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rxrpc: Fix loss of PING RESPONSE ACK production due to PING ACKs

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Separate the output of PING ACKs from the output of other sorts of ACK so
that if we receive a PING ACK and schedule transmission of a PING RESPONSE
ACK, the response doesn't get cancelled by a PING ACK we happen to be
scheduling transmission of at the same time.

If a PING RESPONSE gets lost, the other side might just sit there waiting
for it and refuse to proceed otherwise.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2016-10-06 08:11:49 +01:00
parent 26cb02aa6d
commit a5af7e1fc6
8 changed files with 82 additions and 29 deletions
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1
net/rxrpc/call_object.c
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@@ -205,6 +205,7 @@ static void rxrpc_start_call_timer(struct rxrpc_call *call)
expire_at = ktime_add_ms(now, rxrpc_max_call_lifetime);
call->expire_at = expire_at;
call->ack_at = expire_at;
call->ping_at = expire_at;
call->resend_at = expire_at;
call->timer.expires = jiffies + LONG_MAX / 2;
rxrpc_set_timer(call, rxrpc_timer_begin, now);