| /* 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 0xAA55 |
| #define EXBOOT_SIGNATURE 0xAA550000 |
| #define STR_EXFAT "EXFAT " /* size should be 8 */ |
| |
| #define EXFAT_MAX_FILE_LEN 255 |
| |
| #define VOL_CLEAN 0x0000 |
| #define VOL_DIRTY 0x0002 |
| #define ERR_MEDIUM 0x0004 |
| |
| #define EXFAT_EOF_CLUSTER 0xFFFFFFFFu |
| #define EXFAT_BAD_CLUSTER 0xFFFFFFF7u |
| #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_FAT_CHAIN 0x01 |
| #define ALLOC_NO_FAT_CHAIN 0x03 |
| |
| #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 0x00 /* end of directory */ |
| #define EXFAT_DELETE (~0x80) |
| #define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */ |
| #define EXFAT_INVAL 0x80 /* invalid value */ |
| #define EXFAT_BITMAP 0x81 /* allocation bitmap */ |
| #define EXFAT_UPCASE 0x82 /* upcase table */ |
| #define EXFAT_VOLUME 0x83 /* volume label */ |
| #define EXFAT_FILE 0x85 /* file or dir */ |
| #define EXFAT_GUID 0xA0 |
| #define EXFAT_PADDING 0xA1 |
| #define EXFAT_ACLTAB 0xA2 |
| #define EXFAT_STREAM 0xC0 /* stream entry */ |
| #define EXFAT_NAME 0xC1 /* file name entry */ |
| #define EXFAT_ACL 0xC2 /* stream entry */ |
| |
| #define IS_EXFAT_CRITICAL_PRI(x) (x < 0xA0) |
| #define IS_EXFAT_BENIGN_PRI(x) (x < 0xC0) |
| #define IS_EXFAT_CRITICAL_SEC(x) (x < 0xE0) |
| |
| /* checksum types */ |
| #define CS_DIR_ENTRY 0 |
| #define CS_BOOT_SECTOR 1 |
| #define CS_DEFAULT 2 |
| |
| /* file attributes */ |
| #define ATTR_READONLY 0x0001 |
| #define ATTR_HIDDEN 0x0002 |
| #define ATTR_SYSTEM 0x0004 |
| #define ATTR_VOLUME 0x0008 |
| #define ATTR_SUBDIR 0x0010 |
| #define ATTR_ARCHIVE 0x0020 |
| |
| #define ATTR_RWMASK (ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \ |
| ATTR_SUBDIR | 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 |
| |
| /* 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 */ |
| } __packed dentry; |
| } __packed; |
| |
| #define EXFAT_TZ_VALID (1 << 7) |
| |
| /* Jan 1 GMT 00:00:00 1980 */ |
| #define EXFAT_MIN_TIMESTAMP_SECS 315532800LL |
| /* Dec 31 GMT 23:59:59 2107 */ |
| #define EXFAT_MAX_TIMESTAMP_SECS 4354819199LL |
| |
| #endif /* !_EXFAT_RAW_H */ |