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d1d3fcb324
Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct udf_bitmap. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Jan Kara <jack@suse.com> Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Jan Kara <jack@suse.cz> Message-Id: <20230915201404.never.574-kees@kernel.org>
185 lines
4.3 KiB
C
185 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#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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#include <linux/magic.h>
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/*
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* Even UDF 2.6 media should have version <= 0x250 but apparently there are
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* some broken filesystems with version set to 0x260. Accommodate those.
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*/
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#define UDF_MAX_READ_VERSION 0x0260
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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_UID_FORGET 11 /* save -1 for uid to disk */
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#define UDF_FLAG_GID_FORGET 12
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#define UDF_FLAG_UID_SET 13
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#define UDF_FLAG_GID_SET 14
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#define UDF_FLAG_SESSION_SET 15
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#define UDF_FLAG_LASTBLOCK_SET 16
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#define UDF_FLAG_BLOCKSIZE_SET 17
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#define UDF_FLAG_INCONSISTENT 18
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#define UDF_FLAG_RW_INCOMPAT 19 /* Set when we find RW incompatible
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* feature */
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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_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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#define MF_DUPLICATE_MD 0x01
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#define MF_MIRROR_FE_LOADED 0x02
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#define EFSCORRUPTED EUCLEAN
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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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/*
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* Partition Reference Number of the associated physical / sparable
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* partition
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*/
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__u16 s_phys_partition_ref;
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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[] __counted_by(s_nr_groups);
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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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__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 timespec64 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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