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))
48 struct exfat_node* parent;
49 struct exfat_node* child;
50 struct exfat_node* next;
51 struct exfat_node* prev;
55 cluster_t fptr_cluster;
56 cluster_t entry_cluster;
58 cluster_t start_cluster;
62 le16_t name[EXFAT_NAME_MAX + 1];
67 struct exfat_super_block* sb;
71 struct exfat_node* root;
74 cluster_t start_cluster;
75 uint32_t size; /* in bits */
77 uint32_t chunk_size; /* in bits */
89 /* in-core nodes iterator */
92 struct exfat_node* parent;
93 struct exfat_node* current;
96 extern int exfat_errors;
98 void exfat_bug(const char* format, ...)
99 __attribute__((format(printf, 1, 2), noreturn));
100 void exfat_error(const char* format, ...)
101 __attribute__((format(printf, 1, 2)));
102 void exfat_warn(const char* format, ...)
103 __attribute__((format(printf, 1, 2)));
104 void exfat_debug(const char* format, ...)
105 __attribute__((format(printf, 1, 2)));
107 void exfat_read_raw(void* buffer, size_t size, off_t offset, int fd);
108 void exfat_write_raw(const void* buffer, size_t size, off_t offset, int fd);
109 ssize_t exfat_read(const struct exfat* ef, struct exfat_node* node,
110 void* buffer, size_t size, off_t offset);
111 ssize_t exfat_write(struct exfat* ef, struct exfat_node* node,
112 const void* buffer, size_t size, off_t offset);
114 int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
115 struct exfat_iterator* it);
116 void exfat_closedir(struct exfat* ef, struct exfat_iterator* it);
117 struct exfat_node* exfat_readdir(struct exfat* ef, struct exfat_iterator* it);
118 int exfat_lookup(struct exfat* ef, struct exfat_node** node,
120 int exfat_split(struct exfat* ef, struct exfat_node** parent,
121 struct exfat_node** node, le16_t* name, const char* path);
123 off_t exfat_c2o(const struct exfat* ef, cluster_t cluster);
124 cluster_t exfat_next_cluster(const struct exfat* ef,
125 const struct exfat_node* node, cluster_t cluster);
126 cluster_t exfat_advance_cluster(const struct exfat* ef,
127 struct exfat_node* node, uint32_t count);
128 void exfat_flush_cmap(struct exfat* ef);
129 int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size);
130 uint32_t exfat_count_free_clusters(struct exfat* ef);
132 void exfat_stat(const struct exfat* ef, const struct exfat_node* node,
134 time_t exfat_exfat2unix(le16_t date, le16_t time, uint8_t centisec);
135 void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time,
137 void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n);
138 uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry);
139 uint16_t exfat_add_checksum(const void* entry, uint16_t sum);
140 le16_t exfat_calc_checksum(const struct exfat_entry_meta1* meta1,
141 const struct exfat_entry_meta2* meta2, const le16_t* name);
142 le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name);
144 int utf16_to_utf8(char* output, const le16_t* input, size_t outsize,
146 int utf8_to_utf16(le16_t* output, const char* input, size_t outsize,
148 size_t utf16_length(const le16_t* str);
150 struct exfat_node* exfat_get_node(struct exfat_node* node);
151 void exfat_put_node(struct exfat* ef, struct exfat_node* node);
152 int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir);
153 void exfat_reset_cache(struct exfat* ef);
154 void exfat_flush_node(struct exfat* ef, struct exfat_node* node);
155 int exfat_unlink(struct exfat* ef, struct exfat_node* node);
156 int exfat_rmdir(struct exfat* ef, struct exfat_node* node);
157 int exfat_mknod(struct exfat* ef, const char* path);
158 int exfat_mkdir(struct exfat* ef, const char* path);
159 int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path);
160 void exfat_utimes(struct exfat_node* node, const struct timespec tv[2]);
161 void exfat_update_atime(struct exfat_node* node);
162 void exfat_update_mtime(struct exfat_node* node);
164 int exfat_mount(struct exfat* ef, const char* spec, const char* options);
165 void exfat_unmount(struct exfat* ef);
167 #endif /* ifndef EXFAT_H_INCLUDED */