rxrpc: Improve skb tracing
Improve sk_buff tracing within AF_RXRPC by the following means:
(1) Use an enum to note the event type rather than plain integers and use
an array of event names rather than a big multi ?: list.
(2) Distinguish Rx from Tx packets and account them separately. This
requires the call phase to be tracked so that we know what we might
find in rxtx_buffer[].
(3) Add a parameter to rxrpc_{new,see,get,free}_skb() to indicate the
event type.
(4) A pair of 'rotate' events are added to indicate packets that are about
to be rotated out of the Rx and Tx windows.
(5) A pair of 'lost' events are added, along with rxrpc_lose_skb() for
packet loss injection recording.
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/net/rxrpc/conn_event.c b/net/rxrpc/conn_event.c
index 9b19c51..75a15a4 100644
--- a/net/rxrpc/conn_event.c
+++ b/net/rxrpc/conn_event.c
@@ -388,7 +388,7 @@
/* go through the conn-level event packets, releasing the ref on this
* connection that each one has when we've finished with it */
while ((skb = skb_dequeue(&conn->rx_queue))) {
- rxrpc_see_skb(skb);
+ rxrpc_see_skb(skb, rxrpc_skb_rx_seen);
ret = rxrpc_process_event(conn, skb, &abort_code);
switch (ret) {
case -EPROTO:
@@ -399,7 +399,7 @@
goto requeue_and_leave;
case -ECONNABORTED:
default:
- rxrpc_free_skb(skb);
+ rxrpc_free_skb(skb, rxrpc_skb_rx_freed);
break;
}
}
@@ -416,7 +416,7 @@
protocol_error:
if (rxrpc_abort_connection(conn, -ret, abort_code) < 0)
goto requeue_and_leave;
- rxrpc_free_skb(skb);
+ rxrpc_free_skb(skb, rxrpc_skb_rx_freed);
_leave(" [EPROTO]");
goto out;
}