From patchwork Sun Mar 7 18:02:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arseny Krasnov X-Patchwork-Id: 12120969 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=-19.0 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=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 6F260C4332B for ; Sun, 7 Mar 2021 18:03:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5015565194 for ; Sun, 7 Mar 2021 18:03:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232470AbhCGSDZ (ORCPT ); Sun, 7 Mar 2021 13:03:25 -0500 Received: from mx13.kaspersky-labs.com ([91.103.66.164]:51112 "EHLO mx13.kaspersky-labs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232731AbhCGSDB (ORCPT ); Sun, 7 Mar 2021 13:03:01 -0500 Received: from relay13.kaspersky-labs.com (unknown [127.0.0.10]) by relay13.kaspersky-labs.com (Postfix) with ESMTP id 5DC71521304; Sun, 7 Mar 2021 21:02:59 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kaspersky.com; s=mail202102; t=1615140179; bh=bigWKFEUM8n+Htp2u4DhxFAjxOCtGL9BQyyzGahsGWE=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=TcLY/9dFluGE9aGAmUGrAxFEkoVf/Q/zi1pVkzl3jd0JSEKzpmPVRb7fg92pJxZTk 4Wk73mVd8tuGX1R1gI+SCIet4QSa2Ls4ssYVybPVpZVnFIK6ayOmFAf8EwRz8o3e3U 6TN3Ytuoqn280YVqDAJG5GjjLn/EP11r0k0TmZB5UrlsZijHnqiZPAoVfwW7MRnDGT ijoqEB5C9J+VNtBOriukP7tJF0aqY46N0G80lkKtyrMLjf0v4t59b+NptyLaZ6y73Z vlCLWr299DJjn3LUCElc6CZNMZCQpAqpVOE60GplM6xlZ3MflzfyY6LZ5Y80GCszYn EWa/QY5upL9dQ== 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 mailhub13.kaspersky-labs.com (Postfix) with ESMTPS id E80865212ED; Sun, 7 Mar 2021 21:02:58 +0300 (MSK) Received: from arseniy-pc.avp.ru (10.64.68.129) 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 21:02:58 +0300 From: Arseny Krasnov To: Stefan Hajnoczi , Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Arseny Krasnov , Jorgen Hansen , Norbert Slusarek , Colin Ian King , Andra Paraschiv CC: , , , , , Subject: [RFC PATCH v6 13/22] virtio/vsock: add SEQPACKET receive logic Date: Sun, 7 Mar 2021 21:02:50 +0300 Message-ID: <20210307180253.3466110-1-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: [10.64.68.129] 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: 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: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC This modifies current receive logic for SEQPACKET support: 1) Inserts 'SEQ_BEGIN' packet to socket's rx queue. 2) Inserts 'RW' packet to socket's rx queue, but without merging with buffer of last packet in queue. 3) Performs check for packet and socket types on receive(if mismatch, then reset connection). Signed-off-by: Arseny Krasnov --- net/vmw_vsock/virtio_transport_common.c | 63 +++++++++++++++++-------- 1 file changed, 44 insertions(+), 19 deletions(-) diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c index 6fc78fec41c0..9d86375935ce 100644 --- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -165,6 +165,14 @@ void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt) } EXPORT_SYMBOL_GPL(virtio_transport_deliver_tap_pkt); +static u16 virtio_transport_get_type(struct sock *sk) +{ + if (sk->sk_type == SOCK_STREAM) + return VIRTIO_VSOCK_TYPE_STREAM; + else + return VIRTIO_VSOCK_TYPE_SEQPACKET; +} + /* This function can only be used on connecting/connected sockets, * since a socket assigned to a transport is required. * @@ -1062,25 +1070,27 @@ virtio_transport_recv_enqueue(struct vsock_sock *vsk, goto out; } - /* Try to copy small packets into the buffer of last packet queued, - * to avoid wasting memory queueing the entire buffer with a small - * payload. - */ - if (pkt->len <= GOOD_COPY_LEN && !list_empty(&vvs->rx_queue)) { - struct virtio_vsock_pkt *last_pkt; + if (le16_to_cpu(pkt->hdr.type) == VIRTIO_VSOCK_TYPE_STREAM) { + /* Try to copy small packets into the buffer of last packet queued, + * to avoid wasting memory queueing the entire buffer with a small + * payload. + */ + if (pkt->len <= GOOD_COPY_LEN && !list_empty(&vvs->rx_queue)) { + struct virtio_vsock_pkt *last_pkt; - last_pkt = list_last_entry(&vvs->rx_queue, - struct virtio_vsock_pkt, list); + last_pkt = list_last_entry(&vvs->rx_queue, + struct virtio_vsock_pkt, list); - /* If there is space in the last packet queued, we copy the - * new packet in its buffer. - */ - if (pkt->len <= last_pkt->buf_len - last_pkt->len) { - memcpy(last_pkt->buf + last_pkt->len, pkt->buf, - pkt->len); - last_pkt->len += pkt->len; - free_pkt = true; - goto out; + /* If there is space in the last packet queued, we copy the + * new packet in its buffer. + */ + if (pkt->len <= last_pkt->buf_len - last_pkt->len) { + memcpy(last_pkt->buf + last_pkt->len, pkt->buf, + pkt->len); + last_pkt->len += pkt->len; + free_pkt = true; + goto out; + } } } @@ -1100,9 +1110,13 @@ virtio_transport_recv_connected(struct sock *sk, int err = 0; switch (le16_to_cpu(pkt->hdr.op)) { + case VIRTIO_VSOCK_OP_SEQ_BEGIN: + case VIRTIO_VSOCK_OP_SEQ_END: case VIRTIO_VSOCK_OP_RW: virtio_transport_recv_enqueue(vsk, pkt); - sk->sk_data_ready(sk); + + if (le16_to_cpu(pkt->hdr.op) != VIRTIO_VSOCK_OP_SEQ_BEGIN) + sk->sk_data_ready(sk); return err; case VIRTIO_VSOCK_OP_CREDIT_UPDATE: sk->sk_write_space(sk); @@ -1245,6 +1259,12 @@ virtio_transport_recv_listen(struct sock *sk, struct virtio_vsock_pkt *pkt, return 0; } +static bool virtio_transport_valid_type(u16 type) +{ + return (type == VIRTIO_VSOCK_TYPE_STREAM) || + (type == VIRTIO_VSOCK_TYPE_SEQPACKET); +} + /* We are under the virtio-vsock's vsock->rx_lock or vhost-vsock's vq->mutex * lock. */ @@ -1270,7 +1290,7 @@ void virtio_transport_recv_pkt(struct virtio_transport *t, le32_to_cpu(pkt->hdr.buf_alloc), le32_to_cpu(pkt->hdr.fwd_cnt)); - if (le16_to_cpu(pkt->hdr.type) != VIRTIO_VSOCK_TYPE_STREAM) { + if (!virtio_transport_valid_type(le16_to_cpu(pkt->hdr.type))) { (void)virtio_transport_reset_no_sock(t, pkt); goto free_pkt; } @@ -1287,6 +1307,11 @@ void virtio_transport_recv_pkt(struct virtio_transport *t, } } + if (virtio_transport_get_type(sk) != le16_to_cpu(pkt->hdr.type)) { + (void)virtio_transport_reset_no_sock(t, pkt); + goto free_pkt; + } + vsk = vsock_sk(sk); lock_sock(sk);