fs/udf/udf_sb.h

   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 /*
  10  * Even UDF 2.6 media should have version <= 0x250 but apparently there are
  11  * some broken filesystems with version set to 0x260. Accommodate those.
  12  */
  13 #define UDF_MAX_READ_VERSION            0x0260
  14 #define UDF_MAX_WRITE_VERSION           0x0201
  15
  16 #define UDF_FLAG_USE_EXTENDED_FE        0
  17 #define UDF_VERS_USE_EXTENDED_FE        0x0200
  18 #define UDF_FLAG_USE_STREAMS            1
  19 #define UDF_VERS_USE_STREAMS            0x0200
  20 #define UDF_FLAG_USE_SHORT_AD           2
  21 #define UDF_FLAG_USE_AD_IN_ICB          3
  22 #define UDF_FLAG_USE_FILE_CTIME_EA      4
  23 #define UDF_FLAG_STRICT                 5
  24 #define UDF_FLAG_UNDELETE               6
  25 #define UDF_FLAG_UNHIDE                 7
  26 #define UDF_FLAG_NOVRS                  8
  27 #define UDF_FLAG_UID_FORGET     11    /* save -1 for uid to disk */
  28 #define UDF_FLAG_GID_FORGET     12
  29 #define UDF_FLAG_UID_SET        13
  30 #define UDF_FLAG_GID_SET        14
  31 #define UDF_FLAG_SESSION_SET    15
  32 #define UDF_FLAG_LASTBLOCK_SET  16
  33 #define UDF_FLAG_BLOCKSIZE_SET  17
  34 #define UDF_FLAG_INCONSISTENT   18
  35 #define UDF_FLAG_RW_INCOMPAT    19      /* Set when we find RW incompatible
  36                                          * feature */
  37
  38 #define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
  39 #define UDF_PART_FLAG_UNALLOC_TABLE     0x0002
  40 #define UDF_PART_FLAG_READ_ONLY         0x0010
  41 #define UDF_PART_FLAG_WRITE_ONCE        0x0020
  42 #define UDF_PART_FLAG_REWRITABLE        0x0040
  43 #define UDF_PART_FLAG_OVERWRITABLE      0x0080
  44
  45 #define UDF_MAX_BLOCK_LOADED    8
  46
  47 #define UDF_TYPE1_MAP15                 0x1511U
  48 #define UDF_VIRTUAL_MAP15               0x1512U
  49 #define UDF_VIRTUAL_MAP20               0x2012U
  50 #define UDF_SPARABLE_MAP15              0x1522U
  51 #define UDF_METADATA_MAP25              0x2511U
  52
  53 #define UDF_INVALID_MODE                ((umode_t)-1)
  54
  55 #define MF_DUPLICATE_MD         0x01
  56 #define MF_MIRROR_FE_LOADED     0x02
  57
  58 #define EFSCORRUPTED EUCLEAN
  59
  60 struct udf_meta_data {
  61         __u32   s_meta_file_loc;
  62         __u32   s_mirror_file_loc;
  63         __u32   s_bitmap_file_loc;
  64         __u32   s_alloc_unit_size;
  65         __u16   s_align_unit_size;
  66         /*
  67          * Partition Reference Number of the associated physical / sparable
  68          * partition
  69          */
  70         __u16   s_phys_partition_ref;
  71         int     s_flags;
  72         struct inode *s_metadata_fe;
  73         struct inode *s_mirror_fe;
  74         struct inode *s_bitmap_fe;
  75 };
  76
  77 struct udf_sparing_data {
  78         __u16   s_packet_len;
  79         struct buffer_head *s_spar_map[4];
  80 };
  81
  82 struct udf_virtual_data {
  83         __u32   s_num_entries;
  84         __u16   s_start_offset;
  85 };
  86
  87 struct udf_bitmap {
  88         __u32                   s_extPosition;
  89         int                     s_nr_groups;
  90         struct buffer_head      *s_block_bitmap[] __counted_by(s_nr_groups);
  91 };
  92
  93 struct udf_part_map {
  94         union {
  95                 struct udf_bitmap       *s_bitmap;
  96                 struct inode            *s_table;
  97         } s_uspace;
  98         __u32   s_partition_root;
  99         __u32   s_partition_len;
 100         __u16   s_partition_type;
 101         __u16   s_partition_num;
 102         union {
 103                 struct udf_sparing_data s_sparing;
 104                 struct udf_virtual_data s_virtual;
 105                 struct udf_meta_data s_metadata;
 106         } s_type_specific;
 107         __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
 108         __u16   s_volumeseqnum;
 109         __u16   s_partition_flags;
 110 };
 111
 112 #pragma pack()
 113
 114 struct udf_sb_info {
 115         struct udf_part_map     *s_partmaps;
 116         __u8                    s_volume_ident[32];
 117
 118         /* Overall info */
 119         __u16                   s_partitions;
 120         __u16                   s_partition;
 121
 122         /* Sector headers */
 123         __s32                   s_session;
 124         __u32                   s_anchor;
 125         __u32                   s_last_block;
 126
 127         struct buffer_head      *s_lvid_bh;
 128
 129         /* Default permissions */
 130         umode_t                 s_umask;
 131         kgid_t                  s_gid;
 132         kuid_t                  s_uid;
 133         umode_t                 s_fmode;
 134         umode_t                 s_dmode;
 135         /* Lock protecting consistency of above permission settings */
 136         rwlock_t                s_cred_lock;
 137
 138         /* Root Info */
 139         struct timespec64       s_record_time;
 140
 141         /* Fileset Info */
 142         __u16                   s_serial_number;
 143
 144         /* highest UDF revision we have recorded to this media */
 145         __u16                   s_udfrev;
 146
 147         /* Miscellaneous flags */
 148         unsigned long           s_flags;
 149
 150         /* Encoding info */
 151         struct nls_table        *s_nls_map;
 152
 153         /* VAT inode */
 154         struct inode            *s_vat_inode;
 155
 156         struct mutex            s_alloc_mutex;
 157         /* Protected by s_alloc_mutex */
 158         unsigned int            s_lvid_dirty;
 159 };
 160
 161 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 162 {
 163         return sb->s_fs_info;
 164 }
 165
 166 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
 167
 168 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 169
 170 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
 171 {
 172         return test_bit(flag, &UDF_SB(sb)->s_flags);
 173 }
 174
 175 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
 176 {
 177         set_bit(flag, &UDF_SB(sb)->s_flags);
 178 }
 179
 180 static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
 181 {
 182         clear_bit(flag, &UDF_SB(sb)->s_flags);
 183 }
 184
 185 #endif /* __LINUX_UDF_SB_H */