http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/msdos_fs.h

#ifndef _LINUX_MSDOS_FS_H #define _LINUX_MSDOS_FS_H /* * The MS-DOS filesystem constants/structures */ #include <asm/byteorder.h> #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 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_SUPER_MAGIC 0x4d44 /* MD */ #define MSDOS_ROOT_INO 1 /* == MINIX_ROOT_INO */ #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) /* valid file mode bits */ #define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO) /* 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)) #define MSDOS_NAME 11 /* maximum name length */ #define MSDOS_LONGNAME 256 /* 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 */ /* media of boot sector */ #define FAT_VALID_MEDIA(x) ((0xF8 <= (x) && (x) <= 0xFF) || (x) == 0xF0) #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) /* * ioctl commands */ #define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct dirent [2]) #define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct 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) /* * 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 */ 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[8],ext[3]; /* 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 */ }; struct fat_slot_info { loff_t i_pos; /* on-disk position of directory entry */ loff_t slot_off; /* offset for slot or de start */ int nr_slots; /* number of slots + 1(de) in filename */ struct msdos_dir_entry *de; struct buffer_head *bh; }; #ifdef __KERNEL__ #include <linux/buffer_head.h> #include <linux/string.h> #include <linux/nls.h> #include <linux/fs.h> struct fat_mount_options { uid_t fs_uid; gid_t fs_gid; unsigned short fs_fmask; unsigned short fs_dmask; unsigned short codepage; /* Codepage for shortname conversions */ char *iocharset; /* Charset used for filename input/display */ unsigned short shortname; /* flags for shortname display/create rule */ unsigned char name_check; /* r = relaxed, n = normal, s = strict */ unsigned quiet:1, /* set = fake successful chmods and chowns */ showexec:1, /* set = only set x bit for com/exe/bat */ sys_immutable:1, /* set = system files are immutable */ dotsOK:1, /* set = hidden and system files are named '.filename' */ isvfat:1, /* 0=no vfat long filename support, 1=vfat support */ utf8:1, /* Use of UTF8 character set (Default) */ unicode_xlate:1, /* create escape sequences for unhandled Unicode */ numtail:1, /* Does first alias have a numeric '~1' type tail? */ atari:1, /* Use Atari GEMDOS variation of MS-DOS fs */ nocase:1; /* Does this need case conversion? 0=need case conversion*/ }; #define FAT_HASH_BITS 8 #define FAT_HASH_SIZE (1UL << FAT_HASH_BITS) #define FAT_HASH_MASK (FAT_HASH_SIZE-1) /* * MS-DOS file system in-core superblock data */ struct msdos_sb_info { unsigned short sec_per_clus; /* sectors/cluster */ unsigned short cluster_bits; /* log2(cluster_size) */ unsigned int cluster_size; /* cluster size */ unsigned char fats,fat_bits; /* number of FATs, FAT bits (12 or 16) */ unsigned short fat_start; unsigned long fat_length; /* FAT start & length (sec.) */ unsigned long dir_start; unsigned short dir_entries; /* root dir start & entries */ unsigned long data_start; /* first data sector */ unsigned long max_cluster; /* maximum cluster number */ unsigned long root_cluster; /* first cluster of the root directory */ unsigned long fsinfo_sector; /* sector number of FAT32 fsinfo */ struct semaphore fat_lock; unsigned int prev_free; /* previously allocated cluster number */ unsigned int free_clusters; /* -1 if undefined */ struct fat_mount_options options; struct nls_table *nls_disk; /* Codepage used on disk */ struct nls_table *nls_io; /* Charset used for input and display */ void *dir_ops; /* Opaque; default directory operations */ int dir_per_block; /* dir entries per block */ int dir_per_block_bits; /* log2(dir_per_block) */ int fatent_shift; struct fatent_operations *fatent_ops; spinlock_t inode_hash_lock; struct hlist_head inode_hashtable[FAT_HASH_SIZE]; }; #define FAT_CACHE_VALID 0 /* special case for valid cache */ /* * MS-DOS file system inode data in memory */ struct msdos_inode_info { spinlock_t cache_lru_lock; struct list_head cache_lru; int nr_caches; /* for avoiding the race between fat_free() and fat_get_cluster() */ unsigned int cache_valid_id; loff_t mmu_private; int i_start; /* first cluster