From cb3b7d87652aeb37cfb5295a6157a3280dae10cb Mon Sep 17 00:00:00 2001 From: Ayala Beker Date: Tue, 20 Sep 2016 17:31:13 +0300 Subject: cfg80211: add start / stop NAN commands This allows user space to start/stop NAN interface. A NAN interface is like P2P device in a few aspects: it doesn't have a netdev associated to it. Add the new interface type and prevent operations that can't be executed on NAN interface like scan. Define several attributes that may be configured by user space when starting NAN functionality (master preference and dual band operation) Signed-off-by: Andrei Otcheretianski Signed-off-by: Emmanuel Grumbach Signed-off-by: Luca Coelho Signed-off-by: Johannes Berg --- net/mac80211/cfg.c | 2 ++ net/mac80211/chan.c | 3 ++ net/mac80211/iface.c | 4 +++ net/mac80211/offchannel.c | 1 + net/mac80211/rx.c | 3 ++ net/mac80211/util.c | 1 + net/wireless/chan.c | 2 ++ net/wireless/core.c | 34 ++++++++++++++++++ net/wireless/core.h | 3 ++ net/wireless/mlme.c | 1 + net/wireless/nl80211.c | 91 +++++++++++++++++++++++++++++++++++++++++++++-- net/wireless/rdev-ops.h | 20 +++++++++++ net/wireless/trace.h | 27 ++++++++++++++ net/wireless/util.c | 6 ++-- 14 files changed, 193 insertions(+), 5 deletions(-) (limited to 'net') diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index e29ff5749944..a74027f887bc 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -257,6 +257,7 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev, case NL80211_IFTYPE_WDS: case NL80211_IFTYPE_MONITOR: case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: case NL80211_IFTYPE_UNSPECIFIED: case NUM_NL80211_IFTYPES: case NL80211_IFTYPE_P2P_CLIENT: @@ -2036,6 +2037,7 @@ static int ieee80211_scan(struct wiphy *wiphy, !(req->flags & NL80211_SCAN_FLAG_AP))) return -EOPNOTSUPP; break; + case NL80211_IFTYPE_NAN: default: return -EOPNOTSUPP; } diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 74142d07ad31..d035801569eb 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -274,6 +274,7 @@ ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local, ieee80211_get_max_required_bw(sdata)); break; case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: continue; case NL80211_IFTYPE_ADHOC: case NL80211_IFTYPE_WDS: @@ -718,6 +719,7 @@ void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, switch (sdata->vif.type) { case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: continue; case NL80211_IFTYPE_STATION: if (!sdata->u.mgd.associated) @@ -980,6 +982,7 @@ ieee80211_vif_chanctx_reservation_complete(struct ieee80211_sub_if_data *sdata) case NL80211_IFTYPE_P2P_CLIENT: case NL80211_IFTYPE_P2P_GO: case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: case NUM_NL80211_IFTYPES: WARN_ON(1); break; diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index b0abddc714ef..e694ca2baad0 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -545,6 +545,7 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) case NL80211_IFTYPE_ADHOC: case NL80211_IFTYPE_P2P_DEVICE: case NL80211_IFTYPE_OCB: + case NL80211_IFTYPE_NAN: /* no special treatment */ break; case NL80211_IFTYPE_UNSPECIFIED: @@ -660,6 +661,7 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) break; case NL80211_IFTYPE_WDS: case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: break; default: /* not reached */ @@ -948,6 +950,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, /* relies on synchronize_rcu() below */ RCU_INIT_POINTER(local->p2p_sdata, NULL); /* fall through */ + case NL80211_IFTYPE_NAN: default: cancel_work_sync(&sdata->work); /* @@ -1457,6 +1460,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, break; case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: sdata->vif.bss_conf.bssid = sdata->vif.addr; break; case NL80211_IFTYPE_UNSPECIFIED: diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c index 55a9c5b94ce1..75d5c960ce67 100644 --- a/net/mac80211/offchannel.c +++ b/net/mac80211/offchannel.c @@ -838,6 +838,7 @@ int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, case NL80211_IFTYPE_P2P_DEVICE: need_offchan = true; break; + case NL80211_IFTYPE_NAN: default: return -EOPNOTSUPP; } diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index e796060b7c5e..c9489a86e6d6 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -3586,6 +3586,9 @@ static bool ieee80211_accept_frame(struct ieee80211_rx_data *rx) ieee80211_is_probe_req(hdr->frame_control) || ieee80211_is_probe_resp(hdr->frame_control) || ieee80211_is_beacon(hdr->frame_control); + case NL80211_IFTYPE_NAN: + /* Currently no frames on NAN interface are allowed */ + return false; default: break; } diff --git a/net/mac80211/util.c b/net/mac80211/util.c index b6865d884487..2c78541f695c 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1975,6 +1975,7 @@ int ieee80211_reconfig(struct ieee80211_local *local) case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_MONITOR: case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: /* nothing to do */ break; case NL80211_IFTYPE_UNSPECIFIED: diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 0f506220a3bd..5497d022fada 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -372,6 +372,7 @@ int cfg80211_chandef_dfs_required(struct wiphy *wiphy, case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_WDS: case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: break; case NL80211_IFTYPE_UNSPECIFIED: case NUM_NL80211_IFTYPES: @@ -946,6 +947,7 @@ cfg80211_get_chan_state(struct wireless_dev *wdev, case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_WDS: case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: /* these interface types don't really have a channel */ return; case NL80211_IFTYPE_UNSPECIFIED: diff --git a/net/wireless/core.c b/net/wireless/core.c index 4911cd997b9a..013987243c0b 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -225,6 +225,23 @@ void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, } } +void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev) +{ + ASSERT_RTNL(); + + if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) + return; + + if (!wdev->nan_started) + return; + + rdev_stop_nan(rdev, wdev); + wdev->nan_started = false; + + rdev->opencount--; +} + void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) { struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); @@ -242,6 +259,9 @@ void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) case NL80211_IFTYPE_P2P_DEVICE: cfg80211_stop_p2p_device(rdev, wdev); break; + case NL80211_IFTYPE_NAN: + cfg80211_stop_nan(rdev, wdev); + break; default: break; } @@ -537,6 +557,11 @@ static int wiphy_verify_combinations(struct wiphy *wiphy) c->limits[j].max > 1)) return -EINVAL; + /* Only a single NAN can be allowed */ + if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && + c->limits[j].max > 1)) + return -EINVAL; + cnt += c->limits[j].max; /* * Don't advertise an unsupported type @@ -579,6 +604,10 @@ int wiphy_register(struct wiphy *wiphy) !rdev->ops->tdls_cancel_channel_switch))) return -EINVAL; + if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && + (!rdev->ops->start_nan || !rdev->ops->stop_nan))) + return -EINVAL; + /* * if a wiphy has unsupported modes for regulatory channel enforcement, * opt-out of enforcement checking @@ -589,6 +618,7 @@ int wiphy_register(struct wiphy *wiphy) BIT(NL80211_IFTYPE_P2P_GO) | BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_P2P_DEVICE) | + BIT(NL80211_IFTYPE_NAN) | BIT(NL80211_IFTYPE_AP_VLAN) | BIT(NL80211_IFTYPE_MONITOR))) wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; @@ -916,6 +946,9 @@ void cfg80211_unregister_wdev(struct wireless_dev *wdev) cfg80211_mlme_purge_registrations(wdev); cfg80211_stop_p2p_device(rdev, wdev); break; + case NL80211_IFTYPE_NAN: + cfg80211_stop_nan(rdev, wdev); + break; default: WARN_ON_ONCE(1); break; @@ -979,6 +1012,7 @@ void __cfg80211_leave(struct cfg80211_registered_device *rdev, /* must be handled by mac80211/driver, has no APIs */ break; case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: /* cannot happen, has no netdev */ break; case NL80211_IFTYPE_AP_VLAN: diff --git a/net/wireless/core.h