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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 15868C7618B for ; Fri, 26 Jul 2019 16:41:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CB6D02147A for ; Fri, 26 Jul 2019 16:41:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=quantenna.com header.i=@quantenna.com header.b="N7s/nM98" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727753AbfGZQlr (ORCPT ); Fri, 26 Jul 2019 12:41:47 -0400 Received: from mx0b-00183b01.pphosted.com ([67.231.157.42]:45840 "EHLO mx0a-00183b01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727343AbfGZQlq (ORCPT ); Fri, 26 Jul 2019 12:41:46 -0400 Received: from pps.filterd (m0059811.ppops.net [127.0.0.1]) by mx0b-00183b01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x6QGe2Cb007061; Fri, 26 Jul 2019 10:40:02 -0600 Received: from nam01-sn1-obe.outbound.protection.outlook.com (mail-sn1nam01lp2053.outbound.protection.outlook.com [104.47.32.53]) by mx0b-00183b01.pphosted.com with ESMTP id 2tywkqrwj4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 26 Jul 2019 10:40:02 -0600 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Q1oFd1QBnAC4h9te+8fsbGycqEjzJz4LfsDsDzHpAbcDwNLuhwuzclJ/2ia5tpCE9U2e+OORkrLAsqWLGWVnLCgZJv9F58929jwL08p0Lze2hP3ALMC+RQZPGT8VtIqHramfQDy9WWsrYXSgTsz5kuU7AW/SPo7imWSMUwscEmkEDxhBGdWlGVIsUzBySMQWcjVNL537Aqp/IsrVkjTjIcHqZnKpg1fVB0pZiMpWytq7Buzv1x994nJqcebZ9rXMVeQlSKKoMeQHaKUtA6UGtdvCUjlYzOCKptv8fgwADUitZ8dyRkG9qM0iP+sZyy8uCB6+hbjRIlEoFNC/XCxUUw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=OCqhU2B+pNM5h8DdqOZ2JeOJdTopWQ2Hsj/cFiao3mA=; b=BOws8r4j3q+3dEElBZ+FfLZq86D06K0lMzAx3WxtzEsijx4BbWtQtBvpwua+II278KxhBs/WVwTg6vPUoZknBTy0lzZwFGyv0NzqQr6ciku/O+jzNQpGlXprxxqXnEOExJD02fqUpi5MoQZT2C7OhoNm5mNpA1oF16ZItvrYKl7Hp9CMQ0t+WXW/Y/66XugxsdVlX2tu5gNSAO/2hLxDVhZD+P56U5dzkKtPe6d52mXUgnxnl5WiqbuRqIIS5Zt0tX6zWdhMnxwp8dVZ2ZkBsVteYD7pL1zVMLaDwU+GDtM9tJOchm2kHzV4Z9xZcoAjcW4fl/3Q1WR+SkIWF0kmdw== ARC-Authentication-Results: i=1; mx.microsoft.com 1;spf=pass smtp.mailfrom=quantenna.com;dmarc=pass action=none header.from=quantenna.com;dkim=pass header.d=quantenna.com;arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quantenna.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=OCqhU2B+pNM5h8DdqOZ2JeOJdTopWQ2Hsj/cFiao3mA=; b=N7s/nM98VlQMesO0zuXbqihQZ8bvY2Slc0TzV/UoxYTW55i+H2xF9qhmveuBYPsy6lTneLMsZ89HRjhreGZNdn9eq94y9kCt9l2XRlgbEM5Ds1J51RlK/A5RlII7ErYQhEoX+EM7k3Q5pTeP+Z0g/291RAgmAv3cDFIr9YgvSW0= Received: from SN6PR05MB4703.namprd05.prod.outlook.com (52.135.114.213) by SN6PR05MB4959.namprd05.prod.outlook.com (20.177.249.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2136.9; Fri, 26 Jul 2019 16:40:00 +0000 Received: from SN6PR05MB4703.namprd05.prod.outlook.com ([fe80::78b3:7cea:d0b6:d11]) by SN6PR05MB4703.namprd05.prod.outlook.com ([fe80::78b3:7cea:d0b6:d11%5]) with mapi id 15.20.2115.005; Fri, 26 Jul 2019 16:40:00 +0000 Received: from BYAPR05MB4917.namprd05.prod.outlook.com (52.135.235.159) by BYAPR05MB4327.namprd05.prod.outlook.com (52.135.202.