@@ -326,6 +326,8 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
mutex_init(&rdev->devlist_mtx);
mutex_init(&rdev->sched_scan_mtx);
INIT_LIST_HEAD(&rdev->wdev_list);
+ INIT_LIST_HEAD(&rdev->beacon_registrations);
+ spin_lock_init(&rdev->beacon_registrations_lock);
spin_lock_init(&rdev->bss_lock);
INIT_LIST_HEAD(&rdev->bss_list);
INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
@@ -699,10 +701,15 @@ EXPORT_SYMBOL(wiphy_unregister);
void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
{
struct cfg80211_internal_bss *scan, *tmp;
+ struct cfg80211_beacon_registration *reg, *treg;
rfkill_destroy(rdev->rfkill);
mutex_destroy(&rdev->mtx);
mutex_destroy(&rdev->devlist_mtx);
mutex_destroy(&rdev->sched_scan_mtx);
+ list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
+ list_del(®->list);
+ kfree(reg);
+ }
list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
cfg80211_put_bss(&scan->pub);
kfree(rdev);
@@ -55,7 +55,8 @@ struct cfg80211_registered_device {
int opencount; /* also protected by devlist_mtx */
wait_queue_head_t dev_wait;
- u32 ap_beacons_nlportid;
+ struct list_head beacon_registrations;
+ spinlock_t beacon_registrations_lock;
/* protected by RTNL only */
int num_running_ifaces;
@@ -260,6 +261,10 @@ enum cfg80211_chan_mode {
CHAN_MODE_EXCLUSIVE,
};
+struct cfg80211_beacon_registration {
+ struct list_head list;
+ u32 nlportid;
+};
/* free object */
extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
@@ -6914,16 +6914,36 @@ static int nl80211_probe_client(struct sk_buff *skb,
static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev = info->user_ptr[0];
+ struct cfg80211_beacon_registration *reg, *nreg;
+ int rv;
if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
return -EOPNOTSUPP;
- if (rdev->ap_beacons_nlportid)
- return -EBUSY;
+ nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
+ if (!nreg)
+ return -ENOMEM;
+
+ /* First, check if already registered. */
+ spin_lock_bh(&rdev->beacon_registrations_lock);
+ list_for_each_entry(reg, &rdev->beacon_registrations, list) {
+ if (reg->nlportid == info->snd_portid) {
+ rv = -EALREADY;
+ goto out_err;
+ }
+ }
+ /* Add it to the list */
+ memset(nreg, 0, sizeof(*nreg));
+ nreg->nlportid = info->snd_portid;
+ list_add(&nreg->list, &rdev->beacon_registrations);
- rdev->ap_beacons_nlportid = info->snd_portid;
+ spin_unlock_bh(&rdev->beacon_registrations_lock);
return 0;
+out_err:
+ spin_unlock_bh(&rdev->beacon_registrations_lock);
+ kfree(nreg);
+ return rv;
}
static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
@@ -8934,37 +8954,42 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy,
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
struct sk_buff *msg;
void *hdr;
- u32 nlportid = ACCESS_ONCE(rdev->ap_beacons_nlportid);
+ struct cfg80211_beacon_registration *reg;
trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
- if (!nlportid)
- return;
-
- msg = nlmsg_new(len + 100, gfp);
- if (!msg)
- return;
+ spin_lock_bh(&rdev->beacon_registrations_lock);
+ list_for_each_entry(reg, &rdev->beacon_registrations, list) {
+ msg = nlmsg_new(len + 100, gfp);
+ if (!msg) {
+ spin_unlock_bh(&rdev->beacon_registrations_lock);
+ return;
+ }
- hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
- if (!hdr) {
- nlmsg_free(msg);
- return;
- }
+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
+ if (!hdr) {
+ spin_unlock_bh(&rdev->beacon_registrations_lock);
+ nlmsg_free(msg);
+ return;
+ }
- if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
- (freq &&
- nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
- (sig_dbm &&
- nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
- nla_put(msg, NL80211_ATTR_FRAME, len, frame))
- goto nla_put_failure;
+ if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
+ (freq &&
+ nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
+ (sig_dbm &&
+ nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
+ nla_put(msg, NL80211_ATTR_FRAME, len, frame))
+ goto nla_put_failure;
- genlmsg_end(msg, hdr);
+ genlmsg_end(msg, hdr);
- genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
+ genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
+ }
+ spin_unlock_bh(&rdev->beacon_registrations_lock);
return;
nla_put_failure:
+ spin_unlock_bh(&rdev->beacon_registrations_lock);
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
@@ -8977,6 +9002,7 @@ static int nl80211_netlink_notify(struct notifier_block * nb,
struct netlink_notify *notify = _notify;
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
+ struct cfg80211_beacon_registration *reg, *tmp;
if (state != NETLINK_URELEASE)
return NOTIFY_DONE;
@@ -8986,8 +9012,16 @@ static int nl80211_netlink_notify(struct notifier_block * nb,
list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
cfg80211_mlme_unregister_socket(wdev, notify->portid);
- if (rdev->ap_beacons_nlportid == notify->portid)
- rdev->ap_beacons_nlportid = 0;
+
+ spin_lock_bh(&rdev->beacon_registrations_lock);
+ list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
+ list) {
+ if (reg->nlportid == notify->portid) {
+ list_del(®->list);
+ kfree(reg);
+ }
+ }
+ spin_unlock_bh(&rdev->beacon_registrations_lock);
}
rcu_read_unlock();