERSION cpu_to_le32(1)
#define WOF_COMPRESSION_XPRESS4K cpu_to_le32(0) // 4k
#define WOF_COMPRESSION_LZX32K cpu_to_le32(1) // 32k
#define WOF_COMPRESSION_XPRESS8K cpu_to_le32(2) // 8k
#define WOF_COMPRESSION_XPRESS16K cpu_to_le32(3) // 16k
/*
* ATTR_REPARSE (0xC0)
*
* The reparse struct GUID structure is used by all 3rd party layered drivers to
* store data in a reparse point. For non-Microsoft tags, The struct GUID field
* cannot be GUID_NULL.
* The constraints on reparse tags are defined below.
* Microsoft tags can also be used with this format of the reparse point buffer.
*/
struct REPARSE_POINT {
__le32 ReparseTag; // 0x00:
__le16 ReparseDataLength;// 0x04:
__le16 Reserved;
struct GUID Guid; // 0x08:
//
// Here GenericReparseBuffer is placed
//
};
static_assert(sizeof(struct REPARSE_POINT) == 0x18);
/* Maximum allowed size of the reparse data. */
#define MAXIMUM_REPARSE_DATA_BUFFER_SIZE (16 * 1024)
/*
* The value of the following constant needs to satisfy the following
* conditions:
* (1) Be at least as large as the largest of the reserved tags.
* (2) Be strictly smaller than all the tags in use.
*/
#define IO_REPARSE_TAG_RESERVED_RANGE 1
/*
* The reparse tags are a ULONG. The 32 bits are laid out as follows:
*
* 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* +-+-+-+-+-----------------------+-------------------------------+
* |M|R|N|R| Reserved bits | Reparse Tag Value |
* +-+-+-+-+-----------------------+-------------------------------+
*
* M is the Microsoft bit. When set to 1, it denotes a tag owned by Microsoft.
* All ISVs must use a tag with a 0 in this position.
* Note: If a Microsoft tag is used by non-Microsoft software, the
* behavior is not defined.
*
* R is reserved. Must be zero for non-Microsoft tags.
*
* N is name surrogate. When set to 1, the file represents another named
* entity in the system.
*
* The M and N bits are OR-able.
* The following macros check for the M and N bit values:
*/
/*
* Macro to determine whether a reparse point tag corresponds to a tag
* owned by Microsoft.
*/
#define IsReparseTagMicrosoft(_tag) (((_tag)&IO_REPARSE_TAG_MICROSOFT))
/* Macro to determine whether a reparse point tag is a name surrogate. */
#define IsReparseTagNameSurrogate(_tag) (((_tag)&IO_REPARSE_TAG_NAME_SURROGATE))
/*
* The following constant represents the bits that are valid to use in
* reparse tags.
*/
#define IO_REPARSE_TAG_VALID_VALUES 0xF000FFFF
/*
* Macro to determine whether a reparse tag is a valid tag.
*/
#define IsReparseTagValid(_tag) \
(!((_tag) & ~IO_REPARSE_TAG_VALID_VALUES) && \
((_tag) > IO_REPARSE_TAG_RESERVED_RANGE))
/* Microsoft tags for reparse points. */
enum IO_REPARSE_TAG {
IO_REPARSE_TAG_SYMBOLIC_LINK = cpu_to_le32(0),
IO_REPARSE_TAG_NAME_SURROGATE = cpu_to_le32(0x20000000),
IO_REPARSE_TAG_MICROSOFT = cpu_to_le32(0x80000000),
IO_REPARSE_TAG_MOUNT_POINT = cpu_to_le32(0xA0000003),
IO_REPARSE_TAG_SYMLINK = cpu_to_le32(0xA000000C),
IO_REPARSE_TAG_HSM = cpu_to_le32(0xC0000004),
IO_REPARSE_TAG_SIS = cpu_to_le32(0x80000007),
IO_REPARSE_TAG_DEDUP = cpu_to_le32(0x80000013),
IO_REPARSE_TAG_COMPRESS = cpu_to_le32(0x80000017),
/*
* The reparse tag 0x80000008 is reserved for Microsoft internal use.
* May be published in the future.
