Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking changes from David Miller:

 1) Get rid of the error prone NLA_PUT*() macros that used an embedded
    goto.

 2) Kill off the token-ring and MCA networking drivers, from Paul
    Gortmaker.

 3) Reduce high-order allocations made by datagram AF_UNIX sockets, from
    Eric Dumazet.

 4) Add PTP hardware clock support to IGB and IXGBE, from Richard
    Cochran and Jacob Keller.

 5) Allow users to query timestamping capabilities of a card via
    ethtool, from Richard Cochran.

 6) Add loadbalance mode to the teaming driver, from Jiri Pirko.  Part
    of this is that we can now have BPF filters not attached to sockets,
    and the loadbalancing function is calculated using one.

 7) Francois Romieu went through the network drivers removing gratuitous
    uses of netdev->base_addr, perhaps some day we can remove it
    completely but it's used for ISA probing still.

 8) Add a BPF JIT for sparc.  I know, who cares, right? :-)

 9) Move networking sysctl registry away from using the compatability
    mode interfaces in the sysctl code.  From Eric W Biederman.

10) Pavel Emelyanov added a way to save and restore TCP socket state via
    TCP_REPAIR, TCP_REPAIR_QUEUE, and TCP_QUEUE_SEQ socket options as
    well as a way to forcefully bind a socket to a port via the
    sk->sk_reuse value SK_FORCE_REUSE.  There is also a
    TCP_REPAIR_OPTIONS which allows to reinstante the TCP options
    enabled on the connection.

11) Several enhancements from Eric Dumazet that, in particular, can
    enhance splice performance on TCP sockets significantly.

     a) Reset the offset of the per-socket sendmsg page when we know
        we're the only use of the page in linear_to_page().

     b) Add facilities such that skb->data can be backed a page rather
        than SLAB kmalloc'd memory.  In particular devices which were
        receiving into linear RX buffers can now end up providing paged
        data.

    The big result is that code like splice and GRO do not have to copy
    any more.

12) Allow a pure sender to more gracefully handle ACK backlogs in TCP.
    What can happen at high rates is that the sender hasn't grown his
    receive buffer limits at all (he's not receiving data so really
    doesn't need to), but the non-data ACKs consume receive buffer
    space.

    sk_add_backlog() is too aggressive in dropping frames in this case,
    so relax it's requirements by using the receive buffer plus the send
    buffer limit as the backlog limit instead of just the former.

    Also from Eric Dumazet.

13) Add ipv6 support to L2TP, from Benjamin LaHaise, James Chapman, and
    Chris Elston.

14) Implement TCP early retransmit (RFC 5827), from Yuchung Cheng.
    Basically, we can start fast retransmit before hiting the dupack
    threshold under certain conditions.

15) New CODEL active queue management packet scheduler, from Eric
    Dumazet based upon initial work by Dave Taht.

    Basically, the big feature is that packets are dropped (or ECN bits
    are set) based upon how long packets live in the queue, rather than
    the queue length (which is what RED uses).

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1341 commits)
  drivers/net/stmmac: seq_file fix memory leak
  ipv6/exthdrs: strict Pad1 and PadN check
  USB: qmi_wwan: Add ZTE (Vodafone) K3520-Z
  USB: qmi_wwan: Add ZTE (Vodafone) K3765-Z
  USB: qmi_wwan: Make forced int 4 whitelist generic
  net/ipv4: replace simple_strtoul with kstrtoul
  net/ipv4/ipconfig: neaten __setup placement
  net: qmi_wwan: Add Vodafone/Huawei K5005 support
  net: cdc_ether: Add ZTE WWAN matches before generic Ethernet
  ipv6: use skb coalescing in reassembly
  ipv4: use skb coalescing in defragmentation
  net: introduce skb_try_coalesce()
  net:ipv6:fixed space issues relating to operators.
  net:ipv6:fixed a trailing white space issue.
  ipv6: disable GSO on sockets hitting dst_allfrag
  tg3: use netdev_alloc_frag() API
  net: napi_frags_skb() is static
  ppp: avoid false drop_monitor false positives
  ipv6: bool/const conversions phase2
  ipx: Remove spurious NULL checking in ipx_ioctl().
  ...

