/* SPDX-License-Identifier: GPL-2.0 */
/*
 * HFS/HFS+ common definitions, inline functions,
 * and shared functionality.
 */

#ifndef _HFS_COMMON_H_
#define _HFS_COMMON_H_

#ifdef pr_fmt
#undef pr_fmt
#endif

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define hfs_dbg(fmt, ...)                                                       \
        pr_debug("pid %d:%s:%d %s(): " fmt,                                     \
                 current->pid, __FILE__, __LINE__, __func__, ##__VA_ARGS__)     \

/*
 * Format of structures on disk
 * Information taken from Apple Technote #1150 (HFS Plus Volume Format)
 */

/* offsets to various blocks */
#define HFS_DD_BLK                      0       /* Driver Descriptor block */
#define HFS_PMAP_BLK                    1       /* First block of partition map */
#define HFS_MDB_BLK                     2       /* Block (w/i partition) of MDB */

/* magic numbers for various disk blocks */
#define HFS_DRVR_DESC_MAGIC             0x4552  /* "ER": driver descriptor map */
#define HFS_OLD_PMAP_MAGIC              0x5453  /* "TS": old-type partition map */
#define HFS_NEW_PMAP_MAGIC              0x504D  /* "PM": new-type partition map */
#define HFS_SUPER_MAGIC                 0x4244  /* "BD": HFS MDB (super block) */
#define HFS_MFS_SUPER_MAGIC             0xD2D7  /* MFS MDB (super block) */

#define HFSPLUS_VOLHEAD_SIG             0x482b
#define HFSPLUS_VOLHEAD_SIGX            0x4858
#define HFSPLUS_SUPER_MAGIC             0x482b

#define HFSP_WRAP_MAGIC                 0x4244
#define HFSP_WRAP_ATTRIB_SLOCK          0x8000
#define HFSP_WRAP_ATTRIB_SPARED         0x0200

#define HFSP_WRAPOFF_SIG                0x00
#define HFSP_WRAPOFF_ATTRIB             0x0A
#define HFSP_WRAPOFF_ABLKSIZE           0x14
#define HFSP_WRAPOFF_ABLKSTART          0x1C
#define HFSP_WRAPOFF_EMBEDSIG           0x7C
#define HFSP_WRAPOFF_EMBEDEXT           0x7E

#define HFSP_HARDLINK_TYPE              0x686c6e6b      /* 'hlnk' */
#define HFSP_HFSPLUS_CREATOR            0x6866732b      /* 'hfs+' */

#define HFSP_SYMLINK_TYPE               0x736c6e6b      /* 'slnk' */
#define HFSP_SYMLINK_CREATOR            0x72686170      /* 'rhap' */

#define HFSP_MOUNT_VERSION              0x482b4c78      /* 'H+Lx' */

#define HFSP_HIDDENDIR_NAME \
        "\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80HFS+ Private Data"

/* various FIXED size parameters */
#define HFS_SECTOR_SIZE                 512     /* size of an HFS sector */
#define HFS_SECTOR_SIZE_BITS            9       /* log_2(HFS_SECTOR_SIZE) */
#define HFS_MAX_VALENCE                 32767U

#define HFSPLUS_SECTOR_SIZE             HFS_SECTOR_SIZE
#define HFSPLUS_SECTOR_SHIFT            HFS_SECTOR_SIZE_BITS
#define HFSPLUS_VOLHEAD_SECTOR          2
#define HFSPLUS_MIN_VERSION             4
#define HFSPLUS_CURRENT_VERSION         5

#define HFS_NAMELEN                     31      /* maximum length of an HFS filename */
#define HFS_MAX_NAMELEN                 128

#define HFSPLUS_MAX_STRLEN              255
#define HFSPLUS_ATTR_MAX_STRLEN         127

/* Meanings of the drAtrb field of the MDB,
 * Reference: _Inside Macintosh: Files_ p. 2-61
 */
#define HFS_SB_ATTRIB_HLOCK     (1 << 7)
#define HFS_SB_ATTRIB_UNMNT     (1 << 8)
#define HFS_SB_ATTRIB_SPARED    (1 << 9)
#define HFS_SB_ATTRIB_INCNSTNT  (1 << 11)
#define HFS_SB_ATTRIB_SLOCK     (1 << 15)

