LXR linux/fs/udf/udf

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __LINUX_UDF_SB_H
   3#define __LINUX_UDF_SB_H
   4
   5#include <linux/mutex.h>
   6#include <linux/bitops.h>
   7#include <linux/magic.h>
   8
   9#define UDF_MAX_READ_VERSION            0x0250
  10#define UDF_MAX_WRITE_VERSION           0x0201
  11
  12#define UDF_FLAG_USE_EXTENDED_FE        0
  13#define UDF_VERS_USE_EXTENDED_FE        0x0200
  14#define UDF_FLAG_USE_STREAMS            1
  15#define UDF_VERS_USE_STREAMS            0x0200
  16#define UDF_FLAG_USE_SHORT_AD           2
  17#define UDF_FLAG_USE_AD_IN_ICB          3
  18#define UDF_FLAG_USE_FILE_CTIME_EA      4
  19#define UDF_FLAG_STRICT                 5
  20#define UDF_FLAG_UNDELETE               6
  21#define UDF_FLAG_UNHIDE                 7
  22#define UDF_FLAG_VARCONV                8
  23#define UDF_FLAG_NLS_MAP                9
  24#define UDF_FLAG_UTF8                   10
  25#define UDF_FLAG_UID_FORGET     11    /* save -1 for uid to disk */
  26#define UDF_FLAG_UID_IGNORE     12    /* use sb uid instead of on disk uid */
  27#define UDF_FLAG_GID_FORGET     13
  28#define UDF_FLAG_GID_IGNORE     14
  29#define UDF_FLAG_UID_SET        15
  30#define UDF_FLAG_GID_SET        16
  31#define UDF_FLAG_SESSION_SET    17
  32#define UDF_FLAG_LASTBLOCK_SET  18
  33#define UDF_FLAG_BLOCKSIZE_SET  19
  34
  35#define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
  36#define UDF_PART_FLAG_UNALLOC_TABLE     0x0002
  37#define UDF_PART_FLAG_FREED_BITMAP      0x0004
  38#define UDF_PART_FLAG_FREED_TABLE       0x0008
  39#define UDF_PART_FLAG_READ_ONLY         0x0010
  40#define UDF_PART_FLAG_WRITE_ONCE        0x0020
  41#define UDF_PART_FLAG_REWRITABLE        0x0040
  42#define UDF_PART_FLAG_OVERWRITABLE      0x0080
  43
  44#define UDF_MAX_BLOCK_LOADED    8
  45
  46#define UDF_TYPE1_MAP15                 0x1511U
  47#define UDF_VIRTUAL_MAP15               0x1512U
  48#define UDF_VIRTUAL_MAP20               0x2012U
  49#define UDF_SPARABLE_MAP15              0x1522U
  50#define UDF_METADATA_MAP25              0x2511U
  51
  52#define UDF_INVALID_MODE                ((umode_t)-1)
  53
  54#pragma pack(1) /* XXX(hch): Why?  This file just defines in-core structures */
  55
  56#define MF_DUPLICATE_MD         0x01
  57#define MF_MIRROR_FE_LOADED     0x02
  58
  59struct udf_meta_data {
  60        __u32   s_meta_file_loc;
  61        __u32   s_mirror_file_loc;
  62        __u32   s_bitmap_file_loc;
  63        __u32   s_alloc_unit_size;
  64        __u16   s_align_unit_size;
  65        /*
  66         * Partition Reference Number of the associated physical / sparable
  67         * partition
  68         */
  69        __u16   s_phys_partition_ref;
  70        int     s_flags;
  71        struct inode *s_metadata_fe;
  72        struct inode *s_mirror_fe;
  73        struct inode *s_bitmap_fe;
  74};
  75
  76struct udf_sparing_data {
  77        __u16   s_packet_len;
  78        struct buffer_head *s_spar_map[4];
  79};
  80
  81struct udf_virtual_data {
  82        __u32   s_num_entries;
  83        __u16   s_start_offset;
  84};
  85
  86struct udf_bitmap {
  87        __u32                   s_extPosition;
  88        int                     s_nr_groups;
  89        struct buffer_head      *s_block_bitmap[0];
  90};
  91
  92struct udf_part_map {
  93        union {
  94                struct udf_bitmap       *s_bitmap;
  95                struct inode            *s_table;
  96        } s_uspace;
  97        union {
  98                struct udf_bitmap       *s_bitmap;
  99                struct inode            *s_table;
 100        } s_fspace;
 101        __u32   s_partition_root;
 102        __u32   s_partition_len;
 103        __u16   s_partition_type;
 104        __u16   s_partition_num;
 105        union {
 106                struct udf_sparing_data s_sparing;
 107                struct udf_virtual_data s_virtual;
 108                struct udf_meta_data s_metadata;
 109        } s_type_specific;
 110        __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
 111        __u16   s_volumeseqnum;
 112        __u16   s_partition_flags;
 113};
 114
 115#pragma pack()
 116
 117struct udf_sb_info {
 118        struct udf_part_map     *s_partmaps;
 119        __u8                    s_volume_ident[32];
 120
 121        /* Overall info */
 122        __u16                   s_partitions;
 123        __u16                   s_partition;
 124
 125        /* Sector headers */
 126        __s32                   s_session;
 127        __u32                   s_anchor;
 128        __u32                   s_last_block;
 129
 130        struct buffer_head      *s_lvid_bh;
 131
 132        /* Default permissions */
 133        umode_t                 s_umask;
 134        kgid_t                  s_gid;
 135        kuid_t                  s_uid;
 136        umode_t                 s_fmode;
 137        umode_t                 s_dmode;
 138        /* Lock protecting consistency of above permission settings */
 139        rwlock_t                s_cred_lock;
 140
 141        /* Root Info */
 142        struct timespec         s_record_time;
 143
 144        /* Fileset Info */
 145        __u16                   s_serial_number;
 146
 147        /* highest UDF revision we have recorded to this media */
 148        __u16                   s_udfrev;
 149
 150        /* Miscellaneous flags */
 151        unsigned long           s_flags;
 152
 153        /* Encoding info */
 154        struct nls_table        *s_nls_map;
 155
 156        /* VAT inode */
 157        struct inode            *s_vat_inode;
 158
 159        struct mutex            s_alloc_mutex;
 160        /* Protected by s_alloc_mutex */
 161        unsigned int            s_lvid_dirty;
 162};
 163
 164static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 165{
 166        return sb->s_fs_info;
 167}
 168
 169struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
 170
 171int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 172
 173static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
 174{
 175        return test_bit(flag, &UDF_SB(sb)->s_flags);
 176}
 177
 178static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
 179{
 180        set_bit(flag, &UDF_SB(sb)->s_flags);
 181}
 182
 183static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
 184{
 185        clear_bit(flag, &UDF_SB(sb)->s_flags);
 186}
 187
 188#endif /* __LINUX_UDF_SB_H */
 189