• Chuck Lever's avatar
    xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt · e28ce900
    Chuck Lever authored
    Change the rpcrdma_xprt_disconnect() function so that it no longer
    waits for the DISCONNECTED event.  This prevents blocking if the
    remote is unresponsive.
    
    In rpcrdma_xprt_disconnect(), the transport's rpcrdma_ep is
    detached. Upon return from rpcrdma_xprt_disconnect(), the transport
    (r_xprt) is ready immediately for a new connection.
    
    The RDMA_CM_DEVICE_REMOVAL and RDMA_CM_DISCONNECTED events are now
    handled almost identically.
    
    However, because the lifetimes of rpcrdma_xprt structures and
    rpcrdma_ep structures are now independent, creating an rpcrdma_ep
    needs to take a module ref count. The ep now owns most of the
    hardware resources for a transport.
    
    Also, a kref is needed to ensure that rpcrdma_ep sticks around
    long enough for the cm_event_handler to finish.
    Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
    Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
    e28ce900
backchannel.c 7.22 KB