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d16076d9b6
Add new support code for iterating directory entries. The code is also more carefully verifying validity of on-disk directory entries to avoid crashes on malicious media. Signed-off-by: Jan Kara <jack@suse.cz>
286 lines
9.9 KiB
C
286 lines
9.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __UDF_DECL_H
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#define __UDF_DECL_H
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#define pr_fmt(fmt) "UDF-fs: " fmt
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#include "ecma_167.h"
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#include "osta_udf.h"
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/buffer_head.h>
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#include <linux/udf_fs_i.h>
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#include "udf_sb.h"
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#include "udfend.h"
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#include "udf_i.h"
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#define UDF_DEFAULT_PREALLOC_BLOCKS 8
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extern __printf(3, 4) void _udf_err(struct super_block *sb,
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const char *function, const char *fmt, ...);
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#define udf_err(sb, fmt, ...) \
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_udf_err(sb, __func__, fmt, ##__VA_ARGS__)
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extern __printf(3, 4) void _udf_warn(struct super_block *sb,
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const char *function, const char *fmt, ...);
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#define udf_warn(sb, fmt, ...) \
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_udf_warn(sb, __func__, fmt, ##__VA_ARGS__)
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#define udf_info(fmt, ...) \
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pr_info("INFO " fmt, ##__VA_ARGS__)
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#define udf_debug(fmt, ...) \
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pr_debug("%s:%d:%s: " fmt, __FILE__, __LINE__, __func__, ##__VA_ARGS__)
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#define udf_fixed_to_variable(x) ( ( ( (x) >> 5 ) * 39 ) + ( (x) & 0x0000001F ) )
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#define udf_variable_to_fixed(x) ( ( ( (x) / 39 ) << 5 ) + ( (x) % 39 ) )
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#define UDF_EXTENT_LENGTH_MASK 0x3FFFFFFF
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#define UDF_EXTENT_FLAG_MASK 0xC0000000
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#define UDF_INVALID_ID ((uint32_t)-1)
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#define UDF_NAME_PAD 4
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#define UDF_NAME_LEN 254
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#define UDF_NAME_LEN_CS0 255
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static inline size_t udf_file_entry_alloc_offset(struct inode *inode)
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{
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struct udf_inode_info *iinfo = UDF_I(inode);
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if (iinfo->i_use)
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return sizeof(struct unallocSpaceEntry);
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else if (iinfo->i_efe)
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return sizeof(struct extendedFileEntry) + iinfo->i_lenEAttr;
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else
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return sizeof(struct fileEntry) + iinfo->i_lenEAttr;
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}
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static inline size_t udf_ext0_offset(struct inode *inode)
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{
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if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
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return udf_file_entry_alloc_offset(inode);
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else
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return 0;
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}
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/* computes tag checksum */
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u8 udf_tag_checksum(const struct tag *t);
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typedef uint32_t udf_pblk_t;
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struct dentry;
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struct inode;
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struct task_struct;
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struct buffer_head;
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struct super_block;
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extern const struct export_operations udf_export_ops;
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extern const struct inode_operations udf_dir_inode_operations;
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extern const struct file_operations udf_dir_operations;
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extern const struct inode_operations udf_file_inode_operations;
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extern const struct file_operations udf_file_operations;
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extern const struct inode_operations udf_symlink_inode_operations;
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extern const struct address_space_operations udf_aops;
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extern const struct address_space_operations udf_adinicb_aops;
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extern const struct address_space_operations udf_symlink_aops;
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struct udf_fileident_iter {
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struct inode *dir; /* Directory we are working with */
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loff_t pos; /* Logical position in a dir */
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struct buffer_head *bh[2]; /* Buffer containing 'pos' and possibly
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* next buffer if entry straddles
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* blocks */
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struct kernel_lb_addr eloc; /* Start of extent containing 'pos' */
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uint32_t elen; /* Length of extent containing 'pos' */
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sector_t loffset; /* Block offset of 'pos' within above
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* extent */
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struct extent_position epos; /* Position after the above extent */
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struct fileIdentDesc fi; /* Copied directory entry */
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uint8_t *name; /* Pointer to entry name */
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uint8_t namebuf[UDF_NAME_LEN_CS0]; /* Storage for entry name in case
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* the name is split between two blocks
