RDMA_POST_RECVV(3) Librdmacm Programmer's Manual RDMA_POST_RECVV(3)NAMErdma_post_recvv - post a work request to receive incoming messages.
SYNOPSIS
#include <rdma/rdma_verbs.h>
int rdma_post_recvv (struct rdma_cm_id *id, void *context, struct
ibv_sge *sgl, int nsge);
ARGUMENTS
id A reference to a communication identifier where the message
buffer(s) will be posted.
context User-defined context associated with the request.
sgl A scatter-gather list of memory buffers posted as a single
request.
nsge The number of scatter-gather entries in the sgl array.
DESCRIPTION
Posts a single work request to the receive queue of the queue pair
associated with the rdma_cm_id. The posted buffers will be queued to
receive an incoming message sent by the remote peer.
RETURN VALUE
Returns 0 on success, or -1 on error. If an error occurs, errno will
be set to indicate the failure reason.
NOTES
The user is responsible for ensuring that the receive is posted, and
the total buffer space is large enough to contain all sent data before
the peer posts the corresponding send message. The message buffers
must have been registered before being posted, and the buffers must
remain registered until the receive completes.
Messages may be posted to an rdma_cm_id only after a queue pair has
been associated with it. A queue pair is bound to an rdma_cm_id after
calling rdma_create_ep or rdma_create_qp, if the rdma_cm_id is allo‐
cated using rdma_create_id.
The user-defined context associated with the receive request will be
returned to the user through the work completion wr_id, work request
identifier, field.
SEE ALSOrdma_cm(7), rdma_create_id(3), rdma_create_ep(3), rdma_create_qp(3),
rdma_reg_read(3), ibv_reg_mr(3), ibv_dereg_mr(3), rdma_post_recv(3),
rdma_post_send(3)librdmacm 2010-07-19 RDMA_POST_RECVV(3)
