• David Howells's avatar
    rxrpc: Allow the kernel to mark a call as being non-interruptible · b960a34b
    David Howells authored
    Allow kernel services using AF_RXRPC to indicate that a call should be
    non-interruptible.  This allows kafs to make things like lock-extension and
    writeback data storage calls non-interruptible.
    
    If this is set, signals will be ignored for operations on that call where
    possible - such as waiting to get a call channel on an rxrpc connection.
    
    It doesn't prevent UDP sendmsg from being interrupted, but that will be
    handled by packet retransmission.
    
    rxrpc_kernel_recv_data() isn't affected by this since that never waits,
    preferring instead to return -EAGAIN and leave the waiting to the caller.
    
    Userspace initiated calls can't be set to be uninterruptible at this time.
    Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    b960a34b
sendmsg.c 21.6 KB