From patchwork Mon Nov 14 20:19:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aloka Dixit X-Patchwork-Id: 13042791 X-Patchwork-Delegate: johannes@sipsolutions.net 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 47B1DC43219 for ; Mon, 14 Nov 2022 20:19:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237541AbiKNUT3 (ORCPT ); Mon, 14 Nov 2022 15:19:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237480AbiKNUT1 (ORCPT ); Mon, 14 Nov 2022 15:19:27 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3E1264D7 for ; Mon, 14 Nov 2022 12:19:25 -0800 (PST) Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2AEGCcAJ004775; Mon, 14 Nov 2022 20:19:23 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=z7d4cJXbcpH/yaETSN31zaww4Q+Q/pGdHsMA3y/rAEI=; b=iDZx0plp9DJznlYx1+hy5BvsqnqF/Wl1rjXjC56PtEy1CV6lSJewPo6ud10z4UqZHZmJ CjffN+Qf8xMYrdId4GnOQtwXdH7CNP8tJZeR1dzzYBVKoaqGYtXT7nS9VhOiFJ3OCGaR roXZF2uhDgYRGE9MLT8OVDIFAtk2knHYz+pxSYDC5mt7uwwUKixZwp/wofL3+8Rnigzf kFX1bAPOQXUV0jBetgpHalyUh5a4PStUVwIpoyJx/ACfEfbc6KARpBJCTTXKjAk1VOwc pWEwJFZ3FnkujQH1btmgt0MSnkiVc1L3W4hkRZCZi8jaFpG/ePYk4J92rTsPw32gmkuf 6g== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3kugkpj66y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 14 Nov 2022 20:19:22 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 2AEKJL9b025231 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 14 Nov 2022 20:19:21 GMT Received: from alokad-linux.qualcomm.com (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.29; Mon, 14 Nov 2022 12:19:21 -0800 From: Aloka Dixit To: , Subject: [PATCH v2 01/10] mac80211: generate EMA beacons in AP mode Date: Mon, 14 Nov 2022 12:19:03 -0800 Message-ID: <20221114201912.22893-2-quic_alokad@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221114201912.22893-1-quic_alokad@quicinc.com> References: <20221114201912.22893-1-quic_alokad@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 2oEQazBCd1TcDYWt7Dm-Egub0yevi5Dx X-Proofpoint-GUID: 2oEQazBCd1TcDYWt7Dm-Egub0yevi5Dx X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-14_13,2022-11-11_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 spamscore=0 clxscore=1015 suspectscore=0 mlxlogscore=999 malwarescore=0 bulkscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211140143 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Add APIs to generate an array of beacons for an EMA AP (enhanced multiple BSSID advertisements), each including a single MBSSID element. EMA profile periodicity equals the count of elements. - ieee80211_beacon_get_template_ema_list() - Generate and return all EMA beacon templates. Drivers must call ieee80211_beacon_free_ema_list() to free the memory. No change in the prototype for the existing API, ieee80211_beacon_get_template(), which should be used for non-EMA AP. - ieee80211_beacon_get_template_ema_index() - Generate a beacon which includes the multiple BSSID element at the given index. Drivers can use this function in a loop until NULL is returned which indicates end of available MBSSID elements. - ieee80211_beacon_free_ema_list() - free the memory allocated for the list of EMA beacon templates. Modify exsiting functions ieee80211_beacon_get_ap(), ieee80211_get_mbssid_beacon_len() and ieee80211_beacon_add_mbssid() to accept a new parameter for EMA index. Signed-off-by: Aloka Dixit Co-developed-by: John Crispin Signed-off-by: John Crispin --- v2: - Limited the use of IEEE80211_INCLUDE_ALL_MBSSID_ELEMS to only __ieee80211_beacon_get and its callers. Remaining functions now use existing MBSSID element count (u8) to decide between EMA vs non-EMA beacon generation. Macro cannot removed completely as the callers of __ieee80211_beacon_get() do not have access