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| author | David Howells <dhowells@redhat.com> | 2023-01-31 15:31:49 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2023-02-07 23:11:21 +0000 |
| commit | f789bff2deb3ddae08950f8e4a1e6f41b916c520 (patch) | |
| tree | 7c373d90ee85643547686db38f26c4957df74eff /net/rxrpc/output.c | |
| parent | a33395ab85b9b9cff83948a03a1d6d96347935d8 (diff) | |
| download | lwn-f789bff2deb3ddae08950f8e4a1e6f41b916c520.tar.gz lwn-f789bff2deb3ddae08950f8e4a1e6f41b916c520.zip | |
rxrpc: Trace ack.rwind
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 <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Diffstat (limited to 'net/rxrpc/output.c')
| -rw-r--r-- | net/rxrpc/output.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c index 6b2022240076..5e53429c6922 100644 --- a/net/rxrpc/output.c +++ b/net/rxrpc/output.c @@ -80,7 +80,8 @@ static void rxrpc_set_keepalive(struct rxrpc_call *call) */ static size_t rxrpc_fill_out_ack(struct rxrpc_connection *conn, struct rxrpc_call *call, - struct rxrpc_txbuf *txb) + struct rxrpc_txbuf *txb, + u16 *_rwind) { struct rxrpc_ackinfo ackinfo; unsigned int qsize, sack, wrap, to; @@ -124,6 +125,7 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_connection *conn, jmax = rxrpc_rx_jumbo_max; qsize = (window - 1) - call->rx_consumed; rsize = max_t(int, call->rx_winsize - qsize, 0); + *_rwind = rsize; ackinfo.rxMTU = htonl(rxrpc_rx_mtu); ackinfo.maxMTU = htonl(mtu); ackinfo.rwind = htonl(rsize); @@ -190,6 +192,7 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) rxrpc_serial_t serial; size_t len, n; int ret, rtt_slot = -1; + u16 rwind; if (test_bit(RXRPC_CALL_DISCONNECTED, &call->flags)) return -ECONNRESET; @@ -205,7 +208,7 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) if (txb->ack.reason == RXRPC_ACK_PING) txb->wire.flags |= RXRPC_REQUEST_ACK; - n = rxrpc_fill_out_ack(conn, call, txb); + n = rxrpc_fill_out_ack(conn, call, txb, &rwind); if (n == 0) return 0; @@ -217,7 +220,8 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) txb->wire.serial = htonl(serial); trace_rxrpc_tx_ack(call->debug_id, serial, ntohl(txb->ack.firstPacket), - ntohl(txb->ack.serial), txb->ack.reason, txb->ack.nAcks); + ntohl(txb->ack.serial), txb->ack.reason, txb->ack.nAcks, + rwind); if (txb->ack.reason == RXRPC_ACK_PING) rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_ping); |