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/misc.c b/net/rxrpc/misc.c
index c7065d8..026e1f2 100644
--- a/net/rxrpc/misc.c
+++ b/net/rxrpc/misc.c
@@ -102,6 +102,24 @@
return str[reason];
}
+const char rxrpc_skb_traces[rxrpc_skb__nr_trace][7] = {
+ [rxrpc_skb_rx_cleaned] = "Rx CLN",
+ [rxrpc_skb_rx_freed] = "Rx FRE",
+ [rxrpc_skb_rx_got] = "Rx GOT",
+ [rxrpc_skb_rx_lost] = "Rx *L*",
+ [rxrpc_skb_rx_received] = "Rx RCV",
+ [rxrpc_skb_rx_purged] = "Rx PUR",
+ [rxrpc_skb_rx_rotated] = "Rx ROT",
+ [rxrpc_skb_rx_seen] = "Rx SEE",
+ [rxrpc_skb_tx_cleaned] = "Tx CLN",
+ [rxrpc_skb_tx_freed] = "Tx FRE",
+ [rxrpc_skb_tx_got] = "Tx GOT",
+ [rxrpc_skb_tx_lost] = "Tx *L*",
+ [rxrpc_skb_tx_new] = "Tx NEW",
+ [rxrpc_skb_tx_rotated] = "Tx ROT",
+ [rxrpc_skb_tx_seen] = "Tx SEE",
+};
+
const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4] = {
[rxrpc_conn_new_client] = "NWc",
[rxrpc_conn_new_service] = "NWs",