From patchwork Mon Jun 28 10:04:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arseny Krasnov X-Patchwork-Id: 12347629 X-Patchwork-Delegate: kuba@kernel.org 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=unavailable 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 D9A38C49EA3 for ; Mon, 28 Jun 2021 10:04:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C26F4613DF for ; Mon, 28 Jun 2021 10:04:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232806AbhF1KHM (ORCPT ); Mon, 28 Jun 2021 06:07:12 -0400 Received: from mx12.kaspersky-labs.com ([91.103.66.155]:21653 "EHLO mx12.kaspersky-labs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232804AbhF1KHF (ORCPT ); Mon, 28 Jun 2021 06:07:05 -0400 Received: from relay12.kaspersky-labs.com (unknown [127.0.0.10]) by relay12.kaspersky-labs.com (Postfix) with ESMTP id 6773175B6D; Mon, 28 Jun 2021 13:04:37 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kaspersky.com; s=mail202102; t=1624874677; bh=BZ3jvjqP0xCXEbI7iayhyYQw7MsrUL69d6g1M8V5buA=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=yTxDsPYXj6w27A4gagCsZb80X5LF8N3MsjYL/dGVCCMcQmE69C0//inbM/2DtwK3s R1zN/4OomSdIrUIS796TfbjNp8diTOMActuVcn3N3BgVhoE6G5NDXmc/3D8DVz9nvf 6RDZbE4T/+te/ynJLP44was87X1eI/Ejv4u3SPSyUGCzuXQRu0fIT+ITKscuZNHXh5 uqRVvGO9Ms6qSf3z8GY1qzBSkDIZSEuYBotKNy60khs97Txg41+ftDW4YQCwYmuJCD uVqUvFe26XLymV9P6qJGJXIwWb1/DkKaiihea2AtoYeFKiTqe7qHrkRltj+diMVxy4 OhyvsE00VdT+A== Received: from mail-hq2.kaspersky.com (unknown [91.103.66.206]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (Client CN "mail-hq2.kaspersky.com", Issuer "Kaspersky MailRelays CA G3" (verified OK)) by mailhub12.kaspersky-labs.com (Postfix) with ESMTPS id 24E3B75B2F; Mon, 28 Jun 2021 13:04:37 +0300 (MSK) Received: from arseniy-pc.avp.ru (10.64.64.121) 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 15.1.2176.14; Mon, 28 Jun 2021 13:04:36 +0300 From: Arseny Krasnov To: Stefan Hajnoczi , Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Arseny Krasnov , Andra Paraschiv , Norbert Slusarek , Colin Ian King CC: , , , , Subject: [RFC PATCH v1 12/16] virtio/vsock: add 'drop until EOR' logic Date: Mon, 28 Jun 2021 13:04:29 +0300 Message-ID: <20210628100432.571516-1-arseny.krasnov@kaspersky.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210628095959.569772-1-arseny.krasnov@kaspersky.com> References: <20210628095959.569772-1-arseny.krasnov@kaspersky.com> MIME-Version: 1.0 X-Originating-IP: [10.64.64.121] X-ClientProxiedBy: hqmailmbx2.avp.ru (10.64.67.242) 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: 06/28/2021 09:47:58 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 0 X-KSE-AntiSpam-Info: Lua profiles 164664 [Jun 28 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: 448 448 71fb1b37213ce9a885768d4012c46ac449c77b17 X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: 127.0.0.199:7.1.2;kaspersky.com:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;arseniy-pc.avp.ru: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: 06/28/2021 09:51:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 28.06.2021 5:59:00 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: 2021/06/28 08:23:00 X-KLMS-AntiVirus: Kaspersky Security for Linux Mail Server, version 8.0.3.30, bases: 2021/06/28 05:40:00 #16806866 X-KLMS-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Data will copied only if 'drop until EOR' mode is disabled, also if EOR found, 'msg_ready' is set only if we don't have current message to drop. Signed-off-by: Arseny Krasnov --- include/linux/virtio_vsock.h | 2 ++ net/vmw_vsock/virtio_transport_common.c | 23 +++++++++++++++++++---- 2 files changed, 21 insertions(+), 4 deletions(-) diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h index 7360ab7ea0af..18a50f64bf54 100644 --- a/include/linux/virtio_vsock.h +++ b/include/linux/virtio_vsock.h @@ -36,6 +36,7 @@ struct virtio_vsock_sock { u32 rx_bytes; u32 buf_alloc; struct list_head rx_queue; + bool drop_until_eor; }; struct virtio_vsock_pkt { @@ -89,6 +90,7 @@ virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk, struct msghdr *msg, int flags, bool *msg_ready); +void virtio_transport_seqpacket_drop(struct vsock_sock *vsk); s64 virtio_transport_stream_has_data(struct vsock_sock *vsk); s64 virtio_transport_stream_has_space(struct vsock_sock *vsk); diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c index 5a46c3f94e83..a8f74cc343e4 100644 --- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -425,7 +425,7 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, pkt = list_first_entry(&vvs->rx_queue, struct virtio_vsock_pkt, list); pkt_len = (size_t)le32_to_cpu(pkt->hdr.len); - bytes_to_copy = min(user_buf_len, pkt_len); + bytes_to_copy = vvs->drop_until_eor ? 0 : min(user_buf_len, pkt_len); if (bytes_to_copy) { int err; @@ -438,17 +438,22 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, spin_lock_bh(&vvs->rx_lock); - if (err) + if (err) { dequeued_len = err; - else + vvs->drop_until_eor = true; + } else { user_buf_len -= bytes_to_copy; + } } if (dequeued_len >= 0) dequeued_len += pkt_len; if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR) { - *msg_ready = true; + if (vvs->drop_until_eor) + vvs->drop_until_eor = false; + else + *msg_ready = true; } virtio_transport_dec_rx_pkt(vvs, pkt); @@ -487,6 +492,16 @@ virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk, } EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_dequeue); +void virtio_transport_seqpacket_drop(struct vsock_sock *vsk) +{ + struct virtio_vsock_sock *vvs = vsk->trans; + + spin_lock_bh(&vvs->rx_lock); + vvs->drop_until_eor = true; + spin_unlock_bh(&vvs->rx_lock); +} +EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_drop); + int virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk, struct msghdr *msg,