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