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| author | Liu Bo <bo.li.liu@oracle.com> | 2017-08-19 00:15:18 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-08-21 18:47:42 +0300 |
| commit | 167ce953ca55bdee20fe56c3c0fa51002435f745 (patch) | |
| tree | b85800ec47dd67e42d969c6c53a0257bae58c8a1 /fs/btrfs/ctree.h | |
| parent | af1cbe0a66cb9e6c3f2acf7f0a7fc647b5dc4f2f (diff) | |
| download | linux-167ce953ca55bdee20fe56c3c0fa51002435f745.tar.xz | |
Btrfs: add a helper to retrive extent inline ref type
An invalid value of extent inline ref type may be read from a
malicious image which may force btrfs to crash.
This adds a helper which does sanity check for the ref type, so we can
know if it's sane, return he type, otherwise return an error.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ minimal tweak const types, causing warnings due to other cleanup patches ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index ca087ad5ac48..542db9d0dbcd 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2567,6 +2567,17 @@ static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) /* extent-tree.c */ +enum btrfs_inline_ref_type { + BTRFS_REF_TYPE_INVALID = 0, + BTRFS_REF_TYPE_BLOCK = 1, + BTRFS_REF_TYPE_DATA = 2, + BTRFS_REF_TYPE_ANY = 3, +}; + +int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, + struct btrfs_extent_inline_ref *iref, + enum btrfs_inline_ref_type is_data); + u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, |