RDMA_POST_WRITEV(3) Librdmacm Programmer's Manual RDMA_POST_WRITEV(3)NAMErdma_post_writev - post an RDMA write work request.
SYNOPSIS
#include <rdma/rdma_verbs.h>
int rdma_post_writev (struct rdma_cm_id *id, void *context, struct
ibv_sge *sgl, int nsge, 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.
sgl A scatter-gather list of the source buffers of the write.
nsge The number of scatter-gather array entries.
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 buffers 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 buffers must have been registered before
the write is issued, and the buffers must remain registered until the
write completes. The remote buffers must always be registered.
Write operations may not be posted to an rdma_cm_id or the correspond‐
ing 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 ALSOrdma_cm(7), rdma_connect(3), rdma_accept(3), ibv_post_send(3),
rdma_post_write(3), rdma_reg_write(3), rdma_reg_msgs(3)librdmacm 2010-07-19 RDMA_POST_WRITEV(3)
