• David Howells's avatar
    rxrpc: Allow failed client calls to be retried · c038a58c
    David Howells authored
    Allow a client call that failed on network error to be retried, provided
    that the Tx queue still holds DATA packet 1.  This allows an operation to
    be submitted to another server or another address for the same server
    without having to repackage and re-encrypt the data so far processed.
    
    Two new functions are provided:
    
     (1) rxrpc_kernel_check_call() - This is used to find out the completion
         state of a call to guess whether it can be retried and whether it
         should be retried.
    
     (2) rxrpc_kernel_retry_call() - Disconnect the call from its current
         connection, reset the state and submit it as a new client call to a
         new address.  The new address need not match the previous address.
    
    A call may be retried even if all the data hasn't been loaded into it yet;
    a partially constructed will be retained at the same point it was at when
    an error condition was detected.  msg_data_left() can be used to find out
    how much data was packaged before the error occurred.
    Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    c038a58c
ar-internal.h 38.2 KB