From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: passt.top; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: passt.top; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=NpDq5RJo; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by passt.top (Postfix) with ESMTPS id 858B95A0619 for ; Fri, 10 Oct 2025 09:47:16 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1760082435; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=EM4OZo5uuHU6SLXDefsX+koOOgiqB/uQQ0BkP2+qjM0=; b=NpDq5RJosj+1fTYMHkIAYPPCb7moUZlV0lhq1MOTJUPuz3OYs76XRFaRy+PKHnyJt1ZA6N rqXxIEyKEHazmdaTEy2zNiUsKSnjxukbV5Beuiiz+5kS5sU7/LiMHLQOMy65nZ4sVoJb07 7dREtRjgMS6MabIG6znKUpesJq5zB7g= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-360-W3vDP7nAPT6kRYGLaU1ayg-1; Fri, 10 Oct 2025 03:47:12 -0400 X-MC-Unique: W3vDP7nAPT6kRYGLaU1ayg-1 X-Mimecast-MFC-AGG-ID: W3vDP7nAPT6kRYGLaU1ayg_1760082431 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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 mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 5BC11180057A; Fri, 10 Oct 2025 07:47:10 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.72.112.91]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id D031F30001B7; Fri, 10 Oct 2025 07:47:06 +0000 (UTC) From: Yumei Huang To: passt-dev@passt.top, sbrivio@redhat.com Subject: [PATCH v2 0/3] Retry SYNs for inbound connections Date: Fri, 10 Oct 2025 15:46:57 +0800 Message-ID: <20251010074700.22177-1-yuhuang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: YcYJjss1xvHxGNXMR9GBQr_GoVavbQ0D3Igvzng-9JI_1760082431 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true Message-ID-Hash: KMCLZEZM6O7ADYM7KEUYMW56Z23FUVPF X-Message-ID-Hash: KMCLZEZM6O7ADYM7KEUYMW56Z23FUVPF X-MailFrom: yuhuang@redhat.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: david@gibson.dropbear.id.au, yuhuang@redhat.com X-Mailman-Version: 3.3.8 Precedence: list List-Id: Development discussion and patches for passt Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: When a client connects, SYN would be sent to guest only once. If the guest is not connected or ready at that time, the connection will be reset in 10s. These patches introduce the SYN retry mechanism using the similar backoff timeout as linux kernel. Also update the data retransmission timeout. Yumei Huang (3): tcp: Rename "retrans" to "retries" tcp: Resend SYN for inbound connections tcp: Update data retransmission timeout tcp.c | 132 +++++++++++++++++++++++++++++++++++++++++++++-------- tcp.h | 2 + tcp_conn.h | 12 ++--- 3 files changed, 120 insertions(+), 26 deletions(-) -- 2.47.0