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openwrt/package/kernel/mac80211/patches/subsys/355-wifi-mac80211-add-flag-to-opt-out-of-virtual-monitor.patch
Felix Fietkau 87033c3a0b mac80211: improve single-wiphy multi-radio support 
- add support for configuring allowed radios for a vif
- add support for monitor mode on multiple channels

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2024-10-22 14:40:42 +02:00

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From: Felix Fietkau <nbd@nbd.name>
Date: Mon, 30 Sep 2024 15:09:45 +0200
Subject: [PATCH] wifi: mac80211: add flag to opt out of virtual monitor
support
This is useful for multi-radio devices that are capable of monitoring on
multiple channels simultanenously. When this flag is set, each monitor
interface is passed to the driver individually and can have a configured
channel.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2679,6 +2679,11 @@ struct ieee80211_txq {
* a virtual monitor interface when monitor interfaces are the only
* active interfaces.
*
+ * @IEEE80211_HW_NO_VIRTUAL_MONITOR: The driver would like to be informed
+ * of any monitor interface, as well as their configured channel.
+ * This is useful for supporting multiple monitor interfaces on different
+ * channels.
+ *
* @IEEE80211_HW_NO_AUTO_VIF: The driver would like for no wlanX to
* be created. It is expected user-space will create vifs as
* desired (and thus have them named as desired).
@@ -2838,6 +2843,7 @@ enum ieee80211_hw_flags {
IEEE80211_HW_SUPPORTS_DYNAMIC_PS,
IEEE80211_HW_MFP_CAPABLE,
IEEE80211_HW_WANT_MONITOR_VIF,
+ IEEE80211_HW_NO_VIRTUAL_MONITOR,
IEEE80211_HW_NO_AUTO_VIF,
IEEE80211_HW_SW_CRYPTO_CONTROL,
IEEE80211_HW_SUPPORT_FAST_XMIT,
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -105,8 +105,11 @@ static int ieee80211_set_mon_options(str
}
/* also validate MU-MIMO change */
- monitor_sdata = wiphy_dereference(local->hw.wiphy,
- local->monitor_sdata);
+ if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
+ monitor_sdata = sdata;
+ else
+ monitor_sdata = wiphy_dereference(local->hw.wiphy,
+ local->monitor_sdata);
if (!monitor_sdata &&
(params->vht_mumimo_groups || params->vht_mumimo_follow_addr))
@@ -114,7 +117,9 @@ static int ieee80211_set_mon_options(str
/* apply all changes now - no failures allowed */
- if (monitor_sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
+ if (monitor_sdata &&
+ (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) ||
+ ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)))
ieee80211_set_mu_mimo_follow(monitor_sdata, params);
if (params->flags) {
@@ -889,22 +894,25 @@ static int ieee80211_set_monitor_channel
lockdep_assert_wiphy(local->hw.wiphy);
- if (cfg80211_chandef_identical(&local->monitor_chanreq.oper,
- &chanreq.oper))
- return 0;
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (!ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
+ if (cfg80211_chandef_identical(&local->monitor_chanreq.oper,
+ &chanreq.oper))
+ return 0;
- sdata = wiphy_dereference(local->hw.wiphy,
- local->monitor_sdata);
- if (!sdata)
- goto done;
+ sdata = wiphy_dereference(wiphy, local->monitor_sdata);
+ if (!sdata)
+ goto done;
+ }
- if (cfg80211_chandef_identical(&sdata->vif.bss_conf.chanreq.oper,
+ if (rcu_access_pointer(sdata->deflink.conf->chanctx_conf) &&
+ cfg80211_chandef_identical(&sdata->vif.bss_conf.chanreq.oper,
&chanreq.oper))
return 0;
ieee80211_link_release_channel(&sdata->deflink);
ret = ieee80211_link_use_channel(&sdata->deflink, &chanreq,
- IEEE80211_CHANCTX_EXCLUSIVE);
+ IEEE80211_CHANCTX_SHARED);
if (ret)
return ret;
done:
@@ -3049,7 +3057,8 @@ static int ieee80211_set_tx_power(struct
if (wdev) {
sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
- if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
+ if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
+ !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
return -EOPNOTSUPP;
@@ -3097,7 +3106,8 @@ static int ieee80211_set_tx_power(struct
}
list_for_each_entry(sdata, &local->interfaces, list) {
- if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
+ if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
+ !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
has_monitor = true;
continue;
}
@@ -3107,7 +3117,8 @@ static int ieee80211_set_tx_power(struct
sdata->vif.bss_conf.txpower_type = txp_type;
}
list_for_each_entry(sdata, &local->interfaces, list) {
- if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
+ if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
+ !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
continue;
ieee80211_recalc_txpower(sdata, update_txp_type);
}
@@ -4299,7 +4310,8 @@ static int ieee80211_cfg_get_channel(str
if (chanctx_conf) {
*chandef = link->conf->chanreq.oper;
ret = 0;
- } else if (local->open_count > 0 &&
+ } else if (!ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR) &&
+ local->open_count > 0 &&
local->open_count == local->monitors &&
sdata->vif.type == NL80211_IFTYPE_MONITOR) {
*chandef = local->monitor_chanreq.oper;
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -337,6 +337,10 @@ ieee80211_get_chanctx_max_required_bw(st
case NL80211_IFTYPE_P2P_DEVICE:
case NL80211_IFTYPE_NAN:
continue;
+ case NL80211_IFTYPE_MONITOR:
+ WARN_ON_ONCE(!ieee80211_hw_check(&local->hw,
+ NO_VIRTUAL_MONITOR));
+ fallthrough;
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
case NL80211_IFTYPE_OCB:
@@ -345,7 +349,6 @@ ieee80211_get_chanctx_max_required_bw(st
case NL80211_IFTYPE_WDS:
case NL80211_IFTYPE_UNSPECIFIED:
case NUM_NL80211_IFTYPES:
- case NL80211_IFTYPE_MONITOR:
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_P2P_GO:
