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 BOOT_SIGNATURE 0xAA55 |
12 | #define EXBOOT_SIGNATURE 0xAA550000 |
13 | #define STR_EXFAT "EXFAT " /* size should be 8 */ |
14 | |
15 | #define EXFAT_MAX_FILE_LEN 255 |
16 | |
17 | #define VOLUME_DIRTY 0x0002 |
18 | #define MEDIA_FAILURE 0x0004 |
19 | |
20 | #define EXFAT_EOF_CLUSTER 0xFFFFFFFFu |
21 | #define EXFAT_BAD_CLUSTER 0xFFFFFFF7u |
22 | #define EXFAT_FREE_CLUSTER 0 |
23 | /* Cluster 0, 1 are reserved, the first cluster is 2 in the cluster heap. */ |
24 | #define EXFAT_RESERVED_CLUSTERS 2 |
25 | #define EXFAT_FIRST_CLUSTER 2 |
26 | #define EXFAT_DATA_CLUSTER_COUNT(sbi) \ |
27 | ((sbi)->num_clusters - EXFAT_RESERVED_CLUSTERS) |
28 | |
29 | /* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */ |
30 | #define ALLOC_POSSIBLE 0x01 |
31 | #define ALLOC_FAT_CHAIN 0x01 |
32 | #define ALLOC_NO_FAT_CHAIN 0x03 |
33 | |
34 | #define DENTRY_SIZE 32 /* directory entry size */ |
35 | #define DENTRY_SIZE_BITS 5 |
36 | /* exFAT allows 8388608(256MB) directory entries */ |
37 | #define MAX_EXFAT_DENTRIES 8388608 |
38 | |
39 | /* dentry types */ |
40 | #define EXFAT_UNUSED 0x00 /* end of directory */ |
41 | #define EXFAT_DELETE (~0x80) |
42 | #define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */ |
43 | #define EXFAT_INVAL 0x80 /* invalid value */ |
44 | #define EXFAT_BITMAP 0x81 /* allocation bitmap */ |
45 | #define EXFAT_UPCASE 0x82 /* upcase table */ |
46 | #define EXFAT_VOLUME 0x83 /* volume label */ |
47 | #define EXFAT_FILE 0x85 /* file or dir */ |
48 | #define EXFAT_GUID 0xA0 |
49 | #define EXFAT_PADDING 0xA1 |
50 | #define EXFAT_ACLTAB 0xA2 |
51 | #define EXFAT_STREAM 0xC0 /* stream entry */ |
52 | #define EXFAT_NAME 0xC1 /* file name entry */ |
53 | #define EXFAT_ACL 0xC2 /* stream entry */ |
54 | #define EXFAT_VENDOR_EXT 0xE0 /* vendor extension entry */ |
55 | #define EXFAT_VENDOR_ALLOC 0xE1 /* vendor allocation entry */ |
56 | |
57 | #define IS_EXFAT_CRITICAL_PRI(x) (x < 0xA0) |
58 | #define IS_EXFAT_BENIGN_PRI(x) (x < 0xC0) |
59 | #define IS_EXFAT_CRITICAL_SEC(x) (x < 0xE0) |
60 | |
61 | /* checksum types */ |
62 | #define CS_DIR_ENTRY 0 |
63 | #define CS_BOOT_SECTOR 1 |
64 | #define CS_DEFAULT 2 |
65 | |
66 | /* file attributes */ |
67 | #define EXFAT_ATTR_READONLY 0x0001 |
68 | #define EXFAT_ATTR_HIDDEN 0x0002 |
69 | #define EXFAT_ATTR_SYSTEM 0x0004 |
70 | #define EXFAT_ATTR_VOLUME 0x0008 |
71 | #define EXFAT_ATTR_SUBDIR 0x0010 |
72 | #define EXFAT_ATTR_ARCHIVE 0x0020 |
73 | |
74 | #define EXFAT_ATTR_RWMASK (EXFAT_ATTR_HIDDEN | EXFAT_ATTR_SYSTEM | \ |
75 | EXFAT_ATTR_VOLUME | EXFAT_ATTR_SUBDIR | \ |
76 | EXFAT_ATTR_ARCHIVE) |
77 | |
78 | #define BOOTSEC_JUMP_BOOT_LEN 3 |
79 | #define BOOTSEC_FS_NAME_LEN 8 |
80 | #define BOOTSEC_OLDBPB_LEN 53 |
81 | |
82 | #define EXFAT_FILE_NAME_LEN 15 |
83 | |
84 | #define EXFAT_MIN_SECT_SIZE_BITS 9 |
85 | #define EXFAT_MAX_SECT_SIZE_BITS 12 |
86 | #define EXFAT_MAX_SECT_PER_CLUS_BITS(x) (25 - (x)->sect_size_bits) |
87 | |
