3 Definitions of structures and constants used in exFAT file system
6 Copyright (C) 2010-2012 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 SECTOR_SIZE(sb) (1 << (sb).sector_bits)
40 #define CLUSTER_SIZE(sb) (SECTOR_SIZE(sb) << (sb).spc_bits)
41 #define CLUSTER_INVALID(c) \
42 ((c) < EXFAT_FIRST_DATA_CLUSTER || (c) > EXFAT_LAST_DATA_CLUSTER)
44 #define MIN(a, b) ((a) < (b) ? (a) : (b))
45 #define MAX(a, b) ((a) > (b) ? (a) : (b))
46 #define DIV_ROUND_UP(x, d) (((x) + (d) - 1) / (d))
47 #define ROUND_UP(x, d) (DIV_ROUND_UP(x, d) * (d))
49 #define BMAP_GET(bitmap, index) \
50 (((uint8_t*) bitmap)[(index) / 8] & (1u << ((index) % 8)))
51 #define BMAP_SET(bitmap, index) \
52 ((uint8_t*) bitmap)[(index) / 8] |= (1u << ((index) % 8))
53 #define BMAP_CLR(bitmap, index) \
54 ((uint8_t*) bitmap)[(index) / 8] &= ~(1u << ((index) % 8))
58 struct exfat_node* parent;
59 struct exfat_node* child;
60 struct exfat_node* next;
61 struct exfat_node* prev;
65 cluster_t fptr_cluster;
66 cluster_t entry_cluster;
68 cluster_t start_cluster;
72 le16_t name[EXFAT_NAME_MAX + 1];
86 struct exfat_dev* dev;
87 struct exfat_super_block* sb;
90 struct exfat_node* root;
93 cluster_t start_cluster;
94 uint32_t size; /* in bits */
96 uint32_t chunk_size; /* in bits */
100 char label[EXFAT_ENAME_MAX * 6 + 1]; /* a character can occupy up to
110 /* in-core nodes iterator */
111 struct exfat_iterator
113 struct exfat_node* parent;
114 struct exfat_node* current;
117 struct exfat_human_bytes
123 extern int exfat_errors;
125 void exfat_bug(const char* format, ...)
126 __attribute__((format(printf, 1, 2), noreturn));
127 void exfat_error(const char* format, ...)
128 __attribute__((format(printf, 1, 2)));
129 void exfat_warn(const char* format, ...)
130 __attribute__((format(printf, 1, 2)));
131 void exfat_debug(const char* format, ...)
132 __attribute__((format(printf, 1, 2)));
134 struct exfat_dev* exfat_open(const char* spec, enum exfat_mode mode);
135 int exfat_close(struct exfat_dev* dev);
136 int exfat_fsync(struct exfat_dev* dev);
137 enum exfat_mode exfat_mode(const struct exfat_dev* dev);
138 off_t exfat_seek(struct exfat_dev* dev, off_t offset, int whence);
139 ssize_t exfat_read(struct exfat_dev* dev, void* buffer, size_t size);
140 ssize_t exfat_write(struct exfat_dev* dev, const void* buffer, size_t size);
141 void exfat_pread(struct exfat_dev* dev, void* buffer, size_t size,
143 void exfat_pwrite(struct exfat_dev* dev, const void* buffer, size_t size,
145 ssize_t exfat_generic_pread(const struct exfat* ef, struct exfat_node* node,
146 void* buffer, size_t size, off_t offset);
147 ssize_t exfat_generic_pwrite(struct exfat* ef, struct exfat_node* node,
148 const void* buffer, size_t size, off_t offset);
150 int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
151 struct exfat_iterator* it);
152 void exfat_closedir(struct exfat* ef, struct exfat_iterator* it);
153 struct exfat_node* exfat_readdir(struct exfat* ef, struct exfat_iterator* it);
154 int exfat_lookup(struct exfat* ef, struct exfat_node** node,
156 int exfat_split(struct exfat* ef, struct exfat_node** parent,
157 struct exfat_node** node, le16_t* name, const char* path);
159 off_t exfat_c2o(const struct exfat* ef, cluster_t cluster);
160 cluster_t exfat_next_cluster(const struct exfat* ef,
161 const struct exfat_node* node, cluster_t cluster);
162 cluster_t exfat_advance_cluster(const struct exfat* ef,
163 struct exfat_node* node, uint32_t count);
164 void exfat_flush_cmap(struct exfat* ef);
165 int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size);
166 uint32_t exfat_count_free_clusters(const struct exfat* ef);
167 int exfat_find_used_sectors(const struct exfat* ef, off_t* a, off_t* b);
169 void exfat_stat(const struct exfat* ef, const struct exfat_node* node,
171 void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n);
172 uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry);
173 uint16_t exfat_add_checksum(const void* entry, uint16_t sum);
174 le16_t exfat_calc_checksum(const struct exfat_entry_meta1* meta1,
175 const struct exfat_entry_meta2* meta2, const le16_t* name);
176 uint32_t exfat_vbr_start_checksum(const void* sector, size_t size);
177 uint32_t exfat_vbr_add_checksum(const void* sector, size_t size, uint32_t sum);
178 le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name);
179 void exfat_humanize_bytes(uint64_t value, struct exfat_human_bytes* hb);
180 void exfat_print_info(const struct exfat_super_block* sb,
181 uint32_t free_clusters);
183 int utf16_to_utf8(char* output, const le16_t* input, size_t outsize,
185 int utf8_to_utf16(le16_t* output, const char* input, size_t outsize,
187 size_t utf16_length(const le16_t* str);
189 struct exfat_node* exfat_get_node(struct exfat_node* node);
190 void exfat_put_node(struct exfat* ef, struct exfat_node* node);
191 int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir);
192 void exfat_reset_cache(struct exfat* ef);
193 void exfat_flush_node(struct exfat* ef, struct exfat_node* node);
194 int exfat_unlink(struct exfat* ef, struct exfat_node* node);
195 int exfat_rmdir(struct exfat* ef, struct exfat_node* node);
196 int exfat_mknod(struct exfat* ef, const char* path);
197 int exfat_mkdir(struct exfat* ef, const char* path);
198 int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path);
199 void exfat_utimes(struct exfat_node* node, const struct timespec tv[2]);
200 void exfat_update_atime(struct exfat_node* node);
201 void exfat_update_mtime(struct exfat_node* node);
202 const char* exfat_get_label(struct exfat* ef);
203 int exfat_set_label(struct exfat* ef, const char* label);
205 int exfat_mount(struct exfat* ef, const char* spec, const char* options);
206 void exfat_unmount(struct exfat* ef);
208 time_t exfat_exfat2unix(le16_t date, le16_t time, uint8_t centisec);
209 void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time,
211 void exfat_tzset(void);
213 #endif /* ifndef EXFAT_H_INCLUDED */