From 7d366663b7d84ecdb52ba141c1cafd4f3c73e0ff Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 29 Jan 2024 20:00:02 +0100 Subject: wifi: mac80211_hwsim: add control to skip beacons To test certain beacon loss scenarios it can be useful to simply not send a couple of beacons. Add a simple debugfs file (per vif) to skip sending the beacons. They're still fully prepared etc. so their DTIM count etc. will appear as if they were simply corrupt over the air or otherwise not received. Reviewed-by: Jeff Johnson Link: https://msgid.link/20240129200001.a267383709e6.I36f427d17c3478a7df46e205716f5ebc9b35a918@changeid Signed-off-by: Johannes Berg --- drivers/net/wireless/virtual/mac80211_hwsim.c | 28 ++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) (limited to 'drivers/net/wireless/virtual/mac80211_hwsim.c') diff --git a/drivers/net/wireless/virtual/mac80211_hwsim.c b/drivers/net/wireless/virtual/mac80211_hwsim.c index 403d892c0468..3adc11bcaf12 100644 --- a/drivers/net/wireless/virtual/mac80211_hwsim.c +++ b/drivers/net/wireless/virtual/mac80211_hwsim.c @@ -213,6 +213,7 @@ static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = { struct hwsim_vif_priv { u32 magic; + u32 skip_beacons; u8 bssid[ETH_ALEN]; bool assoc; bool bcn_en; @@ -2128,6 +2129,16 @@ static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw, return 0; } +#ifdef CONFIG_MAC80211_DEBUGFS +static void mac80211_hwsim_vif_add_debugfs(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct hwsim_vif_priv *vp = (void *)vif->drv_priv; + + debugfs_create_u32("skip_beacons", 0600, vif->debugfs_dir, + &vp->skip_beacons); +} +#endif static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, @@ -2193,12 +2204,19 @@ static void __mac80211_hwsim_beacon_tx(struct ieee80211_bss_conf *link_conf, struct ieee80211_vif *vif, struct sk_buff *skb) { + struct hwsim_vif_priv *vp = (void *)vif->drv_priv; struct ieee80211_tx_info *info; struct ieee80211_rate *txrate; struct ieee80211_mgmt *mgmt; /* TODO: get MCS */ int bitrate = 100; + if (vp->skip_beacons) { + vp->skip_beacons--; + dev_kfree_skb(skb); + return; + } + info = IEEE80211_SKB_CB(skb); if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) ieee80211_get_tx_rates(vif, NULL, skb, @@ -3857,6 +3875,13 @@ out: return err; } +#ifdef CONFIG_MAC80211_DEBUGFS +#define HWSIM_DEBUGFS_OPS \ + .vif_add_debugfs = mac80211_hwsim_vif_add_debugfs, +#else +#define HWSIM_DEBUGFS_OPS +#endif + #define HWSIM_COMMON_OPS \ .tx = mac80211_hwsim_tx, \ .wake_tx_queue = ieee80211_handle_wake_tx_queue, \ @@ -3881,7 +3906,8 @@ out: .get_et_stats = mac80211_hwsim_get_et_stats, \ .get_et_strings = mac80211_hwsim_get_et_strings, \ .start_pmsr = mac80211_hwsim_start_pmsr, \ - .abort_pmsr = mac80211_hwsim_abort_pmsr, + .abort_pmsr = mac80211_hwsim_abort_pmsr, \ + HWSIM_DEBUGFS_OPS #define HWSIM_NON_MLO_OPS \ .sta_add = mac80211_hwsim_sta_add, \ -- cgit v1.2.3-58-ga151