static void osd_object_read_lock(const struct lu_env *env,
struct dt_object *dt, unsigned role)
{
struct osd_object *obj = osd_dt_obj(dt);
LASSERT(osd_invariant(obj));
down_read_nested(&obj->oo_sem, role);
}
/**
* Implementation of dt_object_operations::do_read_lock
*
* osp_md_object_{read,write}_lock() will only lock the remote object in the
* local cache, which uses the semaphore (opo_sem) inside the osp_object to
* lock the object. Note: it will not lock the object in the whole cluster,
* which relies on the LDLM lock.
*
* \param[in] env execution environment
* \param[in] dt object to be locked
* \param[in] role lock role from MDD layer, see mdd_object_role().
*/
static void osp_md_object_read_lock(const struct lu_env *env,
struct dt_object *dt, unsigned role)
{
struct osp_object *obj = dt2osp_obj(dt);
LASSERT(obj->opo_owner != env);
down_read_nested(&obj->opo_sem, role);
LASSERT(obj->opo_owner == NULL);
}
