#ifndef _LINUX_MSDOS_FS_H #define _LINUX_MSDOS_FS_H /* * The MS-DOS filesystem constants/structures */ #include #include #include #include #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 || \ *(const unsigned char *) (n) == FD_FILL_BYTE) #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 4078 /* maximum number of clusters in a 12 bit FAT */ #define EOF_FAT12 0xFF8 /* standard EOF */ #define EOF_FAT16 0xFFF8 #define EOF_FAT32 0xFFFFFF8 #define EOF_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? EOF_FAT32 : \ MSDOS_SB(s)->fat_bits == 16 ? EOF_FAT16 : EOF_FAT12) /* * 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]) /* * 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 reserved1; /* Nothing as far as I can tell */ __u32 signature; /* 0x61417272L */ __u32 free_clusters; /* Free cluster count. -1 if unknown */ __u32 next_cluster; /* Most recently allocated cluster. * Unused under Linux. */ __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 */ int ino; /* ino for the file */ }; /* 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__ typedef int (*fat_filldir_t)(filldir_t filldir, void *, const char *, int, int, off_t, off_t, int, ino_t); struct fat_cache { kdev_t device; /* device number. 0 means unused. */ int ino; /* inode number. */ int file_cluster; /* cluster number in the file. */ int disk_cluster; /* cluster number on disk. */ struct fat_cache *next; /* next cache entry */ }; /* misc.c */ extern int is_binary(char conversion,char *extension); extern void lock_fat(struct super_block *sb); extern void unlock_fat(struct super_block *sb); extern int fat_add_cluster(struct inode *inode); extern int date_dos2unix(__u16 time, __u16 date); extern void fat_fs_panic(struct super_block *s,const char *msg); extern void fat_lock_creation(void); extern void fat_unlock_creation(void); extern void fat_date_unix2dos(int unix_date,__u16 *time, __u16 *date); extern int fat_get_entry(struct inode *dir,loff_t *pos,struct buffer_head **bh, struct msdos_dir_entry **de); extern int fat_scan(struct inode *dir,const char *name,struct buffer_head **res_bh, struct msdos_dir_entry **res_de,int *ino,char scantype); extern int fat_parent_ino(struct inode *dir,int locked); extern int fat_subdirs(struct inode *dir); void fat_clusters_flush(struct super_block *sb); /* fat.c */ extern int fat_access(struct super_block *sb,int nr,int new_value); extern int fat_smap(struct inode *inode,int sector); extern int fat_free(struct inode *inode,int skip); void fat_cache_inval_inode(struct inode *inode); void fat_cache_inval_dev(kdev_t device); extern void fat_cache_init(void); void fat_cache_lookup(struct inode *inode,int cluster,int *f_clu,int *d_clu); void fat_cache_add(struct inode *inode,int f_clu,int d_clu); int fat_get_cluster(struct inode *inode,int cluster); /* inode.c */ extern int fat_bmap(struct inode *inode,int block); extern int fat_notify_change(struct dentry *, struct iattr *); extern void fat_put_inode(struct inode *inode); extern void fat_delete_inode(struct inode *inode); extern void fat_put_super(struct super_block *sb); extern void fat_read_inode(struct inode *inode, struct inode_operations *dir_ops); extern struct super_block *fat_read_super(struct super_block *s, void *data, int silent); extern void msdos_put_super(struct super_block *sb); extern int fat_statfs(struct super_block *sb,struct statfs *buf, int); extern void fat_write_inode(struct inode *inode); /* dir.c */ extern struct file_operations fat_dir_operations; extern int fat_readdirx(struct inode *inode, struct file *filp, void *dirent, fat_filldir_t fat_filldir, filldir_t filldir, int shortnames, int longnames, int both); extern int fat_readdir(struct file *filp, void *dirent, filldir_t); extern int fat_dir_ioctl(struct inode * inode, struct file * filp, unsigned int cmd, unsigned long arg); /* file.c */ extern struct inode_operations fat_file_inode_operations; extern struct inode_operations fat_file_inode_operations_1024; extern struct inode_operations fat_file_inode_operations_readpage; extern ssize_t fat_file_read(struct file *, char *, size_t, loff_t *); extern ssize_t fat_file_write(struct file *, const char *, size_t, loff_t *); extern void fat_truncate(struct inode *inode); /* mmap.c */ extern int fat_mmap(struct file *, struct vm_area_struct *); extern int fat_readpage(struct file *, struct page *); /* vfat.c */ extern int init_vfat_fs(void); /* msdosfs_syms.c */ extern int init_msdos_fs(void); extern struct file_system_type msdos_fs_type; /* msdos.c */ extern struct super_block *msdos_read_super(struct super_block *sb,void *data, int silent); /* msdos.c - these are for Umsdos */ extern void msdos_read_inode(struct inode *inode); extern int 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_unlink_umsdos(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); /* nls.c */ extern int init_fat_nls(void); extern struct fat_nls_table *fat_load_nls(int codepage); /* tables.c */ extern unsigned char fat_uni2esc[]; extern unsigned char fat_esc2uni[]; /* fatfs_syms.c */ extern int init_fat_fs(void); extern void cleanup_fat_fs(void); /* nls.c */ extern int fat_register_nls(struct fat_nls_table * fmt); extern int fat_unregister_nls(struct fat_nls_table * fmt); extern struct fat_nls_table *fat_find_nls(int codepage); extern struct fat_nls_table *fat_load_nls(int codepage); extern void fat_unload_nls(int codepage); extern int init_fat_nls(void); /* vfat/namei.c - these are for dmsdos */ extern int vfat_create(struct inode *dir,struct dentry *dentry,int mode); extern int vfat_unlink(struct inode *dir,struct dentry *dentry); extern int vfat_unlink_uvfat(struct inode *dir,struct dentry *dentry); extern int vfat_mkdir(struct inode *dir,struct dentry *dentry,int mode); extern int vfat_rmdir(struct inode *dir,struct dentry *dentry); extern int vfat_rename(struct inode *old_dir,struct dentry *old_dentry, struct inode *new_dir,struct dentry *new_dentry); extern void vfat_put_super(struct super_block *sb); extern struct super_block *vfat_read_super(struct super_block *sb,void *data, int silent); extern void vfat_read_inode(struct inode *inode); extern int vfat_lookup(struct inode *dir,struct dentry *); /* vfat/vfatfs_syms.c */ extern struct file_system_type vfat_fs_type; #endif /* __KERNEL__ */ #endif