[PATCH v8 03/22] ovl: use core fsverity ensure info interface

[Andrey Albershteyn <aalbersh@kernel.org>]

fsverity now exposes fsverity_ensure_verity_info() which could be used
instead of opening file to ensure that fsverity info is loaded and
attached to inode.

Signed-off-by: Andrey Albershteyn <aalbersh@kernel.org>
Acked-by: Amir Goldstein <amir73il@gmail.com>
---
 fs/overlayfs/util.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index 2ea769f311c3..dd2e81022e4f 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -16,6 +16,7 @@
 #include <linux/namei.h>
 #include <linux/ratelimit.h>
 #include <linux/overflow.h>
+#include <linux/fsverity.h>
 #include "overlayfs.h"
 
 /* Get write access to upper mnt - may fail if upper sb was remounted ro */
@@ -1377,18 +1378,9 @@ char *ovl_get_redirect_xattr(struct ovl_fs *ofs, const struct path *path, int pa
 int ovl_ensure_verity_loaded(const struct path *datapath)
 {
 	struct inode *inode = d_inode(datapath->dentry);
-	struct file *filp;
 
-	if (!fsverity_active(inode) && IS_VERITY(inode)) {
-		/*
-		 * If this inode was not yet opened, the verity info hasn't been
-		 * loaded yet, so we need to do that here to force it into memory.
-		 */
-		filp = kernel_file_open(datapath, O_RDONLY, current_cred());
-		if (IS_ERR(filp))
-			return PTR_ERR(filp);
-		fput(filp);
-	}
+	if (fsverity_active(inode))
+		return fsverity_ensure_verity_info(inode);
 
 	return 0;
 }
-- 
2.51.2