Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/ntfs/layout.h b/fs/ntfs/layout.h
new file mode 100644
index 0000000..47b3389
--- /dev/null
+++ b/fs/ntfs/layout.h
@@ -0,0 +1,2413 @@
+/*
+ * layout.h - All NTFS associated on-disk structures. Part of the Linux-NTFS
+ * project.
+ *
+ * Copyright (c) 2001-2004 Anton Altaparmakov
+ * Copyright (c) 2002 Richard Russon
+ *
+ * This program/include file is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program/include file is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (in the main directory of the Linux-NTFS
+ * distribution in the file COPYING); if not, write to the Free Software
+ * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _LINUX_NTFS_LAYOUT_H
+#define _LINUX_NTFS_LAYOUT_H
+
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/list.h>
+#include <asm/byteorder.h>
+
+#include "types.h"
+
+/*
+ * Constant endianness conversion defines.
+ */
+#define const_le16_to_cpu(x) __constant_le16_to_cpu(x)
+#define const_le32_to_cpu(x) __constant_le32_to_cpu(x)
+#define const_le64_to_cpu(x) __constant_le64_to_cpu(x)
+
+#define const_cpu_to_le16(x) __constant_cpu_to_le16(x)
+#define const_cpu_to_le32(x) __constant_cpu_to_le32(x)
+#define const_cpu_to_le64(x) __constant_cpu_to_le64(x)
+
+/* The NTFS oem_id "NTFS " */
+#define magicNTFS const_cpu_to_le64(0x202020205346544eULL)
+
+/*
+ * Location of bootsector on partition:
+ * The standard NTFS_BOOT_SECTOR is on sector 0 of the partition.
+ * On NT4 and above there is one backup copy of the boot sector to
+ * be found on the last sector of the partition (not normally accessible
+ * from within Windows as the bootsector contained number of sectors
+ * value is one less than the actual value!).
+ * On versions of NT 3.51 and earlier, the backup copy was located at
+ * number of sectors/2 (integer divide), i.e. in the middle of the volume.
+ */
+
+/*
+ * BIOS parameter block (bpb) structure.
+ */
+typedef struct {
+ le16 bytes_per_sector; /* Size of a sector in bytes. */
+ u8 sectors_per_cluster; /* Size of a cluster in sectors. */
+ le16 reserved_sectors; /* zero */
+ u8 fats; /* zero */
+ le16 root_entries; /* zero */
+ le16 sectors; /* zero */
+ u8 media_type; /* 0xf8 = hard disk */
+ le16 sectors_per_fat; /* zero */
+ le16 sectors_per_track; /* irrelevant */
+ le16 heads; /* irrelevant */
+ le32 hidden_sectors; /* zero */
+ le32 large_sectors; /* zero */
+} __attribute__ ((__packed__)) BIOS_PARAMETER_BLOCK;
+
+/*
+ * NTFS boot sector structure.
+ */
+typedef struct {
+ u8 jump[3]; /* Irrelevant (jump to boot up code).*/
+ le64 oem_id; /* Magic "NTFS ". */
+ BIOS_PARAMETER_BLOCK bpb; /* See BIOS_PARAMETER_BLOCK. */
+ u8 unused[4]; /* zero, NTFS diskedit.exe states that
+ this is actually:
+ __u8 physical_drive; // 0x80
+ __u8 current_head; // zero
+ __u8 extended_boot_signature;
+ // 0x80
+ __u8 unused; // zero
+ */
+/*0x28*/sle64 number_of_sectors; /* Number of sectors in volume. Gives
+ maximum volume size of 2^63 sectors.
+ Assuming standard sector size of 512
+ bytes, the maximum byte size is
+ approx. 4.7x10^21 bytes. (-; */
+ sle64 mft_lcn; /* Cluster location of mft data. */
+ sle64 mftmirr_lcn; /* Cluster location of copy of mft. */
+ s8 clusters_per_mft_record; /* Mft record size in clusters. */
+ u8 reserved0[3]; /* zero */
+ s8 clusters_per_index_record; /* Index block size in clusters. */
+ u8 reserved1[3]; /* zero */
+ le64 volume_serial_number; /* Irrelevant (serial number). */
+ le32 checksum; /* Boot sector checksum. */
+/*0x54*/u8 bootstrap[426]; /* Irrelevant (boot up code). */
+ le16 end_of_sector_marker; /* End of bootsector magic. Always is
+ 0xaa55 in little endian. */
+/* sizeof() = 512 (0x200) bytes */
+} __attribute__ ((__packed__)) NTFS_BOOT_SECTOR;
+
+/*
+ * Magic identifiers present at the beginning of all ntfs record containing
+ * records (like mft records for example).
+ */
+enum {
+ /* Found in $MFT/$DATA. */
+ magic_FILE = const_cpu_to_le32(0x454c4946), /* Mft entry. */
+ magic_INDX = const_cpu_to_le32(0x58444e49), /* Index buffer. */
+ magic_HOLE = const_cpu_to_le32(0x454c4f48), /* ? (NTFS 3.0+?) */
+
+ /* Found in $LogFile/$DATA. */
+ magic_RSTR = const_cpu_to_le32(0x52545352), /* Restart page. */
+ magic_RCRD = const_cpu_to_le32(0x44524352), /* Log record page. */
+
+ /* Found in $LogFile/$DATA. (May be found in $MFT/$DATA, also?) */
+ magic_CHKD = const_cpu_to_le32(0x424b4843), /* Modified by chkdsk. */
+
+ /* Found in all ntfs record containing records. */
+ magic_BAAD = const_cpu_to_le32(0x44414142), /* Failed multi sector
+ transfer was detected. */
+ /*
+ * Found in $LogFile/$DATA when a page is full of 0xff bytes and is
+ * thus not initialized. Page must be initialized before using it.
+ */
+ magic_empty = const_cpu_to_le32(0xffffffff) /* Record is empty. */
+};
+
+typedef le32 NTFS_RECORD_TYPE;
+
+/*
+ * Generic magic comparison macros. Finally found a use for the ## preprocessor
+ * operator! (-8
+ */
+
+static inline BOOL __ntfs_is_magic(le32 x, NTFS_RECORD_TYPE r)
+{
+ return (x == r);
+}
+#define ntfs_is_magic(x, m) __ntfs_is_magic(x, magic_##m)
+
+static inline BOOL __ntfs_is_magicp(le32 *p, NTFS_RECORD_TYPE r)
+{
+ return (*p == r);
+}
+#define ntfs_is_magicp(p, m) __ntfs_is_magicp(p, magic_##m)
+
+/*
+ * Specialised magic comparison macros for the NTFS_RECORD_TYPEs defined above.
+ */
+#define ntfs_is_file_record(x) ( ntfs_is_magic (x, FILE) )
+#define ntfs_is_file_recordp(p) ( ntfs_is_magicp(p, FILE) )
+#define ntfs_is_mft_record(x) ( ntfs_is_file_record (x) )
+#define ntfs_is_mft_recordp(p) ( ntfs_is_file_recordp(p) )
+#define ntfs_is_indx_record(x) ( ntfs_is_magic (x, INDX) )
+#define ntfs_is_indx_recordp(p) ( ntfs_is_magicp(p, INDX) )
+#define ntfs_is_hole_record(x) ( ntfs_is_magic (x, HOLE) )
+#define ntfs_is_hole_recordp(p) ( ntfs_is_magicp(p, HOLE) )
+
+#define ntfs_is_rstr_record(x) ( ntfs_is_magic (x, RSTR) )
+#define ntfs_is_rstr_recordp(p) ( ntfs_is_magicp(p, RSTR) )
+#define ntfs_is_rcrd_record(x) ( ntfs_is_magic (x, RCRD) )
+#define ntfs_is_rcrd_recordp(p) ( ntfs_is_magicp(p, RCRD) )
+
+#define ntfs_is_chkd_record(x) ( ntfs_is_magic (x, CHKD) )
+#define ntfs_is_chkd_recordp(p) ( ntfs_is_magicp(p, CHKD) )
+
+#define ntfs_is_baad_record(x) ( ntfs_is_magic (x, BAAD) )
+#define ntfs_is_baad_recordp(p) ( ntfs_is_magicp(p, BAAD) )
+
+#define ntfs_is_empty_record(x) ( ntfs_is_magic (x, empty) )
+#define ntfs_is_empty_recordp(p) ( ntfs_is_magicp(p, empty) )
+
+/*
+ * The Update Sequence Array (usa) is an array of the le16 values which belong
+ * to the end of each sector protected by the update sequence record in which
+ * this array is contained. Note that the first entry is the Update Sequence
+ * Number (usn), a cyclic counter of how many times the protected record has
+ * been written to disk. The values 0 and -1 (ie. 0xffff) are not used. All
+ * last le16's of each sector have to be equal to the usn (during reading) or
+ * are set to it (during writing). If they are not, an incomplete multi sector
+ * transfer has occurred when the data was written.
+ * The maximum size for the update sequence array is fixed to:
+ * maximum size = usa_ofs + (usa_count * 2) = 510 bytes
+ * The 510 bytes comes from the fact that the last le16 in the array has to
+ * (obviously) finish before the last le16 of the first 512-byte sector.
+ * This formula can be used as a consistency check in that usa_ofs +
+ * (usa_count * 2) has to be less than or equal to 510.
+ */
+typedef struct {
+ NTFS_RECORD_TYPE magic; /* A four-byte magic identifying the record
+ type and/or status. */
+ le16 usa_ofs; /* Offset to the Update Sequence Array (usa)
+ from the start of the ntfs record. */
+ le16 usa_count; /* Number of le16 sized entries in the usa
+ including the Update Sequence Number (usn),
+ thus the number of fixups is the usa_count
+ minus 1. */
+} __attribute__ ((__packed__)) NTFS_RECORD;
+
+/*
+ * System files mft record numbers. All these files are always marked as used
+ * in the bitmap attribute of the mft; presumably in order to avoid accidental
+ * allocation for random other mft records. Also, the sequence number for each
+ * of the system files is always equal to their mft record number and it is
+ * never modified.
+ */
+typedef enum {
+ FILE_MFT = 0, /* Master file table (mft). Data attribute
+ contains the entries and bitmap attribute
+ records which ones are in use (bit==1). */
+ FILE_MFTMirr = 1, /* Mft mirror: copy of first four mft records
+ in data attribute. If cluster size > 4kiB,
+ copy of first N mft records, with
+ N = cluster_size / mft_record_size. */
+ FILE_LogFile = 2, /* Journalling log in data attribute. */
+ FILE_Volume = 3, /* Volume name attribute and volume information
+ attribute (flags and ntfs version). Windows
+ refers to this file as volume DASD (Direct
+ Access Storage Device). */
+ FILE_AttrDef = 4, /* Array of attribute definitions in data
+ attribute. */
+ FILE_root = 5, /* Root directory. */
+ FILE_Bitmap = 6, /* Allocation bitmap of all clusters (lcns) in
+ data attribute. */
+ FILE_Boot = 7, /* Boot sector (always at cluster 0) in data
+ attribute. */
+ FILE_BadClus = 8, /* Contains all bad clusters in the non-resident
+ data attribute. */
+ FILE_Secure = 9, /* Shared security descriptors in data attribute
+ and two indexes into the descriptors.
+ Appeared in Windows 2000. Before that, this
+ file was named $Quota but was unused. */
+ FILE_UpCase = 10, /* Uppercase equivalents of all 65536 Unicode
+ characters in data attribute. */
+ FILE_Extend = 11, /* Directory containing other system files (eg.
+ $ObjId, $Quota, $Reparse and $UsnJrnl). This
+ is new to NTFS3.0. */
+ FILE_reserved12 = 12, /* Reserved for future use (records 12-15). */
+ FILE_reserved13 = 13,
+ FILE_reserved14 = 14,
+ FILE_reserved15 = 15,
+ FILE_first_user = 16, /* First user file, used as test limit for
+ whether to allow opening a file or not. */
+} NTFS_SYSTEM_FILES;
+
+/*
+ * These are the so far known MFT_RECORD_* flags (16-bit) which contain
+ * information about the mft record in which they are present.
+ */
+enum {
+ MFT_RECORD_IN_USE = const_cpu_to_le16(0x0001),
+ MFT_RECORD_IS_DIRECTORY = const_cpu_to_le16(0x0002),
+} __attribute__ ((__packed__));
+
+typedef le16 MFT_RECORD_FLAGS;
+
+/*
+ * mft references (aka file references or file record segment references) are
+ * used whenever a structure needs to refer to a record in the mft.
+ *
+ * A reference consists of a 48-bit index into the mft and a 16-bit sequence
+ * number used to detect stale references.
+ *
+ * For error reporting purposes we treat the 48-bit index as a signed quantity.
+ *
+ * The sequence number is a circular counter (skipping 0) describing how many
+ * times the referenced mft record has been (re)used. This has to match the
+ * sequence number of the mft record being referenced, otherwise the reference
+ * is considered stale and removed (FIXME: only ntfsck or the driver itself?).
+ *
+ * If the sequence number is zero it is assumed that no sequence number
+ * consistency checking should be performed.
+ *
+ * FIXME: Since inodes are 32-bit as of now, the driver needs to always check
+ * for high_part being 0 and if not either BUG(), cause a panic() or handle
+ * the situation in some other way. This shouldn't be a problem as a volume has
+ * to become HUGE in order to need more than 32-bits worth of mft records.
+ * Assuming the standard mft record size of 1kb only the records (never mind
+ * the non-resident attributes, etc.) would require 4Tb of space on their own
+ * for the first 32 bits worth of records. This is only if some strange person
+ * doesn't decide to foul play and make the mft sparse which would be a really
+ * horrible thing to do as it would trash our current driver implementation. )-:
+ * Do I hear screams "we want 64-bit inodes!" ?!? (-;
+ *
+ * FIXME: The mft zone is defined as the first 12% of the volume. This space is
+ * reserved so that the mft can grow contiguously and hence doesn't become
+ * fragmented. Volume free space includes the empty part of the mft zone and
+ * when the volume's free 88% are used up, the mft zone is shrunk by a factor
+ * of 2, thus making more space available for more files/data. This process is
+ * repeated everytime there is no more free space except for the mft zone until
+ * there really is no more free space.
+ */
+
+/*
+ * Typedef the MFT_REF as a 64-bit value for easier handling.
+ * Also define two unpacking macros to get to the reference (MREF) and
+ * sequence number (MSEQNO) respectively.
