root/fs/udf/udf_sb.h

INCLUDED FROM

DEFINITIONS

1. UDF_SB

#ifndef __LINUX_UDF_SB_H
#define __LINUX_UDF_SB_H

#include <linux/mutex.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_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

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

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;
        __u8    s_dup_md_flag;
        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[3];
        __u32                   s_last_block;

        struct buffer_head      *s_lvid_bh;

        /* Default permissions */
        mode_t                  s_umask;
        gid_t                   s_gid;
        uid_t                   s_uid;

        /* 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 */
        __u32                   s_flags;

        /* Encoding info */
        struct nls_table        *s_nls_map;

        /* VAT inode */
        struct inode            *s_vat_inode;

        struct mutex            s_alloc_mutex;
};

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);

#define UDF_QUERY_FLAG(X,Y)                     ( UDF_SB(X)->s_flags & ( 1 << (Y) ) )
#define UDF_SET_FLAG(X,Y)                       ( UDF_SB(X)->s_flags |= ( 1 << (Y) ) )
#define UDF_CLEAR_FLAG(X,Y)                     ( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) )

#endif /* __LINUX_UDF_SB_H */