/* values for hfs_cat_rec.cdrType */
#define HFS_CDR_DIR             0x01    /* folder (directory) */
#define HFS_CDR_FIL             0x02    /* file */
#define HFS_CDR_THD             0x03    /* folder (directory) thread */
#define HFS_CDR_FTH             0x04    /* file thread */

/* legal values for hfs_ext_key.FkType and hfs_file.fork */
#define HFS_FK_DATA             0x00
#define HFS_FK_RSRC             0xFF

/* bits in hfs_fil_entry.Flags */
#define HFS_FIL_LOCK            0x01    /* locked */
#define HFS_FIL_THD             0x02    /* file thread */
#define HFS_FIL_DOPEN           0x04    /* data fork open */
#define HFS_FIL_ROPEN           0x08    /* resource fork open */
#define HFS_FIL_DIR             0x10    /* directory (always clear) */
#define HFS_FIL_NOCOPY          0x40    /* copy-protected file */
#define HFS_FIL_USED            0x80    /* open */

/* bits in hfs_dir_entry.Flags. dirflags is 16 bits. */
#define HFS_DIR_LOCK            0x01    /* locked */
#define HFS_DIR_THD             0x02    /* directory thread */
#define HFS_DIR_INEXPFOLDER     0x04    /* in a shared area */
#define HFS_DIR_MOUNTED         0x08    /* mounted */
#define HFS_DIR_DIR             0x10    /* directory (always set) */
#define HFS_DIR_EXPFOLDER       0x20    /* share point */

/* bits hfs_finfo.fdFlags */
#define HFS_FLG_INITED          0x0100
#define HFS_FLG_LOCKED          0x1000
#define HFS_FLG_INVISIBLE       0x4000

/* Some special File ID numbers */
#define HFS_POR_CNID            1       /* Parent Of the Root */
#define HFSPLUS_POR_CNID        HFS_POR_CNID
#define HFS_ROOT_CNID           2       /* ROOT directory */
#define HFSPLUS_ROOT_CNID       HFS_ROOT_CNID
#define HFS_EXT_CNID            3       /* EXTents B-tree */
#define HFSPLUS_EXT_CNID        HFS_EXT_CNID
#define HFS_CAT_CNID            4       /* CATalog B-tree */
#define HFSPLUS_CAT_CNID        HFS_CAT_CNID
#define HFS_BAD_CNID            5       /* BAD blocks file */
#define HFSPLUS_BAD_CNID        HFS_BAD_CNID
#define HFS_ALLOC_CNID          6       /* ALLOCation file (HFS+) */
#define HFSPLUS_ALLOC_CNID      HFS_ALLOC_CNID
#define HFS_START_CNID          7       /* STARTup file (HFS+) */
#define HFSPLUS_START_CNID      HFS_START_CNID
#define HFS_ATTR_CNID           8       /* ATTRibutes file (HFS+) */
#define HFSPLUS_ATTR_CNID       HFS_ATTR_CNID
#define HFS_EXCH_CNID           15      /* ExchangeFiles temp id */
#define HFSPLUS_EXCH_CNID       HFS_EXCH_CNID
#define HFS_FIRSTUSER_CNID      16      /* first available user id */
#define HFSPLUS_FIRSTUSER_CNID  HFS_FIRSTUSER_CNID

/*======== HFS/HFS+ structures as they appear on the disk ========*/

typedef __be32 hfsplus_cnid;
typedef __be16 hfsplus_unichr;

/* Pascal-style string of up to 31 characters */
struct hfs_name {
        u8 len;
        u8 name[HFS_NAMELEN];
} __packed;

/* A "string" as used in filenames, etc. */
struct hfsplus_unistr {
        __be16 length;
        hfsplus_unichr unicode[HFSPLUS_MAX_STRLEN];
} __packed;

/*
 * A "string" is used in attributes file
 * for name of extended attribute
 */
struct hfsplus_attr_unistr {
        __be16 length;
        hfsplus_unichr unicode[HFSPLUS_ATTR_MAX_STRLEN];
} __packed;

struct hfs_extent {
        __be16 block;
        __be16 count;
};
typedef struct hfs_extent hfs_extent_rec[3];

/* A single contiguous area of a file */
struct hfsplus_extent {
        __be32 start_block;
        __be32 block_count;
} __packed;
typedef struct hfsplus_extent hfsplus_extent_rec[8];

