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1633 |
jcastillo |
#ifndef _LINUX_MSDOS_FS_H
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#define _LINUX_MSDOS_FS_H
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/*
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* The MS-DOS filesystem constants/structures
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*/
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#include <linux/fs.h>
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#include <linux/stat.h>
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#include <linux/fd.h>
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#include <asm/byteorder.h>
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#define MSDOS_ROOT_INO 1 /* == MINIX_ROOT_INO */
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#define SECTOR_SIZE 512 /* sector size (bytes) */
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#define SECTOR_BITS 9 /* log2(SECTOR_SIZE) */
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#define MSDOS_DPB (MSDOS_DPS) /* dir entries per block */
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#define MSDOS_DPB_BITS 4 /* log2(MSDOS_DPB) */
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#define MSDOS_DPS (SECTOR_SIZE/sizeof(struct msdos_dir_entry))
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#define MSDOS_DPS_BITS 4 /* log2(MSDOS_DPS) */
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#define MSDOS_DIR_BITS 5 /* log2(sizeof(struct msdos_dir_entry)) */
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#define MSDOS_SUPER_MAGIC 0x4d44 /* MD */
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#define FAT_CACHE 8 /* FAT cache size */
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#define MSDOS_MAX_EXTRA 3 /* tolerate up to that number of clusters which are
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inaccessible because the FAT is too short */
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#define ATTR_RO 1 /* read-only */
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#define ATTR_HIDDEN 2 /* hidden */
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#define ATTR_SYS 4 /* system */
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#define ATTR_VOLUME 8 /* volume label */
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#define ATTR_DIR 16 /* directory */
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#define ATTR_ARCH 32 /* archived */
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#define ATTR_NONE 0 /* no attribute bits */
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#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
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/* attribute bits that are copied "as is" */
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#define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
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/* bits that are used by the Windows 95/Windows NT extended FAT */
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#define ATTR_DIR_READ_BOTH 512 /* read both short and long names from the
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* vfat filesystem. This is used by Samba
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* to export the vfat filesystem with correct
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* shortnames. */
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#define ATTR_DIR_READ_SHORT 1024
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#define CASE_LOWER_BASE 8 /* base is lower case */
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#define CASE_LOWER_EXT 16 /* extension is lower case */
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#define SCAN_ANY 0 /* either hidden or not */
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#define SCAN_HID 1 /* only hidden */
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#define SCAN_NOTHID 2 /* only not hidden */
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#define SCAN_NOTANY 3 /* test name, then use SCAN_HID or SCAN_NOTHID */
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#define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */
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#define IS_FREE(n) (!*(n) || *(const unsigned char *) (n) == DELETED_FLAG || \
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*(const unsigned char *) (n) == FD_FILL_BYTE)
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#define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO)
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/* valid file mode bits */
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#define MSDOS_SB(s) (&((s)->u.msdos_sb))
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#define MSDOS_I(i) (&((i)->u.msdos_i))
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#define MSDOS_NAME 11 /* maximum name length */
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#define MSDOS_LONGNAME 256 /* maximum name length */
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#define MSDOS_SLOTS 21 /* max # of slots needed for short and long names */
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#define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */
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#define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */
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#define MSDOS_FAT12 4078 /* maximum number of clusters in a 12 bit FAT */
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#define EOF_FAT12 0xFF8 /* standard EOF */
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#define EOF_FAT16 0xFFF8
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#define EOF_FAT32 0xFFFFFF8
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/*
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* Inode flags
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*/
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#define FAT_BINARY_FL 0x00000001 /* File contains binary data */
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/*
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* ioctl commands
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*/
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#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct dirent [2])
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#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct dirent [2])
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/*
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* Conversion from and to little-endian byte order. (no-op on i386/i486)
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*
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* Naming: Ca_b_c, where a: F = from, T = to, b: LE = little-endian,
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* BE = big-endian, c: W = word (16 bits), L = longword (32 bits)
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*/
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#define CF_LE_W(v) (v)
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#define CF_LE_L(v) (v)
