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#ifndef _LINUX_MSDOS_FS_H
#define _LINUX_MSDOS_FS_H
#include <linux/types.h>
#include <linux/magic.h>
#include <asm/byteorder.h>
#define SECTOR_SIZE 512
#define SECTOR_BITS 9
#define MSDOS_DPB (MSDOS_DPS)
#define MSDOS_DPB_BITS 4
#define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry))
#define MSDOS_DPS_BITS 4
#define MSDOS_LONGNAME 256
#define CF_LE_W(v) le16_to_cpu(v)
#define CF_LE_L(v) le32_to_cpu(v)
#define CT_LE_W(v) cpu_to_le16(v)
#define CT_LE_L(v) cpu_to_le32(v)
#define MSDOS_ROOT_INO 1
#define MSDOS_DIR_BITS 5
#define FAT_MAX_DIR_ENTRIES (65536)
#define FAT_MAX_DIR_SIZE (FAT_MAX_DIR_ENTRIES << MSDOS_DIR_BITS)
#define ATTR_NONE 0
#define ATTR_RO 1
#define ATTR_HIDDEN 2
#define ATTR_SYS 4
#define ATTR_VOLUME 8
#define ATTR_DIR 16
#define ATTR_ARCH 32
#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
#define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
#define CASE_LOWER_BASE 8
#define CASE_LOWER_EXT 16
#define DELETED_FLAG 0xe5
#define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG)
#define FAT_LFN_LEN 255
#define MSDOS_NAME 11
#define MSDOS_SLOTS 21
#define MSDOS_DOT ". "
#define MSDOS_DOTDOT ".. "
#define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 : \
MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x))
#define FAT_START_ENT 2
#define MAX_FAT12 0xFF4
#define MAX_FAT16 0xFFF4
#define MAX_FAT32 0x0FFFFFF6
#define MAX_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? MAX_FAT32 : \
MSDOS_SB(s)->fat_bits == 16 ? MAX_FAT16 : MAX_FAT12)
#define BAD_FAT12 0xFF7
#define BAD_FAT16 0xFFF7
#define BAD_FAT32 0x0FFFFFF7
#define EOF_FAT12 0xFFF
#define EOF_FAT16 0xFFFF
#define EOF_FAT32 0x0FFFFFFF
#define FAT_ENT_FREE (0)
#define FAT_ENT_BAD (BAD_FAT32)
#define FAT_ENT_EOF (EOF_FAT32)
#define FAT_FSINFO_SIG1 0x41615252
#define FAT_FSINFO_SIG2 0x61417272
#define IS_FSINFO(x) (le32_to_cpu((x)->signature1) == FAT_FSINFO_SIG1 \
&& le32_to_cpu((x)->signature2) == FAT_FSINFO_SIG2)
struct __fat_dirent {
long d_ino;
__kernel_off_t d_off;
unsigned short d_reclen;
char d_name[256];
};
#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct __fat_dirent[2])
#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct __fat_dirent[2])
#define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32)
#define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32)
#define VFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32)
struct fat_boot_sector {
__u8 ignored[3];
__u8 system_id[8];
__u8 sector_size[2];
__u8 sec_per_clus;
__le16 reserved;
__u8 fats;
__u8 dir_entries[2];
__u8 sectors[2];
__u8 media;
__le16 fat_length;
__le16 secs_track;
__le16 heads;
__le32 hidden;
__le32 total_sect;
__le32 fat32_length;
__le16 flags;
__u8 version[2];
__le32 root_cluster;
__le16 info_sector;
__le16 backup_boot;
__le16 reserved2[6];
};
struct fat_boot_fsinfo {
__le32 signature1;
__le32 reserved1[120];
__le32 signature2;
__le32 free_clusters;
__le32 next_cluster;
__le32 reserved2[4];
};
struct fat_boot_bsx {
__u8 drive;
__u8 reserved1;
__u8 signature;
__u8 vol_id[4];
__u8 vol_label[11];
__u8 type[8];
};
#define FAT16_BSX_OFFSET 36
#define FAT32_BSX_OFFSET 64
struct msdos_dir_entry {
__u8 name[MSDOS_NAME];
__u8 attr;
__u8 lcase;
__u8 ctime_cs;
__le16 ctime;
__le16 cdate;
__le16 adate;
__le16 starthi;
__le16 time,date,start;
__le32 size;
};
struct msdos_dir_slot {
__u8 id;
__u8 name0_4[10];
__u8 attr;
__u8 reserved;
__u8 alias_checksum;
__u8 name5_10[12];
__le16 start;
__u8 name11_12[4];
};
#ifdef __KERNEL__
static inline int fat_valid_media(u8 media)
{
return 0xf8 <= media || media == 0xf0;
}
#endif
#endif
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