+ * The _LE versions are to be applied on little endian MFT_REFs.
+ * Note: The _LE versions will return a CPU endian formatted value!
+ */
+typedef enum {
+ MFT_REF_MASK_CPU = 0x0000ffffffffffffULL,
+ MFT_REF_MASK_LE = const_cpu_to_le64(0x0000ffffffffffffULL),
+} MFT_REF_CONSTS;
+
+typedef u64 MFT_REF;
+typedef le64 leMFT_REF;
+
+#define MK_MREF(m, s) ((MFT_REF)(((MFT_REF)(s) << 48) | \
+ ((MFT_REF)(m) & MFT_REF_MASK_CPU)))
+#define MK_LE_MREF(m, s) cpu_to_le64(MK_MREF(m, s))
+
+#define MREF(x) ((unsigned long)((x) & MFT_REF_MASK_CPU))
+#define MSEQNO(x) ((u16)(((x) >> 48) & 0xffff))
+#define MREF_LE(x) ((unsigned long)(le64_to_cpu(x) & MFT_REF_MASK_CPU))
+#define MSEQNO_LE(x) ((u16)((le64_to_cpu(x) >> 48) & 0xffff))
+
+#define IS_ERR_MREF(x) (((x) & 0x0000800000000000ULL) ? 1 : 0)
+#define ERR_MREF(x) ((u64)((s64)(x)))
+#define MREF_ERR(x) ((int)((s64)(x)))
+
+/*
+ * The mft record header present at the beginning of every record in the mft.
+ * This is followed by a sequence of variable length attribute records which
+ * is terminated by an attribute of type AT_END which is a truncated attribute
+ * in that it only consists of the attribute type code AT_END and none of the
+ * other members of the attribute structure are present.
+ */
+typedef struct {
+/*Ofs*/
+/* 0 NTFS_RECORD; -- Unfolded here as gcc doesn't like unnamed structs. */
+ NTFS_RECORD_TYPE magic; /* Usually the magic is "FILE". */
+ le16 usa_ofs; /* See NTFS_RECORD definition above. */
+ le16 usa_count; /* See NTFS_RECORD definition above. */
+
+/* 8*/ le64 lsn; /* $LogFile sequence number for this record.
+ Changed every time the record is modified. */
+/* 16*/ le16 sequence_number; /* Number of times this mft record has been
+ reused. (See description for MFT_REF
+ above.) NOTE: The increment (skipping zero)
+ is done when the file is deleted. NOTE: If
+ this is zero it is left zero. */
+/* 18*/ le16 link_count; /* Number of hard links, i.e. the number of
+ directory entries referencing this record.
+ NOTE: Only used in mft base records.
+ NOTE: When deleting a directory entry we
+ check the link_count and if it is 1 we
+ delete the file. Otherwise we delete the
+ FILE_NAME_ATTR being referenced by the
+ directory entry from the mft record and
+ decrement the link_count.
+ FIXME: Careful with Win32 + DOS names! */
+/* 20*/ le16 attrs_offset; /* Byte offset to the first attribute in this
+ mft record from the start of the mft record.
+ NOTE: Must be aligned to 8-byte boundary. */
+/* 22*/ MFT_RECORD_FLAGS flags; /* Bit array of MFT_RECORD_FLAGS. When a file
+ is deleted, the MFT_RECORD_IN_USE flag is
+ set to zero. */
+/* 24*/ le32 bytes_in_use; /* Number of bytes used in this mft record.
+ NOTE: Must be aligned to 8-byte boundary. */
+/* 28*/ le32 bytes_allocated; /* Number of bytes allocated for this mft
+ record. This should be equal to the mft
+ record size. */
+/* 32*/ leMFT_REF base_mft_record;/* This is zero for base mft records.
+ When it is not zero it is a mft reference
+ pointing to the base mft record to which
+ this record belongs (this is then used to
+ locate the attribute list attribute present
+ in the base record which describes this
+ extension record and hence might need
+ modification when the extension record
+ itself is modified, also locating the
+ attribute list also means finding the other
+ potential extents, belonging to the non-base
+ mft record). */
+/* 40*/ le16 next_attr_instance;/* The instance number that will be assigned to
+ the next attribute added to this mft record.
+ NOTE: Incremented each time after it is used.
+ NOTE: Every time the mft record is reused
+ this number is set to zero. NOTE: The first
+ instance number is always 0. */
+/* The below fields are specific to NTFS 3.1+ (Windows XP and above): */
+/* 42*/ le16 reserved; /* Reserved/alignment. */
+/* 44*/ le32 mft_record_number; /* Number of this mft record. */
+/* sizeof() = 48 bytes */
+/*
+ * When (re)using the mft record, we place the update sequence array at this
+ * offset, i.e. before we start with the attributes. This also makes sense,
+ * otherwise we could run into problems with the update sequence array
+ * containing in itself the last two bytes of a sector which would mean that
+ * multi sector transfer protection wouldn't work. As you can't protect data
+ * by overwriting it since you then can't get it back...
+ * When reading we obviously use the data from the ntfs record header.
+ */
+} __attribute__ ((__packed__)) MFT_RECORD;
+
+/* This is the version without the NTFS 3.1+ specific fields. */
+typedef struct {
+/*Ofs*/
+/* 0 NTFS_RECORD; -- Unfolded here as gcc doesn't like unnamed structs. */
+ NTFS_RECORD_TYPE magic; /* Usually the magic is "FILE". */
+ le16 usa_ofs; /* See NTFS_RECORD definition above. */
+ le16 usa_count; /* See NTFS_RECORD definition above. */
+
+/* 8*/ le64 lsn; /* $LogFile sequence number for this record.
+ Changed every time the record is modified. */
+/* 16*/ le16 sequence_number; /* Number of times this mft record has been
+ reused. (See description for MFT_REF
+ above.) NOTE: The increment (skipping zero)
+ is done when the file is deleted. NOTE: If
+ this is zero it is left zero. */
+/* 18*/ le16 link_count; /* Number of hard links, i.e. the number of
+ directory entries referencing this record.
+ NOTE: Only used in mft base records.
+ NOTE: When deleting a directory entry we
+ check the link_count and if it is 1 we
+ delete the file. Otherwise we delete the
+ FILE_NAME_ATTR being referenced by the
+ directory entry from the mft record and
+ decrement the link_count.
+ FIXME: Careful with Win32 + DOS names! */
+/* 20*/ le16 attrs_offset; /* Byte offset to the first attribute in this
+ mft record from the start of the mft record.
+ NOTE: Must be aligned to 8-byte boundary. */
+/* 22*/ MFT_RECORD_FLAGS flags; /* Bit array of MFT_RECORD_FLAGS. When a file
+ is deleted, the MFT_RECORD_IN_USE flag is
+ set to zero. */
+/* 24*/ le32 bytes_in_use; /* Number of bytes used in this mft record.
+ NOTE: Must be aligned to 8-byte boundary. */
+/* 28*/ le32 bytes_allocated; /* Number of bytes allocated for this mft
+ record. This should be equal to the mft
+ record size. */
+/* 32*/ leMFT_REF base_mft_record;/* This is zero for base mft records.
+ When it is not zero it is a mft reference
+ pointing to the base mft record to which
+ this record belongs (this is then used to
+ locate the attribute list attribute present
+ in the base record which describes this
+ extension record and hence might need
+ modification when the extension record
+ itself is modified, also locating the
+ attribute list also means finding the other
+ potential extents, belonging to the non-base
+ mft record). */
+/* 40*/ le16 next_attr_instance;/* The instance number that will be assigned to
+ the next attribute added to this mft record.
+ NOTE: Incremented each time after it is used.
+ NOTE: Every time the mft record is reused
+ this number is set to zero. NOTE: The first
+ instance number is always 0. */
+/* sizeof() = 42 bytes */
+/*
+ * When (re)using the mft record, we place the update sequence array at this
+ * offset, i.e. before we start with the attributes. This also makes sense,
+ * otherwise we could run into problems with the update sequence array
+ * containing in itself the last two bytes of a sector which would mean that
+ * multi sector transfer protection wouldn't work. As you can't protect data
+ * by overwriting it since you then can't get it back...
+ * When reading we obviously use the data from the ntfs record header.
+ */
+} __attribute__ ((__packed__)) MFT_RECORD_OLD;
+
+/*
+ * System defined attributes (32-bit). Each attribute type has a corresponding
+ * attribute name (Unicode string of maximum 64 character length) as described
+ * by the attribute definitions present in the data attribute of the $AttrDef
+ * system file. On NTFS 3.0 volumes the names are just as the types are named
+ * in the below defines exchanging AT_ for the dollar sign ($). If that is not
+ * a revealing choice of symbol I do not know what is... (-;
+ */
+enum {
+ AT_UNUSED = const_cpu_to_le32( 0),
+ AT_STANDARD_INFORMATION = const_cpu_to_le32( 0x10),
+ AT_ATTRIBUTE_LIST = const_cpu_to_le32( 0x20),
+ AT_FILE_NAME = const_cpu_to_le32( 0x30),
+ AT_OBJECT_ID = const_cpu_to_le32( 0x40),
+ AT_SECURITY_DESCRIPTOR = const_cpu_to_le32( 0x50),
+ AT_VOLUME_NAME = const_cpu_to_le32( 0x60),
+ AT_VOLUME_INFORMATION = const_cpu_to_le32( 0x70),
+ AT_DATA = const_cpu_to_le32( 0x80),
+ AT_INDEX_ROOT = const_cpu_to_le32( 0x90),
+ AT_INDEX_ALLOCATION = const_cpu_to_le32( 0xa0),
+ AT_BITMAP = const_cpu_to_le32( 0xb0),
+ AT_REPARSE_POINT = const_cpu_to_le32( 0xc0),
+ AT_EA_INFORMATION = const_cpu_to_le32( 0xd0),
+ AT_EA = const_cpu_to_le32( 0xe0),
+ AT_PROPERTY_SET = const_cpu_to_le32( 0xf0),
+ AT_LOGGED_UTILITY_STREAM = const_cpu_to_le32( 0x100),
+ AT_FIRST_USER_DEFINED_ATTRIBUTE = const_cpu_to_le32( 0x1000),
+ AT_END = const_cpu_to_le32(0xffffffff)
+};
+
+typedef le32 ATTR_TYPE;
+
+/*
+ * The collation rules for sorting views/indexes/etc (32-bit).
+ *
+ * COLLATION_BINARY - Collate by binary compare where the first byte is most
+ * significant.
+ * COLLATION_UNICODE_STRING - Collate Unicode strings by comparing their binary
+ * Unicode values, except that when a character can be uppercased, the
+ * upper case value collates before the lower case one.
+ * COLLATION_FILE_NAME - Collate file names as Unicode strings. The collation
+ * is done very much like COLLATION_UNICODE_STRING. In fact I have no idea
+ * what the difference is. Perhaps the difference is that file names
+ * would treat some special characters in an odd way (see
+ * unistr.c::ntfs_collate_names() and unistr.c::legal_ansi_char_array[]
+ * for what I mean but COLLATION_UNICODE_STRING would not give any special
+ * treatment to any characters at all, but this is speculation.
+ * COLLATION_NTOFS_ULONG - Sorting is done according to ascending le32 key
+ * values. E.g. used for $SII index in FILE_Secure, which sorts by
+ * security_id (le32).
+ * COLLATION_NTOFS_SID - Sorting is done according to ascending SID values.
+ * E.g. used for $O index in FILE_Extend/$Quota.
+ * COLLATION_NTOFS_SECURITY_HASH - Sorting is done first by ascending hash
+ * values and second by ascending security_id values. E.g. used for $SDH
+ * index in FILE_Secure.
+ * COLLATION_NTOFS_ULONGS - Sorting is done according to a sequence of ascending
+ * le32 key values. E.g. used for $O index in FILE_Extend/$ObjId, which
+ * sorts by object_id (16-byte), by splitting up the object_id in four
+ * le32 values and using them as individual keys. E.g. take the following
+ * two security_ids, stored as follows on disk:
+ * 1st: a1 61 65 b7 65 7b d4 11 9e 3d 00 e0 81 10 42 59
+ * 2nd: 38 14 37 d2 d2 f3 d4 11 a5 21 c8 6b 79 b1 97 45
+ * To compare them, they are split into four le32 values each, like so:
+ * 1st: 0xb76561a1 0x11d47b65 0xe0003d9e 0x59421081
+ * 2nd: 0xd2371438 0x11d4f3d2 0x6bc821a5 0x4597b179
+ * Now, it is apparent why the 2nd object_id collates after the 1st: the
+ * first le32 value of the 1st object_id is less than the first le32 of
+ * the 2nd object_id. If the first le32 values of both object_ids were
+ * equal then the second le32 values would be compared, etc.
+ */
+enum {
+ COLLATION_BINARY = const_cpu_to_le32(0x00),
+ COLLATION_FILE_NAME = const_cpu_to_le32(0x01),
+ COLLATION_UNICODE_STRING = const_cpu_to_le32(0x02),
+ COLLATION_NTOFS_ULONG = const_cpu_to_le32(0x10),
+ COLLATION_NTOFS_SID = const_cpu_to_le32(0x11),
+ COLLATION_NTOFS_SECURITY_HASH = const_cpu_to_le32(0x12),
+ COLLATION_NTOFS_ULONGS = const_cpu_to_le32(0x13)
+};
+
+typedef le32 COLLATION_RULE;
+
+/*
+ * The flags (32-bit) describing attribute properties in the attribute
+ * definition structure. FIXME: This information is from Regis's information
+ * and, according to him, it is not certain and probably incomplete.
+ * The INDEXABLE flag is fairly certainly correct as only the file name
+ * attribute has this flag set and this is the only attribute indexed in NT4.
+ */
+enum {
+ INDEXABLE = const_cpu_to_le32(0x02), /* Attribute can be
+ indexed. */
+ NEED_TO_REGENERATE = const_cpu_to_le32(0x40), /* Need to regenerate
+ during regeneration
+ phase. */
+ CAN_BE_NON_RESIDENT = const_cpu_to_le32(0x80), /* Attribute can be
+ non-resident. */
+};
+
+typedef le32 ATTR_DEF_FLAGS;
+
+/*
+ * The data attribute of FILE_AttrDef contains a sequence of attribute
+ * definitions for the NTFS volume. With this, it is supposed to be safe for an
+ * older NTFS driver to mount a volume containing a newer NTFS version without
+ * damaging it (that's the theory. In practice it's: not damaging it too much).