WARN_ON_ONCE(1);
@@ -954,6 +957,10 @@ void ieee80211_recalc_smps_chanctx(struc
if (!link->sdata->u.mgd.associated)
continue;
break;
+ case NL80211_IFTYPE_MONITOR:
+ if (!ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
+ continue;
+ break;
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
@@ -966,6 +973,11 @@ void ieee80211_recalc_smps_chanctx(struc
if (rcu_access_pointer(link->conf->chanctx_conf) != &chanctx->conf)
continue;
+ if (link->sdata->vif.type == NL80211_IFTYPE_MONITOR) {
+ rx_chains_dynamic = rx_chains_static = local->rx_chains;
+ break;
+ }
+
switch (link->smps_mode) {
default:
WARN_ONCE(1, "Invalid SMPS mode %d\n",
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -465,6 +465,7 @@ static const char *hw_flag_names[] = {
FLAG(SUPPORTS_DYNAMIC_PS),
FLAG(MFP_CAPABLE),
FLAG(WANT_MONITOR_VIF),
+ FLAG(NO_VIRTUAL_MONITOR),
FLAG(NO_AUTO_VIF),
FLAG(SW_CRYPTO_CONTROL),
FLAG(SUPPORT_FAST_XMIT),
--- a/net/mac80211/driver-ops.c
+++ b/net/mac80211/driver-ops.c
@@ -65,6 +65,7 @@ int drv_add_interface(struct ieee80211_l
if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
(sdata->vif.type == NL80211_IFTYPE_MONITOR &&
!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
+ !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR) &&
!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))))
return -EINVAL;
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -279,8 +279,13 @@ static int _ieee80211_change_mac(struct
ret = eth_mac_addr(sdata->dev, sa);
if (ret == 0) {
- memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
- ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
+ if (check_dup) {
+ memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
+ ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
+ } else {
+ memset(sdata->vif.addr, 0, ETH_ALEN);
+ memset(sdata->vif.bss_conf.addr, 0, ETH_ALEN);
+ }
}
/* Regardless of eth_mac_addr() return we still want to add the
@@ -699,9 +704,11 @@ static void ieee80211_do_stop(struct iee
ieee80211_recalc_idle(local);
ieee80211_recalc_offload(local);
- if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
+ if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
+ !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
break;
+ ieee80211_link_release_channel(&sdata->deflink);
fallthrough;
default:
if (!going_down)
@@ -1131,7 +1138,8 @@ int ieee80211_add_virtual_monitor(struct
ASSERT_RTNL();
lockdep_assert_wiphy(local->hw.wiphy);
- if (local->monitor_sdata)
+ if (local->monitor_sdata ||
+ ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
return 0;
sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
@@ -1193,6 +1201,9 @@ void ieee80211_del_virtual_monitor(struc
{
struct ieee80211_sub_if_data *sdata;
+ if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
+ return;
+
ASSERT_RTNL();
lockdep_assert_wiphy(local->hw.wiphy);
@@ -1328,7 +1339,8 @@ int ieee80211_do_open(struct wireless_de
break;
}
- if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
+ if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
+ ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
res = drv_add_interface(local, sdata);
if (res)
goto err_stop;
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -840,6 +840,9 @@ ieee80211_rx_monitor(struct ieee80211_lo
bool last_monitor = list_is_last(&sdata->u.mntr.list,
&local->mon_list);
+ if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
+ ieee80211_handle_mu_mimo_mon(sdata, origskb, rtap_space);
+
if (!monskb)
monskb = ieee80211_make_monitor_skb(local, &origskb,
rate, rtap_space,
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1763,7 +1763,8 @@ static bool __ieee80211_tx(struct ieee80
switch (sdata->vif.type) {
case NL80211_IFTYPE_MONITOR:
- if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
+ if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
+ ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
vif = &sdata->vif;
break;
}
@@ -3952,7 +3953,8 @@ begin:
switch (tx.sdata->vif.type) {
case NL80211_IFTYPE_MONITOR:
- if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
+ if ((tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
+ ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
vif = &tx.sdata->vif;
break;
}
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -754,7 +754,8 @@ static void __iterate_interfaces(struct
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
switch (sdata->vif.type) {
case NL80211_IFTYPE_MONITOR:
- if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
+ if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
+ !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
continue;
break;
case NL80211_IFTYPE_AP_VLAN:
@@ -1857,8 +1858,10 @@ int ieee80211_reconfig(struct ieee80211_
}
list_for_each_entry(sdata, &local->interfaces, list) {
+ if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
+ !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
+ continue;
if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
- sdata->vif.type != NL80211_IFTYPE_MONITOR &&
ieee80211_sdata_running(sdata)) {
res = drv_add_interface(local, sdata);
if (WARN_ON(res))
@@ -1871,11 +1874,14 @@ int ieee80211_reconfig(struct ieee80211_
*/
if (res) {
list_for_each_entry_continue_reverse(sdata, &local->interfaces,
- list)
+ list) {
+ if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
+ !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
+ continue;
if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
- sdata->vif.type != NL80211_IFTYPE_MONITOR &&
ieee80211_sdata_running(sdata))
drv_remove_interface(local, sdata);
+ }
ieee80211_handle_reconfig_failure(local);
return res;
}
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