implementation.
Free exFAT implementation.
- Copyright (C) 2010-2014 Andrew Nayenko
+ Copyright (C) 2010-2018 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
#ifndef EXFAT_H_INCLUDED
#define EXFAT_H_INCLUDED
+#ifndef ANDROID
+/* Android.bp is used instead of autotools when targeting Android */
+#include "config.h"
+#endif
+#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 "compiler.h"
-#include "exfatfs.h"
-#include "version.h"
-
-#define EXFAT_NAME_MAX 256
-#define EXFAT_ATTRIB_CONTIGUOUS 0x10000
-#define EXFAT_ATTRIB_CACHED 0x20000
-#define EXFAT_ATTRIB_DIRTY 0x40000
-#define EXFAT_ATTRIB_UNLINKED 0x80000
-#define IS_CONTIGUOUS(node) (((node).flags & EXFAT_ATTRIB_CONTIGUOUS) != 0)
+
+#define EXFAT_NAME_MAX 255
+/* UTF-16 encodes code points up to U+FFFF as single 16-bit code units.
+ UTF-8 uses up to 3 bytes (i.e. 8-bit code units) to encode code points
+ up to U+FFFF. One additional character is for null terminator. */
+#define EXFAT_UTF8_NAME_BUFFER_MAX (EXFAT_NAME_MAX * 3 + 1)
+#define EXFAT_UTF8_ENAME_BUFFER_MAX (EXFAT_ENAME_MAX * 3 + 1)
+
#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 CLUSTER_INVALID(sb, c) ((c) < EXFAT_FIRST_DATA_CLUSTER || \
+ (c) - EXFAT_FIRST_DATA_CLUSTER >= le32_to_cpu((sb).cluster_count))
#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_CLR(bitmap, index) \
((bitmap)[BMAP_BLOCK(index)] &= ~BMAP_MASK(index))
+#define EXFAT_REPAIR(hook, ef, ...) \
+ (exfat_ask_to_fix(ef) && exfat_fix_ ## hook(ef, __VA_ARGS__))
+
+/* 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
{
struct exfat_node* parent;
int references;
uint32_t fptr_index;
cluster_t fptr_cluster;
- cluster_t entry_cluster;
off_t entry_offset;
cluster_t start_cluster;
- int flags;
+ uint16_t attrib;
+ uint8_t continuations;
+ bool is_contiguous : 1;
+ bool is_cached : 1;
+ bool is_dirty : 1;
+ bool is_unlinked : 1;
uint64_t size;
time_t mtime, atime;
le16_t name[EXFAT_NAME_MAX + 1];
{
struct exfat_dev* dev;
struct exfat_super_block* sb;
- le16_t* upcase;
- size_t upcase_chars;
+ uint16_t* upcase;
struct exfat_node* root;
struct
{
bool dirty;
}
cmap;
- char label[UTF8_BYTES(EXFAT_ENAME_MAX) + 1];
+ char label[EXFAT_UTF8_ENAME_BUFFER_MAX];
void* zero_cluster;
int dmask, fmask;
uid_t uid;
gid_t gid;
int ro;
bool noatime;
+ enum { EXFAT_REPAIR_NO, EXFAT_REPAIR_ASK, EXFAT_REPAIR_YES } repair;
};
/* in-core nodes iterator */
};
extern int exfat_errors;
+extern int exfat_errors_fixed;
void exfat_bug(const char* format, ...) PRINTF NORETURN;
void exfat_error(const char* format, ...) PRINTF;
int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
struct exfat_iterator* it);
void exfat_closedir(struct exfat* ef, struct exfat_iterator* it);
-struct exfat_node* exfat_readdir(struct exfat* ef, struct exfat_iterator* it);
+struct exfat_node* exfat_readdir(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** parent,
const struct exfat_node* node, cluster_t cluster);
cluster_t exfat_advance_cluster(const struct exfat* ef,
struct exfat_node* node, uint32_t count);
+int exfat_flush_nodes(struct exfat* ef);
int exfat_flush(struct exfat* ef);
int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size,
bool erase);
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);
+void exfat_get_name(const struct exfat_node* node,
+ char buffer[EXFAT_UTF8_NAME_BUFFER_MAX]);
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_entry_meta1* meta1,
- const struct exfat_entry_meta2* meta2, const le16_t* name);
+le16_t exfat_calc_checksum(const struct exfat_entry* entries, int n);
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);
+le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name,
+ size_t length);
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);
uint8_t* centisec);
void exfat_tzset(void);
+bool exfat_ask_to_fix(const struct exfat* ef);
+bool exfat_fix_invalid_vbr_checksum(const struct exfat* ef, void* sector,
+ uint32_t vbr_checksum);
+bool exfat_fix_invalid_node_checksum(const struct exfat* ef,
+ struct exfat_node* node);
+bool exfat_fix_unknown_entry(struct exfat* ef, struct exfat_node* dir,
+ const struct exfat_entry* entry, off_t offset);
+
#endif /* ifndef EXFAT_H_INCLUDED */
projects / sven / exfat-utils.git / blobdiff