RDMA_SET_OPTION

Section: Librdmacm Programmer's Manual (3)
Updated: 2007-08-06
Page Index
 

NAME

rdma_set_option - Set communication options for an rdma_cm_id.  

SYNOPSIS

#include <rdma/rdma_cma.h>

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

ARGUMENTS

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.
 

DESCRIPTION

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.
 

RETURN VALUE

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

NOTES

Option details may be found in the relevant header files.  

SEE ALSO

rdma_create_id(3)


 

Index

NAME
SYNOPSIS
ARGUMENTS
DESCRIPTION
RETURN VALUE
NOTES
SEE ALSO