vfs: Add permission2 for filesystems with per mount permissions

This allows filesystems to use their mount private data to
influence the permssions they return in permission2. It has
been separated into a new call to avoid disrupting current
permission users.

Change-Id: I9d416e3b8b6eca84ef3e336bd2af89ddd51df6ca
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
diff --git a/security/inode.c b/security/inode.c
index 43ce6e1..94466a5 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -105,7 +105,7 @@
 	dir = parent->d_inode;
 
 	mutex_lock(&dir->i_mutex);
-	dentry = lookup_one_len(name, parent, strlen(name));
+	dentry = lookup_one_len2(name, mount, parent, strlen(name));
 	if (IS_ERR(dentry))
 		goto out;