/* Information for a "Fork" in a file */
struct hfsplus_fork_raw {
        __be64 total_size;
        __be32 clump_size;
        __be32 total_blocks;
        hfsplus_extent_rec extents;
} __packed;

struct hfs_mdb {
        __be16 drSigWord;               /* Signature word indicating fs type */
        __be32 drCrDate;                /* fs creation date/time */
        __be32 drLsMod;                 /* fs modification date/time */
        __be16 drAtrb;                  /* fs attributes */
        __be16 drNmFls;                 /* number of files in root directory */
        __be16 drVBMSt;                 /* location (in 512-byte blocks)
                                           of the volume bitmap */
        __be16 drAllocPtr;              /* location (in allocation blocks)
                                           to begin next allocation search */
        __be16 drNmAlBlks;              /* number of allocation blocks */
        __be32 drAlBlkSiz;              /* bytes in an allocation block */
        __be32 drClpSiz;                /* clumpsize, the number of bytes to
                                           allocate when extending a file */
        __be16 drAlBlSt;                /* location (in 512-byte blocks)
                                           of the first allocation block */
        __be32 drNxtCNID;               /* CNID to assign to the next
                                           file or directory created */
        __be16 drFreeBks;               /* number of free allocation blocks */
        u8 drVN[28];                    /* the volume label */
        __be32 drVolBkUp;               /* fs backup date/time */
        __be16 drVSeqNum;               /* backup sequence number */
        __be32 drWrCnt;                 /* fs write count */
        __be32 drXTClpSiz;              /* clumpsize for the extents B-tree */
        __be32 drCTClpSiz;              /* clumpsize for the catalog B-tree */
        __be16 drNmRtDirs;              /* number of directories in
                                           the root directory */
        __be32 drFilCnt;                /* number of files in the fs */
        __be32 drDirCnt;                /* number of directories in the fs */
        u8 drFndrInfo[32];              /* data used by the Finder */
        __be16 drEmbedSigWord;          /* embedded volume signature */
        __be32 drEmbedExtent;           /* starting block number (xdrStABN)
                                           and number of allocation blocks
                                           (xdrNumABlks) occupied by embedded
                                           volume */
        __be32 drXTFlSize;              /* bytes in the extents B-tree */
        hfs_extent_rec drXTExtRec;      /* extents B-tree's first 3 extents */
        __be32 drCTFlSize;              /* bytes in the catalog B-tree */
        hfs_extent_rec drCTExtRec;      /* catalog B-tree's first 3 extents */
} __packed;

/* HFS+ Volume Header */
struct hfsplus_vh {
        __be16 signature;
        __be16 version;
        __be32 attributes;
        __be32 last_mount_vers;
        u32 reserved;

        __be32 create_date;
        __be32 modify_date;
        __be32 backup_date;
        __be32 checked_date;

        __be32 file_count;
        __be32 folder_count;

        __be32 blocksize;
        __be32 total_blocks;
        __be32 free_blocks;

        __be32 next_alloc;
        __be32 rsrc_clump_sz;
        __be32 data_clump_sz;
        hfsplus_cnid next_cnid;

        __be32 write_count;
        __be64 encodings_bmp;

        u32 finder_info[8];

        struct hfsplus_fork_raw alloc_file;
        struct hfsplus_fork_raw ext_file;
        struct hfsplus_fork_raw cat_file;
        struct hfsplus_fork_raw attr_file;
        struct hfsplus_fork_raw start_file;
} __packed;

/* HFS+ volume attributes */
#define HFSPLUS_VOL_UNMNT               (1 << 8)
#define HFSPLUS_VOL_SPARE_BLK           (1 << 9)
#define HFSPLUS_VOL_NOCACHE             (1 << 10)
#define HFSPLUS_VOL_INCNSTNT            (1 << 11)
#define HFSPLUS_VOL_NODEID_REUSED       (1 << 12)
#define HFSPLUS_VOL_JOURNALED           (1 << 13)
#define HFSPLUS_VOL_SOFTLOCK            (1 << 15)
#define HFSPLUS_VOL_UNUSED_NODE_FIX     (1 << 31)

struct hfs_point {
        __be16 v;
        __be16 h;
} __packed;

typedef struct hfs_point hfsp_point;

struct hfs_rect {
        __be16 top;
        __be16 left;
        __be16 bottom;
        __be16 right;
} __packed;

typedef struct hfs_rect hfsp_rect;

struct hfs_finfo {
        __be32 fdType;
        __be32 fdCreator;
        __be16 fdFlags;
        struct hfs_point fdLocation;
        __be16 fdFldr;
} __packed;

