source: vendor/current/librpc/idl/file_id.idl

[
        pointer_default(unique)
]
interface file_id
{
        typedef [public] struct {
                /* we don't use SMB_DEV_T and SMB_INO_T as we want a fixed size here,
                   and we may be using file system specific code to fill in something
                   other than a dev_t for the device */
                udlong devid;
                udlong inode;
                udlong extid; /* Support systems that use an extended id (e.g. snapshots). */
        } file_id;
}