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>
32 #define EXFAT_VERSION_MAJOR 0
33 #define EXFAT_VERSION_MINOR 5
34 #define EXFAT_VERSION_PATCH 0
36 #define EXFAT_NAME_MAX 256
37 #define EXFAT_ATTRIB_CONTIGUOUS 0x10000
38 #define EXFAT_ATTRIB_CACHED 0x20000
39 #define EXFAT_ATTRIB_DIRTY 0x40000
40 #define EXFAT_ATTRIB_UNLINKED 0x80000
41 #define IS_CONTIGUOUS(node) (((node).flags & EXFAT_ATTRIB_CONTIGUOUS) != 0)
42 #define BLOCK_SIZE(sb) (1 << (sb).block_bits)
43 #define CLUSTER_SIZE(sb) (BLOCK_SIZE(sb) << (sb).bpc_bits)
44 #define CLUSTER_INVALID(c) ((c) == EXFAT_CLUSTER_BAD || (c) == EXFAT_CLUSTER_END)
46 #define MIN(a, b) ((a) < (b) ? (a) : (b))
47 #define DIV_ROUND_UP(x, d) (((x) + (d) - 1) / (d))
51 struct exfat_node* parent;
52 struct exfat_node* child;
53 struct exfat_node* next;
54 struct exfat_node* prev;
58 cluster_t fptr_cluster;
59 cluster_t entry_cluster;
61 cluster_t start_cluster;
65 le16_t name[EXFAT_NAME_MAX + 1];
70 struct exfat_super_block* sb;
74 struct exfat_node* root;
77 cluster_t start_cluster;
78 uint32_t size; /* in bits */
80 uint32_t chunk_size; /* in bits */
92 /* in-core nodes iterator */
95 struct exfat_node* parent;
96 struct exfat_node* current;
99 extern int exfat_errors;
101 void exfat_bug(const char* format, ...)
102 __attribute__((format(printf, 1, 2), noreturn));
103 void exfat_error(const char* format, ...)
104 __attribute__((format(printf, 1, 2)));
105 void exfat_warn(const char* format, ...)
106 __attribute__((format(printf, 1, 2)));
107 void exfat_debug(const char* format, ...)
108 __attribute__((format(printf, 1, 2)));
110 void exfat_read_raw(void* buffer, size_t size, off_t offset, int fd);
111 void exfat_write_raw(const void* buffer, size_t size, off_t offset, int fd);
112 ssize_t exfat_read(const struct exfat* ef, struct exfat_node* node,
113 void* buffer, size_t size, off_t offset);
114 ssize_t exfat_write(struct exfat* ef, struct exfat_node* node,
115 const void* buffer, size_t size, off_t offset);
117 int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
118 struct exfat_iterator* it);
119 void exfat_closedir(struct exfat* ef, struct exfat_iterator* it);
120 struct exfat_node* exfat_readdir(struct exfat* ef, struct exfat_iterator* it);
121 int exfat_lookup(struct exfat* ef, struct exfat_node** node,
123 int exfat_split(struct exfat* ef, struct exfat_node** parent,
124 struct exfat_node** node, le16_t* name, const char* path);
126 off_t exfat_c2o(const struct exfat* ef, cluster_t cluster);
127 cluster_t exfat_next_cluster(const struct exfat* ef,
128 const struct exfat_node* node, cluster_t cluster);
129 cluster_t exfat_advance_cluster(const struct exfat* ef,
130 struct exfat_node* node, uint32_t count);
131 void exfat_flush_cmap(struct exfat* ef);
132 int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size);
133 uint32_t exfat_count_free_clusters(struct exfat* ef);
135 void exfat_stat(const struct exfat* ef, const struct exfat_node* node,
137 time_t exfat_exfat2unix(le16_t date, le16_t time);
138 void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time);
139 void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n);
140 uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry);
141 uint16_t exfat_add_checksum(const void* entry, uint16_t sum);
142 le16_t exfat_calc_checksum(const struct exfat_entry_meta1* meta1,
143 const struct exfat_entry_meta2* meta2, const le16_t* name);
144 le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name);
146 int utf16_to_utf8(char* output, const le16_t* input, size_t outsize,
148 int utf8_to_utf16(le16_t* output, const char* input, size_t outsize,
150 size_t utf16_length(const le16_t* str);
152 struct exfat_node* exfat_get_node(struct exfat_node* node);
153 void exfat_put_node(struct exfat* ef, struct exfat_node* node);
154 int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir);
155 void exfat_reset_cache(struct exfat* ef);
156 void exfat_flush_node(struct exfat* ef, struct exfat_node* node);
157 int exfat_unlink(struct exfat* ef, struct exfat_node* node);
158 int exfat_rmdir(struct exfat* ef, struct exfat_node* node);
159 int exfat_mknod(struct exfat* ef, const char* path);
160 int exfat_mkdir(struct exfat* ef, const char* path);
161 int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path);
162 void exfat_utimes(struct exfat_node* node, const struct timespec tv[2]);
163 void exfat_update_atime(struct exfat_node* node);
164 void exfat_update_mtime(struct exfat_node* node);
166 int exfat_mount(struct exfat* ef, const char* spec, const char* options);
167 void exfat_unmount(struct exfat* ef);
169 #endif /* ifndef EXFAT_H_INCLUDED */