| #ifndef _LINUX_MSDOS_FS_H |
| #define _LINUX_MSDOS_FS_H |
| |
| /* |
| * The MS-DOS filesystem constants/structures |
| */ |
| #include <linux/fs.h> |
| #include <linux/stat.h> |
| #include <linux/fd.h> |
| |
| #include <asm/byteorder.h> |
| |
| #define MSDOS_ROOT_INO 1 /* == MINIX_ROOT_INO */ |
| #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_DIR_BITS 5 /* log2(sizeof(struct msdos_dir_entry)) */ |
| |
| #define MSDOS_SUPER_MAGIC 0x4d44 /* MD */ |
| |
| #define FAT_CACHE 8 /* FAT cache size */ |
| |
| #define MSDOS_MAX_EXTRA 3 /* tolerate up to that number of clusters which are |
| inaccessible because the FAT is too short */ |
| |
| #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 */ |
| |
| #define ATTR_NONE 0 /* no attribute bits */ |
| #define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN) |
| /* attribute bits that are copied "as is" */ |
| #define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME) |
| /* bits that are used by the Windows 95/Windows NT extended FAT */ |
| |
| #define ATTR_DIR_READ_BOTH 512 /* read both short and long names from the |
| * vfat filesystem. This is used by Samba |
| * to export the vfat filesystem with correct |
| * shortnames. */ |
| #define ATTR_DIR_READ_SHORT 1024 |
| |
| #define CASE_LOWER_BASE 8 /* base is lower case */ |
| #define CASE_LOWER_EXT 16 /* extension is lower case */ |
| |
| #define SCAN_ANY 0 /* either hidden or not */ |
| #define SCAN_HID 1 /* only hidden */ |
| #define SCAN_NOTHID 2 /* only not hidden */ |
| #define SCAN_NOTANY 3 /* test name, then use SCAN_HID or SCAN_NOTHID */ |
| |
| #define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */ |
| #define IS_FREE(n) (!*(n) || *(const unsigned char *) (n) == DELETED_FLAG) |
| |
| #define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO) |
| /* valid file mode bits */ |
| |
| #define MSDOS_SB(s) (&((s)->u.msdos_sb)) |
| #define MSDOS_I(i) (&((i)->u.msdos_i)) |
| |
| #define MSDOS_NAME 11 /* maximum name length */ |
| #define MSDOS_LONGNAME 256 /* maximum name length */ |
| #define MSDOS_SLOTS 21 /* max # of slots needed for short and long names */ |
| #define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */ |
| #define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */ |
| |
| #define MSDOS_FAT12 4084 /* maximum number of clusters in a 12 bit FAT */ |
| |
| #define EOF_FAT12 0xFFF /* standard EOF */ |
| #define EOF_FAT16 0xFFFF |
| #define EOF_FAT32 0xFFFFFFF |
| #define EOF_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? EOF_FAT32 : \ |
| MSDOS_SB(s)->fat_bits == 16 ? EOF_FAT16 : EOF_FAT12) |
| |
| #define FAT_FSINFO_SIG1 0x41615252 |
| #define FAT_FSINFO_SIG2 0x61417272 |
| #define IS_FSINFO(x) (CF_LE_L((x)->signature1) == FAT_FSINFO_SIG1 \ |
| && CF_LE_L((x)->signature2) == FAT_FSINFO_SIG2) |
| |
| /* |
| * Inode flags |
| */ |
| #define FAT_BINARY_FL 0x00000001 /* File contains binary data */ |
| |
| /* |
| * ioctl commands |
| */ |
| #define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct dirent [2]) |
| #define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct dirent [2]) |
| |
| /* |
| * vfat shortname flags |
| */ |
| #define VFAT_SFN_DISPLAY_LOWER 0x0001 /* convert to lowercase for display */ |
| #define VFAT_SFN_DISPLAY_WIN95 0x0002 /* emulate win95 rule for display */ |
| #define VFAT_SFN_DISPLAY_WINNT 0x0004 /* emulate winnt rule for display */ |
| #define VFAT_SFN_CREATE_WIN95 0x0100 /* emulate win95 rule for create */ |
