Man page - rdma_set_option(3)

Packages contas this manual

Package: librdmacm-dev
apt-get install librdmacm-dev

Manuals in package:

Documentations in package:

RDMA_SET_OPTION(3)

Librdmacm Programmer's Manual

RDMA_SET_OPTION(3)

rdma_set_option - Set communication options for an rdma_cm_id.

#include <rdma/rdma_cma.h>

int rdma_set_option (struct rdma_cm_id *id, int level, int optname, void *optval, size_t optlen);

id: RDMA identifier.
level: Protocol level of the option to set.
optname: Name of the option, relative to the level, to set.
optval: Reference to the option data. The data is dependent on the level and optname.
optlen: The size of the %optval buffer.

Sets communication options for an rdma_cm_id. This call is used to override the default system settings.

optname can be one of
RDMA_OPTION_ID_TOS: Specify the quality of service provided by a connection. The expected optlen is size of uint8_t.
RDMA_OPTION_ID_REUSEADDR: Bound the rdma_cm_id to a reuseable address. This will allow other users to bind to that same address. The expected optlen is size of int.
RDMA_OPTION_ID_AFONLY: Set IPV6_V6ONLY socket. The expected optlen is size of int.
RDMA_OPTION_IB_PATH: Set IB path record data. The expected optlen is size of struct ibv_path_data[].
RDMA_OPTION_ID_ACK_TIMEOUT: Set QP ACK timeout. The value calculated according to the formula 4.096 * 2^(ack_timeout) usec.

Returns 0 on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason.

Option details may be found in the relevant header files.