X-Git-Url: https://git.sven.stormbind.net/?p=sven%2Fexfat-utils.git;a=blobdiff_plain;f=libexfat%2Fexfat.h;h=2342be4f531a5b0c489e81ee0710186b6a00dab2;hp=2a881e4a6bc97810daec09895466caa71c0449ff;hb=b389db553b85947429af3c455bb324da02429abd;hpb=f77812e8b678b8bf620bfbf33882139997ccda34 diff --git a/libexfat/exfat.h b/libexfat/exfat.h index 2a881e4..2342be4 100644 --- a/libexfat/exfat.h +++ b/libexfat/exfat.h @@ -4,7 +4,7 @@ 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 @@ -24,32 +24,35 @@ #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 #include #include #include #include #include -#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) @@ -61,6 +64,13 @@ #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; @@ -71,10 +81,14 @@ struct exfat_node 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]; @@ -93,8 +107,7 @@ struct exfat { struct exfat_dev* dev; struct exfat_super_block* sb; - le16_t* upcase; - size_t upcase_chars; + uint16_t* upcase; struct exfat_node* root; struct { @@ -105,13 +118,14 @@ struct exfat 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 */ @@ -128,6 +142,7 @@ struct exfat_human_bytes }; extern int exfat_errors; +extern int exfat_errors_fixed; void exfat_bug(const char* format, ...) PRINTF NORETURN; void exfat_error(const char* format, ...) PRINTF; @@ -154,7 +169,7 @@ ssize_t exfat_generic_pwrite(struct exfat* ef, struct exfat_node* node, 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, @@ -165,6 +180,7 @@ 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); +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); @@ -173,14 +189,15 @@ 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); +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); @@ -216,4 +233,12 @@ void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time, 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 */