1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
9 #include <linux/types.h>
11 #define BOOT_SIGNATURE 0xAA55
12 #define EXBOOT_SIGNATURE 0xAA550000
13 #define STR_EXFAT "EXFAT " /* size should be 8 */
15 #define EXFAT_MAX_FILE_LEN 255
17 #define VOLUME_DIRTY 0x0002
18 #define MEDIA_FAILURE 0x0004
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)
29 /* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */
30 #define ALLOC_FAT_CHAIN 0x01
31 #define ALLOC_NO_FAT_CHAIN 0x03
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
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 */
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)
59 #define CS_DIR_ENTRY 0
60 #define CS_BOOT_SECTOR 1
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
71 #define ATTR_RWMASK (ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \
72 ATTR_SUBDIR | ATTR_ARCHIVE)
74 #define BOOTSEC_JUMP_BOOT_LEN 3
75 #define BOOTSEC_FS_NAME_LEN 8
76 #define BOOTSEC_OLDBPB_LEN 53
78 #define EXFAT_FILE_NAME_LEN 15
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)
84 /* EXFAT: Main and Backup Boot Sector (512 bytes) */
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;
100 __u8 sect_per_clus_bits;
109 struct exfat_dentry {
129 } __packed file; /* file directory entry */
140 } __packed stream; /* stream extension directory entry */
143 __le16 unicode_0_14[EXFAT_FILE_NAME_LEN];
144 } __packed name; /* file name directory entry */
150 } __packed bitmap; /* allocation bitmap directory entry */
157 } __packed upcase; /* up-case table directory entry */
161 #define EXFAT_TZ_VALID (1 << 7)
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
168 #endif /* !_EXFAT_RAW_H */