udf_sb.h

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#ifndef __LINUX_UDF_SB_H
#define __LINUX_UDF_SB_H

#include <linux/mutex.h>
#include <linux/bitops.h>

/* Since UDF 2.01 is ISO 13346 based... */
#define UDF_SUPER_MAGIC         0x15013346

#define UDF_MAX_READ_VERSION        0x0250
#define UDF_MAX_WRITE_VERSION       0x0201

#define UDF_FLAG_USE_EXTENDED_FE    0
#define UDF_VERS_USE_EXTENDED_FE    0x0200
#define UDF_FLAG_USE_STREAMS        1
#define UDF_VERS_USE_STREAMS        0x0200
#define UDF_FLAG_USE_SHORT_AD       2
#define UDF_FLAG_USE_AD_IN_ICB      3
#define UDF_FLAG_USE_FILE_CTIME_EA  4
#define UDF_FLAG_STRICT         5
#define UDF_FLAG_UNDELETE       6
#define UDF_FLAG_UNHIDE         7
#define UDF_FLAG_VARCONV        8
#define UDF_FLAG_NLS_MAP        9
#define UDF_FLAG_UTF8           10
#define UDF_FLAG_UID_FORGET     11    /* save -1 for uid to disk */
#define UDF_FLAG_UID_IGNORE     12    /* use sb uid instead of on disk uid */
#define UDF_FLAG_GID_FORGET     13
#define UDF_FLAG_GID_IGNORE     14
#define UDF_FLAG_UID_SET    15
#define UDF_FLAG_GID_SET    16
#define UDF_FLAG_SESSION_SET    17
#define UDF_FLAG_LASTBLOCK_SET  18
#define UDF_FLAG_BLOCKSIZE_SET  19

#define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
#define UDF_PART_FLAG_UNALLOC_TABLE 0x0002
#define UDF_PART_FLAG_FREED_BITMAP  0x0004
#define UDF_PART_FLAG_FREED_TABLE   0x0008
#define UDF_PART_FLAG_READ_ONLY     0x0010
#define UDF_PART_FLAG_WRITE_ONCE    0x0020
#define UDF_PART_FLAG_REWRITABLE    0x0040
#define UDF_PART_FLAG_OVERWRITABLE  0x0080

#define UDF_MAX_BLOCK_LOADED    8

#define UDF_TYPE1_MAP15         0x1511U
#define UDF_VIRTUAL_MAP15       0x1512U
#define UDF_VIRTUAL_MAP20       0x2012U
#define UDF_SPARABLE_MAP15      0x1522U
#define UDF_METADATA_MAP25      0x2511U

#define UDF_INVALID_MODE        ((umode_t)-1)

#pragma pack(1) /* XXX(hch): Why?  This file just defines in-core structures */

#define MF_DUPLICATE_MD     0x01
#define MF_MIRROR_FE_LOADED 0x02

struct udf_meta_data {
    __u32   s_meta_file_loc;
    __u32   s_mirror_file_loc;
    __u32   s_bitmap_file_loc;
    __u32   s_alloc_unit_size;
    __u16   s_align_unit_size;
    int s_flags;
    struct inode *s_metadata_fe;
    struct inode *s_mirror_fe;
    struct inode *s_bitmap_fe;
};

struct udf_sparing_data {
    __u16   s_packet_len;
    struct buffer_head *s_spar_map[4];
};

struct udf_virtual_data {
    __u32   s_num_entries;
    __u16   s_start_offset;
};

struct udf_bitmap {
    __u32           s_extLength;
    __u32           s_extPosition;
    __u16           s_nr_groups;
    struct buffer_head  **s_block_bitmap;
};

struct udf_part_map {
    union {
        struct udf_bitmap   *s_bitmap;
        struct inode        *s_table;
    } s_uspace;
    union {
        struct udf_bitmap   *s_bitmap;
        struct inode        *s_table;
    } s_fspace;
    __u32   s_partition_root;
    __u32   s_partition_len;
    __u16   s_partition_type;
    __u16   s_partition_num;
    union {
        struct udf_sparing_data s_sparing;
        struct udf_virtual_data s_virtual;
        struct udf_meta_data s_metadata;
    } s_type_specific;
    __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
    __u16   s_volumeseqnum;
    __u16   s_partition_flags;
};

#pragma pack()

struct udf_sb_info {
    struct udf_part_map *s_partmaps;
    __u8            s_volume_ident[32];

    /* Overall info */
    __u16           s_partitions;
    __u16           s_partition;

    /* Sector headers */
    __s32           s_session;
    __u32           s_anchor;
    __u32           s_last_block;

    struct buffer_head  *s_lvid_bh;

    /* Default permissions */
    umode_t         s_umask;
    kgid_t          s_gid;
    kuid_t          s_uid;
    umode_t         s_fmode;
    umode_t         s_dmode;
    /* Lock protecting consistency of above permission settings */
    rwlock_t        s_cred_lock;

    /* Root Info */
    struct timespec     s_record_time;

    /* Fileset Info */
    __u16           s_serial_number;

    /* highest UDF revision we have recorded to this media */
    __u16           s_udfrev;

    /* Miscellaneous flags */
    unsigned long       s_flags;

    /* Encoding info */
    struct nls_table    *s_nls_map;

    /* VAT inode */
    struct inode        *s_vat_inode;

    struct mutex        s_alloc_mutex;
    /* Protected by s_alloc_mutex */
    unsigned int        s_lvid_dirty;
};

static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
{
    return sb->s_fs_info;
}

struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);

int udf_compute_nr_groups(struct super_block *sb, u32 partition);

static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
{
    return test_bit(flag, &UDF_SB(sb)->s_flags);
}

static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
{
    set_bit(flag, &UDF_SB(sb)->s_flags);
}

static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
{
    clear_bit(flag, &UDF_SB(sb)->s_flags);
}

#endif /* __LINUX_UDF_SB_H */