From patchwork Fri Dec 11 10:32:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Paraschiv, Andra-Irina" X-Patchwork-Id: 11967863 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=-18.8 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 84105C2BB48 for ; Fri, 11 Dec 2020 10:34:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61D8A23EF1 for ; Fri, 11 Dec 2020 10:34:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387795AbgLKKea (ORCPT ); Fri, 11 Dec 2020 05:34:30 -0500 Received: from smtp-fw-9102.amazon.com ([207.171.184.29]:35271 "EHLO smtp-fw-9102.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730586AbgLKKdr (ORCPT ); Fri, 11 Dec 2020 05:33:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1607682827; x=1639218827; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=oMa58ipO9lk82GqsUITsDZKmPapfMMJiBG26d4CUhXw=; b=YXLnjiqPrSlCYQN83daa7vq/HrN6okOklrpDP3LARz2os2PDBjkNNRSq ZpeA9SRLpDXl9qRTktiuGF5ZqUPrHEHr76kZTvikYfH8VnSw5Fc7uQNVy qYPME+rNvuswVT/fo7fdiZFUzqqQk4y2OEXPB4ZZYCH3VRqGtZFMaiHt6 U=; X-IronPort-AV: E=Sophos;i="5.78,411,1599523200"; d="scan'208";a="103438578" Received: from sea32-co-svc-lb4-vlan3.sea.corp.amazon.com (HELO email-inbound-relay-2c-c6afef2e.us-west-2.amazon.com) ([10.47.23.38]) by smtp-border-fw-out-9102.sea19.amazon.com with ESMTP; 11 Dec 2020 10:33:00 +0000 Received: from EX13D16EUB003.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan2.pdx.amazon.com [10.236.137.194]) by email-inbound-relay-2c-c6afef2e.us-west-2.amazon.com (Postfix) with ESMTPS id EAE48A202D; Fri, 11 Dec 2020 10:32:58 +0000 (UTC) Received: from 38f9d34ed3b1.ant.amazon.com (10.43.162.252) by EX13D16EUB003.ant.amazon.com (10.43.166.99) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 11 Dec 2020 10:32:53 +0000 From: Andra Paraschiv To: netdev CC: linux-kernel , "David S . Miller" , David Duncan , Dexuan Cui , Alexander Graf , Jorgen Hansen , Jakub Kicinski , Stefano Garzarella , Stefan Hajnoczi , Vitaly Kuznetsov , Andra Paraschiv Subject: [PATCH net-next v3 1/4] vm_sockets: Add flags field in the vsock address data structure Date: Fri, 11 Dec 2020 12:32:38 +0200 Message-ID: <20201211103241.17751-2-andraprs@amazon.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20201211103241.17751-1-andraprs@amazon.com> References: <20201211103241.17751-1-andraprs@amazon.com> MIME-Version: 1.0 X-Originating-IP: [10.43.162.252] X-ClientProxiedBy: EX13D28UWB003.ant.amazon.com (10.43.161.60) To EX13D16EUB003.ant.amazon.com (10.43.166.99) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org vsock enables communication between virtual machines and the host they are running on. With the multi transport support (guest->host and host->guest), nested VMs can also use vsock channels for communication. In addition to this, by default, all the vsock packets are forwarded to the host, if no host->guest transport is loaded. This behavior can be implicitly used for enabling vsock communication between sibling VMs. Add a flags field in the vsock address data structure that can be used to explicitly mark the vsock connection as being targeted for a certain type of communication. This way, can distinguish between different use cases such as nested VMs and sibling VMs. This field can be set when initializing the vsock address variable used for the connect() call. Changelog v2 -> v3 * Add "svm_flags" as a new field, not reusing "svm_reserved1". v1 -> v2 * Update the field name to "svm_flags". * Split the current patch in 2 patches. Signed-off-by: Andra Paraschiv Reviewed-by: Stefano Garzarella --- include/uapi/linux/vm_sockets.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/vm_sockets.h b/include/uapi/linux/vm_sockets.h index fd0ed7221645d..619f8e9d55ca4 100644 --- a/include/uapi/linux/vm_sockets.h +++ b/include/uapi/linux/vm_sockets.h @@ -148,10 +148,13 @@ struct sockaddr_vm { unsigned short svm_reserved1; unsigned int svm_port; unsigned int svm_cid; + unsigned short svm_flags; unsigned char svm_zero[sizeof(struct sockaddr) - sizeof(sa_family_t) - sizeof(unsigned short) - - sizeof(unsigned int) - sizeof(unsigned int)]; + sizeof(unsigned int) - + sizeof(unsigned int) - + sizeof(unsigned short)]; }; #define IOCTL_VM_SOCKETS_GET_LOCAL_CID _IO(7, 0xb9)