1 files changed, 166 insertions, 71 deletions

diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 4e53c4cbca9e..8cc8461b48a0 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -82,20 +82,14 @@ static inline void mesh_plink_fsm_restart(struct sta_info *sta)
 }
 
 /*
- * NOTE: This is just an alias for sta_info_alloc(), see notes
- *       on it in the lifecycle management section!
+ * Allocate mesh sta entry and insert into station table
  */
 static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
-					 u8 *hw_addr, u32 rates,
-					 struct ieee802_11_elems *elems)
+					 u8 *hw_addr)
 {
-	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_supported_band *sband;
 	struct sta_info *sta;
 
-	sband = local->hw.wiphy->bands[local->oper_channel->band];
-
-	if (local->num_sta >= MESH_MAX_PLINKS)
+	if (sdata->local->num_sta >= MESH_MAX_PLINKS)
 		return NULL;
 
 	sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
@@ -108,16 +102,70 @@ static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
 
 	set_sta_flag(sta, WLAN_STA_WME);
 
-	sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
-	if (elems->ht_cap_elem)
-		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
-						  elems->ht_cap_elem,
-						  &sta->sta.ht_cap);
-	rate_control_rate_init(sta);
-
 	return sta;
 }
 
+/** mesh_set_ht_prot_mode - set correct HT protection mode
+ *
+ * Section 9.23.3.5 of IEEE 80211s standard describes the protection rules for
+ * HT mesh STA in a MBSS. Three HT protection modes are supported for now,
+ * non-HT mixed mode, 20MHz-protection and no-protection mode. non-HT mixed
+ * mode is selected if any non-HT peers are present in our MBSS.
+ * 20MHz-protection mode is selected if all peers in our 20/40MHz MBSS support
+ * HT and atleast one HT20 peer is present. Otherwise no-protection mode is
+ * selected.
+ */
+static u32 mesh_set_ht_prot_mode(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	u32 changed = 0;
+	u16 ht_opmode;
+	bool non_ht_sta = false, ht20_sta = false;
+
+	if (local->_oper_channel_type == NL80211_CHAN_NO_HT)
+		return 0;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sta, &local->sta_list, list) {
+		if (sdata == sta->sdata &&
+		    sta->plink_state == NL80211_PLINK_ESTAB) {
+			switch (sta->ch_type) {
+			case NL80211_CHAN_NO_HT:
+				mpl_dbg("mesh_plink %pM: nonHT sta (%pM) is present",
+					sdata->vif.addr, sta->sta.addr);
+				non_ht_sta = true;
+				goto out;
+			case NL80211_CHAN_HT20:
+				mpl_dbg("mesh_plink %pM: HT20 sta (%pM) is present",
+					sdata->vif.addr, sta->sta.addr);
+				ht20_sta = true;
+			default:
+				break;
+			}
+		}
+	}
+out:
+	rcu_read_unlock();
+
+	if (non_ht_sta)
+		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED;
+	else if (ht20_sta && local->_oper_channel_type > NL80211_CHAN_HT20)
+		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_20MHZ;
+	else
+		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
+
+	if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
+		sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
+		sdata->u.mesh.mshcfg.ht_opmode = ht_opmode;
+		changed = BSS_CHANGED_HT;
+		mpl_dbg("mesh_plink %pM: protection mode changed to %d",
+			sdata->vif.addr, ht_opmode);
+	}
+
+	return changed;
+}
+
 /**
  * __mesh_plink_deactivate - deactivate mesh peer link
  *
@@ -187,7 +235,7 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
 			    2 + sdata->u.mesh.mesh_id_len +
 			    2 + sizeof(struct ieee80211_meshconf_ie) +
 			    2 + sizeof(struct ieee80211_ht_cap) +
-			    2 + sizeof(struct ieee80211_ht_info) +
+			    2 + sizeof(struct ieee80211_ht_operation) +
 			    2 + 8 + /* peering IE */
 			    sdata->u.mesh.ie_len);
 	if (!skb)
@@ -212,8 +260,8 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
 			pos = skb_put(skb, 2);
 			memcpy(pos + 2, &plid, 2);
 		}
-		if (ieee80211_add_srates_ie(&sdata->vif, skb) ||
-		    ieee80211_add_ext_srates_ie(&sdata->vif, skb) ||
+		if (ieee80211_add_srates_ie(&sdata->vif, skb, true) ||
+		    ieee80211_add_ext_srates_ie(&sdata->vif, skb, true) ||
 		    mesh_add_rsn_ie(skb, sdata) ||
 		    mesh_add_meshid_ie(skb, sdata) ||
 		    mesh_add_meshconf_ie(skb, sdata))
@@ -263,7 +311,7 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
 
 	if (action != WLAN_SP_MESH_PEERING_CLOSE) {
 		if (mesh_add_ht_cap_ie(skb, sdata) ||
-		    mesh_add_ht_info_ie(skb, sdata))
+		    mesh_add_ht_oper_ie(skb, sdata))
 			return -1;
 	}
 
