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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-33450e140d3sm31773675eec.4.2026.09.08.10.10.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Sep 2026 10:10:15 -0700 (PDT) From: Pooventhiran G To: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Johannes Berg Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, Pooventhiran G Subject: [PATCH RESEND wireless-next 04/18] wifi: cfg80211/mac80211: Configure AP with SMD capabilities Date: Tue, 8 Sep 2026 22:39:32 +0530 Message-Id: <20260908-smd-v1-4-9fd2d876a1fb@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260908-smd-v1-0-9fd2d876a1fb@oss.qualcomm.com> References: <20260908-smd-v1-0-9fd2d876a1fb@oss.qualcomm.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.14.3 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA4MDE4NSBTYWx0ZWRfXzGbIQqIOJO/Y qSswWLt4pSLlSZfX7+jodc53U5VdkleZzLkDSnx2H7GjC/BZMpyX4nGdA9oYkYtaMJUpdFlQagb pCrlR+Dc3r1Tv93n/7p1TRShmk8yDMk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA4MDE4NSBTYWx0ZWRfX0Wswq2i2bk+U CXqH9Ykd1hVUhuPK6z0TEkhr0rdg0QBI3Zy4szEhmRX4MFoqdn7gWLLKlUG4bfrTmLfo4Z77Gib D2LwWHj47aUsIAFjAFPimxfHE+tsJ51/bMWOoFdYLE0tVh793zcecVNREM2wJb9W0sKi0ZEptGA g2QeMZcswG6naD6D/YfB74XDxR9GN2lHYTZ1cztWIXRwfICdzRjC8nFgSSmHkJr97pxHxE2nZxl PRRjRGslDPvUDMUSeVjUyJcFTE1ujDFxGIwlZ9lrlXzMTy0DyW86yjY3P3oTy+Dr60pmCZ2q2at scVnxx3o6THxGjM1yDnxydxr0XmGHSONsZ6dG24HH3kWlQraMs6lmB9X4evkntnchxnMNfSwRLz rc4xhEF99Pxjf3UyVdtgLyuN0id5o6/J0PtmaZeSwBNB57Z02sYLDrb7L1mgun64ZA7AlIUy+EA J9/++xrZsUp07Kh2Dbg== X-Proofpoint-ORIG-GUID: XmtLqDkZoJdAFP4g5v-vHR4C9TWWJVMr X-Authority-Analysis: v=2.4 cv=QrduG1yd c=1 sm=1 tr=0 ts=6aa04179 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=EUspDBNiAAAA:8 a=56q9xwJp3_aMvtWITrUA:9 a=QEXdDO2ut3YA:10 a=3WC7DwWrALyhR5TkjVHa:22 X-Proofpoint-GUID: XmtLqDkZoJdAFP4g5v-vHR4C9TWWJVMr X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-08_03,2026-09-08_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 bulkscore=0 adultscore=0 malwarescore=0 lowpriorityscore=0 impostorscore=0 spamscore=0 priorityscore=1501 phishscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609080185 From: Rohan Dutta When an AP is getting started, configure the AP as SMD-enabled if userspace defines configuration for the Seamless Mobility Domain (SMD). The SMD parameters are: - SMD Identifier: unique identifier of the SMD - SMD Preparation Timeout: Valid duration for a prepared target AP MLD - Downlink Data Forwarding: Forwarding support for buffered DL packets - Max number of Peer AP MLDs: Number of target AP MLDs a non-AP MLD can prepare with - SMD Type: Type of SMD - SMD PTK Mode: PTK mode used in the SMD - Neighbor Probing: UHR Neighboring AP Probing Without these parameters configured, drivers and lower layers cannot be able to support SMD BSS Transition. Signed-off-by: Rohan Dutta Co-developed-by: Aditya Sathish Signed-off-by: Aditya Sathish Co-developed-by: Sidhanta Sahu Signed-off-by: Sidhanta Sahu Signed-off-by: Pooventhiran G --- include/net/cfg80211.h | 25 ++++++++++++++++ include/net/mac80211.h | 2 ++ net/mac80211/cfg.c | 5 ++++ net/wireless/nl80211.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 110 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 6461a7bd0169..d0a269f4c711 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1587,6 +1587,29 @@ struct cfg80211_s1g_short_beacon { size_t short_tail_len; }; +/** + * struct cfg80211_smd_params - Seamless Mobility Domain parameters + * + * @smd_enabled: SMD is enabled on this device + * @smd_identifier: SMD ID (ETH_ALEN bytes) + * @smd_timeout: timeout in 64 TUs for ST preparation + * @dl_data_fwd: MSDU forwarding supported + * @max_num_of_peer_apmlds: max prepared AP MLDs supported (0-7) + * @smd_type: SMD type + * @ptk_mode: PTK mode + * @neighbor_probing: UHR Neighboring AP Probing supported + */ +struct cfg80211_smd_params { + bool smd_enabled; + u8 smd_identifier[ETH_ALEN]; + u16 smd_timeout; + bool dl_data_fwd; + u8 max_num_of_peer_apmlds; + enum nl80211_smd_type smd_type; + enum nl80211_smd_ptk_mode ptk_mode; + bool neighbor_probing; +}; + /** * struct cfg80211_ap_settings - AP configuration * @@ -1623,6 +1646,7 @@ struct cfg80211_s1g_short_beacon { * @mbssid_config: AP settings for multiple bssid * @s1g_long_beacon_period: S1G long beacon period * @s1g_short_beacon: S1G short beacon data + * @smd_params: Seamless Mobility Domain (SMD) parameters */ struct cfg80211_ap_settings { struct cfg80211_chan_def chandef; @@ -1655,6 +1679,7 @@ struct cfg80211_ap_settings { struct cfg80211_mbssid_config mbssid_config; u8 s1g_long_beacon_period; struct cfg80211_s1g_short_beacon s1g_short_beacon; + struct cfg80211_smd_params smd_params; }; diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 7bb4618065b6..6b82ca07fbf0 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -797,6 +797,7 @@ struct ieee80211_bss_npca_params { * @s1g_long_beacon_period: number of beacon intervals between each long * beacon transmission. * @npca: NPCA parameters + * @smd_params: SMD parameters */ struct ieee80211_bss_conf { struct ieee80211_vif *vif; @@ -904,6 +905,7 @@ struct ieee80211_bss_conf { u8 s1g_long_beacon_period; struct ieee80211_bss_npca_params npca; + struct cfg80211_smd_params smd_params; }; #define IEEE80211_NAN_MAX_CHANNELS 3 diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 23f4f9ec86d0..b4b42790c5d7 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1796,6 +1796,11 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev, } } + if (params->smd_params.smd_enabled) + link_conf->smd_params = params->smd_params; + else + link_conf->smd_params.smd_enabled = false; + if (sdata->vif.type == NL80211_IFTYPE_AP && params->mbssid_config.tx_wdev) { err = ieee80211_set_ap_mbssid_options(sdata, diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 22d71f32815f..aa7aa70a5b41 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -7224,6 +7224,78 @@ static int nl80211_check_npca(struct cfg80211_registered_device *rdev, return -EINVAL; } +static int nl80211_parse_smd_params(struct genl_info *info, + struct cfg80211_smd_params *smd_params) +{ + struct nlattr *smd_params_attr = info->attrs[NL80211_ATTR_SMD_PARAMS]; + struct cfg80211_registered_device *rdev = info->user_ptr[0]; + struct net_device *dev = info->user_ptr[1]; + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct nlattr *tb[NL80211_SMD_PARAMS_ATTR_MAX + 1]; + int err; + + if (!wiphy_ext_feature_isset(&rdev->wiphy, + NL80211_EXT_FEATURE_SMD)) { + GENL_SET_ERR_MSG(info, "SMD is not supported"); + return -EOPNOTSUPP; + } + + if (!wdev->valid_links) { + GENL_SET_ERR_MSG(info, "SMD is not allowed without MLO"); + return -EINVAL; + } + + err = nla_parse_nested(tb, NL80211_SMD_PARAMS_ATTR_MAX, + smd_params_attr, nl80211_smd_params_policy, + NULL); + if (err) { + GENL_SET_ERR_MSG(info, "failed to parse SMD parameters"); + return err; + } + + if (!tb[NL80211_SMD_PARAMS_ATTR_IDENTIFIER] || + !tb[NL80211_SMD_PARAMS_ATTR_TIMEOUT] || + !tb[NL80211_SMD_PARAMS_ATTR_MAX_PEER_APMLDS] || + !tb[NL80211_SMD_PARAMS_ATTR_TYPE] || + !tb[NL80211_SMD_PARAMS_ATTR_PTK_MODE]) { + GENL_SET_ERR_MSG(info, "required SMD parameters are missing"); + return -EINVAL; + } + + memcpy(smd_params->smd_identifier, + nla_data(tb[NL80211_SMD_PARAMS_ATTR_IDENTIFIER]), + ETH_ALEN); + + smd_params->smd_timeout = + nla_get_u16(tb[NL80211_SMD_PARAMS_ATTR_TIMEOUT]); + + smd_params->dl_data_fwd = + !!tb[NL80211_SMD_PARAMS_ATTR_DL_DATA_FORWARDING]; + if (smd_params->dl_data_fwd && + !wiphy_ext_feature_isset(&rdev->wiphy, + NL80211_EXT_FEATURE_SMD_DL_PKT_FORWARDING)) { + GENL_SET_ERR_MSG(info, + "SMD DL packet forwarding is not supported"); + return -EOPNOTSUPP; + } + + smd_params->max_num_of_peer_apmlds = + nla_get_u8(tb[NL80211_SMD_PARAMS_ATTR_MAX_PEER_APMLDS]); + + smd_params->smd_type = + nla_get_u8(tb[NL80211_SMD_PARAMS_ATTR_TYPE]); + + smd_params->ptk_mode = + nla_get_u8(tb[NL80211_SMD_PARAMS_ATTR_PTK_MODE]); + + smd_params->neighbor_probing = + !!tb[NL80211_SMD_PARAMS_ATTR_NEIGHBOR_PROBING]; + + smd_params->smd_enabled = true; + + return 0; +} + static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev = info->user_ptr[0]; @@ -7505,6 +7577,12 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) /* FIXME: validate MLO/link-id against driver capabilities */ + if (info->attrs[NL80211_ATTR_SMD_PARAMS]) { + err = nl80211_parse_smd_params(info, ¶ms->smd_params); + if (err) + goto out; + } + err = rdev_start_ap(rdev, dev, params); if (!err) { wdev->links[link_id].ap.beacon_interval = params->beacon_interval; -- 2.34.1