mirror of https://gitee.com/openkylin/linux.git
exfat: add in-memory and on-disk structures and headers
This adds in-memory and on-disk structures and headers. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Sungjong Seo <sj1557.seo@samsung.com> Reviewed-by: Pali Rohár <pali.rohar@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Namjae Jeon
Al Viro
parent
bb6d3fb354
commit
1acf1a564b
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@ -0,0 +1,519 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
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*/
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#ifndef _EXFAT_FS_H
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#define _EXFAT_FS_H
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#include <linux/fs.h>
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#include <linux/ratelimit.h>
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#include <linux/nls.h>
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#define EXFAT_SUPER_MAGIC 0x2011BAB0UL
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#define EXFAT_ROOT_INO 1
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#define EXFAT_SB_DIRTY 0
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#define EXFAT_CLUSTERS_UNTRACKED (~0u)
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/*
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* exfat error flags
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*/
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enum exfat_error_mode {
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EXFAT_ERRORS_CONT, /* ignore error and continue */
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EXFAT_ERRORS_PANIC, /* panic on error */
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EXFAT_ERRORS_RO, /* remount r/o on error */
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};
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/*
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* exfat nls lossy flag
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*/
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enum {
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NLS_NAME_NO_LOSSY, /* no lossy */
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NLS_NAME_LOSSY, /* just detected incorrect filename(s) */
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NLS_NAME_OVERLEN, /* the length is over than its limit */
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};
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#define EXFAT_HASH_BITS 8
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#define EXFAT_HASH_SIZE (1UL << EXFAT_HASH_BITS)
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/*
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* Type Definitions
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*/
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#define ES_2_ENTRIES 2
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#define ES_ALL_ENTRIES 0
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#define DIR_DELETED 0xFFFF0321
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/* type values */
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#define TYPE_UNUSED 0x0000
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#define TYPE_DELETED 0x0001
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#define TYPE_INVALID 0x0002
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#define TYPE_CRITICAL_PRI 0x0100
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#define TYPE_BITMAP 0x0101
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#define TYPE_UPCASE 0x0102
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#define TYPE_VOLUME 0x0103
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#define TYPE_DIR 0x0104
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#define TYPE_FILE 0x011F
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#define TYPE_CRITICAL_SEC 0x0200
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#define TYPE_STREAM 0x0201
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#define TYPE_EXTEND 0x0202
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#define TYPE_ACL 0x0203
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#define TYPE_BENIGN_PRI 0x0400
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#define TYPE_GUID 0x0401
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#define TYPE_PADDING 0x0402
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#define TYPE_ACLTAB 0x0403
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#define TYPE_BENIGN_SEC 0x0800
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#define TYPE_ALL 0x0FFF
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#define MAX_CHARSET_SIZE 6 /* max size of multi-byte character */
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#define MAX_NAME_LENGTH 255 /* max len of file name excluding NULL */
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#define MAX_VFSNAME_BUF_SIZE ((MAX_NAME_LENGTH + 1) * MAX_CHARSET_SIZE)
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#define FAT_CACHE_SIZE 128
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#define FAT_CACHE_HASH_SIZE 64
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#define BUF_CACHE_SIZE 256
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#define BUF_CACHE_HASH_SIZE 64
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#define EXFAT_HINT_NONE -1
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#define EXFAT_MIN_SUBDIR 2
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/*
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* helpers for cluster size to byte conversion.
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*/
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#define EXFAT_CLU_TO_B(b, sbi) ((b) << (sbi)->cluster_size_bits)
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#define EXFAT_B_TO_CLU(b, sbi) ((b) >> (sbi)->cluster_size_bits)
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#define EXFAT_B_TO_CLU_ROUND_UP(b, sbi) \
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(((b - 1) >> (sbi)->cluster_size_bits) + 1)
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#define EXFAT_CLU_OFFSET(off, sbi) ((off) & ((sbi)->cluster_size - 1))
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/*
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* helpers for block size to byte conversion.