+ * Entries are sorted by attribute type. The flags describe whether the
+ * attribute can be resident/non-resident and possibly other things, but the
+ * actual bits are unknown.
+ */
+typedef struct {
+/*hex ofs*/
+/* 0*/ ntfschar name[0x40]; /* Unicode name of the attribute. Zero
+ terminated. */
+/* 80*/ ATTR_TYPE type; /* Type of the attribute. */
+/* 84*/ le32 display_rule; /* Default display rule.
+ FIXME: What does it mean? (AIA) */
+/* 88*/ COLLATION_RULE collation_rule; /* Default collation rule. */
+/* 8c*/ ATTR_DEF_FLAGS flags; /* Flags describing the attribute. */
+/* 90*/ sle64 min_size; /* Optional minimum attribute size. */
+/* 98*/ sle64 max_size; /* Maximum size of attribute. */
+/* sizeof() = 0xa0 or 160 bytes */
+} __attribute__ ((__packed__)) ATTR_DEF;
+
+/*
+ * Attribute flags (16-bit).
+ */
+enum {
+ ATTR_IS_COMPRESSED = const_cpu_to_le16(0x0001),
+ ATTR_COMPRESSION_MASK = const_cpu_to_le16(0x00ff), /* Compression method
+ mask. Also, first
+ illegal value. */
+ ATTR_IS_ENCRYPTED = const_cpu_to_le16(0x4000),
+ ATTR_IS_SPARSE = const_cpu_to_le16(0x8000),
+} __attribute__ ((__packed__));
+
+typedef le16 ATTR_FLAGS;
+
+/*
+ * Attribute compression.
+ *
+ * Only the data attribute is ever compressed in the current ntfs driver in
+ * Windows. Further, compression is only applied when the data attribute is
+ * non-resident. Finally, to use compression, the maximum allowed cluster size
+ * on a volume is 4kib.
+ *
+ * The compression method is based on independently compressing blocks of X
+ * clusters, where X is determined from the compression_unit value found in the
+ * non-resident attribute record header (more precisely: X = 2^compression_unit
+ * clusters). On Windows NT/2k, X always is 16 clusters (compression_unit = 4).
+ *
+ * There are three different cases of how a compression block of X clusters
+ * can be stored:
+ *
+ * 1) The data in the block is all zero (a sparse block):
+ * This is stored as a sparse block in the runlist, i.e. the runlist
+ * entry has length = X and lcn = -1. The mapping pairs array actually
+ * uses a delta_lcn value length of 0, i.e. delta_lcn is not present at
+ * all, which is then interpreted by the driver as lcn = -1.
+ * NOTE: Even uncompressed files can be sparse on NTFS 3.0 volumes, then
+ * the same principles apply as above, except that the length is not
+ * restricted to being any particular value.
+ *
+ * 2) The data in the block is not compressed:
+ * This happens when compression doesn't reduce the size of the block
+ * in clusters. I.e. if compression has a small effect so that the
+ * compressed data still occupies X clusters, then the uncompressed data
+ * is stored in the block.
+ * This case is recognised by the fact that the runlist entry has
+ * length = X and lcn >= 0. The mapping pairs array stores this as
+ * normal with a run length of X and some specific delta_lcn, i.e.
+ * delta_lcn has to be present.
+ *
+ * 3) The data in the block is compressed:
+ * The common case. This case is recognised by the fact that the run
+ * list entry has length L < X and lcn >= 0. The mapping pairs array
+ * stores this as normal with a run length of X and some specific
+ * delta_lcn, i.e. delta_lcn has to be present. This runlist entry is
+ * immediately followed by a sparse entry with length = X - L and
+ * lcn = -1. The latter entry is to make up the vcn counting to the
+ * full compression block size X.
+ *
+ * In fact, life is more complicated because adjacent entries of the same type
+ * can be coalesced. This means that one has to keep track of the number of
+ * clusters handled and work on a basis of X clusters at a time being one
+ * block. An example: if length L > X this means that this particular runlist
+ * entry contains a block of length X and part of one or more blocks of length
+ * L - X. Another example: if length L < X, this does not necessarily mean that
+ * the block is compressed as it might be that the lcn changes inside the block
+ * and hence the following runlist entry describes the continuation of the
+ * potentially compressed block. The block would be compressed if the
+ * following runlist entry describes at least X - L sparse clusters, thus
+ * making up the compression block length as described in point 3 above. (Of
+ * course, there can be several runlist entries with small lengths so that the
+ * sparse entry does not follow the first data containing entry with
+ * length < X.)
+ *
+ * NOTE: At the end of the compressed attribute value, there most likely is not
+ * just the right amount of data to make up a compression block, thus this data
+ * is not even attempted to be compressed. It is just stored as is, unless
+ * the number of clusters it occupies is reduced when compressed in which case
+ * it is stored as a compressed compression block, complete with sparse
+ * clusters at the end.
+ */
+
+/*
+ * Flags of resident attributes (8-bit).
+ */
+enum {
+ RESIDENT_ATTR_IS_INDEXED = 0x01, /* Attribute is referenced in an index
+ (has implications for deleting and
+ modifying the attribute). */
+} __attribute__ ((__packed__));
+
+typedef u8 RESIDENT_ATTR_FLAGS;
+
+/*
+ * Attribute record header. Always aligned to 8-byte boundary.
+ */
+typedef struct {
+/*Ofs*/
+/* 0*/ ATTR_TYPE type; /* The (32-bit) type of the attribute. */
+/* 4*/ le32 length; /* Byte size of the resident part of the
+ attribute (aligned to 8-byte boundary).
+ Used to get to the next attribute. */
+/* 8*/ u8 non_resident; /* If 0, attribute is resident.
+ If 1, attribute is non-resident. */
+/* 9*/ u8 name_length; /* Unicode character size of name of attribute.
+ 0 if unnamed. */
+/* 10*/ le16 name_offset; /* If name_length != 0, the byte offset to the
+ beginning of the name from the attribute
+ record. Note that the name is stored as a
+ Unicode string. When creating, place offset
+ just at the end of the record header. Then,
+ follow with attribute value or mapping pairs
+ array, resident and non-resident attributes
+ respectively, aligning to an 8-byte
+ boundary. */
+/* 12*/ ATTR_FLAGS flags; /* Flags describing the attribute. */
+/* 14*/ le16 instance; /* The instance of this attribute record. This
+ number is unique within this mft record (see
+ MFT_RECORD/next_attribute_instance notes in
+ in mft.h for more details). */
+/* 16*/ union {
+ /* Resident attributes. */
+ struct {
+/* 16 */ le32 value_length;/* Byte size of attribute value. */
+/* 20 */ le16 value_offset;/* Byte offset of the attribute
+ value from the start of the
+ attribute record. When creating,
+ align to 8-byte boundary if we
+ have a name present as this might
+ not have a length of a multiple
+ of 8-bytes. */
+/* 22 */ RESIDENT_ATTR_FLAGS flags; /* See above. */
+/* 23 */ s8 reserved; /* Reserved/alignment to 8-byte
+ boundary. */
+ } __attribute__ ((__packed__)) resident;
+ /* Non-resident attributes. */
+ struct {
+/* 16*/ leVCN lowest_vcn;/* Lowest valid virtual cluster number
+ for this portion of the attribute value or
+ 0 if this is the only extent (usually the
+ case). - Only when an attribute list is used
+ does lowest_vcn != 0 ever occur. */
+/* 24*/ leVCN highest_vcn;/* Highest valid vcn of this extent of
+ the attribute value. - Usually there is only one
+ portion, so this usually equals the attribute
+ value size in clusters minus 1. Can be -1 for
+ zero length files. Can be 0 for "single extent"
+ attributes. */
+/* 32*/ le16 mapping_pairs_offset; /* Byte offset from the
+ beginning of the structure to the mapping pairs
+ array which contains the mappings between the
+ vcns and the logical cluster numbers (lcns).
+ When creating, place this at the end of this
+ record header aligned to 8-byte boundary. */
+/* 34*/ u8 compression_unit; /* The compression unit expressed
+ as the log to the base 2 of the number of
+ clusters in a compression unit. 0 means not
+ compressed. (This effectively limits the
+ compression unit size to be a power of two
+ clusters.) WinNT4 only uses a value of 4. */
+/* 35*/ u8 reserved[5]; /* Align to 8-byte boundary. */
+/* The sizes below are only used when lowest_vcn is zero, as otherwise it would
+ be difficult to keep them up-to-date.*/
+/* 40*/ sle64 allocated_size; /* Byte size of disk space
+ allocated to hold the attribute value. Always
+ is a multiple of the cluster size. When a file
+ is compressed, this field is a multiple of the
+ compression block size (2^compression_unit) and
+ it represents the logically allocated space
+ rather than the actual on disk usage. For this
+ use the compressed_size (see below). */
+/* 48*/ sle64 data_size; /* Byte size of the attribute
+ value. Can be larger than allocated_size if
+ attribute value is compressed or sparse. */
+/* 56*/ sle64 initialized_size; /* Byte size of initialized
+ portion of the attribute value. Usually equals
+ data_size. */
+/* sizeof(uncompressed attr) = 64*/
+/* 64*/ sle64 compressed_size; /* Byte size of the attribute
+ value after compression. Only present when
+ compressed. Always is a multiple of the
+ cluster size. Represents the actual amount of
+ disk space being used on the disk. */
+/* sizeof(compressed attr) = 72*/
+ } __attribute__ ((__packed__)) non_resident;
+ } __attribute__ ((__packed__)) data;
+} __attribute__ ((__packed__)) ATTR_RECORD;
+
+typedef ATTR_RECORD ATTR_REC;
+
+/*
+ * File attribute flags (32-bit).
+ */
+enum {
+ /*
+ * The following flags are only present in the STANDARD_INFORMATION
+ * attribute (in the field file_attributes).
+ */
+ FILE_ATTR_READONLY = const_cpu_to_le32(0x00000001),
+ FILE_ATTR_HIDDEN = const_cpu_to_le32(0x00000002),
+ FILE_ATTR_SYSTEM = const_cpu_to_le32(0x00000004),
+ /* Old DOS volid. Unused in NT. = const_cpu_to_le32(0x00000008), */
+
+ FILE_ATTR_DIRECTORY = const_cpu_to_le32(0x00000010),
+ /* Note, FILE_ATTR_DIRECTORY is not considered valid in NT. It is
+ reserved for the DOS SUBDIRECTORY flag. */
+ FILE_ATTR_ARCHIVE = const_cpu_to_le32(0x00000020),
+ FILE_ATTR_DEVICE = const_cpu_to_le32(0x00000040),
+ FILE_ATTR_NORMAL = const_cpu_to_le32(0x00000080),
+
+ FILE_ATTR_TEMPORARY = const_cpu_to_le32(0x00000100),
+ FILE_ATTR_SPARSE_FILE = const_cpu_to_le32(0x00000200),
+ FILE_ATTR_REPARSE_POINT = const_cpu_to_le32(0x00000400),
+ FILE_ATTR_COMPRESSED = const_cpu_to_le32(0x00000800),
+
+ FILE_ATTR_OFFLINE = const_cpu_to_le32(0x00001000),
+ FILE_ATTR_NOT_CONTENT_INDEXED = const_cpu_to_le32(0x00002000),
+ FILE_ATTR_ENCRYPTED = const_cpu_to_le32(0x00004000),
+
+ FILE_ATTR_VALID_FLAGS = const_cpu_to_le32(0x00007fb7),
+ /* Note, FILE_ATTR_VALID_FLAGS masks out the old DOS VolId and the
+ FILE_ATTR_DEVICE and preserves everything else. This mask is used
+ to obtain all flags that are valid for reading. */
+ FILE_ATTR_VALID_SET_FLAGS = const_cpu_to_le32(0x000031a7),
+ /* Note, FILE_ATTR_VALID_SET_FLAGS masks out the old DOS VolId, the
+ F_A_DEVICE, F_A_DIRECTORY, F_A_SPARSE_FILE, F_A_REPARSE_POINT,
+ F_A_COMPRESSED, and F_A_ENCRYPTED and preserves the rest. This mask
+ is used to to obtain all flags that are valid for setting. */
+
+ /*
+ * The following flags are only present in the FILE_NAME attribute (in
+ * the field file_attributes).
+ */
+ FILE_ATTR_DUP_FILE_NAME_INDEX_PRESENT = const_cpu_to_le32(0x10000000),
+ /* Note, this is a copy of the corresponding bit from the mft record,
+ telling us whether this is a directory or not, i.e. whether it has
+ an index root attribute or not. */
+ FILE_ATTR_DUP_VIEW_INDEX_PRESENT = const_cpu_to_le32(0x20000000),
+ /* Note, this is a copy of the corresponding bit from the mft record,
+ telling us whether this file has a view index present (eg. object id
+ index, quota index, one of the security indexes or the encrypting
+ file system related indexes). */
+};
+
+typedef le32 FILE_ATTR_FLAGS;
+
+/*
+ * NOTE on times in NTFS: All times are in MS standard time format, i.e. they
+ * are the number of 100-nanosecond intervals since 1st January 1601, 00:00:00
+ * universal coordinated time (UTC). (In Linux time starts 1st January 1970,
+ * 00:00:00 UTC and is stored as the number of 1-second intervals since then.)
+ */
+
+/*
+ * Attribute: Standard information (0x10).
+ *
+ * NOTE: Always resident.
+ * NOTE: Present in all base file records on a volume.
+ * NOTE: There is conflicting information about the meaning of each of the time
+ * fields but the meaning as defined below has been verified to be
+ * correct by practical experimentation on Windows NT4 SP6a and is hence
+ * assumed to be the one and only correct interpretation.
