From: Eric Biggers <ebigg...@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.
Reviewed-by: Theodore Ts'o <ty...@mit.edu>
Reviewed-by: Jaegeuk Kim <jaeg...@kernel.org>
Signed-off-by: Eric Biggers <ebigg...@google.com>
---
include/linux/fs.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 56b8e358af5c1..b3a0f5bfb06d7 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;
@@ -1427,6 +1433,9 @@ 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 */
@@ -1965,6 +1974,7 @@ 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
@@ -2006,6 +2016,7 @@ 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
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