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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: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2016-09-08 11:10:12 +01:00
parent 2ab27215ea
commit 49e19ec7d3
2 changed files with 44 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
include/trace/events/rxrpc.h
View File

@ -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),

8
net/rxrpc/input.c
View File

@ -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]");
}