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