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Message-Id: <20250505221419.2672473-640-sashal@kernel.org>
Date: Mon, 5 May 2025 18:14:16 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Alexander Wetzel <Alexander@...zel-home.de>,
Karthikeyan Periyasamy <quic_periyasa@...cinc.com>,
Johannes Berg <johannes.berg@...el.com>,
Sasha Levin <sashal@...nel.org>,
johannes@...solutions.net,
linux-wireless@...r.kernel.org
Subject: [PATCH AUTOSEL 6.14 640/642] wifi: mac80211: Add counter for all monitor interfaces
From: Alexander Wetzel <Alexander@...zel-home.de>
[ Upstream commit 129860044c611008be37f49d04cf41874e3659e6 ]
Count open monitor interfaces regardless of the monitor interface type.
The new counter virt_monitors takes over counting interfaces depending
on the virtual monitor interface while monitors is used for all active
monitor interfaces.
This fixes monitor packet mirroring when using MONITOR_FLAG_ACTIVE or
NO_VIRTUAL_MONITOR interfaces.
Fixes: 286e69677065 ("wifi: mac80211: Drop cooked monitor support")
Reported-by: Karthikeyan Periyasamy <quic_periyasa@...cinc.com>
Closes: https://lore.kernel.org/r/cc715114-4e3b-619a-49dc-a4878075e1dc@quicinc.com
Signed-off-by: Alexander Wetzel <Alexander@...zel-home.de>
Tested-by: Karthikeyan Periyasamy <quic_periyasa@...cinc.com>
Link: https://patch.msgid.link/20250220094139.61459-1-Alexander@wetzel-home.de
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
net/mac80211/cfg.c | 5 ++---
net/mac80211/ethtool.c | 2 +-
net/mac80211/ieee80211_i.h | 2 +-
net/mac80211/iface.c | 22 +++++++++++++---------
net/mac80211/util.c | 3 ++-
5 files changed, 19 insertions(+), 15 deletions(-)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 1ec246133d244..a7aeb37254bbf 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -4370,9 +4370,8 @@ static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
if (chanctx_conf) {
*chandef = link->conf->chanreq.oper;
ret = 0;
- } else if (!ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR) &&
- local->open_count > 0 &&
- local->open_count == local->monitors &&
+ } else if (local->open_count > 0 &&
+ local->open_count == local->virt_monitors &&
sdata->vif.type == NL80211_IFTYPE_MONITOR) {
*chandef = local->monitor_chanreq.oper;
ret = 0;
diff --git a/net/mac80211/ethtool.c b/net/mac80211/ethtool.c
index 42f7ee142ce3f..0397755a3bd1c 100644
--- a/net/mac80211/ethtool.c
+++ b/net/mac80211/ethtool.c
@@ -158,7 +158,7 @@ static void ieee80211_get_stats(struct net_device *dev,
if (chanctx_conf)
channel = chanctx_conf->def.chan;
else if (local->open_count > 0 &&
- local->open_count == local->monitors &&
+ local->open_count == local->virt_monitors &&
sdata->vif.type == NL80211_IFTYPE_MONITOR)
channel = local->monitor_chanreq.oper.chan;
else
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index afc6fda6b606b..3d7304ce23e23 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1378,7 +1378,7 @@ struct ieee80211_local {
spinlock_t queue_stop_reason_lock;
int open_count;
- int monitors, tx_mntrs;
+ int monitors, virt_monitors, 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 5616c0adbe093..768d774d7d1f9 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -582,11 +582,13 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_do
/* no need to tell driver */
break;
case NL80211_IFTYPE_MONITOR:
+ local->monitors--;
+
if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
!ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
- local->monitors--;
- if (local->monitors == 0) {
+ local->virt_monitors--;
+ if (local->virt_monitors == 0) {
local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
}
@@ -686,7 +688,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_do
case NL80211_IFTYPE_AP_VLAN:
break;
case NL80211_IFTYPE_MONITOR:
- if (local->monitors == 0)
+ if (local->virt_monitors == 0)
ieee80211_del_virtual_monitor(local);
ieee80211_recalc_idle(local);
@@ -723,7 +725,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_do
ieee80211_configure_filter(local);
ieee80211_hw_config(local, hw_reconf_flags);
- if (local->monitors == local->open_count)
+ if (local->virt_monitors == local->open_count)
ieee80211_add_virtual_monitor(local);
}
@@ -982,7 +984,7 @@ static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdat
local->hw.wiphy->frag_threshold != (u32)-1)
flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
- if (local->monitors)
+ if (local->virt_monitors)
flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
} else {
flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
@@ -992,7 +994,7 @@ static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdat
ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
- if (local->monitors &&
+ if (local->virt_monitors &&
!ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
} else {
@@ -1336,20 +1338,22 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
if (res)
goto err_stop;
} else {
- if (local->monitors == 0 && local->open_count == 0) {
+ if (local->virt_monitors == 0 && local->open_count == 0) {
res = ieee80211_add_virtual_monitor(local);
if (res)
goto err_stop;
}
- local->monitors++;
+ local->virt_monitors++;
/* must be before the call to ieee80211_configure_filter */
- if (local->monitors == 1) {
+ if (local->virt_monitors == 1) {
local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
}
}
+ local->monitors++;
+
ieee80211_adjust_monitor_flags(sdata, 1);
ieee80211_configure_filter(local);
ieee80211_recalc_offload(local);
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index fdda14c08e2b1..dec6e16b8c7d2 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -2156,7 +2156,8 @@ int ieee80211_reconfig(struct ieee80211_local *local)
wake_up:
- if (local->monitors == local->open_count && local->monitors > 0)
+ if (local->virt_monitors > 0 &&
+ local->virt_monitors == local->open_count)
ieee80211_add_virtual_monitor(local);
/*
--
2.39.5
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