diff options
Diffstat (limited to 'fs/overlayfs/ovl_entry.h')
| -rw-r--r-- | fs/overlayfs/ovl_entry.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h index 28348c44ea5b..8d81e88f1d1e 100644 --- a/fs/overlayfs/ovl_entry.h +++ b/fs/overlayfs/ovl_entry.h @@ -27,6 +27,7 @@ struct ovl_sb { }; struct ovl_layer { + /* ovl_free_fs() relies on @mnt being the first member! */ struct vfsmount *mnt; /* Trap in ovl inode cache */ struct inode *trap; @@ -37,6 +38,14 @@ struct ovl_layer { int fsid; }; +/* + * ovl_free_fs() relies on @mnt being the first member when unmounting + * the private mounts created for each layer. Let's check both the + * offset and type. + */ +static_assert(offsetof(struct ovl_layer, mnt) == 0); +static_assert(__same_type(typeof_member(struct ovl_layer, mnt), struct vfsmount *)); + struct ovl_path { struct ovl_layer *layer; struct dentry *dentry; |