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*/
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};
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struct udf_fileident_bh {
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struct buffer_head *sbh;
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struct buffer_head *ebh;
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int soffset;
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int eoffset;
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};
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struct udf_vds_record {
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uint32_t block;
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uint32_t volDescSeqNum;
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};
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struct generic_desc {
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struct tag descTag;
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__le32 volDescSeqNum;
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};
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/* super.c */
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static inline void udf_updated_lvid(struct super_block *sb)
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{
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struct buffer_head *bh = UDF_SB(sb)->s_lvid_bh;
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BUG_ON(!bh);
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WARN_ON_ONCE(((struct logicalVolIntegrityDesc *)
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bh->b_data)->integrityType !=
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cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN));
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UDF_SB(sb)->s_lvid_dirty = 1;
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}
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extern u64 lvid_get_unique_id(struct super_block *sb);
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struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
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u32 meta_file_loc, u32 partition_num);
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/* namei.c */
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extern int udf_write_fi(struct inode *inode, struct fileIdentDesc *,
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struct fileIdentDesc *, struct udf_fileident_bh *,
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uint8_t *, uint8_t *);
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static inline unsigned int udf_dir_entry_len(struct fileIdentDesc *cfi)
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{
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return ALIGN(sizeof(struct fileIdentDesc) +
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le16_to_cpu(cfi->lengthOfImpUse) + cfi->lengthFileIdent,
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UDF_NAME_PAD);
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}
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static inline uint8_t *udf_get_fi_ident(struct fileIdentDesc *fi)
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{
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return ((uint8_t *)(fi + 1)) + le16_to_cpu(fi->lengthOfImpUse);
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}
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/* file.c */
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extern long udf_ioctl(struct file *, unsigned int, unsigned long);
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/* inode.c */
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extern struct inode *__udf_iget(struct super_block *, struct kernel_lb_addr *,
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bool hidden_inode);
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static inline struct inode *udf_iget_special(struct super_block *sb,
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struct kernel_lb_addr *ino)
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{
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return __udf_iget(sb, ino, true);
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}
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static inline struct inode *udf_iget(struct super_block *sb,
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struct kernel_lb_addr *ino)
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{
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return __udf_iget(sb, ino, false);
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}
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extern int udf_expand_file_adinicb(struct inode *);
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extern struct buffer_head *udf_expand_dir_adinicb(struct inode *inode,
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udf_pblk_t *block, int *err);
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extern struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block,
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int create, int *err);
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extern int udf_setsize(struct inode *, loff_t);
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extern void udf_evict_inode(struct inode *);
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extern int udf_write_inode(struct inode *, struct writeback_control *wbc);
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extern udf_pblk_t udf_block_map(struct inode *inode, sector_t block);
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extern int8_t inode_bmap(struct inode *, sector_t, struct extent_position *,
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struct kernel_lb_addr *, uint32_t *, sector_t *);
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extern int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block,
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struct extent_position *epos);
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extern int __udf_add_aext(struct inode *inode, struct extent_position *epos,
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struct kernel_lb_addr *eloc, uint32_t elen, int inc);
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extern int udf_add_aext(struct inode *, struct extent_position *,
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struct kernel_lb_addr *, uint32_t, int);
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extern void udf_write_aext(struct inode *, struct extent_position *,
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struct kernel_lb_addr *, uint32_t, int);
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extern int8_t udf_delete_aext(struct inode *, struct extent_position);
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extern int8_t udf_next_aext(struct inode *, struct extent_position *,
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struct kernel_lb_addr *, uint32_t *, int);
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extern int8_t udf_current_aext(struct inode *, struct extent_position *,
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struct kernel_lb_addr *, uint32_t *, int);
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extern void udf_update_extra_perms(struct inode *inode, umode_t mode);
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/* misc.c */
