/* 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 */