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2115.10; Fri, 26 Jul 2019 16:39:32 +0000 Received: from BYAPR05MB4917.namprd05.prod.outlook.com ([fe80::a5aa:dcd6:2812:334e]) by BYAPR05MB4917.namprd05.prod.outlook.com ([fe80::a5aa:dcd6:2812:334e%5]) with mapi id 15.20.2115.005; Fri, 26 Jul 2019 16:39:32 +0000 From: Sergey Matyukevich To: "linux-wireless@vger.kernel.org" CC: Johannes Berg , Igor Mitsyanko , Mikhail Karpenko , Sergey Matyukevich Subject: [PATCH v4 1/2] cfg80211: refactor cfg80211_bss_update Thread-Topic: [PATCH v4 1/2] cfg80211: refactor cfg80211_bss_update Thread-Index: AQHVQ9CzMkyU2IXzSEuwiE76ToNQiw== Date: Fri, 26 Jul 2019 16:39:32 +0000 Message-ID: <20190726163922.27509-2-sergey.matyukevich.os@quantenna.com> References: <20190726163922.27509-1-sergey.matyukevich.os@quantenna.com> In-Reply-To: <20190726163922.27509-1-sergey.matyukevich.os@quantenna.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BYAPR06CA0011.namprd06.prod.outlook.com (2603:10b6:a03:d4::24) To BYAPR05MB4917.namprd05.prod.outlook.com (2603:10b6:a03:42::31) x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.11.0 x-originating-ip: [195.182.157.78] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 57199ce3-c55c-4f9d-847c-08d711e7d5c9 x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020);SRVR:BYAPR05MB4327; x-ms-traffictypediagnostic: BYAPR05MB4327:|SN6PR05MB4959: x-microsoft-antispam-prvs: x-moderation-data: 7/26/2019 4:39:58 PM x-ms-oob-tlc-oobclassifiers: OLM:8273; x-forefront-prvs: 01106E96F6 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(396003)(136003)(366004)(376002)(346002)(39850400004)(189003)(199004)(6506007)(6436002)(2501003)(5640700003)(53936002)(386003)(107886003)(6512007)(102836004)(2906002)(99286004)(7736002)(86362001)(2616005)(71190400001)(4326008)(6916009)(186003)(6116002)(66066001)(25786009)(478600001)(14454004)(3846002)(103116003)(316002)(76176011)(54906003)(5660300002)(26005)(8936002)(1076003)(36756003)(50226002)(8676002)(66446008)(81166006)(66476007)(81156014)(68736007)(66556008)(64756008)(2351001)(476003)(71200400001)(446003)(436003)(66946007)(11346002)(52116002)(14444005)(486006)(305945005)(6486002)(256004);DIR:OUT;SFP:1101;SCL:1;SRVR:SN6PR05MB4959;H:SN6PR05MB4703.namprd05.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: quantenna.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: Hhl9YemNdSCFb22+TqSmpBzVwN1b3yIcYNNmwFQamQFKmhBoMZmDZ7Ed7kBu0vulbTTR/OqUvROJUEX234PLLCs5IUMvK+g1T50vhJbnUJIB9ryIMHoEUKILThLkqpCLlqeCXJSXf01NMeA0lJYkmEFfCSu6/1+A7o7JjQz4sEqYSke7Y9VjOn1MtztlO/suyQeY45N/f6TbwXXAXo+gV8UahN+TA8n8V+k5qHW5BIfyFy+egVGEsJaOzfMbdO3XYb/DgNo7bpqJcLekTQWRHMph5HOTS7Gxy4VkDr6NGOhTo8LYDbBtHRl/gVco5D5pbm/OMOEqp8eSiwRosS9H4CBybGu/ONQfghyPqBY3NM6XhaLuLf9ofpDFwaXxphTwKqnU460Q8Qc5++2IpChdpAzAqCknjrwTb/QTY+GZ9+w= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: quantenna.com X-MS-Exchange-CrossTenant-Network-Message-Id: 57199ce3-c55c-4f9d-847c-08d711e7d5c9 X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a355dbce-62b4-4789-9446-c1d5582180ff X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: SPO_Arbitration_d3241082-88d9-4157-85a8-5a9c8795aa9d@quantenna.onmicrosoft.com X-MS-Exchange-CrossTenant-originalarrivaltime: 26 Jul 2019 16:40:00.1739 (UTC) X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR05MB4959 