3 Definitions of structures and constants used in exFAT file system
6 Copyright (C) 2009, 2010 Andrew Nayenko
8 This program is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef EXFAT_H_INCLUDED
23 #define EXFAT_H_INCLUDED
29 #include <sys/types.h>
33 #define EXFAT_NAME_MAX 256
34 #define EXFAT_ATTRIB_CONTIGUOUS 0x10000
35 #define EXFAT_ATTRIB_CACHED 0x20000
36 #define EXFAT_ATTRIB_DIRTY 0x40000
37 #define EXFAT_ATTRIB_UNLINKED 0x80000
38 #define IS_CONTIGUOUS(node) (((node).flags & EXFAT_ATTRIB_CONTIGUOUS) != 0)
39 #define BLOCK_SIZE(sb) (1 << (sb).block_bits)
40 #define CLUSTER_SIZE(sb) (BLOCK_SIZE(sb) << (sb).bpc_bits)
41 #define CLUSTER_INVALID(c) ((c) == EXFAT_CLUSTER_BAD || (c) == EXFAT_CLUSTER_END)
43 #define MIN(a, b) ((a) < (b) ? (a) : (b))
44 #define DIV_ROUND_UP(x, d) (((x) + (d) - 1) / (d))
46 #define BMAP_GET(bitmap, index) \
47 (((uint8_t*) bitmap)[(index) / 8] & (1u << ((index) % 8)))
48 #define BMAP_SET(bitmap, index) \
49 ((uint8_t*) bitmap)[(index) / 8] |= (1u << ((index) % 8))
50 #define BMAP_CLR(bitmap, index) \
51 ((uint8_t*) bitmap)[(index) / 8] &= ~(1u << ((index) % 8))
55 struct exfat_node* parent;
56 struct exfat_node* child;
57 struct exfat_node* next;
58 struct exfat_node* prev;
62 cluster_t fptr_cluster;
63 cluster_t entry_cluster;
65 cluster_t start_cluster;
69 le16_t name[EXFAT_NAME_MAX + 1];
74 struct exfat_super_block* sb;
78 struct exfat_node* root;
81 cluster_t start_cluster;
82 uint32_t size; /* in bits */
84 uint32_t chunk_size; /* in bits */
96 /* in-core nodes iterator */
99 struct exfat_node* parent;
100 struct exfat_node* current;
103 struct exfat_human_bytes
109 extern int exfat_errors;
111 void exfat_bug(const char* format, ...)
112 __attribute__((format(printf, 1, 2), noreturn));
113 void exfat_error(const char* format, ...)
114 __attribute__((format(printf, 1, 2)));
115 void exfat_warn(const char* format, ...)
116 __attribute__((format(printf, 1, 2)));
117 void exfat_debug(const char* format, ...)
118 __attribute__((format(printf, 1, 2)));
120 void exfat_read_raw(void* buffer, size_t size, off_t offset, int fd);
121 void exfat_write_raw(const void* buffer, size_t size, off_t offset, int fd);
122 ssize_t exfat_read(const struct exfat* ef, struct exfat_node* node,
123 void* buffer, size_t size, off_t offset);
124 ssize_t exfat_write(struct exfat* ef, struct exfat_node* node,
125 const void* buffer, size_t size, off_t offset);
127 int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
128 struct exfat_iterator* it);
129 void exfat_closedir(struct exfat* ef, struct exfat_iterator* it);
130 struct exfat_node* exfat_readdir(struct exfat* ef, struct exfat_iterator* it);
131 int exfat_lookup(struct exfat* ef, struct exfat_node** node,
133 int exfat_split(struct exfat* ef, struct exfat_node** parent,
134 struct exfat_node** node, le16_t* name, const char* path);
136 off_t exfat_c2o(const struct exfat* ef, cluster_t cluster);
137 cluster_t exfat_next_cluster(const struct exfat* ef,
138 const struct exfat_node* node, cluster_t cluster);
139 cluster_t exfat_advance_cluster(const struct exfat* ef,
140 struct exfat_node* node, uint32_t count);
141 void exfat_flush_cmap(struct exfat* ef);
142 int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size);
143 uint32_t exfat_count_free_clusters(struct exfat* ef);
145 void exfat_stat(const struct exfat* ef, const struct exfat_node* node,
147 time_t exfat_exfat2unix(le16_t date, le16_t time, uint8_t centisec);
148 void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time,
150 void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n);
151 uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry);
152 uint16_t exfat_add_checksum(const void* entry, uint16_t sum);
153 le16_t exfat_calc_checksum(const struct exfat_entry_meta1* meta1,
154 const struct exfat_entry_meta2* meta2, const le16_t* name);
155 le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name);
156 void exfat_humanize_bytes(uint64_t value, struct exfat_human_bytes* hb);
158 int utf16_to_utf8(char* output, const le16_t* input, size_t outsize,
160 int utf8_to_utf16(le16_t* output, const char* input, size_t outsize,
162 size_t utf16_length(const le16_t* str);
164 struct exfat_node* exfat_get_node(struct exfat_node* node);
165 void exfat_put_node(struct exfat* ef, struct exfat_node* node);
166 int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir);
167 void exfat_reset_cache(struct exfat* ef);
168 void exfat_flush_node(struct exfat* ef, struct exfat_node* node);
169 int exfat_unlink(struct exfat* ef, struct exfat_node* node);
170 int exfat_rmdir(struct exfat* ef, struct exfat_node* node);
171 int exfat_mknod(struct exfat* ef, const char* path);
172 int exfat_mkdir(struct exfat* ef, const char* path);
173 int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path);
174 void exfat_utimes(struct exfat_node* node, const struct timespec tv[2]);
175 void exfat_update_atime(struct exfat_node* node);
176 void exfat_update_mtime(struct exfat_node* node);
178 int exfat_mount(struct exfat* ef, const char* spec, const char* options);
179 void exfat_unmount(struct exfat* ef);
181 #endif /* ifndef EXFAT_H_INCLUDED */