+ */
+typedef struct {
+/*Ofs*/
+/* 0*/ sle64 creation_time; /* Time file was created. Updated when
+ a filename is changed(?). */
+/* 8*/ sle64 last_data_change_time; /* Time the data attribute was last
+ modified. */
+/* 16*/ sle64 last_mft_change_time; /* Time this mft record was last
+ modified. */
+/* 24*/ sle64 last_access_time; /* Approximate time when the file was
+ last accessed (obviously this is not
+ updated on read-only volumes). In
+ Windows this is only updated when
+ accessed if some time delta has
+ passed since the last update. Also,
+ last access times updates can be
+ disabled altogether for speed. */
+/* 32*/ FILE_ATTR_FLAGS file_attributes; /* Flags describing the file. */
+/* 36*/ union {
+ /* NTFS 1.2 */
+ struct {
+ /* 36*/ u8 reserved12[12]; /* Reserved/alignment to 8-byte
+ boundary. */
+ } __attribute__ ((__packed__)) v1;
+ /* sizeof() = 48 bytes */
+ /* NTFS 3.x */
+ struct {
+/*
+ * If a volume has been upgraded from a previous NTFS version, then these
+ * fields are present only if the file has been accessed since the upgrade.
+ * Recognize the difference by comparing the length of the resident attribute
+ * value. If it is 48, then the following fields are missing. If it is 72 then
+ * the fields are present. Maybe just check like this:
+ * if (resident.ValueLength < sizeof(STANDARD_INFORMATION)) {
+ * Assume NTFS 1.2- format.
+ * If (volume version is 3.x)
+ * Upgrade attribute to NTFS 3.x format.
+ * else
+ * Use NTFS 1.2- format for access.
+ * } else
+ * Use NTFS 3.x format for access.
+ * Only problem is that it might be legal to set the length of the value to
+ * arbitrarily large values thus spoiling this check. - But chkdsk probably
+ * views that as a corruption, assuming that it behaves like this for all
+ * attributes.
+ */
+ /* 36*/ le32 maximum_versions; /* Maximum allowed versions for
+ file. Zero if version numbering is disabled. */
+ /* 40*/ le32 version_number; /* This file's version (if any).
+ Set to zero if maximum_versions is zero. */
+ /* 44*/ le32 class_id; /* Class id from bidirectional
+ class id index (?). */
+ /* 48*/ le32 owner_id; /* Owner_id of the user owning
+ the file. Translate via $Q index in FILE_Extend
+ /$Quota to the quota control entry for the user
+ owning the file. Zero if quotas are disabled. */
+ /* 52*/ le32 security_id; /* Security_id for the file.
+ Translate via $SII index and $SDS data stream
+ in FILE_Secure to the security descriptor. */
+ /* 56*/ le64 quota_charged; /* Byte size of the charge to
+ the quota for all streams of the file. Note: Is
+ zero if quotas are disabled. */
+ /* 64*/ le64 usn; /* Last update sequence number
+ of the file. This is a direct index into the
+ change (aka usn) journal file. It is zero if
+ the usn journal is disabled.
+ NOTE: To disable the journal need to delete
+ the journal file itself and to then walk the
+ whole mft and set all Usn entries in all mft
+ records to zero! (This can take a while!)
+ The journal is FILE_Extend/$UsnJrnl. Win2k
+ will recreate the journal and initiate
+ logging if necessary when mounting the
+ partition. This, in contrast to disabling the
+ journal is a very fast process, so the user
+ won't even notice it. */
+ } __attribute__ ((__packed__)) v3;
+ /* sizeof() = 72 bytes (NTFS 3.x) */
+ } __attribute__ ((__packed__)) ver;
+} __attribute__ ((__packed__)) STANDARD_INFORMATION;
+
+/*
+ * Attribute: Attribute list (0x20).
+ *
+ * - Can be either resident or non-resident.
+ * - Value consists of a sequence of variable length, 8-byte aligned,
+ * ATTR_LIST_ENTRY records.
+ * - The list is not terminated by anything at all! The only way to know when
+ * the end is reached is to keep track of the current offset and compare it to
+ * the attribute value size.
+ * - The attribute list attribute contains one entry for each attribute of
+ * the file in which the list is located, except for the list attribute
+ * itself. The list is sorted: first by attribute type, second by attribute
+ * name (if present), third by instance number. The extents of one
+ * non-resident attribute (if present) immediately follow after the initial
+ * extent. They are ordered by lowest_vcn and have their instace set to zero.
+ * It is not allowed to have two attributes with all sorting keys equal.
+ * - Further restrictions:
+ * - If not resident, the vcn to lcn mapping array has to fit inside the
+ * base mft record.
+ * - The attribute list attribute value has a maximum size of 256kb. This
+ * is imposed by the Windows cache manager.
+ * - Attribute lists are only used when the attributes of mft record do not
+ * fit inside the mft record despite all attributes (that can be made
+ * non-resident) having been made non-resident. This can happen e.g. when:
+ * - File has a large number of hard links (lots of file name
+ * attributes present).
+ * - The mapping pairs array of some non-resident attribute becomes so
+ * large due to fragmentation that it overflows the mft record.
+ * - The security descriptor is very complex (not applicable to
+ * NTFS 3.0 volumes).
+ * - There are many named streams.
+ */
+typedef struct {
+/*Ofs*/
+/* 0*/ ATTR_TYPE type; /* Type of referenced attribute. */
+/* 4*/ le16 length; /* Byte size of this entry (8-byte aligned). */
+/* 6*/ u8 name_length; /* Size in Unicode chars of the name of the
+ attribute or 0 if unnamed. */
+/* 7*/ u8 name_offset; /* Byte offset to beginning of attribute name
+ (always set this to where the name would
+ start even if unnamed). */
+/* 8*/ leVCN lowest_vcn; /* Lowest virtual cluster number of this portion
+ of the attribute value. This is usually 0. It
+ is non-zero for the case where one attribute
+ does not fit into one mft record and thus
+ several mft records are allocated to hold
+ this attribute. In the latter case, each mft
+ record holds one extent of the attribute and
+ there is one attribute list entry for each
+ extent. NOTE: This is DEFINITELY a signed
+ value! The windows driver uses cmp, followed
+ by jg when comparing this, thus it treats it
+ as signed. */
+/* 16*/ leMFT_REF mft_reference;/* The reference of the mft record holding
+ the ATTR_RECORD for this portion of the
+ attribute value. */
+/* 24*/ le16 instance; /* If lowest_vcn = 0, the instance of the
+ attribute being referenced; otherwise 0. */
+/* 26*/ ntfschar name[0]; /* Use when creating only. When reading use
+ name_offset to determine the location of the
+ name. */
+/* sizeof() = 26 + (attribute_name_length * 2) bytes */
+} __attribute__ ((__packed__)) ATTR_LIST_ENTRY;
+
+/*
+ * The maximum allowed length for a file name.
+ */
+#define MAXIMUM_FILE_NAME_LENGTH 255
+
+/*
+ * Possible namespaces for filenames in ntfs (8-bit).
+ */
+enum {
+ FILE_NAME_POSIX = 0x00,
+ /* This is the largest namespace. It is case sensitive and allows all
+ Unicode characters except for: '\0' and '/'. Beware that in
+ WinNT/2k files which eg have the same name except for their case
+ will not be distinguished by the standard utilities and thus a "del
+ filename" will delete both "filename" and "fileName" without
+ warning. */
+ FILE_NAME_WIN32 = 0x01,
+ /* The standard WinNT/2k NTFS long filenames. Case insensitive. All
+ Unicode chars except: '\0', '"', '*', '/', ':', '<', '>', '?', '\',
+ and '|'. Further, names cannot end with a '.' or a space. */
+ FILE_NAME_DOS = 0x02,
+ /* The standard DOS filenames (8.3 format). Uppercase only. All 8-bit
+ characters greater space, except: '"', '*', '+', ',', '/', ':', ';',
+ '<', '=', '>', '?', and '\'. */
+ FILE_NAME_WIN32_AND_DOS = 0x03,
+ /* 3 means that both the Win32 and the DOS filenames are identical and
+ hence have been saved in this single filename record. */
+} __attribute__ ((__packed__));
+
+typedef u8 FILE_NAME_TYPE_FLAGS;
+
+/*
+ * Attribute: Filename (0x30).
+ *
+ * NOTE: Always resident.
+ * NOTE: All fields, except the parent_directory, are only updated when the
+ * filename is changed. Until then, they just become out of sync with
+ * reality and the more up to date values are present in the standard
+ * information attribute.
+ * NOTE: There is conflicting information about the meaning of each of the time
+ * fields but the meaning as defined below has been verified to be
+ * correct by practical experimentation on Windows NT4 SP6a and is hence
+ * assumed to be the one and only correct interpretation.
+ */
+typedef struct {
+/*hex ofs*/
+/* 0*/ leMFT_REF parent_directory; /* Directory this filename is
+ referenced from. */
+/* 8*/ sle64 creation_time; /* Time file was created. */
+/* 10*/ sle64 last_data_change_time; /* Time the data attribute was last
+ modified. */
+/* 18*/ sle64 last_mft_change_time; /* Time this mft record was last
+ modified. */
+/* 20*/ sle64 last_access_time; /* Time this mft record was last
+ accessed. */
+/* 28*/ sle64 allocated_size; /* Byte size of allocated space for the
+ data attribute. NOTE: Is a multiple
+ of the cluster size. */
+/* 30*/ sle64 data_size; /* Byte size of actual data in data
+ attribute. */
+/* 38*/ FILE_ATTR_FLAGS file_attributes; /* Flags describing the file. */
+/* 3c*/ union {
+ /* 3c*/ struct {
+ /* 3c*/ le16 packed_ea_size; /* Size of the buffer needed to
+ pack the extended attributes
+ (EAs), if such are present.*/
+ /* 3e*/ le16 reserved; /* Reserved for alignment. */
+ } __attribute__ ((__packed__)) ea;
+ /* 3c*/ struct {
+ /* 3c*/ le32 reparse_point_tag; /* Type of reparse point,
+ present only in reparse
+ points and only if there are
+ no EAs. */
+ } __attribute__ ((__packed__)) rp;
+ } __attribute__ ((__packed__)) type;
+/* 40*/ u8 file_name_length; /* Length of file name in
+ (Unicode) characters. */
+/* 41*/ FILE_NAME_TYPE_FLAGS file_name_type; /* Namespace of the file name.*/
+/* 42*/ ntfschar file_name[0]; /* File name in Unicode. */
+} __attribute__ ((__packed__)) FILE_NAME_ATTR;
+
+/*
+ * GUID structures store globally unique identifiers (GUID). A GUID is a
+ * 128-bit value consisting of one group of eight hexadecimal digits, followed
+ * by three groups of four hexadecimal digits each, followed by one group of
+ * twelve hexadecimal digits. GUIDs are Microsoft's implementation of the
+ * distributed computing environment (DCE) universally unique identifier (UUID).
+ * Example of a GUID:
+ * 1F010768-5A73-BC91-0010A52216A7
+ */
+typedef struct {
+ le32 data1; /* The first eight hexadecimal digits of the GUID. */
+ le16 data2; /* The first group of four hexadecimal digits. */
+ le16 data3; /* The second group of four hexadecimal digits. */
+ u8 data4[8]; /* The first two bytes are the third group of four
+ hexadecimal digits. The remaining six bytes are the
+ final 12 hexadecimal digits. */
+} __attribute__ ((__packed__)) GUID;
+
+/*
+ * FILE_Extend/$ObjId contains an index named $O. This index contains all
+ * object_ids present on the volume as the index keys and the corresponding
+ * mft_record numbers as the index entry data parts. The data part (defined
+ * below) also contains three other object_ids:
+ * birth_volume_id - object_id of FILE_Volume on which the file was first
+ * created. Optional (i.e. can be zero).
+ * birth_object_id - object_id of file when it was first created. Usually
+ * equals the object_id. Optional (i.e. can be zero).
+ * domain_id - Reserved (always zero).
+ */
+typedef struct {
+ leMFT_REF mft_reference;/* Mft record containing the object_id in
+ the index entry key. */
+ union {
+ struct {
+ GUID birth_volume_id;
+ GUID birth_object_id;
+ GUID domain_id;
+ } __attribute__ ((__packed__)) origin;
+ u8 extended_info[48];
+ } __attribute__ ((__packed__)) opt;
+} __attribute__ ((__packed__)) OBJ_ID_INDEX_DATA;
+
+/*
+ * Attribute: Object id (NTFS 3.0+) (0x40).
+ *
+ * NOTE: Always resident.
+ */
+typedef struct {
+ GUID object_id; /* Unique id assigned to the
+ file.*/
+ /* The following fields are optional. The attribute value size is 16
+ bytes, i.e. sizeof(GUID), if these are not present at all. Note,
+ the entries can be present but one or more (or all) can be zero
+ meaning that that particular value(s) is(are) not defined. */
+ union {
+ struct {
+ GUID birth_volume_id; /* Unique id of volume on which
+ the file was first created.*/
+ GUID birth_object_id; /* Unique id of file when it was
+ first created. */
+ GUID domain_id; /* Reserved, zero. */
+ } __attribute__ ((__packed__)) origin;
+ u8 extended_info[48];
+ } __attribute__ ((__packed__)) opt;
+} __attribute__ ((__packed__)) OBJECT_ID_ATTR;
+
+/*
+ * The pre-defined IDENTIFIER_AUTHORITIES used as SID_IDENTIFIER_AUTHORITY in
+ * the SID structure (see below).
+ */
+//typedef enum { /* SID string prefix. */
+// SECURITY_NULL_SID_AUTHORITY = {0, 0, 0, 0, 0, 0}, /* S-1-0 */
+// SECURITY_WORLD_SID_AUTHORITY = {0, 0, 0, 0, 0, 1}, /* S-1-1 */
+// SECURITY_LOCAL_SID_AUTHORITY = {0, 0, 0, 0, 0, 2}, /* S-1-2 */
+// SECURITY_CREATOR_SID_AUTHORITY = {0, 0, 0, 0, 0, 3}, /* S-1-3 */
+// SECURITY_NON_UNIQUE_AUTHORITY = {0, 0, 0, 0, 0, 4}, /* S-1-4 */
+// SECURITY_NT_SID_AUTHORITY = {0, 0, 0, 0, 0, 5}, /* S-1-5 */
+//} IDENTIFIER_AUTHORITIES;
+
+/*
+ * These relative identifiers (RIDs) are used with the above identifier
+ * authorities to make up universal well-known SIDs.
+ *
+ * Note: The relative identifier (RID) refers to the portion of a SID, which
+ * identifies a user or group in relation to the authority that issued the SID.
+ * For example, the universal well-known SID Creator Owner ID (S-1-3-0) is
+ * made up of the identifier authority SECURITY_CREATOR_SID_AUTHORITY (3) and
+ * the relative identifier SECURITY_CREATOR_OWNER_RID (0).