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-07-26_12:,, signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=986 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1907260203 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org This patch implements minor refactoring for cfg80211_bss_update function. Code path for updating known BSS is extracted into dedicated cfg80211_update_known_bss function. Signed-off-by: Sergey Matyukevich --- net/wireless/scan.c | 171 +++++++++++++++++++++++++++---------------------= ---- 1 file changed, 89 insertions(+), 82 deletions(-) diff --git a/net/wireless/scan.c b/net/wireless/scan.c index a98dabab557a..9119f5ce3677 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -1091,6 +1091,93 @@ struct cfg80211_non_tx_bss { u8 bssid_index; }; =20 +static bool +cfg80211_update_known_bss(struct cfg80211_registered_device *rdev, + struct cfg80211_internal_bss *known, + struct cfg80211_internal_bss *new, + bool signal_valid) +{ + lockdep_assert_held(&rdev->bss_lock); + + /* Update IEs */ + if (rcu_access_pointer(new->pub.proberesp_ies)) { + const struct cfg80211_bss_ies *old; + + old =3D rcu_access_pointer(known->pub.proberesp_ies); + + rcu_assign_pointer(known->pub.proberesp_ies, + new->pub.proberesp_ies); + /* Override possible earlier Beacon frame IEs */ + rcu_assign_pointer(known->pub.ies, + new->pub.proberesp_ies); + if (old) + kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head); + } else if (rcu_access_pointer(new->pub.beacon_ies)) { + const struct cfg80211_bss_ies *old; + struct cfg80211_internal_bss *bss; + + if (known->pub.hidden_beacon_bss && + !list_empty(&known->hidden_list)) { + const struct cfg80211_bss_ies *f; + + /* The known BSS struct is one of the probe + * response members of a group, but we're + * receiving a beacon (beacon_ies in the new + * bss is used). This can only mean that the + * AP changed its beacon from not having an + * SSID to showing it, which is confusing so + * drop this information. + */ + + f =3D rcu_access_pointer(new->pub.beacon_ies); + kfree_rcu((struct cfg80211_bss_ies *)f, rcu_head); + return false; + } + + old =3D rcu_access_pointer(known->pub.beacon_ies); + + rcu_assign_pointer(known->pub.beacon_ies, new->pub.beacon_ies); + + /* Override IEs if they were from a beacon before */ + if (old =3D=3D rcu_access_pointer(known->pub.ies)) + rcu_assign_pointer(known->pub.ies, new->pub.beacon_ies); + + /* Assign beacon IEs to all sub entries */ + list_for_each_entry(bss, &known->hidden_list, hidden_list) { + const struct cfg80211_bss_ies *ies; + + ies =3D rcu_access_pointer(bss->pub.beacon_ies); + WARN_ON(ies !=3D old); + + rcu_assign_pointer(bss->pub.beacon_ies, + new->pub.beacon_ies); + } + + if (old) + kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head); + } + + known->pub.beacon_interval =3D new->pub.beacon_interval; + + /* don't update the signal if beacon was heard on + * adjacent channel. + */ + if (signal_valid) + known->pub.signal =3D new->pub.signal; + known->pub.capability =3D new->pub.capability; + known->ts =3D new->ts; + known->ts_boottime =3D new->ts_boottime; + known->parent_tsf =3D new->parent_tsf; + known->pub.chains =3D new->pub.chains; + memcpy(known->pub.chain_signal, new->pub.chain_signal, + IEEE80211_MAX_CHAINS); + ether_addr_copy(known->parent_bssid, new->parent_bssid); + known->pub.max_bssid_indicator =3D new->pub.max_bssid_indicator; + known->pub.bssid_index =3D new->pub.bssid_index; + + return true; +} + /* Returned bss is reference counted and must be cleaned up appropriately.