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*/
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#define EXFAT_BLK_TO_B(b, sb) ((b) << (sb)->s_blocksize_bits)
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#define EXFAT_B_TO_BLK(b, sb) ((b) >> (sb)->s_blocksize_bits)
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#define EXFAT_B_TO_BLK_ROUND_UP(b, sb) \
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(((b - 1) >> (sb)->s_blocksize_bits) + 1)
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#define EXFAT_BLK_OFFSET(off, sb) ((off) & ((sb)->s_blocksize - 1))
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/*
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* helpers for block size to dentry size conversion.
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*/
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#define EXFAT_B_TO_DEN_IDX(b, sbi) \
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((b) << ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS))
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#define EXFAT_B_TO_DEN(b) ((b) >> DENTRY_SIZE_BITS)
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#define EXFAT_DEN_TO_B(b) ((b) << DENTRY_SIZE_BITS)
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/*
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* helpers for fat entry.
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*/
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#define FAT_ENT_SIZE (4)
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#define FAT_ENT_SIZE_BITS (2)
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#define FAT_ENT_OFFSET_SECTOR(sb, loc) (EXFAT_SB(sb)->FAT1_start_sector + \
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(((u64)loc << FAT_ENT_SIZE_BITS) >> sb->s_blocksize_bits))
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#define FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc) \
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((loc << FAT_ENT_SIZE_BITS) & (sb->s_blocksize - 1))
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/*
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* helpers for bitmap.
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*/
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#define CLUSTER_TO_BITMAP_ENT(clu) ((clu) - EXFAT_RESERVED_CLUSTERS)
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#define BITMAP_ENT_TO_CLUSTER(ent) ((ent) + EXFAT_RESERVED_CLUSTERS)
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#define BITS_PER_SECTOR(sb) ((sb)->s_blocksize * BITS_PER_BYTE)
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#define BITS_PER_SECTOR_MASK(sb) (BITS_PER_SECTOR(sb) - 1)
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#define BITMAP_OFFSET_SECTOR_INDEX(sb, ent) \
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((ent / BITS_PER_BYTE) >> (sb)->s_blocksize_bits)
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#define BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent) (ent & BITS_PER_SECTOR_MASK(sb))
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#define BITMAP_OFFSET_BYTE_IN_SECTOR(sb, ent) \
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((ent / BITS_PER_BYTE) & ((sb)->s_blocksize - 1))
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#define BITS_PER_BYTE_MASK 0x7
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#define IGNORED_BITS_REMAINED(clu, clu_base) ((1 << ((clu) - (clu_base))) - 1)
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struct exfat_dentry_namebuf {
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char *lfn;
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int lfnbuf_len; /* usally MAX_UNINAME_BUF_SIZE */
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};
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/* unicode name structure */
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struct exfat_uni_name {
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/* +3 for null and for converting */
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unsigned short name[MAX_NAME_LENGTH + 3];
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unsigned short name_hash;
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unsigned char name_len;
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};
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/* directory structure */
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struct exfat_chain {
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unsigned int dir;
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unsigned int size;
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unsigned char flags;
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};
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/* first empty entry hint information */
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struct exfat_hint_femp {
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/* entry index of a directory */
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int eidx;
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/* count of continuous empty entry */
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int count;
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/* the cluster that first empty slot exists in */
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struct exfat_chain cur;
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};
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/* hint structure */
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struct exfat_hint {
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unsigned int clu;
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union {
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unsigned int off; /* cluster offset */
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int eidx; /* entry index */
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};
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};
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struct exfat_entry_set_cache {
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/* sector number that contains file_entry */
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sector_t sector;
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/* byte offset in the sector */
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unsigned int offset;
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/* flag in stream entry. 01 for cluster chain, 03 for contig. */
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int alloc_flag;
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unsigned int num_entries;
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struct exfat_dentry entries[];
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};
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struct exfat_dir_entry {
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struct exfat_chain dir;
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int entry;
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unsigned int type;
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unsigned int start_clu;
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unsigned char flags;
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unsigned short attr;
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loff_t size;
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unsigned int num_subdirs;
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struct timespec64 atime;
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struct timespec64 mtime;
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struct timespec64 crtime;
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struct exfat_dentry_namebuf namebuf;
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};
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/*
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* exfat mount in-memory data
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*/
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struct exfat_mount_options {
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kuid_t fs_uid;
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kgid_t fs_gid;
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unsigned short fs_fmask;
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unsigned short fs_dmask;
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/* permission for setting the [am]time */
