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256 lines
9.0 KiB
C
256 lines
9.0 KiB
C
/*
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exfat.h (29.08.09)
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Definitions of structures and constants used in exFAT file system
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implementation.
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Free exFAT implementation.
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Copyright (C) 2010-2018 Andrew Nayenko
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef EXFAT_H_INCLUDED
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#define EXFAT_H_INCLUDED
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#ifndef ANDROID
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/* Android.bp is used instead of autotools when targeting Android */
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#include "config.h"
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#endif
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#include "compiler.h"
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#include "exfatfs.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <stdbool.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#define EXFAT_NAME_MAX 255
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/* UTF-16 encodes code points up to U+FFFF as single 16-bit code units.
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UTF-8 uses up to 3 bytes (i.e. 8-bit code units) to encode code points
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up to U+FFFF. One additional character is for null terminator. */
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#define EXFAT_UTF8_NAME_BUFFER_MAX (EXFAT_NAME_MAX * 3 + 1)
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#define EXFAT_UTF8_ENAME_BUFFER_MAX (EXFAT_ENAME_MAX * 3 + 1)
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#define SECTOR_SIZE(sb) (1 << (sb).sector_bits)
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#define CLUSTER_SIZE(sb) (SECTOR_SIZE(sb) << (sb).spc_bits)
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#define CLUSTER_INVALID(sb, c) ((c) < EXFAT_FIRST_DATA_CLUSTER || \
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(c) - EXFAT_FIRST_DATA_CLUSTER >= le32_to_cpu((sb).cluster_count))
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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#define DIV_ROUND_UP(x, d) (((x) + (d) - 1) / (d))
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#define ROUND_UP(x, d) (DIV_ROUND_UP(x, d) * (d))
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#define BMAP_SIZE(count) (ROUND_UP(count, sizeof(bitmap_t) * 8) / 8)
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#define BMAP_BLOCK(index) ((index) / sizeof(bitmap_t) / 8)
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#define BMAP_MASK(index) ((bitmap_t) 1 << ((index) % (sizeof(bitmap_t) * 8)))
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#define BMAP_GET(bitmap, index) \
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((bitmap)[BMAP_BLOCK(index)] & BMAP_MASK(index))
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#define BMAP_SET(bitmap, index) \
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((bitmap)[BMAP_BLOCK(index)] |= BMAP_MASK(index))
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#define BMAP_CLR(bitmap, index) \
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((bitmap)[BMAP_BLOCK(index)] &= ~BMAP_MASK(index))
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#define EXFAT_REPAIR(hook, ef, ...) \
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(exfat_ask_to_fix(ef) && exfat_fix_ ## hook(ef, __VA_ARGS__))
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/* The size of off_t type must be 64 bits. File systems larger than 2 GB will
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be corrupted with 32-bit off_t. */
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STATIC_ASSERT(sizeof(off_t) == 8);
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struct exfat_node
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{
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struct exfat_node* parent;
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struct exfat_node* child;
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struct exfat_node* next;
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struct exfat_node* prev;
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int references;
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uint32_t fptr_index;
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cluster_t fptr_cluster;
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off_t entry_offset;
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cluster_t start_cluster;
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uint16_t attrib;
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uint8_t continuations;
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bool is_contiguous : 1;
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bool is_cached : 1;
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bool is_dirty : 1;
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bool is_unlinked : 1;
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uint64_t size;
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time_t mtime, atime;
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le16_t name[EXFAT_NAME_MAX + 1];
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};
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enum exfat_mode
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{
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EXFAT_MODE_RO,
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EXFAT_MODE_RW,
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EXFAT_MODE_ANY,
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};
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struct exfat_dev;
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struct exfat
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{
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struct exfat_dev* dev;
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struct exfat_super_block* sb;
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uint16_t* upcase;
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struct exfat_node* root;
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struct
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{
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cluster_t start_cluster;
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uint32_t size; /* in bits */
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bitmap_t* chunk;
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uint32_t chunk_size; /* in bits */
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bool dirty;
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}
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cmap;
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char label[EXFAT_UTF8_ENAME_BUFFER_MAX];
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void* zero_cluster;
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int dmask, fmask;
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uid_t uid;
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gid_t gid;
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int ro;
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bool noatime;
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enum { EXFAT_REPAIR_NO, EXFAT_REPAIR_ASK, EXFAT_REPAIR_YES } repair;
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};
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/* in-core nodes iterator */
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struct exfat_iterator
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{
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struct exfat_node* parent;
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struct exfat_node* current;
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};
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struct exfat_human_bytes
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{
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uint64_t value;
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const char* unit;
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};
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extern int exfat_errors;
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extern int exfat_errors_fixed;
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#define VLOG_LOG 1
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#define VLOG_DEBUG 2
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void ventoy_syslog_newline(int level, const char *Fmt, ...);
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#define exfat_bug(fmt, args...) ventoy_syslog_newline(VLOG_LOG, fmt, ##args)
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#define exfat_error(fmt, args...) ventoy_syslog_newline(VLOG_LOG, fmt, ##args)
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#define exfat_error(fmt, args...) ventoy_syslog_newline(VLOG_LOG, fmt, ##args)
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#define exfat_warn(fmt, args...) ventoy_syslog_newline(VLOG_LOG, fmt, ##args)
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#define exfat_debug(fmt, args...) ventoy_syslog_newline(VLOG_DEBUG, fmt, ##args)
