diff options
Diffstat (limited to 'fs/udf/udf_sb.h')
| -rw-r--r-- | fs/udf/udf_sb.h | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h new file mode 100644 index 0000000000..9af6ff7f97 --- /dev/null +++ b/fs/udf/udf_sb.h @@ -0,0 +1,184 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_UDF_SB_H +#define __LINUX_UDF_SB_H + +#include <linux/mutex.h> +#include <linux/bitops.h> +#include <linux/magic.h> + +/* + * Even UDF 2.6 media should have version <= 0x250 but apparently there are + * some broken filesystems with version set to 0x260. Accommodate those. + */ +#define UDF_MAX_READ_VERSION 0x0260 +#define UDF_MAX_WRITE_VERSION 0x0201 + +#define UDF_FLAG_USE_EXTENDED_FE 0 +#define UDF_VERS_USE_EXTENDED_FE 0x0200 +#define UDF_FLAG_USE_STREAMS 1 +#define UDF_VERS_USE_STREAMS 0x0200 +#define UDF_FLAG_USE_SHORT_AD 2 +#define UDF_FLAG_USE_AD_IN_ICB 3 +#define UDF_FLAG_USE_FILE_CTIME_EA 4 +#define UDF_FLAG_STRICT 5 +#define UDF_FLAG_UNDELETE 6 +#define UDF_FLAG_UNHIDE 7 +#define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */ +#define UDF_FLAG_GID_FORGET 12 +#define UDF_FLAG_UID_SET 13 +#define UDF_FLAG_GID_SET 14 +#define UDF_FLAG_SESSION_SET 15 +#define UDF_FLAG_LASTBLOCK_SET 16 +#define UDF_FLAG_BLOCKSIZE_SET 17 +#define UDF_FLAG_INCONSISTENT 18 +#define UDF_FLAG_RW_INCOMPAT 19 /* Set when we find RW incompatible + * feature */ + +#define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001 +#define UDF_PART_FLAG_UNALLOC_TABLE 0x0002 +#define UDF_PART_FLAG_READ_ONLY 0x0010 +#define UDF_PART_FLAG_WRITE_ONCE 0x0020 +#define UDF_PART_FLAG_REWRITABLE 0x0040 +#define UDF_PART_FLAG_OVERWRITABLE 0x0080 + +#define UDF_MAX_BLOCK_LOADED 8 + +#define UDF_TYPE1_MAP15 0x1511U +#define UDF_VIRTUAL_MAP15 0x1512U +#define UDF_VIRTUAL_MAP20 0x2012U +#define UDF_SPARABLE_MAP15 0x1522U +#define UDF_METADATA_MAP25 0x2511U + +#define UDF_INVALID_MODE ((umode_t)-1) + +#define MF_DUPLICATE_MD 0x01 +#define MF_MIRROR_FE_LOADED 0x02 + +#define EFSCORRUPTED EUCLEAN + +struct udf_meta_data { + __u32 s_meta_file_loc; + __u32 s_mirror_file_loc; + __u32 s_bitmap_file_loc; + __u32 s_alloc_unit_size; + __u16 s_align_unit_size; + /* + * Partition Reference Number of the associated physical / sparable + * partition + */ + __u16 s_phys_partition_ref; + int s_flags; + struct inode *s_metadata_fe; + struct inode *s_mirror_fe; + struct inode *s_bitmap_fe; +}; + +struct udf_sparing_data { + __u16 s_packet_len; + struct buffer_head *s_spar_map[4]; +}; + +struct udf_virtual_data { + __u32 s_num_entries; + __u16 s_start_offset; +}; + +struct udf_bitmap { + __u32 s_extPosition; + int s_nr_groups; + struct buffer_head *s_block_bitmap[]; +}; + +struct udf_part_map { + union { + struct udf_bitmap *s_bitmap; + struct inode *s_table; + } s_uspace; + __u32 s_partition_root; + __u32 s_partition_len; + __u16 s_partition_type; + __u16 s_partition_num; + union { + struct udf_sparing_data s_sparing; + struct udf_virtual_data s_virtual; + struct udf_meta_data s_metadata; + } s_type_specific; + __u32 (*s_partition_func)(struct super_block *, __u32, __u16, __u32); + __u16 s_volumeseqnum; + __u16 s_partition_flags; +}; + +#pragma pack() + +struct udf_sb_info { + struct udf_part_map *s_partmaps; + __u8 s_volume_ident[32]; + + /* Overall info */ + __u16 s_partitions; + __u16 s_partition; + + /* Sector headers */ + __s32 s_session; + __u32 s_anchor; + __u32 s_last_block; + + struct buffer_head *s_lvid_bh; + + /* Default permissions */ + umode_t s_umask; + kgid_t s_gid; + kuid_t s_uid; + umode_t s_fmode; + umode_t s_dmode; + /* Lock protecting consistency of above permission settings */ + rwlock_t s_cred_lock; + + /* Root Info */ + struct timespec64 s_record_time; + + /* Fileset Info */ + __u16 s_serial_number; + + /* highest UDF revision we have recorded to this media */ + __u16 s_udfrev; + + /* Miscellaneous flags */ + unsigned long s_flags; + + /* Encoding info */ + struct nls_table *s_nls_map; + + /* VAT inode */ + struct inode *s_vat_inode; + + struct mutex s_alloc_mutex; + /* Protected by s_alloc_mutex */ + unsigned int s_lvid_dirty; +}; + +static inline struct udf_sb_info *UDF_SB(struct super_block *sb) +{ + return sb->s_fs_info; +} + +struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb); + +int udf_compute_nr_groups(struct super_block *sb, u32 partition); + +static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag) +{ + return test_bit(flag, &UDF_SB(sb)->s_flags); +} + +static inline void UDF_SET_FLAG(struct super_block *sb, int flag) +{ + set_bit(flag, &UDF_SB(sb)->s_flags); +} + +static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag) +{ + clear_bit(flag, &UDF_SB(sb)->s_flags); +} + +#endif /* __LINUX_UDF_SB_H */ |