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168 lines
4.3 KiB
168 lines
4.3 KiB
/* 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_RAW_H |
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#define _EXFAT_RAW_H |
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#include <linux/types.h> |
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#define BOOT_SIGNATURE 0xAA55 |
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#define EXBOOT_SIGNATURE 0xAA550000 |
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#define STR_EXFAT "EXFAT " /* size should be 8 */ |
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#define EXFAT_MAX_FILE_LEN 255 |
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#define VOLUME_DIRTY 0x0002 |
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#define MEDIA_FAILURE 0x0004 |
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#define EXFAT_EOF_CLUSTER 0xFFFFFFFFu |
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#define EXFAT_BAD_CLUSTER 0xFFFFFFF7u |
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#define EXFAT_FREE_CLUSTER 0 |
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/* Cluster 0, 1 are reserved, the first cluster is 2 in the cluster heap. */ |
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#define EXFAT_RESERVED_CLUSTERS 2 |
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#define EXFAT_FIRST_CLUSTER 2 |
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#define EXFAT_DATA_CLUSTER_COUNT(sbi) \ |
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((sbi)->num_clusters - EXFAT_RESERVED_CLUSTERS) |
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/* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */ |
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#define ALLOC_FAT_CHAIN 0x01 |
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#define ALLOC_NO_FAT_CHAIN 0x03 |
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#define DENTRY_SIZE 32 /* directory entry size */ |
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#define DENTRY_SIZE_BITS 5 |
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/* exFAT allows 8388608(256MB) directory entries */ |
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#define MAX_EXFAT_DENTRIES 8388608 |
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/* dentry types */ |
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#define EXFAT_UNUSED 0x00 /* end of directory */ |
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#define EXFAT_DELETE (~0x80) |
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#define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */ |
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#define EXFAT_INVAL 0x80 /* invalid value */ |
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#define EXFAT_BITMAP 0x81 /* allocation bitmap */ |
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#define EXFAT_UPCASE 0x82 /* upcase table */ |
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#define EXFAT_VOLUME 0x83 /* volume label */ |
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#define EXFAT_FILE 0x85 /* file or dir */ |
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#define EXFAT_GUID 0xA0 |
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#define EXFAT_PADDING 0xA1 |
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#define EXFAT_ACLTAB 0xA2 |
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#define EXFAT_STREAM 0xC0 /* stream entry */ |
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#define EXFAT_NAME 0xC1 /* file name entry */ |
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#define EXFAT_ACL 0xC2 /* stream entry */ |
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#define IS_EXFAT_CRITICAL_PRI(x) (x < 0xA0) |
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#define IS_EXFAT_BENIGN_PRI(x) (x < 0xC0) |
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#define IS_EXFAT_CRITICAL_SEC(x) (x < 0xE0) |
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/* checksum types */ |
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#define CS_DIR_ENTRY 0 |
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#define CS_BOOT_SECTOR 1 |
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#define CS_DEFAULT 2 |
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/* file attributes */ |
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#define ATTR_READONLY 0x0001 |
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#define ATTR_HIDDEN 0x0002 |
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#define ATTR_SYSTEM 0x0004 |
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#define ATTR_VOLUME 0x0008 |
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#define ATTR_SUBDIR 0x0010 |
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#define ATTR_ARCHIVE 0x0020 |
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#define ATTR_RWMASK (ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \ |
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ATTR_SUBDIR | ATTR_ARCHIVE) |
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#define BOOTSEC_JUMP_BOOT_LEN 3 |
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#define BOOTSEC_FS_NAME_LEN 8 |
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#define BOOTSEC_OLDBPB_LEN 53 |
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#define EXFAT_FILE_NAME_LEN 15 |
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#define EXFAT_MIN_SECT_SIZE_BITS 9 |
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#define EXFAT_MAX_SECT_SIZE_BITS 12 |
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#define EXFAT_MAX_SECT_PER_CLUS_BITS(x) (25 - (x)->sect_size_bits) |
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/* EXFAT: Main and Backup Boot Sector (512 bytes) */ |
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struct boot_sector { |
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__u8 jmp_boot[BOOTSEC_JUMP_BOOT_LEN]; |
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__u8 fs_name[BOOTSEC_FS_NAME_LEN]; |
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__u8 must_be_zero[BOOTSEC_OLDBPB_LEN]; |
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__le64 partition_offset; |
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__le64 vol_length; |
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__le32 fat_offset; |
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__le32 fat_length; |
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__le32 clu_offset; |
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__le32 clu_count; |
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__le32 root_cluster; |
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__le32 vol_serial; |
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__u8 fs_revision[2]; |
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__le16 vol_flags; |
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__u8 sect_size_bits; |
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__u8 sect_per_clus_bits; |
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__u8 num_fats; |
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__u8 drv_sel; |
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__u8 percent_in_use; |
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__u8 reserved[7]; |
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__u8 boot_code[390]; |
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__le16 signature; |
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} __packed; |
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struct exfat_dentry { |
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__u8 type; |
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union { |
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struct { |
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__u8 num_ext; |
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__le16 checksum; |
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__le16 attr; |
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__le16 reserved1; |
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__le16 create_time; |
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__le16 create_date; |
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__le16 modify_time; |
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__le16 modify_date; |
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__le16 access_time; |
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__le16 access_date; |
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__u8 create_time_cs; |
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__u8 modify_time_cs; |
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__u8 create_tz; |
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__u8 modify_tz; |
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__u8 access_tz; |
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__u8 reserved2[7]; |
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} __packed file; /* file directory entry */ |
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struct { |
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__u8 flags; |
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__u8 reserved1; |
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__u8 name_len; |
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__le16 name_hash; |
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__le16 reserved2; |
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__le64 valid_size; |
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__le32 reserved3; |
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__le32 start_clu; |
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__le64 size; |
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} __packed stream; /* stream extension directory entry */ |
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struct { |
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__u8 flags; |
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__le16 unicode_0_14[EXFAT_FILE_NAME_LEN]; |
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} __packed name; /* file name directory entry */ |
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struct { |
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__u8 flags; |
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__u8 reserved[18]; |
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__le32 start_clu; |
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__le64 size; |
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} __packed bitmap; /* allocation bitmap directory entry */ |
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struct { |
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__u8 reserved1[3]; |
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__le32 checksum; |
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__u8 reserved2[12]; |
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__le32 start_clu; |
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__le64 size; |
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} __packed upcase; /* up-case table directory entry */ |
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} __packed dentry; |
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} __packed; |
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#define EXFAT_TZ_VALID (1 << 7) |
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/* Jan 1 GMT 00:00:00 1980 */ |
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#define EXFAT_MIN_TIMESTAMP_SECS 315532800LL |
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/* Dec 31 GMT 23:59:59 2107 */ |
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#define EXFAT_MAX_TIMESTAMP_SECS 4354819199LL |
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#endif /* !_EXFAT_RAW_H */
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