| #define VFAT_SFN_CREATE_WINNT 0x0200 /* emulate winnt rule for create */ |
| |
| /* |
| * Conversion from and to little-endian byte order. (no-op on i386/i486) |
| * |
| * Naming: Ca_b_c, where a: F = from, T = to, b: LE = little-endian, |
| * BE = big-endian, c: W = word (16 bits), L = longword (32 bits) |
| */ |
| |
| #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) |
| |
| struct fat_boot_sector { |
| __s8 ignored[3]; /* Boot strap short or near jump */ |
| __s8 system_id[8]; /* Name - can be used to special case |
| partition manager volumes */ |
| __u8 sector_size[2]; /* bytes per logical sector */ |
| __u8 cluster_size; /* sectors/cluster */ |
| __u16 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 (unused) */ |
| __u16 fat_length; /* sectors/FAT */ |
| __u16 secs_track; /* sectors per track */ |
| __u16 heads; /* number of heads */ |
| __u32 hidden; /* hidden sectors (unused) */ |
| __u32 total_sect; /* number of sectors (if sectors == 0) */ |
| |
| /* The following fields are only used by FAT32 */ |
| __u32 fat32_length; /* sectors/FAT */ |
| __u16 flags; /* bit 8: fat mirroring, low 4: active fat */ |
| __u8 version[2]; /* major, minor filesystem version */ |
| __u32 root_cluster; /* first cluster in root directory */ |
| __u16 info_sector; /* filesystem info sector */ |
| __u16 backup_boot; /* backup boot sector */ |
| __u16 reserved2[6]; /* Unused */ |
| }; |
| |
| struct fat_boot_fsinfo { |
| __u32 signature1; /* 0x41615252L */ |
| __u32 reserved1[120]; /* Nothing as far as I can tell */ |
| __u32 signature2; /* 0x61417272L */ |
| __u32 free_clusters; /* Free cluster count. -1 if unknown */ |
| __u32 next_cluster; /* Most recently allocated cluster */ |
| __u32 reserved2[4]; |
| }; |
| |
| struct msdos_dir_entry { |
| __s8 name[8],ext[3]; /* name and extension */ |
| __u8 attr; /* attribute bits */ |
| __u8 lcase; /* Case for base and extension */ |
| __u8 ctime_ms; /* Creation time, milliseconds */ |
| __u16 ctime; /* Creation time */ |
| __u16 cdate; /* Creation date */ |
| __u16 adate; /* Last access date */ |
| __u16 starthi; /* High 16 bits of cluster in FAT32 */ |
| __u16 time,date,start;/* time, date and first cluster */ |
| __u32 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 */ |
| __u16 start; /* starting cluster number, 0 in long slots */ |
| __u8 name11_12[4]; /* last 2 characters in name */ |
| }; |
| |
| struct vfat_slot_info { |
| int is_long; /* was the found entry long */ |
| int long_slots; /* number of long slots in filename */ |
| int total_slots; /* total slots (long and short) */ |
| loff_t longname_offset; /* dir offset for longname start */ |
| loff_t shortname_offset; /* dir offset for shortname start */ |
| loff_t i_pos; /* on-disk position of directory entry */ |
| }; |
| |
| /* Determine whether this FS has kB-aligned data. */ |
| #define MSDOS_CAN_BMAP(mib) (!(((mib)->cluster_size & 1) || \ |
| ((mib)->data_start & 1))) |
| |
| /* Convert attribute bits and a mask to the UNIX mode. */ |
| #define MSDOS_MKMODE(a,m) (m & (a & ATTR_RO ? S_IRUGO|S_IXUGO : S_IRWXUGO)) |
| |
| /* Convert the UNIX mode to MS-DOS attribute bits. */ |
| #define MSDOS_MKATTR(m) ((m & S_IWUGO) ? ATTR_NONE : ATTR_RO) |
| |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/nls.h> |
| |
| struct fat_cache { |
| kdev_t device; /* device number. 0 means unused. */ |
| int start_cluster; /* first cluster of the chain. */ |