@@ -274,43 +322,93 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
 	return 0;
 }
 
-void mesh_neighbour_update(u8 *hw_addr, u32 rates,
-		struct ieee80211_sub_if_data *sdata,
-		struct ieee802_11_elems *elems)
+/* mesh_peer_init - initialize new mesh peer and return resulting sta_info
+ *
+ * @sdata: local meshif
+ * @addr: peer's address
+ * @elems: IEs from beacon or mesh peering frame
+ *
+ * call under RCU
+ */
+static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata,
+				       u8 *addr,
+				       struct ieee802_11_elems *elems)
 {
 	struct ieee80211_local *local = sdata->local;
+	enum ieee80211_band band = local->oper_channel->band;
+	struct ieee80211_supported_band *sband;
+	u32 rates, basic_rates = 0;
 	struct sta_info *sta;
+	bool insert = false;
 
-	rcu_read_lock();
+	sband = local->hw.wiphy->bands[band];
+	rates = ieee80211_sta_get_rates(local, elems, band, &basic_rates);
 
-	sta = sta_info_get(sdata, hw_addr);
+	sta = sta_info_get(sdata, addr);
 	if (!sta) {
-		rcu_read_unlock();
-		/* Userspace handles peer allocation when security is enabled
-		 * */
-		if (sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED)
-			cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr,
-					elems->ie_start, elems->total_len,
-					GFP_KERNEL);
-		else
-			sta = mesh_plink_alloc(sdata, hw_addr, rates, elems);
+		sta = mesh_plink_alloc(sdata, addr);
 		if (!sta)
-			return;
-		if (sta_info_insert_rcu(sta)) {
-			rcu_read_unlock();
-			return;
-		}
+			return NULL;
+		insert = true;
 	}
 
+	spin_lock_bh(&sta->lock);
 	sta->last_rx = jiffies;
-	sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
+	sta->sta.supp_rates[band] = rates;
+	if (elems->ht_cap_elem &&
+	    sdata->local->_oper_channel_type != NL80211_CHAN_NO_HT)
+		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
+						  elems->ht_cap_elem,
+						  &sta->sta.ht_cap);
+	else
+		memset(&sta->sta.ht_cap, 0, sizeof(sta->sta.ht_cap));
+
+	if (elems->ht_operation) {
+		if (!(elems->ht_operation->ht_param &
+		      IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
+			sta->sta.ht_cap.cap &=
+					    ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+		sta->ch_type =
+			ieee80211_ht_oper_to_channel_type(elems->ht_operation);
+	}
+
+	rate_control_rate_init(sta);
+	spin_unlock_bh(&sta->lock);
+
+	if (insert && sta_info_insert(sta))
+		return NULL;
+
+	return sta;
+}
+
+void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
+			   u8 *hw_addr,
+			   struct ieee802_11_elems *elems)
+{
+	struct sta_info *sta;
+
+	/* Userspace handles peer allocation when security is enabled */
+	if (sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED) {
+		cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr,
+						   elems->ie_start,
+						   elems->total_len,
+						   GFP_KERNEL);
+		return;
+	}
+
+	rcu_read_lock();
+	sta = mesh_peer_init(sdata, hw_addr, elems);
+	if (!sta)
+		goto out;
+
 	if (mesh_peer_accepts_plinks(elems) &&
-			sta->plink_state == NL80211_PLINK_LISTEN &&
-			sdata->u.mesh.accepting_plinks &&
-			sdata->u.mesh.mshcfg.auto_open_plinks &&
-			rssi_threshold_check(sta, sdata))
+	    sta->plink_state == NL80211_PLINK_LISTEN &&
+	    sdata->u.mesh.accepting_plinks &&
+	    sdata->u.mesh.mshcfg.auto_open_plinks &&
+	    rssi_threshold_check(sta, sdata))
 		mesh_plink_open(sta);
 
