NAME¶
rdma_post_send - post a work request to send a message.
SYNOPSIS¶
#include <rdma/rdma_verbs.h>
int rdma_post_send (struct rdma_cm_id *id, void
*context, void *addr, size_t
length, struct ibv_mr *mr, int
flags);
ARGUMENTS¶
- id
- A reference to a communication identifier where the message buffer will be
posted.
- context
- User-defined context associated with the request.
- addr
- The address of the memory buffer to post.
- length
- The length of the memory buffer.
- mr
- Optional registered memory region associated with the posted buffer.
- flags
- Optional flags used to control the send operation.
DESCRIPTION¶
Posts a work request to the send queue of the queue pair associated with the
rdma_cm_id. The contents of the posted buffer will be sent to the remote peer
of a connection.
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 remote peer has queued a receive
request before issuing the send operations. For a list of supported flags, see
ibv_post_send. Unless the send request is using inline data, the message
buffer must have been registered before being posted, with the mr parameter
referencing the registration. The buffer must remain registered until the send
completes.
Send operations may not be posted to an rdma_cm_id or the corresponding queue
pair until it has been connected.
The user-defined context associated with the send request will be returned to
the user through the work completion wr_id, work request identifier, field.
SEE ALSO¶
rdma_cm(7),
rdma_connect(3),
rdma_accept(3),
ibv_post_send(3),
rdma_post_sendv(3),
rdma_post_recv(3)