#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 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 */
+#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)
+#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 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 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 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))
/* Convert the UNIX mode to MS-DOS attribute bits. */
-#define MSDOS_MKATTR(m) ((m & S_IWUGO) ? ATTR_NONE : ATTR_RO)
+#define MSDOS_MKATTR(m) ((m & S_IWUGO) ? ATTR_NONE : ATTR_RO)
-#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_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 : \
+#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
-#define BAD_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? BAD_FAT32 : \
+#define BAD_FAT12 0xFF7
+#define BAD_FAT16 0xFFF7
+#define BAD_FAT32 0x0FFFFFF7
+#define BAD_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? BAD_FAT32 : \
MSDOS_SB(s)->fat_bits == 16 ? BAD_FAT16 : BAD_FAT12)
/* standard EOF */
-#define EOF_FAT12 0xFFF
-#define EOF_FAT16 0xFFFF
-#define EOF_FAT32 0x0FFFFFFF
-#define EOF_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? EOF_FAT32 : \
+#define EOF_FAT12 0xFFF
+#define EOF_FAT16 0xFFFF
+#define EOF_FAT32 0x0FFFFFFF
+#define EOF_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? EOF_FAT32 : \
MSDOS_SB(s)->fat_bits == 16 ? EOF_FAT16 : EOF_FAT12)
#define FAT_ENT_FREE (0)
#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)
+#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])
-/*
+/*
* vfat shortname flags
*/
#define VFAT_SFN_DISPLAY_LOWER 0x0001 /* convert to lowercase 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 {
__u8 ignored[3]; /* Boot strap short or near jump */
__u8 system_id[8]; /* Name - can be used to special case
__le16 ctime; /* Creation time */
__le16 cdate; /* Creation date */
__le16 adate; /* Last access date */
- __le16 starthi; /* High 16 bits of cluster in FAT32 */
+ __le16 starthi; /* High 16 bits of cluster in FAT32 */
__le16 time,date,start;/* time, date and first cluster */
__le32 size; /* file size (in bytes) */
};
};
struct vfat_slot_info {
- int long_slots; /* number of long slots in filename */
- loff_t longname_offset; /* dir offset for longname start */
- loff_t i_pos; /* on-disk position of directory entry */
+ int long_slots; /* number of long slots in filename */
+ loff_t longname_offset; /* dir offset for longname start */
+ loff_t i_pos; /* on-disk position of directory entry */
};
#ifdef __KERNEL__
#include <linux/buffer_head.h>
#include <linux/string.h>
#include <linux/nls.h>
-#include <linux/msdos_fs_i.h>
-#include <linux/msdos_fs_sb.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;
+ int prev_free; /* previously allocated cluster number */
+ 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) */
+
+ 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 */
+ int i_ctime_ms; /* unused change time in milliseconds */
+ 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 container_of(inode, struct msdos_inode_info, vfs_inode);
}
+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
}
/* fat/cache.c */
-extern int fat_access(struct super_block *sb, int nr, int new_value);
-extern int __fat_access(struct super_block *sb, int nr, int new_value);
-extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys);
-extern void fat_cache_init(struct super_block *sb);
-extern void fat_cache_add(struct inode *inode, int f_clu, int d_clu);
extern void fat_cache_inval_inode(struct inode *inode);
+extern int fat_access(struct super_block *sb, int nr, int new_value);
extern int fat_get_cluster(struct inode *inode, int cluster,
int *fclus, int *dclus);
-extern int fat_free(struct inode *inode, int skip);
+extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys);
/* 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, 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_add_entries(struct inode *dir, int slots, struct buffer_head **bh,
- struct msdos_dir_entry **de, loff_t *i_pos);
+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);
extern int fat_dir_empty(struct inode *dir);
extern int fat_subdirs(struct inode *dir);
/* fat/file.c */
extern struct file_operations fat_file_operations;
extern struct inode_operations fat_file_inode_operations;
-extern int fat_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create);
+extern int fat_notify_change(struct dentry * dentry, struct iattr * attr);
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);
int fat_fill_super(struct super_block *sb, void *data, int silent,
struct inode_operations *fs_dir_inode_ops, int isvfat);
-extern int fat_statfs(struct super_block *sb, struct kstatfs *buf);
-extern int 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 *fmt, ...);
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, __le16 *time, __le16 *date);
extern int fat__get_entry(struct inode *dir, loff_t *pos,
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