88 | /* EXFAT: Main and Backup Boot Sector (512 bytes) */ |
89 | struct boot_sector { |
90 | __u8 jmp_boot[BOOTSEC_JUMP_BOOT_LEN]; |
91 | __u8 fs_name[BOOTSEC_FS_NAME_LEN]; |
92 | __u8 must_be_zero[BOOTSEC_OLDBPB_LEN]; |
93 | __le64 partition_offset; |
94 | __le64 vol_length; |
95 | __le32 fat_offset; |
96 | __le32 fat_length; |
97 | __le32 clu_offset; |
98 | __le32 clu_count; |
99 | __le32 root_cluster; |
100 | __le32 vol_serial; |
101 | __u8 fs_revision[2]; |
102 | __le16 vol_flags; |
103 | __u8 sect_size_bits; |
104 | __u8 sect_per_clus_bits; |
105 | __u8 num_fats; |
106 | __u8 drv_sel; |
107 | __u8 percent_in_use; |
108 | __u8 reserved[7]; |
109 | __u8 boot_code[390]; |
110 | __le16 signature; |
111 | } __packed; |
112 | |
113 | struct exfat_dentry { |
114 | __u8 type; |
115 | union { |
116 | struct { |
117 | __u8 num_ext; |
118 | __le16 checksum; |
119 | __le16 attr; |
120 | __le16 reserved1; |
121 | __le16 create_time; |
122 | __le16 create_date; |
123 | __le16 modify_time; |
124 | __le16 modify_date; |
125 | __le16 access_time; |
126 | __le16 access_date; |
127 | __u8 create_time_cs; |
128 | __u8 modify_time_cs; |
129 | __u8 create_tz; |
130 | __u8 modify_tz; |
131 | __u8 access_tz; |
132 | __u8 reserved2[7]; |
133 | } __packed file; /* file directory entry */ |
134 | struct { |
135 | __u8 flags; |
136 | __u8 reserved1; |
137 | __u8 name_len; |
138 | __le16 name_hash; |
139 | __le16 reserved2; |
140 | __le64 valid_size; |
141 | __le32 reserved3; |
142 | __le32 start_clu; |
143 | __le64 size; |
144 | } __packed stream; /* stream extension directory entry */ |
145 | struct { |
146 | __u8 flags; |
147 | __le16 unicode_0_14[EXFAT_FILE_NAME_LEN]; |
148 | } __packed name; /* file name directory entry */ |
149 | struct { |
150 | __u8 flags; |
151 | __u8 reserved[18]; |
152 | __le32 start_clu; |
153 | __le64 size; |
154 | } __packed bitmap; /* allocation bitmap directory entry */ |
155 | struct { |
156 | __u8 reserved1[3]; |
157 | __le32 checksum; |
158 | __u8 reserved2[12]; |
159 | __le32 start_clu; |
160 | __le64 size; |
161 | } __packed upcase; /* up-case table directory entry */ |
162 | struct { |
163 | __u8 flags; |
164 | __u8 vendor_guid[16]; |
165 | __u8 vendor_defined[14]; |
166 | } __packed vendor_ext; /* vendor extension directory entry */ |
167 | struct { |
168 | __u8 flags; |
169 | __u8 vendor_guid[16]; |
170 | __u8 vendor_defined[2]; |
171 | __le32 start_clu; |
172 | __le64 size; |
173 | } __packed vendor_alloc; /* vendor allocation directory entry */ |
174 | struct { |
175 | __u8 flags; |
176 | __u8 custom_defined[18]; |
177 | __le32 start_clu; |
178 | __le64 size; |
179 | } __packed generic_secondary; /* generic secondary directory entry */ |
180 | } __packed dentry; |
181 | } __packed; |
182 | |
183 | #define EXFAT_TZ_VALID (1 << 7) |
184 | |
185 | /* Jan 1 GMT 00:00:00 1980 */ |
186 | #define EXFAT_MIN_TIMESTAMP_SECS 315532800LL |
187 | /* Dec 31 GMT 23:59:59 2107 */ |
188 | #define EXFAT_MAX_TIMESTAMP_SECS 4354819199LL |
189 | |
190 | #endif /* !_EXFAT_RAW_H */ |
191 | |