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rxrpc: Add some more tracing

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Add the following extra tracing information:

 (1) Modify the rxrpc_transmit tracepoint to record the Tx window size as
     this is varied by the slow-start algorithm.

 (2) Modify the rxrpc_rx_ack tracepoint to record more information from
     received ACK packets.

 (3) Add an rxrpc_rx_data tracepoint to record the information in DATA
     packets.

 (4) Add an rxrpc_disconnect_call tracepoint to record call disconnection,
     including the reason the call was disconnected.

 (5) Add an rxrpc_improper_term tracepoint to record implicit termination
     of a call by a client either by starting a new call on a particular
     connection channel without first transmitting the final ACK for the
     previous call.

Signed-off-by: David Howells <[email protected]>
This commit is contained in:
David Howells 2017-01-05 10:38:34 +00:00
commit b1d9f7fde0
3 changed files with 95 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

1
net/rxrpc/conn_object.c
View file

@ -173,6 +173,7 @@ void __rxrpc_disconnect_call(struct rxrpc_connection *conn,
/* Save the result of the call so that we can repeat it if necessary
* through the channel, whilst disposing of the actual call record.
*/
trace_rxrpc_disconnect_call(call);
chan->last_service_id = call->service_id;
if (call->abort_code) {
chan->last_abort = call->abort_code;

6
net/rxrpc/input.c
View file

@ -481,6 +481,7 @@ next_subpacket:
return rxrpc_proto_abort("LSA", call, seq);
}
trace_rxrpc_rx_data(call, seq, serial, flags, annotation);
if (before_eq(seq, hard_ack)) {
ack = RXRPC_ACK_DUPLICATE;
ack_serial = serial;
@ -765,7 +766,9 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
summary.ack_reason = (buf.ack.reason < RXRPC_ACK__INVALID ?
buf.ack.reason : RXRPC_ACK__INVALID);
trace_rxrpc_rx_ack(call, first_soft_ack, summary.ack_reason, nr_acks);
trace_rxrpc_rx_ack(call, sp->hdr.serial, acked_serial,
first_soft_ack, ntohl(buf.ack.previousPacket),
summary.ack_reason, nr_acks);
if (buf.ack.reason == RXRPC_ACK_PING_RESPONSE)
rxrpc_input_ping_response(call, skb->tstamp, acked_serial,
@ -951,6 +954,7 @@ static void rxrpc_input_implicit_end_call(struct rxrpc_connection *conn,
break;
}
trace_rxrpc_improper_term(call);
__rxrpc_disconnect_call(conn, call);
rxrpc_notify_socket(call);
}