| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * Copyright (C) 2019 Namjae Jeon <linkinjeon@kernel.org> |
| */ |
| |
| #ifndef _EXFAT_H |
| #define _EXFAT_H |
| |
| #include <stdint.h> |
| #include <linux/fs.h> |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #ifdef WORDS_BIGENDIAN |
| #define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)) |
| #define cpu_to_le32(x) \ |
| ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \ |
| (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24)) |
| #define cpu_to_le64(x) (cpu_to_le32((uint64_t)(x)) << 32 | \ |
| cpu_to_le32((uint64_t)(x) >> 32)) |
| #else |
| #define cpu_to_le16(x) (x) |
| #define cpu_to_le32(x) (x) |
| #define cpu_to_le64(x) (x) |
| #endif |
| |
| #define le64_to_cpu(x) ((uint64_t)cpu_to_le64(x)) |
| #define le32_to_cpu(x) ((uint32_t)cpu_to_le32(x)) |
| #define le16_to_cpu(x) ((uint16_t)cpu_to_le16(x)) |
| |
| #define PBR_SIGNATURE 0xAA55 |
| |
| #define VOL_CLEAN 0x0000 |
| #define VOL_DIRTY 0x0002 |
| |
| #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 MSDOS_DELETED 0xE5 /* deleted mark */ |
| #define MSDOS_UNUSED 0x00 /* end of directory */ |
| |
| #define EXFAT_LAST 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 */ |
| |
| /* 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_EXTEND (ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM | \ |
| ATTR_VOLUME) /* 0x000F */ |
| |
| #define ATTR_EXTEND_MASK (ATTR_EXTEND | ATTR_SUBDIR | ATTR_ARCHIVE) |
| #define ATTR_RWMASK (ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \ |
| ATTR_SUBDIR | ATTR_ARCHIVE) |
| |
| #define ATTR_READONLY_LE cpu_to_le16(0x0001) |
| #define ATTR_HIDDEN_LE cpu_to_le16(0x0002) |
| #define ATTR_SYSTEM_LE cpu_to_le16(0x0004) |
| #define ATTR_VOLUME_LE cpu_to_le16(0x0008) |
| #define ATTR_SUBDIR_LE cpu_to_le16(0x0010) |
| #define ATTR_ARCHIVE_LE cpu_to_le16(0x0020) |
| |
| /* stream flags */ |
| #define EXFAT_SF_CONTIGUOUS 0x02 |
| |
| #define CLUSTER_32(x) ((unsigned int)((x) & 0xFFFFFFFFU)) |
| #define EXFAT_EOF_CLUSTER CLUSTER_32(~0) |
| #define EXFAT_BAD_CLUSTER (0xFFFFFFF7U) |
| #define EXFAT_FREE_CLUSTER (0) |
| #define EXFAT_FIRST_CLUSTER (2) |
| #define EXFAT_RESERVED_CLUSTERS (2) |
| |
| |
| /* EXFAT BIOS parameter block (64 bytes) */ |
| struct bpb64 { |
| __u8 jmp_boot[3]; |
| __u8 oem_name[8]; |
| __u8 res_zero[53]; |
| }; |
| |
| /* 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]; |
| }; |
| |
| /* Common PBR[Partition Boot Record] (512 bytes) */ |
| struct pbr { |
| struct bpb64 bpb; |
| struct bsx64 bsx; |
| __u8 boot_code[390]; |
| __le16 signature; |
| }; |
| |
| /* Extended Boot Sector */ |
| struct exbs { |
| __u8 zero[510]; |
| __le16 signature; |
| }; |
| |
| /* Extended Boot Record (8 sectors) */ |
| struct expbr { |
| struct exbs eb[8]; |
| }; |
| |
| #define VOLUME_LABEL_MAX_LEN 11 |
| #define ENTRY_NAME_MAX 15 |
| |
| struct exfat_dentry { |
| __u8 type; |
| union { |
| struct { |
| __u8 character_count; |
| __le16 volume_label[VOLUME_LABEL_MAX_LEN]; |
| __u8 reserved[8]; |
| } __attribute__((packed)) vol; /* file directory entry */ |
| |
| 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 access_time_ms; |
| __u8 reserved2[9]; |
| } __attribute__((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; |
| } __attribute__((packed)) stream; /* stream extension directory entry */ |
| struct { |
| __u8 flags; |
| __le16 unicode_0_14[15]; |
| } __attribute__((packed)) name; /* file name directory entry */ |
| struct { |
| __u8 flags; |
| __u8 reserved[18]; |
| __le32 start_clu; |
| __le64 size; |
| } __attribute__((packed)) bitmap; /* allocation bitmap directory entry */ |
| struct { |
| __u8 reserved1[3]; |
| __le32 checksum; |
| __u8 reserved2[12]; |
| __le32 start_clu; |
| __le64 size; |
| } __attribute__((packed)) upcase; /* up-case table directory entry */ |
| } __attribute__((packed)) dentry; |
| } __attribute__((packed)); |
| |
| #define vol_char_cnt dentry.vol.character_count |
| #define vol_label dentry.vol.volume_label |
| #define file_num_ext dentry.file.num_ext |
| #define file_checksum dentry.file.checksum |
| #define file_attr dentry.file.attr |
| #define file_create_time dentry.file.create_time |
| #define file_create_date dentry.file.create_date |
| #define file_modify_time dentry.file.modify_time |
| #define file_modify_date dentry.file.modify_date |
| #define file_access_time dentry.file.access_time |
| #define file_access_date dentry.file.access_date |
| #define file_create_time_ms dentry.file.create_time_ms |
| #define file_modify_time_ms dentry.file.modify_time_ms |
| #define file_access_time_ms dentry.file.access_time_ms |
| #define stream_flags dentry.stream.flags |
| #define stream_name_len dentry.stream.name_len |
| #define stream_name_hash dentry.stream.name_hash |
| #define stream_start_clu dentry.stream.start_clu |
| #define stream_valid_size dentry.stream.valid_size |
| #define stream_size dentry.stream.size |
| #define name_flags dentry.name.flags |
| #define name_unicode dentry.name.unicode_0_14 |
| #define bitmap_flags dentry.bitmap.flags |
| #define bitmap_start_clu dentry.bitmap.start_clu |
| #define bitmap_size dentry.bitmap.size |
| #define upcase_start_clu dentry.upcase.start_clu |
| #define upcase_size dentry.upcase.size |
| #define upcase_checksum dentry.upcase.checksum |
| |
| #endif /* !_EXFAT_H */ |