+ */
+typedef enum { /* Identifier authority. */
+ SECURITY_NULL_RID = 0, /* S-1-0 */
+ SECURITY_WORLD_RID = 0, /* S-1-1 */
+ SECURITY_LOCAL_RID = 0, /* S-1-2 */
+
+ SECURITY_CREATOR_OWNER_RID = 0, /* S-1-3 */
+ SECURITY_CREATOR_GROUP_RID = 1, /* S-1-3 */
+
+ SECURITY_CREATOR_OWNER_SERVER_RID = 2, /* S-1-3 */
+ SECURITY_CREATOR_GROUP_SERVER_RID = 3, /* S-1-3 */
+
+ SECURITY_DIALUP_RID = 1,
+ SECURITY_NETWORK_RID = 2,
+ SECURITY_BATCH_RID = 3,
+ SECURITY_INTERACTIVE_RID = 4,
+ SECURITY_SERVICE_RID = 6,
+ SECURITY_ANONYMOUS_LOGON_RID = 7,
+ SECURITY_PROXY_RID = 8,
+ SECURITY_ENTERPRISE_CONTROLLERS_RID=9,
+ SECURITY_SERVER_LOGON_RID = 9,
+ SECURITY_PRINCIPAL_SELF_RID = 0xa,
+ SECURITY_AUTHENTICATED_USER_RID = 0xb,
+ SECURITY_RESTRICTED_CODE_RID = 0xc,
+ SECURITY_TERMINAL_SERVER_RID = 0xd,
+
+ SECURITY_LOGON_IDS_RID = 5,
+ SECURITY_LOGON_IDS_RID_COUNT = 3,
+
+ SECURITY_LOCAL_SYSTEM_RID = 0x12,
+
+ SECURITY_NT_NON_UNIQUE = 0x15,
+
+ SECURITY_BUILTIN_DOMAIN_RID = 0x20,
+
+ /*
+ * Well-known domain relative sub-authority values (RIDs).
+ */
+
+ /* Users. */
+ DOMAIN_USER_RID_ADMIN = 0x1f4,
+ DOMAIN_USER_RID_GUEST = 0x1f5,
+ DOMAIN_USER_RID_KRBTGT = 0x1f6,
+
+ /* Groups. */
+ DOMAIN_GROUP_RID_ADMINS = 0x200,
+ DOMAIN_GROUP_RID_USERS = 0x201,
+ DOMAIN_GROUP_RID_GUESTS = 0x202,
+ DOMAIN_GROUP_RID_COMPUTERS = 0x203,
+ DOMAIN_GROUP_RID_CONTROLLERS = 0x204,
+ DOMAIN_GROUP_RID_CERT_ADMINS = 0x205,
+ DOMAIN_GROUP_RID_SCHEMA_ADMINS = 0x206,
+ DOMAIN_GROUP_RID_ENTERPRISE_ADMINS= 0x207,
+ DOMAIN_GROUP_RID_POLICY_ADMINS = 0x208,
+
+ /* Aliases. */
+ DOMAIN_ALIAS_RID_ADMINS = 0x220,
+ DOMAIN_ALIAS_RID_USERS = 0x221,
+ DOMAIN_ALIAS_RID_GUESTS = 0x222,
+ DOMAIN_ALIAS_RID_POWER_USERS = 0x223,
+
+ DOMAIN_ALIAS_RID_ACCOUNT_OPS = 0x224,
+ DOMAIN_ALIAS_RID_SYSTEM_OPS = 0x225,
+ DOMAIN_ALIAS_RID_PRINT_OPS = 0x226,
+ DOMAIN_ALIAS_RID_BACKUP_OPS = 0x227,
+
+ DOMAIN_ALIAS_RID_REPLICATOR = 0x228,
+ DOMAIN_ALIAS_RID_RAS_SERVERS = 0x229,
+ DOMAIN_ALIAS_RID_PREW2KCOMPACCESS = 0x22a,
+} RELATIVE_IDENTIFIERS;
+
+/*
+ * The universal well-known SIDs:
+ *
+ * NULL_SID S-1-0-0
+ * WORLD_SID S-1-1-0
+ * LOCAL_SID S-1-2-0
+ * CREATOR_OWNER_SID S-1-3-0
+ * CREATOR_GROUP_SID S-1-3-1
+ * CREATOR_OWNER_SERVER_SID S-1-3-2
+ * CREATOR_GROUP_SERVER_SID S-1-3-3
+ *
+ * (Non-unique IDs) S-1-4
+ *
+ * NT well-known SIDs:
+ *
+ * NT_AUTHORITY_SID S-1-5
+ * DIALUP_SID S-1-5-1
+ *
+ * NETWORD_SID S-1-5-2
+ * BATCH_SID S-1-5-3
+ * INTERACTIVE_SID S-1-5-4
+ * SERVICE_SID S-1-5-6
+ * ANONYMOUS_LOGON_SID S-1-5-7 (aka null logon session)
+ * PROXY_SID S-1-5-8
+ * SERVER_LOGON_SID S-1-5-9 (aka domain controller account)
+ * SELF_SID S-1-5-10 (self RID)
+ * AUTHENTICATED_USER_SID S-1-5-11
+ * RESTRICTED_CODE_SID S-1-5-12 (running restricted code)
+ * TERMINAL_SERVER_SID S-1-5-13 (running on terminal server)
+ *
+ * (Logon IDs) S-1-5-5-X-Y
+ *
+ * (NT non-unique IDs) S-1-5-0x15-...
+ *
+ * (Built-in domain) S-1-5-0x20
+ */
+
+/*
+ * The SID_IDENTIFIER_AUTHORITY is a 48-bit value used in the SID structure.
+ *
+ * NOTE: This is stored as a big endian number, hence the high_part comes
+ * before the low_part.
+ */
+typedef union {
+ struct {
+ u16 high_part; /* High 16-bits. */
+ u32 low_part; /* Low 32-bits. */
+ } __attribute__ ((__packed__)) parts;
+ u8 value[6]; /* Value as individual bytes. */
+} __attribute__ ((__packed__)) SID_IDENTIFIER_AUTHORITY;
+
+/*
+ * The SID structure is a variable-length structure used to uniquely identify
+ * users or groups. SID stands for security identifier.
+ *
+ * The standard textual representation of the SID is of the form:
+ * S-R-I-S-S...
+ * Where:
+ * - The first "S" is the literal character 'S' identifying the following
+ * digits as a SID.
+ * - R is the revision level of the SID expressed as a sequence of digits
+ * either in decimal or hexadecimal (if the later, prefixed by "0x").
+ * - I is the 48-bit identifier_authority, expressed as digits as R above.
+ * - S... is one or more sub_authority values, expressed as digits as above.
+ *
+ * Example SID; the domain-relative SID of the local Administrators group on
+ * Windows NT/2k:
+ * S-1-5-32-544
+ * This translates to a SID with:
+ * revision = 1,
+ * sub_authority_count = 2,
+ * identifier_authority = {0,0,0,0,0,5}, // SECURITY_NT_AUTHORITY
+ * sub_authority[0] = 32, // SECURITY_BUILTIN_DOMAIN_RID
+ * sub_authority[1] = 544 // DOMAIN_ALIAS_RID_ADMINS
+ */
+typedef struct {
+ u8 revision;
+ u8 sub_authority_count;
+ SID_IDENTIFIER_AUTHORITY identifier_authority;
+ le32 sub_authority[1]; /* At least one sub_authority. */
+} __attribute__ ((__packed__)) SID;
+
+/*
+ * Current constants for SIDs.
+ */
+typedef enum {
+ SID_REVISION = 1, /* Current revision level. */
+ SID_MAX_SUB_AUTHORITIES = 15, /* Maximum number of those. */
+ SID_RECOMMENDED_SUB_AUTHORITIES = 1, /* Will change to around 6 in
+ a future revision. */
+} SID_CONSTANTS;
+
+/*
+ * The predefined ACE types (8-bit, see below).
+ */
+enum {
+ ACCESS_MIN_MS_ACE_TYPE = 0,
+ ACCESS_ALLOWED_ACE_TYPE = 0,
+ ACCESS_DENIED_ACE_TYPE = 1,
+ SYSTEM_AUDIT_ACE_TYPE = 2,
+ SYSTEM_ALARM_ACE_TYPE = 3, /* Not implemented as of Win2k. */
+ ACCESS_MAX_MS_V2_ACE_TYPE = 3,
+
+ ACCESS_ALLOWED_COMPOUND_ACE_TYPE= 4,
+ ACCESS_MAX_MS_V3_ACE_TYPE = 4,
+
+ /* The following are Win2k only. */
+ ACCESS_MIN_MS_OBJECT_ACE_TYPE = 5,
+ ACCESS_ALLOWED_OBJECT_ACE_TYPE = 5,
+ ACCESS_DENIED_OBJECT_ACE_TYPE = 6,
+ SYSTEM_AUDIT_OBJECT_ACE_TYPE = 7,
+ SYSTEM_ALARM_OBJECT_ACE_TYPE = 8,
+ ACCESS_MAX_MS_OBJECT_ACE_TYPE = 8,
+
+ ACCESS_MAX_MS_V4_ACE_TYPE = 8,
+
+ /* This one is for WinNT/2k. */
+ ACCESS_MAX_MS_ACE_TYPE = 8,
+} __attribute__ ((__packed__));
+
+typedef u8 ACE_TYPES;
+
+/*
+ * The ACE flags (8-bit) for audit and inheritance (see below).
+ *
+ * SUCCESSFUL_ACCESS_ACE_FLAG is only used with system audit and alarm ACE
+ * types to indicate that a message is generated (in Windows!) for successful
+ * accesses.
+ *
+ * FAILED_ACCESS_ACE_FLAG is only used with system audit and alarm ACE types
+ * to indicate that a message is generated (in Windows!) for failed accesses.
+ */
+enum {
+ /* The inheritance flags. */
+ OBJECT_INHERIT_ACE = 0x01,
+ CONTAINER_INHERIT_ACE = 0x02,
+ NO_PROPAGATE_INHERIT_ACE = 0x04,
+ INHERIT_ONLY_ACE = 0x08,
+ INHERITED_ACE = 0x10, /* Win2k only. */
+ VALID_INHERIT_FLAGS = 0x1f,
+
+ /* The audit flags. */
+ SUCCESSFUL_ACCESS_ACE_FLAG = 0x40,
+ FAILED_ACCESS_ACE_FLAG = 0x80,
+} __attribute__ ((__packed__));
+
+typedef u8 ACE_FLAGS;
+
+/*
+ * An ACE is an access-control entry in an access-control list (ACL).
+ * An ACE defines access to an object for a specific user or group or defines
+ * the types of access that generate system-administration messages or alarms
+ * for a specific user or group. The user or group is identified by a security
+ * identifier (SID).
+ *
+ * Each ACE starts with an ACE_HEADER structure (aligned on 4-byte boundary),
+ * which specifies the type and size of the ACE. The format of the subsequent
+ * data depends on the ACE type.
+ */
+typedef struct {
+/*Ofs*/
+/* 0*/ ACE_TYPES type; /* Type of the ACE. */
+/* 1*/ ACE_FLAGS flags; /* Flags describing the ACE. */
+/* 2*/ le16 size; /* Size in bytes of the ACE. */
+} __attribute__ ((__packed__)) ACE_HEADER;
+
+/*
+ * The access mask (32-bit). Defines the access rights.
+ *
+ * The specific rights (bits 0 to 15). These depend on the type of the object
+ * being secured by the ACE.
+ */
+enum {
+ /* Specific rights for files and directories are as follows: */
+
+ /* Right to read data from the file. (FILE) */
+ FILE_READ_DATA = const_cpu_to_le32(0x00000001),
+ /* Right to list contents of a directory. (DIRECTORY) */
+ FILE_LIST_DIRECTORY = const_cpu_to_le32(0x00000001),
+
+ /* Right to write data to the file. (FILE) */
+ FILE_WRITE_DATA = const_cpu_to_le32(0x00000002),
+ /* Right to create a file in the directory. (DIRECTORY) */
+ FILE_ADD_FILE = const_cpu_to_le32(0x00000002),
+
+ /* Right to append data to the file. (FILE) */
+ FILE_APPEND_DATA = const_cpu_to_le32(0x00000004),
+ /* Right to create a subdirectory. (DIRECTORY) */
+ FILE_ADD_SUBDIRECTORY = const_cpu_to_le32(0x00000004),
+
+ /* Right to read extended attributes. (FILE/DIRECTORY) */
+ FILE_READ_EA = const_cpu_to_le32(0x00000008),
+
+ /* Right to write extended attributes. (FILE/DIRECTORY) */
+ FILE_WRITE_EA = const_cpu_to_le32(0x00000010),
+
+ /* Right to execute a file. (FILE) */
+ FILE_EXECUTE = const_cpu_to_le32(0x00000020),
+ /* Right to traverse the directory. (DIRECTORY) */
+ FILE_TRAVERSE = const_cpu_to_le32(0x00000020),
+
+ /*
+ * Right to delete a directory and all the files it contains (its
+ * children), even if the files are read-only. (DIRECTORY)
+ */
+ FILE_DELETE_CHILD = const_cpu_to_le32(0x00000040),
+
+ /* Right to read file attributes. (FILE/DIRECTORY) */
+ FILE_READ_ATTRIBUTES = const_cpu_to_le32(0x00000080),
+
+ /* Right to change file attributes. (FILE/DIRECTORY) */
+ FILE_WRITE_ATTRIBUTES = const_cpu_to_le32(0x00000100),
+
+ /*
+ * The standard rights (bits 16 to 23). These are independent of the
+ * type of object being secured.
+ */
+
+ /* Right to delete the object. */
+ DELETE = const_cpu_to_le32(0x00010000),
+
+ /*
+ * Right to read the information in the object's security descriptor,
+ * not including the information in the SACL, i.e. right to read the
+ * security descriptor and owner.
+ */
+ READ_CONTROL = const_cpu_to_le32(0x00020000),
+
+ /* Right to modify the DACL in the object's security descriptor. */
+ WRITE_DAC = const_cpu_to_le32(0x00040000),
+
+ /* Right to change the owner in the object's security descriptor. */
+ WRITE_OWNER = const_cpu_to_le32(0x00080000),
+
+ /*
+ * Right to use the object for synchronization. Enables a process to
+ * wait until the object is in the signalled state. Some object types
+ * do not support this access right.
