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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3339af25062sm47841297eec.16.2026.09.07.13.33.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Sep 2026 13:33:31 -0700 (PDT) From: Pooventhiran G Date: Tue, 08 Sep 2026 01:59:14 +0530 Subject: [PATCH wireless-next 05/18] wifi: cfg80211/mac80211: Parse SMD parameters in STA addition/modification 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" Content-Transfer-Encoding: 7bit Message-Id: <20260908-smd-v1-5-65ad4ab30fbd@oss.qualcomm.com> References: <20260908-smd-v1-0-65ad4ab30fbd@oss.qualcomm.com> In-Reply-To: <20260908-smd-v1-0-65ad4ab30fbd@oss.qualcomm.com> To: "David S. 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Otherwise, drivers will not be able to identify that the non-AP MLD has negotiated SMD with this AP MLD during association nor can they support SMD BSS Transition if it has been requested later by the non-AP MLD. Signed-off-by: Aditya Sathish Co-developed-by: Sidhanta Sahu Signed-off-by: Sidhanta Sahu Co-developed-by: Pooventhiran G Signed-off-by: Pooventhiran G --- include/net/cfg80211.h | 15 +++++++++++++ include/net/mac80211.h | 3 +++ include/uapi/linux/nl80211.h | 17 ++++++++++++++ net/mac80211/cfg.c | 10 +++++++++ net/mac80211/debugfs_sta.c | 1 + net/mac80211/sta_info.h | 2 ++ net/wireless/nl80211.c | 53 ++++++++++++++++++++++++++++++++++++++------ 7 files changed, 94 insertions(+), 7 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index d0a269f4c711..bf33cf5366ef 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1897,6 +1897,19 @@ struct cfg80211_ttlm_params { u16 ulink[8]; }; +/** + * struct cfg80211_sta_smd_params - SMD parameters for an added station + * + * @smd_sta: SMD-negotiated STA + * @smd_identifier: SMD Identifier + * @dl_data_fwd: MSDU forwarding supported + */ +struct cfg80211_sta_smd_params { + bool smd_sta; + u8 smd_identifier[ETH_ALEN]; + bool dl_data_fwd; +}; + /** * struct station_parameters - station parameters * @@ -1937,6 +1950,7 @@ struct cfg80211_ttlm_params { * @link_sta_params: link related params. * @epp_peer: EPP peer indication * @nmi_mac: MAC address of the NMI station of the NAN peer + * @smd_params: SMD params for this station */ struct station_parameters { struct net_device *vlan; @@ -1965,6 +1979,7 @@ struct station_parameters { struct link_station_parameters link_sta_params; bool epp_peer; const u8 *nmi_mac; + struct cfg80211_sta_smd_params smd_params; }; /** diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 6b82ca07fbf0..d8f5e5d8a021 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -2727,6 +2727,7 @@ struct ieee80211_link_sta { * @nan_sched: NAN peer schedule for this station. Valid only for NMI stations. * @ext_mld_capa_ops: the MLD's extended MLD capabilities and operations * NOTE: currently only tracked for AP STAs + * @smd_params: SMD parameters of the STA */ struct ieee80211_sta { u8 addr[ETH_ALEN] __aligned(2); @@ -2761,6 +2762,8 @@ struct ieee80211_sta { /* should only be accessed with the wiphy mutex held */ struct ieee80211_nan_peer_sched *nan_sched; + struct cfg80211_sta_smd_params smd_params; + /* must be last */ u8 drv_priv[] __aligned(sizeof(void *)); }; diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index f5c8dbe5f26a..f1d8db31f17e 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -3191,6 +3191,17 @@ enum nl80211_commands { * %NL80211_EXT_FEATURE_SMD. * Used with %NL80211_CMD_START_AP. See &enum nl80211_smd_params_attrs. * + * @NL80211_ATTR_PEER_SMD_ENABLED: Flag indicating a peer STA has SMD