From patchwork Mon Mar 4 08:43:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13580185 X-Patchwork-Delegate: kuba@kernel.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 66FBD24A00 for ; Mon, 4 Mar 2024 08:43:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709541825; cv=none; b=ENg2GjoKQ0KvxHtbiPeg2g73/e/vWymONcelNdh/FnSkazH9pffxDWoxjW4DMGkZu2ORfZba2hu31XIdAACt8VGm7Vg3rzFQ+SZSKkWp1S2ho0Qy0XAJd/qTSFHGfy62WMzYq18GghsEXQ5ILmGKx39gRzu/aF4Qse9731oWmaQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709541825; c=relaxed/simple; bh=M4d/FB7CR6JSc+NPeVGOFj1bwk3Vsnoq4ewViEAq+Rs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KnpbqBmDXA03zSEyVyptOjAfhGP5IeYFwnQsZcYLnMixV+SSlfRWR0qqQV6c5fNg4wDLTkqy8oDHZqhq1LpCzk8efYZ9NDUG+bkBZmUjgBXMTTUFybdFRjDrOF6SQU9HcEnVbU6ne0hoJf7ELn79ctrM9Qo9D/4SC4gZx71Y7IA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=ZzYW9sCK; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZzYW9sCK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1709541822; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5EZMFPUNWrXNVbCFwmPu2Cto1pVZS1f1ESdtHsSsnJ4=; b=ZzYW9sCKWkq8sSdtl6IXsD2jXESJ3cxhoSdRT5UYsQzuFoI2rX3+7vgZ3pvXtB2YJ7Qtvo xG+KmvZF0daY/69qRrbdBnNFmsXfYWMtv79B0HHnBSb80Q/T7DCdnLemKkzn6sMhOVz3eD gywicsspoKswomdL/+2H+dbjS3AczuQ= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-451-yWT9csKpOmmZF7f8PB4x5w-1; Mon, 04 Mar 2024 03:43:39 -0500 X-MC-Unique: yWT9csKpOmmZF7f8PB4x5w-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A23C028EA6E4; Mon, 4 Mar 2024 08:43:38 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.114]) by smtp.corp.redhat.com (Postfix) with ESMTP id 82129492BE2; Mon, 4 Mar 2024 08:43:37 +0000 (UTC) From: David Howells To: netdev@vger.kernel.org Cc: David Howells , Marc Dionne , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v2 07/21] rxrpc: Do lazy DF flag resetting Date: Mon, 4 Mar 2024 08:43:04 +0000 Message-ID: <20240304084322.705539-8-dhowells@redhat.com> In-Reply-To: <20240304084322.705539-1-dhowells@redhat.com> References: <20240304084322.705539-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 X-Patchwork-Delegate: kuba@kernel.org 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 cc: Marc Dionne cc: "David S. Miller" cc: Eric Dumazet cc: Jakub Kicinski cc: Paolo Abeni cc: linux-afs@lists.infradead.org cc: netdev@vger.kernel.org --- net/rxrpc/output.c | 4 ++-- net/rxrpc/rxkad.c | 1 - 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c index 1e039b6f4494..8aa8ba32eacc 100644 --- a/net/rxrpc/output.c +++ b/net/rxrpc/output.c @@ -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 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) * 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 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) 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: diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c index 28c9ce763be4..e451ac90bfee 100644 --- a/net/rxrpc/rxkad.c +++ b/net/rxrpc/rxkad.c @@ -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);