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rpma_recv(3) | RPMA Programmer's Manual | rpma_recv(3) |
NAME¶
rpma_recv - initiate the receive operationSYNOPSIS¶
#include <librpma.h> struct rpma_conn; struct rpma_mr_local; int rpma_recv(struct rpma_conn *conn, struct rpma_mr_local *dst, size_t offset, size_t len, const void *op_context);
DESCRIPTION¶
rpma_recv() initiates the receive operation which prepares a buffer for a message sent from other side of the connection. Please see rpma_send(3).All buffers prepared via rpma_recv(3) form an unordered set. When a message arrives it is placed in one of the buffers awaitaning and a completion for the receive operation is generated.
A buffer for an incoming message have to be prepared beforehand.
The order of buffers in the set does not affect the order of completions of receive operations get via rpma_conn_completion_get(3).
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
NOTE¶
In the RDMA standard, receive requests form an ordered queue. The RPMA does NOT inherit this guarantee.RETURN VALUE¶
The rpma_recv() function returns 0 on success or a negative error code on failure.ERRORS¶
rpma_recv() can fail with the following errors:- RPMA_E_INVAL - conn or src is NULL
- RPMA_E_PROVIDER - ibv_post_recv(3) failed
SEE ALSO¶
rpma_conn_req_connect(3), rpma_mr_reg(3), librpma(7) and https://pmem.io/rpma/21 October 2020 | RPMA |