or 0 */ int i_logstart; /* logical first cluster */ int i_attrs; /* unused attribute bits */ loff_t i_pos; /* on-disk position of directory entry or 0 */ struct hlist_node i_fat_hash; /* hash by i_location */ struct inode vfs_inode; }; static inline struct msdos_sb_info *MSDOS_SB(struct super_block *sb) { return sb->s_fs_info; } static inline struct msdos_inode_info *MSDOS_I(struct inode *inode) { return container_of(inode, struct msdos_inode_info, vfs_inode); } /* Return the FAT attribute byte for this inode */ static inline u8 fat_attr(struct inode *inode) { return ((inode->i_mode & S_IWUGO) ? ATTR_NONE : ATTR_RO) | (S_ISDIR(inode->i_mode) ? ATTR_DIR : ATTR_NONE) | MSDOS_I(inode)->i_attrs; } static inline unsigned char fat_checksum(const __u8 *name) { unsigned char s = name[0]; s = (s<<7) + (s>>1) + name[1]; s = (s<<7) + (s>>1) + name[2]; s = (s<<7) + (s>>1) + name[3]; s = (s<<7) + (s>>1) + name[4]; s = (s<<7) + (s>>1) + name[5]; s = (s<<7) + (s>>1) + name[6]; s = (s<<7) + (s>>1) + name[7]; s = (s<<7) + (s>>1) + name[8]; s = (s<<7) + (s>>1) + name[9]; s = (s<<7) + (s>>1) + name[10]; return s; } static inline sector_t fat_clus_to_blknr(struct msdos_sb_info *sbi, int clus) { return ((sector_t)clus - FAT_START_ENT) * sbi->sec_per_clus + sbi->data_start; } 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/cache.c */ extern void fat_cache_inval_inode(struct inode *inode); extern int fat_get_cluster(struct inode *inode, int cluster, int *fclus, int *dclus); extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys, unsigned long *mapped_blocks); /* fat/dir.c */ extern struct file_operations fat_dir_operations; extern int fat_search_long(struct inode *inode, const unsigned char *name, int name_len, struct fat_slot_info *sinfo); extern int fat_dir_empty(struct inode *dir); extern int fat_subdirs(struct inode *dir); extern int fat_scan(struct inode *dir, const unsigned char *name, struct fat_slot_info *sinfo); extern int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh, struct msdos_dir_entry **de, loff_t *i_pos); extern int fat_alloc_new_dir(struct inode *dir, struct timespec *ts); extern int fat_add_entries(struct inode *dir, void *slots, int nr_slots, struct fat_slot_info *sinfo); extern int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo); /* fat/fatent.c */ struct fat_entry { int entry; union { u8 *ent12_p[2]; __le16 *ent16_p; __le32 *ent32_p; } u; int nr_bhs; struct buffer_head *bhs[2]; }; static inline void fatent_init(struct fat_entry *fatent) { fatent->nr_bhs = 0; fatent->entry = 0; fatent->u.ent32_p = NULL; fatent->bhs[0] = fatent->bhs[1] = NULL; } static inline void fatent_set_entry(struct fat_entry *fatent, int entry) { fatent->entry = entry; fatent->u.ent32_p = NULL; } static inline void fatent_brelse(struct fat_entry *fatent) { int i; fatent->u.ent32_p = NULL; for (i = 0; i < fatent->nr_bhs; i++) brelse(fatent->bhs[i]); fatent->nr_bhs = 0; fatent->bhs[0] = fatent->bhs[1] = NULL; } extern void fat_ent_access_init(struct super_block *sb); extern int fat_ent_read(struct inode *inode, struct fat_entry *fatent, int entry); extern int fat_ent_write(struct inode *inode, struct fat_entry *fatent, int new, int wait); extern int fat_alloc_clusters(struct inode *inode, int *cluster, int nr_cluster); extern int fat_free_clusters(struct inode *inode, int cluster); extern int fat_count_free_clusters(struct super_block *sb); /* fat/file.c */ extern int fat_generic_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern struct file_operations fat_file_operations; extern struct inode_operations fat_file_inode_operations; extern int fat_notify_change(struct dentry * dentry, struct iattr * attr); extern void fat_truncate(struct inode *inode); /* fat/inode.c */ 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); extern int fat_sync_inode(struct inode *inode); extern int fat_fill_super(struct super_block *sb, void *data, int silent, struct inode_operations *fs_dir_inode_ops, int isvfat); /* fat/misc.c */ extern void fat_fs_panic(struct super_block *s, const char *fmt, ...); extern void fat_clusters_flush(struct super_block *sb); extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster); extern int date_dos2unix(unsigned short time, unsigned short date); extern void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date); extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs); #endif /* __KERNEL__ */ #endif