отправить запрос на чтение RDMA (post an RDMA read work request.)
Имя (Name)
rdma_post_readv - post an RDMA read work request.
Синопсис (Synopsis)
#include <rdma/rdma_verbs.h>
int rdma_post_readv (struct rdma_cm_id *id, void *context, struct
ibv_sge *sgl, int nsge, int flags, uint64_t remote_addr, uint32_t
rkey);
Аргументы (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 destination buffers of
the read.
nsge The number of scatter-gather array entries.
flags Optional flags used to control the read operation.
remote_addr The address of the remote registered memory to read
from.
rkey The registered memory key associated with the remote
address.
Описание (Description)
Posts a work request to the send queue of the queue pair
associated with the rdma_cm_id. The contents of the remote
memory region will be read into the local data buffers.
Возвращаемое значение (Return value)
Returns 0 on success, or -1 on error. If an error occurs, errno
will be set to indicate the failure reason.
Примечание (Note)
For a list of supported flags, see ibv_post_send. Both the
remote and local data buffers must have been registered before
the read is issued, and the buffers must remain registered until
the read completes.
Read 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 read request will be
returned to the user through the work completion wr_id, work
request identifier, field.
Смотри также (See also)
rdma_cm(7), rdma_connect(3), rdma_accept(3), ibv_post_send(3),
rdma_post_read(3), rdma_reg_read(3), rdma_reg_msgs(3)
