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/call_event.c b/net/rxrpc/call_event.c
index f0cabc4..7d1b998 100644
--- a/net/rxrpc/call_event.c
+++ b/net/rxrpc/call_event.c
@@ -170,7 +170,7 @@
continue;
skb = call->rxtx_buffer[ix];
- rxrpc_see_skb(skb);
+ rxrpc_see_skb(skb, rxrpc_skb_tx_seen);
sp = rxrpc_skb(skb);
if (annotation == RXRPC_TX_ANNO_UNACK) {
@@ -199,7 +199,7 @@
continue;
skb = call->rxtx_buffer[ix];
- rxrpc_get_skb(skb);
+ rxrpc_get_skb(skb, rxrpc_skb_tx_got);
spin_unlock_bh(&call->lock);
sp = rxrpc_skb(skb);
@@ -211,7 +211,7 @@
if (rxrpc_send_data_packet(call->conn, skb) < 0) {
call->resend_at = now + 2;
- rxrpc_free_skb(skb);
+ rxrpc_free_skb(skb, rxrpc_skb_tx_freed);
return;
}
@@ -219,7 +219,7 @@
rxrpc_expose_client_call(call);
sp->resend_at = now + rxrpc_resend_timeout;
- rxrpc_free_skb(skb);
+ rxrpc_free_skb(skb, rxrpc_skb_tx_freed);
spin_lock_bh(&call->lock);
/* We need to clear the retransmit state, but there are two