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rxrpc: Add data Tx tracepoint and adjust Tx ACK tracepoint

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Add a tracepoint to log transmission of DATA packets (including loss
injection).

Adjust the ACK transmission tracepoint to include the packet serial number
and to line this up with the DATA transmission display.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2016-09-23 12:39:22 +01:00
parent fc7ab6d29a
commit be832aecc5
3 changed files with 49 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

52
include/trace/events/rxrpc.h
View file

@ -256,33 +256,67 @@ TRACE_EVENT(rxrpc_rx_ack,
__entry->n_acks)
);
TRACE_EVENT(rxrpc_tx_ack,
TP_PROTO(struct rxrpc_call *call, rxrpc_seq_t first,
rxrpc_serial_t serial, u8 reason, u8 n_acks),
TRACE_EVENT(rxrpc_tx_data,
TP_PROTO(struct rxrpc_call *call, rxrpc_seq_t seq,
rxrpc_serial_t serial, u8 flags, bool lose),
TP_ARGS(call, first, serial, reason, n_acks),
TP_ARGS(call, seq, serial, flags, lose),
TP_STRUCT__entry(
__field(struct rxrpc_call *, call )
__field(rxrpc_seq_t, first )
__field(rxrpc_seq_t, seq )
__field(rxrpc_serial_t, serial )
__field(u8, flags )
__field(bool, lose )
),
TP_fast_assign(
__entry->call = call;
__entry->seq = seq;
__entry->serial = serial;
__entry->flags = flags;
__entry->lose = lose;
),
TP_printk("c=%p DATA %08x q=%08x fl=%02x%s",
__entry->call,
__entry->serial,
__entry->seq,
__entry->flags,
__entry->lose ? " *LOSE*" : "")
);
TRACE_EVENT(rxrpc_tx_ack,
TP_PROTO(struct rxrpc_call *call, rxrpc_serial_t serial,
rxrpc_seq_t ack_first, rxrpc_serial_t ack_serial,
u8 reason, u8 n_acks),
TP_ARGS(call, serial, ack_first, ack_serial, reason, n_acks),
TP_STRUCT__entry(
__field(struct rxrpc_call *, call )
__field(rxrpc_serial_t, serial )
__field(rxrpc_seq_t, ack_first )
__field(rxrpc_serial_t, ack_serial )
__field(u8, reason )
__field(u8, n_acks )
),
TP_fast_assign(
__entry->call = call;
__entry->first = first;
__entry->serial = serial;
__entry->ack_first = ack_first;
__entry->ack_serial = ack_serial;
__entry->reason = reason;
__entry->n_acks = n_acks;
),
TP_printk("c=%p %s f=%08x r=%08x n=%u",
TP_printk(" c=%p ACK %08x %s f=%08x r=%08x n=%u",
__entry->call,
rxrpc_acks(__entry->reason),
__entry->first,
__entry->serial,
rxrpc_acks(__entry->reason),
__entry->ack_first,
__entry->ack_serial,
__entry->n_acks)
);

5
net/rxrpc/conn_event.c
View file

@ -98,9 +98,6 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
pkt.info.rwind = htonl(rxrpc_rx_window_size);
pkt.info.jumbo_max = htonl(rxrpc_rx_jumbo_max);
len += sizeof(pkt.ack) + sizeof(pkt.info);
trace_rxrpc_tx_ack(NULL, chan->last_seq, 0,
RXRPC_ACK_DUPLICATE, 0);
break;
}
@ -122,6 +119,8 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
_proto("Tx ABORT %%%u { %d } [re]", serial, conn->local_abort);
break;
case RXRPC_PACKET_TYPE_ACK:
trace_rxrpc_tx_ack(NULL, serial, chan->last_seq, 0,
RXRPC_ACK_DUPLICATE, 0);
_proto("Tx ACK %%%u [re]", serial);
break;
}

5
net/rxrpc/output.c
View file

@ -177,7 +177,7 @@ int rxrpc_send_call_packet(struct rxrpc_call *call, u8 type)
pkt->whdr.serial = htonl(serial);
switch (type) {
case RXRPC_PACKET_TYPE_ACK:
trace_rxrpc_tx_ack(call,
trace_rxrpc_tx_ack(call, serial,
ntohl(pkt->ack.firstPacket),
ntohl(pkt->ack.serial),
pkt->ack.reason, pkt->ack.nAcks);
@ -275,6 +275,8 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb)
if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) {
static int lose;
if ((lose++ & 7) == 7) {
trace_rxrpc_tx_data(call, sp->hdr.seq, serial,
whdr.flags, true);
rxrpc_lose_skb(skb, rxrpc_skb_tx_lost);
_leave(" = 0 [lose]");
return 0;
@ -302,6 +304,7 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb)
goto send_fragmentable;
done:
trace_rxrpc_tx_data(call, sp->hdr.seq, serial, whdr.flags, false);
if (ret >= 0) {
ktime_t now = ktime_get_real();
skb->tstamp = now;