rdma_set_option(3) — Linux manual page

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)

COLOPHON

       This page is part of the rdma-core (RDMA Core Userspace Libraries
       and Daemons) project.  Information about the project can be found
       at ⟨https://github.com/linux-rdma/rdma-core⟩.  If you have a bug
       report for this manual page, send it to
       linux-rdma@vger.kernel.org.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2024-06-14.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2024-06-10.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
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       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

librdmacm                      2007-08-06             RDMA_SET_OPTION(3)

Pages that refer to this page: rdma_create_id(3), rdma_cm(7)

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