[PATCH v5 02/25] fsverity: expose ensure_fsverity_info()

[Andrey Albershteyn <aalbersh@kernel.org>]

This function will be used by XFS's scrub to force fsverity activation,
therefore, to read fsverity context.

Signed-off-by: Andrey Albershteyn <aalbersh@kernel.org>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
---
 fs/verity/open.c         | 5 +++--
 include/linux/fsverity.h | 7 +++++++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/fs/verity/open.c b/fs/verity/open.c
index dfa0d1afe0fe..0483db672526 100644
--- a/fs/verity/open.c
+++ b/fs/verity/open.c
@@ -344,7 +344,7 @@ int fsverity_get_descriptor(struct inode *inode,
 	return 0;
 }
 
-static int ensure_verity_info(struct inode *inode)
+int fsverity_ensure_verity_info(struct inode *inode)
 {
 	struct fsverity_info *vi = fsverity_get_info(inode), *found;
 	struct fsverity_descriptor *desc;
@@ -380,12 +380,13 @@ static int ensure_verity_info(struct inode *inode)
 	kfree(desc);
 	return err;
 }
+EXPORT_SYMBOL_GPL(fsverity_ensure_verity_info);
 
 int __fsverity_file_open(struct inode *inode, struct file *filp)
 {
 	if (filp->f_mode & FMODE_WRITE)
 		return -EPERM;
-	return ensure_verity_info(inode);
+	return fsverity_ensure_verity_info(inode);
 }
 EXPORT_SYMBOL_GPL(__fsverity_file_open);
 
diff --git a/include/linux/fsverity.h b/include/linux/fsverity.h
index a8f9aa75b792..8ba7806b225e 100644
--- a/include/linux/fsverity.h
+++ b/include/linux/fsverity.h
@@ -188,6 +188,7 @@ int fsverity_get_digest(struct inode *inode,
 /* open.c */
 
 int __fsverity_file_open(struct inode *inode, struct file *filp);
+int fsverity_ensure_verity_info(struct inode *inode);
 
 /* read_metadata.c */
 
@@ -281,6 +282,12 @@ static inline void fsverity_enqueue_verify_work(struct work_struct *work)
 	WARN_ON_ONCE(1);
 }
 
+static inline int fsverity_ensure_verity_info(struct inode *inode)
+{
+	WARN_ON_ONCE(1);
+	return -EOPNOTSUPP;
+}
+
 #endif	/* !CONFIG_FS_VERITY */
 
 static inline bool fsverity_verify_folio(struct fsverity_info *vi,
-- 
2.51.2