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unsigned short allow_utime;
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/* charset for filename input/display */
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char *iocharset;
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/* on error: continue, panic, remount-ro */
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enum exfat_error_mode errors;
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unsigned utf8:1, /* Use of UTF-8 character set */
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discard:1; /* Issue discard requests on deletions */
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int time_offset; /* Offset of timestamps from UTC (in minutes) */
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};
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/*
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* EXFAT file system superblock in-memory data
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*/
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struct exfat_sb_info {
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unsigned long long num_sectors; /* num of sectors in volume */
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unsigned int num_clusters; /* num of clusters in volume */
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unsigned int cluster_size; /* cluster size in bytes */
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unsigned int cluster_size_bits;
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unsigned int sect_per_clus; /* cluster size in sectors */
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unsigned int sect_per_clus_bits;
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unsigned long long FAT1_start_sector; /* FAT1 start sector */
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unsigned long long FAT2_start_sector; /* FAT2 start sector */
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unsigned long long data_start_sector; /* data area start sector */
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unsigned int num_FAT_sectors; /* num of FAT sectors */
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unsigned int root_dir; /* root dir cluster */
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unsigned int dentries_per_clu; /* num of dentries per cluster */
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unsigned int vol_flag; /* volume dirty flag */
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struct buffer_head *pbr_bh; /* buffer_head of PBR sector */
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unsigned int map_clu; /* allocation bitmap start cluster */
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unsigned int map_sectors; /* num of allocation bitmap sectors */
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struct buffer_head **vol_amap; /* allocation bitmap */
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unsigned short *vol_utbl; /* upcase table */
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unsigned int clu_srch_ptr; /* cluster search pointer */
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unsigned int used_clusters; /* number of used clusters */
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unsigned long s_state;
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struct mutex s_lock; /* superblock lock */
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struct exfat_mount_options options;
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struct nls_table *nls_io; /* Charset used for input and display */
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struct ratelimit_state ratelimit;
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spinlock_t inode_hash_lock;
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struct hlist_head inode_hashtable[EXFAT_HASH_SIZE];
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struct rcu_head rcu;
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};
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/*
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* EXFAT file system inode in-memory data
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*/
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struct exfat_inode_info {
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struct exfat_chain dir;
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int entry;
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unsigned int type;
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unsigned short attr;
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unsigned int start_clu;
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unsigned char flags;
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/*
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* the copy of low 32bit of i_version to check
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* the validation of hint_stat.
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*/
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unsigned int version;
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/* file offset or dentry index for readdir */
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loff_t rwoffset;
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/* hint for cluster last accessed */
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struct exfat_hint hint_bmap;
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/* hint for entry index we try to lookup next time */
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struct exfat_hint hint_stat;
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/* hint for first empty entry */
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struct exfat_hint_femp hint_femp;
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spinlock_t cache_lru_lock;
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struct list_head cache_lru;
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int nr_caches;
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/* for avoiding the race between alloc and free */
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unsigned int cache_valid_id;
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/*
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* NOTE: i_size_ondisk is 64bits, so must hold ->inode_lock to access.
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* physically allocated size.
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*/
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loff_t i_size_ondisk;
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/* block-aligned i_size (used in cont_write_begin) */
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loff_t i_size_aligned;
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/* on-disk position of directory entry or 0 */
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loff_t i_pos;
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/* hash by i_location */
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struct hlist_node i_hash_fat;
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/* protect bmap against truncate */
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struct rw_semaphore truncate_lock;
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struct inode vfs_inode;
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/* File creation time */
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struct timespec64 i_crtime;
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};
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static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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static inline struct exfat_inode_info *EXFAT_I(struct inode *inode)
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{
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return container_of(inode, struct exfat_inode_info, vfs_inode);
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}
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/*
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* If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to
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* save ATTR_RO instead of ->i_mode.
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*
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* If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only
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* bit, it's just used as flag for app.
