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| author | David Howells <dhowells@redhat.com> | 2020-04-28 22:06:54 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2020-05-20 15:33:41 +0100 |
| commit | d1f129470e6cb79b8b97fecd12689f6eb49e27fe (patch) | |
| tree | 99ec5401d87696e41505fc1e0fdf9d6e010d5d9e /net/rxrpc | |
| parent | c410bf01933e5e09d142c66c3df9ad470a7eec13 (diff) | |
| download | linux-d1f129470e6cb79b8b97fecd12689f6eb49e27fe.tar.gz linux-d1f129470e6cb79b8b97fecd12689f6eb49e27fe.tar.bz2 linux-d1f129470e6cb79b8b97fecd12689f6eb49e27fe.zip | |
rxrpc: Trace discarded ACKs
Add a tracepoint to track received ACKs that are discarded due to being
outside of the Tx window.
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc')
| -rw-r--r-- | net/rxrpc/input.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index e438bfd3fdf5..2f22f082a66c 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -866,8 +866,12 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb) /* Discard any out-of-order or duplicate ACKs (outside lock). */ if (before(first_soft_ack, call->ackr_first_seq) || - before(prev_pkt, call->ackr_prev_seq)) + before(prev_pkt, call->ackr_prev_seq)) { + trace_rxrpc_rx_discard_ack(call->debug_id, sp->hdr.serial, + first_soft_ack, call->ackr_first_seq, + prev_pkt, call->ackr_prev_seq); return; + } buf.info.rxMTU = 0; ioffset = offset + nr_acks + 3; @@ -879,8 +883,12 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb) /* Discard any out-of-order or duplicate ACKs (inside lock). */ if (before(first_soft_ack, call->ackr_first_seq) || - before(prev_pkt, call->ackr_prev_seq)) + before(prev_pkt, call->ackr_prev_seq)) { + trace_rxrpc_rx_discard_ack(call->debug_id, sp->hdr.serial, + first_soft_ack, call->ackr_first_seq, + prev_pkt, call->ackr_prev_seq); goto out; + } call->acks_latest_ts = skb->tstamp; call->ackr_first_seq = first_soft_ack; |