RDMA_SET_OPTION(3)       Librdmacm Programmer's Manual      RDMA_SET_OPTION(3)

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)

librdmacm                         2007-08-06                RDMA_SET_OPTION(3)