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rxrpc: Add a tracepoint to log ACK transmission

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Add a tracepoint to log information about ACK transmission.

Signed-off-by: David Howels <dhowells@redhat.com>
This commit is contained in:
David Howells
2016-09-17 10:49:13 +01:00
parent ec71eb9ada
commit f3639df2d9
3 changed files with 39 additions and 1 deletions
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7
net/rxrpc/output.c
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@@ -38,12 +38,14 @@ struct rxrpc_pkt_buffer {
static size_t rxrpc_fill_out_ack(struct rxrpc_call *call,
struct rxrpc_pkt_buffer *pkt)
{
rxrpc_serial_t serial;
rxrpc_seq_t hard_ack, top, seq;
int ix;
u32 mtu, jmax;
u8 *ackp = pkt->acks;
/* Barrier against rxrpc_input_data(). */
serial = call->ackr_serial;
hard_ack = READ_ONCE(call->rx_hard_ack);
top = smp_load_acquire(&call->rx_top);
@@ -51,7 +53,7 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_call *call,
pkt->ack.maxSkew = htons(call->ackr_skew);
pkt->ack.firstPacket = htonl(hard_ack + 1);
pkt->ack.previousPacket = htonl(call->ackr_prev_seq);
pkt->ack.serial = htonl(call->ackr_serial);
pkt->ack.serial = htonl(serial);
pkt->ack.reason = call->ackr_reason;
pkt->ack.nAcks = top - hard_ack;
@@ -75,6 +77,9 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_call *call,
pkt->ackinfo.rwind = htonl(call->rx_winsize);
pkt->ackinfo.jumbo_max = htonl(jmax);
trace_rxrpc_tx_ack(call, hard_ack + 1, serial, call->ackr_reason,
top - hard_ack);
*ackp++ = 0;
*ackp++ = 0;
*ackp++ = 0;