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#define CT_LE_W(v) (v)
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#define CT_LE_L(v) (v)
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struct fat_boot_sector {
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__s8 ignored[3]; /* Boot strap short or near jump */
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__s8 system_id[8]; /* Name - can be used to special case
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partition manager volumes */
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__u8 sector_size[2]; /* bytes per logical sector */
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__u8 cluster_size; /* sectors/cluster */
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__u16 reserved; /* reserved sectors */
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__u8 fats; /* number of FATs */
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__u8 dir_entries[2]; /* root directory entries */
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__u8 sectors[2]; /* number of sectors */
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__u8 media; /* media code (unused) */
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__u16 fat_length; /* sectors/FAT */
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__u16 secs_track; /* sectors per track */
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__u16 heads; /* number of heads */
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__u32 hidden; /* hidden sectors (unused) */
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__u32 total_sect; /* number of sectors (if sectors == 0) */
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/* The following fields are only used by FAT32 */
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__u32 fat32_length; /* sectors/FAT */
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__u16 flags; /* bit 8: fat mirroring, low 4: active fat */
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__u8 version[2]; /* major, minor filesystem version */
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__u32 root_cluster; /* first cluster in root directory */
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__u16 info_sector; /* filesystem info sector */
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__u16 backup_boot; /* backup boot sector */
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__u16 reserved2[6]; /* Unused */
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};
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struct fat_boot_fsinfo {
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__u32 reserved1; /* Nothing as far as I can tell */
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__u32 signature; /* 0x61417272L */
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__u32 free_clusters; /* Free cluster count. -1 if unknown */
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__u32 next_cluster; /* Most recently allocated cluster.
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* Unused under Linux. */
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__u32 reserved2[4];
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};
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struct msdos_dir_entry {
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__s8 name[8],ext[3]; /* name and extension */
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__u8 attr; /* attribute bits */
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__u8 lcase; /* Case for base and extension */
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__u8 ctime_ms; /* Creation time, milliseconds */
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__u16 ctime; /* Creation time */
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__u16 cdate; /* Creation date */
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__u16 adate; /* Last access date */
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__u16 starthi; /* High 16 bits of cluster in FAT32 */
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__u16 time,date,start;/* time, date and first cluster */
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__u32 size; /* file size (in bytes) */
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};
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/* Up to 13 characters of the name */
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struct msdos_dir_slot {
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__u8 id; /* sequence number for slot */
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__u8 name0_4[10]; /* first 5 characters in name */
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__u8 attr; /* attribute byte */
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__u8 reserved; /* always 0 */
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__u8 alias_checksum; /* checksum for 8.3 alias */
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__u8 name5_10[12]; /* 6 more characters in name */
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__u16 start; /* starting cluster number, 0 in long slots */
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__u8 name11_12[4]; /* last 2 characters in name */
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};
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struct slot_info {
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int is_long; /* was the found entry long */
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int long_slots; /* number of long slots in filename */
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int total_slots; /* total slots (long and short) */
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loff_t longname_offset; /* dir offset for longname start */
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loff_t shortname_offset; /* dir offset for shortname start */
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int ino; /* ino for the file */
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};
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/* Determine whether this FS has kB-aligned data. */
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#define MSDOS_CAN_BMAP(mib) (!(((mib)->cluster_size & 1) || \
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((mib)->data_start & 1)))
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/* Convert attribute bits and a mask to the UNIX mode. */
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#define MSDOS_MKMODE(a,m) (m & (a & ATTR_RO ? S_IRUGO|S_IXUGO : S_IRWXUGO))
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/* Convert the UNIX mode to MS-DOS attribute bits. */
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#define MSDOS_MKATTR(m) ((m & S_IWUGO) ? ATTR_NONE : ATTR_RO)
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#ifdef __KERNEL__
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typedef int (*fat_filldir_t)(filldir_t filldir, void *, const char *,
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int, int, off_t, off_t, int, ino_t);
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struct fat_cache {
