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#ifndef _MSDOS_FS_SB
#define _MSDOS_FS_SB

/*
 * MS-DOS file system in-core superblock data
 */

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_CACHE_NR    8 /* number of FAT cache */

struct fat_cache {
        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 */
};

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 clusters;      /* number of clusters */
        unsigned long root_cluster;  /* first cluster of the root directory */
        unsigned long fsinfo_sector; /* FAT32 fsinfo offset from start of disk */
        struct semaphore fat_lock;
        int prev_free;               /* previously returned free 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 cache_lock;
        struct fat_cache cache_array[FAT_CACHE_NR], *cache;
};

#endif