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

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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: David Howells <[email protected]>
This commit is contained in:
David Howells 2017-04-06 10:12:00 +01:00
commit 740586d290
2 changed files with 29 additions and 0 deletions
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2
net/rxrpc/input.c
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@ -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;
}