| Namjae Jeon | 1acf1a5 | 2020-03-02 15:21:32 +0900 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | /* |
| 3 | * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. |
| 4 | */ |
| 5 | |
| 6 | #ifndef _EXFAT_RAW_H |
| 7 | #define _EXFAT_RAW_H |
| 8 | |
| 9 | #include <linux/types.h> |
| 10 | |
| 11 | #define PBR_SIGNATURE 0xAA55 |
| 12 | |
| 13 | #define EXFAT_MAX_FILE_LEN 255 |
| 14 | |
| 15 | #define VOL_CLEAN 0x0000 |
| 16 | #define VOL_DIRTY 0x0002 |
| 17 | |
| 18 | #define EXFAT_EOF_CLUSTER 0xFFFFFFFFu |
| 19 | #define EXFAT_BAD_CLUSTER 0xFFFFFFF7u |
| 20 | #define EXFAT_FREE_CLUSTER 0 |
| 21 | /* Cluster 0, 1 are reserved, the first cluster is 2 in the cluster heap. */ |
| 22 | #define EXFAT_RESERVED_CLUSTERS 2 |
| 23 | #define EXFAT_FIRST_CLUSTER 2 |
| 24 | #define EXFAT_DATA_CLUSTER_COUNT(sbi) \ |
| 25 | ((sbi)->num_clusters - EXFAT_RESERVED_CLUSTERS) |
| 26 | |
| 27 | /* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */ |
| 28 | #define ALLOC_FAT_CHAIN 0x01 |
| 29 | #define ALLOC_NO_FAT_CHAIN 0x03 |
| 30 | |
| 31 | #define DENTRY_SIZE 32 /* directory entry size */ |
| 32 | #define DENTRY_SIZE_BITS 5 |
| 33 | /* exFAT allows 8388608(256MB) directory entries */ |
| 34 | #define MAX_EXFAT_DENTRIES 8388608 |
| 35 | |
| 36 | /* dentry types */ |
| 37 | #define EXFAT_UNUSED 0x00 /* end of directory */ |
| 38 | #define EXFAT_DELETE (~0x80) |
| 39 | #define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */ |
| 40 | #define EXFAT_INVAL 0x80 /* invalid value */ |
| 41 | #define EXFAT_BITMAP 0x81 /* allocation bitmap */ |
| 42 | #define EXFAT_UPCASE 0x82 /* upcase table */ |
| 43 | #define EXFAT_VOLUME 0x83 /* volume label */ |
| 44 | #define EXFAT_FILE 0x85 /* file or dir */ |
| 45 | #define EXFAT_GUID 0xA0 |
| 46 | #define EXFAT_PADDING 0xA1 |
| 47 | #define EXFAT_ACLTAB 0xA2 |
| 48 | #define EXFAT_STREAM 0xC0 /* stream entry */ |
| 49 | #define EXFAT_NAME 0xC1 /* file name entry */ |
| 50 | #define EXFAT_ACL 0xC2 /* stream entry */ |
| 51 | |
| 52 | #define IS_EXFAT_CRITICAL_PRI(x) (x < 0xA0) |
| 53 | #define IS_EXFAT_BENIGN_PRI(x) (x < 0xC0) |
| 54 | #define IS_EXFAT_CRITICAL_SEC(x) (x < 0xE0) |
| 55 | |
| 56 | /* checksum types */ |
| 57 | #define CS_DIR_ENTRY 0 |
| 58 | #define CS_PBR_SECTOR 1 |
| 59 | #define CS_DEFAULT 2 |
| 60 | |
| 61 | /* file attributes */ |
| 62 | #define ATTR_READONLY 0x0001 |
| 63 | #define ATTR_HIDDEN 0x0002 |
| 64 | #define ATTR_SYSTEM 0x0004 |
| 65 | #define ATTR_VOLUME 0x0008 |
| 66 | #define ATTR_SUBDIR 0x0010 |
| 67 | #define ATTR_ARCHIVE 0x0020 |
| 68 | |
| 69 | #define ATTR_RWMASK (ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \ |
| 70 | ATTR_SUBDIR | ATTR_ARCHIVE) |
| 71 | |
| 72 | #define PBR64_JUMP_BOOT_LEN 3 |
| 73 | #define PBR64_OEM_NAME_LEN 8 |
| 74 | #define PBR64_RESERVED_LEN 53 |
| 75 | |
| 76 | #define EXFAT_FILE_NAME_LEN 15 |
| 77 | |
| 78 | /* EXFAT BIOS parameter block (64 bytes) */ |
| 79 | struct bpb64 { |
| 80 | __u8 jmp_boot[PBR64_JUMP_BOOT_LEN]; |
| 81 | __u8 oem_name[PBR64_OEM_NAME_LEN]; |