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*/
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static inline int exfat_mode_can_hold_ro(struct inode *inode)
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{
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struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
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if (S_ISDIR(inode->i_mode))
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return 0;
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if ((~sbi->options.fs_fmask) & 0222)
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return 1;
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return 0;
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}
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/* Convert attribute bits and a mask to the UNIX mode. */
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static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi,
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unsigned short attr, mode_t mode)
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{
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if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR))
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mode &= ~0222;
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if (attr & ATTR_SUBDIR)
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return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
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return (mode & ~sbi->options.fs_fmask) | S_IFREG;
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}
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/* Return the FAT attribute byte for this inode */
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static inline unsigned short exfat_make_attr(struct inode *inode)
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{
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unsigned short attr = EXFAT_I(inode)->attr;
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if (S_ISDIR(inode->i_mode))
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attr |= ATTR_SUBDIR;
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if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222))
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attr |= ATTR_READONLY;
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return attr;
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}
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static inline void exfat_save_attr(struct inode *inode, unsigned short attr)
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{
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if (exfat_mode_can_hold_ro(inode))
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EXFAT_I(inode)->attr = attr & (ATTR_RWMASK | ATTR_READONLY);
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else
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EXFAT_I(inode)->attr = attr & ATTR_RWMASK;
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}
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static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi,
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sector_t sec)
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{
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return ((sec - sbi->data_start_sector + 1) &
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((1 << sbi->sect_per_clus_bits) - 1)) == 0;
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}
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static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi,
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unsigned int clus)
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{
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return ((clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) +
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sbi->data_start_sector;
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}
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static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi,
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sector_t sec)
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{
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return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) +
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EXFAT_RESERVED_CLUSTERS;
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}
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/* super.c */
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int exfat_set_vol_flags(struct super_block *sb, unsigned short new_flag);
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/* fatent.c */
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#define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu)
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int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
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struct exfat_chain *p_chain);
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int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain);
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int exfat_ent_get(struct super_block *sb, unsigned int loc,
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unsigned int *content);
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int exfat_ent_set(struct super_block *sb, unsigned int loc,
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unsigned int content);
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int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir,
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int entry, struct exfat_dentry *p_entry);
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int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain,
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unsigned int len);
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int exfat_zeroed_cluster(struct inode *dir, unsigned int clu);
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int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain,
