ovl: allocate an ovl_inode struct

We need some more space to store overlay inode data in memory,
so allocate overlay inodes from a slab of struct ovl_inode.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h
index 34bc4a9f5c61..553727df886c 100644
--- a/fs/overlayfs/ovl_entry.h
+++ b/fs/overlayfs/ovl_entry.h
@@ -58,3 +58,12 @@ static inline struct dentry *ovl_upperdentry_dereference(struct ovl_entry *oe)
 {
 	return lockless_dereference(oe->__upperdentry);
 }
+
+struct ovl_inode {
+	struct inode vfs_inode;
+};
+
+static inline struct ovl_inode *OVL_I(struct inode *inode)
+{
+	return container_of(inode, struct ovl_inode, vfs_inode);
+}