/*
- * exfat.h
- * Definitions of structures and constants used in exFAT file system
- * implementation.
- *
- * Created by Andrew Nayenko on 29.08.09.
- * This software is distributed under the GNU General Public License
- * version 3 or any later.
- */
+ exfat.h (29.08.09)
+ Definitions of structures and constants used in exFAT file system
+ implementation.
+
+ Free exFAT implementation.
+ Copyright (C) 2010-2015 Andrew Nayenko
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
#ifndef EXFAT_H_INCLUDED
#define EXFAT_H_INCLUDED
+#include "config.h"
+#include "compiler.h"
+#include "exfatfs.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
+#include <stdbool.h>
#include <sys/stat.h>
#include <sys/types.h>
-#include "exfatfs.h"
-
-#define EXFAT_VERSION_MAJOR 0
-#define EXFAT_VERSION_MINOR 5
#define EXFAT_NAME_MAX 256
#define EXFAT_ATTRIB_CONTIGUOUS 0x10000
#define EXFAT_ATTRIB_DIRTY 0x40000
#define EXFAT_ATTRIB_UNLINKED 0x80000
#define IS_CONTIGUOUS(node) (((node).flags & EXFAT_ATTRIB_CONTIGUOUS) != 0)
-#define BLOCK_SIZE(sb) (1 << (sb).block_bits)
-#define CLUSTER_SIZE(sb) (BLOCK_SIZE(sb) << (sb).bpc_bits)
-#define CLUSTER_INVALID(c) ((c) == EXFAT_CLUSTER_BAD || (c) == EXFAT_CLUSTER_END)
+#define SECTOR_SIZE(sb) (1 << (sb).sector_bits)
+#define CLUSTER_SIZE(sb) (SECTOR_SIZE(sb) << (sb).spc_bits)
+#define CLUSTER_INVALID(c) \
+ ((c) < EXFAT_FIRST_DATA_CLUSTER || (c) > EXFAT_LAST_DATA_CLUSTER)
#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define DIV_ROUND_UP(x, d) (((x) + (d) - 1) / (d))
+#define ROUND_UP(x, d) (DIV_ROUND_UP(x, d) * (d))
+#define UTF8_BYTES(c) ((c) * 6) /* UTF-8 character can occupy up to 6 bytes */
+
+#define BMAP_SIZE(count) (ROUND_UP(count, sizeof(bitmap_t) * 8) / 8)
+#define BMAP_BLOCK(index) ((index) / sizeof(bitmap_t) / 8)
+#define BMAP_MASK(index) ((bitmap_t) 1 << ((index) % (sizeof(bitmap_t) * 8)))
+#define BMAP_GET(bitmap, index) \
+ ((bitmap)[BMAP_BLOCK(index)] & BMAP_MASK(index))
+#define BMAP_SET(bitmap, index) \
+ ((bitmap)[BMAP_BLOCK(index)] |= BMAP_MASK(index))
+#define BMAP_CLR(bitmap, index) \
+ ((bitmap)[BMAP_BLOCK(index)] &= ~BMAP_MASK(index))
+
+/* The size of off_t type must be 64 bits. File systems larger than 2 GB will
+ be corrupted with 32-bit off_t. */
+STATIC_ASSERT(sizeof(off_t) == 8);
struct exfat_node
{
le16_t name[EXFAT_NAME_MAX + 1];
};
+enum exfat_mode
+{
+ EXFAT_MODE_RO,
+ EXFAT_MODE_RW,
+ EXFAT_MODE_ANY,
+};
+
+struct exfat_dev;
+
struct exfat
{
+ struct exfat_dev* dev;
struct exfat_super_block* sb;
- int fd;
le16_t* upcase;
size_t upcase_chars;
struct exfat_node* root;
{
cluster_t start_cluster;
uint32_t size; /* in bits */
- uint8_t* chunk;
+ bitmap_t* chunk;
uint32_t chunk_size; /* in bits */
- int dirty;
+ bool dirty;
}
cmap;
- void* zero_block;
+ char label[UTF8_BYTES(EXFAT_ENAME_MAX) + 1];
+ void* zero_cluster;
+ int dmask, fmask;
+ uid_t uid;
+ gid_t gid;
+ int ro;
+ bool noatime;
};
/* in-core nodes iterator */
struct exfat_node* current;
};
-extern int exfat_errors;
+struct exfat_human_bytes
+{
+ uint64_t value;
+ const char* unit;
+};
-void exfat_bug(const char* format, ...);
-void exfat_error(const char* format, ...);
-void exfat_warn(const char* format, ...);
-void exfat_debug(const char* format, ...);
+extern int exfat_errors;
-void exfat_read_raw(void* buffer, size_t size, off_t offset, int fd);
-void exfat_write_raw(const void* buffer, size_t size, off_t offset, int fd);
-ssize_t exfat_read(const struct exfat* ef, struct exfat_node* node,
+void exfat_bug(const char* format, ...) PRINTF NORETURN;
+void exfat_error(const char* format, ...) PRINTF;
+void exfat_warn(const char* format, ...) PRINTF;
+void exfat_debug(const char* format, ...) PRINTF;
+
+struct exfat_dev* exfat_open(const char* spec, enum exfat_mode mode);
+int exfat_close(struct exfat_dev* dev);
+int exfat_fsync(struct exfat_dev* dev);
+enum exfat_mode exfat_get_mode(const struct exfat_dev* dev);
+off_t exfat_get_size(const struct exfat_dev* dev);
+off_t exfat_seek(struct exfat_dev* dev, off_t offset, int whence);
+ssize_t exfat_read(struct exfat_dev* dev, void* buffer, size_t size);
+ssize_t exfat_write(struct exfat_dev* dev, const void* buffer, size_t size);
