From patchwork Wed Feb 28 08:40:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Berg X-Patchwork-Id: 776850 Received: from sipsolutions.net (s3.sipsolutions.net [168.119.38.16]) (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 4CFCD2D05C for ; Wed, 28 Feb 2024 08:42:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=168.119.38.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709109737; cv=none; b=UCntBLcZxPjy2ctCdStn/mbQ3EWe1HJia/pz2TygMsOFbHX8CbooSy56ogsWXElfEIDYEU6C1PfmUlBHXFIDuEmtu3fKatzp71ncBiIwH09QmYJDcHj7KOhKk+Cc1jcUFGF4HZqv4ExkUGJrAnab08viGw6CUBsXkV9zAAacbxU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709109737; c=relaxed/simple; bh=2G7v+oZXnVJFV2uy5ZCe55Ed6V8KZVT5zGP5ebwBHWs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hWRLZg8oUiXcxZ/Oc2yz1aAw+6d/axeDftJk16NlX/sP7uaPAjtgg8ocuiQy072zZXP7a0UgQJ/AGTleHmZqlkcH7MKf9jxJydb7+TRZXp3ErldOzXGJ85YeBl044JmoHwuziyQGFvbpVFMiwXvl9pgmiCanwN0kI3E+b08XsEQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sipsolutions.net; spf=pass smtp.mailfrom=sipsolutions.net; dkim=pass (2048-bit key) header.d=sipsolutions.net header.i=@sipsolutions.net header.b=XFNnHfya; arc=none smtp.client-ip=168.119.38.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sipsolutions.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sipsolutions.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sipsolutions.net header.i=@sipsolutions.net header.b="XFNnHfya" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sipsolutions.net; s=mail; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Content-Type:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-To: Resent-Cc:Resent-Message-ID; bh=16Wy14CQl1zGS4nR/ZVid8dfGZJq3z75j/st9ORbILc=; t=1709109735; x=1710319335; b=XFNnHfyatRX5s1QnZPx+AJhmFuQ9thODd9OmWhfn1pX279f a2uNkT4+IULAc6jhztMhKe+jQmhm0hf+/THzUOB+ppxn9iNVcZN4Ri1rpOXcIqphpgHlxFZ3qwv8X gS2xP4Gv7XHU0UGYp6+WGChKr5DNudaOrcd71f3A1amhRlkLLUVwBmY99nVWQEeqOBRZ9lqvCWpP2 NmYMrJLztSCpHzfgmEF6zQCTfO3lfs3QFZBj6XaWXWPeib9TSNiCceNsH71079Iy0/jF8Y2oT/M+y QmgcW76Ua4wP8YcbQtGwh/OW4xh9USs3RygvYNK2IaLFwJcuW8H1GJdLYntxECSw==; Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.97) (envelope-from ) id 1rfFVz-0000000BzmR-3jqq; Wed, 28 Feb 2024 09:42:12 +0100 From: Johannes Berg To: linux-wireless@vger.kernel.org Cc: Johannes Berg , Miriam Rachel Korenblit Subject: [PATCH 2/2] wifi: mac80211: obtain AP HT/VHT data for assoc request Date: Wed, 28 Feb 2024 09:40:52 +0100 Message-ID: <20240228094207.7dc812c2060a.Ibd591f9c214b4e166cf7171db3cf63bda8e3c9fd@changeid> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240228084207.18142-4-johannes@sipsolutions.net> References: <20240228084207.18142-4-johannes@sipsolutions.net> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Johannes Berg In the association request, we make some parameters depend on the AP's HT/VHT information. This was broken by my code because it no longer filled that information, making it all zero. For HT that meant we wouldn't reduce our capabilities to 20 MHz if needed, and for VHT we lost beamforming capabilities. Fix this. It seems like it may even have been broken for all but the assoc link before. Fixes: 310c8387c638 ("wifi: mac80211: clean up connection process") Reviewed-by: Miriam Rachel Korenblit Signed-off-by: Johannes Berg --- net/mac80211/mlme.c | 73 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index fa0d679b78f4..d5678a817771 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -8049,6 +8049,67 @@ ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, } } +static int +ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, + struct ieee80211_mgd_assoc_data *assoc_data, + int link_id) +{ + struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; + enum nl80211_band band = cbss->channel->band; + struct ieee80211_supported_band *sband; + const struct element *elem; + int err; + + /* neither HT nor VHT elements used on 6 GHz */ + if (band == NL80211_BAND_6GHZ) + return 0; + + if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) + return 0; + + rcu_read_lock(); + elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); + if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { + mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", + cbss->bssid); + err = -EINVAL; + goto out_rcu; + } + assoc_data->link[link_id].ap_ht_param = + ((struct ieee80211_ht_operation *)(elem->data))->ht_param; + rcu_read_unlock(); + + if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) + return 0; + + /* some drivers want to support VHT on 2.4 GHz even */ + sband = sdata->local->hw.wiphy->bands[band]; + if (!sband->vht_cap.vht_supported) + return 0; + + rcu_read_lock(); + elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); + /* but even then accept it not being present on the AP */ + if (!elem && band == NL80211_BAND_2GHZ) { + err = 0; + goto out_rcu; + } + if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { + mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", + cbss->bssid); + err = -EINVAL; + goto out_rcu; + } + memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, + sizeof(struct ieee80211_vht_cap)); + rcu_read_unlock(); + + return 0; +out_rcu: + rcu_read_unlock(); + return err; +} + int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, struct cfg80211_assoc_request *req) { @@ -8193,6 +8254,14 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, req->links[i].error = err; goto err_free; } + + err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, + assoc_data, i); + if (err) { + err = -EINVAL; + req->links[i].error = err; + goto err_free; + } } assoc_data->wmm = true; @@ -8228,6 +8297,10 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, &assoc_data->link[0].conn); uapsd_supported = bss->uapsd_supported; + + err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); + if (err) + goto err_free; } assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU;