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authorJohannes Berg <johannes.berg@intel.com>2020-04-17 12:40:15 +0200
committerJohannes Berg <johannes.berg@intel.com>2020-04-24 12:33:41 +0200
commit9dba48a6ece79da064655736dc7347a5fcadedef (patch)
tree9326dc07e0edc11983f6765f35b44146084ae3a3 /net/wireless
parent6cd536fe62ef58d7c4eac2da07ab0ed7fd19010d (diff)
cfg80211: support multicast RX registration
For DPP, there's a need to receive multicast action frames, but many drivers need a special filter configuration for this. Support announcing from userspace in the management registration that multicast RX is required, with an extended feature flag if the driver handles this. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Reviewed-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com> Link: https://lore.kernel.org/r/20200417124013.c46238801048.Ib041d437ce0bff28a0c6d5dc915f68f1d8591002@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/core.h3
-rw-r--r--net/wireless/mlme.c38
-rw-r--r--net/wireless/nl80211.c10
3 files changed, 42 insertions, 9 deletions
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 30fb2c35ae43..639d41896573 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -381,7 +381,8 @@ void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
struct net_device *dev);
int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
u16 frame_type, const u8 *match_data,
- int match_len, struct netlink_ext_ack *extack);
+ int match_len, bool multicast_rx,
+ struct netlink_ext_ack *extack);
void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk);
void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 2e1a21e90b83..409497a3527d 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -426,6 +426,8 @@ struct cfg80211_mgmt_registration {
__le16 frame_type;
+ bool multicast_rx;
+
u8 match[];
};
@@ -442,10 +444,18 @@ static void cfg80211_mgmt_registrations_update(struct wireless_dev *wdev)
list_for_each_entry_rcu(tmp, &rdev->wiphy.wdev_list, list) {
list_for_each_entry_rcu(reg, &tmp->mgmt_registrations, list) {
u32 mask = BIT(le16_to_cpu(reg->frame_type) >> 4);
+ u32 mcast_mask = 0;
+
+ if (reg->multicast_rx)
+ mcast_mask = mask;
upd.global_stypes |= mask;
- if (tmp == wdev)
+ upd.global_mcast_stypes |= mcast_mask;
+
+ if (tmp == wdev) {
upd.interface_stypes |= mask;
+ upd.interface_mcast_stypes |= mcast_mask;
+ }
}
}
rcu_read_unlock();
@@ -465,11 +475,13 @@ void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk)
int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
u16 frame_type, const u8 *match_data,
- int match_len, struct netlink_ext_ack *extack)
+ int match_len, bool multicast_rx,
+ struct netlink_ext_ack *extack)
{
struct cfg80211_mgmt_registration *reg, *nreg;
int err = 0;
u16 mgmt_type;
+ bool update_multicast = false;
if (!wdev->wiphy->mgmt_stypes)
return -EOPNOTSUPP;
@@ -520,6 +532,11 @@ int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
continue;
if (memcmp(reg->match, match_data, mlen) == 0) {
+ if (reg->multicast_rx != multicast_rx) {
+ update_multicast = true;
+ reg->multicast_rx = multicast_rx;
+ break;
+ }
NL_SET_ERR_MSG(extack, "Match already configured");
err = -EALREADY;
break;
@@ -529,12 +546,17 @@ int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
if (err)
goto out;
- memcpy(nreg->match, match_data, match_len);
- nreg->match_len = match_len;
- nreg->nlportid = snd_portid;
- nreg->frame_type = cpu_to_le16(frame_type);
- nreg->wdev = wdev;
- list_add(&nreg->list, &wdev->mgmt_registrations);
+ if (update_multicast) {
+ kfree(nreg);
+ } else {
+ memcpy(nreg->match, match_data, match_len);
+ nreg->match_len = match_len;
+ nreg->nlportid = snd_portid;
+ nreg->frame_type = cpu_to_le16(frame_type);
+ nreg->wdev = wdev;
+ nreg->multicast_rx = multicast_rx;
+ list_add(&nreg->list, &wdev->mgmt_registrations);
+ }
spin_unlock_bh(&wdev->mgmt_registrations_lock);
cfg80211_mgmt_registrations_update(wdev);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 2127e5344b1a..73a3e885d4dd 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -661,6 +661,7 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_CONTROL_PORT_NO_PREAUTH] = { .type = NLA_FLAG },
[NL80211_ATTR_PMK_LIFETIME] = NLA_POLICY_MIN(NLA_U32, 1),
[NL80211_ATTR_PMK_REAUTH_THRESHOLD] = NLA_POLICY_RANGE(NLA_U8, 1, 100),
+ [NL80211_ATTR_RECEIVE_MULTICAST] = { .type = NLA_FLAG },
};
/* policy for the key attributes */
@@ -10773,9 +10774,18 @@ static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
if (!rdev->ops->mgmt_tx)
return -EOPNOTSUPP;
+ if (info->attrs[NL80211_ATTR_RECEIVE_MULTICAST] &&
+ !wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_MULTICAST_REGISTRATIONS)) {
+ GENL_SET_ERR_MSG(info,
+ "multicast RX registrations are not supported");
+ return -EOPNOTSUPP;
+ }
+
return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]),
+ info->attrs[NL80211_ATTR_RECEIVE_MULTICAST],
info->extack);
}