auto_mount
int auto_mount = 0;
auto_mount = 0;
auto_mount = vfs_matchops(dvp->v_vfsp,
if (auto_mount && (error == 0) && (mvp != dvp)) {
static int auto_mount(vfs_t *, vnode_t *, struct mounta *, cred_t *);
VFSNAME_MOUNT, { .vfs_mount = auto_mount },