cfg80211: Indicate MLO connection info in connect and roam callbacks

The MLO links used for connection with an MLD AP are decided by the
driver in case of SME offloaded to driver.

Add support for the drivers to indicate the information of links used
for MLO connection in connect and roam callbacks, update the connected
links information in wdev from connect/roam result sent by driver.
Also, send the connected links information to userspace.

Add a netlink flag attribute to indicate that userspace supports
handling of MLO connection. Drivers must not do MLO connection when this
flag is not set. This is to maintain backwards compatibility with older
supplicant versions which doesn't have support for MLO connection.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

6 files changed, 12 insertions, 11 deletions

diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 33ed54738d47..e11c7e9accc0 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -807,7 +807,7 @@ void ath6kl_cfg80211_connect_event(struct ath6kl_vif *vif, u16 channel,
 		cfg80211_put_bss(ar->wiphy, bss);
 	} else if (vif->sme_state == SME_CONNECTED) {
 		struct cfg80211_roam_info roam_info = {
-			.bss = bss,
+			.links[0].bss = bss,
 			.req_ie = assoc_req_ie,
 			.req_ie_len = assoc_req_len,
 			.resp_ie = assoc_resp_ie,
diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c
index 98b4c189eecc..ea7bd403e706 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.c
+++ b/drivers/net/wireless/ath/wil6210/wmi.c
@@ -1822,8 +1822,8 @@ wmi_evt_reassoc_status(struct wil6210_vif *vif, int id, void *d, int len)
 	freq = ieee80211_channel_to_frequency(ch, NL80211_BAND_60GHZ);
 
 	memset(&info, 0, sizeof(info));
-	info.channel = ieee80211_get_channel(wiphy, freq);
-	info.bss = vif->bss;
+	info.links[0].channel = ieee80211_get_channel(wiphy, freq);
+	info.links[0].bss = vif->bss;
 	info.req_ie = assoc_req_ie;
 	info.req_ie_len = assoc_req_ie_len;
 	info.resp_ie = assoc_resp_ie;
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 11e1f07f83e0..3ae6779fe153 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -6017,8 +6017,8 @@ brcmf_bss_roaming_done(struct brcmf_cfg80211_info *cfg,
 done:
 	kfree(buf);
 
-	roam_info.channel = notify_channel;
-	roam_info.bssid = profile->bssid;
+	roam_info.links[0].channel = notify_channel;
+	roam_info.links[0].bssid = profile->bssid;
 	roam_info.req_ie = conn_info->req_ie;
 	roam_info.req_ie_len = conn_info->req_ie_len;
 	roam_info.resp_ie = conn_info->resp_ie;
@@ -6061,7 +6061,7 @@ brcmf_bss_connect_done(struct brcmf_cfg80211_info *cfg,
 		} else {
 			conn_params.status = WLAN_STATUS_AUTH_TIMEOUT;
 		}
-		conn_params.bssid = profile->bssid;
+		conn_params.links[0].bssid = profile->bssid;
 		conn_params.req_ie = conn_info->req_ie;
 		conn_params.req_ie_len = conn_info->req_ie_len;
 		conn_params.resp_ie = conn_info->resp_ie;
diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c
index ff2448394a1e..05524291d60c 100644
--- a/drivers/net/wireless/rndis_wlan.c
+++ b/drivers/net/wireless/rndis_wlan.c
@@ -2813,8 +2813,9 @@ static void rndis_wlan_do_link_up_work(struct usbnet *usbdev)
 						resp_ie_len, 0, GFP_KERNEL);
 		} else {
 			struct cfg80211_roam_info roam_info = {
-				.channel = get_current_channel(usbdev, NULL),
-				.bssid = bssid,
+				.links[0].channel =
+					get_current_channel(usbdev, NULL),
+				.links[0].bssid = bssid,
 				.req_ie = req_ie,
 				.req_ie_len = req_ie_len,
 				.resp_ie = resp_ie,
diff --git a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
index 349aa3c4b668..cf35125b7891 100644
--- a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
+++ b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
@@ -450,8 +450,8 @@ check_bss:
 
 		notify_channel = ieee80211_get_channel(wiphy, freq);
 
-		roam_info.channel = notify_channel;
-		roam_info.bssid = cur_network->network.mac_address;
+		roam_info.links[0].channel = notify_channel;
+		roam_info.links[0].bssid = cur_network->network.mac_address;
 		roam_info.req_ie =
 			pmlmepriv->assoc_req+sizeof(struct ieee80211_hdr_3addr)+2;
 		roam_info.req_ie_len =
diff --git a/drivers/staging/wlan-ng/cfg80211.c b/drivers/staging/wlan-ng/cfg80211.c
index 87379edce9a8..b7b56d8406d1 100644
--- a/drivers/staging/wlan-ng/cfg80211.c
+++ b/drivers/staging/wlan-ng/cfg80211.c
@@ -645,7 +645,7 @@ void prism2_disconnected(struct wlandevice *wlandev)
 void prism2_roamed(struct wlandevice *wlandev)
 {
 	struct cfg80211_roam_info roam_info = {
-		.bssid = wlandev->bssid,
+		.links[0].bssid = wlandev->bssid,
 	};
 
 	cfg80211_roamed(wlandev->netdev, &roam_info, GFP_KERNEL);