rpma_send(3)

rpma_send - initiate the send operation

Section 3 librpma-dev bookworm source

Description

rpma_send

NAME

rpma_send - initiate the send operation

SYNOPSIS

#include <librpma.h>

struct rpma_conn;
struct rpma_mr_local;
int rpma_send(struct rpma_conn *conn, const struct rpma_mr_local *src, size_t offset,
size_t len, int flags, const void *op_context);

DESCRIPTION

rpma_send() initiates the send operation which transfers a message from the local memory to other side of the connection. To send a 0 byte message, set src to NULL and both 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_send() function returns 0 on success or a negative error code on failure.

ERRORS

rpma_send() can fail with the following errors:

	•		RPMA_E_INVAL - conn == NULL \|\| flags == 0
	•		RPMA_E_INVAL - src == NULL && (offset != 0 \|\| len != 0)
	•		RPMA_E_PROVIDER - ibv_post_send(3) failed