*/
/* Microsoft reparse tag reserved for DFS */
IO_REPARSE_TAG_DFS = cpu_to_le32(0x8000000A),
/* Microsoft reparse tag reserved for the file system filter manager. */
IO_REPARSE_TAG_FILTER_MANAGER = cpu_to_le32(0x8000000B),
/* Non-Microsoft tags for reparse points */
/* Tag allocated to CONGRUENT, May 2000. Used by IFSTEST. */
IO_REPARSE_TAG_IFSTEST_CONGRUENT = cpu_to_le32(0x00000009),
/* Tag allocated to ARKIVIO. */
IO_REPARSE_TAG_ARKIVIO = cpu_to_le32(0x0000000C),
/* Tag allocated to SOLUTIONSOFT. */
IO_REPARSE_TAG_SOLUTIONSOFT = cpu_to_le32(0x2000000D),
/* Tag allocated to COMMVAULT. */
IO_REPARSE_TAG_COMMVAULT = cpu_to_le32(0x0000000E),
/* OneDrive?? */
IO_REPARSE_TAG_CLOUD = cpu_to_le32(0x9000001A),
IO_REPARSE_TAG_CLOUD_1 = cpu_to_le32(0x9000101A),
IO_REPARSE_TAG_CLOUD_2 = cpu_to_le32(0x9000201A),
IO_REPARSE_TAG_CLOUD_3 = cpu_to_le32(0x9000301A),
IO_REPARSE_TAG_CLOUD_4 = cpu_to_le32(0x9000401A),
IO_REPARSE_TAG_CLOUD_5 = cpu_to_le32(0x9000501A),
IO_REPARSE_TAG_CLOUD_6 = cpu_to_le32(0x9000601A),
IO_REPARSE_TAG_CLOUD_7 = cpu_to_le32(0x9000701A),
IO_REPARSE_TAG_CLOUD_8 = cpu_to_le32(0x9000801A),
IO_REPARSE_TAG_CLOUD_9 = cpu_to_le32(0x9000901A),
IO_REPARSE_TAG_CLOUD_A = cpu_to_le32(0x9000A01A),
IO_REPARSE_TAG_CLOUD_B = cpu_to_le32(0x9000B01A),
IO_REPARSE_TAG_CLOUD_C = cpu_to_le32(0x9000C01A),
IO_REPARSE_TAG_CLOUD_D = cpu_to_le32(0x9000D01A),
IO_REPARSE_TAG_CLOUD_E = cpu_to_le32(0x9000E01A),
IO_REPARSE_TAG_CLOUD_F = cpu_to_le32(0x9000F01A),
};
#define SYMLINK_FLAG_RELATIVE 1
/* Microsoft reparse buffer. (see DDK for details) */
struct REPARSE_DATA_BUFFER {
__le32 ReparseTag; // 0x00:
__le16 ReparseDataLength; // 0x04:
__le16 Reserved;
union {
/* If ReparseTag == 0xA0000003 (IO_REPARSE_TAG_MOUNT_POINT) */
struct {
__le16 SubstituteNameOffset; // 0x08
__le16 SubstituteNameLength; // 0x0A
__le16 PrintNameOffset; // 0x0C
__le16 PrintNameLength; // 0x0E
__le16 PathBuffer[]; // 0x10
} MountPointReparseBuffer;
/*
* If ReparseTag == 0xA000000C (IO_REPARSE_TAG_SYMLINK)
* https://msdn.microsoft.com/en-us/library/cc232006.aspx
*/
struct {
__le16 SubstituteNameOffset; // 0x08
__le16 SubstituteNameLength; // 0x0A
__le16 PrintNameOffset; // 0x0C
__le16 PrintNameLength; // 0x0E
// 0-absolute path 1- relative path, SYMLINK_FLAG_RELATIVE
__le32 Flags; // 0x10
__le16 PathBuffer[]; // 0x14
} SymbolicLinkReparseBuffer;
/* If ReparseTag == 0x80000017U */
struct {
__le32 WofVersion; // 0x08 == 1
/*
* 1 - WIM backing provider ("WIMBoot"),
* 2 - System compressed file provider
*/
__le32 WofProvider; // 0x0C:
__le32 ProviderVer; // 0x10: == 1 WOF_FILE_PROVIDER_CURRENT_VERSION == 1
__le32 CompressionFormat; // 0x14: 0, 1, 2, 3. See WOF_COMPRESSION_XXX
} CompressReparseBuffer;
struct {
u8 DataBuffer[1]; // 0x08:
} GenericReparseBuffer;
};
};
/* ATTR_EA_INFO (0xD0) */
#define FILE_NEED_EA 0x80 // See ntifs.h
/*
*FILE_NEED_EA, indicates that the file to which the EA belongs cannot be
* interpreted without understanding the associated extended attributes.
*/
struct EA_INFO {
__le16 size_pack; // 0x00: Size of buffer to hold in packed form.
__le16 count; // 0x02: Count of EA's with FILE_NEED_EA bit set.
__le32 size; // 0x04: Size of buffer to hold in unpacked form.
};
static_assert(sizeof(struct EA_INFO) == 8);
/* ATTR_EA (0xE0) */
struct EA_FULL {
__le32 size; // 0x00: (not in packed)
u8 flags; // 0x04:
u8 name_len; // 0x05:
__le16 elength; // 0x06:
u8 name[]; // 0x08:
};
static_assert(offsetof(struct EA_FULL, name) == 8);
#define ACL_REVISION 2
#define ACL_REVISION_DS 4
#define SE_SELF_RELATIVE cpu_to_le16(0x8000)
struct SECURITY_DESCRIPTOR_RELATIVE {
u8 Revision;
u8 Sbz1;
__le16 Control;
__le32 Owner;
__le32 Group;
__le32 Sacl;
__le32 Dacl;
};
static_assert(sizeof(struct SECURITY_DESCRIPTOR_RELATIVE) == 0x14);
struct ACE_HEADER {
u8 AceType;
u8 AceFlags;
__le16 AceSize;
};
static_assert(sizeof(struct ACE_HEADER) == 4);
struct ACL {
u8 AclRevision;
u8 Sbz1;
__le16 AclSize;
__le16 AceCount;
__le16 Sbz2;
};
static_assert(sizeof(struct ACL) == 8);
struct SID {
u8 Revision;
u8 SubAuthorityCount;
u8 IdentifierAuthority[6];
__le32 SubAuthority[];
};
static_assert(offsetof(struct SID, SubAuthority) == 8);
#endif /* _LINUX_NTFS3_NTFS_H */
// clang-format on
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