From patchwork Thu Sep 15 09:57:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Machon X-Patchwork-Id: 12977184 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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 622ACC6FA90 for ; Thu, 15 Sep 2022 09:52:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230144AbiIOJwK (ORCPT ); Thu, 15 Sep 2022 05:52:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58004 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230146AbiIOJvf (ORCPT ); Thu, 15 Sep 2022 05:51:35 -0400 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9B8063FD for ; Thu, 15 Sep 2022 02:49:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1663235375; x=1694771375; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=io1IH4Xu1EcTG4ruCCsj7kpMT7olyb6SnqA2sc/qKqI=; b=oydoyu39gvH2OpKDdqG5eV8EgMWbIz0RLbH8JciWmqJq6RUQ7gmVQkAZ B15TJQD66H4a3RauCV6qat36PUETzAb05i6th9QHdPtsI0KFeCLChVvrK kNgsAcMatyliG9c2qI9XrbU6v/KtwiQyhBpqHqyX7P9jnszGAZeEoAN8v yGAzJLSZyw/MAicujAdMDYY7n1lQrFags1Q94A1XWZS0a2zfp9PMxFzgF WZTh0b/6F+px4wgShxFInFmjG0CTCwvvR88q/n64bxQfaL7rrqXmBGK2l z7WjO0UZM4USJl2o4vqXaKG+/h95AfDcdVjY6YUE0Nx8ojaZtRvy83Vcx A==; X-IronPort-AV: E=Sophos;i="5.93,317,1654585200"; d="scan'208";a="177279634" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 15 Sep 2022 02:49:11 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Thu, 15 Sep 2022 02:49:09 -0700 Received: from DEN-LT-70577.microchip.com (10.10.115.15) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Thu, 15 Sep 2022 02:49:07 -0700 From: Daniel Machon To: CC: , , , , , , , , Daniel Machon Subject: [RFC PATCH v2 net-next 2/2] net: dcb: add new apptrust attribute Date: Thu, 15 Sep 2022 11:57:57 +0200 Message-ID: <20220915095757.2861822-3-daniel.machon@microchip.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220915095757.2861822-1-daniel.machon@microchip.com> References: <20220915095757.2861822-1-daniel.machon@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Add new apptrust extension attributes to the 8021Qaz APP managed object. Two new attributes, DCB_ATTR_DCB_APP_TRUST_TABLE and DCB_ATTR_DCB_APP_TRUST, has been added. Trusted selectors are passed in the nested attribute (TRUST_TABLE), in order of precedence. The new attributes are meant to allow drivers, whose hw supports the notion of trust, to be able to set whether a particular app selector is to be trusted - and also the order of precedence of selectors. Signed-off-by: Daniel Machon --- include/net/dcbnl.h | 4 +++ include/uapi/linux/dcbnl.h | 4 +++ net/dcb/dcbnl.c | 64 ++++++++++++++++++++++++++++++++++++-- 3 files changed, 69 insertions(+), 3 deletions(-) diff --git a/include/net/dcbnl.h b/include/net/dcbnl.h index 2b2d86fb3131..8841ab6c2de7 100644 --- a/include/net/dcbnl.h +++ b/include/net/dcbnl.h @@ -109,6 +109,10 @@ struct dcbnl_rtnl_ops { /* buffer settings */ int (*dcbnl_getbuffer)(struct net_device *, struct dcbnl_buffer *); int (*dcbnl_setbuffer)(struct net_device *, struct dcbnl_buffer *); + + /* apptrust */ + int (*dcbnl_setapptrust)(struct net_device *, u8 *, int); + int (*dcbnl_getapptrust)(struct net_device *, u8 *, int *); }; #endif /* __NET_DCBNL_H__ */ diff --git a/include/uapi/linux/dcbnl.h b/include/uapi/linux/dcbnl.h index 8eab16e5bc13..ede72aefd88f 100644 --- a/include/uapi/linux/dcbnl.h +++ b/include/uapi/linux/dcbnl.h @@ -248,6 +248,8 @@ struct dcb_app { __u16 protocol; }; +#define IEEE_8021QAZ_APP_SEL_MAX 255 + /** * struct dcb_peer_app_info - APP feature information sent by the peer * @@ -419,6 +421,8 @@ enum ieee_attrs { DCB_ATTR_IEEE_QCN, DCB_ATTR_IEEE_QCN_STATS, DCB_ATTR_DCB_BUFFER, + DCB_ATTR_DCB_APP_TRUST_TABLE, + DCB_ATTR_DCB_APP_TRUST, __DCB_ATTR_IEEE_MAX }; #define DCB_ATTR_IEEE_MAX (__DCB_ATTR_IEEE_MAX - 1) diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c index dc4fb699b56c..6f5d2b295d09 100644 --- a/net/dcb/dcbnl.c +++ b/net/dcb/dcbnl.c @@ -166,6 +166,7 @@ static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = { [DCB_ATTR_IEEE_QCN] = {.len = sizeof(struct ieee_qcn)}, [DCB_ATTR_IEEE_QCN_STATS] = {.len = sizeof(struct ieee_qcn_stats)}, [DCB_ATTR_DCB_BUFFER] = {.len = sizeof(struct dcbnl_buffer)}, + [DCB_ATTR_DCB_APP_TRUST_TABLE] = {.type = NLA_NESTED}, }; /* DCB number of traffic classes nested attributes. */ @@ -1030,11 +1031,11 @@ static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb, /* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb GET commands. */ static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev) { - struct nlattr *ieee, *app; + struct nlattr *ieee, *app, *apptrust; struct dcb_app_type *itr; const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops; int dcbx; - int err; + int err, i; if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name)) return -EMSGSIZE; @@ -1133,6 +1134,24 @@ static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev) spin_unlock_bh(&dcb_lock); nla_nest_end(skb, app); + if (ops->dcbnl_getapptrust) { + u8 selectors[IEEE_8021QAZ_APP_SEL_MAX + 1] = {0}; + int nselectors; + + apptrust = nla_nest_start_noflag(skb, + DCB_ATTR_DCB_APP_TRUST_TABLE); + if (!app) + return -EMSGSIZE; + + err = ops->dcbnl_getapptrust(netdev, selectors, &nselectors); + if (err) + return -EMSGSIZE; + + for (i = 0; i < nselectors; i++) + nla_put_u8(skb, DCB_ATTR_DCB_APP_TRUST, selectors[i]); + nla_nest_end(skb, apptrust); + } + /* get peer info if available */ if (ops->ieee_peer_getets) { struct ieee_ets ets; @@ -1427,7 +1446,7 @@ static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh, const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops; struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1]; int prio; - int err; + int err, i; if (!ops) return -EOPNOTSUPP; @@ -1513,6 +1532,45 @@ static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh, } } + if (ieee[DCB_ATTR_DCB_APP_TRUST_TABLE]) { + u8 selectors[IEEE_8021QAZ_APP_SEL_MAX + 1] = {0}; + struct nlattr *attr; + int nselectors = 0; + u8 selector; + + int rem; + + if (!ops->dcbnl_setapptrust) { + err = -EOPNOTSUPP; + goto err; + } + + nla_for_each_nested(attr, ieee[DCB_ATTR_DCB_APP_TRUST_TABLE], + rem) { + if (nla_type(attr) != DCB_ATTR_DCB_APP_TRUST || + nla_len(attr) != 1 || + nselectors >= sizeof(selectors)) { + err = -EINVAL; + goto err; + } + + selector = nla_get_u8(attr); + /* Duplicate selector ? */ + for (i = 0; i < nselectors; i++) { + if (selectors[i] == selector) { + err = -EINVAL; + goto err; + } + } + + selectors[nselectors++] = selector; + } + + err = ops->dcbnl_setapptrust(netdev, selectors, nselectors); + if (err) + goto err; + } + err: err = nla_put_u8(skb, DCB_ATTR_IEEE, err); dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);