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rpma_flush(3) RPMA Programmer's Manual rpma_flush(3)

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

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/
21 October 2020 RPMA