= */ struct cfg80211_internal_bss * cfg80211_bss_update(struct cfg80211_registered_device *rdev, @@ -1114,88 +1201,8 @@ cfg80211_bss_update(struct cfg80211_registered_devic= e *rdev, found =3D rb_find_bss(rdev, tmp, BSS_CMP_REGULAR); =20 if (found) { - /* Update IEs */ - if (rcu_access_pointer(tmp->pub.proberesp_ies)) { - const struct cfg80211_bss_ies *old; - - old =3D rcu_access_pointer(found->pub.proberesp_ies); - - rcu_assign_pointer(found->pub.proberesp_ies, - tmp->pub.proberesp_ies); - /* Override possible earlier Beacon frame IEs */ - rcu_assign_pointer(found->pub.ies, - tmp->pub.proberesp_ies); - if (old) - kfree_rcu((struct cfg80211_bss_ies *)old, - rcu_head); - } else if (rcu_access_pointer(tmp->pub.beacon_ies)) { - const struct cfg80211_bss_ies *old; - struct cfg80211_internal_bss *bss; - - if (found->pub.hidden_beacon_bss && - !list_empty(&found->hidden_list)) { - const struct cfg80211_bss_ies *f; - - /* - * The found BSS struct is one of the probe - * response members of a group, but we're - * receiving a beacon (beacon_ies in the tmp - * bss is used). This can only mean that the - * AP changed its beacon from not having an - * SSID to showing it, which is confusing so - * drop this information. - */ - - f =3D rcu_access_pointer(tmp->pub.beacon_ies); - kfree_rcu((struct cfg80211_bss_ies *)f, - rcu_head); - goto drop; - } - - old =3D rcu_access_pointer(found->pub.beacon_ies); - - rcu_assign_pointer(found->pub.beacon_ies, - tmp->pub.beacon_ies); - - /* Override IEs if they were from a beacon before */ - if (old =3D=3D rcu_access_pointer(found->pub.ies)) - rcu_assign_pointer(found->pub.ies, - tmp->pub.beacon_ies); - - /* Assign beacon IEs to all sub entries */ - list_for_each_entry(bss, &found->hidden_list, - hidden_list) { - const struct cfg80211_bss_ies *ies; - - ies =3D rcu_access_pointer(bss->pub.beacon_ies); - WARN_ON(ies !=3D old); - - rcu_assign_pointer(bss->pub.beacon_ies, - tmp->pub.beacon_ies); - } - - if (old) - kfree_rcu((struct cfg80211_bss_ies *)old, - rcu_head); - } - - found->pub.beacon_interval =3D tmp->pub.beacon_interval; - /* - * don't update the signal if beacon was heard on - * adjacent channel. - */ - if (signal_valid) - found->pub.signal =3D tmp->pub.signal; - found->pub.capability =3D tmp->pub.capability; - found->ts =3D tmp->ts; - found->ts_boottime =3D tmp->ts_boottime; - found->parent_tsf =3D tmp->parent_tsf; - found->pub.chains =3D tmp->pub.chains; - memcpy(found->pub.chain_signal, tmp->pub.chain_signal, - IEEE80211_MAX_CHAINS); - ether_addr_copy(found->parent_bssid, tmp->parent_bssid); - found->pub.max_bssid_indicator =3D tmp->pub.max_bssid_indicator; - found->pub.bssid_index =3D tmp->pub.bssid_index; + if (!cfg80211_update_known_bss(rdev, found, tmp, signal_valid)) + goto drop; } else { struct cfg80211_internal_bss *new; struct cfg80211_internal_bss *hidden; --=20 2.11.0