enabled. + * Used with %NL80211_CMD_NEW_STATION. + * + * @NL80211_ATTR_PEER_SMD_MAC_ADDR: Binary attribute with the 6-byte MAC + * address of the SMD-capable peer STA. + * Used with %NL80211_CMD_NEW_STATION. + * + * @NL80211_ATTR_PEER_SMD_DL_DATA_FORWARDING: Flag indicating the peer STA + * supports DL data forwarding within the SMD domain. + * Used with %NL80211_CMD_NEW_STATION. + * * @NUM_NL80211_ATTR: total number of nl80211_attrs available * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use @@ -3793,6 +3804,10 @@ enum nl80211_attrs { NL80211_ATTR_SMD_PARAMS, + NL80211_ATTR_PEER_SMD_ENABLED, + NL80211_ATTR_PEER_SMD_MAC_ADDR, + NL80211_ATTR_PEER_SMD_DL_DATA_FORWARDING, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -3942,6 +3957,7 @@ enum nl80211_iftype { * that support %NL80211_FEATURE_FULL_AP_CLIENT_STATE to transition a * previously added station into associated state * @NL80211_STA_FLAG_SPP_AMSDU: station supports SPP A-MSDUs + * @NL80211_STA_FLAG_SMD: station has negotiated SMD. * @NL80211_STA_FLAG_MAX: highest station flag number currently defined * @__NL80211_STA_FLAG_AFTER_LAST: internal use */ @@ -3955,6 +3971,7 @@ enum nl80211_sta_flags { NL80211_STA_FLAG_TDLS_PEER, NL80211_STA_FLAG_ASSOCIATED, NL80211_STA_FLAG_SPP_AMSDU, + NL80211_STA_FLAG_SMD, /* keep last */ __NL80211_STA_FLAG_AFTER_LAST, diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index b4b42790c5d7..138b67f4bda4 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2528,6 +2528,16 @@ static int sta_apply_parameters(struct ieee80211_local *local, if (mask & BIT(NL80211_STA_FLAG_SPP_AMSDU)) sta->sta.spp_amsdu = set & BIT(NL80211_STA_FLAG_SPP_AMSDU); + if (mask & BIT(NL80211_STA_FLAG_SMD)) { + if (set & BIT(NL80211_STA_FLAG_SMD)) + set_sta_flag(sta, WLAN_STA_SMD); + else if (test_sta_flag(sta, WLAN_STA_SMD)) + clear_sta_flag(sta, WLAN_STA_SMD); + } + + if (params->smd_params.smd_sta) + sta->sta.smd_params = params->smd_params; + /* mark TDLS channel switch support, if the AP allows it */ if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && !sdata->deflink.u.mgd.tdls_chan_switch_prohibited && diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c index ef75255d47d5..d7e7c9c578e4 100644 --- a/net/mac80211/debugfs_sta.c +++ b/net/mac80211/debugfs_sta.c @@ -78,6 +78,7 @@ static const char * const sta_flag_names[] = { FLAG(PS_DELIVER), FLAG(USES_ENCRYPTION), FLAG(DECAP_OFFLOAD), + FLAG(SMD), #undef FLAG }; diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index ee0d32877c5b..506aeb241a6d 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -72,6 +72,7 @@ * @WLAN_STA_USES_ENCRYPTION: This station was configured for encryption, * so drop all packets without a key later. * @WLAN_STA_DECAP_OFFLOAD: This station uses rx decap offload + * @WLAN_STA_SMD: this station is associated to an SMD-ME. * * @NUM_WLAN_STA_FLAGS: number of defined flags */ @@ -104,6 +105,7 @@ enum ieee80211_sta_info_flags { WLAN_STA_PS_DELIVER, WLAN_STA_USES_ENCRYPTION, WLAN_STA_DECAP_OFFLOAD, + WLAN_STA_SMD, NUM_WLAN_STA_FLAGS, }; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index aa7aa70a5b41..0d20c2ab3d5e 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -1114,6 +1114,9 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { [NL80211_ATTR_STA_DUMP_LINK_STATS] = { .type = NLA_FLAG }, [NL80211_ATTR_SMD_PARAMS] = NLA_POLICY_NESTED(nl80211_smd_params_policy), + [NL80211_ATTR_PEER_SMD_ENABLED] = { .type = NLA_FLAG }, + [NL80211_ATTR_PEER_SMD_MAC_ADDR] = NLA_POLICY_ETH_ADDR, + [NL80211_ATTR_PEER_SMD_DL_DATA_FORWARDING] = { .type = NLA_FLAG }, }; /* policy for the key attributes */ @@ -7702,6 +7705,7 @@ static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = { [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG }, [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG }, [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG }, + [NL80211_STA_FLAG_SMD] = { .type = NLA_FLAG }, }; static int parse_station_flags(struct genl_info *info, @@ -7768,11 +7772,13 @@ static int parse_station_flags(struct genl_info *info, switch (iftype) { case NL80211_IFTYPE_AP: case NL80211_IFTYPE_AP_VLAN: + params->sta_flags_mask = BIT(NL80211_STA_FLAG_SMD); + fallthrough; case NL80211_IFTYPE_P2P_GO: - params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | - BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | - BIT(NL80211_STA_FLAG_WME) | - BIT(NL80211_STA_FLAG_MFP); + params->sta_flags_mask |= BIT(NL80211_STA_FLAG_AUTHORIZED) | + BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | + BIT(NL80211_STA_FLAG_WME) | + BIT(NL80211_STA_FLAG_MFP); break; case NL80211_IFTYPE_P2P_CLIENT: case NL80211_IFTYPE_STATION: @@ -8913,7 +8919,7 @@ int cfg80211_check_station_change(struct wiphy *wiphy, return -EINVAL; /* When you run into this, adjust the code below for the new flag */ - BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 8); + BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 9); switch (statype) { case CFG80211_STA_MESH_PEER_KERNEL: @@ -9007,7 +9013,8 @@ int cfg80211_check_station_change(struct wiphy *wiphy, BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | BIT(NL80211_STA_FLAG_WME) | BIT(NL80211_STA_FLAG_MFP) | - BIT(NL80211_STA_FLAG_SPP_AMSDU))) + BIT(NL80211_STA_FLAG_SPP_AMSDU) | + BIT(NL80211_STA_FLAG_SMD))) return -EINVAL; /* but authenticated/associated only if driver handles it */ @@ -9261,6 +9268,30 @@ static int nl80211_parse_sta_txpower_setting(struct genl_info *info, return 0; } +static int nl80211_set_station_smd(struct genl_info *info, + struct station_parameters *params) +{ + struct nlattr *smd_mac; + + params->smd_params.smd_sta = + !!info->attrs[NL80211_ATTR_PEER_SMD_ENABLED]; + + if (!params->smd_params.smd_sta) + return 0; + + smd_mac = info->attrs[NL80211_ATTR_PEER_SMD_MAC_ADDR]; + + if (!info->attrs[NL80211_ATTR_MLD_ADDR] || !smd_mac) + return -EINVAL; + + nla_memcpy(params->smd_params.smd_identifier, smd_mac, ETH_ALEN); + + params->smd_params.dl_data_fwd = + !!info->attrs[NL80211_ATTR_PEER_SMD_DL_DATA_FORWARDING]; + + return 0; +} + static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev = info->user_ptr[0]; @@ -9399,6 +9430,10 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) if (err) return err; + err = nl80211_set_station_smd(info, ¶ms); + if (err) + return err; + /* Include parameters for TDLS peer (will check later) */ err = nl80211_set_station_tdls(info, ¶ms); if (err) @@ -9627,6 +9662,10 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) if (parse_station_flags(info, wdev->iftype, ¶ms)) return -EINVAL; + err = nl80211_set_station_smd(info, ¶ms); + if (err) + return err; + /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT * as userspace might just pass through the capabilities from the IEs * directly, rather than enforcing this restriction and returning an @@ -9660,7 +9699,7 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) return -EINVAL; /* When you run into this, adjust the code below for the new flag */ - BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 8); + BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 9); switch (wdev->iftype) { case NL80211_IFTYPE_AP: -- 2.34.1