From patchwork Fri Sep 3 06:15:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arseny Krasnov X-Patchwork-Id: 506958 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0B5FC433EF for ; Fri, 3 Sep 2021 06:15:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 85B5461057 for ; Fri, 3 Sep 2021 06:15:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345801AbhICGQu (ORCPT ); Fri, 3 Sep 2021 02:16:50 -0400 Received: from mx12.kaspersky-labs.com ([91.103.66.155]:42914 "EHLO mx12.kaspersky-labs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344995AbhICGQs (ORCPT ); Fri, 3 Sep 2021 02:16:48 -0400 Received: from relay12.kaspersky-labs.com (unknown [127.0.0.10]) by relay12.kaspersky-labs.com (Postfix) with ESMTP id 51834759BD; Fri, 3 Sep 2021 09:15:47 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kaspersky.com; s=mail202102; t=1630649747; bh=BqPoCBij9vew1YAREWzZw8o1lWcwQO0IauqQhBCy4lM=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=CUurtfQEksnzeycgwv9Kfcww+g5tJnzPevWvtIEUhRflfzCocj+4ehRNZdv0ctq04 wUADFKz73DWLaznqJ9LWUDS1Jpl5Bdi4Vxe5U7OX58Vu53ZTM1S2vTdylKipSrzmKR 2E6F5ileagM1AOjz84hXLb7OBEy52EuGORiIPlojszuRz16DJYSPLXTLAgyDwOnweW 8mLRLwl2rOEnpaRKxYFzZ4VD43YB+Sf3tC0+tqx8DS5JpGEvcfoeXFeWZeZXymgFUp nZPsWFATba+zrQxF85HRGArVVS9DadJZKNBdiw79taxnxWLppBjFCl7FY+DnNF6y5A SdlHrlNCd7i4Q== Received: from mail-hq2.kaspersky.com (unknown [91.103.66.206]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail-hq2.kaspersky.com", Issuer "Kaspersky MailRelays CA G3" (verified OK)) by mailhub12.kaspersky-labs.com (Postfix) with ESMTPS id 0D3B2759B7; Fri, 3 Sep 2021 09:15:47 +0300 (MSK) Received: from arseniy-pc.avp.ru (10.64.68.128) by hqmailmbx3.avp.ru (10.64.67.243) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Fri, 3 Sep 2021 09:15:46 +0300 From: Arseny Krasnov To: Stefan Hajnoczi , Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Arseny Krasnov , Norbert Slusarek , Colin Ian King , Andra Paraschiv CC: , , , , , Subject: [PATCH net-next v4 3/6] vhost/vsock: support MSG_EOR bit processing Date: Fri, 3 Sep 2021 09:15:38 +0300 Message-ID: <20210903061541.3187840-1-arseny.krasnov@kaspersky.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210903061353.3187150-1-arseny.krasnov@kaspersky.com> References: <20210903061353.3187150-1-arseny.krasnov@kaspersky.com> MIME-Version: 1.0 X-Originating-IP: [10.64.68.128] X-ClientProxiedBy: hqmailmbx3.avp.ru (10.64.67.243) To hqmailmbx3.avp.ru (10.64.67.243) X-KSE-ServerInfo: hqmailmbx3.avp.ru, 9 X-KSE-AntiSpam-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 5.9.20, Database issued on: 09/03/2021 05:49:39 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 0 X-KSE-AntiSpam-Info: Lua profiles 165946 [Sep 03 2021] X-KSE-AntiSpam-Info: Version: 5.9.20.0 X-KSE-AntiSpam-Info: Envelope from: arseny.krasnov@kaspersky.com X-KSE-AntiSpam-Info: LuaCore: 461 461 c95454ca24f64484bdf56c7842a96dd24416624e X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: arseniy-pc.avp.ru:7.1.1; 127.0.0.199:7.1.2; kaspersky.com:7.1.1; d41d8cd98f00b204e9800998ecf8427e.com:7.1.1 X-KSE-AntiSpam-Info: Rate: 0 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Deterministic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 09/03/2021 05:52:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 03.09.2021 4:06:00 X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit X-KLMS-Rule-ID: 52 X-KLMS-Message-Action: clean X-KLMS-AntiSpam-Status: not scanned, disabled by settings X-KLMS-AntiSpam-Interceptor-Info: not scanned X-KLMS-AntiPhishing: Clean, bases: 2021/09/03 04:45:00 X-KLMS-AntiVirus: Kaspersky Security for Linux Mail Server, version 8.0.3.30, bases: 2021/09/03 02:56:00 #17151492 X-KLMS-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org 'MSG_EOR' handling has similar logic as 'MSG_EOM' - if bit present in packet's header, reset it to 0. Then restore it back if packet processing wasn't completed. Instead of bool variable for each flag, bit mask variable was added: it has logical OR of 'MSG_EOR' and 'MSG_EOM' if needed, to restore flags, this variable is ORed with flags field of packet. Signed-off-by: Arseny Krasnov Reviewed-by: Stefano Garzarella --- drivers/vhost/vsock.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c index feaf650affbe..93e8d635e18f 100644 --- a/drivers/vhost/vsock.c +++ b/drivers/vhost/vsock.c @@ -114,7 +114,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock, size_t nbytes; size_t iov_len, payload_len; int head; - bool restore_flag = false; + u32 flags_to_restore = 0; spin_lock_bh(&vsock->send_pkt_list_lock); if (list_empty(&vsock->send_pkt_list)) { @@ -179,15 +179,20 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock, * created dynamically and are initialized with header * of current packet(except length). But in case of * SOCK_SEQPACKET, we also must clear message delimeter - * bit(VIRTIO_VSOCK_SEQ_EOM). Otherwise, instead of one - * packet with delimeter(which marks end of message), - * there will be sequence of packets with delimeter - * bit set. After initialized header will be copied to - * rx buffer, this bit will be restored. + * bit (VIRTIO_VSOCK_SEQ_EOM) and MSG_EOR bit + * (VIRTIO_VSOCK_SEQ_EOR) if set. Otherwise, + * there will be sequence of packets with these + * bits set. After initialized header will be copied to + * rx buffer, these required bits will be restored. */ if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOM) { pkt->hdr.flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOM); - restore_flag = true; + flags_to_restore |= VIRTIO_VSOCK_SEQ_EOM; + + if (le32_to_cpu(pkt->hdr.flags & VIRTIO_VSOCK_SEQ_EOR)) { + pkt->hdr.flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR); + flags_to_restore |= VIRTIO_VSOCK_SEQ_EOR; + } } } @@ -224,8 +229,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock, * to send it with the next available buffer. */ if (pkt->off < pkt->len) { - if (restore_flag) - pkt->hdr.flags |= cpu_to_le32(VIRTIO_VSOCK_SEQ_EOM); + pkt->hdr.flags |= cpu_to_le32(flags_to_restore); /* We are queueing the same virtio_vsock_pkt to handle * the remaining bytes, and we want to deliver it