Libibverbs library
The Libibverbs library enables user-space processes to use Remote Direct Memory Access (RDMA) verbs.
The Libibverbs library is described in the InfiniBand architecture specification and the RDMA protocol verbs specification.
Several /dev/rdma/uverbsN character device nodes
are used to handle communication between the Libibverbs library
and the ib_uverbs kernel layer. Every RDMA network
interface controller (RNIC) adapter has one device that is registered
with the Open Fabrics Enterprise Distribution (OFED) core such as
the uverbs1 and uverbs2 devices.
To run on the appropriate device, the library writes commands corresponding
to the verb.