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Message-ID: <45515008-e4a9-26e3-3ce4-026bfacf7d53@harmstone.com>
Date: Fri, 22 Jan 2021 14:55:30 +0000
From: Mark Harmstone <mark@...mstone.com>
To: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
linux-fsdevel@...r.kernel.org
Cc: viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org,
pali@...nel.org, dsterba@...e.cz, aaptel@...e.com,
willy@...radead.org, rdunlap@...radead.org, joe@...ches.com,
nborisov@...e.com, linux-ntfs-dev@...ts.sourceforge.net,
anton@...era.com, dan.carpenter@...cle.com, hch@....de,
ebiggers@...nel.org, andy.lavr@...il.com
Subject: Re: [PATCH v18 01/10] fs/ntfs3: Add headers and misc files
Hi Konstantin,
Shouldn't upcase_unicode_char be using the NTFS pseudo-file $UpCase? That way you should also be covered for other bicameral alphabets.
Mark
On 22/1/21 2:01 pm, Konstantin Komarov wrote:
> This adds headers and misc files
>
> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
> ---
> fs/ntfs3/debug.h | 62 +++
> fs/ntfs3/ntfs.h | 1238 ++++++++++++++++++++++++++++++++++++++++++++
> fs/ntfs3/ntfs_fs.h | 1056 +++++++++++++++++++++++++++++++++++++
> fs/ntfs3/upcase.c | 100 ++++
> 4 files changed, 2456 insertions(+)
> create mode 100644 fs/ntfs3/debug.h
> create mode 100644 fs/ntfs3/ntfs.h
> create mode 100644 fs/ntfs3/ntfs_fs.h
> create mode 100644 fs/ntfs3/upcase.c
>
> diff --git a/fs/ntfs3/debug.h b/fs/ntfs3/debug.h
> new file mode 100644
> index 000000000000..41893421081a
> --- /dev/null
> +++ b/fs/ntfs3/debug.h
> @@ -0,0 +1,62 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + *
> + * Copyright (C) 2019-2020 Paragon Software GmbH, All rights reserved.
> + *
> + * useful functions for debuging
> + */
> +
> +// clang-format off
> +#ifndef Add2Ptr
> +#define Add2Ptr(P, I) ((void *)((u8 *)(P) + (I)))
> +#define PtrOffset(B, O) ((size_t)((size_t)(O) - (size_t)(B)))
> +#endif
> +
> +#define QuadAlign(n) (((n) + 7u) & (~7u))
> +#define IsQuadAligned(n) (!((size_t)(n)&7u))
> +#define Quad2Align(n) (((n) + 15u) & (~15u))
> +#define IsQuad2Aligned(n) (!((size_t)(n)&15u))
> +#define Quad4Align(n) (((n) + 31u) & (~31u))
> +#define IsSizeTAligned(n) (!((size_t)(n) & (sizeof(size_t) - 1)))
> +#define DwordAlign(n) (((n) + 3u) & (~3u))
> +#define IsDwordAligned(n) (!((size_t)(n)&3u))
> +#define WordAlign(n) (((n) + 1u) & (~1u))
> +#define IsWordAligned(n) (!((size_t)(n)&1u))
> +
> +#ifdef CONFIG_PRINTK
> +__printf(2, 3)
> +void ntfs_printk(const struct super_block *sb, const char *fmt, ...);
> +__printf(2, 3)
> +void ntfs_inode_printk(struct inode *inode, const char *fmt, ...);
> +#else
> +static inline __printf(2, 3)
> +void ntfs_printk(const struct super_block *sb, const char *fmt, ...)
> +{
> +}
> +
> +static inline __printf(2, 3)
> +void ntfs_inode_printk(struct inode *inode, const char *fmt, ...)
> +{
> +}
> +#endif
> +
> +/*
> + * Logging macros ( thanks Joe Perches <joe@...ches.com> for implementation )
> + */
> +
> +#define ntfs_err(sb, fmt, ...) ntfs_printk(sb, KERN_ERR fmt, ##__VA_ARGS__)
> +#define ntfs_warn(sb, fmt, ...) ntfs_printk(sb, KERN_WARNING fmt, ##__VA_ARGS__)
> +#define ntfs_info(sb, fmt, ...) ntfs_printk(sb, KERN_INFO fmt, ##__VA_ARGS__)
> +#define ntfs_notice(sb, fmt, ...) \
> + ntfs_printk(sb, KERN_NOTICE fmt, ##__VA_ARGS__)
> +
> +#define ntfs_inode_err(inode, fmt, ...) \
> + ntfs_inode_printk(inode, KERN_ERR fmt, ##__VA_ARGS__)
> +#define ntfs_inode_warn(inode, fmt, ...) \
> + ntfs_inode_printk(inode, KERN_WARNING fmt, ##__VA_ARGS__)
> +
> +#define ntfs_malloc(s) kmalloc(s, GFP_NOFS)
> +#define ntfs_zalloc(s) kzalloc(s, GFP_NOFS)
> +#define ntfs_free(p) kfree(p)
> +#define ntfs_memdup(src, len) kmemdup(src, len, GFP_NOFS)
> +// clang-format on
> diff --git a/fs/ntfs3/ntfs.h b/fs/ntfs3/ntfs.h
> new file mode 100644
> index 000000000000..19aac05ff3d1
> --- /dev/null
> +++ b/fs/ntfs3/ntfs.h
> @@ -0,0 +1,1238 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + *
> + * Copyright (C) 2019-2020 Paragon Software GmbH, All rights reserved.
> + *
> + * on-disk ntfs structs
> + */
> +
> +// clang-format off
> +
> +/* TODO:
> + * - Check 4K mft record and 512 bytes cluster
> + */
> +
> +/*
> + * Activate this define to use binary search in indexes
> + */
> +#define NTFS3_INDEX_BINARY_SEARCH
> +
> +/*
> + * Check each run for marked clusters
> + */
> +#define NTFS3_CHECK_FREE_CLST
> +
> +#define NTFS_NAME_LEN 255
> +
> +/*
> + * ntfs.sys used 500 maximum links
> + * on-disk struct allows up to 0xffff
> + */
> +#define NTFS_LINK_MAX 0x400
> +//#define NTFS_LINK_MAX 0xffff
> +
> +/*
> + * Activate to use 64 bit clusters instead of 32 bits in ntfs.sys
> + * Logical and virtual cluster number
> + * If needed, may be redefined to use 64 bit value
> + */
> +//#define NTFS3_64BIT_CLUSTER
> +
> +#define NTFS_LZNT_MAX_CLUSTER 4096
> +#define NTFS_LZNT_CUNIT 4
> +#define NTFS_LZNT_CLUSTERS (1u<<NTFS_LZNT_CUNIT)
> +
> +struct GUID {
> + __le32 Data1;
> + __le16 Data2;
> + __le16 Data3;
> + u8 Data4[8];
> +};
> +
> +/*
> + * this struct repeats layout of ATTR_FILE_NAME
> + * at offset 0x40
> + * it used to store global constants NAME_MFT/NAME_MIRROR...
> + * most constant names are shorter than 10
> + */
> +struct cpu_str {
> + u8 len;
> + u8 unused;
> + u16 name[10];
> +};
> +
> +struct le_str {
> + u8 len;
> + u8 unused;
> + __le16 name[1];
> +};
> +
> +static_assert(SECTOR_SHIFT == 9);
> +
> +#ifdef NTFS3_64BIT_CLUSTER
> +typedef u64 CLST;
> +static_assert(sizeof(size_t) == 8);
> +#else
> +typedef u32 CLST;
> +#endif
> +
> +#define SPARSE_LCN64 ((u64)-1)
> +#define SPARSE_LCN ((CLST)-1)
> +#define RESIDENT_LCN ((CLST)-2)
> +#define COMPRESSED_LCN ((CLST)-3)
> +
> +#define COMPRESSION_UNIT 4
> +#define COMPRESS_MAX_CLUSTER 0x1000
> +#define MFT_INCREASE_CHUNK 1024
> +
> +enum RECORD_NUM {
> + MFT_REC_MFT = 0,
> + MFT_REC_MIRR = 1,
> + MFT_REC_LOG = 2,
> + MFT_REC_VOL = 3,
> + MFT_REC_ATTR = 4,
> + MFT_REC_ROOT = 5,
> + MFT_REC_BITMAP = 6,
> + MFT_REC_BOOT = 7,
> + MFT_REC_BADCLUST = 8,
> + //MFT_REC_QUOTA = 9,
> + MFT_REC_SECURE = 9, // NTFS 3.0
> + MFT_REC_UPCASE = 10,
> + MFT_REC_EXTEND = 11, // NTFS 3.0
> + MFT_REC_RESERVED = 11,
> + MFT_REC_FREE = 16,
> + MFT_REC_USER = 24,
> +};
> +
> +enum ATTR_TYPE {
> + ATTR_ZERO = cpu_to_le32(0x00),
> + ATTR_STD = cpu_to_le32(0x10),
> + ATTR_LIST = cpu_to_le32(0x20),
> + ATTR_NAME = cpu_to_le32(0x30),
> + // ATTR_VOLUME_VERSION on Nt4
> + ATTR_ID = cpu_to_le32(0x40),
> + ATTR_SECURE = cpu_to_le32(0x50),
> + ATTR_LABEL = cpu_to_le32(0x60),
> + ATTR_VOL_INFO = cpu_to_le32(0x70),
> + ATTR_DATA = cpu_to_le32(0x80),
> + ATTR_ROOT = cpu_to_le32(0x90),
> + ATTR_ALLOC = cpu_to_le32(0xA0),
> + ATTR_BITMAP = cpu_to_le32(0xB0),
> + // ATTR_SYMLINK on Nt4
> + ATTR_REPARSE = cpu_to_le32(0xC0),
> + ATTR_EA_INFO = cpu_to_le32(0xD0),
> + ATTR_EA = cpu_to_le32(0xE0),
> + ATTR_PROPERTYSET = cpu_to_le32(0xF0),
> + ATTR_LOGGED_UTILITY_STREAM = cpu_to_le32(0x100),
> + ATTR_END = cpu_to_le32(0xFFFFFFFF)
> +};
> +
> +static_assert(sizeof(enum ATTR_TYPE) == 4);
> +
> +enum FILE_ATTRIBUTE {
> + FILE_ATTRIBUTE_READONLY = cpu_to_le32(0x00000001),
> + FILE_ATTRIBUTE_HIDDEN = cpu_to_le32(0x00000002),
> + FILE_ATTRIBUTE_SYSTEM = cpu_to_le32(0x00000004),
> + FILE_ATTRIBUTE_ARCHIVE = cpu_to_le32(0x00000020),
> + FILE_ATTRIBUTE_DEVICE = cpu_to_le32(0x00000040),
> + FILE_ATTRIBUTE_TEMPORARY = cpu_to_le32(0x00000100),
> + FILE_ATTRIBUTE_SPARSE_FILE = cpu_to_le32(0x00000200),
> + FILE_ATTRIBUTE_REPARSE_POINT = cpu_to_le32(0x00000400),
> + FILE_ATTRIBUTE_COMPRESSED = cpu_to_le32(0x00000800),
> + FILE_ATTRIBUTE_OFFLINE = cpu_to_le32(0x00001000),
> + FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = cpu_to_le32(0x00002000),
> + FILE_ATTRIBUTE_ENCRYPTED = cpu_to_le32(0x00004000),
> + FILE_ATTRIBUTE_VALID_FLAGS = cpu_to_le32(0x00007fb7),
> + FILE_ATTRIBUTE_DIRECTORY = cpu_to_le32(0x10000000),
> +};
> +
> +static_assert(sizeof(enum FILE_ATTRIBUTE) == 4);
> +
> +extern const struct cpu_str NAME_MFT;
> +extern const struct cpu_str NAME_MIRROR;
> +extern const struct cpu_str NAME_LOGFILE;
> +extern const struct cpu_str NAME_VOLUME;
> +extern const struct cpu_str NAME_ATTRDEF;
> +extern const struct cpu_str NAME_ROOT;
> +extern const struct cpu_str NAME_BITMAP;
> +extern const struct cpu_str NAME_BOOT;
> +extern const struct cpu_str NAME_BADCLUS;
> +extern const struct cpu_str NAME_QUOTA;
> +extern const struct cpu_str NAME_SECURE;
> +extern const struct cpu_str NAME_UPCASE;
> +extern const struct cpu_str NAME_EXTEND;
> +extern const struct cpu_str NAME_OBJID;
> +extern const struct cpu_str NAME_REPARSE;
> +extern const struct cpu_str NAME_USNJRNL;
> +
> +extern const __le16 I30_NAME[4];
> +extern const __le16 SII_NAME[4];
> +extern const __le16 SDH_NAME[4];
> +extern const __le16 SO_NAME[2];
> +extern const __le16 SQ_NAME[2];
> +extern const __le16 SR_NAME[2];
> +
> +extern const __le16 BAD_NAME[4];
> +extern const __le16 SDS_NAME[4];
> +extern const __le16 WOF_NAME[17]; /* WofCompressedData */
> +
> +/* MFT record number structure */
> +struct MFT_REF {
> + __le32 low; // The low part of the number
> + __le16 high; // The high part of the number
> + __le16 seq; // The sequence number of MFT record
> +};
> +
> +static_assert(sizeof(__le64) == sizeof(struct MFT_REF));
> +
> +static inline CLST ino_get(const struct MFT_REF *ref)
> +{
> +#ifdef NTFS3_64BIT_CLUSTER
> + return le32_to_cpu(ref->low) | ((u64)le16_to_cpu(ref->high) << 32);
> +#else
> + return le32_to_cpu(ref->low);
> +#endif
> +}
> +
> +struct NTFS_BOOT {
> + u8 jump_code[3]; // 0x00: Jump to boot code
> + u8 system_id[8]; // 0x03: System ID, equals "NTFS "
> +
> + // NOTE: this member is not aligned(!)