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unsigned int *ret_clu);
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int exfat_count_num_clusters(struct super_block *sb,
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struct exfat_chain *p_chain, unsigned int *ret_count);
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/* balloc.c */
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int exfat_load_bitmap(struct super_block *sb);
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void exfat_free_bitmap(struct exfat_sb_info *sbi);
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int exfat_set_bitmap(struct inode *inode, unsigned int clu);
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void exfat_clear_bitmap(struct inode *inode, unsigned int clu);
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unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu);
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int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count);
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/* file.c */
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extern const struct file_operations exfat_file_operations;
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int __exfat_truncate(struct inode *inode, loff_t new_size);
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void exfat_truncate(struct inode *inode, loff_t size);
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int exfat_setattr(struct dentry *dentry, struct iattr *attr);
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int exfat_getattr(const struct path *path, struct kstat *stat,
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unsigned int request_mask, unsigned int query_flags);
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/* namei.c */
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extern const struct dentry_operations exfat_dentry_ops;
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extern const struct dentry_operations exfat_utf8_dentry_ops;
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/* cache.c */
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int exfat_cache_init(void);
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void exfat_cache_shutdown(void);
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void exfat_cache_init_inode(struct inode *inode);
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void exfat_cache_inval_inode(struct inode *inode);
|
||||
int exfat_get_cluster(struct inode *inode, unsigned int cluster,
|
||||
unsigned int *fclus, unsigned int *dclus,
|
||||
unsigned int *last_dclus, int allow_eof);
|
||||
|
||||
/* dir.c */
|
||||
extern const struct inode_operations exfat_dir_inode_operations;
|
||||
extern const struct file_operations exfat_dir_operations;
|
||||
unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry);
|
||||
int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir,
|
||||
int entry, unsigned int type, unsigned int start_clu,
|
||||
unsigned long long size);
|
||||
int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir,
|
||||
int entry, int num_entries, struct exfat_uni_name *p_uniname);
|
||||
int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir,
|
||||
int entry, int order, int num_entries);
|
||||
int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir,
|
||||
int entry);
|
||||
int exfat_update_dir_chksum_with_entry_set(struct super_block *sb,
|
||||
struct exfat_entry_set_cache *es, int sync);
|
||||
int exfat_calc_num_entries(struct exfat_uni_name *p_uniname);
|
||||
int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei,
|
||||
struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
|
||||
int num_entries, unsigned int type);
|
||||
int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu);
|
||||
int exfat_find_location(struct super_block *sb, struct exfat_chain *p_dir,
|
||||
int entry, sector_t *sector, int *offset);
|
||||
struct exfat_dentry *exfat_get_dentry(struct super_block *sb,
|
||||
struct exfat_chain *p_dir, int entry, struct buffer_head **bh,
|
||||
sector_t *sector);
|
||||
struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
|
||||
struct exfat_chain *p_dir, int entry, unsigned int type,
|
||||
struct exfat_dentry **file_ep);
|
||||
int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir);
|
||||
|
||||
/* inode.c */
|
||||
extern const struct inode_operations exfat_file_inode_operations;
|
||||
void exfat_sync_inode(struct inode *inode);
|
||||
struct inode *exfat_build_inode(struct super_block *sb,
|
||||
struct exfat_dir_entry *info, loff_t i_pos);
|
||||
void exfat_hash_inode(struct inode *inode, loff_t i_pos);
|
||||
void exfat_unhash_inode(struct inode *inode);
|
||||
struct inode *exfat_iget(struct super_block *sb, loff_t i_pos);
|
||||
int exfat_write_inode(struct inode *inode, struct writeback_control *wbc);
|
||||
void exfat_evict_inode(struct inode *inode);
|
||||
int exfat_block_truncate_page(struct inode *inode, loff_t from);
|
||||
|
||||
/* exfat/nls.c */
|
||||
unsigned short exfat_toupper(struct super_block *sb, unsigned short a);
|
||||
int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a,
|
||||
unsigned short *b, unsigned int len);
|
||||
int exfat_utf16_to_nls(struct super_block *sb,
|
||||
struct exfat_uni_name *uniname, unsigned char *p_cstring,
|
||||
int len);
|
||||
int exfat_nls_to_utf16(struct super_block *sb,
|
||||
const unsigned char *p_cstring, const int len,
|
||||
struct exfat_uni_name *uniname, int *p_lossy);
|
||||
int exfat_create_upcase_table(struct super_block *sb);
|
||||
void exfat_free_upcase_table(struct exfat_sb_info *sbi);
|
||||
unsigned short exfat_high_surrogate(unicode_t u);
|
||||
unsigned short exfat_low_surrogate(unicode_t u);
|
||||
|
||||
/* exfat/misc.c */
|
||||
void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
|
||||
__printf(3, 4) __cold;
|
||||
#define exfat_fs_error(sb, fmt, args...) \
|
||||
__exfat_fs_error(sb, 1, fmt, ## args)
|
||||
#define exfat_fs_error_ratelimit(sb, fmt, args...) \
|
||||
__exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \
|
||||
fmt, ## args)
|
||||
void exfat_msg(struct super_block *sb, const char *lv, const char *fmt, ...)
