rpma_write3

Usage

      #include <librpma.h>
      struct rpma_conn;
      struct rpma_mr_local;
      struct rpma_mr_remote;
      int rpma_write(struct rpma_conn *conn,
                      struct rpma_mr_remote *dst, size_t dst_offset,
                      const struct rpma_mr_local *src, size_t src_offset,
                      size_t len, int flags, const void *op_context);

Overview

rpma_write() initiates transferring data from the local memory to the remote memory. To write a 0 bytes message, set src and dst to NULL and src_offset, dst_offset and len to 0.

The attribute flags set the completion notification indicator:

•

RPMA_F_COMPLETION_ON_ERROR - generate the completion on error

•

RPMA_F_COMPLETION_ALWAYS - generate the completion regardless of result of the operation.

op_context is returned in the wr_id field of the completion (struct ibv_wc).

Return value

The rpma_write() function returns 0 on success or a negative error code on failure.

Errors

rpma_write() can fail with the following errors:

•

RPMA_E_INVAL - conn == NULL || flags == 0

•

RPMA_E_INVAL - dst == NULL && (src != NULL || src_offset != 0 || dst_offset != 0 || len != 0)

•

RPMA_E_INVAL - src == NULL && (dst != NULL || src_offset != 0 || dst_offset != 0 || len != 0)

•

RPMA_E_PROVIDER - ibv_post_send(3) failed