+ssize_t exfat_pread(struct exfat_dev* dev, void* buffer, size_t size,
+ off_t offset);
+ssize_t exfat_pwrite(struct exfat_dev* dev, const void* buffer, size_t size,
+ off_t offset);
+ssize_t exfat_generic_pread(const struct exfat* ef, struct exfat_node* node,
void* buffer, size_t size, off_t offset);
-ssize_t exfat_write(struct exfat* ef, struct exfat_node* node,
+ssize_t exfat_generic_pwrite(struct exfat* ef, struct exfat_node* node,
const void* buffer, size_t size, off_t offset);
int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
struct exfat_node* exfat_readdir(struct exfat* ef, struct exfat_iterator* it);
int exfat_lookup(struct exfat* ef, struct exfat_node** node,
const char* path);
-int exfat_split(struct exfat* ef, struct exfat_node** node, le16_t* name,
- const char* path);
+int exfat_split(struct exfat* ef, struct exfat_node** parent,
+ struct exfat_node** node, le16_t* name, const char* path);
off_t exfat_c2o(const struct exfat* ef, cluster_t cluster);
cluster_t exfat_next_cluster(const struct exfat* ef,
const struct exfat_node* node, cluster_t cluster);
cluster_t exfat_advance_cluster(const struct exfat* ef,
struct exfat_node* node, uint32_t count);
-void exfat_flush_cmap(struct exfat* ef);
-int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size);
-
-void exfat_stat(const struct exfat_node* node, struct stat *stbuf);
-time_t exfat_exfat2unix(le16_t date, le16_t time);
-void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time);
+int exfat_flush(struct exfat* ef);
+int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size,
+ bool erase);
+uint32_t exfat_count_free_clusters(const struct exfat* ef);
+int exfat_find_used_sectors(const struct exfat* ef, off_t* a, off_t* b);
+
+void exfat_stat(const struct exfat* ef, const struct exfat_node* node,
+ struct stat* stbuf);
void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n);
-uint16_t exfat_start_checksum(const struct exfat_file* entry);
+uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry);
uint16_t exfat_add_checksum(const void* entry, uint16_t sum);
-le16_t exfat_calc_checksum(const struct exfat_file* meta1,
- const struct exfat_file_info* meta2, const le16_t* name);
+le16_t exfat_calc_checksum(const struct exfat_entry_meta1* meta1,
+ const struct exfat_entry_meta2* meta2, const le16_t* name);
+uint32_t exfat_vbr_start_checksum(const void* sector, size_t size);
+uint32_t exfat_vbr_add_checksum(const void* sector, size_t size, uint32_t sum);
le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name);
+void exfat_humanize_bytes(uint64_t value, struct exfat_human_bytes* hb);
+void exfat_print_info(const struct exfat_super_block* sb,
+ uint32_t free_clusters);
int utf16_to_utf8(char* output, const le16_t* input, size_t outsize,
size_t insize);
struct exfat_node* exfat_get_node(struct exfat_node* node);
void exfat_put_node(struct exfat* ef, struct exfat_node* node);
+int exfat_cleanup_node(struct exfat* ef, struct exfat_node* node);
int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir);
void exfat_reset_cache(struct exfat* ef);
-void exfat_flush_node(struct exfat* ef, struct exfat_node* node);
+int exfat_flush_node(struct exfat* ef, struct exfat_node* node);
int exfat_unlink(struct exfat* ef, struct exfat_node* node);
int exfat_rmdir(struct exfat* ef, struct exfat_node* node);
int exfat_mknod(struct exfat* ef, const char* path);
int exfat_mkdir(struct exfat* ef, const char* path);
+int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path);
+void exfat_utimes(struct exfat_node* node, const struct timespec tv[2]);
+void exfat_update_atime(struct exfat_node* node);
+void exfat_update_mtime(struct exfat_node* node);
+const char* exfat_get_label(struct exfat* ef);
+int exfat_set_label(struct exfat* ef, const char* label);
int exfat_mount(struct exfat* ef, const char* spec, const char* options);
void exfat_unmount(struct exfat* ef);
+time_t exfat_exfat2unix(le16_t date, le16_t time, uint8_t centisec);
+void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time,
+ uint8_t* centisec);
+void exfat_tzset(void);
+
#endif /* ifndef EXFAT_H_INCLUDED */
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