From patchwork Mon Aug 26 12:33:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kavita Kavita X-Patchwork-Id: 823104 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 437CE22071 for ; Mon, 26 Aug 2024 12:34:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724675647; cv=none; b=b9qcZKlejLHHD1aXpp/fAi3SstikH7ynHd8kDVx3WjwkOYIWBspse7igMYf7gtiCF9HYoFZravNg803OiHsHH+v7DQFV17EDXTpWrn6qIOj5dn6MTSPX7HCKrZ4nN6NboNRZ8f4ULjSuA9XijMhHAQMI/Q/kVwVem4I52xDhal0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724675647; c=relaxed/simple; bh=4Lwc3lG+X4xvl3cTfXa+oMpvcTq4pXdbwSsfQ3wP4M4=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=floBmvjBjG2OiqJOAVRBjD98VHijCa5S9iBlGIE5YUFZRuh+o3ZJpG9Sl6JY5RoQQeCauBu5cfX45oQ3dR0R7YLvMNCwG3QK4fLTDVhC9EEkrEPR5tpeQCJw2K200u+LAvLlAMPO+B72KO+wWq7mqgmG33TBi9Qc4LfAuplDujA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=cLtOzDTz; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="cLtOzDTz" Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 47Q8MQr9017727; Mon, 26 Aug 2024 12:34:00 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-type:date:from:message-id:mime-version:subject:to; s= qcppdkim1; bh=19MWozbl5vOTznMmoRDQi1C3MVR/hSeoN+H8LoEYGDE=; b=cL tOzDTzkywCt+ECl1hZxa+fqXTkKjhdfFssMX4f5OZ/A5U5fc7gwuMlLCJE6ZMmSR kKlgnIRdsErCPOFVd5dUHMAhdDFp3/Bi+D3k46ZxcveyvN07JhOzKU7x2HnZnk4q S3VIL0zi9p6hwhFyNAkHp7zgfYtSBvJ1otXmWArbHiJQUTnAWM+6oATP638O+jlG TjBOyB3SKJ9K01sT4euM5HuXD3cbKuCFVbsqVDN0zmyThtw7IO3riinJxN6kGWA5 F8+wa7NumQWE6zYs9+zXsv8UHuRnsna6JBhQJVMZMkwbr44AYmKo3VwAIs4p4KGK GLJYYf+ua7rkWnH3+NMQ== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4179a1uk10-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 26 Aug 2024 12:34:00 +0000 (GMT) Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA03.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 47QCXxuS030504 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 26 Aug 2024 12:33:59 GMT Received: from hu-kkavita-hyd.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Mon, 26 Aug 2024 05:33:57 -0700 From: Kavita Kavita To: CC: , , Subject: [PATCH] wifi: cfg80211: skip regulatory checks when the channel is punctured Date: Mon, 26 Aug 2024 18:03:41 +0530 Message-ID: <20240826123341.5405-1-quic_kkavita@quicinc.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: hDdXMq_4decykHPSxFPO5NLbvcdUOi3m X-Proofpoint-ORIG-GUID: hDdXMq_4decykHPSxFPO5NLbvcdUOi3m X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-26_08,2024-08-26_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 bulkscore=0 phishscore=0 adultscore=0 mlxscore=0 lowpriorityscore=0 mlxlogscore=963 spamscore=0 impostorscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2408260098 The kernel performs several regulatory checks for AP mode in nl80211/cfg80211. These checks include radar detection, verification of whether the sub-channel is disabled, and an examination to determine if the channel is a DFS channel (both DFS usable and DFS available). These checks are performed across a frequency range, examining each sub-channel. However, these checks are also performed on frequencies that have been punctured, which should not be examined as they are not in use. This leads to the issue where the AP stops because one of the 20 MHz sub-channels is disabled or radar detected on the channel, even when the sub-channel is punctured. To address this issue, add a condition check wherever regulatory checks exist for AP mode in nl80211/cfg80211. This check identifies punctured channels and, upon finding them, skips the regulatory checks for those channels. Co-developed-by: Manaswini Paluri Signed-off-by: Manaswini Paluri Signed-off-by: Kavita Kavita --- net/wireless/chan.c | 59 ++++++++++++++++++++++++++++++++------------- 1 file changed, 42 insertions(+), 17 deletions(-) diff --git a/net/wireless/chan.c b/net/wireless/chan.c index e579d7e1425f..b363649acd03 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -727,6 +727,7 @@ static bool cfg80211_dfs_permissive_chan(struct wiphy *wiphy, static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, u32 center_freq, u32 bandwidth, + u16 punctured, enum nl80211_iftype iftype) { struct ieee80211_channel *c; @@ -740,9 +741,11 @@ static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, if (!c) return -EINVAL; - if (c->flags & IEEE80211_CHAN_RADAR && + if (!