typedef struct hfs_finfo FInfo;

struct hfs_fxinfo {
        __be16 fdIconID;
        u8 fdUnused[8];
        __be16 fdComment;
        __be32 fdPutAway;
} __packed;

typedef struct hfs_fxinfo FXInfo;

struct hfs_dinfo {
        struct hfs_rect frRect;
        __be16 frFlags;
        struct hfs_point frLocation;
        __be16 frView;
} __packed;

typedef struct hfs_dinfo DInfo;

struct hfs_dxinfo {
        struct hfs_point frScroll;
        __be32 frOpenChain;
        __be16 frUnused;
        __be16 frComment;
        __be32 frPutAway;
} __packed;

typedef struct hfs_dxinfo DXInfo;

union hfs_finder_info {
        struct {
                struct hfs_finfo finfo;
                struct hfs_fxinfo fxinfo;
        } file;
        struct {
                struct hfs_dinfo dinfo;
                struct hfs_dxinfo dxinfo;
        } dir;
} __packed;

/* The key used in the catalog b-tree: */
struct hfs_cat_key {
        u8 key_len;             /* number of bytes in the key */
        u8 reserved;            /* padding */
        __be32 ParID;           /* CNID of the parent dir */
        struct hfs_name CName;  /* The filename of the entry */
} __packed;

/* HFS+ catalog entry key */
struct hfsplus_cat_key {
        __be16 key_len;
        hfsplus_cnid parent;
        struct hfsplus_unistr name;
} __packed;

#define HFSPLUS_CAT_KEYLEN      (sizeof(struct hfsplus_cat_key))

/* The key used in the extents b-tree: */
struct hfs_ext_key {
        u8 key_len;             /* number of bytes in the key */
        u8 FkType;              /* HFS_FK_{DATA,RSRC} */
        __be32 FNum;            /* The File ID of the file */
        __be16 FABN;            /* allocation blocks number*/
} __packed;

/* HFS+ extents tree key */
struct hfsplus_ext_key {
        __be16 key_len;
        u8 fork_type;
        u8 pad;
        hfsplus_cnid cnid;
        __be32 start_block;
} __packed;

#define HFSPLUS_EXT_KEYLEN      sizeof(struct hfsplus_ext_key)

typedef union hfs_btree_key {
        u8 key_len;                     /* number of bytes in the key */
        struct hfs_cat_key cat;
        struct hfs_ext_key ext;
} hfs_btree_key;

#define HFS_MAX_CAT_KEYLEN      (sizeof(struct hfs_cat_key) - sizeof(u8))
#define HFS_MAX_EXT_KEYLEN      (sizeof(struct hfs_ext_key) - sizeof(u8))

typedef union hfs_btree_key btree_key;

/* The catalog record for a file */
struct hfs_cat_file {
        s8 type;                        /* The type of entry */
        u8 reserved;
        u8 Flags;                       /* Flags such as read-only */
        s8 Typ;                         /* file version number = 0 */
        struct hfs_finfo UsrWds;        /* data used by the Finder */
        __be32 FlNum;                   /* The CNID */
        __be16 StBlk;                   /* obsolete */
        __be32 LgLen;                   /* The logical EOF of the data fork*/
        __be32 PyLen;                   /* The physical EOF of the data fork */
        __be16 RStBlk;                  /* obsolete */
        __be32 RLgLen;                  /* The logical EOF of the rsrc fork */
        __be32 RPyLen;                  /* The physical EOF of the rsrc fork */
        __be32 CrDat;                   /* The creation date */
        __be32 MdDat;                   /* The modified date */
        __be32 BkDat;                   /* The last backup date */
        struct hfs_fxinfo FndrInfo;     /* more data for the Finder */
        __be16 ClpSize;                 /* number of bytes to allocate
                                           when extending files */
        hfs_extent_rec ExtRec;          /* first extent record
                                           for the data fork */
        hfs_extent_rec RExtRec;         /* first extent record
                                           for the resource fork */
        u32 Resrv;                      /* reserved by Apple */
} __packed;

