kernel/linux.git/net/rxrpc/output.c, branch v6.4

rxrpc: Trace ack.rwind

2023-02-07T23:11:21+00:00

Log ack.rwind in the rxrpc_tx_ack tracepoint. This value is useful to see as it represents flow-control information to the peer. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org

rxrpc: Remove local->defrag_sem

2023-01-31T16:38:35+00:00

We no longer need local->defrag_sem as all DATA packet transmission is now done from one thread, so remove it. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org

rxrpc: Simplify ACK handling

2023-01-31T16:38:35+00:00

Now that general ACK transmission is done from the same thread as incoming DATA packet wrangling, there's no possibility that the SACK table will be being updated by the latter whilst the former is trying to copy it to an ACK. This means that we can safely rotate the SACK table whilst updating it without having to take a lock, rather than keeping all the bits inside it in fixed place and copying and then rotating it in the transmitter. Therefore, simplify SACK handing by keeping track of starting point in the ring and rotate slots down as we consume them. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org

rxrpc: De-atomic call->ackr_window and call->ackr_nr_unacked

2023-01-31T16:38:26+00:00

call->ackr_window doesn't need to be atomic as ACK generation and ACK transmission are now done in the same thread, so drop the atomic64 handling and split it into two separate members. Similarly, call->ackr_nr_unacked doesn't need to be atomic now either. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org

rxrpc: Generate extra pings for RTT during heavy-receive call

2023-01-31T16:38:10+00:00

When doing a call that has a single transmitted data packet and a massive amount of received data packets, we only ping for one RTT sample, which means we don't get a good reading on it. Fix this by converting occasional IDLE ACKs into PING ACKs to elicit a response. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org

rxrpc: Remove call->state_lock

2023-01-06T09:43:33+00:00

All the setters of call->state are now in the I/O thread and thus the state lock is now unnecessary. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org

rxrpc: Clean up connection abort

2023-01-06T09:43:32+00:00

Clean up connection abort, using the connection state_lock to gate access to change that state, and use an rxrpc_call_completion value to indicate the difference between local and remote aborts as these can be pasted directly into the call state. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org

rxrpc: Transmit ACKs at the point of generation

2022-12-01T13:36:43+00:00

For ACKs generated inside the I/O thread, transmit the ACK at the point of generation. Where the ACK is generated outside of the I/O thread, it's offloaded to the I/O thread to transmit it. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org

rxrpc: Trace/count transmission underflows and cwnd resets

2022-12-01T13:36:42+00:00

Add a tracepoint to log when a cwnd reset occurs due to lack of transmission on a call. Add stat counters to count transmission underflows (ie. when we have tx window space, but sendmsg doesn't manage to keep up), cwnd resets and transmission failures. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org

rxrpc: Remove the _bh annotation from all the spinlocks

2022-12-01T13:36:42+00:00

None of the spinlocks in rxrpc need a _bh annotation now as the RCU callback routines no longer take spinlocks and the bulk of the packet wrangling code is now run in the I/O thread, not softirq context. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org