X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=libexfat%2Fexfat.h;h=8b74f2c94f344ce6dfa4a756092067abb2510ea3;hb=cf962cdfdd7fe80ae8dac93d689c90cc55350a2a;hp=5887a437bfad9f2c3a8e1961d147b949a841d77d;hpb=a595902c18e42baf34b17525e7004354db8a7905;p=android-x86%2Fexternal-exfat.git diff --git a/libexfat/exfat.h b/libexfat/exfat.h index 5887a43..8b74f2c 100644 --- a/libexfat/exfat.h +++ b/libexfat/exfat.h @@ -1,36 +1,69 @@ /* - * 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) 2010-2016 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 #include #include +#include #include #include -#include "exfatfs.h" -#define EXFAT_VERSION_MAJOR 0 -#define EXFAT_VERSION_MINOR 5 +#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 EXFAT_NAME_MAX 256 -#define EXFAT_ATTRIB_CONTIGUOUS 0x10000 -#define EXFAT_ATTRIB_CACHED 0x20000 -#define EXFAT_ATTRIB_DIRTY 0x40000 -#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 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 { @@ -45,29 +78,48 @@ struct exfat_node 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]; }; +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; + uint16_t* upcase; struct exfat_node* root; struct { 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[EXFAT_UTF8_ENAME_BUFFER_MAX]; + void* zero_cluster; + int dmask, fmask; + uid_t uid; + gid_t gid; + int ro; + bool noatime; }; /* in-core nodes iterator */ @@ -77,18 +129,34 @@ struct exfat_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, @@ -97,34 +165,66 @@ void exfat_closedir(struct exfat* ef, struct exfat_iterator* it); 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** 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); -void exfat_get_name(const struct exfat_node* node, char* buffer, size_t n); -uint16_t exfat_start_checksum(const struct exfat_file* entry); +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); +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[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); +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, + 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); int utf16_to_utf8(char* output, const le16_t* input, size_t outsize, size_t insize); int utf8_to_utf16(le16_t* output, const char* input, size_t outsize, size_t insize); +size_t utf16_length(const le16_t* str); 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_mount(struct exfat* ef, const char* spec); +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 */