+out:
 	rcu_read_unlock();
 }
 
@@ -456,15 +554,15 @@ void mesh_plink_block(struct sta_info *sta)
 void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt,
 			 size_t len, struct ieee80211_rx_status *rx_status)
 {
-	struct ieee80211_local *local = sdata->local;
 	struct ieee802_11_elems elems;
 	struct sta_info *sta;
 	enum plink_event event;
 	enum ieee80211_self_protected_actioncode ftype;
 	size_t baselen;
-	bool deactivated, matches_local = true;
+	bool matches_local = true;
 	u8 ie_len;
 	u8 *baseaddr;
+	u32 changed = 0;
 	__le16 plid, llid, reason;
 #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
 	static const char *mplstates[] = {
@@ -560,7 +658,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 	/* Now we will figure out the appropriate event... */
 	event = PLINK_UNDEFINED;
 	if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
-	    (!mesh_matches_local(&elems, sdata))) {
+	    !mesh_matches_local(sdata, &elems)) {
 		matches_local = false;
 		switch (ftype) {
 		case WLAN_SP_MESH_PEERING_OPEN:
@@ -583,29 +681,13 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 		return;
 	} else if (!sta) {
 		/* ftype == WLAN_SP_MESH_PEERING_OPEN */
-		u32 rates;
-
-		rcu_read_unlock();
-
 		if (!mesh_plink_free_count(sdata)) {
 			mpl_dbg("Mesh plink error: no more free plinks\n");
-			return;
-		}
-
-		rates = ieee80211_sta_get_rates(local, &elems, rx_status->band);
-		sta = mesh_plink_alloc(sdata, mgmt->sa, rates, &elems);
-		if (!sta) {
-			mpl_dbg("Mesh plink error: plink table full\n");
-			return;
-		}
-		if (sta_info_insert_rcu(sta)) {
 			rcu_read_unlock();
 			return;
 		}
 		event = OPN_ACPT;
-		spin_lock_bh(&sta->lock);
 	} else if (matches_local) {
-		spin_lock_bh(&sta->lock);
 		switch (ftype) {
 		case WLAN_SP_MESH_PEERING_OPEN:
 			if (!mesh_plink_free_count(sdata) ||
@@ -642,12 +724,19 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			break;
 		default:
 			mpl_dbg("Mesh plink: unknown frame subtype\n");
-			spin_unlock_bh(&sta->lock);
 			rcu_read_unlock();
 			return;
 		}
-	} else {
-		spin_lock_bh(&sta->lock);
+	}
+
+	if (event == OPN_ACPT) {
+		/* allocate sta entry if necessary and update info */
+		sta = mesh_peer_init(sdata, mgmt->sa, &elems);
+		if (!sta) {
+			mpl_dbg("Mesh plink: failed to init peer!\n");
+			rcu_read_unlock();
+			return;
+		}
 	}
 
 	mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n",
@@ -655,6 +744,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 		le16_to_cpu(sta->llid), le16_to_cpu(sta->plid),
 		event);
 	reason = 0;
+	spin_lock_bh(&sta->lock);
 	switch (sta->plink_state) {
 		/* spin_unlock as soon as state is updated at each case */
 	case NL80211_PLINK_LISTEN:
@@ -758,7 +848,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			sta->plink_state = NL80211_PLINK_ESTAB;
 			spin_unlock_bh(&sta->lock);
 			mesh_plink_inc_estab_count(sdata);
-			ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
+			changed |= mesh_set_ht_prot_mode(sdata);
+			changed |= BSS_CHANGED_BEACON;
 			mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
 				sta->sta.addr);
 			break;
@@ -793,7 +884,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			sta->plink_state = NL80211_PLINK_ESTAB;
 			spin_unlock_bh(&sta->lock);
 			mesh_plink_inc_estab_count(sdata);
-			ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
+			changed |= mesh_set_ht_prot_mode(sdata);
+			changed |= BSS_CHANGED_BEACON;
 			mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
 				sta->sta.addr);
 			mesh_plink_frame_tx(sdata,
@@ -811,13 +903,13 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 		case CLS_ACPT:
 			reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
 			sta->reason = reason;
-			deactivated = __mesh_plink_deactivate(sta);
+			__mesh_plink_deactivate(sta);
 			sta->plink_state = NL80211_PLINK_HOLDING;
 			llid = sta->llid;
 			mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
 			spin_unlock_bh(&sta->lock);
-			if (deactivated)
-				ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
+			changed |= mesh_set_ht_prot_mode(sdata);
+			changed |= BSS_CHANGED_BEACON;
 			mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
 					    sta->sta.addr, llid, plid, reason);
 			break;
@@ -864,4 +956,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 	}
 
 	rcu_read_unlock();
+
+	if (changed)
+		ieee80211_bss_info_change_notify(sdata, changed);
 }