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kdev_t device; /* device number. 0 means unused. */
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int ino; /* inode number. */
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int file_cluster; /* cluster number in the file. */
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int disk_cluster; /* cluster number on disk. */
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struct fat_cache *next; /* next cache entry */
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};
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/* misc.c */
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extern int is_binary(char conversion,char *extension);
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extern void lock_fat(struct super_block *sb);
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extern void unlock_fat(struct super_block *sb);
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extern int fat_add_cluster(struct inode *inode);
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extern int date_dos2unix(__u16 time, __u16 date);
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extern void fat_fs_panic(struct super_block *s,const char *msg);
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extern void fat_lock_creation(void);
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extern void fat_unlock_creation(void);
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extern void fat_date_unix2dos(int unix_date,__u16 *time, __u16 *date);
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extern int fat_get_entry(struct inode *dir,loff_t *pos,struct buffer_head **bh,
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struct msdos_dir_entry **de);
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extern int fat_scan(struct inode *dir,const char *name,struct buffer_head **res_bh,
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struct msdos_dir_entry **res_de,int *ino,char scantype);
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extern int fat_parent_ino(struct inode *dir,int locked);
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extern int fat_subdirs(struct inode *dir);
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void fat_clusters_flush(struct super_block *sb);
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/* fat.c */
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extern int fat_access(struct super_block *sb,int nr,int new_value);
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extern int fat_smap(struct inode *inode,int sector);
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extern int fat_free(struct inode *inode,int skip);
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void fat_cache_inval_inode(struct inode *inode);
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void fat_cache_inval_dev(kdev_t device);
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extern void cache_init(void);
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void cache_lookup(struct inode *inode,int cluster,int *f_clu,int *d_clu);
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void cache_add(struct inode *inode,int f_clu,int d_clu);
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int get_cluster(struct inode *inode,int cluster);
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/* inode.c */
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extern int fat_bmap(struct inode *inode,int block);
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extern int fat_notify_change(struct inode *,struct iattr *);
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extern void fat_put_inode(struct inode *inode);
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extern void fat_put_super(struct super_block *sb);
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extern void fat_read_inode(struct inode *inode, struct inode_operations *dir_ops);
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extern struct super_block *fat_read_super(struct super_block *s, void *data, int silent);
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extern void msdos_put_super(struct super_block *sb);
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extern void fat_statfs(struct super_block *sb,struct statfs *buf, int);
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extern void fat_write_inode(struct inode *inode);
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| 235 |
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/* dir.c */
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extern struct file_operations fat_dir_operations;
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extern int fat_readdirx(struct inode *inode, struct file *filp, void *dirent,
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fat_filldir_t fat_filldir, filldir_t filldir,
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int shortnames, int longnames, int both);
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extern int fat_readdir(struct inode *inode, struct file *filp,
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void *dirent, filldir_t);
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| 242 |
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extern int fat_dir_ioctl(struct inode * inode, struct file * filp,
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unsigned int cmd, unsigned long arg);
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| 244 |
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| 245 |
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/* file.c */
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| 246 |
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extern struct inode_operations fat_file_inode_operations;
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| 247 |
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extern struct inode_operations fat_file_inode_operations_1024;
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| 248 |
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extern int fat_file_read(struct inode *, struct file *, char *, int);
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| 249 |
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extern int fat_file_write(struct inode *, struct file *, const char *, int);
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| 250 |
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extern void fat_truncate(struct inode *inode);
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| 251 |
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| 252 |
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/* mmap.c */
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| 253 |
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extern int fat_mmap(struct inode *, struct file *, struct vm_area_struct *);
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| 254 |
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| 255 |
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| 256 |
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/* vfat.c */
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| 257 |
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extern int init_vfat_fs(void);
