/** Import an MM struct
* @author Renaud Lottiaux
*
* @param obj_entry Object entry of the object to import.
* @param _buffer Data to import in the object.
*/
int mm_import_object (struct rpc_desc *desc,
struct kddm_set *_set,
struct kddm_obj *obj_entry,
objid_t objid,
int flags)
{
struct mm_struct *mm;
krgsyms_val_t unmap_id, get_unmap_id;
struct kddm_set *set;
unique_id_t mm_id, kddm_id;
void *context_vdso;
int r;
mm = obj_entry->object;
r = rpc_unpack (desc, 0, &mm_id, sizeof(unique_id_t));
if (r)
return r;
r = rpc_unpack (desc, 0, &kddm_id, sizeof(unique_id_t));
if (r)
return r;
r = rpc_unpack (desc, 0, &context_vdso, sizeof(void*));
if (r)
return r;
if (mm == NULL) {
/* First import */
set = _find_get_kddm_set(kddm_def_ns, kddm_id);
BUG_ON (set == NULL);
mm = set->obj_set;
mm->mm_id = mm_id;
atomic_inc(&mm->mm_users);
obj_entry->object = mm;
put_kddm_set(set);
mm->context.vdso = context_vdso;
}
r = rpc_unpack(desc, 0, &mm->copyset, sizeof(krgnodemask_t));
if (r)
return r;
r = rpc_unpack_type(desc, get_unmap_id);
if (r)
return r;
mm->get_unmapped_area = krgsyms_import (get_unmap_id);
r = rpc_unpack_type(desc, unmap_id);
if (r)
return r;
mm->unmap_area = krgsyms_import (unmap_id);
return 0;
}
void *kddm_get_object(struct kddm_ns *ns, kddm_set_id_t set_id, objid_t objid)
{
struct kddm_set *set;
void *obj;
set = _find_get_kddm_set (ns, set_id);
obj = generic_kddm_get_object(set, objid, 0);
put_kddm_set(set);
return obj;
}
void *kddm_get_object_no_lock(struct kddm_ns *ns, kddm_set_id_t set_id,
objid_t objid)
{
struct kddm_set *set;
void *obj;
set = _find_get_kddm_set (ns, set_id);
obj = generic_kddm_get_object(set, objid, KDDM_NO_FREEZE);
put_kddm_set(set);
return obj;
}
void *kddm_try_grab_object(struct kddm_ns *ns, kddm_set_id_t set_id,
objid_t objid)
{
struct kddm_set *set;
void *obj;
set = _find_get_kddm_set (ns, set_id);
obj = generic_kddm_grab_object(set, objid, KDDM_TRY_GRAB);
put_kddm_set(set);
return obj;
}
void *async_kddm_grab_object(struct kddm_ns *ns, kddm_set_id_t set_id,
objid_t objid)
{
struct kddm_set *set;
void *obj;
set = _find_get_kddm_set (ns, set_id);
obj = generic_kddm_grab_object(set, objid, KDDM_ASYNC_REQ);
put_kddm_set(set);
return obj;
}
void *fkddm_grab_object(struct kddm_ns *ns, kddm_set_id_t set_id,
objid_t objid, int flags)
{
struct kddm_set *set;
void *obj;
set = _find_get_kddm_set (ns, set_id);
obj = generic_kddm_grab_object(set, objid, flags);
put_kddm_set(set);
return obj;
}
int kddm_set_object(struct kddm_ns *ns, kddm_set_id_t set_id, objid_t objid,
void *object)
{
struct kddm_set *set;
int res;
set = _find_get_kddm_set (ns, set_id);
res = _kddm_set_object_state(set, objid, object, WRITE_OWNER);
put_kddm_set(set);
return res;
}
void *kddm_get_object_manual_ft(struct kddm_ns *ns, kddm_set_id_t set_id,
objid_t objid)
{
struct kddm_set *set;
void *obj;
set = _find_get_kddm_set (ns, set_id);
obj = generic_kddm_get_object(set, objid, KDDM_NO_FT_REQ |
KDDM_SEND_OWNERSHIP);
put_kddm_set(set);
return obj;
}
