[RFC PATCH 06/11] xfs: initialize fs-verity on file open and cleanup on inode destruction

[Andrey Albershteyn <aalbersh@redhat.com>]

fs-verity will read and attach metadata (not the tree itself) from
a disk for those inodes which already have fs-verity enabled.

Signed-off-by: Andrey Albershteyn <aalbersh@redhat.com>
---
 fs/xfs/xfs_file.c  | 8 ++++++++
 fs/xfs/xfs_super.c | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 242165580e682..5eadd9a37c50e 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -32,6 +32,7 @@
 #include <linux/mman.h>
 #include <linux/fadvise.h>
 #include <linux/mount.h>
+#include <linux/fsverity.h>
 
 static const struct vm_operations_struct xfs_file_vm_ops;
 
@@ -1170,9 +1171,16 @@ xfs_file_open(
 	struct inode	*inode,
 	struct file	*file)
 {
+	int		error = 0;
+
 	if (xfs_is_shutdown(XFS_M(inode->i_sb)))
 		return -EIO;
 	file->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC | FMODE_BUF_WASYNC;
+
+	error = fsverity_file_open(inode, file);
+	if (error)
+		return error;
+
 	return generic_file_open(inode, file);
 }
 
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 8f1e9b9ed35d9..50c2c819ba940 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -45,6 +45,7 @@
 #include <linux/magic.h>
 #include <linux/fs_context.h>
 #include <linux/fs_parser.h>
+#include <linux/fsverity.h>
 
 static const struct super_operations xfs_super_operations;
 
@@ -647,6 +648,7 @@ xfs_fs_destroy_inode(
 	ASSERT(!rwsem_is_locked(&inode->i_rwsem));
 	XFS_STATS_INC(ip->i_mount, vn_rele);
 	XFS_STATS_INC(ip->i_mount, vn_remove);
+	fsverity_cleanup_inode(inode);
 	xfs_inode_mark_reclaimable(ip);
 }
 
-- 
2.31.1