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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_FAT_CHAIN 0x01
31#define ALLOC_NO_FAT_CHAIN 0x03
32
33#define DENTRY_SIZE 32 /* directory entry size */
34#define DENTRY_SIZE_BITS 5
35/* exFAT allows 8388608(256MB) directory entries */
36#define MAX_EXFAT_DENTRIES 8388608
37
38/* dentry types */
39#define EXFAT_UNUSED 0x00 /* end of directory */
40#define EXFAT_DELETE (~0x80)
41#define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */
42#define EXFAT_INVAL 0x80 /* invalid value */
43#define EXFAT_BITMAP 0x81 /* allocation bitmap */
44#define EXFAT_UPCASE 0x82 /* upcase table */
45#define EXFAT_VOLUME 0x83 /* volume label */
46#define EXFAT_FILE 0x85 /* file or dir */
47#define EXFAT_GUID 0xA0
48#define EXFAT_PADDING 0xA1
49#define EXFAT_ACLTAB 0xA2
50#define EXFAT_STREAM 0xC0 /* stream entry */
51#define EXFAT_NAME 0xC1 /* file name entry */
52#define EXFAT_ACL 0xC2 /* stream entry */
53
54#define IS_EXFAT_CRITICAL_PRI(x) (x < 0xA0)
55#define IS_EXFAT_BENIGN_PRI(x) (x < 0xC0)
56#define IS_EXFAT_CRITICAL_SEC(x) (x < 0xE0)
57
58/* checksum types */
59#define CS_DIR_ENTRY 0
60#define CS_BOOT_SECTOR 1
61#define CS_DEFAULT 2
62
63/* file attributes */
64#define ATTR_READONLY 0x0001
65#define ATTR_HIDDEN 0x0002
66#define ATTR_SYSTEM 0x0004
67#define ATTR_VOLUME 0x0008
68#define ATTR_SUBDIR 0x0010
69#define ATTR_ARCHIVE 0x0020
70
71#define ATTR_RWMASK (ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \
72 ATTR_SUBDIR | ATTR_ARCHIVE)
73
74#define BOOTSEC_JUMP_BOOT_LEN 3
75#define BOOTSEC_FS_NAME_LEN 8
76#define BOOTSEC_OLDBPB_LEN 53
77
78#define EXFAT_FILE_NAME_LEN 15
79
80#define EXFAT_MIN_SECT_SIZE_BITS 9
81#define EXFAT_MAX_SECT_SIZE_BITS 12
82#define EXFAT_MAX_SECT_PER_CLUS_BITS(x) (25 - (x)->sect_size_bits)
83
84/* EXFAT: Main and Backup Boot Sector (512 bytes) */
85struct boot_sector {
86 __u8 jmp_boot[BOOTSEC_JUMP_BOOT_LEN];
87 __u8 fs_name[BOOTSEC_FS_NAME_LEN];
88 __u8 must_be_zero[BOOTSEC_OLDBPB_LEN];
89 __le64 partition_offset;
90 __le64 vol_length;
91 __le32 fat_offset;
92 __le32 fat_length;
93 __le32 clu_offset;
94 __le32 clu_count;
95 __le32 root_cluster;
96 __le32 vol_serial;
97 __u8 fs_revision[2];
98 __le16 vol_flags;
99 __u8 sect_size_bits;
100 __u8 sect_per_clus_bits;
101 __u8 num_fats;
102 __u8 drv_sel;
103 __u8 percent_in_use;
104 __u8 reserved[7];
105 __u8 boot_code[390];
106 __le16 signature;
107} __packed;
108
109struct exfat_dentry {
110 __u8 type;
111 union {
112 struct {
113 __u8 num_ext;
114 __le16 checksum;
115 __le16 attr;
116 __le16 reserved1;
117 __le16 create_time;
118 __le16 create_date;
119 __le16 modify_time;
120 __le16 modify_date;
121 __le16 access_time;
122 __le16 access_date;
123 __u8 create_time_cs;
124 __u8 modify_time_cs;
125 __u8 create_tz;
126 __u8 modify_tz;
127 __u8 access_tz;
128 __u8 reserved2[7];
129 } __packed file; /* file directory entry */
130 struct {
131 __u8 flags;
132 __u8 reserved1;
133 __u8 name_len;
134 __le16 name_hash;
135 __le16 reserved2;
136 __le64 valid_size;
137 __le32 reserved3;
138 __le32 start_clu;
139 __le64 size;
140 } __packed stream; /* stream extension directory entry */
141 struct {
142 __u8 flags;
143 __le16 unicode_0_14[EXFAT_FILE_NAME_LEN];
144 } __packed name; /* file name directory entry */
145 struct {
146 __u8 flags;
147 __u8 reserved[18];
148 __le32 start_clu;
149 __le64 size;
150 } __packed bitmap; /* allocation bitmap directory entry */
151 struct {
152 __u8 reserved1[3];
153 __le32 checksum;
154 __u8 reserved2[12];
155 __le32 start_clu;
156 __le64 size;
157 } __packed upcase; /* up-case table directory entry */
158 } __packed dentry;
159} __packed;
160
161#define EXFAT_TZ_VALID (1 << 7)
162
163/* Jan 1 GMT 00:00:00 1980 */
164#define EXFAT_MIN_TIMESTAMP_SECS 315532800LL
165/* Dec 31 GMT 23:59:59 2107 */
166#define EXFAT_MAX_TIMESTAMP_SECS 4354819199LL
167
168#endif /* !_EXFAT_RAW_H */
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) */
89struct 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
113struct 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 */