|
||||
__printf(3, 4) __cold;
|
||||
void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
|
||||
u8 tz, __le16 time, __le16 date, u8 time_ms);
|
||||
void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
|
||||
u8 *tz, __le16 *time, __le16 *date, u8 *time_ms);
|
||||
unsigned short exfat_calc_chksum_2byte(void *data, int len,
|
||||
unsigned short chksum, int type);
|
||||
void exfat_update_bh(struct super_block *sb, struct buffer_head *bh, int sync);
|
||||
void exfat_chain_set(struct exfat_chain *ec, unsigned int dir,
|
||||
unsigned int size, unsigned char flags);
|
||||
void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec);
|
||||
|
||||
#endif /* !_EXFAT_FS_H */
|
||||
|
|
@ -0,0 +1,184 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||||
/*
|
||||
* Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
|
||||
*/
|
||||
|
||||
#ifndef _EXFAT_RAW_H
|
||||
#define _EXFAT_RAW_H
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
#define PBR_SIGNATURE 0xAA55
|
||||
|
||||
#define EXFAT_MAX_FILE_LEN 255
|
||||
|
||||
#define VOL_CLEAN 0x0000
|
||||
#define VOL_DIRTY 0x0002
|
||||
|
||||
#define EXFAT_EOF_CLUSTER 0xFFFFFFFFu
|
||||
#define EXFAT_BAD_CLUSTER 0xFFFFFFF7u
|
||||
#define EXFAT_FREE_CLUSTER 0
|
||||
/* Cluster 0, 1 are reserved, the first cluster is 2 in the cluster heap. */
|
||||
#define EXFAT_RESERVED_CLUSTERS 2
|
||||
#define EXFAT_FIRST_CLUSTER 2
|
||||
#define EXFAT_DATA_CLUSTER_COUNT(sbi) \
|
||||
((sbi)->num_clusters - EXFAT_RESERVED_CLUSTERS)
|
||||
|
||||
/* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */
|
||||
#define ALLOC_FAT_CHAIN 0x01
|
||||
#define ALLOC_NO_FAT_CHAIN 0x03
|
||||
|
||||
#define DENTRY_SIZE 32 /* directory entry size */
|
||||
#define DENTRY_SIZE_BITS 5
|
||||
/* exFAT allows 8388608(256MB) directory entries */
|
||||
#define MAX_EXFAT_DENTRIES 8388608
|
||||
|
||||
/* dentry types */
|
||||
#define EXFAT_UNUSED 0x00 /* end of directory */
|
||||
#define EXFAT_DELETE (~0x80)
|
||||
#define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */
|
||||
#define EXFAT_INVAL 0x80 /* invalid value */
|
||||
#define EXFAT_BITMAP 0x81 /* allocation bitmap */
|
||||
#define EXFAT_UPCASE 0x82 /* upcase table */
|
||||
#define EXFAT_VOLUME 0x83 /* volume label */
|
||||
#define EXFAT_FILE 0x85 /* file or dir */
|
||||
#define EXFAT_GUID 0xA0
|
||||
#define EXFAT_PADDING 0xA1
|
||||
#define EXFAT_ACLTAB 0xA2
|
||||
#define EXFAT_STREAM 0xC0 /* stream entry */
|
||||
#define EXFAT_NAME 0xC1 /* file name entry */
|
||||
#define EXFAT_ACL 0xC2 /* stream entry */
|
||||
|
||||
#define IS_EXFAT_CRITICAL_PRI(x) (x < 0xA0)
|
||||
#define IS_EXFAT_BENIGN_PRI(x) (x < 0xC0)
|
||||
#define IS_EXFAT_CRITICAL_SEC(x) (x < 0xE0)
|
||||
|
||||
/* checksum types */
|
||||
#define CS_DIR_ENTRY 0
|
||||
#define CS_PBR_SECTOR 1
|
||||
#define CS_DEFAULT 2
|
||||
|
||||
/* file attributes */
|
||||
#define ATTR_READONLY 0x0001
|
||||
#define ATTR_HIDDEN 0x0002
|
||||
#define ATTR_SYSTEM 0x0004
|
||||
#define ATTR_VOLUME 0x0008
|
||||
#define ATTR_SUBDIR 0x0010
|
||||
#define ATTR_ARCHIVE 0x0020
|
||||
|
||||
