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Merge tag 'rxrpc-rewrite-20160923' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
David Howells says:
====================
rxrpc: Bug fixes and tracepoints
Here are a bunch of bug fixes:
(1) Need to set the timestamp on a Tx packet before queueing it to avoid
trouble with the retransmission function.
(2) Don't send an ACK at the end of the service reply transmission; it's
the responsibility of the client to send an ACK to close the call.
The service can resend the last DATA packet or send a PING ACK.
(3) Wake sendmsg() on abnormal call termination.
(4) Use ktime_add_ms() not ktime_add_ns() to add millisecond offsets.
(5) Use before_eq() & co. to compare serial numbers (which may wrap).
(6) Start the resend timer on DATA packet transmission.
(7) Don't accidentally cancel a retransmission upon receiving a NACK.
(8) Fix the call timer setting function to deal with timeouts that are now
or past.
(9) Don't use a flag to communicate the presence of the last packet in the
Tx buffer from sendmsg to the input routines where ACK and DATA
reception is handled. The problem is that there's a window between
queueing the last packet for transmission and setting the flag in
which ACKs or reply DATA packets can arrive, causing apparent state
machine violation issues.
Instead use the annotation buffer to mark the last packet and pick up
and set the flag in the input routines.
(10) Don't call the tx_ack tracepoint and don't allocate a serial number if
someone else nicked the ACK we were about to transmit.
There are also new tracepoints and one altered tracepoint used to track
down the above bugs:
(11) Call timer tracepoint.
(12) Data Tx tracepoint (and adjustments to ACK tracepoint).
(13) Injected Rx packet loss tracepoint.
(14) Ack proposal tracepoint.
(15) Retransmission selection tracepoint.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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