> + // bytes_per_sector[0] must be 0
> + // bytes_per_sector[1] must be multiplied by 256
> + u8 bytes_per_sector[2]; // 0x0B: Bytes per sector
> +
> + u8 sectors_per_clusters;// 0x0D: Sectors per cluster
> + u8 unused1[7];
> + u8 media_type; // 0x15: Media type (0xF8 - harddisk)
> + u8 unused2[2];
> + __le16 sct_per_track; // 0x18: number of sectors per track
> + __le16 heads; // 0x1A: number of heads per cylinder
> + __le32 hidden_sectors; // 0x1C: number of 'hidden' sectors
> + u8 unused3[4];
> + u8 bios_drive_num; // 0x24: BIOS drive number =0x80
> + u8 unused4;
> + u8 signature_ex; // 0x26: Extended BOOT signature =0x80
> + u8 unused5;
> + __le64 sectors_per_volume;// 0x28: size of volume in sectors
> + __le64 mft_clst; // 0x30: first cluster of $MFT
> + __le64 mft2_clst; // 0x38: first cluster of $MFTMirr
> + s8 record_size; // 0x40: size of MFT record in clusters(sectors)
> + u8 unused6[3];
> + s8 index_size; // 0x44: size of INDX record in clusters(sectors)
> + u8 unused7[3];
> + __le64 serial_num; // 0x48: Volume serial number
> + __le32 check_sum; // 0x50: Simple additive checksum of all
> + // of the u32's which precede the 'check_sum'
> +
> + u8 boot_code[0x200 - 0x50 - 2 - 4]; // 0x54:
> + u8 boot_magic[2]; // 0x1FE: Boot signature =0x55 + 0xAA
> +};
> +
> +static_assert(sizeof(struct NTFS_BOOT) == 0x200);
> +
> +enum NTFS_SIGNATURE {
> + NTFS_FILE_SIGNATURE = cpu_to_le32(0x454C4946), // 'FILE'
> + NTFS_INDX_SIGNATURE = cpu_to_le32(0x58444E49), // 'INDX'
> + NTFS_CHKD_SIGNATURE = cpu_to_le32(0x444B4843), // 'CHKD'
> + NTFS_RSTR_SIGNATURE = cpu_to_le32(0x52545352), // 'RSTR'
> + NTFS_RCRD_SIGNATURE = cpu_to_le32(0x44524352), // 'RCRD'
> + NTFS_BAAD_SIGNATURE = cpu_to_le32(0x44414142), // 'BAAD'
> + NTFS_HOLE_SIGNATURE = cpu_to_le32(0x454C4F48), // 'HOLE'
> + NTFS_FFFF_SIGNATURE = cpu_to_le32(0xffffffff),
> +};
> +
> +static_assert(sizeof(enum NTFS_SIGNATURE) == 4);
> +
> +/* MFT Record header structure */
> +struct NTFS_RECORD_HEADER {
> + /* Record magic number, equals 'FILE'/'INDX'/'RSTR'/'RCRD' */
> + enum NTFS_SIGNATURE sign; // 0x00:
> + __le16 fix_off; // 0x04:
> + __le16 fix_num; // 0x06:
> + __le64 lsn; // 0x08: Log file sequence number
> +};
> +
> +static_assert(sizeof(struct NTFS_RECORD_HEADER) == 0x10);
> +
> +static inline int is_baad(const struct NTFS_RECORD_HEADER *hdr)
> +{
> + return hdr->sign == NTFS_BAAD_SIGNATURE;
> +}
> +
> +/* Possible bits in struct MFT_REC.flags */
> +enum RECORD_FLAG {
> + RECORD_FLAG_IN_USE = cpu_to_le16(0x0001),
> + RECORD_FLAG_DIR = cpu_to_le16(0x0002),
> + RECORD_FLAG_SYSTEM = cpu_to_le16(0x0004),
> + RECORD_FLAG_UNKNOWN = cpu_to_le16(0x0008),
> +};
> +
> +/* MFT Record structure */
> +struct MFT_REC {
> + struct NTFS_RECORD_HEADER rhdr; // 'FILE'
> +
> + __le16 seq; // 0x10: Sequence number for this record
> + __le16 hard_links; // 0x12: The number of hard links to record
> + __le16 attr_off; // 0x14: Offset to attributes
> + __le16 flags; // 0x16: See RECORD_FLAG
> + __le32 used; // 0x18: The size of used part
> + __le32 total; // 0x1C: Total record size
> +
> + struct MFT_REF parent_ref; // 0x20: Parent MFT record
> + __le16 next_attr_id; // 0x28: The next attribute Id
> +
> + __le16 res; // 0x2A: High part of mft record?
> + __le32 mft_record; // 0x2C: Current mft record number
> + __le16 fixups[1]; // 0x30:
> +};
> +
> +#define MFTRECORD_FIXUP_OFFSET_1 offsetof(struct MFT_REC, res)
> +#define MFTRECORD_FIXUP_OFFSET_3 offsetof(struct MFT_REC, fixups)
> +
> +static_assert(MFTRECORD_FIXUP_OFFSET_1 == 0x2A);
> +static_assert(MFTRECORD_FIXUP_OFFSET_3 == 0x30);
> +
> +static inline bool is_rec_base(const struct MFT_REC *rec)
> +{
> + const struct MFT_REF *r = &rec->parent_ref;
> +
> + return !r->low && !r->high && !r->seq;
> +}
> +
> +static inline bool is_mft_rec5(const struct MFT_REC *rec)
> +{
> + return le16_to_cpu(rec->rhdr.fix_off) >=
> + offsetof(struct MFT_REC, fixups);
> +}
> +
> +static inline bool is_rec_inuse(const struct MFT_REC *rec)
> +{
> + return rec->flags & RECORD_FLAG_IN_USE;
> +}
> +
> +static inline bool clear_rec_inuse(struct MFT_REC *rec)
> +{
> + return rec->flags &= ~RECORD_FLAG_IN_USE;
> +}
> +
> +/* Possible values of ATTR_RESIDENT.flags */
> +#define RESIDENT_FLAG_INDEXED 0x01
> +
> +struct ATTR_RESIDENT {
> + __le32 data_size; // 0x10: The size of data
> + __le16 data_off; // 0x14: Offset to data
> + u8 flags; // 0x16: resident flags ( 1 - indexed )
> + u8 res; // 0x17:
> +}; // sizeof() = 0x18
> +
> +struct ATTR_NONRESIDENT {
> + __le64 svcn; // 0x10: Starting VCN of this segment
> + __le64 evcn; // 0x18: End VCN of this segment
> + __le16 run_off; // 0x20: Offset to packed runs
> + // Unit of Compression size for this stream, expressed
> + // as a log of the cluster size.
> + //
> + // 0 means file is not compressed
> + // 1, 2, 3, and 4 are potentially legal values if the
> + // stream is compressed, however the implementation
> + // may only choose to use 4, or possibly 3. Note
> + // that 4 means cluster size time 16. If convenient
> + // the implementation may wish to accept a
> + // reasonable range of legal values here (1-5?),
> + // even if the implementation only generates
> + // a smaller set of values itself.
> + u8 c_unit; // 0x22
> + u8 res1[5]; // 0x23:
> + __le64 alloc_size; // 0x28: The allocated size of attribute in bytes
> + // (multiple of cluster size)
> + __le64 data_size; // 0x30: The size of attribute in bytes <= alloc_size
> + __le64 valid_size; // 0x38: The size of valid part in bytes <= data_size
> + __le64 total_size; // 0x40: The sum of the allocated clusters for a file
> + // (present only for the first segment (0 == vcn)
> + // of compressed attribute)
> +
> +}; // sizeof()=0x40 or 0x48 (if compressed)
> +
> +/* Possible values of ATTRIB.flags: */
> +#define ATTR_FLAG_COMPRESSED cpu_to_le16(0x0001)
> +#define ATTR_FLAG_COMPRESSED_MASK cpu_to_le16(0x00FF)
> +#define ATTR_FLAG_ENCRYPTED cpu_to_le16(0x4000)
> +#define ATTR_FLAG_SPARSED cpu_to_le16(0x8000)
> +
> +struct ATTRIB {
> + enum ATTR_TYPE type; // 0x00: The type of this attribute
> + __le32 size; // 0x04: The size of this attribute
> + u8 non_res; // 0x08: Is this attribute non-resident ?
> + u8 name_len; // 0x09: This attribute name length
> + __le16 name_off; // 0x0A: Offset to the attribute name
> + __le16 flags; // 0x0C: See ATTR_FLAG_XXX
> + __le16 id; // 0x0E: unique id (per record)
> +
> + union {
> + struct ATTR_RESIDENT res; // 0x10
> + struct ATTR_NONRESIDENT nres; // 0x10
> + };
> +};
> +
> +/* Define attribute sizes */
> +#define SIZEOF_RESIDENT 0x18
> +#define SIZEOF_NONRESIDENT_EX 0x48
> +#define SIZEOF_NONRESIDENT 0x40
> +
> +#define SIZEOF_RESIDENT_LE cpu_to_le16(0x18)
> +#define SIZEOF_NONRESIDENT_EX_LE cpu_to_le16(0x48)
> +#define SIZEOF_NONRESIDENT_LE cpu_to_le16(0x40)
> +
> +static inline u64 attr_ondisk_size(const struct ATTRIB *attr)
> +{
> + return attr->non_res ? ((attr->flags &
> + (ATTR_FLAG_COMPRESSED | ATTR_FLAG_SPARSED)) ?
> + le64_to_cpu(attr->nres.total_size) :
> + le64_to_cpu(attr->nres.alloc_size)) :
> + QuadAlign(le32_to_cpu(attr->res.data_size));
> +}
> +
> +static inline u64 attr_size(const struct ATTRIB *attr)
> +{
> + return attr->non_res ? le64_to_cpu(attr->nres.data_size) :
> + le32_to_cpu(attr->res.data_size);
> +}
> +
> +static inline bool is_attr_encrypted(const struct ATTRIB *attr)
> +{
> + return attr->flags & ATTR_FLAG_ENCRYPTED;
> +}
> +
> +static inline bool is_attr_sparsed(const struct ATTRIB *attr)
> +{
> + return attr->flags & ATTR_FLAG_SPARSED;
> +}
> +
> +static inline bool is_attr_compressed(const struct ATTRIB *attr)
> +{
> + return attr->flags & ATTR_FLAG_COMPRESSED;
> +}
> +
> +static inline bool is_attr_ext(const struct ATTRIB *attr)
> +{
> + return attr->flags & (ATTR_FLAG_SPARSED | ATTR_FLAG_COMPRESSED);
> +}
> +
> +static inline bool is_attr_indexed(const struct ATTRIB *attr)
> +{
> + return !attr->non_res && (attr->res.flags & RESIDENT_FLAG_INDEXED);
> +}
> +
> +static const inline __le16 *attr_name(const struct ATTRIB *attr)
> +{
> + return Add2Ptr(attr, le16_to_cpu(attr->name_off));
> +}
> +
> +static inline u64 attr_svcn(const struct ATTRIB *attr)
> +{
> + return attr->non_res ? le64_to_cpu(attr->nres.svcn) : 0;
> +}
> +
> +/* the size of resident attribute by its resident size */
> +#define BYTES_PER_RESIDENT(b) (0x18 + (b))
> +
> +static_assert(sizeof(struct ATTRIB) == 0x48);
> +static_assert(sizeof(((struct ATTRIB *)NULL)->res) == 0x08);
> +static_assert(sizeof(((struct ATTRIB *)NULL)->nres) == 0x38);
> +
> +static inline void *resident_data_ex(const struct ATTRIB *attr, u32 datasize)
> +{
> + u32 asize, rsize;
> + u16 off;
> +
> + if (attr->non_res)
> + return NULL;
> +
> + asize = le32_to_cpu(attr->size);
> + off = le16_to_cpu(attr->res.data_off);
> +
> + if (asize < datasize + off)
> + return NULL;
> +
> + rsize = le32_to_cpu(attr->res.data_size);
> + if (rsize < datasize)
> + return NULL;
> +
> + return Add2Ptr(attr, off);
> +}
> +
> +static inline void *resident_data(const struct ATTRIB *attr)
> +{
> + return Add2Ptr(attr, le16_to_cpu(attr->res.data_off));
> +}
> +
> +static inline void *attr_run(const struct ATTRIB *attr)
> +{
> + return Add2Ptr(attr, le16_to_cpu(attr->nres.run_off));
> +}
> +
> +/* Standard information attribute (0x10) */
> +struct ATTR_STD_INFO {
> + __le64 cr_time; // 0x00: File creation file
> + __le64 m_time; // 0x08: File modification time
> + __le64 c_time; // 0x10: Last time any attribute was modified
> + __le64 a_time; // 0x18: File last access time
> + enum FILE_ATTRIBUTE fa; // 0x20: Standard DOS attributes & more
> + __le32 max_ver_num; // 0x24: Maximum Number of Versions
> + __le32 ver_num; // 0x28: Version Number
> + __le32 class_id; // 0x2C: Class Id from bidirectional Class Id index
> +};
> +
> +static_assert(sizeof(struct ATTR_STD_INFO) == 0x30);
> +
> +#define SECURITY_ID_INVALID 0x00000000
> +#define SECURITY_ID_FIRST 0x00000100
> +
> +struct ATTR_STD_INFO5 {
> + __le64 cr_time; // 0x00: File creation file
> + __le64 m_time; // 0x08: File modification time
> + __le64 c_time; // 0x10: Last time any attribute was modified
> + __le64 a_time; // 0x18: File last access time
> + enum FILE_ATTRIBUTE fa; // 0x20: Standard DOS attributes & more
> + __le32 max_ver_num; // 0x24: Maximum Number of Versions
> + __le32 ver_num; // 0x28: Version Number
> + __le32 class_id; // 0x2C: Class Id from bidirectional Class Id index
> +
> + __le32 owner_id; // 0x30: Owner Id of the user owning the file.