#define ATTR_RWMASK (ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \
|
||||
ATTR_SUBDIR | ATTR_ARCHIVE)
|
||||
|
||||
#define PBR64_JUMP_BOOT_LEN 3
|
||||
#define PBR64_OEM_NAME_LEN 8
|
||||
#define PBR64_RESERVED_LEN 53
|
||||
|
||||
#define EXFAT_FILE_NAME_LEN 15
|
||||
|
||||
/* EXFAT BIOS parameter block (64 bytes) */
|
||||
struct bpb64 {
|
||||
__u8 jmp_boot[PBR64_JUMP_BOOT_LEN];
|
||||
__u8 oem_name[PBR64_OEM_NAME_LEN];
|
||||
__u8 res_zero[PBR64_RESERVED_LEN];
|
||||
} __packed;
|
||||
|
||||
/* EXFAT EXTEND BIOS parameter block (56 bytes) */
|
||||
struct bsx64 {
|
||||
__le64 vol_offset;
|
||||
__le64 vol_length;
|
||||
__le32 fat_offset;
|
||||
__le32 fat_length;
|
||||
__le32 clu_offset;
|
||||
__le32 clu_count;
|
||||
__le32 root_cluster;
|
||||
__le32 vol_serial;
|
||||
__u8 fs_version[2];
|
||||
__le16 vol_flags;
|
||||
__u8 sect_size_bits;
|
||||
__u8 sect_per_clus_bits;
|
||||
__u8 num_fats;
|
||||
__u8 phy_drv_no;
|
||||
__u8 perc_in_use;
|
||||
__u8 reserved2[7];
|
||||
} __packed;
|
||||
|
||||
/* EXFAT PBR[BPB+BSX] (120 bytes) */
|
||||
struct pbr64 {
|
||||
struct bpb64 bpb;
|
||||
struct bsx64 bsx;
|
||||
} __packed;
|
||||
|
||||
/* Common PBR[Partition Boot Record] (512 bytes) */
|
||||
struct pbr {
|
||||
union {
|
||||
__u8 raw[64];
|
||||
struct bpb64 f64;
|
||||
} bpb;
|
||||
union {
|
||||
__u8 raw[56];
|
||||
struct bsx64 f64;
|
||||
} bsx;
|
||||
__u8 boot_code[390];
|
||||
__le16 signature;
|
||||
} __packed;
|
||||
|
||||
struct exfat_dentry {
|
||||
__u8 type;
|
||||
union {
|
||||
struct {
|
||||
__u8 num_ext;
|
||||
__le16 checksum;
|
||||
__le16 attr;
|
||||
__le16 reserved1;
|
||||
__le16 create_time;
|
||||
__le16 create_date;
|
||||
__le16 modify_time;
|
||||
__le16 modify_date;
|
||||
__le16 access_time;
|
||||
__le16 access_date;
|
||||
__u8 create_time_ms;
|
||||
__u8 modify_time_ms;
|
||||
__u8 create_tz;
|
||||
__u8 modify_tz;
|
||||
__u8 access_tz;
|
||||
__u8 reserved2[7];
|
||||
} __packed file; /* file directory entry */
|
||||
struct {
|
||||
__u8 flags;
|
||||
__u8 reserved1;
|
||||
__u8 name_len;
|
||||
__le16 name_hash;
|
||||
__le16 reserved2;
|
||||
__le64 valid_size;
|
||||
__le32 reserved3;
|
||||
__le32 start_clu;
|
||||
__le64 size;
|
||||
} __packed stream; /* stream extension directory entry */
|
||||
struct {
|
||||
__u8 flags;
|
||||
__le16 unicode_0_14[EXFAT_FILE_NAME_LEN];
|
||||
} __packed name; /* file name directory entry */
|
||||
struct {
|
||||
__u8 flags;
|
||||
__u8 reserved[18];
|
||||
__le32 start_clu;
|
||||
__le64 size;
|
||||
} __packed bitmap; /* allocation bitmap directory entry */
|
||||
struct {
|
||||
__u8 reserved1[3];
|
||||
__le32 checksum;
|
||||
__u8 reserved2[12];
|
||||
__le32 start_clu;
|
||||
__le64 size;
|
||||
} __packed upcase; /* up-case table directory entry */
|
||||
} __packed dentry;
|
||||
} __packed;
|
||||
|
||||
#define EXFAT_TZ_VALID (1 << 7)
|
||||
|
||||
/* Jan 1 GMT 00:00:00 1980 */
|
||||
#define EXFAT_MIN_TIMESTAMP_SECS 315532800LL
|
||||
/* Dec 31 GMT 23:59:59 2107 */
|
||||
#define EXFAT_MAX_TIMESTAMP_SECS 4354819199LL
|
||||
|
||||
#endif /* !_EXFAT_RAW_H */
|
||||
Loading…
Reference in New Issue