IBV_QUERY_GID_EX

Section: Libibverbs Programmer\[cq]s Manual (3)
Updated: 2020-04-24
Page Index

NAME

ibv_query_gid_ex - Query an InfiniBand port's GID table entry

SYNOPSIS


#include <infiniband/verbs.h>

int ibv_query_gid_ex(struct ibv_context *context,
                     uint32_t port_num,
                     uint32_t gid_index,
                     struct ibv_gid_entry *entry,
                     uint32_t flags);

DESCRIPTION

ibv_query_gid_ex() returns the GID entry at entry for gid_index of port port_num for device context context.

ARGUMENTS

context

The context of the device to query.

port_num

The number of port to query its GID table.

gid_index

The index of the GID table entry to query.

## entry Argument

An ibv_gid_entry struct, as defined in <infiniband/verbs.h>.


struct ibv_gid_entry {
    union ibv_gid gid;
    uint32_t gid_index;
    uint32_t port_num;
    uint32_t gid_type;
    uint32_t ndev_ifindex;
};

gid


    The GID entry.

: gid_index


    The GID table index of this entry.

: port_num


    The port number that this GID belongs to.

: gid_type


    enum ibv_gid_type, can be one of IBV_GID_TYPE_IB, IBV_GID_TYPE_ROCE_V1 or IBV_GID_TYPE_ROCE_V2.

: ndev_ifindex


    The interface index of the net device associated with this GID.
    It is 0 if there is no net device associated with it.

flags

Extra fields to query post ndev_ifindex, for now must be 0.

RETURN VALUE

ibv_query_gid_ex() returns 0 on success or errno value on error.

ERRORS

ENODATA: gid_index is within the GID table size of port port_num but there is no data in this index.

AUTHOR

Parav Pandit <parav@nvidia.com>