to the beacon pointer containing MBSSID count. - Changed the prototype of ema_index in all function except __ieee80211_beacon_get() from int to u8. - Modified ieee80211_beacon_get_ap_ema_list() to return a list of beacons. - Added WARN_ON() in ieee80211_beacon_get_ap_ema_list(). include/net/mac80211.h | 68 +++++++++++++++++++ net/mac80211/cfg.c | 7 +- net/mac80211/ieee80211_i.h | 10 ++- net/mac80211/tx.c | 134 ++++++++++++++++++++++++++++++++++--- 4 files changed, 202 insertions(+), 17 deletions(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 721c450a9ccd..ff37f8f46c34 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -5225,6 +5225,74 @@ ieee80211_beacon_get_template(struct ieee80211_hw *hw, struct ieee80211_mutable_offsets *offs, unsigned int link_id); +/** + * ieee80211_beacon_get_template_ema_index - EMA beacon template generation + * @hw: pointer obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback. + * @offs: &struct ieee80211_mutable_offsets pointer to struct that will + * receive the offsets that may be updated by the driver. + * @link_id: the link id to which the beacon belongs (or 0 for a non-MLD AP). + * @ema_index: index of the beacon in the EMA set. + * + * This function follows the same rules as ieee80211_beacon_get_template() + * but returns a beacon template which includes multiple BSSID element at the + * requested index. + * + * Return: The beacon template. %NULL indicates the end of EMA templates. + */ +struct sk_buff * +ieee80211_beacon_get_template_ema_index(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_mutable_offsets *offs, + unsigned int link_id, u8 ema_index); + +/** + * struct ieee80211_ema_beacons - List of EMA beacons + * @cnt: count of EMA beacons. + * + * @bcn: array of EMA beacons. + * @bcn.skb: the skb containing this specific beacon + * @bcn.offs: &struct ieee80211_mutable_offsets pointer to struct that will + * receive the offsets that may be updated by the driver. + */ +struct ieee80211_ema_beacons { + u8 cnt; + struct { + struct sk_buff *skb; + struct ieee80211_mutable_offsets offs; + } bcn[]; +}; + +/** + * ieee80211_beacon_get_template_ema_list - EMA beacon template generation + * @hw: pointer obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback. + * @link_id: the link id to which the beacon belongs (or 0 for a non-MLD AP) + * + * This function follows the same rules as ieee80211_beacon_get_template() + * but allocates and returns a pointer to list of all beacon templates required + * to cover all profiles in the multiple BSSID set. Each template includes only + * one multiple BSSID element. + * + * Driver must call ieee80211_beacon_free_ema_list() to free the memory. + * + * Return: EMA beacon templates of type struct ieee80211_ema_beacons *. + * %NULL on error. + */ +struct ieee80211_ema_beacons * +ieee80211_beacon_get_template_ema_list(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + unsigned int link_id); + +/** + * ieee80211_beacon_free_ema_list - free an EMA beacon template list + * @ema_beacons: list of EMA beacons of type &struct ieee80211_ema_beacons pointers. + * + * This function will free a list previously acquired by calling + * ieee80211_beacon_get_template_ema_list() + */ +void ieee80211_beacon_free_ema_list(struct ieee80211_ema_beacons *ema_beacons); + /** * ieee80211_beacon_get_tim - beacon generation function * @hw: pointer obtained from ieee80211_alloc_hw(). diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index c848fe04dd44..b60e8c835e46 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1121,11 +1121,11 @@ static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata, if (params->mbssid_ies) { mbssid = params->mbssid_ies; size += struct_size(new->mbssid_ies, elem, mbssid->cnt); - size += ieee80211_get_mbssid_beacon_len(mbssid); + size += ieee80211_get_mbssid_beacon_len(mbssid, mbssid->cnt); } else if (old && old->mbssid_ies) { mbssid = old->mbssid_ies; size += struct_size(new->mbssid_ies, elem, mbssid->cnt); - size += ieee80211_get_mbssid_beacon_len(mbssid); + size += ieee80211_get_mbssid_beacon_len(mbssid, mbssid->cnt); } new = kzalloc(size, GFP_KERNEL); @@ -3338,7 +3338,8 @@ cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon) len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len + beacon->proberesp_ies_len + beacon->assocresp_ies_len + beacon->probe_resp_len + beacon->lci_len + beacon->civicloc_len + - ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies); + ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies, + beacon->mbssid_ies->cnt); new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL); if (!new_beacon) diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 63ff0d2524b6..e6ee40866dfa 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1166,13 +1166,17 @@ ieee80211_vif_get_shift(struct ieee80211_vif *vif) } static inline int -ieee80211_get_mbssid_beacon_len(struct cfg80211_mbssid_elems *elems) +ieee80211_get_mbssid_beacon_len(struct cfg80211_mbssid_elems *elems, u8 i) { - int i, len = 0; + int len = 0; - if (!elems) + if (!elems || !elems->cnt || i > elems->cnt) return 0; + if (i < elems->cnt) + return elems->elem[i].len; + + /* i == elems->cnt, calculate total length of all MBSSID elements */ for (i = 0; i < elems->cnt; i++) len += elems->elem[i].len; diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index bb2e54610101..ac4a916e7573 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -5089,13 +5089,20 @@ ieee80211_beacon_get_finish(struct ieee80211_hw *hw, } static void -ieee80211_beacon_add_mbssid(struct sk_buff *skb, struct beacon_data *beacon) +ieee80211_beacon_add_mbssid(struct sk_buff *skb, struct beacon_data *beacon, + u8 i) { - int i; + if (!beacon->mbssid_ies || !beacon->mbssid_ies->cnt || + i > beacon->mbssid_ies->cnt) + return; - if (!beacon->mbssid_ies) + if (i < beacon->mbssid_ies->cnt) { + skb_put_data(skb, beacon->mbssid_ies->elem[i].data, + beacon->mbssid_ies->elem[i].len); return; + } + /* i == beacon->mbssid_ies->cnt, include all MBSSID elements */ for (i = 0; i < beacon->mbssid_ies->cnt; i++) skb_put_data(skb, beacon->mbssid_ies->elem[i].data, beacon->mbssid_ies->elem[i].len); @@ -5108,7 +5115,8 @@ ieee80211_beacon_get_ap(struct ieee80211_hw *hw, struct ieee80211_mutable_offsets *offs, bool is_template, struct beacon_data *beacon, - struct ieee80211_chanctx_conf *chanctx_conf) + struct ieee80211_chanctx_conf *chanctx_conf, + u8 ema_index) { struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); @@ -5127,7 +5135,9 @@ ieee80211_beacon_get_ap(struct ieee80211_hw *hw, /* headroom, head length, * tail length, maximum TIM length and multiple BSSID length */ - mbssid_len = ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies); + mbssid_len = ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies, + ema_index); + skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + beacon->tail_len + 256 + local->hw.extra_beacon_tailroom + mbssid_len); @@ -5145,7 +5155,7 @@ ieee80211_beacon_get_ap(struct ieee80211_hw *hw, offs->cntdwn_counter_offs[0] = beacon->cntdwn_counter_offsets[0]; if (mbssid_len) { - ieee80211_beacon_add_mbssid(skb, beacon); + ieee80211_beacon_add_mbssid(skb, beacon, ema_index); offs->mbssid_off = skb->len - mbssid_len; } @@ -5164,12 +5174,51 @@ ieee80211_beacon_get_ap(struct ieee80211_hw *hw, return skb; } +static struct ieee80211_ema_beacons * +ieee80211_beacon_get_ap_ema_list(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_link_data *link, + struct ieee80211_mutable_offsets *offs, + bool is_template, struct beacon_data *beacon, + struct ieee80211_chanctx_conf *chanctx_conf) +{ + struct ieee80211_ema_beacons *ema = NULL; + + if (!beacon->mbssid_ies || !beacon->mbssid_ies->cnt) + return NULL; + + ema = kzalloc(struct_size(ema, bcn, beacon->mbssid_ies->cnt), + GFP_ATOMIC); + if (!ema) + return NULL; + + for (ema->cnt = 0; ema->cnt < beacon->mbssid_ies->cnt; ema->cnt++) { + ema->bcn[ema->cnt].skb = + ieee80211_beacon_get_ap(hw, vif, link, + &ema->bcn[ema->cnt].offs, + is_template, beacon, + chanctx_conf, ema->cnt); + if (!ema->bcn[ema->cnt].skb) + break; + } + + if (ema->cnt == beacon->mbssid_ies->cnt) + return ema; + + ieee80211_beacon_free_ema_list(ema); + return NULL; +} + +#define IEEE80211_INCLUDE_ALL_MBSSID_ELEMS -1 + static struct sk_buff * __ieee80211_beacon_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_mutable_offsets *offs, bool is_template, - unsigned int link_id) + unsigned int link_id, + int ema_index, + struct ieee80211_ema_beacons **ema_beacons) { struct ieee80211_local *local = hw_to_local(hw); struct beacon_data *beacon = NULL; @@ -5198,8 +5247,29 @@ __ieee80211_beacon_get(struct ieee80211_hw *hw, if (!beacon) goto out; - skb = ieee80211_beacon_get_ap(hw, vif, link, offs, is_template, - beacon, chanctx_conf); + if (ema_beacons) { + *ema_beacons = + ieee80211_beacon_get_ap_ema_list(hw, vif, link, + offs, + is_template, + beacon, + chanctx_conf); + } else { + if (beacon->mbssid_ies && beacon->mbssid_ies->cnt) { + if (ema_index >= beacon->mbssid_ies->cnt) + goto out; /* End of MBSSID elements */ + + if (ema_index <= IEEE80211_INCLUDE_ALL_MBSSID_ELEMS) + ema_index = beacon->mbssid_ies->cnt; + } else { + ema_index = 0; + } + + skb = ieee80211_beacon_get_ap(hw, vif, link, offs, + is_template, beacon, + chanctx_conf, + ema_index); + } } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; struct ieee80211_hdr *hdr; @@ -5287,10 +5357,50 @@ ieee80211_beacon_get_template(struct ieee80211_hw *hw, struct ieee80211_mutable_offsets *offs, unsigned int link_id) { - return __ieee80211_beacon_get(hw, vif, offs, true, link_id); + return __ieee80211_beacon_get(hw, vif, offs, true, link_id, + IEEE80211_INCLUDE_ALL_MBSSID_ELEMS, NULL); } EXPORT_SYMBOL(ieee80211_beacon_get_template); +struct sk_buff * +ieee80211_beacon_get_template_ema_index(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_mutable_offsets *offs, + unsigned int link_id, u8 ema_index) +{ + return __ieee80211_beacon_get(hw, vif, offs, true, link_id, ema_index, + NULL); +} +EXPORT_SYMBOL(ieee80211_beacon_get_template_ema_index); + +void ieee80211_beacon_free_ema_list(struct ieee80211_ema_beacons *ema_beacons) +{ + u8 i; + + if (!ema_beacons) + return; + + for (i = 0; i < ema_beacons->cnt; i++) + kfree_skb(ema_beacons->bcn[i].skb); + + kfree(ema_beacons); +} +EXPORT_SYMBOL(ieee80211_beacon_free_ema_list); + +struct ieee80211_ema_beacons * +ieee80211_beacon_get_template_ema_list(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + unsigned int link_id) +{ + struct ieee80211_ema_beacons *ema_beacons = NULL; + + WARN_ON(__ieee80211_beacon_get(hw, vif, NULL, false, link_id, 0, + &ema_beacons)); + + return ema_beacons; +} +EXPORT_SYMBOL(ieee80211_beacon_get_template_ema_list); + struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 *tim_offset, u16 *tim_length, @@ -5298,7 +5408,9 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, { struct ieee80211_mutable_offsets offs = {}; struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false, - link_id); + link_id, + IEEE80211_INCLUDE_ALL_MBSSID_ELEMS, + NULL); struct sk_buff *copy; int shift;