Commit b1d9f7fd authored by David Howells's avatar David Howells
Browse files

rxrpc: Add some more tracing 



Add the following extra tracing information:

 (1) Modify the rxrpc_transmit tracepoint to record the Tx window size as
     this is varied by the slow-start algorithm.

 (2) Modify the rxrpc_rx_ack tracepoint to record more information from
     received ACK packets.

 (3) Add an rxrpc_rx_data tracepoint to record the information in DATA
     packets.

 (4) Add an rxrpc_disconnect_call tracepoint to record call disconnection,
     including the reason the call was disconnected.

 (5) Add an rxrpc_improper_term tracepoint to record implicit termination
     of a call by a client either by starting a new call on a particular
     connection channel without first transmitting the final ACK for the
     previous call.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent b54a134a

include/trace/events/rxrpc.h

+89 −5
Original line number Diff line number Diff line
@@ -595,6 +595,7 @@ TRACE_EVENT(rxrpc_transmit, 
		    __field(enum rxrpc_transmit_trace,	why		)

		    __field(rxrpc_seq_t,		tx_hard_ack	)

		    __field(rxrpc_seq_t,		tx_top		)

		    __field(int,			tx_winsize	)

			     ),



	    TP_fast_assign(
@@ -602,38 +603,81 @@ TRACE_EVENT(rxrpc_transmit, 
		    __entry->why = why;

		    __entry->tx_hard_ack = call->tx_hard_ack;

		    __entry->tx_top = call->tx_top;

		    __entry->tx_winsize = call->tx_winsize;

			   ),



	    TP_printk("c=%p %s f=%08x n=%u",

	    TP_printk("c=%p %s f=%08x n=%u/%u",

		      __entry->call,

		      __print_symbolic(__entry->why, rxrpc_transmit_traces),

		      __entry->tx_hard_ack + 1,

		      __entry->tx_top - __entry->tx_hard_ack)

		      __entry->tx_top - __entry->tx_hard_ack,

		      __entry->tx_winsize)

	    );



TRACE_EVENT(rxrpc_rx_data,

	    TP_PROTO(struct rxrpc_call *call, rxrpc_seq_t seq,

		     rxrpc_serial_t serial, u8 flags, u8 anno),



	    TP_ARGS(call, seq, serial, flags, anno),



	    TP_STRUCT__entry(

		    __field(struct rxrpc_call *,	call		)

		    __field(rxrpc_seq_t,		seq		)

		    __field(rxrpc_serial_t,		serial		)

		    __field(u8,				flags		)

		    __field(u8,				anno		)

			     ),



	    TP_fast_assign(

		    __entry->call = call;

		    __entry->seq = seq;

		    __entry->serial = serial;

		    __entry->flags = flags;

		    __entry->anno = anno;

			   ),



	    TP_printk("c=%p DATA %08x q=%08x fl=%02x a=%02x",

		      __entry->call,

		      __entry->serial,

		      __entry->seq,

		      __entry->flags,

		      __entry->anno)

	    );



