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Commit 49e19ec7 authored by David Howells's avatar David Howells
Browse files

rxrpc: Add tracepoints to record received packets and end of data_ready 



Add two tracepoints:

 (1) Record the RxRPC protocol header of packets retrieved from the UDP
     socket by the data_ready handler.

 (2) Record the outcome of the data_ready handler.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent 2ab27215

include/trace/events/rxrpc.h

+38 −0
Original line number Diff line number Diff line
@@ -80,6 +80,44 @@ TRACE_EVENT(rxrpc_skb, 
		      __entry->where)

	    );



TRACE_EVENT(rxrpc_rx_packet,

	    TP_PROTO(struct rxrpc_skb_priv *sp),



	    TP_ARGS(sp),



	    TP_STRUCT__entry(

		    __field_struct(struct rxrpc_host_header,	hdr		)

			     ),



	    TP_fast_assign(

		    memcpy(&__entry->hdr, &sp->hdr, sizeof(__entry->hdr));

			   ),



	    TP_printk("%08x:%08x:%08x:%04x %08x %08x %02x %02x",

		      __entry->hdr.epoch, __entry->hdr.cid,

		      __entry->hdr.callNumber, __entry->hdr.serviceId,

		      __entry->hdr.serial, __entry->hdr.seq,

		      __entry->hdr.type, __entry->hdr.flags)

	    );



TRACE_EVENT(rxrpc_rx_done,

	    TP_PROTO(int result, int abort_code),



	    TP_ARGS(result, abort_code),



	    TP_STRUCT__entry(

		    __field(int,			result		)

		    __field(int,			abort_code	)

			     ),



	    TP_fast_assign(

		    __entry->result = result;

		    __entry->abort_code = abort_code;

			   ),



	    TP_printk("r=%d a=%d", __entry->result, __entry->abort_code)

	    );



TRACE_EVENT(rxrpc_abort,

	    TP_PROTO(const char *why, u32 cid, u32 call_id, rxrpc_seq_t seq,

		     int abort_code, int error),

net/rxrpc/input.c

+6 −2
Original line number Diff line number Diff line
@@ -683,6 +683,7 @@ void rxrpc_data_ready(struct sock *sk) 
	/* dig out the RxRPC connection details */

	if (rxrpc_extract_header(sp, skb) < 0)

		goto bad_message;

	trace_rxrpc_rx_packet(sp);



	_net("Rx RxRPC %s ep=%x call=%x:%x",

	     sp->hdr.flags & RXRPC_CLIENT_INITIATED ? "ToServer" : "ToClient",
@@ -767,6 +768,7 @@ void rxrpc_data_ready(struct sock *sk) 
out_unlock:

	rcu_read_unlock();

out:

	trace_rxrpc_rx_done(0, 0);

	return;



cant_route_call:
@@ -780,7 +782,7 @@ void rxrpc_data_ready(struct sock *sk) 
			skb_queue_tail(&local->accept_queue, skb);

			rxrpc_queue_work(&local->processor);

			_leave(" [incoming]");

			return;

			goto out;

		}

		skb->priority = RX_INVALID_OPERATION;

	} else {
@@ -789,7 +791,7 @@ void rxrpc_data_ready(struct sock *sk) 


	if (sp->hdr.type != RXRPC_PACKET_TYPE_ABORT) {

		_debug("reject type %d",sp->hdr.type);

		rxrpc_reject_packet(local, skb);

		goto reject_packet;

	} else {

		rxrpc_free_skb(skb);

	}
@@ -798,6 +800,8 @@ void rxrpc_data_ready(struct sock *sk) 


bad_message:

	skb->priority = RX_PROTOCOL_ERROR;

reject_packet:

	trace_rxrpc_rx_done(skb->mark, skb->priority);

	rxrpc_reject_packet(local, skb);

	_leave(" [badmsg]");

}