`rdma_join_multicast_ex` ( 3 )

присоединяется к группе многоадресной рассылки с расширенными параметрами (Joins a multicast group with extended options.)

Имя (Name)

rdma_join_multicast_ex - Joins a multicast group with extended
       options.

Синопсис (Synopsis)

#include <rdma/rdma_cma.h>

       int rdma_join_multicast_ex (struct rdma_cm_id *id, struct
       rdma_cm_join_mc_attr_ex *mc_join_attr, void *context);

Аргументы (Arguments)

id Communication identifier associated with the request.

mc_join_attr Is an rdma_cm_join_mc_attr_ex struct, as defined in <rdma/rdma_cma.h>.

context User-defined context associated with the join request.

Описание (Description)

Joins a multicast group (MCG) with extended options.  Currently
       supporting MC join with a specified join flag.

       struct rdma_cm_join_mc_attr_ex {
               uint32_t                comp_mask;      /* Bitwise OR between "rdma_cm_join_mc_attr_mask" enum */
               uint32_t                join_flags;     /* Use a single flag from "rdma_cm_mc_join_flags" enum */
               struct sockaddr         *addr;          /* Multicast address identifying the group to join */
       };

       The supported join flags are:

       RDMA_MC_JOIN_FLAG_FULLMEMBER - Create multicast group, Send
       multicast messages to MCG, Receive multicast messages from MCG.

       RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER - Create multicast group,
       Send multicast messages to MCG, Don't receive multicast messages
       from MCG (send-only).

       Initiating a MC join as "Send Only Full Member" on InfiniBand
       requires SM support, otherwise joining will fail.

       Initiating a MC join as "Send Only Full Member" on RoCEv2/ETH
       will not send any IGMP messages unlike a Full Member MC join.
       When "Send Only Full Member" is used the QP will not be attached
       to the MCG.

Возвращаемое значение (Return value)

Returns 0 on success, or -1 on error.  If an error occurs, errno
       will be set to indicate the failure reason.

Примечание (Note)

Before joining a multicast group, the rdma_cm_id must be bound to
       an RDMA device by calling rdma_bind_addr or rdma_resolve_addr.
       Use of rdma_resolve_addr requires the local routing tables to
       resolve the multicast address to an RDMA device, unless a
       specific source address is provided.  The user must call
       rdma_leave_multicast to leave the multicast group and release any
       multicast resources.  After the join operation completes, if a QP
       is associated with the rdma_cm_id, it is automatically attached
       to the multicast group when the multicast event is retrieved by
       the user.  Otherwise, the user is responsible for calling
       ibv_attach_mcast to bind the QP to the multicast group.  The join
       context is returned to the user through the private_data field in
       the rdma_cm_event.

Смотри также (See also)

rdma_join_multicast(3), rdma_leave_multicast(3),
       rdma_bind_addr(3), rdma_resolve_addr(3), rdma_create_qp(3),
       rdma_get_cm_event(3)

Исходный текст на man7.org

rdma_join_multicast_ex ( 3 )