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rxrpc: Do lazy DF flag resetting 

Don't reset the DF flag after transmission, but rather set it when needed
since it should be a fast op now that we call IP directly.

This includes turning it off for RESPONSE packets and, for the moment, ACK
packets.  In future, we will need to turn it on for ACK packets used to do
path MTU discovery.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: "David S. Miller" <davem@davemloft.net>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: linux-afs@lists.infradead.org
cc: netdev@vger.kernel.org
This commit is contained in:
David Howells 2024-01-29 22:38:31 +00:00
parent 693f9c13ec
commit d32636982c
2 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
net/rxrpc/output.c
View File

@ -231,6 +231,7 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb)
txb->ack.previousPacket = htonl(call->rx_highest_seq);
iov_iter_kvec(&msg.msg_iter, WRITE, iov, 1, len);
rxrpc_local_dont_fragment(conn->local, false);
ret = do_udp_sendmsg(conn->local->socket, &msg, len);
call->peer->last_tx_at = ktime_get_seconds();
if (ret < 0) {
@ -406,6 +407,7 @@ dont_set_request_ack:
* think it's small enough */
if (txb->len >= call->peer->maxdata)
goto send_fragmentable;
rxrpc_local_dont_fragment(conn->local, true);
txb->wire.flags = txb->flags & RXRPC_TXBUF_WIRE_FLAGS;
txb->last_sent = ktime_get_real();
@ -492,8 +494,6 @@ send_fragmentable:
rxrpc_inc_stat(call->rxnet, stat_tx_data_send_frag);
ret = do_udp_sendmsg(conn->local->socket, &msg, len);
conn->peer->last_tx_at = ktime_get_seconds();
rxrpc_local_dont_fragment(conn->local, true);
break;
default:

1
net/rxrpc/rxkad.c
View File

@ -726,7 +726,6 @@ static int rxkad_send_response(struct rxrpc_connection *conn,
rxrpc_local_dont_fragment(conn->local, false);
ret = kernel_sendmsg(conn->local->socket, &msg, iov, 3, len);
rxrpc_local_dont_fragment(conn->local, true);
if (ret < 0) {
trace_rxrpc_tx_fail(conn->debug_id, serial, ret,
rxrpc_tx_point_rxkad_response);