> + __le32 security_id; // 0x34: The Security Id is a key in the $SII Index and $SDS
> + __le64 quota_charge; // 0x38:
> + __le64 usn; // 0x40: Last Update Sequence Number of the file. This is a direct
> + // index into the file $UsnJrnl. If zero, the USN Journal is
> + // disabled.
> +};
> +
> +static_assert(sizeof(struct ATTR_STD_INFO5) == 0x48);
> +
> +/* attribute list entry structure (0x20) */
> +struct ATTR_LIST_ENTRY {
> + enum ATTR_TYPE type; // 0x00: The type of attribute
> + __le16 size; // 0x04: The size of this record
> + u8 name_len; // 0x06: The length of attribute name
> + u8 name_off; // 0x07: The offset to attribute name
> + __le64 vcn; // 0x08: Starting VCN of this attribute
> + struct MFT_REF ref; // 0x10: MFT record number with attribute
> + __le16 id; // 0x18: struct ATTRIB ID
> + __le16 name[3]; // 0x1A: Just to align. To get real name can use bNameOffset
> +
> +}; // sizeof(0x20)
> +
> +static_assert(sizeof(struct ATTR_LIST_ENTRY) == 0x20);
> +
> +static inline u32 le_size(u8 name_len)
> +{
> + return QuadAlign(offsetof(struct ATTR_LIST_ENTRY, name) +
> + name_len * sizeof(short));
> +}
> +
> +/* returns 0 if 'attr' has the same type and name */
> +static inline int le_cmp(const struct ATTR_LIST_ENTRY *le,
> + const struct ATTRIB *attr)
> +{
> + return le->type != attr->type || le->name_len != attr->name_len ||
> + (!le->name_len &&
> + memcmp(Add2Ptr(le, le->name_off),
> + Add2Ptr(attr, le16_to_cpu(attr->name_off)),
> + le->name_len * sizeof(short)));
> +}
> +
> +static const inline __le16 *le_name(const struct ATTR_LIST_ENTRY *le)
> +{
> + return Add2Ptr(le, le->name_off);
> +}
> +
> +/* File name types (the field type in struct ATTR_FILE_NAME ) */
> +#define FILE_NAME_POSIX 0
> +#define FILE_NAME_UNICODE 1
> +#define FILE_NAME_DOS 2
> +#define FILE_NAME_UNICODE_AND_DOS (FILE_NAME_DOS | FILE_NAME_UNICODE)
> +
> +/* Filename attribute structure (0x30) */
> +struct NTFS_DUP_INFO {
> + __le64 cr_time; // 0x00: File creation file
> + __le64 m_time; // 0x08: File modification time
> + __le64 c_time; // 0x10: Last time any attribute was modified
> + __le64 a_time; // 0x18: File last access time
> + __le64 alloc_size; // 0x20: Data attribute allocated size, multiple of cluster size
> + __le64 data_size; // 0x28: Data attribute size <= Dataalloc_size
> + enum FILE_ATTRIBUTE fa; // 0x30: Standard DOS attributes & more
> + __le16 ea_size; // 0x34: Packed EAs
> + __le16 reparse; // 0x36: Used by Reparse
> +
> +}; // 0x38
> +
> +struct ATTR_FILE_NAME {
> + struct MFT_REF home; // 0x00: MFT record for directory
> + struct NTFS_DUP_INFO dup;// 0x08
> + u8 name_len; // 0x40: File name length in words
> + u8 type; // 0x41: File name type
> + __le16 name[1]; // 0x42: File name
> +};
> +
> +static_assert(sizeof(((struct ATTR_FILE_NAME *)NULL)->dup) == 0x38);
> +static_assert(offsetof(struct ATTR_FILE_NAME, name) == 0x42);
> +#define SIZEOF_ATTRIBUTE_FILENAME 0x44
> +#define SIZEOF_ATTRIBUTE_FILENAME_MAX (0x42 + 255 * 2)
> +
> +static inline struct ATTRIB *attr_from_name(struct ATTR_FILE_NAME *fname)
> +{
> + return (struct ATTRIB *)((char *)fname - SIZEOF_RESIDENT);
> +}
> +
> +static inline u16 fname_full_size(const struct ATTR_FILE_NAME *fname)
> +{
> + return offsetof(struct ATTR_FILE_NAME, name) +
> + fname->name_len * sizeof(short);
> +}
> +
> +static inline u8 paired_name(u8 type)
> +{
> + if (type == FILE_NAME_UNICODE)
> + return FILE_NAME_DOS;
> + if (type == FILE_NAME_DOS)
> + return FILE_NAME_UNICODE;
> + return FILE_NAME_POSIX;
> +}
> +
> +/* Index entry defines ( the field flags in NtfsDirEntry ) */
> +#define NTFS_IE_HAS_SUBNODES cpu_to_le16(1)
> +#define NTFS_IE_LAST cpu_to_le16(2)
> +
> +/* Directory entry structure */
> +struct NTFS_DE {
> + union {
> + struct MFT_REF ref; // 0x00: MFT record number with this file
> + struct {
> + __le16 data_off; // 0x00:
> + __le16 data_size; // 0x02:
> + __le32 res; // 0x04: must be 0
> + } view;
> + };
> + __le16 size; // 0x08: The size of this entry
> + __le16 key_size; // 0x0A: The size of File name length in bytes + 0x42
> + __le16 flags; // 0x0C: Entry flags: NTFS_IE_XXX
> + __le16 res; // 0x0E:
> +
> + // Here any indexed attribute can be placed
> + // One of them is:
> + // struct ATTR_FILE_NAME AttrFileName;
> + //
> +
> + // The last 8 bytes of this structure contains
> + // the VBN of subnode
> + // !!! Note !!!
> + // This field is presented only if (flags & NTFS_IE_HAS_SUBNODES)
> + // __le64 vbn;
> +};
> +
> +static_assert(sizeof(struct NTFS_DE) == 0x10);
> +
> +static inline void de_set_vbn_le(struct NTFS_DE *e, __le64 vcn)
> +{
> + __le64 *v = Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));
> +
> + *v = vcn;
> +}
> +
> +static inline void de_set_vbn(struct NTFS_DE *e, CLST vcn)
> +{
> + __le64 *v = Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));
> +
> + *v = cpu_to_le64(vcn);
> +}
> +
> +static inline __le64 de_get_vbn_le(const struct NTFS_DE *e)
> +{
> + return *(__le64 *)Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));
> +}
> +
> +static inline CLST de_get_vbn(const struct NTFS_DE *e)
> +{
> + __le64 *v = Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));
> +
> + return le64_to_cpu(*v);
> +}
> +
> +static inline struct NTFS_DE *de_get_next(const struct NTFS_DE *e)
> +{
> + return Add2Ptr(e, le16_to_cpu(e->size));
> +}
> +
> +static inline struct ATTR_FILE_NAME *de_get_fname(const struct NTFS_DE *e)
> +{
> + return le16_to_cpu(e->key_size) >= SIZEOF_ATTRIBUTE_FILENAME ?
> + Add2Ptr(e, sizeof(struct NTFS_DE)) :
> + NULL;
> +}
> +
> +static inline bool de_is_last(const struct NTFS_DE *e)
> +{
> + return e->flags & NTFS_IE_LAST;
> +}
> +
> +static inline bool de_has_vcn(const struct NTFS_DE *e)
> +{
> + return e->flags & NTFS_IE_HAS_SUBNODES;
> +}
> +
> +static inline bool de_has_vcn_ex(const struct NTFS_DE *e)
> +{
> + return (e->flags & NTFS_IE_HAS_SUBNODES) &&
> + (u64)(-1) != *((u64 *)Add2Ptr(e, le16_to_cpu(e->size) -
> + sizeof(__le64)));
> +}
> +
> +#define MAX_BYTES_PER_NAME_ENTRY \
> + QuadAlign(sizeof(struct NTFS_DE) + \
> + offsetof(struct ATTR_FILE_NAME, name) + \
> + NTFS_NAME_LEN * sizeof(short))
> +
> +struct INDEX_HDR {
> + __le32 de_off; // 0x00: The offset from the start of this structure
> + // to the first NTFS_DE
> + __le32 used; // 0x04: The size of this structure plus all
> + // entries (quad-word aligned)
> + __le32 total; // 0x08: The allocated size of for this structure plus all entries
> + u8 flags; // 0x0C: 0x00 = Small directory, 0x01 = Large directory
> + u8 res[3];
> +
> + //
> + // de_off + used <= total
> + //
> +};
> +
> +static_assert(sizeof(struct INDEX_HDR) == 0x10);
> +
> +static inline struct NTFS_DE *hdr_first_de(const struct INDEX_HDR *hdr)
> +{
> + u32 de_off = le32_to_cpu(hdr->de_off);
> + u32 used = le32_to_cpu(hdr->used);
> + struct NTFS_DE *e = Add2Ptr(hdr, de_off);
> + u16 esize;
> +
> + if (de_off >= used || de_off >= le32_to_cpu(hdr->total))
> + return NULL;
> +
> + esize = le16_to_cpu(e->size);
> + if (esize < sizeof(struct NTFS_DE) || de_off + esize > used)
> + return NULL;
> +
> + return e;
> +}
> +
> +static inline struct NTFS_DE *hdr_next_de(const struct INDEX_HDR *hdr,
> + const struct NTFS_DE *e)
> +{
> + size_t off = PtrOffset(hdr, e);
> + u32 used = le32_to_cpu(hdr->used);
> + u16 esize;
> +
> + if (off >= used)
> + return NULL;
> +
> + esize = le16_to_cpu(e->size);
> +
> + if (esize < sizeof(struct NTFS_DE) ||
> + off + esize + sizeof(struct NTFS_DE) > used)
> + return NULL;
> +
> + return Add2Ptr(e, esize);
> +}
> +
> +static inline bool hdr_has_subnode(const struct INDEX_HDR *hdr)
> +{
> + return hdr->flags & 1;
> +}
> +
> +struct INDEX_BUFFER {
> + struct NTFS_RECORD_HEADER rhdr; // 'INDX'
> + __le64 vbn; // 0x10: vcn if index >= cluster or vsn id index < cluster
> + struct INDEX_HDR ihdr; // 0x18:
> +};
> +
> +static_assert(sizeof(struct INDEX_BUFFER) == 0x28);
> +
> +static inline bool ib_is_empty(const struct INDEX_BUFFER *ib)
> +{
> + const struct NTFS_DE *first = hdr_first_de(&ib->ihdr);
> +
> + return !first || de_is_last(first);
> +}
> +
> +static inline bool ib_is_leaf(const struct INDEX_BUFFER *ib)
> +{
> + return !(ib->ihdr.flags & 1);
> +}
> +
> +/* Index root structure ( 0x90 ) */
> +enum COLLATION_RULE {
> + NTFS_COLLATION_TYPE_BINARY = cpu_to_le32(0),
> + // $I30
> + NTFS_COLLATION_TYPE_FILENAME = cpu_to_le32(0x01),
> + // $SII of $Secure and $Q of Quota
> + NTFS_COLLATION_TYPE_UINT = cpu_to_le32(0x10),
> + // $O of Quota
> + NTFS_COLLATION_TYPE_SID = cpu_to_le32(0x11),
> + // $SDH of $Secure
> + NTFS_COLLATION_TYPE_SECURITY_HASH = cpu_to_le32(0x12),
> + // $O of ObjId and "$R" for Reparse
> + NTFS_COLLATION_TYPE_UINTS = cpu_to_le32(0x13)
> +};
> +
> +static_assert(sizeof(enum COLLATION_RULE) == 4);
> +
> +//
> +struct INDEX_ROOT {
> + enum ATTR_TYPE type; // 0x00: The type of attribute to index on
> + enum COLLATION_RULE rule; // 0x04: The rule
> + __le32 index_block_size;// 0x08: The size of index record
> + u8 index_block_clst; // 0x0C: The number of clusters per index
> + u8 res[3];
> + struct INDEX_HDR ihdr; // 0x10:
> +};
> +
> +static_assert(sizeof(struct INDEX_ROOT) == 0x20);
> +static_assert(offsetof(struct INDEX_ROOT, ihdr) == 0x10);
> +
> +#define VOLUME_FLAG_DIRTY cpu_to_le16(0x0001)
> +#define VOLUME_FLAG_RESIZE_LOG_FILE cpu_to_le16(0x0002)
> +
> +struct VOLUME_INFO {
> + __le64 res1; // 0x00
> + u8 major_ver; // 0x08: NTFS major version number (before .)