| int file_cluster; /* cluster number in the file. */ |
| int disk_cluster; /* cluster number on disk. */ |
| struct fat_cache *next; /* next cache entry */ |
| }; |
| |
| static inline void fat16_towchar(wchar_t *dst, const __u8 *src, size_t len) |
| { |
| #ifdef __BIG_ENDIAN |
| while (len--) { |
| *dst++ = src[0] | (src[1] << 8); |
| src += 2; |
| } |
| #else |
| memcpy(dst, src, len * 2); |
| #endif |
| } |
| |
| static inline void fatwchar_to16(__u8 *dst, const wchar_t *src, size_t len) |
| { |
| #ifdef __BIG_ENDIAN |
| while (len--) { |
| dst[0] = *src & 0x00FF; |
| dst[1] = (*src & 0xFF00) >> 8; |
| dst += 2; |
| src++; |
| } |
| #else |
| memcpy(dst, src, len * 2); |
| #endif |
| } |
| |
| /* fat/buffer.c */ |
| extern struct buffer_head *fat_bread(struct super_block *sb, int block); |
| extern struct buffer_head *fat_getblk(struct super_block *sb, int block); |
| extern void fat_brelse(struct super_block *sb, struct buffer_head *bh); |
| extern void fat_mark_buffer_dirty(struct super_block *sb, struct buffer_head *bh); |
| extern void fat_set_uptodate(struct super_block *sb, struct buffer_head *bh, |
| int val); |
| extern int fat_is_uptodate(struct super_block *sb, struct buffer_head *bh); |
| extern void fat_ll_rw_block(struct super_block *sb, int opr, int nbreq, |
| struct buffer_head *bh[32]); |
| |
| /* fat/cache.c */ |
| extern int fat_access(struct super_block *sb, int nr, int new_value); |
| extern int fat_bmap(struct inode *inode, int sector); |
| extern void fat_cache_init(void); |
| extern void fat_cache_lookup(struct inode *inode, int cluster, int *f_clu, |
| int *d_clu); |
| extern void fat_cache_add(struct inode *inode, int f_clu, int d_clu); |
| extern void fat_cache_inval_inode(struct inode *inode); |
| extern void fat_cache_inval_dev(kdev_t device); |
| extern int fat_get_cluster(struct inode *inode, int cluster); |
| extern int fat_free(struct inode *inode, int skip); |
| |
| /* fat/dir.c */ |
| extern struct file_operations fat_dir_operations; |
| extern int fat_search_long(struct inode *inode, const char *name, int name_len, |
| int anycase, loff_t *spos, loff_t *lpos); |
| extern int fat_readdir(struct file *filp, void *dirent, filldir_t filldir); |
| extern int fat_dir_ioctl(struct inode * inode, struct file * filp, |
| unsigned int cmd, unsigned long arg); |
| extern int fat_dir_empty(struct inode *dir); |
| extern int fat_add_entries(struct inode *dir, int slots, struct buffer_head **bh, |
| struct msdos_dir_entry **de, loff_t *i_pos); |
| extern int fat_new_dir(struct inode *dir, struct inode *parent, int is_vfat); |
| |
| /* fat/file.c */ |
| extern struct file_operations fat_file_operations; |
| extern struct inode_operations fat_file_inode_operations; |
| extern ssize_t fat_file_read(struct file *filp, char *buf, size_t count, |
| loff_t *ppos); |
| extern int fat_get_block(struct inode *inode, long iblock, |
| struct buffer_head *bh_result, int create); |
| extern ssize_t fat_file_write(struct file *filp, const char *buf, size_t count, |
| loff_t *ppos); |
| extern void fat_truncate(struct inode *inode); |
| |
| /* fat/inode.c */ |
| extern void fat_hash_init(void); |
| extern void fat_attach(struct inode *inode, loff_t i_pos); |
| extern void fat_detach(struct inode *inode); |
| extern struct inode *fat_iget(struct super_block *sb, loff_t i_pos); |
| extern struct inode *fat_build_inode(struct super_block *sb, |
| struct msdos_dir_entry *de, loff_t i_pos, int *res); |