+ */
+ SYNCHRONIZE = const_cpu_to_le32(0x00100000),
+
+ /*
+ * The following STANDARD_RIGHTS_* are combinations of the above for
+ * convenience and are defined by the Win32 API.
+ */
+
+ /* These are currently defined to READ_CONTROL. */
+ STANDARD_RIGHTS_READ = const_cpu_to_le32(0x00020000),
+ STANDARD_RIGHTS_WRITE = const_cpu_to_le32(0x00020000),
+ STANDARD_RIGHTS_EXECUTE = const_cpu_to_le32(0x00020000),
+
+ /* Combines DELETE, READ_CONTROL, WRITE_DAC, and WRITE_OWNER access. */
+ STANDARD_RIGHTS_REQUIRED = const_cpu_to_le32(0x000f0000),
+
+ /*
+ * Combines DELETE, READ_CONTROL, WRITE_DAC, WRITE_OWNER, and
+ * SYNCHRONIZE access.
+ */
+ STANDARD_RIGHTS_ALL = const_cpu_to_le32(0x001f0000),
+
+ /*
+ * The access system ACL and maximum allowed access types (bits 24 to
+ * 25, bits 26 to 27 are reserved).
+ */
+ ACCESS_SYSTEM_SECURITY = const_cpu_to_le32(0x01000000),
+ MAXIMUM_ALLOWED = const_cpu_to_le32(0x02000000),
+
+ /*
+ * The generic rights (bits 28 to 31). These map onto the standard and
+ * specific rights.
+ */
+
+ /* Read, write, and execute access. */
+ GENERIC_ALL = const_cpu_to_le32(0x10000000),
+
+ /* Execute access. */
+ GENERIC_EXECUTE = const_cpu_to_le32(0x20000000),
+
+ /*
+ * Write access. For files, this maps onto:
+ * FILE_APPEND_DATA | FILE_WRITE_ATTRIBUTES | FILE_WRITE_DATA |
+ * FILE_WRITE_EA | STANDARD_RIGHTS_WRITE | SYNCHRONIZE
+ * For directories, the mapping has the same numerical value. See
+ * above for the descriptions of the rights granted.
+ */
+ GENERIC_WRITE = const_cpu_to_le32(0x40000000),
+
+ /*
+ * Read access. For files, this maps onto:
+ * FILE_READ_ATTRIBUTES | FILE_READ_DATA | FILE_READ_EA |
+ * STANDARD_RIGHTS_READ | SYNCHRONIZE
+ * For directories, the mapping has the same numberical value. See
+ * above for the descriptions of the rights granted.
+ */
+ GENERIC_READ = const_cpu_to_le32(0x80000000),
+};
+
+typedef le32 ACCESS_MASK;
+
+/*
+ * The generic mapping array. Used to denote the mapping of each generic
+ * access right to a specific access mask.
+ *
+ * FIXME: What exactly is this and what is it for? (AIA)
+ */
+typedef struct {
+ ACCESS_MASK generic_read;
+ ACCESS_MASK generic_write;
+ ACCESS_MASK generic_execute;
+ ACCESS_MASK generic_all;
+} __attribute__ ((__packed__)) GENERIC_MAPPING;
+
+/*
+ * The predefined ACE type structures are as defined below.
+ */
+
+/*
+ * ACCESS_ALLOWED_ACE, ACCESS_DENIED_ACE, SYSTEM_AUDIT_ACE, SYSTEM_ALARM_ACE
+ */
+typedef struct {
+/* 0 ACE_HEADER; -- Unfolded here as gcc doesn't like unnamed structs. */
+ ACE_TYPES type; /* Type of the ACE. */
+ ACE_FLAGS flags; /* Flags describing the ACE. */
+ le16 size; /* Size in bytes of the ACE. */
+/* 4*/ ACCESS_MASK mask; /* Access mask associated with the ACE. */
+
+/* 8*/ SID sid; /* The SID associated with the ACE. */
+} __attribute__ ((__packed__)) ACCESS_ALLOWED_ACE, ACCESS_DENIED_ACE,
+ SYSTEM_AUDIT_ACE, SYSTEM_ALARM_ACE;
+
+/*
+ * The object ACE flags (32-bit).
+ */
+enum {
+ ACE_OBJECT_TYPE_PRESENT = const_cpu_to_le32(1),
+ ACE_INHERITED_OBJECT_TYPE_PRESENT = const_cpu_to_le32(2),
+};
+
+typedef le32 OBJECT_ACE_FLAGS;
+
+typedef struct {
+/* 0 ACE_HEADER; -- Unfolded here as gcc doesn't like unnamed structs. */
+ ACE_TYPES type; /* Type of the ACE. */
+ ACE_FLAGS flags; /* Flags describing the ACE. */
+ le16 size; /* Size in bytes of the ACE. */
+/* 4*/ ACCESS_MASK mask; /* Access mask associated with the ACE. */
+
+/* 8*/ OBJECT_ACE_FLAGS object_flags; /* Flags describing the object ACE. */
+/* 12*/ GUID object_type;
+/* 28*/ GUID inherited_object_type;
+
+/* 44*/ SID sid; /* The SID associated with the ACE. */
+} __attribute__ ((__packed__)) ACCESS_ALLOWED_OBJECT_ACE,
+ ACCESS_DENIED_OBJECT_ACE,
+ SYSTEM_AUDIT_OBJECT_ACE,
+ SYSTEM_ALARM_OBJECT_ACE;
+
+/*
+ * An ACL is an access-control list (ACL).
+ * An ACL starts with an ACL header structure, which specifies the size of
+ * the ACL and the number of ACEs it contains. The ACL header is followed by
+ * zero or more access control entries (ACEs). The ACL as well as each ACE
+ * are aligned on 4-byte boundaries.
+ */
+typedef struct {
+ u8 revision; /* Revision of this ACL. */
+ u8 alignment1;
+ le16 size; /* Allocated space in bytes for ACL. Includes this
+ header, the ACEs and the remaining free space. */
+ le16 ace_count; /* Number of ACEs in the ACL. */
+ le16 alignment2;
+/* sizeof() = 8 bytes */
+} __attribute__ ((__packed__)) ACL;
+
+/*
+ * Current constants for ACLs.
+ */
+typedef enum {
+ /* Current revision. */
+ ACL_REVISION = 2,
+ ACL_REVISION_DS = 4,
+
+ /* History of revisions. */
+ ACL_REVISION1 = 1,
+ MIN_ACL_REVISION = 2,
+ ACL_REVISION2 = 2,
+ ACL_REVISION3 = 3,
+ ACL_REVISION4 = 4,
+ MAX_ACL_REVISION = 4,
+} ACL_CONSTANTS;
+
+/*
+ * The security descriptor control flags (16-bit).
+ *
+ * SE_OWNER_DEFAULTED - This boolean flag, when set, indicates that the SID
+ * pointed to by the Owner field was provided by a defaulting mechanism
+ * rather than explicitly provided by the original provider of the
+ * security descriptor. This may affect the treatment of the SID with
+ * respect to inheritence of an owner.
+ *
+ * SE_GROUP_DEFAULTED - This boolean flag, when set, indicates that the SID in
+ * the Group field was provided by a defaulting mechanism rather than
+ * explicitly provided by the original provider of the security
+ * descriptor. This may affect the treatment of the SID with respect to
+ * inheritence of a primary group.
+ *
+ * SE_DACL_PRESENT - This boolean flag, when set, indicates that the security
+ * descriptor contains a discretionary ACL. If this flag is set and the
+ * Dacl field of the SECURITY_DESCRIPTOR is null, then a null ACL is
+ * explicitly being specified.
+ *
+ * SE_DACL_DEFAULTED - This boolean flag, when set, indicates that the ACL
+ * pointed to by the Dacl field was provided by a defaulting mechanism
+ * rather than explicitly provided by the original provider of the
+ * security descriptor. This may affect the treatment of the ACL with
+ * respect to inheritence of an ACL. This flag is ignored if the
+ * DaclPresent flag is not set.
+ *
+ * SE_SACL_PRESENT - This boolean flag, when set, indicates that the security
+ * descriptor contains a system ACL pointed to by the Sacl field. If this
+ * flag is set and the Sacl field of the SECURITY_DESCRIPTOR is null, then
+ * an empty (but present) ACL is being specified.
+ *
+ * SE_SACL_DEFAULTED - This boolean flag, when set, indicates that the ACL
+ * pointed to by the Sacl field was provided by a defaulting mechanism
+ * rather than explicitly provided by the original provider of the
+ * security descriptor. This may affect the treatment of the ACL with
+ * respect to inheritence of an ACL. This flag is ignored if the
+ * SaclPresent flag is not set.
+ *
+ * SE_SELF_RELATIVE - This boolean flag, when set, indicates that the security
+ * descriptor is in self-relative form. In this form, all fields of the
+ * security descriptor are contiguous in memory and all pointer fields are
+ * expressed as offsets from the beginning of the security descriptor.
+ */
+enum {
+ SE_OWNER_DEFAULTED = const_cpu_to_le16(0x0001),
+ SE_GROUP_DEFAULTED = const_cpu_to_le16(0x0002),
+ SE_DACL_PRESENT = const_cpu_to_le16(0x0004),
+ SE_DACL_DEFAULTED = const_cpu_to_le16(0x0008),
+
+ SE_SACL_PRESENT = const_cpu_to_le16(0x0010),
+ SE_SACL_DEFAULTED = const_cpu_to_le16(0x0020),
+
+ SE_DACL_AUTO_INHERIT_REQ = const_cpu_to_le16(0x0100),
+ SE_SACL_AUTO_INHERIT_REQ = const_cpu_to_le16(0x0200),
+ SE_DACL_AUTO_INHERITED = const_cpu_to_le16(0x0400),
+ SE_SACL_AUTO_INHERITED = const_cpu_to_le16(0x0800),
+
+ SE_DACL_PROTECTED = const_cpu_to_le16(0x1000),
+ SE_SACL_PROTECTED = const_cpu_to_le16(0x2000),
+ SE_RM_CONTROL_VALID = const_cpu_to_le16(0x4000),
+ SE_SELF_RELATIVE = const_cpu_to_le16(0x8000)
+} __attribute__ ((__packed__));
+
+typedef le16 SECURITY_DESCRIPTOR_CONTROL;
+
+/*
+ * Self-relative security descriptor. Contains the owner and group SIDs as well
+ * as the sacl and dacl ACLs inside the security descriptor itself.
+ */
+typedef struct {
+ u8 revision; /* Revision level of the security descriptor. */
+ u8 alignment;
+ SECURITY_DESCRIPTOR_CONTROL control; /* Flags qualifying the type of
+ the descriptor as well as the following fields. */
+ le32 owner; /* Byte offset to a SID representing an object's
+ owner. If this is NULL, no owner SID is present in
+ the descriptor. */
+ le32 group; /* Byte offset to a SID representing an object's
+ primary group. If this is NULL, no primary group
+ SID is present in the descriptor. */
+ le32 sacl; /* Byte offset to a system ACL. Only valid, if
+ SE_SACL_PRESENT is set in the control field. If
+ SE_SACL_PRESENT is set but sacl is NULL, a NULL ACL
+ is specified. */
+ le32 dacl; /* Byte offset to a discretionary ACL. Only valid, if
+ SE_DACL_PRESENT is set in the control field. If
+ SE_DACL_PRESENT is set but dacl is NULL, a NULL ACL
+ (unconditionally granting access) is specified. */
+/* sizeof() = 0x14 bytes */
+} __attribute__ ((__packed__)) SECURITY_DESCRIPTOR_RELATIVE;
+
+/*
+ * Absolute security descriptor. Does not contain the owner and group SIDs, nor
+ * the sacl and dacl ACLs inside the security descriptor. Instead, it contains
+ * pointers to these structures in memory. Obviously, absolute security
+ * descriptors are only useful for in memory representations of security
+ * descriptors. On disk, a self-relative security descriptor is used.
+ */
+typedef struct {
+ u8 revision; /* Revision level of the security descriptor. */
+ u8 alignment;
+ SECURITY_DESCRIPTOR_CONTROL control; /* Flags qualifying the type of
+ the descriptor as well as the following fields. */
+ SID *owner; /* Points to a SID representing an object's owner. If
+ this is NULL, no owner SID is present in the
+ descriptor. */
+ SID *group; /* Points to a SID representing an object's primary
+ group. If this is NULL, no primary group SID is
+ present in the descriptor. */
+ ACL *sacl; /* Points to a system ACL. Only valid, if
+ SE_SACL_PRESENT is set in the control field. If
+ SE_SACL_PRESENT is set but sacl is NULL, a NULL ACL
+ is specified. */
+ ACL *dacl; /* Points to a discretionary ACL. Only valid, if
+ SE_DACL_PRESENT is set in the control field. If
+ SE_DACL_PRESENT is set but dacl is NULL, a NULL ACL
+ (unconditionally granting access) is specified. */
+} __attribute__ ((__packed__)) SECURITY_DESCRIPTOR;
+
+/*
+ * Current constants for security descriptors.
+ */
+typedef enum {
+ /* Current revision. */
+ SECURITY_DESCRIPTOR_REVISION = 1,
+ SECURITY_DESCRIPTOR_REVISION1 = 1,
+
+ /* The sizes of both the absolute and relative security descriptors is
+ the same as pointers, at least on ia32 architecture are 32-bit. */
+ SECURITY_DESCRIPTOR_MIN_LENGTH = sizeof(SECURITY_DESCRIPTOR),
+} SECURITY_DESCRIPTOR_CONSTANTS;
+
+/*
+ * Attribute: Security descriptor (0x50). A standard self-relative security
+ * descriptor.
+ *
+ * NOTE: Can be resident or non-resident.
+ * NOTE: Not used in NTFS 3.0+, as security descriptors are stored centrally
+ * in FILE_Secure and the correct descriptor is found using the security_id
+ * from the standard information attribute.
+ */
+typedef SECURITY_DESCRIPTOR_RELATIVE SECURITY_DESCRIPTOR_ATTR;
+
+/*
+ * On NTFS 3.0+, all security descriptors are stored in FILE_Secure. Only one
+ * referenced instance of each unique security descriptor is stored.
+ *
+ * FILE_Secure contains no unnamed data attribute, i.e. it has zero length. It
+ * does, however, contain two indexes ($SDH and $SII) as well as a named data
+ * stream ($SDS).
