1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (C) 2019 Namjae Jeon <linkinjeon@kernel.org>
16 #ifdef WORDS_BIGENDIAN
17 #define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
18 #define cpu_to_le32(x) \
19 ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \
20 (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))
21 #define cpu_to_le64(x) (cpu_to_le32((uint64_t)(x)) << 32 | \
22 cpu_to_le32((uint64_t)(x) >> 32))
24 #define cpu_to_le16(x) (x)
25 #define cpu_to_le32(x) (x)
26 #define cpu_to_le64(x) (x)
29 #define le64_to_cpu(x) ((uint64_t)cpu_to_le64(x))
30 #define le32_to_cpu(x) ((uint32_t)cpu_to_le32(x))
31 #define le16_to_cpu(x) ((uint16_t)cpu_to_le16(x))
33 #define PBR_SIGNATURE 0xAA55
35 #define VOL_CLEAN 0x0000
36 #define VOL_DIRTY 0x0002
38 #define DENTRY_SIZE 32 /* directory entry size */
39 #define DENTRY_SIZE_BITS 5
40 /* exFAT allows 8388608(256MB) directory entries */
41 #define MAX_EXFAT_DENTRIES 8388608
42 #define MIN_FILE_DENTRIES 3
43 #define MAX_NAME_DENTRIES 17
44 #define MAX_EXT_DENTRIES 0xFF
47 #define MSDOS_DELETED 0xE5 /* deleted mark */
48 #define MSDOS_UNUSED 0x00 /* end of directory */
50 #define EXFAT_LAST 0x00 /* end of directory */
51 #define EXFAT_DELETE ~(0x80)
52 #define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */
53 #define EXFAT_INVAL 0x80 /* invalid value */
54 #define EXFAT_BITMAP 0x81 /* allocation bitmap */
55 #define EXFAT_UPCASE 0x82 /* upcase table */
56 #define EXFAT_VOLUME 0x83 /* volume label */
57 #define EXFAT_FILE 0x85 /* file or dir */
58 #define EXFAT_GUID 0xA0
59 #define EXFAT_PADDING 0xA1
60 #define EXFAT_ACLTAB 0xA2
61 #define EXFAT_STREAM 0xC0 /* stream entry */
62 #define EXFAT_NAME 0xC1 /* file name entry */
63 #define EXFAT_ACL 0xC2 /* stream entry */
64 #define EXFAT_VENDOR_EXT 0xE0
65 #define EXFAT_VENDOR_ALLOC 0xE1
68 #define CS_DIR_ENTRY 0
69 #define CS_PBR_SECTOR 1
73 #define ATTR_READONLY 0x0001
74 #define ATTR_HIDDEN 0x0002
75 #define ATTR_SYSTEM 0x0004
76 #define ATTR_VOLUME 0x0008
77 #define ATTR_SUBDIR 0x0010
78 #define ATTR_ARCHIVE 0x0020
79 #define ATTR_EXTEND (ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM | \
80 ATTR_VOLUME) /* 0x000F */
82 #define ATTR_EXTEND_MASK (ATTR_EXTEND | ATTR_SUBDIR | ATTR_ARCHIVE)
83 #define ATTR_RWMASK (ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \
84 ATTR_SUBDIR | ATTR_ARCHIVE)
86 #define ATTR_READONLY_LE cpu_to_le16(0x0001)
87 #define ATTR_HIDDEN_LE cpu_to_le16(0x0002)
88 #define ATTR_SYSTEM_LE cpu_to_le16(0x0004)
89 #define ATTR_VOLUME_LE cpu_to_le16(0x0008)
90 #define ATTR_SUBDIR_LE cpu_to_le16(0x0010)
91 #define ATTR_ARCHIVE_LE cpu_to_le16(0x0020)
94 #define EXFAT_SF_CONTIGUOUS 0x02
96 #define CLUSTER_32(x) ((unsigned int)((x) & 0xFFFFFFFFU))
97 #define EXFAT_EOF_CLUSTER CLUSTER_32(~0)
98 #define EXFAT_BAD_CLUSTER (0xFFFFFFF7U)
99 #define EXFAT_FREE_CLUSTER (0)
100 #define EXFAT_FIRST_CLUSTER (2)
101 #define EXFAT_RESERVED_CLUSTERS (2)
104 /* EXFAT BIOS parameter block (64 bytes) */
111 /* EXFAT EXTEND BIOS parameter block (56 bytes) */
124 __u8 sect_per_clus_bits;
131 /* Common PBR[Partition Boot Record] (512 bytes) */
139 #define VOLUME_LABEL_MAX_LEN 11
140 #define EXFAT_GUID_LEN 16
141 #define ENTRY_NAME_MAX 15
143 struct exfat_dentry {
147 __u8 character_count;
148 __le16 volume_label[VOLUME_LABEL_MAX_LEN];
150 } __attribute__((packed)) vol; /* file directory entry */
169 } __attribute__((packed)) file; /* file directory entry */
180 } __attribute__((packed)) stream; /* stream extension directory entry */
183 __le16 unicode_0_14[15];
184 } __attribute__((packed)) name; /* file name directory entry */
190 } __attribute__((packed)) bitmap; /* allocation bitmap directory entry */
197 } __attribute__((packed)) upcase; /* up-case table directory entry */
202 __u8 guid[EXFAT_GUID_LEN];
204 } __attribute__((packed)) guid; /* volume GUID directory entry */
207 __u8 guid[EXFAT_GUID_LEN];
208 __u8 vendor_defined[14];
209 } __attribute__((packed)) vendor_ext ; /* vendor extension entry */
212 __u8 guid[EXFAT_GUID_LEN];
213 __u8 vendor_defined[2];
216 } __attribute__((packed)) vendor_alloc; /* vendor allocation entry */
218 } __attribute__((packed)) dentry;
219 } __attribute__((packed));
221 #define vol_char_cnt dentry.vol.character_count
222 #define vol_label dentry.vol.volume_label
223 #define file_num_ext dentry.file.num_ext
224 #define file_checksum dentry.file.checksum
225 #define file_attr dentry.file.attr
226 #define file_create_time dentry.file.create_time
227 #define file_create_date dentry.file.create_date
228 #define file_modify_time dentry.file.modify_time
229 #define file_modify_date dentry.file.modify_date
230 #define file_access_time dentry.file.access_time
231 #define file_access_date dentry.file.access_date
232 #define file_create_time_ms dentry.file.create_time_ms
233 #define file_modify_time_ms dentry.file.modify_time_ms
234 #define file_access_time_ms dentry.file.access_time_ms
235 #define stream_flags dentry.stream.flags
236 #define stream_name_len dentry.stream.name_len
237 #define stream_name_hash dentry.stream.name_hash
238 #define stream_start_clu dentry.stream.start_clu
239 #define stream_valid_size dentry.stream.valid_size
240 #define stream_size dentry.stream.size
241 #define name_flags dentry.name.flags
242 #define name_unicode dentry.name.unicode_0_14
243 #define bitmap_flags dentry.bitmap.flags
244 #define bitmap_start_clu dentry.bitmap.start_clu
245 #define bitmap_size dentry.bitmap.size
246 #define upcase_start_clu dentry.upcase.start_clu
247 #define upcase_size dentry.upcase.size
248 #define upcase_checksum dentry.upcase.checksum
250 #endif /* !_EXFAT_H */