diff options
| author | Jan Kara <jack@suse.cz> | 2022-10-03 23:33:22 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2023-01-09 10:39:51 +0100 |
| commit | d16076d9b684b7c8d3ccbe9c33d5ea9fe8fcca09 (patch) | |
| tree | 3163337d34a6aba157326bc30bdb09a1b0599de9 /fs/udf/udfdecl.h | |
| parent | 3d2d7e61553dbcc8ba45201d8ae4f383742c8202 (diff) | |
udf: New directory iteration code
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>
Diffstat (limited to 'fs/udf/udfdecl.h')
| -rw-r--r-- | fs/udf/udfdecl.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h index 7e258f15b8ef..22a8466e335c 100644 --- a/fs/udf/udfdecl.h +++ b/fs/udf/udfdecl.h @@ -86,6 +86,24 @@ extern const struct address_space_operations udf_aops; extern const struct address_space_operations udf_adinicb_aops; extern const struct address_space_operations udf_symlink_aops; +struct udf_fileident_iter { + struct inode *dir; /* Directory we are working with */ + loff_t pos; /* Logical position in a dir */ + struct buffer_head *bh[2]; /* Buffer containing 'pos' and possibly + * next buffer if entry straddles + * blocks */ + struct kernel_lb_addr eloc; /* Start of extent containing 'pos' */ + uint32_t elen; /* Length of extent containing 'pos' */ + sector_t loffset; /* Block offset of 'pos' within above + * extent */ + struct extent_position epos; /* Position after the above extent */ + struct fileIdentDesc fi; /* Copied directory entry */ + uint8_t *name; /* Pointer to entry name */ + uint8_t namebuf[UDF_NAME_LEN_CS0]; /* Storage for entry name in case + * the name is split between two blocks + */ +}; + struct udf_fileident_bh { struct buffer_head *sbh; struct buffer_head *ebh; @@ -243,6 +261,11 @@ extern udf_pblk_t udf_new_block(struct super_block *sb, struct inode *inode, uint16_t partition, uint32_t goal, int *err); /* directory.c */ +int udf_fiiter_init(struct udf_fileident_iter *iter, struct inode *dir, + loff_t pos); +int udf_fiiter_advance(struct udf_fileident_iter *iter); +void udf_fiiter_release(struct udf_fileident_iter *iter); +void udf_fiiter_write_fi(struct udf_fileident_iter *iter, uint8_t *impuse); extern struct fileIdentDesc *udf_fileident_read(struct inode *, loff_t *, struct udf_fileident_bh *, struct fileIdentDesc *, |