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| 258 |
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| 259 |
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| 260 |
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/* msdosfs_syms.c */
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| 261 |
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extern int init_msdos_fs(void);
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| 262 |
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extern struct file_system_type msdos_fs_type;
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| 263 |
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| 264 |
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/* msdos.c */
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| 265 |
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extern struct super_block *msdos_read_super(struct super_block *sb,void *data, int silent);
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| 266 |
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| 267 |
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/* msdos.c - these are for Umsdos */
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| 268 |
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extern void msdos_read_inode(struct inode *inode);
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| 269 |
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extern int msdos_lookup(struct inode *dir,const char *name,int len,
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| 270 |
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struct inode **result);
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| 271 |
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extern int msdos_create(struct inode *dir,const char *name,int len,int mode,
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| 272 |
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struct inode **result);
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| 273 |
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extern int msdos_rmdir(struct inode *dir,const char *name,int len);
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| 274 |
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extern int msdos_mkdir(struct inode *dir,const char *name,int len,int mode);
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| 275 |
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extern int msdos_unlink(struct inode *dir,const char *name,int len);
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| 276 |
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extern int msdos_unlink_umsdos(struct inode *dir,const char *name,int len);
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| 277 |
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extern int msdos_rename(struct inode *old_dir,const char *old_name,int old_len,
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| 278 |
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struct inode *new_dir,const char *new_name,int new_len,
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| 279 |
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int must_be_dir);
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| 280 |
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| 281 |
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/* nls.c */
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| 282 |
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extern int init_fat_nls(void);
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| 283 |
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extern struct fat_nls_table *fat_load_nls(int codepage);
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| 284 |
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| 285 |
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/* tables.c */
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| 286 |
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extern unsigned char fat_uni2esc[];
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| 287 |
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extern unsigned char fat_esc2uni[];
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| 288 |
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| 289 |
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/* fatfs_syms.c */
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| 290 |
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extern int init_fat_fs(void);
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| 291 |
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extern void cleanup_fat_fs(void);
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| 292 |
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| 293 |
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/* nls.c */
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| 294 |
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extern int fat_register_nls(struct fat_nls_table * fmt);
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| 295 |
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extern int fat_unregister_nls(struct fat_nls_table * fmt);
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| 296 |
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extern struct fat_nls_table *fat_find_nls(int codepage);
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| 297 |
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extern struct fat_nls_table *fat_load_nls(int codepage);
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| 298 |
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extern void fat_unload_nls(int codepage);
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| 299 |
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extern int init_fat_nls(void);
|
| 300 |
|
|
|
| 301 |
|
|
|
| 302 |
|
|
/* vfat/namei.c - these are for dmsdos */
|
| 303 |
|
|
extern int vfat_create(struct inode *dir,const char *name,int len,int mode,
|
| 304 |
|
|
struct inode **result);
|
| 305 |
|
|
extern int vfat_unlink(struct inode *dir,const char *name,int len);
|
| 306 |
|
|
extern int vfat_unlink_uvfat(struct inode *dir,const char *name,int len);
|
| 307 |
|
|
extern int vfat_mkdir(struct inode *dir,const char *name,int len,int mode);
|
| 308 |
|
|
extern int vfat_rmdir(struct inode *dir,const char *name,int len);
|
| 309 |
|
|
extern int vfat_rename(struct inode *old_dir,const char *old_name,int old_len,
|
| 310 |
|
|
struct inode *new_dir,const char *new_name,int new_len,
|
| 311 |
|
|
int must_be_dir);
|
| 312 |
|
|
extern void vfat_put_super(struct super_block *sb);
|
| 313 |
|
|
extern struct super_block *vfat_read_super(struct super_block *sb,void *data,
|
| 314 |
|
|
int silent);
|
| 315 |
|
|
extern void vfat_read_inode(struct inode *inode);
|
| 316 |
|
|
extern int vfat_lookup(struct inode *dir,const char *name,int len,
|
| 317 |
|
|
struct inode **result);
|
| 318 |
|
|
|
| 319 |
|
|
/* vfat/vfatfs_syms.c */
|
| 320 |
|
|
extern struct file_system_type vfat_fs_type;
|
| 321 |
|
|
|
| 322 |
|
|
|
| 323 |
|
|
#endif /* __KERNEL__ */
|
| 324 |
|
|
|
| 325 |
|
|
#endif
|
