/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
*/
#ifndef _EXFAT_RAW_H
#define _EXFAT_RAW_H
#include <linux/types.h>
#define BOOT_SIGNATURE 0 xAA55
#define EXBOOT_SIGNATURE 0 xAA550000
#define STR_EXFAT "EXFAT " /* size should be 8 */
#define EXFAT_MAX_FILE_LEN 255
#define VOLUME_DIRTY 0 x0002
#define MEDIA_FAILURE 0 x0004
#define EXFAT_EOF_CLUSTER 0 xFFFFFFFFu
#define EXFAT_BAD_CLUSTER 0 xFFFFFFF7u
#define EXFAT_FREE_CLUSTER 0
/* Cluster 0, 1 are reserved, the first cluster is 2 in the cluster heap. */
#define EXFAT_RESERVED_CLUSTERS 2
#define EXFAT_FIRST_CLUSTER 2
#define EXFAT_DATA_CLUSTER_COUNT(sbi) \
((sbi)->num_clusters - EXFAT_RESERVED_CLUSTERS)
/* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */
#define ALLOC_POSSIBLE 0 x01
#define ALLOC_FAT_CHAIN 0 x01
#define ALLOC_NO_FAT_CHAIN 0 x03
#define DENTRY_SIZE 32 /* directory entry size */
#define DENTRY_SIZE_BITS 5
/* exFAT allows 8388608(256MB) directory entries */
#define MAX_EXFAT_DENTRIES 8388608
/* dentry types */
#define EXFAT_UNUSED 0 x00 /* end of directory */
#define EXFAT_DELETE (~0 x80)
#define IS_EXFAT_DELETED(x) ((x) < 0 x80) /* deleted file (0x01~0x7F) */
#define EXFAT_INVAL 0 x80 /* invalid value */
#define EXFAT_BITMAP 0 x81 /* allocation bitmap */
#define EXFAT_UPCASE 0 x82 /* upcase table */
#define EXFAT_VOLUME 0 x83 /* volume label */
#define EXFAT_FILE 0 x85 /* file or dir */
#define EXFAT_GUID 0 xA0
#define EXFAT_PADDING 0 xA1
#define EXFAT_ACLTAB 0 xA2
#define EXFAT_STREAM 0 xC0 /* stream entry */
#define EXFAT_NAME 0 xC1 /* file name entry */
#define EXFAT_ACL 0 xC2 /* stream entry */
#define EXFAT_VENDOR_EXT 0 xE0 /* vendor extension entry */
#define EXFAT_VENDOR_ALLOC 0 xE1 /* vendor allocation entry */
#define IS_EXFAT_CRITICAL_PRI(x) (x < 0 xA0)
#define IS_EXFAT_BENIGN_PRI(x) (x < 0 xC0)
#define IS_EXFAT_CRITICAL_SEC(x) (x < 0 xE0)
/* checksum types */
#define CS_DIR_ENTRY 0
#define CS_BOOT_SECTOR 1
#define CS_DEFAULT 2
/* file attributes */
#define EXFAT_ATTR_READONLY 0 x0001
#define EXFAT_ATTR_HIDDEN 0 x0002
#define EXFAT_ATTR_SYSTEM 0 x0004
#define EXFAT_ATTR_VOLUME 0 x0008
#define EXFAT_ATTR_SUBDIR 0 x0010
#define EXFAT_ATTR_ARCHIVE 0 x0020
#define EXFAT_ATTR_RWMASK (EXFAT_ATTR_HIDDEN | EXFAT_ATTR_SYSTEM | \
EXFAT_ATTR_VOLUME | EXFAT_ATTR_SUBDIR | \
EXFAT_ATTR_ARCHIVE)
#define BOOTSEC_JUMP_BOOT_LEN 3
#define BOOTSEC_FS_NAME_LEN 8
#define BOOTSEC_OLDBPB_LEN 53
#define EXFAT_FILE_NAME_LEN 15
#define EXFAT_MIN_SECT_SIZE_BITS 9
#define EXFAT_MAX_SECT_SIZE_BITS 12
#define EXFAT_MAX_SECT_PER_CLUS_BITS(x) (25 - (x)->sect_size_bits)
/* EXFAT: Main and Backup Boot Sector (512 bytes) */
struct boot_sector {
__u8 jmp_boot[BOOTSEC_JUMP_BOOT_LEN];
__u8 fs_name[BOOTSEC_FS_NAME_LEN];
__u8 must_be_zero[BOOTSEC_OLDBPB_LEN];
__le64 partition_offset;
__le64 vol_length;
__le32 fat_offset;
__le32 fat_length;
__le32 clu_offset;
__le32 clu_count;
__le32 root_cluster;
__le32 vol_serial;
__u8 fs_revision[2 ];
__le16 vol_flags;
__u8 sect_size_bits;
__u8 sect_per_clus_bits;
__u8 num_fats;
__u8 drv_sel;
__u8 percent_in_use;
__u8 reserved[7 ];
__u8 boot_code[390 ];
__le16 signature;
} __packed;
struct exfat_dentry {
__u8 type;
union {
struct {
__u8 num_ext;
__le16 checksum;
__le16 attr;
__le16 reserved1;
__le16 create_time;
__le16 create_date;
__le16 modify_time;
__le16 modify_date;
__le16 access_time;
__le16 access_date;
__u8 create_time_cs;
__u8 modify_time_cs;
__u8 create_tz;
__u8 modify_tz;
__u8 access_tz;
__u8 reserved2[7 ];
} __packed file; /* file directory entry */
struct {
__u8 flags;
__u8 reserved1;
__u8 name_len;
__le16 name_hash;
__le16 reserved2;
__le64 valid_size;
__le32 reserved3;
__le32 start_clu;
__le64 size;
} __packed stream; /* stream extension directory entry */
struct {
__u8 flags;
__le16 unicode_0_14[EXFAT_FILE_NAME_LEN];
} __packed name; /* file name directory entry */
struct {
__u8 flags;
__u8 reserved[18 ];
__le32 start_clu;
__le64 size;
} __packed bitmap; /* allocation bitmap directory entry */
struct {
__u8 reserved1[3 ];
__le32 checksum;
__u8 reserved2[12 ];
__le32 start_clu;
__le64 size;
} __packed upcase; /* up-case table directory entry */
struct {
__u8 flags;
__u8 vendor_guid[16 ];
__u8 vendor_defined[14 ];
} __packed vendor_ext; /* vendor extension directory entry */
struct {
__u8 flags;
__u8 vendor_guid[16 ];
__u8 vendor_defined[2 ];
__le32 start_clu;
__le64 size;
} __packed vendor_alloc; /* vendor allocation directory entry */
struct {
__u8 flags;
__u8 custom_defined[18 ];
__le32 start_clu;
__le64 size;
} __packed generic_secondary; /* generic secondary directory entry */
} __packed dentry;
} __packed;
#define EXFAT_TZ_VALID (1 << 7 )
/* Jan 1 GMT 00:00:00 1980 */
#define EXFAT_MIN_TIMESTAMP_SECS 315532800 LL
/* Dec 31 GMT 23:59:59 2107 */
#define EXFAT_MAX_TIMESTAMP_SECS 4354819199 LL
#endif /* !_EXFAT_RAW_H */
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