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rxrpc: Trace packet transmission

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Trace successful packet transmission (kernel_sendmsg() succeeded, that is)
in AF_RXRPC.  We can share the enum that defines the transmission points
with the trace_rxrpc_tx_fail() tracepoint, so rename its constants to be
applicable to both.

Also, save the internal call->debug_id in the rxrpc_channel struct so that
it can be used in retransmission trace lines.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2018-07-23 17:18:37 +01:00
parent f3f8337c9e
commit 4764c0da69
8 changed files with 127 additions and 50 deletions
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11
net/rxrpc/input.c
View File

@@ -496,7 +496,7 @@ next_subpacket:
return rxrpc_proto_abort("LSA", call, seq);
}
trace_rxrpc_rx_data(call, seq, serial, flags, annotation);
trace_rxrpc_rx_data(call->debug_id, seq, serial, flags, annotation);
if (before_eq(seq, hard_ack)) {
ack = RXRPC_ACK_DUPLICATE;
ack_serial = serial;
@@ -592,6 +592,10 @@ ack:
rxrpc_propose_ACK(call, ack, skew, ack_serial,
immediate_ack, true,
rxrpc_propose_ack_input_data);
else
rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, skew, serial,
false, true,
rxrpc_propose_ack_input_data);
if (sp->hdr.seq == READ_ONCE(call->rx_hard_ack) + 1)
rxrpc_notify_socket(call);
@@ -1262,6 +1266,11 @@ void rxrpc_data_ready(struct sock *udp_sk)
/* But otherwise we need to retransmit the final packet
* from data cached in the connection record.
*/
if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA)
trace_rxrpc_rx_data(chan->call_debug_id,
sp->hdr.seq,
sp->hdr.serial,
sp->hdr.flags, 0);
rxrpc_post_packet_to_conn(conn, skb);
goto out_unlock;
}