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rdma_post_recv(3) [centos man page]

RDMA_POST_RECV(3)					   Librdmacm Programmer's Manual					 RDMA_POST_RECV(3)

NAME
rdma_post_recv - post a work request to receive an incoming message. SYNOPSIS
#include <rdma/rdma_verbs.h> int rdma_post_recv (struct rdma_cm_id *id, void *context, void *addr, size_t length, struct ibv_mr *mr); 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 A registered memory region associated with the posted buffer. DESCRIPTION
Posts a work request to the receive queue of the queue pair associated with the rdma_cm_id. The posted buffer 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 a receive buffer is posted and large enough to contain all sent data before the peer posts the corresponding send message. The message buffer must have been registered before being posted, with the mr parameter referencing the regis- tration. The buffer 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 allocated 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 ALSO
rdma_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_recvv(3), rdma_post_send(3) librdmacm 2010-07-19 RDMA_POST_RECV(3)

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RDMA_POST_WRITE(3)					   Librdmacm Programmer's Manual					RDMA_POST_WRITE(3)

NAME
rdma_post_write - post an RDMA write work request. SYNOPSIS
#include <rdma/rdma_verbs.h> int rdma_post_write (struct rdma_cm_id *id, void *context, void *addr, size_t length, struct ibv_mr *mr, int flags, uint64_t remote_addr, uint32_t rkey); ARGUMENTS
id A reference to a communication identifier where the request will be posted. context User-defined context associated with the request. addr The local address of the source of the write request. length The length of the write operation. mr Optional memory region associated with the local buffer. flags Optional flags used to control the write operation. remote_addr The address of the remote registered memory to write into. rkey The registered memory key associated with the remote address. DESCRIPTION
Posts a work request to the send queue of the queue pair associated with the rdma_cm_id. The contents of the local data buffer will be writen into the remote memory region. RETURN VALUE
Returns 0 on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason. NOTES
For a list of supported flags, see ibv_post_send. Unless inline data is specified, the local data buffer must have been registered before the write is issued, and the buffer must remain registered until the write completes. The remote buffer must always be registered. Write 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 write 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_writev(3), rdma_reg_write(3), rdma_reg_msgs(3) librdmacm 2010-07-19 RDMA_POST_WRITE(3)

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