(punctured & 1) && (c->flags & IEEE80211_CHAN_RADAR) && !cfg80211_dfs_permissive_chan(wiphy, iftype, c)) return 1; + + punctured >>= 1; } return 0; @@ -770,7 +773,7 @@ int cfg80211_chandef_dfs_required(struct wiphy *wiphy, ret = cfg80211_get_chans_dfs_required(wiphy, ieee80211_chandef_to_khz(chandef), - width, iftype); + width, chandef->punctured, iftype); if (ret < 0) return ret; else if (ret > 0) @@ -781,7 +784,7 @@ int cfg80211_chandef_dfs_required(struct wiphy *wiphy, ret = cfg80211_get_chans_dfs_required(wiphy, MHZ_TO_KHZ(chandef->center_freq2), - width, iftype); + width, chandef->punctured, iftype); if (ret < 0) return ret; else if (ret > 0) @@ -808,7 +811,7 @@ EXPORT_SYMBOL(cfg80211_chandef_dfs_required); static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, u32 center_freq, - u32 bandwidth) + u32 bandwidth, u16 punctured) { struct ieee80211_channel *c; u32 freq, start_freq, end_freq; @@ -828,6 +831,12 @@ static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, if (!c) return -EINVAL; + if (punctured & 1) { + punctured >>= 1; + continue; + } + punctured >>= 1; + if (c->flags & IEEE80211_CHAN_DISABLED) return -EINVAL; @@ -858,7 +867,7 @@ bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, r1 = cfg80211_get_chans_dfs_usable(wiphy, MHZ_TO_KHZ(chandef->center_freq1), - width); + width, chandef->punctured); if (r1 < 0) return false; @@ -868,7 +877,7 @@ bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, WARN_ON(!chandef->center_freq2); r2 = cfg80211_get_chans_dfs_usable(wiphy, MHZ_TO_KHZ(chandef->center_freq2), - width); + width, chandef->punctured); if (r2 < 0) return false; break; @@ -1053,7 +1062,7 @@ bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, u32 center_freq, - u32 bandwidth) + u32 bandwidth, u16 punctured) { struct ieee80211_channel *c; u32 freq, start_freq, end_freq; @@ -1075,6 +1084,12 @@ static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, if (!c) return false; + if (punctured & 1) { + punctured >>= 1; + continue; + } + punctured >>= 1; + if (c->flags & IEEE80211_CHAN_DISABLED) return false; @@ -1102,7 +1117,7 @@ static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, r = cfg80211_get_chans_dfs_available(wiphy, MHZ_TO_KHZ(chandef->center_freq1), - width); + width, chandef->punctured); /* If any of channels unavailable for cf1 just return */ if (!r) @@ -1113,7 +1128,7 @@ static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, WARN_ON(!chandef->center_freq2); r = cfg80211_get_chans_dfs_available(wiphy, MHZ_TO_KHZ(chandef->center_freq2), - width); + width, chandef->punctured); break; default: WARN_ON(chandef->center_freq2); @@ -1125,7 +1140,8 @@ static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, u32 center_freq, - u32 bandwidth) + u32 bandwidth, + u16 punctured) { struct ieee80211_channel *c; u32 start_freq, end_freq, freq; @@ -1139,6 +1155,12 @@ static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, if (!c) return 0; + if (punctured & 1) { + punctured >>= 1; + continue; + } + punctured >>= 1; + if (c->flags & IEEE80211_CHAN_DISABLED) return 0; @@ -1168,14 +1190,14 @@ cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, t1 = cfg80211_get_chans_dfs_cac_time(wiphy, MHZ_TO_KHZ(chandef->center_freq1), - width); + width, chandef->punctured); if (!chandef->center_freq2) return t1; t2 = cfg80211_get_chans_dfs_cac_time(wiphy, MHZ_TO_KHZ(chandef->center_freq2), - width); + width, chandef->punctured); return max(t1, t2); } @@ -1183,6 +1205,7 @@ EXPORT_SYMBOL(cfg80211_chandef_dfs_cac_time); static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, u32 center_freq, u32 bandwidth, + u16 punctured, u32 prohibited_flags, u32 permitting_flags) { @@ -1198,8 +1221,10 @@ static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, return false; if (c->flags & permitting_flags) continue; - if (c->flags & prohibited_flags) + if ((c->flags & prohibited_flags) && !(punctured & 1)) return false; + + punctured >>= 1; } return true; @@ -1423,16 +1448,16 @@ bool _cfg80211_chandef_usable(struct wiphy *wiphy, if (!cfg80211_secondary_chans_ok(wiphy, ieee80211_chandef_to_khz(chandef), - width, prohibited_flags, - permitting_flags)) + width, chandef->punctured, + prohibited_flags, permitting_flags)) return false; if (!chandef->center_freq2) return true; return cfg80211_secondary_chans_ok(wiphy, MHZ_TO_KHZ(chandef->center_freq2), - width, prohibited_flags, - permitting_flags); + width, chandef->punctured, + prohibited_flags, permitting_flags); } bool cfg80211_chandef_usable(struct wiphy *wiphy,