/* the catalog record for a directory */
struct hfs_cat_dir {
        s8 type;                        /* The type of entry */
        u8 reserved;
        __be16 Flags;                   /* flags */
        __be16 Val;                     /* Valence: number of files and
                                           dirs in the directory */
        __be32 DirID;                   /* The CNID */
        __be32 CrDat;                   /* The creation date */
        __be32 MdDat;                   /* The modification date */
        __be32 BkDat;                   /* The last backup date */
        struct hfs_dinfo UsrInfo;       /* data used by the Finder */
        struct hfs_dxinfo FndrInfo;     /* more data used by Finder */
        u8 Resrv[16];                   /* reserved by Apple */
} __packed;

/* the catalog record for a thread */
struct hfs_cat_thread {
        s8 type;                        /* The type of entry */
        u8 reserved[9];                 /* reserved by Apple */
        __be32 ParID;                   /* CNID of parent directory */
        struct hfs_name CName;          /* The name of this entry */
}  __packed;

/* A catalog tree record */
typedef union hfs_cat_rec {
        s8 type;                        /* The type of entry */
        struct hfs_cat_file file;
        struct hfs_cat_dir dir;
        struct hfs_cat_thread thread;
} hfs_cat_rec;

/* POSIX permissions */
struct hfsplus_perm {
        __be32 owner;
        __be32 group;
        u8  rootflags;
        u8  userflags;
        __be16 mode;
        __be32 dev;
} __packed;

#define HFSPLUS_FLG_NODUMP      0x01
#define HFSPLUS_FLG_IMMUTABLE   0x02
#define HFSPLUS_FLG_APPEND      0x04

/* HFS/HFS+ BTree node descriptor */
struct hfs_bnode_desc {
        __be32 next;            /* (V) Number of the next node at this level */
        __be32 prev;            /* (V) Number of the prev node at this level */
        u8 type;                /* (F) The type of node */
        u8 height;              /* (F) The level of this node (leaves=1) */
        __be16 num_recs;        /* (V) The number of records in this node */
        u16 reserved;
} __packed;

/* HFS/HFS+ BTree node types */
#define HFS_NODE_INDEX  0x00    /* An internal (index) node */
#define HFS_NODE_HEADER 0x01    /* The tree header node (node 0) */
#define HFS_NODE_MAP    0x02    /* Holds part of the bitmap of used nodes */
#define HFS_NODE_LEAF   0xFF    /* A leaf (ndNHeight==1) node */

/* HFS/HFS+ BTree header */
struct hfs_btree_header_rec {
        __be16 depth;           /* (V) The number of levels in this B-tree */
        __be32 root;            /* (V) The node number of the root node */
        __be32 leaf_count;      /* (V) The number of leaf records */
        __be32 leaf_head;       /* (V) The number of the first leaf node */
        __be32 leaf_tail;       /* (V) The number of the last leaf node */
        __be16 node_size;       /* (F) The number of bytes in a node (=512) */
        __be16 max_key_len;     /* (F) The length of a key in an index node */
        __be32 node_count;      /* (V) The total number of nodes */
        __be32 free_nodes;      /* (V) The number of unused nodes */
        u16 reserved1;
        __be32 clump_size;      /* (F) clump size. not usually used. */
        u8 btree_type;          /* (F) BTree type */
        u8 key_type;
        __be32 attributes;      /* (F) attributes */
        u32 reserved3[16];
} __packed;

/* BTree attributes */
#define BTREE_ATTR_BADCLOSE     0x00000001      /* b-tree not closed properly. not
                                                   used by hfsplus. */
#define HFS_TREE_BIGKEYS        0x00000002      /* key length is u16 instead of u8.
                                                   used by hfsplus. */
#define HFS_TREE_VARIDXKEYS     0x00000004      /* variable key length instead of
                                                   max key length. use din catalog
                                                   b-tree but not in extents
                                                   b-tree (hfsplus). */

/* HFS+ BTree misc info */
#define HFSPLUS_TREE_HEAD                       0
#define HFSPLUS_NODE_MXSZ                       32768
#define HFSPLUS_ATTR_TREE_NODE_SIZE             8192
#define HFSPLUS_BTREE_HDR_NODE_RECS_COUNT       3
#define HFSPLUS_BTREE_HDR_USER_BYTES            128

/* btree key type */
#define HFSPLUS_KEY_CASEFOLDING         0xCF    /* case-insensitive */
#define HFSPLUS_KEY_BINARY              0xBC    /* case-sensitive */

