From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 4DEEBECDE4B for ; Thu, 8 Nov 2018 22:04:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1204D208A3 for ; Thu, 8 Nov 2018 22:04:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="VdMR/+Ay" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1204D208A3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731347AbeKIHll (ORCPT ); Fri, 9 Nov 2018 02:41:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:33360 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727984AbeKIHlk (ORCPT ); Fri, 9 Nov 2018 02:41:40 -0500 Received: from localhost (unknown [208.72.13.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 932C520844; Thu, 8 Nov 2018 22:04:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541714650; bh=jNrj7N0IdW2yYLU3csbHdj3bjbypHl/R0LYXxh7dXmM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VdMR/+AyJxPKgxru/tUxGT8iHVLYPUtqoEtu+88nIALuP3i3Au0MuRhlbJce+55X5 qJn4Tzi/wcSRN2wtqwfDegB3grnZfI/dRRQwJkS6BGj72gL4JNmDZ4ALfAneM0KPWb wZVvnbzg+nkAzaG9YQ09ZQdyGZzZDDKz/baIcTM0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Noa Osherovich , Moni Shoua , Leon Romanovsky , Doug Ledford , Sasha Levin Subject: [PATCH 4.9 046/171] IB/core: Fix the validations of a multicast LID in attach or detach operations Date: Thu, 8 Nov 2018 13:50:16 -0800 Message-Id: <20181108215130.847648701@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181108215127.257643509@linuxfoundation.org> References: <20181108215127.257643509@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 5236333592244557a19694a51337df6ac018f0a7 ] RoCE Annex (A16.9.10/11) declares that during attach (detach) QP to a multicast group, if the QP is associated with a RoCE port, the multicast group MLID is unused and is ignored. During attach or detach multicast, when the QP is associated with a port, it is enough to check the port's link layer and validate the LID only if it is Infiniband. Otherwise, avoid validating the multicast LID. Fixes: 8561eae60ff9 ("IB/core: For multicast functions, verify that LIDs are multicast LIDs") Signed-off-by: Noa Osherovich Reviewed-by: Moni Shoua Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford Signed-off-by: Sasha Levin --- drivers/infiniband/core/verbs.c | 44 ++++++++++++++++++++++++++++++--- 1 file changed, 40 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 0e64b52af5b2..d28c4cf7c1ee 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -1510,6 +1510,44 @@ EXPORT_SYMBOL(ib_dealloc_fmr); /* Multicast groups */ +static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid) +{ + struct ib_qp_init_attr init_attr = {}; + struct ib_qp_attr attr = {}; + int num_eth_ports = 0; + int port; + + /* If QP state >= init, it is assigned to a port and we can check this + * port only. + */ + if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) { + if (attr.qp_state >= IB_QPS_INIT) { + if (qp->device->get_link_layer(qp->device, attr.port_num) != + IB_LINK_LAYER_INFINIBAND) + return true; + goto lid_check; + } + } + + /* Can't get a quick answer, iterate over all ports */ + for (port = 0; port < qp->device->phys_port_cnt; port++) + if (qp->device->get_link_layer(qp->device, port) != + IB_LINK_LAYER_INFINIBAND) + num_eth_ports++; + + /* If we have at lease one Ethernet port, RoCE annex declares that + * multicast LID should be ignored. We can't tell at this step if the + * QP belongs to an IB or Ethernet port. + */ + if (num_eth_ports) + return true; + + /* If all the ports are IB, we can check according to IB spec. */ +lid_check: + return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || + lid == be16_to_cpu(IB_LID_PERMISSIVE)); +} + int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) { int ret; @@ -1517,8 +1555,7 @@ int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) if (!qp->device->attach_mcast) return -ENOSYS; if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD || - lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || - lid == be16_to_cpu(IB_LID_PERMISSIVE)) + !is_valid_mcast_lid(qp, lid)) return -EINVAL; ret = qp->device->attach_mcast(qp, gid, lid); @@ -1535,8 +1572,7 @@ int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) if (!qp->device->detach_mcast) return -ENOSYS; if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD || - lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || - lid == be16_to_cpu(IB_LID_PERMISSIVE)) + !is_valid_mcast_lid(qp, lid)) return -EINVAL; ret = qp->device->detach_mcast(qp, gid, lid); -- 2.17.1