From patchwork Mon Oct 24 09:13:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Machon X-Patchwork-Id: 13016869 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 55674C38A2D for ; Mon, 24 Oct 2022 09:05:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231189AbiJXJFa (ORCPT ); Mon, 24 Oct 2022 05:05:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44578 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231160AbiJXJFA (ORCPT ); Mon, 24 Oct 2022 05:05:00 -0400 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E13BD5301F; Mon, 24 Oct 2022 02:04:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1666602287; x=1698138287; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=paFQBNdBP7BixYQNayx0cyhauA0sVaOcBJBm5gLVaag=; b=D7cO3sne1tksI8s8N5jfqiuJN1NgS1NFfIIyhA+Fb1+9zOCibmgECvHL MZBRRuTzyQKwxN/OEC1qMJgAS3n1+ZBs8nWenG7piTxXlzSPMqQVyj54F VBV8Fkuvf4R3tJFyclnDIA/zezUKzqWZsBOkX8vvKXDy+HHVlPpQIMdtY XLLxhEcvsqhs1xsWVhfXGhsGI1A+x7T2PaiAk9CqIRTOmk2j4zG7uE3eA CBGy2Q1P2KYRE+oB7nD+wa1HXiqLYqJCgB4k+wtC1NXLDKJWGxjB/IjwS iP49ZR0b1WFnpNCIYDsGs+CznEk9f3WgvRp1hIz1YAdSpmyhCm6vktOd/ g==; X-IronPort-AV: E=Sophos;i="5.95,207,1661842800"; d="scan'208";a="183600925" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 24 Oct 2022 02:04:38 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Mon, 24 Oct 2022 02:04:36 -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; Mon, 24 Oct 2022 02:04:33 -0700 From: Daniel Machon To: CC: , , , , , , , , , , , , , , , , , Subject: [net-next v3 2/6] net: dcb: add new apptrust attribute Date: Mon, 24 Oct 2022 11:13:29 +0200 Message-ID: <20221024091333.1048061-3-daniel.machon@microchip.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221024091333.1048061-1-daniel.machon@microchip.com> References: <20221024091333.1048061-1-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 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 DCB_ATTR_DCB_APP_TRUST, 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 trusted - and in which order. Signed-off-by: Daniel Machon --- include/net/dcbnl.h | 4 ++ include/uapi/linux/dcbnl.h | 10 +++++ net/dcb/dcbnl.c | 77 ++++++++++++++++++++++++++++++++++++-- 3 files changed, 87 insertions(+), 4 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 dc7ef96207ca..9344e3ba5768 100644 --- a/include/uapi/linux/dcbnl.h +++ b/include/uapi/linux/dcbnl.h @@ -410,6 +410,7 @@ enum dcbnl_attrs { * @DCB_ATTR_IEEE_PEER_ETS: peer ETS configuration - get only * @DCB_ATTR_IEEE_PEER_PFC: peer PFC configuration - get only * @DCB_ATTR_IEEE_PEER_APP: peer APP tlv - get only + * @DCB_ATTR_DCB_APP_TRUST_TABLE: selector trust table */ enum ieee_attrs { DCB_ATTR_IEEE_UNSPEC, @@ -423,6 +424,7 @@ enum ieee_attrs { DCB_ATTR_IEEE_QCN, DCB_ATTR_IEEE_QCN_STATS, DCB_ATTR_DCB_BUFFER, + DCB_ATTR_DCB_APP_TRUST_TABLE, __DCB_ATTR_IEEE_MAX }; #define DCB_ATTR_IEEE_MAX (__DCB_ATTR_IEEE_MAX - 1) @@ -435,6 +437,14 @@ enum ieee_attrs_app { }; #define DCB_ATTR_IEEE_APP_MAX (__DCB_ATTR_IEEE_APP_MAX - 1) +enum dcbnl_attrs_apptrust { + DCB_ATTR_DCB_APP_TRUST_UNSPEC, + DCB_ATTR_DCB_APP_TRUST, + __DCB_ATTR_DCB_APP_TRUST_MAX +}; + +#define DCB_ATTR_DCB_APP_TRUST_MAX (__DCB_ATTR_DCB_APP_TRUST_MAX - 1) + /** * enum cee_attrs - CEE DCBX get attributes. * diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c index 92c32bc11374..01310edf6d1b 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. */ @@ -1057,11 +1058,11 @@ 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 dcb_app_type *itr; const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops; + struct nlattr *ieee, *app, *apptrust; + struct dcb_app_type *itr; + int err, i; int dcbx; - int err; if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name)) return -EMSGSIZE; @@ -1161,6 +1162,24 @@ 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(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; @@ -1454,8 +1473,8 @@ 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 err, i; int prio; - int err; if (!ops) return -EOPNOTSUPP; @@ -1541,6 +1560,56 @@ 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); + switch (selector) { + case IEEE_8021QAZ_APP_SEL_ETHERTYPE: + case IEEE_8021QAZ_APP_SEL_STREAM: + case IEEE_8021QAZ_APP_SEL_DGRAM: + case IEEE_8021QAZ_APP_SEL_ANY: + case IEEE_8021QAZ_APP_SEL_DSCP: + case DCB_APP_SEL_PCP: + break; + default: + err = -EINVAL; + goto err; + } + /* 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);