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- /* 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 BOOT_SIGNATURE 0xAA55
- #define EXBOOT_SIGNATURE 0xAA550000
- #define STR_EXFAT "EXFAT " /* size should be 8 */
- #define EXFAT_MAX_FILE_LEN 255
- #define VOLUME_DIRTY 0x0002
- #define MEDIA_FAILURE 0x0004
- #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_BOOT_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 BOOTSEC_JUMP_BOOT_LEN 3
- #define BOOTSEC_FS_NAME_LEN 8
- #define BOOTSEC_OLDBPB_LEN 53
- #define EXFAT_FILE_NAME_LEN 15
- #define EXFAT_MIN_SECT_SIZE_BITS 9
- #define EXFAT_MAX_SECT_SIZE_BITS 12
- #define EXFAT_MAX_SECT_PER_CLUS_BITS(x) (25 - (x)->sect_size_bits)
- /* EXFAT: Main and Backup Boot Sector (512 bytes) */
- struct boot_sector {
- __u8 jmp_boot[BOOTSEC_JUMP_BOOT_LEN];
- __u8 fs_name[BOOTSEC_FS_NAME_LEN];
- __u8 must_be_zero[BOOTSEC_OLDBPB_LEN];
- __le64 partition_offset;
- __le64 vol_length;
- __le32 fat_offset;
- __le32 fat_length;
- __le32 clu_offset;
- __le32 clu_count;
- __le32 root_cluster;
- __le32 vol_serial;
- __u8 fs_revision[2];
- __le16 vol_flags;
- __u8 sect_size_bits;
- __u8 sect_per_clus_bits;
- __u8 num_fats;
- __u8 drv_sel;
- __u8 percent_in_use;
- __u8 reserved[7];
- __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_cs;
- __u8 modify_time_cs;
- __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 */
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