diff mbox series

[09/11] wifi: mac80211: add support for the monitor SKIP_TX flag

Message ID 9b8964dd77a82e603e177ba0b714082972ae70ce.1727869380.git-series.nbd@nbd.name
State New
Headers show
Series wifi: cfg80211/mac80211: improve support for multiple radios | expand

Commit Message

Felix Fietkau Oct. 2, 2024, 11:45 a.m. UTC 
Do not pass locally sent packets to monitor interfaces with this flag set.
Skip processing tx packets on the status call entirely if no monitor
interfaces without this flag are present.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 net/mac80211/ieee80211_i.h | 2 +-
 net/mac80211/iface.c       | 2 ++
 net/mac80211/status.c      | 5 ++++-
 3 files changed, 7 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 4f0390918b60..d697e9dab70d 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1370,7 +1370,7 @@  struct ieee80211_local {
 	spinlock_t queue_stop_reason_lock;
 
 	int open_count;
-	int monitors, cooked_mntrs;
+	int monitors, cooked_mntrs, tx_mntrs;
 	/* number of interfaces with corresponding FIF_ flags */
 	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
 	    fif_probe_req;
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 3aefc62034ba..54060ba97b98 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1094,6 +1094,8 @@  void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
 	ADJUST(CONTROL, control);
 	ADJUST(CONTROL, pspoll);
 	ADJUST(OTHER_BSS, other_bss);
+	if (!(flags & MONITOR_FLAG_SKIP_TX))
+		local->tx_mntrs += offset;
 
 #undef ADJUST
 }
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index d1cf987de13b..eb889cda8bf9 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -927,6 +927,9 @@  void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
 			if (!ieee80211_sdata_running(sdata))
 				continue;
 
+			if (sdata->u.mntr.flags & MONITOR_FLAG_SKIP_TX)
+				continue;
+
 			if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
 			    !send_to_cooked)
 				continue;
@@ -1099,7 +1102,7 @@  static void __ieee80211_tx_status(struct ieee80211_hw *hw,
 	 * This is a bit racy but we can avoid a lot of work
 	 * with this test...
 	 */
-	if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
+	if (!local->tx_mntrs && (!send_to_cooked || !local->cooked_mntrs)) {
 		if (status->free_list)
 			list_add_tail(&skb->list, status->free_list);
 		else