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#if 0
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void exfat_bug(const char* format, ...) PRINTF NORETURN;
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void exfat_error(const char* format, ...) PRINTF;
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void exfat_warn(const char* format, ...) PRINTF;
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void exfat_debug(const char* format, ...) PRINTF;
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#endif /* #if 0 */
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struct exfat_dev* exfat_open(const char* spec, enum exfat_mode mode);
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int exfat_close(struct exfat_dev* dev);
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int exfat_fsync(struct exfat_dev* dev);
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enum exfat_mode exfat_get_mode(const struct exfat_dev* dev);
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off_t exfat_get_size(const struct exfat_dev* dev);
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off_t exfat_seek(struct exfat_dev* dev, off_t offset, int whence);
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ssize_t exfat_read(struct exfat_dev* dev, void* buffer, size_t size);
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ssize_t exfat_write(struct exfat_dev* dev, const void* buffer, size_t size);
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ssize_t exfat_pread(struct exfat_dev* dev, void* buffer, size_t size,
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off_t offset);
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ssize_t exfat_pwrite(struct exfat_dev* dev, const void* buffer, size_t size,
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off_t offset);
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ssize_t exfat_generic_pread(const struct exfat* ef, struct exfat_node* node,
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void* buffer, size_t size, off_t offset);
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ssize_t exfat_generic_pwrite(struct exfat* ef, struct exfat_node* node,
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const void* buffer, size_t size, off_t offset);
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int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
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struct exfat_iterator* it);
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void exfat_closedir(struct exfat* ef, struct exfat_iterator* it);
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struct exfat_node* exfat_readdir(struct exfat_iterator* it);
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int exfat_lookup(struct exfat* ef, struct exfat_node** node,
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const char* path);
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int exfat_split(struct exfat* ef, struct exfat_node** parent,
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struct exfat_node** node, le16_t* name, const char* path);
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off_t exfat_c2o(const struct exfat* ef, cluster_t cluster);
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cluster_t exfat_next_cluster(const struct exfat* ef,
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const struct exfat_node* node, cluster_t cluster);
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cluster_t exfat_advance_cluster(const struct exfat* ef,
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struct exfat_node* node, uint32_t count);
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int exfat_flush_nodes(struct exfat* ef);
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int exfat_flush(struct exfat* ef);
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int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size,
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bool erase);
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uint32_t exfat_count_free_clusters(const struct exfat* ef);
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int exfat_find_used_sectors(const struct exfat* ef, off_t* a, off_t* b);
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void exfat_stat(const struct exfat* ef, const struct exfat_node* node,
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struct stat* stbuf);
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void exfat_get_name(const struct exfat_node* node,
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char buffer[EXFAT_UTF8_NAME_BUFFER_MAX]);
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uint16_t exfat_start_checksum(const struct exfat_entry_meta1* entry);
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uint16_t exfat_add_checksum(const void* entry, uint16_t sum);
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le16_t exfat_calc_checksum(const struct exfat_entry* entries, int n);
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uint32_t exfat_vbr_start_checksum(const void* sector, size_t size);
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uint32_t exfat_vbr_add_checksum(const void* sector, size_t size, uint32_t sum);
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le16_t exfat_calc_name_hash(const struct exfat* ef, const le16_t* name,
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size_t length);
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void exfat_humanize_bytes(uint64_t value, struct exfat_human_bytes* hb);
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void exfat_print_info(const struct exfat_super_block* sb,
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uint32_t free_clusters);
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int utf16_to_utf8(char* output, const le16_t* input, size_t outsize,
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size_t insize);
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int utf8_to_utf16(le16_t* output, const char* input, size_t outsize,
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size_t insize);
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size_t utf16_length(const le16_t* str);
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struct exfat_node* exfat_get_node(struct exfat_node* node);
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void exfat_put_node(struct exfat* ef, struct exfat_node* node);
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int exfat_cleanup_node(struct exfat* ef, struct exfat_node* node);
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int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir);
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void exfat_reset_cache(struct exfat* ef);
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int exfat_flush_node(struct exfat* ef, struct exfat_node* node);
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int exfat_unlink(struct exfat* ef, struct exfat_node* node);
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int exfat_rmdir(struct exfat* ef, struct exfat_node* node);
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int exfat_mknod(struct exfat* ef, const char* path);
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int exfat_mkdir(struct exfat* ef, const char* path);
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int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path);
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void exfat_utimes(struct exfat_node* node, const struct timespec tv[2]);
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void exfat_update_atime(struct exfat_node* node);
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void exfat_update_mtime(struct exfat_node* node);
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const char* exfat_get_label(struct exfat* ef);
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int exfat_set_label(struct exfat* ef, const char* label);
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int exfat_mount(struct exfat* ef, const char* spec, const char* options);
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void exfat_unmount(struct exfat* ef);
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time_t exfat_exfat2unix(le16_t date, le16_t time, uint8_t centisec);
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void exfat_unix2exfat(time_t unix_time, le16_t* date, le16_t* time,
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uint8_t* centisec);
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void exfat_tzset(void);
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bool exfat_ask_to_fix(const struct exfat* ef);
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bool exfat_fix_invalid_vbr_checksum(const struct exfat* ef, void* sector,
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uint32_t vbr_checksum);
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bool exfat_fix_invalid_node_checksum(const struct exfat* ef,
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struct exfat_node* node);
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bool exfat_fix_unknown_entry(struct exfat* ef, struct exfat_node* dir,
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const struct exfat_entry* entry, off_t offset);
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#endif /* ifndef EXFAT_H_INCLUDED */
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