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extern struct buffer_head *udf_tgetblk(struct super_block *sb,
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udf_pblk_t block);
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extern struct buffer_head *udf_tread(struct super_block *sb, udf_pblk_t block);
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extern struct genericFormat *udf_add_extendedattr(struct inode *, uint32_t,
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uint32_t, uint8_t);
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extern struct genericFormat *udf_get_extendedattr(struct inode *, uint32_t,
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uint8_t);
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extern struct buffer_head *udf_read_tagged(struct super_block *, uint32_t,
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uint32_t, uint16_t *);
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extern struct buffer_head *udf_read_ptagged(struct super_block *,
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struct kernel_lb_addr *, uint32_t,
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uint16_t *);
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extern void udf_update_tag(char *, int);
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extern void udf_new_tag(char *, uint16_t, uint16_t, uint16_t, uint32_t, int);
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/* lowlevel.c */
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extern unsigned int udf_get_last_session(struct super_block *);
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extern unsigned long udf_get_last_block(struct super_block *);
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/* partition.c */
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extern uint32_t udf_get_pblock(struct super_block *, uint32_t, uint16_t,
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uint32_t);
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extern uint32_t udf_get_pblock_virt15(struct super_block *, uint32_t, uint16_t,
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uint32_t);
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extern uint32_t udf_get_pblock_virt20(struct super_block *, uint32_t, uint16_t,
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uint32_t);
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extern uint32_t udf_get_pblock_spar15(struct super_block *, uint32_t, uint16_t,
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uint32_t);
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extern uint32_t udf_get_pblock_meta25(struct super_block *, uint32_t, uint16_t,
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uint32_t);
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extern int udf_relocate_blocks(struct super_block *, long, long *);
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static inline uint32_t
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udf_get_lb_pblock(struct super_block *sb, struct kernel_lb_addr *loc,
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uint32_t offset)
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{
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return udf_get_pblock(sb, loc->logicalBlockNum,
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loc->partitionReferenceNum, offset);
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}
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/* unicode.c */
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extern int udf_get_filename(struct super_block *, const uint8_t *, int,
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uint8_t *, int);
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extern int udf_put_filename(struct super_block *, const uint8_t *, int,
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uint8_t *, int);
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extern int udf_dstrCS0toChar(struct super_block *, uint8_t *, int,
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const uint8_t *, int);
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/* ialloc.c */
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extern void udf_free_inode(struct inode *);
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extern struct inode *udf_new_inode(struct inode *, umode_t);
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/* truncate.c */
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extern void udf_truncate_tail_extent(struct inode *);
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extern void udf_discard_prealloc(struct inode *);
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extern int udf_truncate_extents(struct inode *);
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/* balloc.c */
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extern void udf_free_blocks(struct super_block *, struct inode *,
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struct kernel_lb_addr *, uint32_t, uint32_t);
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extern int udf_prealloc_blocks(struct super_block *, struct inode *, uint16_t,
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uint32_t, uint32_t);
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extern udf_pblk_t udf_new_block(struct super_block *sb, struct inode *inode,
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uint16_t partition, uint32_t goal, int *err);
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/* directory.c */
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int udf_fiiter_init(struct udf_fileident_iter *iter, struct inode *dir,
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loff_t pos);
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int udf_fiiter_advance(struct udf_fileident_iter *iter);
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void udf_fiiter_release(struct udf_fileident_iter *iter);
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void udf_fiiter_write_fi(struct udf_fileident_iter *iter, uint8_t *impuse);
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extern struct fileIdentDesc *udf_fileident_read(struct inode *, loff_t *,
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struct udf_fileident_bh *,
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struct fileIdentDesc *,
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struct extent_position *,
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struct kernel_lb_addr *, uint32_t *,
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sector_t *);
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extern struct fileIdentDesc *udf_get_fileident(void *buffer, int bufsize,
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int *offset);
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extern struct long_ad *udf_get_filelongad(uint8_t *, int, uint32_t *, int);
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extern struct short_ad *udf_get_fileshortad(uint8_t *, int, uint32_t *, int);
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/* udftime.c */
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extern void udf_disk_stamp_to_time(struct timespec64 *dest,
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struct timestamp src);
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extern void udf_time_to_disk_stamp(struct timestamp *dest, struct timespec64 src);
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#endif /* __UDF_DECL_H */
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