On 06/20, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
>
> Analogous to fs/crypto/, add fields to the VFS inode and superblock for
> use by the fs/verity/ support layer:
>
> - ->s_vop: points to the fsverity_operations if the filesystem supports
> fs-verity, otherwise is NULL.
>
> - ->i_verity_info: points to cached fs-verity information for the inode
> after someone opens it, otherwise is NULL.
>
> - S_VERITY: bit in ->i_flags that identifies verity inodes, even when
> they haven't been opened yet and thus still have NULL ->i_verity_info.
>
> Reviewed-by: Theodore Ts'o <tytso@xxxxxxx>
Reviewed-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
> ---
> include/linux/fs.h | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index f7fdfe93e25d3e..a80a192cdcf285 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -64,6 +64,8 @@ struct workqueue_struct;
> struct iov_iter;
> struct fscrypt_info;
> struct fscrypt_operations;
> +struct fsverity_info;
> +struct fsverity_operations;
> struct fs_context;
> struct fs_parameter_description;
>
> @@ -723,6 +725,10 @@ struct inode {
> struct fscrypt_info *i_crypt_info;
> #endif
>
> +#ifdef CONFIG_FS_VERITY
> + struct fsverity_info *i_verity_info;
> +#endif
> +
> void *i_private; /* fs or device private pointer */
> } __randomize_layout;
>
> @@ -1429,6 +1435,9 @@ struct super_block {
> const struct xattr_handler **s_xattr;
> #ifdef CONFIG_FS_ENCRYPTION
> const struct fscrypt_operations *s_cop;
> +#endif
> +#ifdef CONFIG_FS_VERITY
> + const struct fsverity_operations *s_vop;
> #endif
> struct hlist_bl_head s_roots; /* alternate root dentries for NFS */
> struct list_head s_mounts; /* list of mounts; _not_ for fs use */
> @@ -1964,6 +1973,7 @@ struct super_operations {
> #endif
> #define S_ENCRYPTED 16384 /* Encrypted file (using fs/crypto/) */
> #define S_CASEFOLD 32768 /* Casefolded file */
> +#define S_VERITY 65536 /* Verity file (using fs/verity/) */
>
> /*
> * Note that nosuid etc flags are inode-specific: setting some file-system
> @@ -2005,6 +2015,7 @@ static inline bool sb_rdonly(const struct super_block *sb) { return sb->s_flags
> #define IS_DAX(inode) ((inode)->i_flags & S_DAX)
> #define IS_ENCRYPTED(inode) ((inode)->i_flags & S_ENCRYPTED)
> #define IS_CASEFOLDED(inode) ((inode)->i_flags & S_CASEFOLD)
> +#define IS_VERITY(inode) ((inode)->i_flags & S_VERITY)
>
> #define IS_WHITEOUT(inode) (S_ISCHR(inode->i_mode) && \
> (inode)->i_rdev == WHITEOUT_DEV)
> --
> 2.22.0.410.gd8fdbe21b5-goog