> + u8 minor_ver; // 0x09: NTFS minor version number (after .)
> + __le16 flags; // 0x0A: Volume flags, see VOLUME_FLAG_XXX
> +
> +}; // sizeof=0xC
> +
> +#define SIZEOF_ATTRIBUTE_VOLUME_INFO 0xc
> +
> +#define NTFS_LABEL_MAX_LENGTH (0x100 / sizeof(short))
> +#define NTFS_ATTR_INDEXABLE cpu_to_le32(0x00000002)
> +#define NTFS_ATTR_DUPALLOWED cpu_to_le32(0x00000004)
> +#define NTFS_ATTR_MUST_BE_INDEXED cpu_to_le32(0x00000010)
> +#define NTFS_ATTR_MUST_BE_NAMED cpu_to_le32(0x00000020)
> +#define NTFS_ATTR_MUST_BE_RESIDENT cpu_to_le32(0x00000040)
> +#define NTFS_ATTR_LOG_ALWAYS cpu_to_le32(0x00000080)
> +
> +/* $AttrDef file entry */
> +struct ATTR_DEF_ENTRY {
> + __le16 name[0x40]; // 0x00: Attr name
> + enum ATTR_TYPE type; // 0x80: struct ATTRIB type
> + __le32 res; // 0x84:
> + enum COLLATION_RULE rule; // 0x88:
> + __le32 flags; // 0x8C: NTFS_ATTR_XXX (see above)
> + __le64 min_sz; // 0x90: Minimum attribute data size
> + __le64 max_sz; // 0x98: Maximum attribute data size
> +};
> +
> +static_assert(sizeof(struct ATTR_DEF_ENTRY) == 0xa0);
> +
> +/* Object ID (0x40) */
> +struct OBJECT_ID {
> + struct GUID ObjId; // 0x00: Unique Id assigned to file
> + struct GUID BirthVolumeId;// 0x10: Birth Volume Id is the Object Id of the Volume on
> + // which the Object Id was allocated. It never changes
> + struct GUID BirthObjectId; // 0x20: Birth Object Id is the first Object Id that was
> + // ever assigned to this MFT Record. I.e. If the Object Id
> + // is changed for some reason, this field will reflect the
> + // original value of the Object Id.
> + struct GUID DomainId; // 0x30: Domain Id is currently unused but it is intended to be
> + // used in a network environment where the local machine is
> + // part of a Windows 2000 Domain. This may be used in a Windows
> + // 2000 Advanced Server managed domain.
> +};
> +
> +static_assert(sizeof(struct OBJECT_ID) == 0x40);
> +
> +/* O Directory entry structure ( rule = 0x13 ) */
> +struct NTFS_DE_O {
> + struct NTFS_DE de;
> + struct GUID ObjId; // 0x10: Unique Id assigned to file
> + struct MFT_REF ref; // 0x20: MFT record number with this file
> + struct GUID BirthVolumeId; // 0x28: Birth Volume Id is the Object Id of the Volume on
> + // which the Object Id was allocated. It never changes
> + struct GUID BirthObjectId; // 0x38: Birth Object Id is the first Object Id that was
> + // ever assigned to this MFT Record. I.e. If the Object Id
> + // is changed for some reason, this field will reflect the
> + // original value of the Object Id.
> + // This field is valid if data_size == 0x48
> + struct GUID BirthDomainId; // 0x48: Domain Id is currently unused but it is intended
> + // to be used in a network environment where the local
> + // machine is part of a Windows 2000 Domain. This may be
> + // used in a Windows 2000 Advanced Server managed domain.
> +};
> +
> +static_assert(sizeof(struct NTFS_DE_O) == 0x58);
> +
> +#define NTFS_OBJECT_ENTRY_DATA_SIZE1 \
> + 0x38 // struct NTFS_DE_O.BirthDomainId is not used
> +#define NTFS_OBJECT_ENTRY_DATA_SIZE2 \
> + 0x48 // struct NTFS_DE_O.BirthDomainId is used
> +
> +/* Q Directory entry structure ( rule = 0x11 ) */
> +struct NTFS_DE_Q {
> + struct NTFS_DE de;
> + __le32 owner_id; // 0x10: Unique Id assigned to file
> + __le32 Version; // 0x14: 0x02
> + __le32 flags2; // 0x18: Quota flags, see above
> + __le64 BytesUsed; // 0x1C:
> + __le64 ChangeTime; // 0x24:
> + __le64 WarningLimit; // 0x28:
> + __le64 HardLimit; // 0x34:
> + __le64 ExceededTime; // 0x3C:
> +
> + // SID is placed here
> +}; // sizeof() = 0x44
> +
> +#define SIZEOF_NTFS_DE_Q 0x44
> +
> +#define SecurityDescriptorsBlockSize 0x40000 // 256K
> +#define SecurityDescriptorMaxSize 0x20000 // 128K
> +#define Log2OfSecurityDescriptorsBlockSize 18
> +
> +struct SECURITY_KEY {
> + __le32 hash; // Hash value for descriptor
> + __le32 sec_id; // Security Id (guaranteed unique)
> +};
> +
> +/* Security descriptors (the content of $Secure::SDS data stream) */
> +struct SECURITY_HDR {
> + struct SECURITY_KEY key; // 0x00: Security Key
> + __le64 off; // 0x08: Offset of this entry in the file
> + __le32 size; // 0x10: Size of this entry, 8 byte aligned
> + //
> + // Security descriptor itself is placed here
> + // Total size is 16 byte aligned
> + //
> +} __packed;
> +
> +#define SIZEOF_SECURITY_HDR 0x14
> +
> +/* SII Directory entry structure */
> +struct NTFS_DE_SII {
> + struct NTFS_DE de;
> + __le32 sec_id; // 0x10: Key: sizeof(security_id) = wKeySize
> + struct SECURITY_HDR sec_hdr; // 0x14:
> +} __packed;
> +
> +#define SIZEOF_SII_DIRENTRY 0x28
> +
> +/* SDH Directory entry structure */
> +struct NTFS_DE_SDH {
> + struct NTFS_DE de;
> + struct SECURITY_KEY key; // 0x10: Key
> + struct SECURITY_HDR sec_hdr; // 0x18: Data
> + __le16 magic[2]; // 0x2C: 0x00490049 "I I"
> +};
> +
> +#define SIZEOF_SDH_DIRENTRY 0x30
> +
> +struct REPARSE_KEY {
> + __le32 ReparseTag; // 0x00: Reparse Tag
> + struct MFT_REF ref; // 0x04: MFT record number with this file
> +}; // sizeof() = 0x0C
> +
> +static_assert(offsetof(struct REPARSE_KEY, ref) == 0x04);
> +#define SIZEOF_REPARSE_KEY 0x0C
> +
> +/* Reparse Directory entry structure */
> +struct NTFS_DE_R {
> + struct NTFS_DE de;
> + struct REPARSE_KEY key; // 0x10: Reparse Key
> + u32 zero; // 0x1c
> +}; // sizeof() = 0x20
> +
> +static_assert(sizeof(struct NTFS_DE_R) == 0x20);
> +
> +/* CompressReparseBuffer.WofVersion */
> +#define WOF_CURRENT_VERSION cpu_to_le32(1)
> +/* CompressReparseBuffer.WofProvider */
> +#define WOF_PROVIDER_WIM cpu_to_le32(1)
> +/* CompressReparseBuffer.WofProvider */
> +#define WOF_PROVIDER_SYSTEM cpu_to_le32(2)
> +/* CompressReparseBuffer.ProviderVer */
> +#define WOF_PROVIDER_CURRENT_VERSION cpu_to_le32(1)
> +
> +#define WOF_COMPRESSION_XPRESS4K cpu_to_le32(0) // 4k
> +#define WOF_COMPRESSION_LZX32K cpu_to_le32(1) // 32k
> +#define WOF_COMPRESSION_XPRESS8K cpu_to_le32(2) // 8k
> +#define WOF_COMPRESSION_XPRESS16K cpu_to_le32(3) // 16k
> +
> +/*
> + * ATTR_REPARSE (0xC0)
> + *
> + * The reparse struct GUID structure is used by all 3rd party layered drivers to
> + * store data in a reparse point. For non-Microsoft tags, The struct GUID field
> + * cannot be GUID_NULL.
> + * The constraints on reparse tags are defined below.
> + * Microsoft tags can also be used with this format of the reparse point buffer.
> + */
> +struct REPARSE_POINT {
> + __le32 ReparseTag; // 0x00:
> + __le16 ReparseDataLength;// 0x04:
> + __le16 Reserved;
> +
> + struct GUID Guid; // 0x08:
> +
> + //
> + // Here GenericReparseBuffer is placed
> + //
> +};
> +
> +static_assert(sizeof(struct REPARSE_POINT) == 0x18);
> +
> +//
> +// Maximum allowed size of the reparse data.
> +//
> +#define MAXIMUM_REPARSE_DATA_BUFFER_SIZE (16 * 1024)
> +
> +//
> +// The value of the following constant needs to satisfy the following
> +// conditions:
> +// (1) Be at least as large as the largest of the reserved tags.
> +// (2) Be strictly smaller than all the tags in use.
> +//
> +#define IO_REPARSE_TAG_RESERVED_RANGE 1
> +
> +//
> +// The reparse tags are a ULONG. The 32 bits are laid out as follows:
> +//
> +// 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
> +// 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
> +// +-+-+-+-+-----------------------+-------------------------------+
> +// |M|R|N|R| Reserved bits | Reparse Tag Value |
> +// +-+-+-+-+-----------------------+-------------------------------+
> +//
> +// M is the Microsoft bit. When set to 1, it denotes a tag owned by Microsoft.
> +// All ISVs must use a tag with a 0 in this position.
> +// Note: If a Microsoft tag is used by non-Microsoft software, the
> +// behavior is not defined.
> +//
> +// R is reserved. Must be zero for non-Microsoft tags.
> +//
> +// N is name surrogate. When set to 1, the file represents another named
> +// entity in the system.
> +//
> +// The M and N bits are OR-able.
> +// The following macros check for the M and N bit values:
> +//
> +
> +//
> +// Macro to determine whether a reparse point tag corresponds to a tag
> +// owned by Microsoft.
> +//
> +#define IsReparseTagMicrosoft(_tag) (((_tag)&IO_REPARSE_TAG_MICROSOFT))
> +
> +//
> +// Macro to determine whether a reparse point tag is a name surrogate
> +//
> +#define IsReparseTagNameSurrogate(_tag) (((_tag)&IO_REPARSE_TAG_NAME_SURROGATE))
> +
> +//
> +// The following constant represents the bits that are valid to use in
> +// reparse tags.
> +//
> +#define IO_REPARSE_TAG_VALID_VALUES 0xF000FFFF
> +
> +//
> +// Macro to determine whether a reparse tag is a valid tag.
> +//
> +#define IsReparseTagValid(_tag) \
> + (!((_tag) & ~IO_REPARSE_TAG_VALID_VALUES) && \
> + ((_tag) > IO_REPARSE_TAG_RESERVED_RANGE))
> +
> +//
> +// Microsoft tags for reparse points.
> +//
> +
> +enum IO_REPARSE_TAG {
> + IO_REPARSE_TAG_SYMBOLIC_LINK = cpu_to_le32(0),
> + IO_REPARSE_TAG_NAME_SURROGATE = cpu_to_le32(0x20000000),
> + IO_REPARSE_TAG_MICROSOFT = cpu_to_le32(0x80000000),
> + IO_REPARSE_TAG_MOUNT_POINT = cpu_to_le32(0xA0000003),
> + IO_REPARSE_TAG_SYMLINK = cpu_to_le32(0xA000000C),
> + IO_REPARSE_TAG_HSM = cpu_to_le32(0xC0000004),
> + IO_REPARSE_TAG_SIS = cpu_to_le32(0x80000007),
> + IO_REPARSE_TAG_DEDUP = cpu_to_le32(0x80000013),
> + IO_REPARSE_TAG_COMPRESS = cpu_to_le32(0x80000017),
> +
> + //
> + // The reparse tag 0x80000008 is reserved for Microsoft internal use
> + // (may be published in the future)
> + //
> +
> + //
> + // Microsoft reparse tag reserved for DFS
> + //
> + IO_REPARSE_TAG_DFS = cpu_to_le32(0x8000000A),
> +
> + //
> + // Microsoft reparse tag reserved for the file system filter manager
> + //
> + IO_REPARSE_TAG_FILTER_MANAGER = cpu_to_le32(0x8000000B),
> +
> + //
> + // Non-Microsoft tags for reparse points
> + //
> +
> + //
> + // Tag allocated to CONGRUENT, May 2000. Used by IFSTEST
> + //
> + IO_REPARSE_TAG_IFSTEST_CONGRUENT = cpu_to_le32(0x00000009),
> +
> + //
> + // Tag allocated to ARKIVIO
> + //
> + IO_REPARSE_TAG_ARKIVIO = cpu_to_le32(0x0000000C),
> +
> + //
> + // Tag allocated to SOLUTIONSOFT
> + //
> + IO_REPARSE_TAG_SOLUTIONSOFT = cpu_to_le32(0x2000000D),
> +
> + //
> + // Tag allocated to COMMVAULT
> + //
> + IO_REPARSE_TAG_COMMVAULT = cpu_to_le32(0x0000000E),
> +
> + // OneDrive??
