Commit 740586d2 authored by David Howells's avatar David Howells
Browse files

rxrpc: Trace changes in a call's receive window size 



Add a tracepoint (rxrpc_rx_rwind_change) to log changes in a call's receive
window size as imposed by the peer through an ACK packet.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent 005ede28

include/trace/events/rxrpc.h

+27 −0
Original line number Diff line number Diff line
@@ -707,6 +707,33 @@ TRACE_EVENT(rxrpc_rx_abort, 
		      __entry->abort_code)

	    );



TRACE_EVENT(rxrpc_rx_rwind_change,

	    TP_PROTO(struct rxrpc_call *call, rxrpc_serial_t serial,

		     u32 rwind, bool wake),



	    TP_ARGS(call, serial, rwind, wake),



	    TP_STRUCT__entry(

		    __field(struct rxrpc_call *,	call		)

		    __field(rxrpc_serial_t,		serial		)

		    __field(u32,			rwind		)

		    __field(bool,			wake		)

			     ),



	    TP_fast_assign(

		    __entry->call = call;

		    __entry->serial = serial;

		    __entry->rwind = rwind;

		    __entry->wake = wake;

			   ),



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

		      __entry->call,

		      __entry->serial,

		      __entry->rwind,

		      __entry->wake ? " wake" : "")

	    );



TRACE_EVENT(rxrpc_tx_data,

	    TP_PROTO(struct rxrpc_call *call, rxrpc_seq_t seq,

		     rxrpc_serial_t serial, u8 flags, bool retrans, bool lose),

net/rxrpc/input.c

+2 −0
Original line number Diff line number Diff line
@@ -665,6 +665,8 @@ static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb, 
			rwind = RXRPC_RXTX_BUFF_SIZE - 1;

		if (rwind > call->tx_winsize)

			wake = true;

		trace_rxrpc_rx_rwind_change(call, sp->hdr.serial,

					    ntohl(ackinfo->rwind), wake);

		call->tx_winsize = rwind;

	}