diff mbox series

[v4,06/16] fs-verity: add inode and superblock fields

Message ID 20190606155205.2872-7-ebiggers@kernel.org (mailing list archive)
State New, archived
Headers show
Series fs-verity: read-only file-based authenticity protection | expand

Commit Message

Eric Biggers June 6, 2019, 3:51 p.m. UTC 
From: Eric Biggers <ebiggers@google.com>

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.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 include/linux/fs.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

Comments

Theodore Ts'o June 15, 2019, 12:57 p.m. UTC | #1 
On Thu, Jun 06, 2019 at 08:51:55AM -0700, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@google.com>
> 
> 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.
> 
> Signed-off-by: Eric Biggers <ebiggers@google.com>

Looks good; you can add:

Reviewed-off-by: Theodore Ts'o <tytso@mit.edu>

						- Ted
diff mbox series

Patch

diff --git a/include/linux/fs.h b/include/linux/fs.h
index f7fdfe93e25d..a80a192cdcf2 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)