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rxrpc: Perform terminal call ACK/ABORT retransmission from conn processor

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Perform terminal call ACK/ABORT retransmission in the connection processor
rather than in the call processor.  With this change, once last_call is
set, no more incoming packets will be routed to the corresponding call or
any earlier calls on that channel (call IDs must only increase on a channel
on a connection).

Further, if a packet's callNumber is before the last_call ID or a packet is
aimed at successfully completed service call then that packet is discarded
and ignored.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2016-08-23 15:27:25 +01:00
parent 563ea7d5d4
commit 18bfeba50d
4 changed files with 157 additions and 4 deletions
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10
net/rxrpc/conn_object.c
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@@ -166,7 +166,15 @@ void __rxrpc_disconnect_call(struct rxrpc_call *call)
/* Save the result of the call so that we can repeat it if necessary
* through the channel, whilst disposing of the actual call record.
*/
chan->last_result = call->local_abort;
chan->last_service_id = call->service_id;
if (call->local_abort) {
chan->last_abort = call->local_abort;
chan->last_type = RXRPC_PACKET_TYPE_ABORT;
} else {
chan->last_seq = call->rx_data_eaten;
chan->last_type = RXRPC_PACKET_TYPE_ACK;
}
/* Sync with rxrpc_conn_retransmit(). */
smp_wmb();
chan->last_call = chan->call_id;
chan->call_id = chan->call_counter;