> + IO_REPARSE_TAG_CLOUD = cpu_to_le32(0x9000001A),
> + IO_REPARSE_TAG_CLOUD_1 = cpu_to_le32(0x9000101A),
> + IO_REPARSE_TAG_CLOUD_2 = cpu_to_le32(0x9000201A),
> + IO_REPARSE_TAG_CLOUD_3 = cpu_to_le32(0x9000301A),
> + IO_REPARSE_TAG_CLOUD_4 = cpu_to_le32(0x9000401A),
> + IO_REPARSE_TAG_CLOUD_5 = cpu_to_le32(0x9000501A),
> + IO_REPARSE_TAG_CLOUD_6 = cpu_to_le32(0x9000601A),
> + IO_REPARSE_TAG_CLOUD_7 = cpu_to_le32(0x9000701A),
> + IO_REPARSE_TAG_CLOUD_8 = cpu_to_le32(0x9000801A),
> + IO_REPARSE_TAG_CLOUD_9 = cpu_to_le32(0x9000901A),
> + IO_REPARSE_TAG_CLOUD_A = cpu_to_le32(0x9000A01A),
> + IO_REPARSE_TAG_CLOUD_B = cpu_to_le32(0x9000B01A),
> + IO_REPARSE_TAG_CLOUD_C = cpu_to_le32(0x9000C01A),
> + IO_REPARSE_TAG_CLOUD_D = cpu_to_le32(0x9000D01A),
> + IO_REPARSE_TAG_CLOUD_E = cpu_to_le32(0x9000E01A),
> + IO_REPARSE_TAG_CLOUD_F = cpu_to_le32(0x9000F01A),
> +
> +};
> +
> +#define SYMLINK_FLAG_RELATIVE 1
> +
> +/* Microsoft reparse buffer. (see DDK for details) */
> +struct REPARSE_DATA_BUFFER {
> + __le32 ReparseTag; // 0x00:
> + __le16 ReparseDataLength; // 0x04:
> + __le16 Reserved;
> +
> + union {
> + // If ReparseTag == 0xA0000003 (IO_REPARSE_TAG_MOUNT_POINT)
> + struct {
> + __le16 SubstituteNameOffset; // 0x08
> + __le16 SubstituteNameLength; // 0x0A
> + __le16 PrintNameOffset; // 0x0C
> + __le16 PrintNameLength; // 0x0E
> + __le16 PathBuffer[1]; // 0x10
> + } MountPointReparseBuffer;
> +
> + // If ReparseTag == 0xA000000C (IO_REPARSE_TAG_SYMLINK)
> + // https://msdn.microsoft.com/en-us/library/cc232006.aspx
> + struct {
> + __le16 SubstituteNameOffset; // 0x08
> + __le16 SubstituteNameLength; // 0x0A
> + __le16 PrintNameOffset; // 0x0C
> + __le16 PrintNameLength; // 0x0E
> + // 0-absolute path 1- relative path, SYMLINK_FLAG_RELATIVE
> + __le32 Flags; // 0x10
> + __le16 PathBuffer[1]; // 0x14
> + } SymbolicLinkReparseBuffer;
> +
> + // If ReparseTag == 0x80000017U
> + struct {
> + __le32 WofVersion; // 0x08 == 1
> + /* 1 - WIM backing provider ("WIMBoot"),
> + * 2 - System compressed file provider
> + */
> + __le32 WofProvider; // 0x0C
> + __le32 ProviderVer; // 0x10: == 1 WOF_FILE_PROVIDER_CURRENT_VERSION == 1
> + __le32 CompressionFormat; // 0x14: 0, 1, 2, 3. See WOF_COMPRESSION_XXX
> + } CompressReparseBuffer;
> +
> + struct {
> + u8 DataBuffer[1]; // 0x08
> + } GenericReparseBuffer;
> + };
> +};
> +
> +/* ATTR_EA_INFO (0xD0) */
> +
> +#define FILE_NEED_EA 0x80 // See ntifs.h
> +/* FILE_NEED_EA, indicates that the file to which the EA belongs cannot be
> + * interpreted without understanding the associated extended attributes.
> + */
> +struct EA_INFO {
> + __le16 size_pack; // 0x00: Size of buffer to hold in packed form
> + __le16 count; // 0x02: Count of EA's with FILE_NEED_EA bit set
> + __le32 size; // 0x04: Size of buffer to hold in unpacked form
> +};
> +
> +static_assert(sizeof(struct EA_INFO) == 8);
> +
> +/* ATTR_EA (0xE0) */
> +struct EA_FULL {
> + __le32 size; // 0x00: (not in packed)
> + u8 flags; // 0x04
> + u8 name_len; // 0x05
> + __le16 elength; // 0x06
> + u8 name[1]; // 0x08
> +};
> +
> +static_assert(offsetof(struct EA_FULL, name) == 8);
> +
> +#define MAX_EA_DATA_SIZE (256 * 1024)
> +
> +#define ACL_REVISION 2
> +
> +#define SE_SELF_RELATIVE cpu_to_le16(0x8000)
> +
> +struct SECURITY_DESCRIPTOR_RELATIVE {
> + u8 Revision;
> + u8 Sbz1;
> + __le16 Control;
> + __le32 Owner;
> + __le32 Group;
> + __le32 Sacl;
> + __le32 Dacl;
> +};
> +static_assert(sizeof(struct SECURITY_DESCRIPTOR_RELATIVE) == 0x14);
> +
> +struct ACE_HEADER {
> + u8 AceType;
> + u8 AceFlags;
> + __le16 AceSize;
> +};
> +static_assert(sizeof(struct ACE_HEADER) == 4);
> +
> +struct ACL {
> + u8 AclRevision;
> + u8 Sbz1;
> + __le16 AclSize;
> + __le16 AceCount;
> + __le16 Sbz2;
> +};
> +static_assert(sizeof(struct ACL) == 8);
> +
> +struct SID {
> + u8 Revision;
> + u8 SubAuthorityCount;
> + u8 IdentifierAuthority[6];
> + __le32 SubAuthority[1];
> +};
> +static_assert(offsetof(struct SID, SubAuthority) == 8);
> +
> +// clang-format on
> diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
> new file mode 100644
> index 000000000000..166a4937af40
> --- /dev/null
> +++ b/fs/ntfs3/ntfs_fs.h
> @@ -0,0 +1,1056 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + *
> + * Copyright (C) 2019-2020 Paragon Software GmbH, All rights reserved.
> + *
> + */
> +
> +// clang-format off
> +#define MINUS_ONE_T ((size_t)(-1))
> +/* Biggest MFT / smallest cluster */
> +#define MAXIMUM_BYTES_PER_MFT 4096
> +#define NTFS_BLOCKS_PER_MFT_RECORD (MAXIMUM_BYTES_PER_MFT / 512)
> +
> +#define MAXIMUM_BYTES_PER_INDEX 4096
> +#define NTFS_BLOCKS_PER_INODE (MAXIMUM_BYTES_PER_INDEX / 512)
> +
> +/* ntfs specific error code when fixup failed*/
> +#define E_NTFS_FIXUP 555
> +/* ntfs specific error code about resident->nonresident*/
> +#define E_NTFS_NONRESIDENT 556
> +
> +/* sbi->flags */
> +#define NTFS_FLAGS_NODISCARD 0x00000001
> +#define NTFS_FLAGS_NEED_REPLAY 0x04000000
> +
> +/* ni->ni_flags */
> +/*
> + * Data attribute is external compressed (lzx/xpress)
> + * 1 - WOF_COMPRESSION_XPRESS4K
> + * 2 - WOF_COMPRESSION_XPRESS8K
> + * 3 - WOF_COMPRESSION_XPRESS16K
> + * 4 - WOF_COMPRESSION_LZX32K
> + */
> +#define NI_FLAG_COMPRESSED_MASK 0x0000000f
> +/* Data attribute is deduplicated */
> +#define NI_FLAG_DEDUPLICATED 0x00000010
> +#define NI_FLAG_EA 0x00000020
> +#define NI_FLAG_DIR 0x00000040
> +#define NI_FLAG_RESIDENT 0x00000080
> +#define NI_FLAG_UPDATE_PARENT 0x00000100
> +// clang-format on
> +
> +struct ntfs_mount_options {
> + struct nls_table *nls;
> +
> + kuid_t fs_uid;
> + kgid_t fs_gid;
> + u16 fs_fmask_inv;
> + u16 fs_dmask_inv;
> +
> + unsigned uid : 1, /* uid was set */
> + gid : 1, /* gid was set */
> + fmask : 1, /* fmask was set */
> + dmask : 1, /*dmask was set*/
> + sys_immutable : 1, /* immutable system files */
> + discard : 1, /* issue discard requests on deletions */
> + sparse : 1, /*create sparse files*/
> + showmeta : 1, /*show meta files*/
> + nohidden : 1, /*do not show hidden files*/
> + force : 1, /*rw mount dirty volume*/
> + no_acs_rules : 1, /*exclude acs rules*/
> + prealloc : 1 /*preallocate space when file is growing*/
> + ;
> +};
> +
> +/* special value to unpack and deallocate*/
> +#define RUN_DEALLOCATE ((struct runs_tree *)(size_t)1)
> +
> +/* TODO: use rb tree instead of array */
> +struct runs_tree {
> + struct ntfs_run *runs_;
> + size_t count; // Currently used size a ntfs_run storage.
> + size_t allocated; // Currently allocated ntfs_run storage size.
