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mac80211: correct MU-MIMO monitor follow functionality 

The MU-MIMO monitor follow functionality is broken because it
doesn't clear the MU-MIMO owner even if both follow features
are disabled. Fix that, and while at it move the code into a
new helper function. Call this also when creating a new monitor
interface to prepare for an upcoming cfg80211 change allowing
that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2017-04-12 10:46:13 +02:00
parent b0265024b8
commit 8c5e688944
1 changed files with 58 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
net/mac80211/cfg.c
View File

@ -22,6 +22,49 @@
#include "mesh.h"
#include "wme.h"
static int ieee80211_set_mu_mimo_follow(struct ieee80211_sub_if_data *sdata,
struct vif_params *params)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_sub_if_data *monitor_sdata;
bool mu_mimo_groups = false;
bool mu_mimo_follow = false;
monitor_sdata = rtnl_dereference(local->monitor_sdata);
if (!monitor_sdata)
return -EOPNOTSUPP;
if (params->vht_mumimo_groups) {
u64 membership;
BUILD_BUG_ON(sizeof(membership) != WLAN_MEMBERSHIP_LEN);
memcpy(monitor_sdata->vif.bss_conf.mu_group.membership,
params->vht_mumimo_groups, WLAN_MEMBERSHIP_LEN);
memcpy(monitor_sdata->vif.bss_conf.mu_group.position,
params->vht_mumimo_groups + WLAN_MEMBERSHIP_LEN,
WLAN_USER_POSITION_LEN);
ieee80211_bss_info_change_notify(monitor_sdata,
BSS_CHANGED_MU_GROUPS);
/* don't care about endianness - just check for 0 */
memcpy(&membership, params->vht_mumimo_groups,
WLAN_MEMBERSHIP_LEN);
mu_mimo_groups = membership != 0;
}
if (params->vht_mumimo_follow_addr) {
mu_mimo_follow =
is_valid_ether_addr(params->vht_mumimo_follow_addr);
ether_addr_copy(monitor_sdata->u.mntr.mu_follow_addr,
params->vht_mumimo_follow_addr);
}
monitor_sdata->vif.mu_mimo_owner = mu_mimo_groups || mu_mimo_follow;
return 0;
}
static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
const char *name,
unsigned char name_assign_type,
@ -38,9 +81,17 @@ static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
if (err)
return ERR_PTR(err);
if (type == NL80211_IFTYPE_MONITOR && flags) {
sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
sdata->u.mntr.flags = *flags;
sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
if (type == NL80211_IFTYPE_MONITOR) {
err = ieee80211_set_mu_mimo_follow(sdata, params);
if (err) {
ieee80211_if_remove(sdata);
return NULL;
}
if (flags)
sdata->u.mntr.flags = *flags;
}
return wdev;
@ -76,24 +127,11 @@ static int ieee80211_change_iface(struct wiphy *wiphy,
if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
struct ieee80211_local *local = sdata->local;
struct ieee80211_sub_if_data *monitor_sdata;
u32 mu_mntr_cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
int err;
monitor_sdata = rtnl_dereference(local->monitor_sdata);
if (monitor_sdata && params->vht_mumimo_groups) {
memcpy(monitor_sdata->vif.bss_conf.mu_group.membership,
params->vht_mumimo_groups, WLAN_MEMBERSHIP_LEN);
memcpy(monitor_sdata->vif.bss_conf.mu_group.position,
params->vht_mumimo_groups + WLAN_MEMBERSHIP_LEN,
WLAN_USER_POSITION_LEN);
monitor_sdata->vif.mu_mimo_owner = true;
ieee80211_bss_info_change_notify(monitor_sdata,
BSS_CHANGED_MU_GROUPS);
}
if (monitor_sdata && params->vht_mumimo_follow_addr)
ether_addr_copy(monitor_sdata->u.mntr.mu_follow_addr,
params->vht_mumimo_follow_addr);
err = ieee80211_set_mu_mimo_follow(sdata, params);
if (err)
return err;
if (!flags)
return 0;