ibnd_discover_fabric (3) Linux Manual Page

ibnd_discover_fabric, ibnd_destroy_fabric, ibnd_debug ibnd_show_progress – initialize ibnetdiscover library.

Synopsis

#include <infiniband/ibnetdisc.h>

void ibnd_destroy_fabric(ibnd_fabric_t *fabric)

void ibnd_debug(int i)

void ibnd_show_progress(int i)

int ibnd_set_max_smps_on_wire(int i)

Description

ibnd_discover_fabric() Discover the fabric connected to the port specified by ibmad_port, using a timeout specified. The "from" and "hops" parameters are optional and allow one to scan part of a fabric by specifying a node "from" and a number of hops away from that node to scan, "hops". This gives the user a "sub-fabric" which is "centered" anywhere they chose.

ibmad_port must be opened with at least IB_SMI_CLASS and IB_SMI_DIRECT_CLASS classes for ibnd_discover_fabric to work.

ibnd_destroy_fabric() free all memory and resources associated with the fabric.

ibnd_debug() Set the debug level to be printed as library operations take place.

ibnd_show_progress() Indicate that the library should print debug output which shows it’s progress through the fabric.

ibnd_set_max_smps_on_wire() Set the number of SMP’s which will be issued on the wire simultaneously.

Return Value

ibnd_discover_fabric() return NULL on failure, otherwise a valid ibnd_fabric_t object.

ibnd_destory_fabric(), ibnd_debug() NONE

ibnd_set_max_smps_on_wire() The previous value is returned

Examples

Discover the entire fabric connected to device mthca0, port 1.

        int mgmt_classes[2] = {IB_SMI_CLASS, IB_SMI_DIRECT_CLASS};
        struct ibmad_port *ibmad_port = mad_rpc_open_port(ca, ca_port, mgmt_classes, 2);
        ibnd_fabric_t *fabric = ibnd_discover_fabric(ibmad_port, 100, NULL, 0);
        …
        ibnd_destroy_fabric(fabric);
        mad_rpc_close_port(ibmad_port);

Discover only a single node and those nodes connected to it.

        …
        str2drpath(&(port_id.drpath), from, 0, 0);
        …
        ibnd_discover_fabric(ibmad_port, 100, &port_id, 1);
        …

See Also

       libibmad, mad_rpc_open_port

Authors

Ira Weiny <weiny2 [at] llnl.gov>