+ *
+ * Every unique security descriptor is assigned a unique security identifier
+ * (security_id, not to be confused with a SID). The security_id is unique for
+ * the NTFS volume and is used as an index into the $SII index, which maps
+ * security_ids to the security descriptor's storage location within the $SDS
+ * data attribute. The $SII index is sorted by ascending security_id.
+ *
+ * A simple hash is computed from each security descriptor. This hash is used
+ * as an index into the $SDH index, which maps security descriptor hashes to
+ * the security descriptor's storage location within the $SDS data attribute.
+ * The $SDH index is sorted by security descriptor hash and is stored in a B+
+ * tree. When searching $SDH (with the intent of determining whether or not a
+ * new security descriptor is already present in the $SDS data stream), if a
+ * matching hash is found, but the security descriptors do not match, the
+ * search in the $SDH index is continued, searching for a next matching hash.
+ *
+ * When a precise match is found, the security_id coresponding to the security
+ * descriptor in the $SDS attribute is read from the found $SDH index entry and
+ * is stored in the $STANDARD_INFORMATION attribute of the file/directory to
+ * which the security descriptor is being applied. The $STANDARD_INFORMATION
+ * attribute is present in all base mft records (i.e. in all files and
+ * directories).
+ *
+ * If a match is not found, the security descriptor is assigned a new unique
+ * security_id and is added to the $SDS data attribute. Then, entries
+ * referencing the this security descriptor in the $SDS data attribute are
+ * added to the $SDH and $SII indexes.
+ *
+ * Note: Entries are never deleted from FILE_Secure, even if nothing
+ * references an entry any more.
+ */
+
+/*
+ * This header precedes each security descriptor in the $SDS data stream.
+ * This is also the index entry data part of both the $SII and $SDH indexes.
+ */
+typedef struct {
+ le32 hash; /* Hash of the security descriptor. */
+ le32 security_id; /* The security_id assigned to the descriptor. */
+ le64 offset; /* Byte offset of this entry in the $SDS stream. */
+ le32 length; /* Size in bytes of this entry in $SDS stream. */
+} __attribute__ ((__packed__)) SECURITY_DESCRIPTOR_HEADER;
+
+/*
+ * The $SDS data stream contains the security descriptors, aligned on 16-byte
+ * boundaries, sorted by security_id in a B+ tree. Security descriptors cannot
+ * cross 256kib boundaries (this restriction is imposed by the Windows cache
+ * manager). Each security descriptor is contained in a SDS_ENTRY structure.
+ * Also, each security descriptor is stored twice in the $SDS stream with a
+ * fixed offset of 0x40000 bytes (256kib, the Windows cache manager's max size)
+ * between them; i.e. if a SDS_ENTRY specifies an offset of 0x51d0, then the
+ * the first copy of the security descriptor will be at offset 0x51d0 in the
+ * $SDS data stream and the second copy will be at offset 0x451d0.
+ */
+typedef struct {
+/*Ofs*/
+/* 0 SECURITY_DESCRIPTOR_HEADER; -- Unfolded here as gcc doesn't like
+ unnamed structs. */
+ le32 hash; /* Hash of the security descriptor. */
+ le32 security_id; /* The security_id assigned to the descriptor. */
+ le64 offset; /* Byte offset of this entry in the $SDS stream. */
+ le32 length; /* Size in bytes of this entry in $SDS stream. */
+/* 20*/ SECURITY_DESCRIPTOR_RELATIVE sid; /* The self-relative security
+ descriptor. */
+} __attribute__ ((__packed__)) SDS_ENTRY;
+
+/*
+ * The index entry key used in the $SII index. The collation type is
+ * COLLATION_NTOFS_ULONG.
+ */
+typedef struct {
+ le32 security_id; /* The security_id assigned to the descriptor. */
+} __attribute__ ((__packed__)) SII_INDEX_KEY;
+
+/*
+ * The index entry key used in the $SDH index. The keys are sorted first by
+ * hash and then by security_id. The collation rule is
+ * COLLATION_NTOFS_SECURITY_HASH.
+ */
+typedef struct {
+ le32 hash; /* Hash of the security descriptor. */
+ le32 security_id; /* The security_id assigned to the descriptor. */
+} __attribute__ ((__packed__)) SDH_INDEX_KEY;
+
+/*
+ * Attribute: Volume name (0x60).
+ *
+ * NOTE: Always resident.
+ * NOTE: Present only in FILE_Volume.
+ */
+typedef struct {
+ ntfschar name[0]; /* The name of the volume in Unicode. */
+} __attribute__ ((__packed__)) VOLUME_NAME;
+
+/*
+ * Possible flags for the volume (16-bit).
+ */
+enum {
+ VOLUME_IS_DIRTY = const_cpu_to_le16(0x0001),
+ VOLUME_RESIZE_LOG_FILE = const_cpu_to_le16(0x0002),
+ VOLUME_UPGRADE_ON_MOUNT = const_cpu_to_le16(0x0004),
+ VOLUME_MOUNTED_ON_NT4 = const_cpu_to_le16(0x0008),
+
+ VOLUME_DELETE_USN_UNDERWAY = const_cpu_to_le16(0x0010),
+ VOLUME_REPAIR_OBJECT_ID = const_cpu_to_le16(0x0020),
+
+ VOLUME_MODIFIED_BY_CHKDSK = const_cpu_to_le16(0x8000),
+
+ VOLUME_FLAGS_MASK = const_cpu_to_le16(0x803f),
+
+ /* To make our life easier when checking if we must mount read-only. */
+ VOLUME_MUST_MOUNT_RO_MASK = const_cpu_to_le16(0x8037),
+} __attribute__ ((__packed__));
+
+typedef le16 VOLUME_FLAGS;
+
+/*
+ * Attribute: Volume information (0x70).
+ *
+ * NOTE: Always resident.
+ * NOTE: Present only in FILE_Volume.
+ * NOTE: Windows 2000 uses NTFS 3.0 while Windows NT4 service pack 6a uses
+ * NTFS 1.2. I haven't personally seen other values yet.
+ */
+typedef struct {
+ le64 reserved; /* Not used (yet?). */
+ u8 major_ver; /* Major version of the ntfs format. */
+ u8 minor_ver; /* Minor version of the ntfs format. */
+ VOLUME_FLAGS flags; /* Bit array of VOLUME_* flags. */
+} __attribute__ ((__packed__)) VOLUME_INFORMATION;
+
+/*
+ * Attribute: Data attribute (0x80).
+ *
+ * NOTE: Can be resident or non-resident.
+ *
+ * Data contents of a file (i.e. the unnamed stream) or of a named stream.
+ */
+typedef struct {
+ u8 data[0]; /* The file's data contents. */
+} __attribute__ ((__packed__)) DATA_ATTR;
+
+/*
+ * Index header flags (8-bit).
+ */
+enum {
+ /*
+ * When index header is in an index root attribute:
+ */
+ SMALL_INDEX = 0, /* The index is small enough to fit inside the index
+ root attribute and there is no index allocation
+ attribute present. */
+ LARGE_INDEX = 1, /* The index is too large to fit in the index root
+ attribute and/or an index allocation attribute is
+ present. */
+ /*
+ * When index header is in an index block, i.e. is part of index
+ * allocation attribute:
+ */
+ LEAF_NODE = 0, /* This is a leaf node, i.e. there are no more nodes
+ branching off it. */
+ INDEX_NODE = 1, /* This node indexes other nodes, i.e. it is not a leaf
+ node. */
+ NODE_MASK = 1, /* Mask for accessing the *_NODE bits. */
+} __attribute__ ((__packed__));
+
+typedef u8 INDEX_HEADER_FLAGS;
+
+/*
+ * This is the header for indexes, describing the INDEX_ENTRY records, which
+ * follow the INDEX_HEADER. Together the index header and the index entries
+ * make up a complete index.
+ *
+ * IMPORTANT NOTE: The offset, length and size structure members are counted
+ * relative to the start of the index header structure and not relative to the
+ * start of the index root or index allocation structures themselves.
+ */
+typedef struct {
+ le32 entries_offset; /* Byte offset to first INDEX_ENTRY
+ aligned to 8-byte boundary. */
+ le32 index_length; /* Data size of the index in bytes,
+ i.e. bytes used from allocated
+ size, aligned to 8-byte boundary. */
+ le32 allocated_size; /* Byte size of this index (block),
+ multiple of 8 bytes. */
+ /* NOTE: For the index root attribute, the above two numbers are always
+ equal, as the attribute is resident and it is resized as needed. In
+ the case of the index allocation attribute the attribute is not
+ resident and hence the allocated_size is a fixed value and must
+ equal the index_block_size specified by the INDEX_ROOT attribute
+ corresponding to the INDEX_ALLOCATION attribute this INDEX_BLOCK
+ belongs to. */
+ INDEX_HEADER_FLAGS flags; /* Bit field of INDEX_HEADER_FLAGS. */
+ u8 reserved[3]; /* Reserved/align to 8-byte boundary. */
+} __attribute__ ((__packed__)) INDEX_HEADER;
+
+/*
+ * Attribute: Index root (0x90).
+ *
+ * NOTE: Always resident.
+ *
+ * This is followed by a sequence of index entries (INDEX_ENTRY structures)
+ * as described by the index header.
+ *
+ * When a directory is small enough to fit inside the index root then this
+ * is the only attribute describing the directory. When the directory is too
+ * large to fit in the index root, on the other hand, two aditional attributes
+ * are present: an index allocation attribute, containing sub-nodes of the B+
+ * directory tree (see below), and a bitmap attribute, describing which virtual
+ * cluster numbers (vcns) in the index allocation attribute are in use by an
+ * index block.
+ *
+ * NOTE: The root directory (FILE_root) contains an entry for itself. Other
+ * dircetories do not contain entries for themselves, though.
+ */
+typedef struct {
+ ATTR_TYPE type; /* Type of the indexed attribute. Is
+ $FILE_NAME for directories, zero
+ for view indexes. No other values
+ allowed. */
+ COLLATION_RULE collation_rule; /* Collation rule used to sort the
+ index entries. If type is $FILE_NAME,
+ this must be COLLATION_FILE_NAME. */
+ le32 index_block_size; /* Size of each index block in bytes (in
+ the index allocation attribute). */
+ u8 clusters_per_index_block; /* Cluster size of each index block (in
+ the index allocation attribute), when
+ an index block is >= than a cluster,
+ otherwise this will be the log of
+ the size (like how the encoding of
+ the mft record size and the index
+ record size found in the boot sector
+ work). Has to be a power of 2. */
+ u8 reserved[3]; /* Reserved/align to 8-byte boundary. */
+ INDEX_HEADER index; /* Index header describing the
+ following index entries. */
+} __attribute__ ((__packed__)) INDEX_ROOT;
+
+/*
+ * Attribute: Index allocation (0xa0).
+ *
+ * NOTE: Always non-resident (doesn't make sense to be resident anyway!).
+ *
+ * This is an array of index blocks. Each index block starts with an
+ * INDEX_BLOCK structure containing an index header, followed by a sequence of
+ * index entries (INDEX_ENTRY structures), as described by the INDEX_HEADER.
+ */
+typedef struct {
+/* 0 NTFS_RECORD; -- Unfolded here as gcc doesn't like unnamed structs. */
+ NTFS_RECORD_TYPE magic; /* Magic is "INDX". */
+ le16 usa_ofs; /* See NTFS_RECORD definition. */
+ le16 usa_count; /* See NTFS_RECORD definition. */
+
+/* 8*/ sle64 lsn; /* $LogFile sequence number of the last
+ modification of this index block. */
+/* 16*/ leVCN index_block_vcn; /* Virtual cluster number of the index block.
+ If the cluster_size on the volume is <= the
+ index_block_size of the directory,
+ index_block_vcn counts in units of clusters,
+ and in units of sectors otherwise. */
+/* 24*/ INDEX_HEADER index; /* Describes the following index entries. */
+/* sizeof()= 40 (0x28) bytes */
+/*
+ * When creating the index block, we place the update sequence array at this
+ * offset, i.e. before we start with the index entries. This also makes sense,
+ * otherwise we could run into problems with the update sequence array
+ * containing in itself the last two bytes of a sector which would mean that
+ * multi sector transfer protection wouldn't work. As you can't protect data
+ * by overwriting it since you then can't get it back...
+ * When reading use the data from the ntfs record header.
+ */
+} __attribute__ ((__packed__)) INDEX_BLOCK;
+
+typedef INDEX_BLOCK INDEX_ALLOCATION;
+
+/*
+ * The system file FILE_Extend/$Reparse contains an index named $R listing
+ * all reparse points on the volume. The index entry keys are as defined
+ * below. Note, that there is no index data associated with the index entries.
+ *
+ * The index entries are sorted by the index key file_id. The collation rule is
+ * COLLATION_NTOFS_ULONGS. FIXME: Verify whether the reparse_tag is not the
+ * primary key / is not a key at all. (AIA)
+ */
+typedef struct {
+ le32 reparse_tag; /* Reparse point type (inc. flags). */
+ leMFT_REF file_id; /* Mft record of the file containing the
+ reparse point attribute. */
+} __attribute__ ((__packed__)) REPARSE_INDEX_KEY;
+
+/*
+ * Quota flags (32-bit).
+ *
+ * The user quota flags. Names explain meaning.
+ */
+enum {
+ QUOTA_FLAG_DEFAULT_LIMITS = const_cpu_to_le32(0x00000001),
+ QUOTA_FLAG_LIMIT_REACHED = const_cpu_to_le32(0x00000002),
+ QUOTA_FLAG_ID_DELETED = const_cpu_to_le32(0x00000004),
+
+ QUOTA_FLAG_USER_MASK = const_cpu_to_le32(0x00000007),
+ /* This is a bit mask for the user quota flags. */
+
+ /*
+ * These flags are only present in the quota defaults index entry, i.e.
+ * in the entry where owner_id = QUOTA_DEFAULTS_ID.
