From patchwork Sun Mar 7 18:02:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arseny Krasnov X-Patchwork-Id: 12120935 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=-19.0 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, 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 6CFE7C433E0 for ; Sun, 7 Mar 2021 18:03:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 461A165181 for ; Sun, 7 Mar 2021 18:03:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231996AbhCGSCw (ORCPT ); Sun, 7 Mar 2021 13:02:52 -0500 Received: from mx12.kaspersky-labs.com ([91.103.66.155]:57845 "EHLO mx12.kaspersky-labs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232158AbhCGSCn (ORCPT ); Sun, 7 Mar 2021 13:02:43 -0500 Received: from relay12.kaspersky-labs.com (unknown [127.0.0.10]) by relay12.kaspersky-labs.com (Postfix) with ESMTP id 8BA2077822; Sun, 7 Mar 2021 21:02:41 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kaspersky.com; s=mail202102; t=1615140161; bh=hBXyj1lKZmAOw6GVYbkNSCutI1Kppbm39znGxYY49CA=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=2dZNNdxe8ekqr9yOMvj+jNurjtsM6QPjmIg2l0zUBIGwSbCN6hf+10koYMxdkA5gg oYIvAWJ8TuXMdafulvk2jdDf2/eW9qt67jJSbJdVJWVHGqDaWhWM5Xf1VLv9tFT6e2 mNa2QojLouVkQY8UykhSt6SSAi8LxOQMBcCB4moJLhapFk3BbQLoFfbet7fWJjBlxa wpp++eJBMAAvj7BxYmV84OrDR3JxIwUXJnILTr4ZCIOOQeDnxvhwn44L0mY3k8qVCQ aRhwN6uuzdyrZ4TIhTuYZz+awl1k2uWWbNQlxeNSBgKDXTHDpJ4wB+Xms0m7vtaCBm U3rVfblUZqgXg== 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 48D51777F2; Sun, 7 Mar 2021 21:02:41 +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 15.1.2176.2; Sun, 7 Mar 2021 21:02:40 +0300 From: Arseny Krasnov To: Stefan Hajnoczi , Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Arseny Krasnov , Jorgen Hansen , Andra Paraschiv , Norbert Slusarek , Colin Ian King CC: , , , , , Subject: [RFC PATCH v6 12/22] virtio/vsock: fetch length for SEQPACKET record Date: Sun, 7 Mar 2021 21:02:31 +0300 Message-ID: <20210307180235.3465973-1-arseny.krasnov@kaspersky.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210307175722.3464068-1-arseny.krasnov@kaspersky.com> References: <20210307175722.3464068-1-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: 03/07/2021 17:49:03 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 10 X-KSE-AntiSpam-Info: Lua profiles 162254 [Mar 07 2021] X-KSE-AntiSpam-Info: LuaCore: 431 431 6af1f0c9661e70e28927a654c0fea10ff13ade05 X-KSE-AntiSpam-Info: Version: 5.9.20.0 X-KSE-AntiSpam-Info: Envelope from: arseny.krasnov@kaspersky.com X-KSE-AntiSpam-Info: {Prob_from_in_msgid} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: {Macro_CONTENT_TYPE_ENCODING_NOT_JAPANESE} X-KSE-AntiSpam-Info: {Macro_CONTENT_TYPE_ENCODING_NOT_RUS} X-KSE-AntiSpam-Info: {Macro_CONTENT_TYPE_MISSED} X-KSE-AntiSpam-Info: {Macro_DATE_DOUBLE_SPACE} X-KSE-AntiSpam-Info: {Macro_DATE_MOSCOW} X-KSE-AntiSpam-Info: {Macro_FROM_DOUBLE_ENG_NAME} X-KSE-AntiSpam-Info: {Macro_FROM_LOWCAPS_DOUBLE_ENG_NAME_IN_EMAIL} X-KSE-AntiSpam-Info: {Macro_FROM_NOT_RU} X-KSE-AntiSpam-Info: {Macro_FROM_NOT_RUS_CHARSET} X-KSE-AntiSpam-Info: {Macro_FROM_REAL_NAME_MATCHES_ALL_USERNAME_PROB} X-KSE-AntiSpam-Info: {Macro_HEADERS_NOT_LIST} X-KSE-AntiSpam-Info: {Macro_MAILER_OTHER} X-KSE-AntiSpam-Info: {Macro_MISC_X_PRIORITY_MISSED} X-KSE-AntiSpam-Info: {Macro_NO_DKIM} X-KSE-AntiSpam-Info: {Macro_REPLY_TO_MISSED} X-KSE-AntiSpam-Info: {Macro_SUBJECT_AT_LEAST_2_WORDS} X-KSE-AntiSpam-Info: {Macro_SUBJECT_LONG_TEXT} X-KSE-AntiSpam-Info: {Macro_TO_CONTAINS_5_EMAILS} X-KSE-AntiSpam-Info: {Macro_TO_CONTAINS_SEVERAL_EMAILS} X-KSE-AntiSpam-Info: arseniy-pc.avp.ru:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;kaspersky.com:7.1.1;127.0.0.199:7.1.2 X-KSE-AntiSpam-Info: Rate: 10 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: 03/07/2021 17:52:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 07.03.2021 15:50:00 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: 2021/03/07 17:11:00 X-KLMS-AntiVirus: Kaspersky Security for Linux Mail Server, version 8.0.3.30, bases: 2021/03/07 15:50:00 #16360637 X-KLMS-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This adds transport callback which tries to fetch record begin marker from socket's rx queue. It is called from af_vsock.c before reading data packets of record. Signed-off-by: Arseny Krasnov --- include/linux/virtio_vsock.h | 1 + net/vmw_vsock/virtio_transport_common.c | 53 +++++++++++++++++++++++++ 2 files changed, 54 insertions(+) diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h index 466a5832d2f5..d7edcfeb4cd2 100644 --- a/include/linux/virtio_vsock.h +++ b/include/linux/virtio_vsock.h @@ -88,6 +88,7 @@ virtio_transport_dgram_dequeue(struct vsock_sock *vsk, struct msghdr *msg, size_t len, int flags); +size_t virtio_transport_seqpacket_seq_get_len(struct vsock_sock *vsk); int virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk, struct msghdr *msg, diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c index 5f1e283e43f3..6fc78fec41c0 100644 --- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -399,6 +399,59 @@ static inline void virtio_transport_remove_pkt(struct virtio_vsock_pkt *pkt) virtio_transport_free_pkt(pkt); } +static size_t virtio_transport_drop_until_seq_begin(struct virtio_vsock_sock *vvs) +{ + struct virtio_vsock_pkt *pkt, *n; + size_t bytes_dropped = 0; + + list_for_each_entry_safe(pkt, n, &vvs->rx_queue, list) { + if (le16_to_cpu(pkt->hdr.op) == VIRTIO_VSOCK_OP_SEQ_BEGIN) + break; + + bytes_dropped += le32_to_cpu(pkt->hdr.len); + virtio_transport_dec_rx_pkt(vvs, pkt); + virtio_transport_remove_pkt(pkt); + } + + return bytes_dropped; +} + +size_t virtio_transport_seqpacket_seq_get_len(struct vsock_sock *vsk) +{ + struct virtio_vsock_seq_hdr *seq_hdr; + struct virtio_vsock_sock *vvs; + struct virtio_vsock_pkt *pkt; + size_t bytes_dropped; + + vvs = vsk->trans; + + spin_lock_bh(&vvs->rx_lock); + + /* Fetch all orphaned 'RW' packets and send credit update. */ + bytes_dropped = virtio_transport_drop_until_seq_begin(vvs); + + if (list_empty(&vvs->rx_queue)) + goto out; + + pkt = list_first_entry(&vvs->rx_queue, struct virtio_vsock_pkt, list); + + vvs->seqpacket_state.user_read_copied = 0; + + seq_hdr = (struct virtio_vsock_seq_hdr *)pkt->buf; + vvs->seqpacket_state.user_read_seq_len = le32_to_cpu(seq_hdr->msg_len); + vvs->seqpacket_state.curr_rx_msg_id = le32_to_cpu(seq_hdr->msg_id); + virtio_transport_dec_rx_pkt(vvs, pkt); + virtio_transport_remove_pkt(pkt); +out: + spin_unlock_bh(&vvs->rx_lock); + + if (bytes_dropped) + virtio_transport_send_credit_update(vsk); + + return vvs->seqpacket_state.user_read_seq_len; +} +EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_seq_get_len); + static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, struct msghdr *msg, bool *msg_ready)