> +};
> +
> +struct ntfs_buffers {
> + /* Biggest MFT / smallest cluster = 4096 / 512 = 8 */
> + /* Biggest index / smallest cluster = 4096 / 512 = 8 */
> + struct buffer_head *bh[PAGE_SIZE >> SECTOR_SHIFT];
> + u32 bytes;
> + u32 nbufs;
> + u32 off;
> +};
> +
> +enum ALLOCATE_OPT {
> + ALLOCATE_DEF = 0, // Allocate all clusters
> + ALLOCATE_MFT = 1, // Allocate for MFT
> +};
> +
> +enum bitmap_mutex_classes {
> + BITMAP_MUTEX_CLUSTERS = 0,
> + BITMAP_MUTEX_MFT = 1,
> +};
> +
> +struct wnd_bitmap {
> + struct super_block *sb;
> + struct rw_semaphore rw_lock;
> +
> + struct runs_tree run;
> + size_t nbits;
> +
> + u16 free_holder[8]; // holder for free_bits
> +
> + size_t total_zeroes; // total number of free bits
> + u16 *free_bits; // free bits in each window
> + size_t nwnd;
> + u32 bits_last; // bits in last window
> +
> + struct rb_root start_tree; // extents, sorted by 'start'
> + struct rb_root count_tree; // extents, sorted by 'count + start'
> + size_t count; // extents count
> +
> + /*
> + * -1 Tree is activated but not updated (too many fragments)
> + * 0 - Tree is not activated
> + * 1 - Tree is activated and updated
> + */
> + int uptodated;
> + size_t extent_min; // Minimal extent used while building
> + size_t extent_max; // Upper estimate of biggest free block
> +
> + /* Zone [bit, end) */
> + size_t zone_bit;
> + size_t zone_end;
> +
> + bool set_tail; // not necessary in driver
> + bool inited;
> +};
> +
> +typedef int (*NTFS_CMP_FUNC)(const void *key1, size_t len1, const void *key2,
> + size_t len2, const void *param);
> +
> +enum index_mutex_classed {
> + INDEX_MUTEX_I30 = 0,
> + INDEX_MUTEX_SII = 1,
> + INDEX_MUTEX_SDH = 2,
> + INDEX_MUTEX_SO = 3,
> + INDEX_MUTEX_SQ = 4,
> + INDEX_MUTEX_SR = 5,
> + INDEX_MUTEX_TOTAL
> +};
> +
> +/* This struct works with indexes */
> +struct ntfs_index {
> + struct runs_tree bitmap_run;
> + struct runs_tree alloc_run;
> + /* read/write access to 'bitmap_run'/'alloc_run' while ntfs_readdir */
> + struct rw_semaphore run_lock;
> +
> + /*TODO: remove 'cmp'*/
> + NTFS_CMP_FUNC cmp;
> +
> + u8 index_bits; // log2(root->index_block_size)
> + u8 idx2vbn_bits; // log2(root->index_block_clst)
> + u8 vbn2vbo_bits; // index_block_size < cluster? 9 : cluster_bits
> + u8 type; // index_mutex_classed
> +};
> +
> +/* Set when $LogFile is replaying */
> +#define NTFS_FLAGS_LOG_REPLAYING 0x00000008
> +
> +/* Set when we changed first MFT's which copy must be updated in $MftMirr */
> +#define NTFS_FLAGS_MFTMIRR 0x00001000
> +
> +/* Minimum mft zone */
> +#define NTFS_MIN_MFT_ZONE 100
> +
> +/* ntfs file system in-core superblock data */
> +struct ntfs_sb_info {
> + struct super_block *sb;
> +
> + u32 discard_granularity;
> + u64 discard_granularity_mask_inv; // ~(discard_granularity_mask_inv-1)
> +
> + u32 cluster_size; // bytes per cluster
> + u32 cluster_mask; // == cluster_size - 1
> + u64 cluster_mask_inv; // ~(cluster_size - 1)
> + u32 block_mask; // sb->s_blocksize - 1
> + u32 blocks_per_cluster; // cluster_size / sb->s_blocksize
> +
> + u32 record_size;
> + u32 sector_size;
> + u32 index_size;
> +
> + u8 sector_bits;
> + u8 cluster_bits;
> + u8 record_bits;
> +
> + u64 maxbytes; // Maximum size for normal files
> + u64 maxbytes_sparse; // Maximum size for sparse file
> +
> + u32 flags; // See NTFS_FLAGS_XXX
> +
> + CLST bad_clusters; // The count of marked bad clusters
> +
> + u16 max_bytes_per_attr; // maximum attribute size in record
> + u16 attr_size_tr; // attribute size threshold (320 bytes)
> +
> + /* Records in $Extend */
> + CLST objid_no;
> + CLST quota_no;
> + CLST reparse_no;
> + CLST usn_jrnl_no;
> +
> + struct ATTR_DEF_ENTRY *def_table; // attribute definition table
> + u32 def_entries;
> +
> + struct MFT_REC *new_rec;
> +
> + u16 *upcase;
> +
> + struct {
> + u64 lbo, lbo2;
> + struct ntfs_inode *ni;
> + struct wnd_bitmap bitmap; // $MFT::Bitmap
> + ulong reserved_bitmap;
> + size_t next_free; // The next record to allocate from
> + size_t used;
> + u32 recs_mirr; // Number of records MFTMirr
> + u8 next_reserved;
> + u8 reserved_bitmap_inited;
> + } mft;
> +
> + struct {
> + struct wnd_bitmap bitmap; // $Bitmap::Data
> + CLST next_free_lcn;
> + } used;
> +
> + struct {
> + u64 size; // in bytes
> + u64 blocks; // in blocks
> + u64 ser_num;
> + struct ntfs_inode *ni;
> + __le16 flags; // see VOLUME_FLAG_XXX
> + u8 major_ver;
> + u8 minor_ver;
> + char label[65];
> + bool real_dirty; /* real fs state*/
> + } volume;
> +
> + struct {
> + struct ntfs_index index_sii;
> + struct ntfs_index index_sdh;
> + struct ntfs_inode *ni;
> + u32 next_id;
> + u64 next_off;
> +
> + __le32 def_security_id;
> + } security;
> +
> + struct {
> + struct ntfs_index index_r;
> + struct ntfs_inode *ni;
> + u64 max_size; // 16K
> + } reparse;
> +
> + struct {
> + struct ntfs_index index_o;
> + struct ntfs_inode *ni;
> + } objid;
> +
> + struct {
> + struct mutex mtx_lznt;
> + struct lznt *lznt;
> +#ifdef CONFIG_NTFS3_LZX_XPRESS
> + struct mutex mtx_xpress;
> + struct xpress_decompressor *xpress;
> + struct mutex mtx_lzx;
> + struct lzx_decompressor *lzx;
> +#endif
> + } compress;
> +
> + struct ntfs_mount_options options;
> + struct ratelimit_state msg_ratelimit;
> +};
> +
> +/*
> + * one MFT record(usually 1024 bytes), consists of attributes
> + */
> +struct mft_inode {
> + struct rb_node node;
> + struct ntfs_sb_info *sbi;
> +
> + struct MFT_REC *mrec;
> + struct ntfs_buffers nb;
> +
> + CLST rno;
> + bool dirty;
> +};
> +
> +/* nested class for ntfs_inode::ni_lock */
> +enum ntfs_inode_mutex_lock_class {
> + NTFS_INODE_MUTEX_DIRTY,
> + NTFS_INODE_MUTEX_SECURITY,
> + NTFS_INODE_MUTEX_OBJID,
> + NTFS_INODE_MUTEX_REPARSE,
> + NTFS_INODE_MUTEX_NORMAL,
> + NTFS_INODE_MUTEX_PARENT,
> +};
> +
> +/*
> + * ntfs inode - extends linux inode. consists of one or more mft inodes
> + */
> +struct ntfs_inode {
> + struct mft_inode mi; // base record
> +
> + /*
> + * Valid size: [0 - i_valid) - these range in file contains valid data
> + * Range [i_valid - inode->i_size) - contains 0
> + * Usually i_valid <= inode->i_size
> + */
> + u64 i_valid;
> + struct timespec64 i_crtime;
> +
> + struct mutex ni_lock;
> +
> + /* file attributes from std */
> + enum FILE_ATTRIBUTE std_fa;
> + __le32 std_security_id;
> +
> + /*
> + * tree of mft_inode
> + * not empty when primary MFT record (usually 1024 bytes) can't save all attributes
> + * e.g. file becomes too fragmented or contains a lot of names
> + */
> + struct rb_root mi_tree;
> +
> + /*
> + * This member is used in ntfs_readdir to ensure that all subrecords are loaded
> + */
> + u8 mi_loaded;
> +
> + union {
> + struct ntfs_index dir;
> + struct {
> + struct rw_semaphore run_lock;
> + struct runs_tree run;
> +#ifdef CONFIG_NTFS3_LZX_XPRESS
> + struct page *offs_page;
> +#endif
> + } file;
> + };
> +
> + struct {
> + struct runs_tree run;
> + struct ATTR_LIST_ENTRY *le; // 1K aligned memory
> + size_t size;
> + bool dirty;
> + } attr_list;
> +
> + size_t ni_flags; // NI_FLAG_XXX
> +
> + struct inode vfs_inode;
> +};
> +
> +struct indx_node {
> + struct ntfs_buffers nb;
> + struct INDEX_BUFFER *index;
> +};
> +
> +struct ntfs_fnd {
> + int level;
> + struct indx_node *nodes[20];
> + struct NTFS_DE *de[20];
> + struct NTFS_DE *root_de;
> +};
> +
> +enum REPARSE_SIGN {
> + REPARSE_NONE = 0,
> + REPARSE_COMPRESSED = 1,
> + REPARSE_DEDUPLICATED = 2,
> + REPARSE_LINK = 3
> +};
> +
> +/* functions from attrib.c*/
> +int attr_load_runs(struct ATTRIB *attr, struct ntfs_inode *ni,
> + struct runs_tree *run, const CLST *vcn);
> +int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
> + CLST vcn, CLST lcn, CLST len, CLST *pre_alloc,
> + enum ALLOCATE_OPT opt, CLST *alen, const size_t fr,
> + CLST *new_lcn);
> +int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
> + struct ATTR_LIST_ENTRY *le, struct mft_inode *mi,
> + u64 new_size, struct runs_tree *run,
> + struct ATTRIB **ins_attr, struct page *page);
> +int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
> + const __le16 *name, u8 name_len, struct runs_tree *run,
> + u64 new_size, const u64 *new_valid, bool keep_prealloc,
> + struct ATTRIB **ret);
> +int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
> + CLST *len, bool *new);
> +int attr_data_read_resident(struct ntfs_inode *ni, struct page *page);
> +int attr_data_write_resident(struct ntfs_inode *ni, struct page *page);
> +int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type,
> + const __le16 *name, u8 name_len, struct runs_tree *run,
> + CLST vcn);
> +int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type,
> + const __le16 *name, u8 name_len, struct runs_tree *run,
> + u64 from, u64 to);
> +int attr_wof_frame_info(struct ntfs_inode *ni, struct ATTRIB *attr,
> + struct runs_tree *run, u64 frame, u64 frames,
> + u8 frame_bits, u32 *ondisk_size, u64 *vbo_data);
> +int attr_is_frame_compressed(struct ntfs_inode *ni, struct ATTRIB *attr,
> + CLST frame, CLST *clst_data);
> +int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size,
> + u64 new_valid);
> +int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes);
> +int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes);
> +
> +/* functions from attrlist.c*/
> +void al_destroy(struct ntfs_inode *ni);
> +bool al_verify(struct ntfs_inode *ni);
> +int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr);
> +struct ATTR_LIST_ENTRY *al_enumerate(struct ntfs_inode *ni,
> + struct ATTR_LIST_ENTRY *le);
> +struct ATTR_LIST_ENTRY *al_find_le(struct ntfs_inode *ni,
> + struct ATTR_LIST_ENTRY *le,
> + const struct ATTRIB *attr);
> +struct ATTR_LIST_ENTRY *al_find_ex(struct ntfs_inode *ni,
> + struct ATTR_LIST_ENTRY *le,
> + enum ATTR_TYPE type, const __le16 *name,
> + u8 name_len, const CLST *vcn);
> +int al_add_le(struct ntfs_inode *ni, enum ATTR_TYPE type, const __le16 *name,
> + u8 name_len, CLST svcn, __le16 id, const struct MFT_REF *ref,
> + struct ATTR_LIST_ENTRY **new_le);
> +bool al_remove_le(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le);
> +bool al_delete_le(struct ntfs_inode *ni, enum ATTR_TYPE type, CLST vcn,
> + const __le16 *name, size_t name_len,
> + const struct MFT_REF *ref);
> +int al_update(struct ntfs_inode *ni);
> +static inline size_t al_aligned(size_t size)
> +{
> + return (size + 1023) & ~(size_t)1023;
> +}
> +
> +/* globals from bitfunc.c */
> +bool are_bits_clear(const ulong *map, size_t bit, size_t nbits);
> +bool are_bits_set(const ulong *map, size_t bit, size_t nbits);
> +size_t get_set_bits_ex(const ulong *map, size_t bit, size_t nbits);
> +
> +/* globals from dir.c */
> +int ntfs_utf16_to_nls(struct ntfs_sb_info *sbi, const struct le_str *uni,
> + u8 *buf, int buf_len);
> +int ntfs_nls_to_utf16(struct ntfs_sb_info *sbi, const u8 *name, u32 name_len,
> + struct cpu_str *uni, u32 max_ulen,
> + enum utf16_endian endian);
> +struct inode *dir_search_u(struct inode *dir, const struct cpu_str *uni,
> + struct ntfs_fnd *fnd);
> +bool dir_is_empty(struct inode *dir);
> +extern const struct file_operations ntfs_dir_operations;
> +
> +/* globals from file.c*/
> +int ntfs_getattr(const struct path *path, struct kstat *stat, u32 request_mask,
> + u32 flags);
> +void ntfs_sparse_cluster(struct inode *inode, struct page *page0, CLST vcn,
> + CLST len);
> +int ntfs3_setattr(struct dentry *dentry, struct iattr *attr);
> +int ntfs_file_open(struct inode *inode, struct file *file);
> +int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
> + __u64 start, __u64 len);
> +extern const struct inode_operations ntfs_special_inode_operations;
> +extern const struct inode_operations ntfs_file_inode_operations;
> +extern const struct file_operations ntfs_file_operations;
> +
> +/* globals from frecord.c */
> +void ni_remove_mi(struct ntfs_inode *ni, struct mft_inode *mi);
> +struct ATTR_STD_INFO *ni_std(struct ntfs_inode *ni);
> +struct ATTR_STD_INFO5 *ni_std5(struct ntfs_inode *ni);
> +void ni_clear(struct ntfs_inode *ni);