TRACE_EVENT(rxrpc_rx_ack,

	    TP_PROTO(struct rxrpc_call *call, rxrpc_seq_t first, u8 reason, u8 n_acks),

	    TP_PROTO(struct rxrpc_call *call,

		     rxrpc_serial_t serial, rxrpc_serial_t ack_serial,

		     rxrpc_seq_t first, rxrpc_seq_t prev, u8 reason, u8 n_acks),



	    TP_ARGS(call, first, reason, n_acks),

	    TP_ARGS(call, serial, ack_serial, first, prev, reason, n_acks),



	    TP_STRUCT__entry(

		    __field(struct rxrpc_call *,	call		)

		    __field(rxrpc_serial_t,		serial		)

		    __field(rxrpc_serial_t,		ack_serial	)

		    __field(rxrpc_seq_t,		first		)

		    __field(rxrpc_seq_t,		prev		)

		    __field(u8,				reason		)

		    __field(u8,				n_acks		)

			     ),



	    TP_fast_assign(

		    __entry->call = call;

		    __entry->serial = serial;

		    __entry->ack_serial = ack_serial;

		    __entry->first = first;

		    __entry->prev = prev;

		    __entry->reason = reason;

		    __entry->n_acks = n_acks;

			   ),



	    TP_printk("c=%p %s f=%08x n=%u",

	    TP_printk("c=%p %08x %s r=%08x f=%08x p=%08x n=%u",

		      __entry->call,

		      __entry->serial,

		      __print_symbolic(__entry->reason, rxrpc_ack_names),

		      __entry->ack_serial,

		      __entry->first,

		      __entry->prev,

		      __entry->n_acks)

	    );
@@ -1001,6 +1045,46 @@ TRACE_EVENT(rxrpc_congest, 
		      __entry->sum.retrans_timeo ? " rTxTo" : "")

	    );



TRACE_EVENT(rxrpc_disconnect_call,

	    TP_PROTO(struct rxrpc_call *call),



	    TP_ARGS(call),



	    TP_STRUCT__entry(

		    __field(struct rxrpc_call *,	call		)

		    __field(u32,			abort_code	)

			     ),



	    TP_fast_assign(

		    __entry->call = call;

		    __entry->abort_code = call->abort_code;

			   ),



	    TP_printk("c=%p ab=%08x",

		      __entry->call,

		      __entry->abort_code)

	    );



TRACE_EVENT(rxrpc_improper_term,

	    TP_PROTO(struct rxrpc_call *call),



	    TP_ARGS(call),



	    TP_STRUCT__entry(

		    __field(struct rxrpc_call *,	call		)

		    __field(u32,			abort_code	)

			     ),



	    TP_fast_assign(

		    __entry->call = call;

		    __entry->abort_code = call->abort_code;

			   ),



	    TP_printk("c=%p ab=%08x",

		      __entry->call,

		      __entry->abort_code)

	    );



#endif /* _TRACE_RXRPC_H */



/* This part must be outside protection */

net/rxrpc/conn_object.c

+1 −0
Original line number Diff line number Diff line
@@ -173,6 +173,7 @@ void __rxrpc_disconnect_call(struct rxrpc_connection *conn, 
		/* Save the result of the call so that we can repeat it if necessary

		 * through the channel, whilst disposing of the actual call record.

		 */

		trace_rxrpc_disconnect_call(call);

		chan->last_service_id = call->service_id;

		if (call->abort_code) {

			chan->last_abort = call->abort_code;

net/rxrpc/input.c

+5 −1
Original line number Diff line number Diff line
@@ -481,6 +481,7 @@ next_subpacket: 
			return rxrpc_proto_abort("LSA", call, seq);

	}



	trace_rxrpc_rx_data(call, seq, serial, flags, annotation);

	if (before_eq(seq, hard_ack)) {

		ack = RXRPC_ACK_DUPLICATE;

		ack_serial = serial;
@@ -765,7 +766,9 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb, 
	summary.ack_reason = (buf.ack.reason < RXRPC_ACK__INVALID ?

			      buf.ack.reason : RXRPC_ACK__INVALID);



	trace_rxrpc_rx_ack(call, first_soft_ack, summary.ack_reason, nr_acks);

	trace_rxrpc_rx_ack(call, sp->hdr.serial, acked_serial,

			   first_soft_ack, ntohl(buf.ack.previousPacket),

			   summary.ack_reason, nr_acks);



	if (buf.ack.reason == RXRPC_ACK_PING_RESPONSE)

		rxrpc_input_ping_response(call, skb->tstamp, acked_serial,
@@ -951,6 +954,7 @@ static void rxrpc_input_implicit_end_call(struct rxrpc_connection *conn, 
		break;

	}



	trace_rxrpc_improper_term(call);

	__rxrpc_disconnect_call(conn, call);

	rxrpc_notify_socket(call);

}

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