| extern void fat_delete_inode(struct inode *inode); |
| extern void fat_clear_inode(struct inode *inode); |
| extern void fat_put_super(struct super_block *sb); |
| extern struct super_block * |
| fat_read_super(struct super_block *sb, void *data, int silent, |
| struct inode_operations *fs_dir_inode_ops); |
| extern int fat_statfs(struct super_block *sb, struct statfs *buf); |
| extern void fat_write_inode(struct inode *inode, int wait); |
| extern int fat_notify_change(struct dentry * dentry, struct iattr * attr); |
| |
| /* fat/misc.c */ |
| extern void fat_fs_panic(struct super_block *s, const char *msg); |
| extern int fat_is_binary(char conversion, char *extension); |
| extern void lock_fat(struct super_block *sb); |
| extern void unlock_fat(struct super_block *sb); |
| extern void fat_clusters_flush(struct super_block *sb); |
| extern int fat_add_cluster(struct inode *inode); |
| extern struct buffer_head *fat_extend_dir(struct inode *inode); |
| extern int date_dos2unix(unsigned short time, unsigned short date); |
| extern void fat_date_unix2dos(int unix_date, unsigned short *time, |
| unsigned short *date); |
| extern int fat__get_entry(struct inode *dir, loff_t *pos, |
| struct buffer_head **bh, |
| struct msdos_dir_entry **de, loff_t *i_pos); |
| static __inline__ int fat_get_entry(struct inode *dir, loff_t *pos, |
| struct buffer_head **bh, |
| struct msdos_dir_entry **de, loff_t *i_pos) |
| { |
| /* Fast stuff first */ |
| if (*bh && *de && |
| (*de - (struct msdos_dir_entry *)(*bh)->b_data) < MSDOS_SB(dir->i_sb)->dir_per_block - 1) { |
| *pos += sizeof(struct msdos_dir_entry); |
| (*de)++; |
| (*i_pos)++; |
| return 0; |
| } |
| return fat__get_entry(dir, pos, bh, de, i_pos); |
| } |
| extern int fat_subdirs(struct inode *dir); |
| extern int fat_scan(struct inode *dir, const char *name, |
| struct buffer_head **res_bh, |
| struct msdos_dir_entry **res_de, loff_t *i_pos); |
| |
| /* msdos/namei.c - these are for Umsdos */ |
| extern void msdos_put_super(struct super_block *sb); |
| extern struct dentry *msdos_lookup(struct inode *dir, struct dentry *); |
| extern int msdos_create(struct inode *dir, struct dentry *dentry, int mode); |
| extern int msdos_rmdir(struct inode *dir, struct dentry *dentry); |
| extern int msdos_mkdir(struct inode *dir, struct dentry *dentry, int mode); |
| extern int msdos_unlink(struct inode *dir, struct dentry *dentry); |
| extern int msdos_rename(struct inode *old_dir, struct dentry *old_dentry, |
| struct inode *new_dir, struct dentry *new_dentry); |
| extern struct super_block *msdos_read_super(struct super_block *sb, |
| void *data, int silent); |
| |
| /* vfat/namei.c - these are for dmsdos */ |
| extern struct dentry *vfat_lookup(struct inode *dir, struct dentry *); |
| extern int vfat_create(struct inode *dir, struct dentry *dentry, int mode); |
| extern int vfat_rmdir(struct inode *dir, struct dentry *dentry); |
| extern int vfat_unlink(struct inode *dir, struct dentry *dentry); |
| extern int vfat_mkdir(struct inode *dir, struct dentry *dentry, int mode); |
| extern int vfat_rename(struct inode *old_dir, struct dentry *old_dentry, |
| struct inode *new_dir, struct dentry *new_dentry); |
| extern struct super_block *vfat_read_super(struct super_block *sb, void *data, |
| int silent); |
| |
| /* vfat/vfatfs_syms.c */ |
| extern struct file_system_type vfat_fs_type; |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif |
