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69d75671d9
A user has reported an oops in udf_statfs() that was caused by numOfPartitions entry in LVID structure being corrupted. Fix the problem by verifying whether numOfPartitions makes sense at least to the extent that LVID fits into a single block as it should. Reported-by: Juergen Weigert <jw@suse.com> Signed-off-by: Jan Kara <jack@suse.cz>
184 lines
4.3 KiB
C
184 lines
4.3 KiB
C
#ifndef __LINUX_UDF_SB_H
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#define __LINUX_UDF_SB_H
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#include <linux/mutex.h>
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#include <linux/bitops.h>
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/* Since UDF 2.01 is ISO 13346 based... */
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#define UDF_SUPER_MAGIC 0x15013346
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#define UDF_MAX_READ_VERSION 0x0250
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#define UDF_MAX_WRITE_VERSION 0x0201
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#define UDF_FLAG_USE_EXTENDED_FE 0
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#define UDF_VERS_USE_EXTENDED_FE 0x0200
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#define UDF_FLAG_USE_STREAMS 1
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#define UDF_VERS_USE_STREAMS 0x0200
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#define UDF_FLAG_USE_SHORT_AD 2
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#define UDF_FLAG_USE_AD_IN_ICB 3
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#define UDF_FLAG_USE_FILE_CTIME_EA 4
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#define UDF_FLAG_STRICT 5
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#define UDF_FLAG_UNDELETE 6
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#define UDF_FLAG_UNHIDE 7
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#define UDF_FLAG_VARCONV 8
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#define UDF_FLAG_NLS_MAP 9
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#define UDF_FLAG_UTF8 10
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#define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */
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#define UDF_FLAG_UID_IGNORE 12 /* use sb uid instead of on disk uid */
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#define UDF_FLAG_GID_FORGET 13
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#define UDF_FLAG_GID_IGNORE 14
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#define UDF_FLAG_UID_SET 15
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#define UDF_FLAG_GID_SET 16
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#define UDF_FLAG_SESSION_SET 17
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#define UDF_FLAG_LASTBLOCK_SET 18
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#define UDF_FLAG_BLOCKSIZE_SET 19
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#define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001
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#define UDF_PART_FLAG_UNALLOC_TABLE 0x0002
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#define UDF_PART_FLAG_FREED_BITMAP 0x0004
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#define UDF_PART_FLAG_FREED_TABLE 0x0008
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#define UDF_PART_FLAG_READ_ONLY 0x0010
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#define UDF_PART_FLAG_WRITE_ONCE 0x0020
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#define UDF_PART_FLAG_REWRITABLE 0x0040
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#define UDF_PART_FLAG_OVERWRITABLE 0x0080
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#define UDF_MAX_BLOCK_LOADED 8
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#define UDF_TYPE1_MAP15 0x1511U
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#define UDF_VIRTUAL_MAP15 0x1512U
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#define UDF_VIRTUAL_MAP20 0x2012U
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#define UDF_SPARABLE_MAP15 0x1522U
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#define UDF_METADATA_MAP25 0x2511U
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#define UDF_INVALID_MODE ((umode_t)-1)
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#pragma pack(1) /* XXX(hch): Why? This file just defines in-core structures */
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#define MF_DUPLICATE_MD 0x01
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#define MF_MIRROR_FE_LOADED 0x02
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struct udf_meta_data {
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__u32 s_meta_file_loc;
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__u32 s_mirror_file_loc;
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__u32 s_bitmap_file_loc;
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__u32 s_alloc_unit_size;
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__u16 s_align_unit_size;
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int s_flags;
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struct inode *s_metadata_fe;
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struct inode *s_mirror_fe;
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struct inode *s_bitmap_fe;
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};
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struct udf_sparing_data {
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__u16 s_packet_len;
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struct buffer_head *s_spar_map[4];
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};
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struct udf_virtual_data {
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__u32 s_num_entries;
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__u16 s_start_offset;
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};
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struct udf_bitmap {
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__u32 s_extPosition;
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int s_nr_groups;
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struct buffer_head *s_block_bitmap[0];
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};
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struct udf_part_map {
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union {
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struct udf_bitmap *s_bitmap;
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struct inode *s_table;
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} s_uspace;
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union {
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struct udf_bitmap *s_bitmap;
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struct inode *s_table;
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} s_fspace;
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__u32 s_partition_root;
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__u32 s_partition_len;
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__u16 s_partition_type;
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__u16 s_partition_num;
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union {
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struct udf_sparing_data s_sparing;
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struct udf_virtual_data s_virtual;
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struct udf_meta_data s_metadata;
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} s_type_specific;
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__u32 (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
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__u16 s_volumeseqnum;
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__u16 s_partition_flags;
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};
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#pragma pack()
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struct udf_sb_info {
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struct udf_part_map *s_partmaps;
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__u8 s_volume_ident[32];
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/* Overall info */
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__u16 s_partitions;
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__u16 s_partition;
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/* Sector headers */
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__s32 s_session;
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__u32 s_anchor;
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__u32 s_last_block;
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struct buffer_head *s_lvid_bh;
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/* Default permissions */
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umode_t s_umask;
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kgid_t s_gid;
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kuid_t s_uid;
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umode_t s_fmode;
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umode_t s_dmode;
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/* Lock protecting consistency of above permission settings */
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rwlock_t s_cred_lock;
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/* Root Info */
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struct timespec s_record_time;
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/* Fileset Info */
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__u16 s_serial_number;
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/* highest UDF revision we have recorded to this media */
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__u16 s_udfrev;
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/* Miscellaneous flags */
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unsigned long s_flags;
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/* Encoding info */
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struct nls_table *s_nls_map;
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/* VAT inode */
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struct inode *s_vat_inode;
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struct mutex s_alloc_mutex;
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/* Protected by s_alloc_mutex */
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unsigned int s_lvid_dirty;
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};
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static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
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int udf_compute_nr_groups(struct super_block *sb, u32 partition);
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static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
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{
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return test_bit(flag, &UDF_SB(sb)->s_flags);
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}
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static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
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{
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set_bit(flag, &UDF_SB(sb)->s_flags);
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}
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static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
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{
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clear_bit(flag, &UDF_SB(sb)->s_flags);
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}
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#endif /* __LINUX_UDF_SB_H */
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