| 82 | __u8 res_zero[PBR64_RESERVED_LEN]; |
| 83 | } __packed; |
| 84 | |
| 85 | /* EXFAT EXTEND BIOS parameter block (56 bytes) */ |
| 86 | struct bsx64 { |
| 87 | __le64 vol_offset; |
| 88 | __le64 vol_length; |
| 89 | __le32 fat_offset; |
| 90 | __le32 fat_length; |
| 91 | __le32 clu_offset; |
| 92 | __le32 clu_count; |
| 93 | __le32 root_cluster; |
| 94 | __le32 vol_serial; |
| 95 | __u8 fs_version[2]; |
| 96 | __le16 vol_flags; |
| 97 | __u8 sect_size_bits; |
| 98 | __u8 sect_per_clus_bits; |
| 99 | __u8 num_fats; |
| 100 | __u8 phy_drv_no; |
| 101 | __u8 perc_in_use; |
| 102 | __u8 reserved2[7]; |
| 103 | } __packed; |
| 104 | |
| 105 | /* EXFAT PBR[BPB+BSX] (120 bytes) */ |
| 106 | struct pbr64 { |
| 107 | struct bpb64 bpb; |
| 108 | struct bsx64 bsx; |
| 109 | } __packed; |
| 110 | |
| 111 | /* Common PBR[Partition Boot Record] (512 bytes) */ |
| 112 | struct pbr { |
| 113 | union { |
| 114 | __u8 raw[64]; |
| 115 | struct bpb64 f64; |
| 116 | } bpb; |
| 117 | union { |
| 118 | __u8 raw[56]; |
| 119 | struct bsx64 f64; |
| 120 | } bsx; |
| 121 | __u8 boot_code[390]; |
| 122 | __le16 signature; |
| 123 | } __packed; |
| 124 | |
| 125 | struct exfat_dentry { |
| 126 | __u8 type; |
| 127 | union { |
| 128 | struct { |
| 129 | __u8 num_ext; |
| 130 | __le16 checksum; |
| 131 | __le16 attr; |
| 132 | __le16 reserved1; |
| 133 | __le16 create_time; |
| 134 | __le16 create_date; |
| 135 | __le16 modify_time; |
| 136 | __le16 modify_date; |
| 137 | __le16 access_time; |
| 138 | __le16 access_date; |
| 139 | __u8 create_time_ms; |
| 140 | __u8 modify_time_ms; |
| 141 | __u8 create_tz; |
| 142 | __u8 modify_tz; |
| 143 | __u8 access_tz; |
| 144 | __u8 reserved2[7]; |
| 145 | } __packed file; /* file directory entry */ |
| 146 | struct { |
| 147 | __u8 flags; |
| 148 | __u8 reserved1; |
| 149 | __u8 name_len; |
| 150 | __le16 name_hash; |
| 151 | __le16 reserved2; |
| 152 | __le64 valid_size; |
| 153 | __le32 reserved3; |
| 154 | __le32 start_clu; |
| 155 | __le64 size; |
| 156 | } __packed stream; /* stream extension directory entry */ |
| 157 | struct { |
| 158 | __u8 flags; |
| 159 | __le16 unicode_0_14[EXFAT_FILE_NAME_LEN]; |
| 160 | } __packed name; /* file name directory entry */ |
| 161 | struct { |
| 162 | __u8 flags; |
| 163 | __u8 reserved[18]; |
| 164 | __le32 start_clu; |
| 165 | __le64 size; |
| 166 | } __packed bitmap; /* allocation bitmap directory entry */ |
| 167 | struct { |
| 168 | __u8 reserved1[3]; |
| 169 | __le32 checksum; |
| 170 | __u8 reserved2[12]; |
| 171 | __le32 start_clu; |
| 172 | __le64 size; |
| 173 | } __packed upcase; /* up-case table directory entry */ |
| 174 | } __packed dentry; |
| 175 | } __packed; |
| 176 | |
| 177 | #define EXFAT_TZ_VALID (1 << 7) |
| 178 | |
| 179 | /* Jan 1 GMT 00:00:00 1980 */ |
| 180 | #define EXFAT_MIN_TIMESTAMP_SECS 315532800LL |
| 181 | /* Dec 31 GMT 23:59:59 2107 */ |
| 182 | #define EXFAT_MAX_TIMESTAMP_SECS 4354819199LL |
| 183 | |
| 184 | #endif /* !_EXFAT_RAW_H */ |