[PATCH 2/2] wifi: cfg80211: expose update timestamp to drivers

[Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>]

From: Benjamin Berg <benjamin.berg@xxxxxxxxx>

This information is exposed to userspace but not drivers. Make this
field public so that drivers are also able to access it. The information
is for example useful for link selection to determine whether the BSS
corresponding to an MLO link has been seen in a recent scan.

Signed-off-by: Benjamin Berg <benjamin.berg@xxxxxxxxx>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
---
 include/net/cfg80211.h | 3 +++
 net/wireless/core.h    | 1 -
 net/wireless/nl80211.c | 4 ++--
 net/wireless/scan.c    | 6 +++---
 4 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index a72e7eb7027f..3580f3f5f44e 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -2947,6 +2947,7 @@ struct cfg80211_bss_ies {
  * @nontrans_list: list of non-transmitted BSS, if this is a transmitted one
  *	(multi-BSSID support)
  * @signal: signal strength value (type depends on the wiphy's signal_type)
+ * @ts_boottime: timestamp of the last BSS update in nanoseconds since boot
  * @chains: bitmask for filled values in @chain_signal.
  * @chain_signal: per-chain signal strength of last received BSS in dBm.
  * @bssid_index: index in the multiple BSS set
@@ -2971,6 +2972,8 @@ struct cfg80211_bss {
 
 	s32 signal;
 
+	u64 ts_boottime;
+
 	u16 beacon_interval;
 	u16 capability;
 
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 826299f3d781..b094b526b05d 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -180,7 +180,6 @@ struct cfg80211_internal_bss {
 	struct list_head list;
 	struct list_head hidden_list;
 	struct rb_node rbn;
-	u64 ts_boottime;
 	unsigned long ts;
 	unsigned long refcount;
 	atomic_t hold;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 8bd09110d393..79b3f34e72e2 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -10519,9 +10519,9 @@ static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
 		     intbss->parent_bssid)))
 		goto nla_put_failure;
 
-	if (intbss->ts_boottime &&
+	if (res->ts_boottime &&
 	    nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
-			      intbss->ts_boottime, NL80211_BSS_PAD))
+			      res->ts_boottime, NL80211_BSS_PAD))
 		goto nla_put_failure;
 
 	if (!nl80211_put_signal(msg, intbss->pub.chains,
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index cd2124329521..65c04d4bfc24 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -5,7 +5,7 @@
  * Copyright 2008 Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
  * Copyright 2013-2014  Intel Mobile Communications GmbH
  * Copyright 2016	Intel Deutschland GmbH
- * Copyright (C) 2018-2024 Intel Corporation
+ * Copyright (C) 2018-2025 Intel Corporation
  */
 #include <linux/kernel.h>
 #include <linux/slab.h>
@@ -1934,7 +1934,7 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev,
 		known->pub.signal = new->pub.signal;
 	known->pub.capability = new->pub.capability;
 	known->ts = new->ts;
-	known->ts_boottime = new->ts_boottime;
+	known->pub.ts_boottime = new->pub.ts_boottime;
 	known->parent_tsf = new->parent_tsf;
 	known->pub.chains = new->pub.chains;
 	memcpy(known->pub.chain_signal, new->pub.chain_signal,
@@ -2291,7 +2291,7 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy,
 		tmp.pub.signal = 0;
 	tmp.pub.beacon_interval = data->beacon_interval;
 	tmp.pub.capability = data->capability;
-	tmp.ts_boottime = drv_data->boottime_ns;
+	tmp.pub.ts_boottime = drv_data->boottime_ns;
 	tmp.parent_tsf = drv_data->parent_tsf;
 	ether_addr_copy(tmp.parent_bssid, drv_data->parent_bssid);
 	tmp.pub.chains = drv_data->chains;
-- 
2.34.1