> +int ni_load_mi_ex(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
> +int ni_load_mi(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le,
> + struct mft_inode **mi);
> +struct ATTRIB *ni_find_attr(struct ntfs_inode *ni, struct ATTRIB *attr,
> + struct ATTR_LIST_ENTRY **entry_o,
> + enum ATTR_TYPE type, const __le16 *name,
> + u8 name_len, const CLST *vcn,
> + struct mft_inode **mi);
> +struct ATTRIB *ni_enum_attr_ex(struct ntfs_inode *ni, struct ATTRIB *attr,
> + struct ATTR_LIST_ENTRY **le,
> + struct mft_inode **mi);
> +struct ATTRIB *ni_load_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
> + const __le16 *name, u8 name_len, CLST vcn,
> + struct mft_inode **pmi);
> +int ni_load_all_mi(struct ntfs_inode *ni);
> +bool ni_add_subrecord(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
> +int ni_remove_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
> + const __le16 *name, size_t name_len, bool base_only,
> + const __le16 *id);
> +int ni_create_attr_list(struct ntfs_inode *ni);
> +int ni_expand_list(struct ntfs_inode *ni);
> +int ni_insert_nonresident(struct ntfs_inode *ni, enum ATTR_TYPE type,
> + const __le16 *name, u8 name_len,
> + const struct runs_tree *run, CLST svcn, CLST len,
> + __le16 flags, struct ATTRIB **new_attr,
> + struct mft_inode **mi);
> +int ni_insert_resident(struct ntfs_inode *ni, u32 data_size,
> + enum ATTR_TYPE type, const __le16 *name, u8 name_len,
> + struct ATTRIB **new_attr, struct mft_inode **mi);
> +int ni_remove_attr_le(struct ntfs_inode *ni, struct ATTRIB *attr,
> + struct ATTR_LIST_ENTRY *le);
> +int ni_delete_all(struct ntfs_inode *ni);
> +struct ATTR_FILE_NAME *ni_fname_name(struct ntfs_inode *ni,
> + const struct cpu_str *uni,
> + const struct MFT_REF *home,
> + struct ATTR_LIST_ENTRY **entry);
> +struct ATTR_FILE_NAME *ni_fname_type(struct ntfs_inode *ni, u8 name_type,
> + struct ATTR_LIST_ENTRY **entry);
> +int ni_new_attr_flags(struct ntfs_inode *ni, enum FILE_ATTRIBUTE new_fa);
> +enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
> + void *buffer);
> +int ni_write_inode(struct inode *inode, int sync, const char *hint);
> +#define _ni_write_inode(i, w) ni_write_inode(i, w, __func__)
> +int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
> + __u64 vbo, __u64 len);
> +int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page);
> +int ni_decompress_file(struct ntfs_inode *ni);
> +int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
> + u32 pages_per_frame);
> +int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
> + u32 pages_per_frame);
> +
> +/* globals from fslog.c */
> +int log_replay(struct ntfs_inode *ni);
> +
> +/* globals from fsntfs.c */
> +bool ntfs_fix_pre_write(struct NTFS_RECORD_HEADER *rhdr, size_t bytes);
> +int ntfs_fix_post_read(struct NTFS_RECORD_HEADER *rhdr, size_t bytes,
> + bool simple);
> +int ntfs_extend_init(struct ntfs_sb_info *sbi);
> +int ntfs_loadlog_and_replay(struct ntfs_inode *ni, struct ntfs_sb_info *sbi);
> +const struct ATTR_DEF_ENTRY *ntfs_query_def(struct ntfs_sb_info *sbi,
> + enum ATTR_TYPE Type);
> +int ntfs_look_for_free_space(struct ntfs_sb_info *sbi, CLST lcn, CLST len,
> + CLST *new_lcn, CLST *new_len,
> + enum ALLOCATE_OPT opt);
> +int ntfs_look_free_mft(struct ntfs_sb_info *sbi, CLST *rno, bool mft,
> + struct ntfs_inode *ni, struct mft_inode **mi);
> +void ntfs_mark_rec_free(struct ntfs_sb_info *sbi, CLST nRecord);
> +int ntfs_clear_mft_tail(struct ntfs_sb_info *sbi, size_t from, size_t to);
> +int ntfs_refresh_zone(struct ntfs_sb_info *sbi);
> +int ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait);
> +enum NTFS_DIRTY_FLAGS {
> + NTFS_DIRTY_CLEAR = 0,
> + NTFS_DIRTY_DIRTY = 1,
> + NTFS_DIRTY_ERROR = 2,
> +};
> +int ntfs_set_state(struct ntfs_sb_info *sbi, enum NTFS_DIRTY_FLAGS dirty);
> +int ntfs_sb_read(struct super_block *sb, u64 lbo, size_t bytes, void *buffer);
> +int ntfs_sb_write(struct super_block *sb, u64 lbo, size_t bytes,
> + const void *buffer, int wait);
> +int ntfs_sb_write_run(struct ntfs_sb_info *sbi, const struct runs_tree *run,
> + u64 vbo, const void *buf, size_t bytes);
> +struct buffer_head *ntfs_bread_run(struct ntfs_sb_info *sbi,
> + const struct runs_tree *run, u64 vbo);
> +int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run,
> + u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb);
> +int ntfs_read_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
> + struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
> + struct ntfs_buffers *nb);
> +int ntfs_get_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
> + u32 bytes, struct ntfs_buffers *nb);
> +int ntfs_write_bh(struct ntfs_sb_info *sbi, struct NTFS_RECORD_HEADER *rhdr,
> + struct ntfs_buffers *nb, int sync);
> +int ntfs_bio_pages(struct ntfs_sb_info *sbi, const struct runs_tree *run,
> + struct page **pages, u32 nr_pages, u64 vbo, u32 bytes,
> + u32 op);
> +int ntfs_bio_fill_1(struct ntfs_sb_info *sbi, const struct runs_tree *run);
> +int ntfs_vbo_to_lbo(struct ntfs_sb_info *sbi, const struct runs_tree *run,
> + u64 vbo, u64 *lbo, u64 *bytes);
> +struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST nRec,
> + bool dir);
> +extern const u8 s_default_security[0x50];
> +bool is_sd_valid(const struct SECURITY_DESCRIPTOR_RELATIVE *sd, u32 len);
> +int ntfs_security_init(struct ntfs_sb_info *sbi);
> +int ntfs_get_security_by_id(struct ntfs_sb_info *sbi, __le32 security_id,
> + struct SECURITY_DESCRIPTOR_RELATIVE **sd,
> + size_t *size);
> +int ntfs_insert_security(struct ntfs_sb_info *sbi,
> + const struct SECURITY_DESCRIPTOR_RELATIVE *sd,
> + u32 size, __le32 *security_id, bool *inserted);
> +int ntfs_reparse_init(struct ntfs_sb_info *sbi);
> +int ntfs_objid_init(struct ntfs_sb_info *sbi);
> +int ntfs_objid_remove(struct ntfs_sb_info *sbi, struct GUID *guid);
> +int ntfs_insert_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
> + const struct MFT_REF *ref);
> +int ntfs_remove_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
> + const struct MFT_REF *ref);
> +void mark_as_free_ex(struct ntfs_sb_info *sbi, CLST lcn, CLST len, bool trim);
> +int run_deallocate(struct ntfs_sb_info *sbi, struct runs_tree *run, bool trim);
> +
> +/* globals from index.c */
> +int indx_used_bit(struct ntfs_index *indx, struct ntfs_inode *ni, size_t *bit);
> +void fnd_clear(struct ntfs_fnd *fnd);
> +struct ntfs_fnd *fnd_get(struct ntfs_index *indx);
> +void fnd_put(struct ntfs_fnd *fnd);
> +void indx_clear(struct ntfs_index *idx);
> +int indx_init(struct ntfs_index *indx, struct ntfs_sb_info *sbi,
> + const struct ATTRIB *attr, enum index_mutex_classed type);
> +struct INDEX_ROOT *indx_get_root(struct ntfs_index *indx, struct ntfs_inode *ni,
> + struct ATTRIB **attr, struct mft_inode **mi);
> +int indx_read(struct ntfs_index *idx, struct ntfs_inode *ni, CLST vbn,
> + struct indx_node **node);
> +int indx_find(struct ntfs_index *indx, struct ntfs_inode *dir,
> + const struct INDEX_ROOT *root, const void *Key, size_t KeyLen,
> + const void *param, int *diff, struct NTFS_DE **entry,
> + struct ntfs_fnd *fnd);
> +int indx_find_sort(struct ntfs_index *indx, struct ntfs_inode *ni,
> + const struct INDEX_ROOT *root, struct NTFS_DE **entry,
> + struct ntfs_fnd *fnd);
> +int indx_find_raw(struct ntfs_index *indx, struct ntfs_inode *ni,
> + const struct INDEX_ROOT *root, struct NTFS_DE **entry,
> + size_t *off, struct ntfs_fnd *fnd);
> +int indx_insert_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
> + const struct NTFS_DE *new_de, const void *param,
> + struct ntfs_fnd *fnd);
> +int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
> + const void *key, u32 key_len, const void *param);
> +int indx_update_dup(struct ntfs_inode *ni, struct ntfs_sb_info *sbi,
> + const struct ATTR_FILE_NAME *fname,
> + const struct NTFS_DUP_INFO *dup, int sync);
> +
> +/* globals from inode.c */
> +struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
> + const struct cpu_str *name);
> +int ntfs_set_size(struct inode *inode, u64 new_size);
> +int reset_log_file(struct inode *inode);
> +int ntfs_get_block(struct inode *inode, sector_t vbn,
> + struct buffer_head *bh_result, int create);
> +int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc);
> +int ntfs_sync_inode(struct inode *inode);
> +int ntfs_flush_inodes(struct super_block *sb, struct inode *i1,
> + struct inode *i2);
> +int inode_write_data(struct inode *inode, const void *data, size_t bytes);
> +int ntfs_create_inode(struct inode *dir, struct dentry *dentry,
> + const struct cpu_str *uni, umode_t mode, dev_t dev,
> + const char *symname, u32 size, int excl,
> + struct ntfs_fnd *fnd, struct inode **new_inode);
> +int ntfs_link_inode(struct inode *inode, struct dentry *dentry);
> +int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry);
> +void ntfs_evict_inode(struct inode *inode);
> +extern const struct inode_operations ntfs_link_inode_operations;
> +extern const struct address_space_operations ntfs_aops;
> +extern const struct address_space_operations ntfs_aops_cmpr;
> +
> +/* globals from name_i.c*/
> +int fill_name_de(struct ntfs_sb_info *sbi, void *buf, const struct qstr *name,
> + const struct cpu_str *uni);
> +struct dentry *ntfs3_get_parent(struct dentry *child);
> +
> +extern const struct inode_operations ntfs_dir_inode_operations;
> +
> +/* globals from record.c */
> +int mi_get(struct ntfs_sb_info *sbi, CLST rno, struct mft_inode **mi);
> +void mi_put(struct mft_inode *mi);
> +int mi_init(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno);
> +int mi_read(struct mft_inode *mi, bool is_mft);
> +struct ATTRIB *mi_enum_attr(struct mft_inode *mi, struct ATTRIB *attr);
> +// TODO: id?
> +struct ATTRIB *mi_find_attr(struct mft_inode *mi, struct ATTRIB *attr,
> + enum ATTR_TYPE type, const __le16 *name,
> + size_t name_len, const __le16 *id);
> +static inline struct ATTRIB *rec_find_attr_le(struct mft_inode *rec,
> + struct ATTR_LIST_ENTRY *le)
> +{
> + return mi_find_attr(rec, NULL, le->type, le_name(le), le->name_len,
> + &le->id);
> +}
> +int mi_write(struct mft_inode *mi, int wait);
> +int mi_format_new(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno,
> + __le16 flags, bool is_mft);
> +void mi_mark_free(struct mft_inode *mi);
> +struct ATTRIB *mi_insert_attr(struct mft_inode *mi, enum ATTR_TYPE type,
> + const __le16 *name, u8 name_len, u32 asize,
> + u16 name_off);
> +
> +bool mi_remove_attr(struct mft_inode *mi, struct ATTRIB *attr);
> +bool mi_resize_attr(struct mft_inode *mi, struct ATTRIB *attr, int bytes);
> +int mi_pack_runs(struct mft_inode *mi, struct ATTRIB *attr,
> + struct runs_tree *run, CLST len);
> +static inline bool mi_is_ref(const struct mft_inode *mi,
> + const struct MFT_REF *ref)
> +{
> + if (le32_to_cpu(ref->low) != mi->rno)
> + return false;
> + if (ref->seq != mi->mrec->seq)
> + return false;
> +
> +#ifdef NTFS3_64BIT_CLUSTER
> + return le16_to_cpu(ref->high) == (mi->rno >> 32);
> +#else
> + return !ref->high;
> +#endif
> +}
> +
> +/* globals from run.c */
> +bool run_lookup_entry(const struct runs_tree *run, CLST vcn, CLST *lcn,
> + CLST *len, size_t *index);
> +void run_truncate(struct runs_tree *run, CLST vcn);
> +void run_truncate_head(struct runs_tree *run, CLST vcn);
> +void run_truncate_around(struct runs_tree *run, CLST vcn);
> +bool run_lookup(const struct runs_tree *run, CLST vcn, size_t *Index);
> +bool run_add_entry(struct runs_tree *run, CLST vcn, CLST lcn, CLST len,
> + bool is_mft);
> +bool run_collapse_range(struct runs_tree *run, CLST vcn, CLST len);
> +bool run_get_entry(const struct runs_tree *run, size_t index, CLST *vcn,
> + CLST *lcn, CLST *len);
> +bool run_is_mapped_full(const struct runs_tree *run, CLST svcn, CLST evcn);
> +
> +int run_pack(const struct runs_tree *run, CLST svcn, CLST len, u8 *run_buf,
> + u32 run_buf_size, CLST *packed_vcns);
> +int run_unpack(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
> + CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
