SIMPLE SOLUTIONS

RDMA_JOIN_MULTICAST(3) - Linux man page online | Library functions

Joins a multicast group.

Chapter
2008-01-02
RDMA_JOIN_MULTICAST(3) Librdmacm Programmer's Manual RDMA_JOIN_MULTICAST(3)

NAME

rdma_join_multicast - Joins a multicast group.

SYNOPSIS

#include <rdma/rdma_cma.h> int rdma_join_multicast (struct rdma_cm_id *id, struct sockaddr *addr, void *context);

ARGUMENTS

id Communication identifier associated with the request. addr Multicast address identifying the group to join. context User-defined context associated with the join request.

DESCRIPTION

Joins a multicast group and attaches an associated QP to the group.

RETURN VALUE

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

NOTES

Before joining a multicast group, the rdma_cm_id must be bound to an RDMA device by call‐ ing 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 multi‐ cast 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.

SEE ALSO

rdma_leave_multicast(3), rdma_bind_addr(3), rdma_resolve_addr(3), rdma_create_qp(3), rdma_get_cm_event(3)
librdmacm 2008-01-02 RDMA_JOIN_MULTICAST(3)
This manual Reference Other manuals
rdma_join_multicast(3) referred by rdma_cm(7) | rdma_get_cm_event(3) | rdma_join_multicast_ex(3) | rdma_leave_multicast(3)
refer to rdma_bind_addr(3) | rdma_create_qp(3) | rdma_get_cm_event(3) | rdma_leave_multicast(3) | rdma_resolve_addr(3)
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