+ */
+ QUOTA_FLAG_TRACKING_ENABLED = const_cpu_to_le32(0x00000010),
+ QUOTA_FLAG_ENFORCEMENT_ENABLED = const_cpu_to_le32(0x00000020),
+ QUOTA_FLAG_TRACKING_REQUESTED = const_cpu_to_le32(0x00000040),
+ QUOTA_FLAG_LOG_THRESHOLD = const_cpu_to_le32(0x00000080),
+
+ QUOTA_FLAG_LOG_LIMIT = const_cpu_to_le32(0x00000100),
+ QUOTA_FLAG_OUT_OF_DATE = const_cpu_to_le32(0x00000200),
+ QUOTA_FLAG_CORRUPT = const_cpu_to_le32(0x00000400),
+ QUOTA_FLAG_PENDING_DELETES = const_cpu_to_le32(0x00000800),
+};
+
+typedef le32 QUOTA_FLAGS;
+
+/*
+ * The system file FILE_Extend/$Quota contains two indexes $O and $Q. Quotas
+ * are on a per volume and per user basis.
+ *
+ * The $Q index contains one entry for each existing user_id on the volume. The
+ * index key is the user_id of the user/group owning this quota control entry,
+ * i.e. the key is the owner_id. The user_id of the owner of a file, i.e. the
+ * owner_id, is found in the standard information attribute. The collation rule
+ * for $Q is COLLATION_NTOFS_ULONG.
+ *
+ * The $O index contains one entry for each user/group who has been assigned
+ * a quota on that volume. The index key holds the SID of the user_id the
+ * entry belongs to, i.e. the owner_id. The collation rule for $O is
+ * COLLATION_NTOFS_SID.
+ *
+ * The $O index entry data is the user_id of the user corresponding to the SID.
+ * This user_id is used as an index into $Q to find the quota control entry
+ * associated with the SID.
+ *
+ * The $Q index entry data is the quota control entry and is defined below.
+ */
+typedef struct {
+ le32 version; /* Currently equals 2. */
+ QUOTA_FLAGS flags; /* Flags describing this quota entry. */
+ le64 bytes_used; /* How many bytes of the quota are in use. */
+ sle64 change_time; /* Last time this quota entry was changed. */
+ sle64 threshold; /* Soft quota (-1 if not limited). */
+ sle64 limit; /* Hard quota (-1 if not limited). */
+ sle64 exceeded_time; /* How long the soft quota has been exceeded. */
+ SID sid; /* The SID of the user/object associated with
+ this quota entry. Equals zero for the quota
+ defaults entry (and in fact on a WinXP
+ volume, it is not present at all). */
+} __attribute__ ((__packed__)) QUOTA_CONTROL_ENTRY;
+
+/*
+ * Predefined owner_id values (32-bit).
+ */
+enum {
+ QUOTA_INVALID_ID = const_cpu_to_le32(0x00000000),
+ QUOTA_DEFAULTS_ID = const_cpu_to_le32(0x00000001),
+ QUOTA_FIRST_USER_ID = const_cpu_to_le32(0x00000100),
+};
+
+/*
+ * Current constants for quota control entries.
+ */
+typedef enum {
+ /* Current version. */
+ QUOTA_VERSION = 2,
+} QUOTA_CONTROL_ENTRY_CONSTANTS;
+
+/*
+ * Index entry flags (16-bit).
+ */
+enum {
+ INDEX_ENTRY_NODE = const_cpu_to_le16(1), /* This entry contains a
+ sub-node, i.e. a reference to an index block in form of
+ a virtual cluster number (see below). */
+ INDEX_ENTRY_END = const_cpu_to_le16(2), /* This signifies the last
+ entry in an index block. The index entry does not
+ represent a file but it can point to a sub-node. */
+
+ INDEX_ENTRY_SPACE_FILLER = const_cpu_to_le16(0xffff), /* gcc: Force
+ enum bit width to 16-bit. */
+} __attribute__ ((__packed__));
+
+typedef le16 INDEX_ENTRY_FLAGS;
+
+/*
+ * This the index entry header (see below).
+ */
+typedef struct {
+/* 0*/ union {
+ struct { /* Only valid when INDEX_ENTRY_END is not set. */
+ leMFT_REF indexed_file; /* The mft reference of the file
+ described by this index
+ entry. Used for directory
+ indexes. */
+ } __attribute__ ((__packed__)) dir;
+ struct { /* Used for views/indexes to find the entry's data. */
+ le16 data_offset; /* Data byte offset from this
+ INDEX_ENTRY. Follows the
+ index key. */
+ le16 data_length; /* Data length in bytes. */
+ le32 reservedV; /* Reserved (zero). */
+ } __attribute__ ((__packed__)) vi;
+ } __attribute__ ((__packed__)) data;
+/* 8*/ le16 length; /* Byte size of this index entry, multiple of
+ 8-bytes. */
+/* 10*/ le16 key_length; /* Byte size of the key value, which is in the
+ index entry. It follows field reserved. Not
+ multiple of 8-bytes. */
+/* 12*/ INDEX_ENTRY_FLAGS flags; /* Bit field of INDEX_ENTRY_* flags. */
+/* 14*/ le16 reserved; /* Reserved/align to 8-byte boundary. */
+/* sizeof() = 16 bytes */
+} __attribute__ ((__packed__)) INDEX_ENTRY_HEADER;
+
+/*
+ * This is an index entry. A sequence of such entries follows each INDEX_HEADER
+ * structure. Together they make up a complete index. The index follows either
+ * an index root attribute or an index allocation attribute.
+ *
+ * NOTE: Before NTFS 3.0 only filename attributes were indexed.
+ */
+typedef struct {
+/*Ofs*/
+/* 0 INDEX_ENTRY_HEADER; -- Unfolded here as gcc dislikes unnamed structs. */
+ union {
+ struct { /* Only valid when INDEX_ENTRY_END is not set. */
+ leMFT_REF indexed_file; /* The mft reference of the file
+ described by this index
+ entry. Used for directory
+ indexes. */
+ } __attribute__ ((__packed__)) dir;
+ struct { /* Used for views/indexes to find the entry's data. */
+ le16 data_offset; /* Data byte offset from this
+ INDEX_ENTRY. Follows the
+ index key. */
+ le16 data_length; /* Data length in bytes. */
+ le32 reservedV; /* Reserved (zero). */
+ } __attribute__ ((__packed__)) vi;
+ } __attribute__ ((__packed__)) data;
+ le16 length; /* Byte size of this index entry, multiple of
+ 8-bytes. */
+ le16 key_length; /* Byte size of the key value, which is in the
+ index entry. It follows field reserved. Not
+ multiple of 8-bytes. */
+ INDEX_ENTRY_FLAGS flags; /* Bit field of INDEX_ENTRY_* flags. */
+ le16 reserved; /* Reserved/align to 8-byte boundary. */
+
+/* 16*/ union { /* The key of the indexed attribute. NOTE: Only present
+ if INDEX_ENTRY_END bit in flags is not set. NOTE: On
+ NTFS versions before 3.0 the only valid key is the
+ FILE_NAME_ATTR. On NTFS 3.0+ the following
+ additional index keys are defined: */
+ FILE_NAME_ATTR file_name;/* $I30 index in directories. */
+ SII_INDEX_KEY sii; /* $SII index in $Secure. */
+ SDH_INDEX_KEY sdh; /* $SDH index in $Secure. */
+ GUID object_id; /* $O index in FILE_Extend/$ObjId: The
+ object_id of the mft record found in
+ the data part of the index. */
+ REPARSE_INDEX_KEY reparse; /* $R index in
+ FILE_Extend/$Reparse. */
+ SID sid; /* $O index in FILE_Extend/$Quota:
+ SID of the owner of the user_id. */
+ le32 owner_id; /* $Q index in FILE_Extend/$Quota:
+ user_id of the owner of the quota
+ control entry in the data part of
+ the index. */
+ } __attribute__ ((__packed__)) key;
+ /* The (optional) index data is inserted here when creating. */
+ // leVCN vcn; /* If INDEX_ENTRY_NODE bit in flags is set, the last
+ // eight bytes of this index entry contain the virtual
+ // cluster number of the index block that holds the
+ // entries immediately preceding the current entry (the
+ // vcn references the corresponding cluster in the data
+ // of the non-resident index allocation attribute). If
+ // the key_length is zero, then the vcn immediately
+ // follows the INDEX_ENTRY_HEADER. Regardless of
+ // key_length, the address of the 8-byte boundary
+ // alligned vcn of INDEX_ENTRY{_HEADER} *ie is given by
+ // (char*)ie + le16_to_cpu(ie*)->length) - sizeof(VCN),
+ // where sizeof(VCN) can be hardcoded as 8 if wanted. */
+} __attribute__ ((__packed__)) INDEX_ENTRY;
+
+/*
+ * Attribute: Bitmap (0xb0).
+ *
+ * Contains an array of bits (aka a bitfield).
+ *
+ * When used in conjunction with the index allocation attribute, each bit
+ * corresponds to one index block within the index allocation attribute. Thus
+ * the number of bits in the bitmap * index block size / cluster size is the
+ * number of clusters in the index allocation attribute.
+ */
+typedef struct {
+ u8 bitmap[0]; /* Array of bits. */
+} __attribute__ ((__packed__)) BITMAP_ATTR;
+
+/*
+ * The reparse point tag defines the type of the reparse point. It also
+ * includes several flags, which further describe the reparse point.
+ *
+ * The reparse point tag is an unsigned 32-bit value divided in three parts:
+ *
+ * 1. The least significant 16 bits (i.e. bits 0 to 15) specifiy the type of
+ * the reparse point.
+ * 2. The 13 bits after this (i.e. bits 16 to 28) are reserved for future use.
+ * 3. The most significant three bits are flags describing the reparse point.
+ * They are defined as follows:
+ * bit 29: Name surrogate bit. If set, the filename is an alias for
+ * another object in the system.
+ * bit 30: High-latency bit. If set, accessing the first byte of data will
+ * be slow. (E.g. the data is stored on a tape drive.)
+ * bit 31: Microsoft bit. If set, the tag is owned by Microsoft. User
+ * defined tags have to use zero here.
+ *
+ * These are the predefined reparse point tags:
+ */
+enum {
+ IO_REPARSE_TAG_IS_ALIAS = const_cpu_to_le32(0x20000000),
+ IO_REPARSE_TAG_IS_HIGH_LATENCY = const_cpu_to_le32(0x40000000),
+ IO_REPARSE_TAG_IS_MICROSOFT = const_cpu_to_le32(0x80000000),
+
+ IO_REPARSE_TAG_RESERVED_ZERO = const_cpu_to_le32(0x00000000),
+ IO_REPARSE_TAG_RESERVED_ONE = const_cpu_to_le32(0x00000001),
+ IO_REPARSE_TAG_RESERVED_RANGE = const_cpu_to_le32(0x00000001),
+
+ IO_REPARSE_TAG_NSS = const_cpu_to_le32(0x68000005),
+ IO_REPARSE_TAG_NSS_RECOVER = const_cpu_to_le32(0x68000006),
+ IO_REPARSE_TAG_SIS = const_cpu_to_le32(0x68000007),
+ IO_REPARSE_TAG_DFS = const_cpu_to_le32(0x68000008),
+
+ IO_REPARSE_TAG_MOUNT_POINT = const_cpu_to_le32(0x88000003),
+
+ IO_REPARSE_TAG_HSM = const_cpu_to_le32(0xa8000004),
+
+ IO_REPARSE_TAG_SYMBOLIC_LINK = const_cpu_to_le32(0xe8000000),
+
+ IO_REPARSE_TAG_VALID_VALUES = const_cpu_to_le32(0xe000ffff),
+};
+
+/*
+ * Attribute: Reparse point (0xc0).
+ *
+ * NOTE: Can be resident or non-resident.
+ */
+typedef struct {
+ le32 reparse_tag; /* Reparse point type (inc. flags). */
+ le16 reparse_data_length; /* Byte size of reparse data. */
+ le16 reserved; /* Align to 8-byte boundary. */
+ u8 reparse_data[0]; /* Meaning depends on reparse_tag. */
+} __attribute__ ((__packed__)) REPARSE_POINT;
+
+/*
+ * Attribute: Extended attribute (EA) information (0xd0).
+ *
+ * NOTE: Always resident. (Is this true???)
+ */
+typedef struct {
+ le16 ea_length; /* Byte size of the packed extended
+ attributes. */
+ le16 need_ea_count; /* The number of extended attributes which have
+ the NEED_EA bit set. */
+ le32 ea_query_length; /* Byte size of the buffer required to query
+ the extended attributes when calling
+ ZwQueryEaFile() in Windows NT/2k. I.e. the
+ byte size of the unpacked extended
+ attributes. */
+} __attribute__ ((__packed__)) EA_INFORMATION;
+
+/*
+ * Extended attribute flags (8-bit).
+ */
+enum {
+ NEED_EA = 0x80
+} __attribute__ ((__packed__));
+
+typedef u8 EA_FLAGS;
+
+/*
+ * Attribute: Extended attribute (EA) (0xe0).
+ *
+ * NOTE: Always non-resident. (Is this true?)
+ *
+ * Like the attribute list and the index buffer list, the EA attribute value is
+ * a sequence of EA_ATTR variable length records.
+ *
+ * FIXME: It appears weird that the EA name is not unicode. Is it true?
+ */
+typedef struct {
+ le32 next_entry_offset; /* Offset to the next EA_ATTR. */
+ EA_FLAGS flags; /* Flags describing the EA. */
+ u8 ea_name_length; /* Length of the name of the EA in bytes. */
+ le16 ea_value_length; /* Byte size of the EA's value. */
+ u8 ea_name[0]; /* Name of the EA. */
+ u8 ea_value[0]; /* The value of the EA. Immediately follows
+ the name. */
+} __attribute__ ((__packed__)) EA_ATTR;
+
+/*
+ * Attribute: Property set (0xf0).
+ *
+ * Intended to support Native Structure Storage (NSS) - a feature removed from
+ * NTFS 3.0 during beta testing.
+ */
+typedef struct {
+ /* Irrelevant as feature unused. */
+} __attribute__ ((__packed__)) PROPERTY_SET;
+
+/*
+ * Attribute: Logged utility stream (0x100).
+ *
+ * NOTE: Can be resident or non-resident.
+ *
+ * Operations on this attribute are logged to the journal ($LogFile) like
+ * normal metadata changes.
+ *
+ * Used by the Encrypting File System (EFS). All encrypted files have this
+ * attribute with the name $EFS.
+ */
+typedef struct {
+ /* Can be anything the creator chooses. */
+ /* EFS uses it as follows: */
+ // FIXME: Type this info, verifying it along the way. (AIA)
+} __attribute__ ((__packed__)) LOGGED_UTILITY_STREAM, EFS_ATTR;
+
+#endif /* _LINUX_NTFS_LAYOUT_H */