NAME

       rpma_flush - initiate the flush operation

SYNOPSIS

             #include <librpma.h>

             struct rpma_conn;
             struct rpma_mr_remote;
             enum rpma_flush_type {
                     RPMA_FLUSH_TYPE_PERSISTENT,
                     RPMA_FLUSH_TYPE_VISIBILITY,
             };

             int rpma_flush(struct rpma_conn *conn,
                             struct rpma_mr_remote *dst, size_t dst_offset,
                             size_t len, enum rpma_flush_type type, int flags,
                             const void *op_context);

DESCRIPTION

       rpma_flush()  initiates  the  flush  operation  (finalizing  a  transfer  of  data to the remote memory).
       Possible types of rpma_flush() operation:

       •  RPMA_FLUSH_TYPE_PERSISTENT - flush data down to the persistent domain

       •  RPMA_FLUSH_TYPE_VISIBILITY - flush data deep enough to make it visible on the remote node

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

ERRORS

       rpma_flush() can fail with the following errors:

       •  RPMA_E_INVAL - conn or dst is NULL

       •  RPMA_E_INVAL - unknown type value

       •  RPMA_E_INVAL - flags are not set

       •  RPMA_E_PROVIDER - ibv_post_send(3) failed

       •  RPMA_E_NOSUPP - type is RPMA_FLUSH_TYPE_PERSISTENT and the direct write to pmem is not supported

SEE ALSO

       rpma_conn_req_connect(3), rpma_mr_remote_from_descriptor(3), librpma(7) and https://pmem.io/rpma/

RPMA                                              01 April 2024                                    rpma_flush(3)