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_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
  59 struct 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
  76 struct udf_sparing_data {
  77         __u16   s_packet_len;
  78         struct buffer_head *s_spar_map[4];
  79 };
  80
  81 struct udf_virtual_data {
  82         __u32   s_num_entries;
  83         __u16   s_start_offset;
  84 };
  85
  86 struct udf_bitmap {
  87         __u32                   s_extPosition;
  88         int                     s_nr_groups;
  89         struct buffer_head      *s_block_bitmap[0];
  90 };
  91
  92 struct 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
 117 struct 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
 164 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 165 {
 166         return sb->s_fs_info;
 167 }
 168
 169 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
 170
 171 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 172
 173 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
 174 {
 175         return test_bit(flag, &UDF_SB(sb)->s_flags);
 176 }
 177
 178 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
 179 {
 180         set_bit(flag, &UDF_SB(sb)->s_flags);
 181 }
 182
 183 static 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 */