b/net/wireless/core.h index 554f87d0f991..08d2e948c9ad 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -488,6 +488,9 @@ void cfg80211_leave(struct cfg80211_registered_device *rdev, void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev); +void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev); + #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c index d6abb0704db5..cbb48e26a871 100644 --- a/net/wireless/mlme.c +++ b/net/wireless/mlme.c @@ -634,6 +634,7 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, * fall through, P2P device only supports * public action frames */ + case NL80211_IFTYPE_NAN: default: err = -EOPNOTSUPP; break; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index b8441e60b0f6..9e9fb37087fc 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -409,6 +409,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { .len = VHT_MUMIMO_GROUPS_DATA_LEN }, [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN }, + [NL80211_ATTR_NAN_MASTER_PREF] = { .type = NLA_U8 }, + [NL80211_ATTR_NAN_DUAL] = { .type = NLA_U8 }, }; /* policy for the key attributes */ @@ -934,6 +936,7 @@ static int nl80211_key_allowed(struct wireless_dev *wdev) case NL80211_IFTYPE_UNSPECIFIED: case NL80211_IFTYPE_OCB: case NL80211_IFTYPE_MONITOR: + case NL80211_IFTYPE_NAN: case NL80211_IFTYPE_P2P_DEVICE: case NL80211_IFTYPE_WDS: case NUM_NL80211_IFTYPES: @@ -2819,7 +2822,7 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info) !(rdev->wiphy.interface_modes & (1 << type))) return -EOPNOTSUPP; - if ((type == NL80211_IFTYPE_P2P_DEVICE || + if ((type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN || rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) && info->attrs[NL80211_ATTR_MAC]) { nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC], @@ -2875,9 +2878,10 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info) wdev->mesh_id_up_len); wdev_unlock(wdev); break; + case NL80211_IFTYPE_NAN: case NL80211_IFTYPE_P2P_DEVICE: /* - * P2P Device doesn't have a netdev, so doesn't go + * P2P Device and NAN do not have a netdev, so don't go * through the netdev notifier and must be added here */ mutex_init(&wdev->mtx); @@ -6434,6 +6438,9 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) wiphy = &rdev->wiphy; + if (wdev->iftype == NL80211_IFTYPE_NAN) + return -EOPNOTSUPP; + if (!rdev->ops->scan) return -EOPNOTSUPP; @@ -8977,6 +8984,7 @@ static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info) case NL80211_IFTYPE_P2P_GO: case NL80211_IFTYPE_P2P_DEVICE: break; + case NL80211_IFTYPE_NAN: default: return -EOPNOTSUPP; } @@ -9022,6 +9030,7 @@ static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info) case NL80211_IFTYPE_MESH_POINT: case NL80211_IFTYPE_P2P_GO: break; + case NL80211_IFTYPE_NAN: default: return -EOPNOTSUPP; } @@ -9138,6 +9147,7 @@ static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *in case NL80211_IFTYPE_P2P_GO: case NL80211_IFTYPE_P2P_DEVICE: break; + case NL80211_IFTYPE_NAN: default: return -EOPNOTSUPP; } @@ -10504,6 +10514,58 @@ static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info) return 0; } +static int nl80211_start_nan(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg80211_registered_device *rdev = info->user_ptr[0]; + struct wireless_dev *wdev = info->user_ptr[1]; + struct cfg80211_nan_conf conf = {}; + int err; + + if (wdev->iftype != NL80211_IFTYPE_NAN) + return -EOPNOTSUPP; + + if (wdev->nan_started) + return -EEXIST; + + if (rfkill_blocked(rdev->rfkill)) + return -ERFKILL; + + if (!info->attrs[NL80211_ATTR_NAN_MASTER_PREF]) + return -EINVAL; + + if (!info->attrs[NL80211_ATTR_NAN_DUAL]) + return -EINVAL; + + conf.master_pref = + nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]); + if (!conf.master_pref) + return -EINVAL; + + conf.dual = nla_get_u8(info->attrs[NL80211_ATTR_NAN_DUAL]); + + err = rdev_start_nan(rdev, wdev, &conf); + if (err) + return err; + + wdev->nan_started = true; + rdev->opencount++; + + return 0; +} + +static int nl80211_stop_nan(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg80211_registered_device *rdev = info->user_ptr[0]; + struct wireless_dev *wdev = info->user_ptr[1]; + + if (wdev->iftype != NL80211_IFTYPE_NAN) + return -EOPNOTSUPP; + + cfg80211_stop_nan(rdev, wdev); + + return 0; +} + static int nl80211_get_protocol_features(struct sk_buff *skb, struct genl_info *info) { @@ -11205,7 +11267,14 @@ static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb, dev_hold(dev); } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) { - if (!wdev->p2p_started) { + if (wdev->iftype == NL80211_IFTYPE_P2P_DEVICE && + !wdev->p2p_started) { + if (rtnl) + rtnl_unlock(); + return -ENETDOWN; + } + if (wdev->iftype == NL80211_IFTYPE_NAN && + !wdev->nan_started) { if (rtnl) rtnl_unlock(); return -ENETDOWN; @@ -11838,6 +11907,22 @@ static const struct genl_ops nl80211_ops[] = { .internal_flags = NL80211_FLAG_NEED_WDEV_UP | NL80211_FLAG_NEED_RTNL, }, + { + .cmd = NL80211_CMD_START_NAN, + .doit = nl80211_start_nan, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + .internal_flags = NL80211_FLAG_NEED_WDEV | + NL80211_FLAG_NEED_RTNL, + }, + { + .cmd = NL80211_CMD_STOP_NAN, + .doit = nl80211_stop_nan, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + .internal_flags = NL80211_FLAG_NEED_WDEV_UP | + NL80211_FLAG_NEED_RTNL, + }, { .cmd = NL80211_CMD_SET_MCAST_RATE, .doit = nl80211_set_mcast_rate, diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h index 85ff30bee2b9..afb68a8428b9 100644 --- a/net/wireless/rdev-ops.h +++ b/net/wireless/rdev-ops.h @@ -887,6 +887,26 @@ static inline void rdev_stop_p2p_device(struct cfg80211_registered_device *rdev, trace_rdev_return_void(&rdev->wiphy); } +static inline int rdev_start_nan(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev, + struct cfg80211_nan_conf *conf) +{ + int ret; + + trace_rdev_start_nan(&rdev->wiphy, wdev, conf); + ret = rdev->ops->start_nan(&rdev->wiphy, wdev, conf); + trace_rdev_return_int(&rdev->wiphy, ret); + return ret; +} + +static inline void rdev_stop_nan(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev) +{ + trace_rdev_stop_nan(&rdev->wiphy, wdev); + rdev->ops->stop_nan(&rdev->wiphy, wdev); + trace_rdev_return_void(&rdev->wiphy); +} + static inline int rdev_set_mac_acl(struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_acl_data *params) diff --git a/net/wireless/trace.h b/net/wireless/trace.h index 72b5255cefe2..5f3370f4c6a2 100644 --- a/net/wireless/trace.h +++ b/net/wireless/trace.h @@ -1889,6 +1889,33 @@ DEFINE_EVENT(wiphy_wdev_evt, rdev_stop_p2p_device, TP_ARGS(wiphy, wdev) ); +TRACE_EVENT(rdev_start_nan, + TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev, + struct cfg80211_nan_conf *conf), + TP_ARGS(wiphy, wdev, conf), + TP_STRUCT__entry( + WIPHY_ENTRY + WDEV_ENTRY + __field(u8, master_pref) + __field(u8, dual); + ), + TP_fast_assign( + WIPHY_ASSIGN; + WDEV_ASSIGN; + __entry->master_pref = conf->master_pref; + __entry->dual = conf->dual; + ), + TP_printk(WIPHY_PR_FMT ", " WDEV_PR_FMT + ", master preference: %u, dual: %d", + WIPHY_PR_ARG, WDEV_PR_ARG, __entry->master_pref, + __entry->dual) +); + +DEFINE_EVENT(wiphy_wdev_evt, rdev_stop_nan, + TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev), + TP_ARGS(wiphy, wdev) +); + TRACE_EVENT(rdev_set_mac_acl, TP_PROTO(struct wiphy *wiphy, struct net_device *netdev, struct cfg80211_acl_data *params), diff --git a/net/wireless/util.c b/net/wireless/util.c index e02141d66b69..7a2d46b0058a 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -1008,8 +1008,9 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev, if (otype == NL80211_IFTYPE_AP_VLAN) return -EOPNOTSUPP; - /* cannot change into P2P device type */ - if (ntype == NL80211_IFTYPE_P2P_DEVICE) + /* cannot change into P2P device or NAN */ + if (ntype == NL80211_IFTYPE_P2P_DEVICE || + ntype == NL80211_IFTYPE_NAN) return -EOPNOTSUPP; if (!rdev->ops->change_virtual_intf || @@ -1088,6 +1089,7 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev, /* not happening */ break; case NL80211_IFTYPE_P2P_DEVICE: + case NL80211_IFTYPE_NAN: WARN_ON(1); break; } -- cgit v1.2.3