/* HFS+ folder data (part of an hfsplus_cat_entry) */
struct hfsplus_cat_folder {
        __be16 type;
        __be16 flags;
        __be32 valence;
        hfsplus_cnid id;
        __be32 create_date;
        __be32 content_mod_date;
        __be32 attribute_mod_date;
        __be32 access_date;
        __be32 backup_date;
        struct hfsplus_perm permissions;
        struct_group_attr(info, __packed,
                DInfo user_info;
                DXInfo finder_info;
        );
        __be32 text_encoding;
        __be32 subfolders;      /* Subfolder count in HFSX. Reserved in HFS+. */
} __packed;

/* HFS+ file data (part of a cat_entry) */
struct hfsplus_cat_file {
        __be16 type;
        __be16 flags;
        u32 reserved1;
        hfsplus_cnid id;
        __be32 create_date;
        __be32 content_mod_date;
        __be32 attribute_mod_date;
        __be32 access_date;
        __be32 backup_date;
        struct hfsplus_perm permissions;
        struct_group_attr(info, __packed,
                FInfo user_info;
                FXInfo finder_info;
        );
        __be32 text_encoding;
        u32 reserved2;

        struct hfsplus_fork_raw data_fork;
        struct hfsplus_fork_raw rsrc_fork;
} __packed;

/* File and folder flag bits */
#define HFSPLUS_FILE_LOCKED             0x0001
#define HFSPLUS_FILE_THREAD_EXISTS      0x0002
#define HFSPLUS_XATTR_EXISTS            0x0004
#define HFSPLUS_ACL_EXISTS              0x0008
#define HFSPLUS_HAS_FOLDER_COUNT        0x0010  /* Folder has subfolder count
                                                 * (HFSX only) */

/* HFS+ catalog thread (part of a cat_entry) */
struct hfsplus_cat_thread {
        __be16 type;
        s16 reserved;
        hfsplus_cnid parentID;
        struct hfsplus_unistr nodeName;
} __packed;

#define HFSPLUS_MIN_THREAD_SZ           10

/* A data record in the catalog tree */
typedef union {
        __be16 type;
        struct hfsplus_cat_folder folder;
        struct hfsplus_cat_file file;
        struct hfsplus_cat_thread thread;
} __packed hfsplus_cat_entry;

/* HFS+ catalog entry type */
#define HFSPLUS_FOLDER          0x0001
#define HFSPLUS_FILE            0x0002
#define HFSPLUS_FOLDER_THREAD   0x0003
#define HFSPLUS_FILE_THREAD     0x0004

#define HFSPLUS_XATTR_FINDER_INFO_NAME  "com.apple.FinderInfo"
#define HFSPLUS_XATTR_ACL_NAME          "com.apple.system.Security"

#define HFSPLUS_ATTR_INLINE_DATA        0x10
#define HFSPLUS_ATTR_FORK_DATA          0x20
#define HFSPLUS_ATTR_EXTENTS            0x30

/* HFS+ attributes tree key */
struct hfsplus_attr_key {
        __be16 key_len;
        __be16 pad;
        hfsplus_cnid cnid;
        __be32 start_block;
        struct hfsplus_attr_unistr key_name;
} __packed;

#define HFSPLUS_ATTR_KEYLEN     sizeof(struct hfsplus_attr_key)

/* HFS+ fork data attribute */
struct hfsplus_attr_fork_data {
        __be32 record_type;
        __be32 reserved;
        struct hfsplus_fork_raw the_fork;
} __packed;

/* HFS+ extension attribute */
struct hfsplus_attr_extents {
        __be32 record_type;
        __be32 reserved;
        struct hfsplus_extent extents;
} __packed;

#define HFSPLUS_MAX_INLINE_DATA_SIZE    3802

/* HFS+ attribute inline data */
struct hfsplus_attr_inline_data {
        __be32 record_type;
        __be32 reserved1;
        u8 reserved2[6];
        __be16 length;
        u8 raw_bytes[HFSPLUS_MAX_INLINE_DATA_SIZE];
} __packed;

/* A data record in the attributes tree */
typedef union {
        __be32 record_type;
        struct hfsplus_attr_fork_data fork_data;
        struct hfsplus_attr_extents extents;
        struct hfsplus_attr_inline_data inline_data;
} __packed hfsplus_attr_entry;

/* HFS+ generic BTree key */
typedef union {
        __be16 key_len;
        struct hfsplus_cat_key cat;
        struct hfsplus_ext_key ext;
        struct hfsplus_attr_key attr;
} __packed hfsplus_btree_key;

#endif /* _HFS_COMMON_H_ */