> + u32 run_buf_size);
> +
> +#ifdef NTFS3_CHECK_FREE_CLST
> +int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
> + CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
> + u32 run_buf_size);
> +#else
> +#define run_unpack_ex run_unpack
> +#endif
> +int run_get_highest_vcn(CLST vcn, const u8 *run_buf, u64 *highest_vcn);
> +
> +/* globals from super.c */
> +void *ntfs_set_shared(void *ptr, u32 bytes);
> +void *ntfs_put_shared(void *ptr);
> +void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len);
> +int ntfs_discard(struct ntfs_sb_info *sbi, CLST Lcn, CLST Len);
> +
> +/* globals from ubitmap.c*/
> +void wnd_close(struct wnd_bitmap *wnd);
> +static inline size_t wnd_zeroes(const struct wnd_bitmap *wnd)
> +{
> + return wnd->total_zeroes;
> +}
> +int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits);
> +int wnd_set_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
> +int wnd_set_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
> +bool wnd_is_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
> +bool wnd_is_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
> +
> +/* Possible values for 'flags' 'wnd_find' */
> +#define BITMAP_FIND_MARK_AS_USED 0x01
> +#define BITMAP_FIND_FULL 0x02
> +size_t wnd_find(struct wnd_bitmap *wnd, size_t to_alloc, size_t hint,
> + size_t flags, size_t *allocated);
> +int wnd_extend(struct wnd_bitmap *wnd, size_t new_bits);
> +void wnd_zone_set(struct wnd_bitmap *wnd, size_t Lcn, size_t Len);
> +int ntfs_trim_fs(struct ntfs_sb_info *sbi, struct fstrim_range *range);
> +
> +/* globals from upcase.c */
> +int ntfs_cmp_names(const __le16 *s1, size_t l1, const __le16 *s2, size_t l2,
> + const u16 *upcase, bool bothcase);
> +int ntfs_cmp_names_cpu(const struct cpu_str *uni1, const struct le_str *uni2,
> + const u16 *upcase, bool bothcase);
> +
> +/* globals from xattr.c */
> +#ifdef CONFIG_NTFS3_FS_POSIX_ACL
> +struct posix_acl *ntfs_get_acl(struct inode *inode, int type);
> +int ntfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
> +int ntfs_init_acl(struct inode *inode, struct inode *dir);
> +#else
> +#define ntfs_get_acl NULL
> +#define ntfs_set_acl NULL
> +#endif
> +
> +int ntfs_acl_chmod(struct inode *inode);
> +int ntfs_permission(struct inode *inode, int mask);
> +ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
> +extern const struct xattr_handler *ntfs_xattr_handlers[];
> +
> +/* globals from lznt.c */
> +struct lznt *get_lznt_ctx(int level);
> +size_t compress_lznt(const void *uncompressed, size_t uncompressed_size,
> + void *compressed, size_t compressed_size,
> + struct lznt *ctx);
> +ssize_t decompress_lznt(const void *compressed, size_t compressed_size,
> + void *uncompressed, size_t uncompressed_size);
> +
> +static inline bool is_ntfs3(struct ntfs_sb_info *sbi)
> +{
> + return sbi->volume.major_ver >= 3;
> +}
> +
> +/*(sb->s_flags & SB_ACTIVE)*/
> +static inline bool is_mounted(struct ntfs_sb_info *sbi)
> +{
> + return !!sbi->sb->s_root;
> +}
> +
> +static inline bool ntfs_is_meta_file(struct ntfs_sb_info *sbi, CLST rno)
> +{
> + return rno < MFT_REC_FREE || rno == sbi->objid_no ||
> + rno == sbi->quota_no || rno == sbi->reparse_no ||
> + rno == sbi->usn_jrnl_no;
> +}
> +
> +static inline void ntfs_unmap_page(struct page *page)
> +{
> + kunmap(page);
> + put_page(page);
> +}
> +
> +static inline struct page *ntfs_map_page(struct address_space *mapping,
> + unsigned long index)
> +{
> + struct page *page = read_mapping_page(mapping, index, NULL);
> +
> + if (!IS_ERR(page)) {
> + kmap(page);
> + if (!PageError(page))
> + return page;
> + ntfs_unmap_page(page);
> + return ERR_PTR(-EIO);
> + }
> + return page;
> +}
> +
> +static inline size_t wnd_zone_bit(const struct wnd_bitmap *wnd)
> +{
> + return wnd->zone_bit;
> +}
> +
> +static inline size_t wnd_zone_len(const struct wnd_bitmap *wnd)
> +{
> + return wnd->zone_end - wnd->zone_bit;
> +}
> +
> +static inline void run_init(struct runs_tree *run)
> +{
> + run->runs_ = NULL;
> + run->count = 0;
> + run->allocated = 0;
> +}
> +
> +static inline struct runs_tree *run_alloc(void)
> +{
> + return ntfs_zalloc(sizeof(struct runs_tree));
> +}
> +
> +static inline void run_close(struct runs_tree *run)
> +{
> + ntfs_free(run->runs_);
> + memset(run, 0, sizeof(*run));
> +}
> +
> +static inline void run_free(struct runs_tree *run)
> +{
> + if (run) {
> + ntfs_free(run->runs_);
> + ntfs_free(run);
> + }
> +}
> +
> +static inline bool run_is_empty(struct runs_tree *run)
> +{
> + return !run->count;
> +}
> +
> +/* NTFS uses quad aligned bitmaps */
> +static inline size_t bitmap_size(size_t bits)
> +{
> + return QuadAlign((bits + 7) >> 3);
> +}
> +
> +#define _100ns2seconds 10000000
> +#define SecondsToStartOf1970 0x00000002B6109100
> +
> +#define NTFS_TIME_GRAN 100
> +
> +/*
> + * kernel2nt
> + *
> + * converts in-memory kernel timestamp into nt time
> + */
> +static inline __le64 kernel2nt(const struct timespec64 *ts)
> +{
> + // 10^7 units of 100 nanoseconds one second
> + return cpu_to_le64(_100ns2seconds *
> + (ts->tv_sec + SecondsToStartOf1970) +
> + ts->tv_nsec / NTFS_TIME_GRAN);
> +}
> +
> +/*
> + * nt2kernel
> + *
> + * converts on-disk nt time into kernel timestamp
> + */
> +static inline void nt2kernel(const __le64 tm, struct timespec64 *ts)
> +{
> + u64 t = le64_to_cpu(tm) - _100ns2seconds * SecondsToStartOf1970;
> +
> + // WARNING: do_div changes its first argument(!)
> + ts->tv_nsec = do_div(t, _100ns2seconds) * 100;
> + ts->tv_sec = t;
> +}
> +
> +static inline struct ntfs_sb_info *ntfs_sb(struct super_block *sb)
> +{
> + return sb->s_fs_info;
> +}
> +
> +/* Align up on cluster boundary */
> +static inline u64 ntfs_up_cluster(const struct ntfs_sb_info *sbi, u64 size)
> +{
> + return (size + sbi->cluster_mask) & sbi->cluster_mask_inv;
> +}
> +
> +/* Align up on cluster boundary */
> +static inline u64 ntfs_up_block(const struct super_block *sb, u64 size)
> +{
> + return (size + sb->s_blocksize - 1) & ~(u64)(sb->s_blocksize - 1);
> +}
> +
> +static inline CLST bytes_to_cluster(const struct ntfs_sb_info *sbi, u64 size)
> +{
> + return (size + sbi->cluster_mask) >> sbi->cluster_bits;
> +}
> +
> +static inline u64 bytes_to_block(const struct super_block *sb, u64 size)
> +{
> + return (size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
> +}
> +
> +static inline struct buffer_head *ntfs_bread(struct super_block *sb,
> + sector_t block)
> +{
> + struct buffer_head *bh;
> +
> + bh = sb_bread(sb, block);
> + if (bh)
> + return bh;
> +
> + ntfs_err(sb, "failed to read volume at offset 0x%llx",
> + (u64)block << sb->s_blocksize_bits);
> + return NULL;
> +}
> +
> +static inline bool is_power_of2(size_t v)
> +{
> + return v && !(v & (v - 1));
> +}
> +
> +static inline struct ntfs_inode *ntfs_i(struct inode *inode)
> +{
> + return container_of(inode, struct ntfs_inode, vfs_inode);
> +}
> +
> +static inline bool is_compressed(const struct ntfs_inode *ni)
> +{
> + return (ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) ||
> + (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
> +}
> +
> +static inline int ni_ext_compress_bits(const struct ntfs_inode *ni)
> +{
> + return 0xb + (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
> +}
> +
> +/* bits - 0xc, 0xd, 0xe, 0xf, 0x10 */
> +static inline void ni_set_ext_compress_bits(struct ntfs_inode *ni, u8 bits)
> +{
> + ni->ni_flags |= (bits - 0xb) & NI_FLAG_COMPRESSED_MASK;
> +}
> +
> +static inline bool is_dedup(const struct ntfs_inode *ni)
> +{
> + return ni->ni_flags & NI_FLAG_DEDUPLICATED;
> +}
> +
> +static inline bool is_encrypted(const struct ntfs_inode *ni)
> +{
> + return ni->std_fa & FILE_ATTRIBUTE_ENCRYPTED;
> +}
> +
> +static inline bool is_sparsed(const struct ntfs_inode *ni)
> +{
> + return ni->std_fa & FILE_ATTRIBUTE_SPARSE_FILE;
> +}
> +
> +static inline int is_resident(struct ntfs_inode *ni)
> +{
> + return ni->ni_flags & NI_FLAG_RESIDENT;
> +}
> +
> +static inline void le16_sub_cpu(__le16 *var, u16 val)
> +{
> + *var = cpu_to_le16(le16_to_cpu(*var) - val);
> +}
> +
> +static inline void le32_sub_cpu(__le32 *var, u32 val)
> +{
> + *var = cpu_to_le32(le32_to_cpu(*var) - val);
> +}
> +
> +static inline void nb_put(struct ntfs_buffers *nb)
> +{
> + u32 i, nbufs = nb->nbufs;
> +
> + if (!nbufs)
> + return;
> +
> + for (i = 0; i < nbufs; i++)
> + put_bh(nb->bh[i]);
> + nb->nbufs = 0;
> +}
> +
> +static inline void put_indx_node(struct indx_node *in)
> +{
> + if (!in)
> + return;
> +
> + ntfs_free(in->index);
> + nb_put(&in->nb);
> + ntfs_free(in);
> +}
> +
> +static inline void mi_clear(struct mft_inode *mi)
> +{
> + nb_put(&mi->nb);
> + ntfs_free(mi->mrec);
> + mi->mrec = NULL;
> +}
> +
> +static inline void ni_lock(struct ntfs_inode *ni)
> +{
> + mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_NORMAL);
> +}
> +
> +static inline void ni_lock_dir(struct ntfs_inode *ni)
> +{
> + mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_PARENT);
> +}
> +
> +static inline void ni_unlock(struct ntfs_inode *ni)
> +{
> + mutex_unlock(&ni->ni_lock);
> +}
> +
> +static inline int ni_trylock(struct ntfs_inode *ni)
> +{
> + return mutex_trylock(&ni->ni_lock);
> +}
> +
> +static inline int attr_load_runs_attr(struct ntfs_inode *ni,
> + struct ATTRIB *attr,
> + struct runs_tree *run, CLST vcn)
> +{
> + return attr_load_runs_vcn(ni, attr->type, attr_name(attr),
> + attr->name_len, run, vcn);
> +}
> +
> +static inline void le64_sub_cpu(__le64 *var, u64 val)
> +{
> + *var = cpu_to_le64(le64_to_cpu(*var) - val);
> +}
> diff --git a/fs/ntfs3/upcase.c b/fs/ntfs3/upcase.c
> new file mode 100644
> index 000000000000..270458fc70df
> --- /dev/null
> +++ b/fs/ntfs3/upcase.c
> @@ -0,0 +1,100 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + *
> + * Copyright (C) 2019-2020 Paragon Software GmbH, All rights reserved.
> + *
> + */
> +#include <linux/blkdev.h>
> +#include <linux/buffer_head.h>
> +#include <linux/module.h>
> +#include <linux/nls.h>
> +
> +#include "debug.h"
> +#include "ntfs.h"
> +#include "ntfs_fs.h"
> +
> +static inline u16 upcase_unicode_char(const u16 *upcase, u16 chr)
> +{
> + if (chr < 'a')
> + return chr;
> +
> + if (chr <= 'z')
> + return chr - ('a' - 'A');
> +
> + return upcase[chr];
> +}
> +
> +/* Thanks Kari Argillander <kari.argillander@...il.com> for idea and implementation 'bothcase' */
> +int ntfs_cmp_names(const __le16 *s1, size_t l1, const __le16 *s2, size_t l2,
> + const u16 *upcase, bool bothcase)
> +{
> + int diff1 = 0;
> + int diff2;
> + size_t len = l1 < l2 ? l1 : l2;
> +
> + if (!bothcase && upcase)
> + goto case_insentive;
> +
> + for (; len; s1++, s2++, len--) {
> + diff1 = le16_to_cpu(*s1) - le16_to_cpu(*s2);
> + if (diff1) {
> + if (bothcase && upcase)
> + goto case_insentive;
> +
> + return diff1;
> + }
> + }
> + return l1 - l2;
> +
> +case_insentive:
> + for (; len; s1++, s2++, len--) {
> + diff2 = upcase_unicode_char(upcase, le16_to_cpu(*s1)) -
> + upcase_unicode_char(upcase, le16_to_cpu(*s2));
> + if (diff2)
> + return diff2;
> + }
> +
> + if (bothcase && diff1)
> + return diff1;
> +
> + return l1 - l2;
> +}
> +
> +int ntfs_cmp_names_cpu(const struct cpu_str *uni1, const struct le_str *uni2,
> + const u16 *upcase, bool bothcase)
> +{
> + const u16 *s1 = uni1->name;
> + const __le16 *s2 = uni2->name;
> + size_t l1 = uni1->len;
> + size_t l2 = uni2->len;
> + size_t len = l1 < l2 ? l1 : l2;
> + int diff1 = 0;
> + int diff2;
> +
> + if (!bothcase && upcase)
> + goto case_insentive;
> +
> + for (; len; s1++, s2++, len--) {
> + diff1 = *s1 - le16_to_cpu(*s2);
> + if (diff1) {
> + if (bothcase && upcase)
> + goto case_insentive;
> +
> + return diff1;
> + }
> + }
> + return l1 - l2;
> +
> +case_insentive:
> + for (; len; s1++, s2++, len--) {
> + diff2 = upcase_unicode_char(upcase, *s1) -
> + upcase_unicode_char(upcase, le16_to_cpu(*s2));
> + if (diff2)
> + return diff2;
> + }
> +
> + if (bothcase && diff1)
> + return diff1;
> +
> + return l1 - l2;
> +}
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