diff options
Diffstat (limited to 'include/linux/msdos_fs.h')
| -rw-r--r-- | include/linux/msdos_fs.h | 165 |
1 files changed, 1 insertions, 164 deletions
diff --git a/include/linux/msdos_fs.h b/include/linux/msdos_fs.h index 11cc2ac..e1b163f9 100644 --- a/include/linux/msdos_fs.h +++ b/include/linux/msdos_fs.h @@ -1,174 +1,11 @@ #ifndef _LINUX_MSDOS_FS_H #define _LINUX_MSDOS_FS_H -#include <linux/types.h> -#include <linux/magic.h> -#include <asm/byteorder.h> +#include <uapi/linux/msdos_fs.h> -/* - * The MS-DOS filesystem constants/structures - */ - -#define SECTOR_SIZE 512 /* sector size (bytes) */ -#define SECTOR_BITS 9 /* log2(SECTOR_SIZE) */ -#define MSDOS_DPB (MSDOS_DPS) /* dir entries per block */ -#define MSDOS_DPB_BITS 4 /* log2(MSDOS_DPB) */ -#define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry)) -#define MSDOS_DPS_BITS 4 /* log2(MSDOS_DPS) */ -#define MSDOS_LONGNAME 256 /* maximum name length */ -#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 /* The root inode number */ -#define MSDOS_FSINFO_INO 2 /* Used for managing the FSINFO block */ - -#define MSDOS_DIR_BITS 5 /* log2(sizeof(struct msdos_dir_entry)) */ - -/* directory limit */ -#define FAT_MAX_DIR_ENTRIES (65536) -#define FAT_MAX_DIR_SIZE (FAT_MAX_DIR_ENTRIES << MSDOS_DIR_BITS) - -#define ATTR_NONE 0 /* no attribute bits */ -#define ATTR_RO 1 /* read-only */ -#define ATTR_HIDDEN 2 /* hidden */ -#define ATTR_SYS 4 /* system */ -#define ATTR_VOLUME 8 /* volume label */ -#define ATTR_DIR 16 /* directory */ -#define ATTR_ARCH 32 /* archived */ - -/* attribute bits that are copied "as is" */ -#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN) -/* bits that are used by the Windows 95/Windows NT extended FAT */ -#define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME) - -#define CASE_LOWER_BASE 8 /* base is lower case */ -#define CASE_LOWER_EXT 16 /* extension is lower case */ - -#define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */ -#define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG) - -#define FAT_LFN_LEN 255 /* maximum long name length */ -#define MSDOS_NAME 11 /* maximum name length */ -#define MSDOS_SLOTS 21 /* max # of slots for short and long names */ -#define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */ -#define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */ - -#define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 : \ - MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x)) - -/* start of data cluster's entry (number of reserved clusters) */ -#define FAT_START_ENT 2 - -/* maximum number of clusters */ -#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) - -/* bad cluster mark */ -#define BAD_FAT12 0xFF7 -#define BAD_FAT16 0xFFF7 -#define BAD_FAT32 0x0FFFFFF7 - -/* standard EOF */ -#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]; /* We must not include limits.h! */ -}; - -/* - * ioctl commands - */ -#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct __fat_dirent[2]) -#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct __fat_dirent[2]) -/* <linux/videotext.h> has used 0x72 ('r') in collision, so skip a few */ -#define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32) -#define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32) - -struct fat_boot_sector { - __u8 ignored[3]; /* Boot strap short or near jump */ - __u8 system_id[8]; /* Name - can be used to special case - partition manager volumes */ - __u8 sector_size[2]; /* bytes per logical sector */ - __u8 sec_per_clus; /* sectors/cluster */ - __le16 reserved; /* reserved sectors */ - __u8 fats; /* number of FATs */ - __u8 dir_entries[2]; /* root directory entries */ - __u8 sectors[2]; /* number of sectors */ - __u8 media; /* media code */ - __le16 fat_length; /* sectors/FAT */ - __le16 secs_track; /* sectors per track */ - __le16 heads; /* number of heads */ - __le32 hidden; /* hidden sectors (unused) */ - __le32 total_sect; /* number of sectors (if sectors == 0) */ - - /* The following fields are only used by FAT32 */ - __le32 fat32_length; /* sectors/FAT */ - __le16 flags; /* bit 8: fat mirroring, low 4: active fat */ - __u8 version[2]; /* major, minor filesystem version */ - __le32 root_cluster; /* first cluster in root directory */ - __le16 info_sector; /* filesystem info sector */ - __le16 backup_boot; /* backup boot sector */ - __le16 reserved2[6]; /* Unused */ -}; - -struct fat_boot_fsinfo { - __le32 signature1; /* 0x41615252L */ - __le32 reserved1[120]; /* Nothing as far as I can tell */ - __le32 signature2; /* 0x61417272L */ - __le32 free_clusters; /* Free cluster count. -1 if unknown */ - __le32 next_cluster; /* Most recently allocated cluster */ - __le32 reserved2[4]; -}; - -struct msdos_dir_entry { - __u8 name[MSDOS_NAME];/* name and extension */ - __u8 attr; /* attribute bits */ - __u8 lcase; /* Case for base and extension */ - __u8 ctime_cs; /* Creation time, centiseconds (0-199) */ - __le16 ctime; /* Creation time */ - __le16 cdate; /* Creation date */ - __le16 adate; /* Last access date */ - __le16 starthi; /* High 16 bits of cluster in FAT32 */ - __le16 time,date,start;/* time, date and first cluster */ - __le32 size; /* file size (in bytes) */ -}; - -/* Up to 13 characters of the name */ -struct msdos_dir_slot { - __u8 id; /* sequence number for slot */ - __u8 name0_4[10]; /* first 5 characters in name */ - __u8 attr; /* attribute byte */ - __u8 reserved; /* always 0 */ - __u8 alias_checksum; /* checksum for 8.3 alias */ - __u8 name5_10[12]; /* 6 more characters in name */ - __le16 start; /* starting cluster number, 0 in long slots */ - __u8 name11_12[4]; /* last 2 characters in name */ -}; - -#ifdef __KERNEL__ /* media of boot sector */ static inline int fat_valid_media(u8 media) { return 0xf8 <= media || media == 0xf0; } -#endif /* !__KERNEL__ */ #endif /* !_LINUX_MSDOS_FS_H */ |
