cregit-Linux how code gets into the kernel

Release 4.10 fs/hfsplus/hfsplus_raw.h

Directory: fs/hfsplus
/*
 *  linux/include/linux/hfsplus_raw.h
 *
 * Copyright (C) 1999
 * Brad Boyer (flar@pants.nu)
 * (C) 2003 Ardis Technologies <roman@ardistech.com>
 *
 * Format of structures on disk
 * Information taken from Apple Technote #1150 (HFS Plus Volume Format)
 *
 */

#ifndef _LINUX_HFSPLUS_RAW_H

#define _LINUX_HFSPLUS_RAW_H

#include <linux/types.h>

/* Some constants */

#define HFSPLUS_SECTOR_SIZE        512

#define HFSPLUS_SECTOR_SHIFT         9

#define HFSPLUS_VOLHEAD_SECTOR       2

#define HFSPLUS_VOLHEAD_SIG     0x482b

#define HFSPLUS_VOLHEAD_SIGX    0x4858

#define HFSPLUS_SUPER_MAGIC     0x482b

#define HFSPLUS_MIN_VERSION          4

#define HFSPLUS_CURRENT_VERSION      5


#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_HIDDENDIR_NAME \
	"\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80HFS+ Private Data"


#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' */

/* Structures used on disk */


typedef __be32 hfsplus_cnid;

typedef __be16 hfsplus_unichr;


#define HFSPLUS_MAX_STRLEN 255

#define HFSPLUS_ATTR_MAX_STRLEN 127

/* 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;

/* 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

/* 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;

/* 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)

/* HFS+ BTree node descriptor */

struct hfs_bnode_desc {
	
__be32 next;
	
__be32 prev;
	
s8 type;
	
u8 height;
	
__be16 num_recs;
	
u16 reserved;
} 
__packed;

/* 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+ BTree header */

struct hfs_btree_header_rec {
	
__be16 depth;
	
__be32 root;
	
__be32 leaf_count;
	
__be32 leaf_head;
	
__be32 leaf_tail;
	
__be16 node_size;
	
__be16 max_key_len;
	
__be32 node_count;
	
__be32 free_nodes;
	
u16 reserved1;
	
__be32 clump_size;
	
u8 btree_type;
	
u8 key_type;
	
__be32 attributes;
	
u32 reserved3[16];
} 
__packed;

/* BTree attributes */

#define HFS_TREE_BIGKEYS	2

#define HFS_TREE_VARIDXKEYS	4

/* 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

/* Some special File ID numbers (stolen from hfs.h) */

#define HFSPLUS_POR_CNID		1	
/* Parent Of the Root */

#define HFSPLUS_ROOT_CNID		2	
/* ROOT directory */

#define HFSPLUS_EXT_CNID		3	
/* EXTents B-tree */

#define HFSPLUS_CAT_CNID		4	
/* CATalog B-tree */

#define HFSPLUS_BAD_CNID		5	
/* BAD blocks file */

#define HFSPLUS_ALLOC_CNID		6	
/* ALLOCation file */

#define HFSPLUS_START_CNID		7	
/* STARTup file */

#define HFSPLUS_ATTR_CNID		8	
/* ATTRibutes file */

#define HFSPLUS_EXCH_CNID		15	
/* ExchangeFiles temp id */

#define HFSPLUS_FIRSTUSER_CNID		16	
/* first available user id */

/* btree key type */

#define HFSPLUS_KEY_CASEFOLDING		0xCF	
/* case-insensitive */

#define HFSPLUS_KEY_BINARY		0xBC	
/* case-sensitive */

/* 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))

/* Structs from hfs.h */

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


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


/* HFS directory info (stolen from hfs.h */

struct DInfo {
	
struct hfsp_rect frRect;
	
__be16 frFlags;
	
struct hfsp_point frLocation;
	
__be16 frView;
} 
__packed;


struct DXInfo {
	
struct hfsp_point frScroll;
	
__be32 frOpenChain;
	
__be16 frUnused;
	
__be16 frComment;
	
__be32 frPutAway;
} 
__packed;

/* 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 DInfo user_info;
	
struct DXInfo finder_info;
	
__be32 text_encoding;
	
__be32 subfolders;	/* Subfolder count in HFSX. Reserved in HFS+. */
} 
__packed;

/* HFS file info (stolen from hfs.h) */

struct FInfo {
	
__be32 fdType;
	
__be32 fdCreator;
	
__be16 fdFlags;
	
struct hfsp_point fdLocation;
	
__be16 fdFldr;
} 
__packed;


struct FXInfo {
	
__be16 fdIconID;
	
u8 fdUnused[8];
	
__be16 fdComment;
	
__be32 fdPutAway;
} 
__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 FInfo user_info;
	
struct 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

/* 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)


#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

Overall Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton74468.95%17.69%
vyacheslav dubeykovyacheslav dubeyko18517.15%215.38%
al viroal viro867.97%17.69%
david elliottdavid elliott211.95%17.69%
roman zippelroman zippel181.67%215.38%
sergei antonovsergei antonov131.20%215.38%
eric sandeeneric sandeen50.46%17.69%
michael opdenackermichael opdenacker40.37%17.69%
matthew garrettmatthew garrett20.19%17.69%
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Total1079100.00%13100.00%
Directory: fs/hfsplus
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